Podcasts about photosynthetic

A discovery in the dark depths of the Pacific Ocean has been challenging the scientific consensus of how oxygen is produced and has even called into question how life on Earth began.Photosynthetic organisms like plants and algae use energy from sunlight to create the planet's oxygen. But new evidence published by Prof. Andrew Sweetman and collaborators, including his former PhD student Dr Danielle de Jonge, has shown how oxygen is also produced in complete darkness at the seafloor 4,000 metres below the ocean surface, where no light can penetrate.Now Prof. Sweetman is returning to the Pacific with custom-built equipment, thanks for funding from The Nippon Foundation, to find out how this phenomenon is occurring.In this episode Prof. Sweetman and Dr de Jonge share their experience of making the Dark Oxygen discovery and the 'rollercoaster' they've experienced as their research paper continues to make global headlines.The Ocean Explorer podcast is produced by the Scottish Association for Marine Science (SAMS), an ocean research charity and partner of UHI based in Oban.In each episode, we take a deep dive into marine science topics with SAMS scientists and special guests.Interested in working or studying with us, or helping with our work? Visit www.sams.ac.uk to find out more.

FFoDpod.com   Patreon   Merchandise   CC-BY-SA  "SCP-548" by Photosynthetic and Dr_Fences, from the SCP Wiki. Source: https://scpwiki.com/scp-548. Licensed under CC-BY-SA.

Dr. Michael Middlebrooks is an Associate Professor of Biology at the University of Tampa. Michael's research focuses on various species of sea slugs, particularly a group called the Sacaglossan sea slugs. Some of them have developed the ability to use chloroplasts from the algae they eat to become photosynthetic themselves. Michael studies how being a photosynthetic animal can change their ecology and their interactions with other organisms. He also does some work on seagrass restoration and how this affects plant-animal interactions. Scuba diving is Michael's favorite thing in the world to do, and he's able to explore the underwater world and look for cool animals both for work and in his free time. In addition, he enjoys listening to live music and reading. He received his B.S. in biology from Florida State University and his Ph.D. in Integrative biology from the University of South Florida. He remained at the University of South Florida to conduct postdoctoral research before joining the faculty at the University of Tampa. Michael was awarded the Outstanding Faculty Advisor Award from the University of Tampa as well as the University's Outstanding Student Research Supervisor Award from the College of Natural and Health Sciences there. In this interview, he shares more about his life and science.

Chlorophyll (a naturally occurring pigment involved in photosynthesis)-inspired molecules hold promise for developing next-generation light-harvesting materials. However, achieving precise control over their assembly is challenging. Researchers have now revealed that attaching dendrons - branched, tree-like structures - can aid in self-assembly of chlorophyll's materials. They found that smaller dendrons lead to stacked, fibre-like structures, while larger dendrons create spherical chlorophyll particles, advancing the development of materials that mimic the light-harvesting efficiency of natural photosynthetic systems. Researchers often look to photosynthesis - a process that turns sunlight into chemical energy in plants and bacteria - as a model for innovation. Photosynthesis is in turn linked to chlorophyll pigments, tiny green molecules that play a key role in harvesting light. Naturally, these chlorophyll molecules are organized into precise structures to optimize light absorption in plants and bacteria, and efficiently capture sunlight for energy. Inspired by this natural structure, scientists have explored ways to synthetically assemble chlorophyll-based structures for applications in optoelectronics and renewable energy. A recent study led by Professor Shiki Yagai and Mr Ryo Kudo from the Graduate School of Engineering at Chiba University in Japan, along with a team of researchers, demonstrated how modifying chlorophyll-like molecules can direct them to form distinct structural arrangements, offering insights that could transform synthetic light-harvesting materials. The study was published in Volume 11, Issue 22 of the Organic Chemistry Frontiers on October 08, 2024. "Photosynthetic bacteria utilize highly organized chlorophyll arrays, allowing them to capture light even in low-light conditions. We aimed to recreate these structures based on the identical synthetic molecular design, as comparing their photophysical properties might help us understand why such structures were selected in the course of evolution in nature, " explains Prof. Yagai. To create these structures, the team modified the chlorophyll molecule by attaching a barbituric acid unit via hydrogen bonding and further added tree-like molecular structures called "dendrons" to form stable rosette-like rings and control their hierarchical stacking. When the modified chlorophyll was dissolved in different solvents, the chlorophyll rosettes displayed a remarkable behavior. In a non-polar solvent like methylcyclohexane, chlorophyll derivatives with smaller second-generation dendrons were stacked into helical fibers, while those with bulkier, third-generation dendrons remained in smaller, disc-shaped aggregates. They could thereby assemble the chlorophyll molecules into two different forms, namely columnar stacks and discrete aggregates, mimicking the circular and tubular arrangements seen in photosynthetic bacteria. In contrast, when dissolved in chloroform, both the chlorophyll derivatives formed rosette patterns. Using advanced imaging techniques like atomic force microscopy, transmission electron microscopy, and small-angle X-ray scattering, the team characterized the unique shapes and arrangement patterns of these synthetic chlorophyll assemblies. They found that the helical fibers formed by the second-generation dendron chlorophylls exhibited a highly ordered structure, while the third-generation dendron chlorophylls displayed a more homogeneous, spherical shape. "Our findings show that subtle adjustments in molecular design can lead to significant differences in the final assembled structure of the chlorophyll, which could be exploited to create materials with specific light-harvesting properties," remarks Prof. Yagai. "These insights into controlling molecular self-assembly could ignite breakthroughs in functional materials science. We are thrilled by the potential to create materials that not only mimic but surpass the capabilities of natural photosy...

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Trace returns to find out if humans could take the green stuff from plants and make enough energy to live. meanwhile, Julian tries to understand if a wild idea would solve anything… Anything at all?QUESTIONSJulian: “What if you filled the grand canyon with ocean water? Would that solve anything?” from RomanTrace combines two questions: “What if humans performs photosynthesis?” from Danielle, with “How would society function if we were photosynthetic?” from WilliamDo you have an absurd question? Maybe it's silly idea you had, a shower thought about the nature of reality, or a ridiculous musing about your favorite food? If you want an answer, no matter the question, tell us!SPONSOR: BRILLIANT

A few weeks ago, the New Zealand Arboriculture Association stunned New Zealanders with a remarkable Tree-of-the-Year competition won by the walking tree. The magnificent Northern Rata (Metrosideros robusta) looks like it is walking on high heels (see Gareth Andrew's stunning photograph).  As it happens, this rata species belongs to the myrtle group that includes pohutukawa and many different climbing rata, as well as Southern rata and the extremely rare Bartletts rata.  I love these trees; they are endemic to New Zealand. Yes, only in New Zealand! This is where they evolved.  Some Northern Rata germinate from the ground like any other boring tree, but the majority of Northern Rata is known as a Hemi-Epiphyte (not a true strangling epiphyte that uses another tree for support and “lifestyle”).  It usually starts life from a seed that lands somewhere in the canopy of a host tree (many different tree species can be a host: from podocarps to tawa, mahoe, beech, kamahi and even tree ferns.  The magic starts when the germinated plant becomes an epiphyte (perching plant) for the beginning of its life, sending roots downwards to the ground – Takes Ages!! Often many decades. The descending roots are usually “fused” together and become a tough root system.     It also sends some shoots with leaves upward to the lighter parts of the host trees' canopy. The rata has a rather constant root-to-shoot ratio as it is growing up.  One of the roots will become dominant as it reaches the soil where the nutrients are; the shoots then have plenty of food to race up to the top of the host tree and create their own Photosynthetic factory.  Rata can be hundreds of years old – perhaps beyond 1000 years!   The original “host tree” usually dies well before the Rata is getting to its maximum size. As the host decays, the rata will “stand on its own feet” and is left with a hollow trunk – a great home for bats and native birds in the forest!  Why does this tree look like a “walking” Tree?  Look again at the picture: old, descending fused roots on the left and a rather smooth “trunk” on the right.  Rata (and pohutkawa) are able to grow new roots when and where they are needed from anywhere on the tree – and they can do so relatively quickly.  The hypothesis (proposed by my old mate Stephen King) is that the old Rata tree developed a “lean” when the old host tree perished. A new vertical root (the right one) became a smooth trunk to support the new vertical crown.  And just to make things a bit more extraordinary in the story of this walking tree: Take a look at the old fused roots on the left: This is now the spot where a pohutukawa decided to start its own life on the ancient roots of that walking Northern Rata!  If you are interested in trees and spectacular notable trees, visit the notable trees register.    More info on Rata and other Metrosideros species, cruise to the Project Crimson Website.  And grab a copy of Philip Simpson's book Pohutukawa & Rata – New Zealand's iron-hearted Trees.  LISTEN ABOVE See omnystudio.com/listener for privacy information.

You can read this post online at https://botany.one/2024/05/engineered-increase-in-mesophyll-conductance-improves-photosynthetic-efficiency-in-field-trial You can read the original research at https://doi.org/10.1111/pbi.14364

Zeakal CEO Han Chen says this can help farmers differentiate their product based on quality.

This episode, is all about clams in the subfamily tridacninae. Photosynthetic clams look stunning and otherworldly, yet their physiology is even more fascinating than their appearance. The Water Colors team covers a wide array of related topics; including the history of clam aquaculture, a brief overview of care, and a handful of species profiles. Join the discussion on the Water Colors Aquarium Gallery Podcast Listeners Facebook group: https://www.facebook.com/groups/788428861825086/ Support the show by shopping aquarium goods, merch, equipment, live plants, and more! https://watercolorsaquariumgallery.com/ Enjoying the content? Consider becoming a member on YouTube for exclusive access to livestreamed events! https://www.youtube.com/@watercolorsaquariumgallery

#149: Organic farmer and founder of the Vermont Compost Company Karl Hammer shares his vast knowledge of our agricultural and social history, in a heady conversation with his longtime friend, Real Organic Project co-director Dave Chapman. https://www.realorganicproject.org/donateKarl Hammer has been involved with rural life, horse-powered farming, and manure-based composting since his family left Manhattan for Vermont's North East Kingdom during his childhood. Since that time, his adventurous life has allowed him to found and develop several composting operations in Vermont, including the Vermont Compost Company,  whose prized organic mixes are sought after by farmers and home gardeners across the Northeast. To watch a video version of this podcast with access to the full transcript and links relevant to our conversation, please visit:https://www.realorganicproject.org/karl-hammer-imagining-photosynthetic-food-system-episode-one-hundred-forty-nineThe Real Organic Podcast is hosted by Dave Chapman and Linley Dixon, engineered by Brandon StCyr, and edited and produced by Jenny Prince.The Real Organic Project is a farmer-led movement working towards certifying 1,000 farms across the United States this year. Our add-on food label distinguishes soil-grown fruits and vegetables from hydroponically-raised produce, and pasture-raised meat, milk, and eggs from products harvested from animals in horrific confinement (CAFOs - confined animal feeding operations).To find a Real Organic farm near you, please visit:https://www.realorganicproject.org/farmsWe believe that the organic standards, with their focus on soil health, biodiversity, and animal welfare were written as they should be, but that the current lack of enforcement of those standards is jeopardizing the ability for small farms who adhere to the law to stay in business. The lack of enforcement is also jeopardizing the overall health of the customers who support the organic movement; customers who are not getting what they pay for at market but still paying a premium price. And the lack of enforcement is jeopardizing the very cycles (water, air, nutrients) that Earth relies upon to provide us all with a place to live, by pushing extractive, chemical agriculture to the forefront.If you like what you hear and are feeling inspired, we would love for you to join our movement by becoming one of our 1,000  Real Friends:https://www.realorganicproject.org/real-organic-friends/To read our weekly newsletter (which might just be the most forwarded newsletter on the internet!) and get firsthand news about what's happening with organic food, farming and policy, please subscribe here:https://www.realorganicproject.org/email/

Disclaimer: For full disclosure, Spira is a portfolio company of Climate Capital, where Michael works as a General Partner and Jenny works as a Managing Partner.CC Pod is not investment advice and is intended for informational and entertainment purposes only. You should do your own research and make your own independent decisions when considering any investment decision.Subscribe to CC Pod wherever you listen to your podcasts:In our inaugural episode of the Climate Capital podcast, we had the pleasure of hosting an insightful conversation with Elliot Roth, Founder of Spira. As a passionate entrepreneur and a visionary in the field of biotechnology, Elliot shares his journey of turning DNA into a creative medium to solve global challenges.TL;DL (too long; didn't listen):Elliot Roth is not a conventional entrepreneur. He's an extremeophile, a lover of extreme environments and complex challenges. Elliot shares how he started seven companies, ranging from a COVID diagnostic company to a dynamic wheelchair cushion, before landing on Spira. He explains his fascination with using DNA as a creative medium, shaping it like a beautifully crafted poem to solve some of the world's most urgent problems.Spira's goal is to transform conventional manufacturing and production systems, moving away from harmful petrochemicals.The conversation takes a deep dive into the world of algae and its superpowers. Elliot speaks about how Spira uses algae to create carbon-negative materials. The company's innovative approach involves genetically engineering algae and leveraging a network of farms across the world to produce these materials.One of the key lessons Elliot has learned in his entrepreneurial journey is the importance of people. He believes that the right team can make the improbable possible. He also emphasizes the significance of learning quickly and iterating over time.Elliot concludes the conversation by discussing Spira's ongoing fundraising efforts. The company is currently raising $3 million to build a Photosynthetic biofoundry, a first-of-its-kind project for the type of algae they are working with. This project will allow Spira to start biomanufacturing other compounds beyond pigments.Elliot's journey and vision serve as a powerful reminder of how innovation, coupled with the right team and relentless determination, can help us tackle some of the world's most pressing challenges.Join us in this fascinating conversation on the Climate Capital podcast, where we explore the boundaries of the possible and the future of biotechnology. Get full access to Climate Capital at climatecap.substack.com/subscribe

Join Fazale “Fuz” Rana and Hugh Ross as they discuss new discoveries taking place at the frontiers of science—discoveries that have theological and philosophical implications, including the reality of God's existence.   Lab Meat Futurists think that lab meat will soon be commercially available as an ethical and environmentally friendly alternative to meat produced from animal stocks. However, a research team from UC Davis has challenged the environmental friendliness of lab meat by arguing that the effects of making such meat from current technology are much worse for the environment than meat produced through agricultural means. In this episode, biochemist Fuz Rana discusses the pros and cons of lab meat and offers a Christian perspective on this emerging biotechnology.   References: Environmental Impacts of Cultured Meat: A Cradle-to-Gate Life Cycle Assessment Additional Resources: A Theology for Synthetic Biology, Part 1 A Theology for Synthetic Biology, Part 2   Photosynthetic Zone Four astronomers have demonstrated the necessity of the photosynthetic habitable zone for any planet thought to be a candidate for advanced life. They explain why the range of distances from a host star for a planet to conceivably harbor photosynthetic life must be narrower than the range of distances where a planet could conceivably possess surface liquid water. The team concludes that the parameter space for signs of life is far narrower than the standard HZ (liquid water habitable zone). In this episode, Hugh explains that it takes a lot of design for photosynthetic life to exist on a planet.   References: A New Definition of Exoplanet Habitability: Introducing the Photosynthetic Habitable Zone  

Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2023.06.30.547267v1?rss=1 Authors: Zamal, M. Y., Venkataramana, C., Subramanyam, R. Abstract: In the phototrophic alphaproteobacteria, photosynthesis is performed by pigment-protein complexes, including the light-harvesting complexes known as LH1 and LH2. The photosystem also encompasses carotenoids to assist in well-functioning of photosynthesis. Most photosynthetic bacteria are exposed to various abiotic stresses, and here, the Rhodobacter (R.) alkalitolerans were extracted from the alkaline pond. We report the comparative study of photosynthetic apparatus of R. alkalitolerans in various light intensities in relation to this bacterium's high pH tolerance ability. We found that as the light intensity increased, the stability of photosystem complexes decreased in normal pH (npH pH 6.8{+/-}0.05) conditions, whereas in high pH (hpH pH 8.6{+/-}0.05) acclimation was observed. The content of bacteriochlorophyll a, absorbance spectra, and circular dichroism data shows that the integrity of photosystem complexes is less affected in hpH compared to npH conditions. Sucrose density and LP-BN of photosystem complexes also shows that LH2 is more affected in npH than hpH, whereas RC-LH1 monomer or dimer has shown interplay between monomer and dimer in hpH although the dimer and monomer both increased in npH. Additionally, the phosphatidylcholine (PC) levels have increased in hpH conditions. Moreover, qPCR data showed that the subunit -c of ATPase levels was overexpressed in hpH. Consequently, the P515 measurement shows that more ATP production is required in hpH, which dissipates the protons from the chromatophore lumen. This could be the reason the photosystem protein complex destabilized due to more lumen acidification. To maintain homeostasis in hpH, the antiporter NhaD expressed more than in the npH condition. Copy rights belong to original authors. Visit the link for more info Podcast created by Paper Player, LLC

Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2023.03.27.533254v1?rss=1 Authors: Zheng, P., Kumadaki, K., Quek, C., Lim, Z. H., Ashenafi, Y., Yip, Z. T., Newby, J., Alverson, A. J., Jedd, G. Abstract: Diatoms are ancestrally photosynthetic microalgae. However, some underwent a major evolutionary transition, losing photosynthesis to become obligate heterotrophs. The molecular and physiological basis for this transition is unclear. Here, we isolate and characterize new strains of non-photosynthetic diatoms from the coastal waters of Singapore. These diatoms occupy diverse ecological niches and display glucose-mediated catabolite repression, a classical feature of bacterial and fungal heterotrophs. Live-cell imaging reveals deposition of secreted extracellular polymeric substance (EPS). Diatoms moving on pre-existing EPS trails (runners) move faster than those laying new trails (blazers). This leads to cell-to-cell coupling where runners can push blazers to make them move faster. Calibrated micropipettes measure substantial single cell pushing forces, which are consistent with high-order myosin motor cooperativity. Collisions that impede forward motion induce reversal, revealing navigation-related force sensing. Together, these data identify aspects of metabolism and motility that are likely to facilitate and underpin the transition to obligate heterotrophy. Copy rights belong to original authors. Visit the link for more info Podcast created by Paper Player, LLC

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Meet the fantastically colorful and astonishingly adaptable sea slugs that found a way to photosynthesize (or create energy from sunlight) like plants. Diving deep into these often overlooked creatures, invertebrate zoologist Michael Middlebrooks introduces the solar-powered slugs that lost their shells -- but gained the ability to directly harness the power of the sun.

Meet the fantastically colorful and astonishingly adaptable sea slugs that found a way to photosynthesize (or create energy from sunlight) like plants. Diving deep into these often overlooked creatures, invertebrate zoologist Michael Middlebrooks introduces the solar-powered slugs that lost their shells -- but gained the ability to directly harness the power of the sun.

Meet the fantastically colorful and astonishingly adaptable sea slugs that found a way to photosynthesize (or create energy from sunlight) like plants. Diving deep into these often overlooked creatures, invertebrate zoologist Michael Middlebrooks introduces the solar-powered slugs that lost their shells -- but gained the ability to directly harness the power of the sun.

Meet the fantastically colorful and astonishingly adaptable sea slugs that found a way to photosynthesize (or create energy from sunlight) like plants. Diving deep into these often overlooked creatures, invertebrate zoologist Michael Middlebrooks introduces the solar-powered slugs that lost their shells -- but gained the ability to directly harness the power of the sun.

Dr. Donald Ort is is the Robert Emerson Professor in Plant Biology and Crop Sciences at the University of Illinois and Deputy Director of the RIPE (Realizing Increased Photosynthetic Efficiency) project. His research seeks to understand and improve plant growth and photosynthetic performance in changing environmental conditions, such as increasing CO2 temperature and drought. Don earned his bachelor's degree in biology from Wake Forest University and his doctorate in plant biochemistry from Michigan State University. He has served as the president of the American Society of Plant Biologists, the International Society of Photosynthesis Research, and the International Association of Plant Physiology. He also served as editor-in-chief of Plant Physiology and is an associate editor of Annual Review of Plant Biology. Don has received numerous awards and recognitions, including election to the National Academy of Sciences and being named one of Thomson Reuters' Most Influential Scientific Minds. He has published over 250 peer-reviewed papers in journals that include Science. In this episode we discuss Dr. Ort's research and how it impacts crop production. You can learn more about RIPE at https://ripe.illinois.edu/. Dr. Ort is also involved with the Center for Advanced Bioenergy and Bioproducts Innovation (CABBI): https://cabbi.bio/ and Renewable Oil Generated with Ultra-productive Energycane (ROGUE): https://rogue.illinois.edu/.

The beautiful bark of Poison Wood, "What the sh*t is a Hardwood Hammock?", Swamp Walking, Epiphytism, KILL YOUR LAWN, Corraloid roots and why nitrogen-fiing cyanobacteria need them, Tillandsia dungeon inside a cypress dome, OOOOOOOlitic Limestone, why roots splay out and crawl along the surface (ie they're growing on bare rock and don't have soil to sink into), Silver Palms (Coccothrinax argentata), Photosynthetic roots of epiphytic orchids, etc.

"Photosynthesis is very important if you care about breathing."Half of the oxygen on the planet is produced by microbes. Dr. Awra Gabr talks about the photosynthetic Paulinella lineage of rhizarian amoebas that represent an independent acquisition of a photosynthetic organelle in eukaryotic cells. This is HUGE because this kind of event has only successfully occurred two other times in the four billions year history of life on Earth. We talk about the ins and outs of this process, why Paulinella is the most annoying organism to work with with, and I explain why half of the episodes of this podcast have been about amoebas.Dr. Arwa Gabr, Ph.D. is a graduate of the Microbiology and Molecular Genetics program at Rutgers University. You can follow her on LinkedIn and find her publications on ResearchGate.In the intro of this episode I give a kind of convoluted explanation of amoebas. Here is a link to an open access paper from 2019 about how eukaryotic life is classified. There have been other papers in the three years since that have added to this field but I like this one because Figure 2 is a great illustration of the eukaryotic tree of life and you can see where the Discoba (Percolozoa), Rhizarians, and Amoebozoa all fit (as it currently stands). https://doi.org/10.1016/j.cub.2019.07.031For more info on microbes and to follow updates of this podcast, find @couch_microscopy on Instagram, @CouchMicroscopy on Twitter, or visit www.couchmicroscopy.com/store for merch!Music is "Introducing Cosmic Space" by Elf Power and "Vorticella Dreams" by L. Felipe Benites.While some of the content on this podcast may be relevant to human or veterinary medicine, this information is not medical advice. The views and opinions expressed on this program are those of the host and guests and do not reflect the views of any institution.

Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2022.11.12.515357v1?rss=1 Authors: Kafri, M., Patena, W., Martin, L., Wang, L., Gomer, G., Sirkejyan, A. K., Goh, A., Wilson, A. T., Gavrilenko, S. E., Breker, M., Roichman, A., McWhite, C. D., Rabinowitz, J. D., Cross, F. R., Wuhr, M., Jonikas, M. C. Abstract: Photosynthesis is central to food production and the Earth's biogeochemistry, yet the molecular basis for its regulation remains poorly understood. Here, using high-throughput genetics in the model eukaryotic alga Chlamydomonas reinhardtii, we identify with high confidence (FDR less than 0.11) 70 previously-uncharacterized genes required for photosynthesis. We then provide a resource of mutant proteomes that enables functional characterization of these novel genes by revealing their relationship to known genes. The data allow assignment of 34 novel genes to the biogenesis or regulation of one or more specific photosynthetic complexes. Additional analysis uncovers at least seven novel critical regulatory proteins, including five Photosystem I mRNA maturation factors and two master regulators: MTF1, which impacts chloroplast gene expression directly; and PMR1, which impacts expression via nuclear-expressed factors. Our work provides a rich resource identifying novel regulatory and functional genes and placing them into pathways, thereby opening the door to a system-level understanding of photosynthesis. Copy rights belong to original authors. Visit the link for more info Podcast created by Paper Player, LLC

This week, Rachel rolls on in with strange tales of Tumbleweeds, Victoria thaws out a very recent (and silky) wooly mammoth and Kirk introduces us to a super cute animal with the power to photosynthesize. So much goodness here!   This episode was made possible though the support of our patrons over at patreon.com/strangebynature. Come join us!

The Photosynthetic Power of Calvary - Pastor Timothy Whiseant - 07/03/22

Algae. It's one of the greatest things on the planet and it's responsible for all life on Earth, including your life. But how much do you really know about this incredible species? Is it a plant? Why is it green? Can you eat it? Can we make it into fuel? What's up with algae blooms? Learn more in our newest episode where we talk about the benefits of algae and how it is better than human. Follow us on Twitter @betterthanhuma1on Facebook @betterthanhumanpodcaston Instagram @betterthanhumanpodcastOr email us at betterthanhumanpodcast@gmail.comWe look forward to hearing from you, and we look forward to you joining our cult of weirdness. 

SCP-243 can be found at scpwiki.com and was written by: Photosynthetic   ffodpod.com Support this show at: Patreon or Ko-Fi Or direct donation: Donate If you can't donate, leave a 5 star review I'm also on Youtube Twitch: Semiazai and Twitter: @semiazai   CC-BY-SA

While many growers are familiar with the Western Leafhopper, they may not know as much about the Virginia Creeper Leafhopper. Houston Wilson, Assistant Cooperative Extension Specialist in the Department of Entomology at UC Riverside and Director of UC Organic Agriculture Institute has been studying the Virginia Creeper Leafhopper and potential biological controls. Leafhoppers are pierce and suck feeders. The insect removes small amounts of plant material causing a stippling effect on the leaf. This damage reduces the photosynthetic capacity of the vine and can reduce yields. The Virginia Creeper Leafhopper was recently introduced into the North Coast of California where it was discovered that it has no biological controls. Additionally, its life stages are different from the more well-known Western Leafhopper so growers must utilize different management practices to control the pest. References: February 18, 2022 | Avoiding Winter Kill in Young Vineyards Webinar Cal-West Rain Houston Wilson Landscape diversity and crop vigor influence biological control of the western grape leafhopper (Erythroneura elegantulaOsborn) in vineyards Review of Ecologically-based Pest Management in California Vineyards SIP Certified UC IPM Leafhoppers

Learn why the #NoMakeup movement actually drove more makeup sales; photosynthetic frogs; and why atoms don't collapse. The #nomakeup movement is linked to a rise in makeup sales -- here's why by Steffie Drucker “Natural beauty” isn't effortless (or free). (2021). Chicago Booth Review. https://review.chicagobooth.edu/marketing/2021/article/natural-beauty-isn-t-effortless-or-free  Smith, R. K., Yazdani, E., Wang, P., Soleymani, S., & Ton, L. A. N. (2021). The cost of looking natural: Why the no-makeup movement may fail to discourage cosmetic use. Journal of the Academy of Marketing Science. https://doi.org/10.1007/s11747-021-00801-2  Jewel, A. (2020, November 10). Alicia Keys Is GLAMOUR UK's Autumn/Winter 2020 Cover Star. Glamour UK; Glamour UK. https://www.glamourmagazine.co.uk/article/alicia-keys-glamour-uk-cover-2020  Shunatona, B. (2020, January 26). Why Doesn't Alicia Keys Wear Makeup? Other Than, You Know, Because She CAN. Cosmopolitan; Cosmopolitan. https://www.cosmopolitan.com/style-beauty/beauty/a30519498/alicia-keys-no-makeup-look/  Scientists made photosynthetic frogs by Cameron Duke Incredible Creatures that Use Photosynthesis For Energy. (2014, March 9). Futurism; Futurism. https://futurism.com/photosynthetic-animals  Olena, A. (2021, October 13). Scientists Use Photosynthesis to Power an Animal's Brain. The Scientist Magazine®; The Scientist Magazine. https://www.the-scientist.com/news-opinion/scientists-use-photosynthesis-to-power-an-animal-s-brain-69307  Özugur, S., Chávez, M. N., Sanchez-Gonzalez, R., Kunz, L., Nickelsen, J., & Straka, H. (2021). Green oxygen power plants in the brain rescue neuronal activity. IScience, 24(10), 103158. https://doi.org/10.1016/j.isci.2021.103158  Why don't atoms collapse by Ashley Hamer (Listener question from Joseph in Denver, Colorado) Fermilab | Science | Inquiring Minds | Questions About Physics. (2012). Fnal.gov. https://www.fnal.gov/pub/science/inquiring/questions/bob.html  Baird, C. (2013). Why don't electrons in the atom enter the nucleus? Science Questions with Surprising Answers. https://www.wtamu.edu/~cbaird/sq/2013/08/08/why-dont-electrons-in-the-atom-enter-the-nucleus/  ‌Ethan. (2011, October 5). Music theory and quantum mechanics. The Ethan Hein Blog. http://www.ethanhein.com/wp/2011/music-theory-and-quantum-mechanics/  ‌Nicholas McKay Parry. (2021). Electron capture | Radiology Reference Article | Radiopaedia.org. Radiopaedia.org. https://radiopaedia.org/articles/electron-capture?lang=us#:~:text=Electron%20capture%20is%20the%20radioactive,neutrino%20(ve)%201.  Follow Curiosity Daily on your favorite podcast app to learn something new every day with Cody Gough andAshley Hamer. Still curious? Get exclusive science shows, nature documentaries, and more real-life entertainment on discovery+! Go to https://discoveryplus.com/curiosity to start your 7-day free trial. discovery+ is currently only available for US subscribers. See omnystudio.com/listener for privacy information.

Plant Physiology, chapter 7. Photosynthetic biochemical processes review: protein structures, organs, efficiency. Understanding of evolutionary basis for oxygenic and anoxygenic photophosporylization. --- Support this podcast: https://anchor.fm/osuz504-tech/support

Mark 4:21-23 | 10/24/2021 | Ryan Richards.

In this episode Dr Wallach discusses what he believes is behind the destruction of the Coral Reefs throughout the world and how those same processes are also affecting our health as well. Pharmacist Keith's mother-in-law, who he and his wife had been caring for in their home, had just passed away so he steps aside for the day and turns the mic over to doc. To learn more about Dr Wallach visit: http://CampaignForNutrition.com --- Send in a voice message: https://anchor.fm/askpharmacistkeith/message

Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2020.10.21.349431v1?rss=1 Authors: Gardiner, A. T., Naydenova, K., Hartmann, P. C., Nguyen-Phan, T. C., Russo, C. J., Sader, K., Hunter, C. N., Cogdell, R. J., Qian, P. Abstract: We report the 2.4 Angstrom resolution structure of the light harvesting 2 complex (LH2) from Marichromatium (Mch.) purpuratum determined by electron cryo-microscopy. The structure contains a heptameric ring that is unique among all known LH2 structures, explaining the unusual spectroscopic properties of this bacterial antenna complex. Two sets of distinct carotenoids are identified in the structure, and a network of energy transfer pathways from the carotenoids to bacteriochlorophyll a molecules is shown. The geometry imposed by the heptameric ring controls the resonant coupling of the long wavelength energy absorption band. Together, these details reveal key aspects of the assembly and oligomeric form of purple bacterial LH2 complexes that were previously inaccessible by any technique. Copy rights belong to original authors. Visit the link for more info

This episode: A probiotic can protect intestine-like cell growths from destruction by pathogens, but it can also be infected by a virus that makes it more harmful to intestinal cells! Download Episode (6.9 MB, 10.1 minutes) Show notes: Microbe of the episode: Euphorbia yellow mosaic virus   News item Takeaways There are many strains of Escherichia coli. Some are pathogenic, in the gut or the urinary tract, and a subset of those are very dangerous, such as the enterohemorrhagic O157:H7 strain. Many others are commensals, living peacefully as part of our gut community. And some strains can be beneficial to the host, protecting from and reducing the severity of disease. One such strain is called E. coli Nissle.   This study used an advanced model of human intestines called organoids, where stem cells are induced to develop into hollow spheres of intestinal epithelium in which all cell types of a normal intestinal wall are represented. E. coli pathogens typically destroy these organoids and escape from inside, but Nissle was able to prevent this destruction and enable coexistence between the pathogen and the host cells. Nissle suffered for this protection though; O157:H7 carries a toxin-encoding phage that can infect and kill susceptible E. coli strains. Those Nissle cells that survived this infection could resist the phage, but were not as beneficial to the organoids due to the toxin they now produced. Journal Paper: Pradhan S, Weiss AA. 2020. Probiotic Properties of Escherichia coli Nissle in Human Intestinal Organoids. mBio 11(4):e01470-20. Other interesting stories: Certain gut microbes can help people resist cholera Photosynthetic microbes engineered to produce spider silk   Email questions or comments to bacteriofiles at gmail dot com. Thanks for listening! Subscribe: Apple Podcasts, Google Podcasts, Android, or RSS. Support the show at Patreon, or check out the show at Twitter or Facebook.

Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2020.09.15.296665v1?rss=1 Authors: Meredith, S. A., Yoneda, T., Hancock, A. M., Connell, S. D., Evans, S. D., Morigaki, K., Adams, P. G. Abstract: The light-harvesting (LH) biomembranes from photosynthetic organisms perform solar energy absorption and transfer with high efficiency. There is great interest in the nanoscale biophysics of photosynthesis, however, natural membranes are complex and highly curved so can be challenging to study. Here we present model photosynthetic "hybrid membranes" assembled from a combination of natural LH membranes and synthetic lipids deposited into a patterned polymerized lipid template on glass. This arrangement offers many advantages over previous model systems including: a sufficiently complex mixture of natural proteins to mimic the biological processes, a modular self-assembly mechanism, and a stabilizing template promoting the formation of supported lipid bilayers from complex natural membranes with high protein content (that would not otherwise form). These hybrid membranes can be used as a platform to delineate the complex relationship between LH energy pathways and membrane organization. Atomic force microscopy and fluorescence lifetime microscopy revealed that hybrid membranes have an elongated fluorescence lifetime (~4 ns) compared to native membranes (~0.5 ns), a direct consequence of reduced protein density and an uncoupling of protein-protein interactions. We observed the real time self-assembly and migration of LH proteins from natural membrane extracts into the hybrid membranes and monitored the photophysical state of the membranes at each stage. Finally, experiments utilizing our hybrid membranes suggest that assays currently used in the photosynthesis community to test the electron transfer activity of Photosystem II may have non-specific interactions with other proteins, implying that new methods are needed for reliable quantification of electron transfers in photosynthesis. Copy rights belong to original authors. Visit the link for more info

PAR! What is PAR? PAR stands for Photosynthetically Active Radiation. Now, what is that exactly? PAR is the exact spectrum of wavelengths found in light that enables Photosynthesis. Without light, plants would have a harder time producing photosynthesis which is necessary in order for them to grow. Photosynthesis is a process used by plants, algae, and certain bacteria to use the energy provided by the sun to turn it into chemical energy. In order to discuss PAR, we're going to break down the two types of Photosynthesis as well as the spectrum of waves this process falls under. The spectrum of wavelengths is 400 -700 nanometers, now Infrared and Ultraviolet do fall above and below this spectrum however, they both hold beneficial properties for plants and many grow lights will have Infrared or Ultraviolet within their diodes. The two types of Photosynthesis are Oxygenic and Anoxygenic Photosynthesis.

Hellllllllo everybody and welcome to the best named podcast in the industry: Gamesters Pairofdice! Today on the podcast we are talking about mmgames we’ve been playing. Games today include Crystal Clans, Gears of War 4 (aka gears of four), Fractured Minds, Photosynthesis, and a whole review of Fractured But Whole. We debut a new game called Sound Game. Happy Gaming! Thank you to our Patreon Producers: Matt Arnett and Wanda! If you enjoyed the show consider becoming a patron at patreon.com/gamesterspairofdice, we have different levels of support with unique rewards. If you don’t have cash, we understand, you can still support us by giving us a quick rating on your podcast app (helps us reach more gamesters) or by reaching out to us on Instagram/Twitter: @gamestersdice. Thanks, as always to Kevin Macleod for use of Exit the Premises as our show music, to see more of his Royalty Free music visit https://incompetech.com.

Dr Nanette Boyle leads a lab which uses genetic engineering to design photosynthetic organisms capable of producing sustainable fuels and chemicals .Her most recent work has been the creation of powerful computer modelling tools which are able to predict the growth and production of these organisms. This will ultimately speed up the development of the industrial scale algae-based biofuels. Read more about her work at Research Outreach. The original research is available here.

On this week's The Sci-Files, your hosts Chelsie and Danny interview Anastasiya Lavell and Cameron De La Mora. Anastasiya is a fifth-year graduate student in the Biochemistry and Molecular Biology department. She is advised by Dr. Christoph Benning.  This summer she is working with an undergraduate student from Illinois State University, Cameron De La Mora, who came to MSU through our Plant Genomics REU program.Photosynthetic organisms are key to capturing carbon dioxide and reducing it back to a usable form for other organisms to consume. The process of capturing the energy from sunlight though is quite dangerous and complex. Protein complexes and other accessory molecules are distributed in and around the thylakoid membranes, and in plants these membranes are housed by the chloroplast. Thylakoids have a special composition of membrane lipids compared to the rest of the cell in plants and studying the way these lipids are made can inform us of their importance for the process of photosynthesis. Anastasiya is currently studying a gene in Arabidopsis thaliana, the protein product of which is found in the chloroplast. This protein seems to be important for maintaining the normal composition of acyl chains on the galactolipids found in the chloroplasts of Arabidopsis. Through traditional biochemistry and molecular biology approaches, Anastasiya is trying to pinpoint exactly how this protein is participating in chloroplast lipid biosynthesis.  Together, Anastasiya and Cameron are working to further the understanding of how this protein might act as an integral membrane protease.If you're interested in talking about your MSU research on the radio or nominating a student, please email Chelsie and Danny at scifiles@impact89fm.org. Check The Sci-Files out on Twitter @SciFiles89FM and Facebook!

This week, the Sustainable crew talks about the recent Tsunami that devastated Indonesia, the increase population of female turtles due to climbing temperatures, a Photosynthetic glitch called Rubisco and sustainable New Years Resolutions. Aired on 01/12/19

Lots of news today on the tech front as China makes some overtures to the US and Canada and India's Supreme Court upholds crop patents.For our TechTuesday interview, we talk with Dr. Paul South from the USDA-ARS about research he has been working on in helping plants overcome an issue with how they process carbon dioxide; and what that research might mean for food production in the future

In which Grace & Madz discuss photosynthetic animals (sort of) and the time it takes for most mammals to empty their bladder. For visuals, check out our Twitter @faunafactspod. --- Email: faunafactspodcast@gmail.com Theme song is "Hot Swing" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/

Thanks for listening I hope you enjoyed SCP-0799 it can be found at www.scp-wiki.net and was written by: Photosynthetic   Support this show at: patreon.com/ffodpod Or direct one-time donation: ffodpod.com/donate If you can't donate, leave a 5 star review!   Unless otherwise stated, the content of this podcast is licensed under the Creative Commons Attribution-ShareAlike 3.0 License   If you like this subscribe or find more at ffodpod.com

Wouldn't it be cool to travel across the country in mere hours? What if they made Viagra for grandmas? The guys give, Alexa, the talking box, a sex quiz. They also dive into airships, Ronald McDonald, and floating farms. Come join the guys as they talk future inventions as well as listen to, Michael Benjamin, go tantric on this all new episode of, GUY PARTY!!!

This episode: Bacteria that produce antibiotic molecule can also use it for communication between cells! Download Episode (10 MB, 11 minutes) Show notes: Microbe of the episode: Rosellinia necatrix victorivirus 1 Journal Paper: Beyersmann PG, Tomasch J, Son K, Stocker R, Göker M, Wagner-Döbler I, Simon M, Brinkhoff T. 2017. Dual function of tropodithietic acid as antibiotic and signaling molecule in global gene regulation of the probiotic bacterium Phaeobacter inhibens. Sci Rep 7:730. Other interesting stories: Bacteria may be key to certain grasses' success (paper) Small-genome bacteria have old school space-saving multi-function enzymes (paper) Using electricity to help microbes clean up pollution (paper) (see here also) Photosynthetic and non-photosynthetic organisms cooperate in ocean Phage therapy with CRISPR-modified viruses   Post questions or comments here or email to bacteriofiles at gmail dot com. Thanks for listening! Subscribe: iTunes, RSS, Google Play. Support the show at Patreon, or check out the show at Twitter or Facebook

This episode: Viruses infecting photosynthetic bacteria could transfer immunity to other viruses between their hosts! Download Episode (6.8 MB, 7.4 minutes) Show notes: News item Journal Paper: Chénard C, Wirth JF, Suttle CA. 2016. Viruses Infecting a Freshwater Filamentous Cyanobacterium (Nostoc sp.) Encode a Functional CRISPR Array and a Proteobacterial DNA Polymerase B. mBio 7:e00667-16. Other interesting stories: Salt-loving bacteria could maintain concrete structures in the ocean (paper) Ancient viral infection changed how mammals develop placentas and muscle Bees and flowers trade microbes Fungi have specific genes that help trees with drought Probiotic can affect Candida yeast's virulence (paper)   Post questions or comments here or email to bacteriofiles at gmail dot com. Thanks for listening! Subscribe: iTunes, RSS, Google Play. Support the show at Patreon, or check out the show at Twitter or Facebook

Dr. Don Bryant is the Ernest C. Pollard Professor in Biotechnology and Professor of Biochemistry and Molecular Biology at The Pennsylvania State University. Don completed his undergraduate training in Chemistry and Biology at the Massachusetts Institute of Technology and received his PhD in Molecular biology from the University of California, Los Angeles. He was awarded an NSF-CNRS Postdoctoral Fellowship to conduct research at the Institut Pasteur in France, as well as a DOE Postdoctoral Research Fellowship at Cornell University, before joining the faculty at Penn State. During his career, Don has received many awards and honors. He is a Fellow of the American Association for the Advancement of Science, a Fellow of the American Academy of Microbiology, an elected Member of the Board of Governors of the American Academy of Microbiology, as well as a Member of the Board of Directors for the Rebeiz Foundation for Basic Research. Don is here with us today to tell us all about his journey through life and science.

This episode: Fungi can act like sticky nets to help harvest algae for biofuels! Download Episode (8.3 MB, 9 minutes)Show notes:News item/Journal Paper Other interesting stories: Bacteria produce substance that could control harmful algal blooms (paper) Bacterial proteins in gut can protect mice from rotavirus Beware of contamination in microbial sequence survey studies Passionate kissing can transfer a lot of bacteria (not always a bad thing) Mouse virus can act like gut bacteria in maintaining gut health Post questions or comments here or email to bacteriofiles at gmail dot com. Thanks for listening! Subscribe at iTunes, check out the show at Twitter or Facebook

Tue, 18 Nov 2014 12:00:00 +0100 https://edoc.ub.uni-muenchen.de/18329/ https://edoc.ub.uni-muenchen.de/18329/1/Torabi_Salar.pdf Torabi, Salar Abu-Torab ddc:570, ddc:500, Fakultät für Biologie

Thu, 23 Jan 2014 12:00:00 +0100 https://edoc.ub.uni-muenchen.de/19104/ https://edoc.ub.uni-muenchen.de/19104/1/Viola_Stefania.pdf Viola, Stefania ddc:570, ddc:

The major difference between plant and animal cells is the photosynthetic process, which converts light energy into chemical energy. When light isn’t available, energy is generated by breaking down carbohydrates and sugars, just as it is in animal and some bacterial cells. Two cellular organelles are responsible for these two processes: the chloroplasts for photosynthesis and the mitochondria for sugar breakdown. New research from Carnegie’s Eva Nowack and Arthur Grossman has opened a window into the early stages of chloroplast evolution.

Thu, 22 Mar 2012 12:00:00 +0100 https://edoc.ub.uni-muenchen.de/16819/ https://edoc.ub.uni-muenchen.de/16819/1/Shao_Lin.pdf Shao, Lin ddc:

To become biologically active, a protein must fold into a distinct three-dimensional structure. Many non-native proteins require molecular chaperones to support folding and assembly. These molecular chaperones are important for de novo protein folding as well as refolding of denatured proteins under stress conditions. A certain subset of chaperones, the chaperonins, are required for the folding of the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco); furthermore, correct folding of Rubisco is also aided by the Hsp70 chaperone system. Rubisco catalyzes the initial step of CO2 assimilation in the Calvin-Benson-Bassham (CBB) cycle. Unfortunately, this enzyme is extremely inefficient, not only does it exhibit a slow catalytic rate (three CO2 molecules fixed per second per Rubisco) but it also discriminates poorly between the assimilation of CO2 and O2 to its sugar-phosphate substrate ribulose-1,5-bisphosphate (RuBP), the latter resulting in loss of photosynthetic efficiency. Due to these inefficiencies, carbon fixation by Rubisco is the rate limiting step of the CBB cycle. Photosynthetic organisms must produce tremendous amounts of Rubisco to alleviate these shortcomings; therefore significant quantities of nitrogen stores are invested in the production of Rubisco making Rubisco the most abundant protein on earth. These drawbacks of Rubisco have important implications in increasing CO2 concentrations and temperatures in the context of global warming. The ability to engineer a more efficient Rubisco could potentially reduce photosynthetic water usage, increase plant growth yield, and reduce nitrogen usage is plants. However, eukaryotic Rubisco cannot fold and assemble outside of the chloroplast, hindering advancements in creating a more efficient Rubisco. Form I Rubisco, found in higher plants, algae, and cyanobacteria, is a hexadecameric complex consisting of a core of eight ~50 kDa large subunits (RbcL), which is capped by four ~15 kDa small subunits (RbcS) on each end. The discovery of a Rubisco-specific assembly chaperone, RbcX, has lead to a better understanding of the components necessary for the form I Rubisco assembly process. RbcX is a homodimer of ~15 kDa subunits consisting of four α- helices aligned in an anti-parallel fashion along the α4 helix. RbcX2 functions as a stabilizer of folded RbcL by recognizing a highly conserved C-terminal sequence of RbcL: EIKFEFD, termed the C-terminal recognition motif. As has been demonstrated by studies of cyanobacterial Rubisco, de novo synthesized RbcL is folded by the chaperonins, whereupon RbcX2 stabilizes the folded RbcL monomer upon release from the folding cavity and then assists in the formation of the RbcL8 core. RbcX2 forms a dynamic complex with RbcL8 and as a result, RbcX2 is readily displaced by RbcS docking in an ATP-independent manner, thereby creating the functional holoenzyme. However, the exact mechanism by which RbcS binding displaces RbcX2 from the RbcL8 core is still unknown. Furthermore, though much advancement has been made in the understanding of form I Rubisco folding and assembly, an exact and detailed mechanism of form I Rubisco assembly is still lacking. The highly dynamic complex of RbcL/RbcX is critical for the formation of the holoenzyme; however it has hindered attempts to characterize critical regions of RbcL that interact with the peripheral regions of RbcX2. An important observation arose when heterologous RbcL and RbcX2 components interacted; a stable complex could form enabling in depth characterization of the RbcL/RbcX2 interaction. In the present study, the detailed structural mechanism of RbcX2-mediated cyanobacterial form I Rubisco assembly is elucidated. To obtain molecular insight into the RbcX2-mediated assembly process of cyanobacterial form I Rubisco, cryo-EM and crystallographic studies in concert with mutational analysis were employed by taking advantage of the high affinity interaction between RbcL and RbcX2 in the heterologous system (Synechococcus sp. PCC6301 RbcL and Anabaena sp. CA RbcX2). Structure guided mutational analysis based on the 3.2 Å crystal structure of the RbcL8/(RbcX2)8 assembly intermediate were utilized to determine the precise interaction site between the body of RbcL and the peripheral region of RbcX2. From these studies a critical salt bridge could be identified that functions as a guidepoint for correct dimer formation, and it was observed that RbcX2 exclusively mediates Rubisco dimer assembly. Furthermore, the mechanism of RbcX2 displacement from the RbcL8 core by RbcS binding was elucidated as well as indications of how RbcS docking on the RbcL8 core is imperative for full form I Rubisco catalytic function by stabilizing the enzymatically competent conformation of an N-terminal loop of Rubisco termed the ‘60ies loop’. Finally, initial attempts in in vitro reconstitution of eukaryotic Rubisco are reported along with the characterization of Arabidopsis thaliana RbcX2 binding to the C-terminal recognition motif of the Rubisco large subunit from various species.

Thu, 28 Jul 2011 12:00:00 +0100 https://edoc.ub.uni-muenchen.de/13994/ https://edoc.ub.uni-muenchen.de/13994/1/Qi_Yafei.pdf Qi, Yafei ddc:570, ddc:500, Faku

00:00:00 – This week on the show: The Paleopals featuring the Yeti! Sounds like a good band, right? A band of knuckleheads!   00:01:40 – Turns out some animals are stealing the limelight, literally. An oriental wasp is found to be solar charging it's yellowed-butt and a slug is eating, incorporating and reproducing stolen photosynthetic genes!   00:22:01 – What are you drinking? Taking a back seat to science but never a backseat to flavor. The Paleopals have nothing too surprising save Patrick who rolls in a PaleoPOW from Craig L. that is definitely NOT spam but can definitely be seen in the new gallery Art... sort of! 00:27:36 – Trailer Trash Talk this week is the story of something you might actually find on a trailer or in a trash heap... a tire! A tire named Robert, who has some issues with humanity in the new horror/comedy Rubber. (which was actually suggested by listener Jeff Sykes!)   00:39:09 – Eusociality is a tricky thing, so we waited for Justin to come back on and explain it to us. This new controversial paper in Nature uses math, and that's even trickier. Can't we all just agree not to breed and get along?!   00:57:35 – One group that definitely knows a thing or two about being social is the Paleoposse and this week is no exception as the Paleopals wade through the Feedback Stack! Justin has questions from Pang about self-serving science promotion. Charlie sifts out the art from the words and updates the guys on the latests offerings to the Brachiolope Gallery from SonyaB, who brings the love, Eli, who has his eye on the sky, and Adam who knows how to put a pencil to paper. Thanks guys! Finally, Ryan has an e-mail from Catherine who's upset about a kids book promoting Creationism by co-opting the awesomeness of dinosaurs. The guys discuss the vexing conundrum of science vs. nonsense. Want more? Need more? Just looking to click something? Try the Paleocave Blog! Music for this week's show: The Circle of Life - Elton John Sunshine - Ray Charles Wheel of Misfortune - Dropkick Murphys Queen Bee - Freakwater  

Fri, 19 Sep 2008 12:00:00 +0100 https://edoc.ub.uni-muenchen.de/10716/ https://edoc.ub.uni-muenchen.de/10716/1/Schwenkert_Serena.pdf Schwenkert, Serena ddc:570, ddc:500, Fakultät für Biologi

Mon, 26 May 2008 12:00:00 +0100 https://edoc.ub.uni-muenchen.de/16372/ https://edoc.ub.uni-muenchen.de/16372/1/Armbruster_Ute.pdf Armbruster, Ute ddc:570, ddc:500, Fakul

The epibiont of the phototrophic consortium “Chlorochromatium aggregatum” was isolated in pure culture. This was the first time that a symbiotic green sulfur bacterium was isolated in pure culture indicating, that the symbiosis is not an obligate one with respect to the green sulfur bacterium. The phylogenetic affiliation revealed that the epibiont belongs to the genus Chlorobium, accordingly the isolate was named Chlorobium chlorochromatii strain CaD. The cells were gram-negative, nonmotile, rod-shaped, and contained chlorosomes. Strain CaD is obligately anaerobic and photolithoautotrophic, using sulfide as electron donor. Physiologically Chlorobium chlorochromatii exhibited no conspicuous differences to free-living green sulfur bacteria. The limited number of substrates photoassimilated was the same like in other green sulfur bacteria. The pH optimum was slightly shifted to the alkaline in contrast to free-living green sulfur bacteria, which probably represents an adaptation to the symbiotic association with the central bacterium. Photosynthetic pigments were bacteriochlorophylls a and c, and γ-carotene and OH-g-carotene glucoside laurate as dominant carotenoids. The unusual carotenoid composition for green sulfur bacteria indicates a different carotenoid biosynthesis in Chl. chlorochromatii in comparison to other green sulfur bacteria. The G+C content of genomic DNA of strain CaD is 46.7 mol %. On the basis of 16S rRNA sequence comparison, the strain is distantly related to Chlorobium species within the green sulfur bacteria phylum (≤ 94.6 % sequence homology). The pure culture of Chl. chlorochromatii enabled further studies on the molecular basis of the bacterial symbiosis of “C. aggregatum”. Suppression subtractive hybridization (SSH) against 16 free-living green sulfur bacteria revealed three different sequences unique to Chl. chlorochromatii. Dot blot analysis confirmed that these sequences are only present in Chl. chlorochromatii and did not occur in the free-living relatives. Based on the sequence information, the corresponding open reading frames in the genome sequence of Chl. chlorochromatii could be identified. Whereas the large ORF Cag0616 showed rather low similarity to a hemaglutinin, ORF Cag1920 codes for a putative calcium-binding hemolysin-type protein. The gene product of ORF Cag1919 is a putative RTX-like protein. Reverse transcriptase PCR of RNA isolated from free-living and symbiotic Chl. chlorochromatii demonstrated that all three ORFs are transcribed constitutively. The C-terminal amino acid sequence of Cag1919 comprises six repetitions of the consensus motif GGXGXD and is predicted to form a Ca2+ binding beta roll structure. The RTX-type protein is most likely involved in cell-cell-adhesion within the phototrophic consortium. 45Ca autoradiography exhibited calcium-binding proteins inthe membrane fraction of Chl. chlorochromatii in the free-living as well as the symbiotic state. On the other hand, Ca2+ binding proteins were absent in the cytoplasm of Chl. chlorochromatii and in both fractions of Chlorobaculum tepidum. The proteins detected by autoradiography were considerably smaller in size than predicted from the size of ORF Cag1919. The amino acid sequence of the RTX-type C-terminus coded by Cag1919 is similar to those of a considerable number of RTX-modules in various proteobacterial proteins, suggesting that this putative symbiosis gene has been acquired via horizontal gene transfer from a proteobacterium. An improved cultivation method to selectively grow intact consortia in a monolayer biofilm was the precondition for understanding the complex interaction between epibionts and the central bacterium on the morphological basis. Therefore detailed ultrastructural investigations combining high resolution analytical SEM, TEM, 3D reconstruction and image analysis were performed to provide a structural model for phototrophic consortia. The coherence of the consortia is most likely achieved by long carbohydrate chains of lipopolysaccharides which interconnect mainly the epibionts and to some extent the central bacterium. Numerous periplasmic tubules, formed from the outer membrane of the central bacterium are in direct contact to the epibionts, resulting in a common periplasmic space which is interpreted to be important for exchange of substances. In the epibionts the attachment site to the central bacterium is characterized by absence of chlorosomes and a single contact layer (epibiont contact layer, ECL) with a thickness of 17 nm attached to the inner side of the cytoplasmic membrane of each epibiont. The ECL is also observed in pure cultures of the epibiont, however, only in about 10-20% of the cells. A striking feature of the central bacterium is the occurrence of hexagonally packed flat crystals (central bacterium crystal, CBC) which are variable in size (up to 1 μm long) and in number (statistically, 1.5 per cell), and are formed by bilayers of subunits with a spacing of 9 nm. Deducing from serial sections, the CBC is interpreted to derive from accumulation of subunits on the inner side of the cytoplasmic membrane (or membranous invaginations), first forming a monolayer (central bacterium membrane layer; CML) and subsequently forming a bilayer of 35 nm, which can be freely orientated within the cytoplasm (CBC). Comparing structural details with published data, the CBC resembles a chemosensor.

Photosynthetic organisms are able to convert light energy into chemical energy by the operation of the two photosystems, the cytochrome b6/f complex and the ATPase. The two photosystems operate in series during linear electron flow to split H2O and to generate NADP+. During electron transport, a pH gradient is generated across the thylakoid membrane which is used for the generation of ATP. In addition to the linear electron transport mode, ATP can also be produced via cyclic electron flow around photosystem I (CEF). The physiological role of CEF in vascular plants with C3-type photosynthesis is still not solved. Potential functions of CEF are (i) the dissipation of excessive light energy by increasing non-photochemical quenching (NPQ); (ii) ATP synthesis during steady-state photosynthesis; (iii) the regulation of the stromal oxidation state under stress conditions and under conditions when the Calvin cycle is not available as a sink for NADPH. With exception of the thylakoid NADPH-dehydrogenase complex and the stromal protein PGR5, the components that contribute to CEF are still unknown. Obscure is also the regulation that controls the switch from linear to cyclic flow. We have identified a novel transmembrane protein, named PPP7, which is located in thylakoids of photoautotrophic eukaryotes. Mutants lacking PPP7 exhibit the same phenotype as plants missing PGR5. These mutants show reduced NPQ, decreased P700 oxidation and perturbation of ferredoxin-dependent CEF. The work described in this thesis demonstrates that PPP7 and PGR5 interact physically, and that both co-purify with photosystem I. PPP7 does also interact in yeast assays with the cytochrome b6/f complex, as well as with the stromal proteins ferredoxin (Fd) and ferredoxin-NADPH oxido-reductase (FNR), but PPP7 is not a constitutive component of any of the major photosynthetic complexes. In consequence, the existence of a PPP7/PGR5 complex integrated in the thylakoid membrane and facilitating CEF around PSI in eukaryotes, possibly by shuttling electrons together with ferredoxin and the FNR from photosystem I to the cytochrome b6/f complex, is proposed. Moreover, CEF is enhanced in the Arabidopsis psad1 and psae1 mutants with a defect in photosystem I oxidation in contrast to the cyanobacterial psae mutant which exhibits an decreased CEF, pointing to fundamental mechanistic differences in the cyclic electron flow of cyanobacteria and vascular plants. The Arabidopsis psad1 and psae1 mutants also show higher contents of ferredoxin and of the PPP7/PGR5 complex, supporting a role of PPP7 and PGR5 in the switch from linear to cyclic electron flow depending on the redox state of the chloroplast.

Fri, 15 Dec 2006 12:00:00 +0100 https://edoc.ub.uni-muenchen.de/6315/ https://edoc.ub.uni-muenchen.de/6315/1/Piven_Irina.pdf Piven, Irina

TLP40 is the first complex immunophilin which was described from plant chloroplasts (Fulgosi et al., 1998). For this protein a role in regulation of PSII protein phosphorylation has been suggested (Fulgosi et al., 1998; Vener et al., 1999; Rokka et al., 2000). Homologous proteins were found in Arabidopsis thaliana and in Synechocystis. In Synechocystis, different from higher plants, the relevant PSII proteins are not phosphorylated. The main topic of this work was therefore to characterise the homologous protein of TLP40 in Synechocystis (named cTLP40, cyanobacterial TLP40). The investigation shows: • cTLP40 contains the major structural domains of TLP40 both at the N- and at the C-termini. A higher homology is found in the immunophilin domain located at the C-terminal end. • As in chloroplasts, cTLP40 is also located in the thylakoid lumen where it is present in free form or associated to the membrane. • A Synechocystis strain lacking cTLP40 ( ∆sll0408) could grow photoautotrophycally under normal grown conditions in a way comparable to wild-type. However, after adaptation to strong light the mutant strain showed higher photosensibility. Under these conditions, there was a decrease in oxygen evolution. • The total amount of PSII dimer was reduced in the mutant under high light. The lower amount of PSII can be attributed to a slower assembly rate of the complex and/or to higher degradation rate. Protein synthesis was not impaired under any of the tested conditions. • The PPIAse activity of cTLP40 was tested in vitro on synthetic prolinecontaining peptides of PSII proteins which are exposed to the lumenal face in thylakoids. The in vitro assays showed that cTLP40 possesses PPIAse activity on control peptides but can not efficiently isomerise the specific synthetic peptides.

The tyrosine-(M)210 of the reaction center of Rhodobacter sphaeroides 2.4.1 has been changed to a tryptophan using site-directed mutagenesis. The reaction center of this mutant has been characterized by low-temperature absorption and fluorescence spectroscopy, time-resolved sub-picosecond spectroscopy, and magnetic resonance spectroscopy. The charge separation process showed bi-exponential kinetics at room temperature, with a main time constant of 36 ps and an additional fast time constant of 5.1 ps. Temperature dependent fluorescence measurements predict that the lifetime of P* becomes 4–5 times slower at cryogenic temperatures. From EPR and absorbance-detected magnetic resonance (ADMR, LD-ADMR) we conclude that the dimeric structure of P is not significantly changed upon mutation. In contrast, the interaction of the accessory bacteriochlorophyll BA with its environment appears to be altered, possibly because of a change in its position.

Abstract A dense population of the purple sulfur bacterium Amoebobacter purpureus in the chemocline of meromictic Mahoney Lake (British Columbia, Canada) underwent consistent changes in biomass over a two year study period. The integrated amount of bacteriochlorophyll reached maxima in August and declined markedly during early fall. Bacteriochlorophyll was only weakly correlated with the light intensity and water temperature in the chemocline. In the summer, bacterial photosynthesis was limited by sulfide availability. During this period the intracellular sulfur concentration of A. purpureus cells decreased. A minimum concentration was measured at the top of the bacterial layer in August, when specific photosynthetic rates of A. purpureus indicated that only 14% of the cells were photosynthetically active. With the exception of a time period between August and September, the specific growth rates calculated from CO2 fixation rates of A. purpureus were similar to growth rates calculated from actual biomass changes in the bacterial layer. Between August and September 86% of the A. purpureus biomass disappeared from the chemocline and were deposited on the littoral sediment of Mahoney Lake or degraded within the mixolimnion. This rise of cells to the lake surface was not mediated by an increase in the specific gas vesicle content which remained constant between April and November. The upwelling phenomenon was related to the low sulfur content of A. purpureus cells and a low resistance of surface water layers against vertical mixing by wind.

Zero field absorption detected magnetic resonance hole burning measurements were performed on photosynthetic reaction centers of the bacteria Rhodobacter sphaeroides R26 and Rhodopseudomonas viridis. Extrapolation to zero microwave power yielded pseudohomogeneous linewidths of 2.0 MHz for Rhodopseudomonas viridis, 1.0 and 0.9 MHz for the protonated forms of Rhodobacter sphaeroides R26 with and without monomer bacteriochlorophyll exchanged, and 0.25 MHz as an upper limit for fully deuterated reaction centers of Rhodobacter sphaeroides R26. The measured linewidths were interpreted as being due to unresolved hyperfine interaction between the nuclear spins and the triplet electron spin, the line shape being determined by spectral diffusion among the nuclei. The difference in linewidths between Rhodobacter sphaeroides R26 and Rhodopseudomonas viridis is then explained by triplet delocalization on the special pair in the former, and localization on one dimer half on the latter. In the fully deuterated sample, four quadrupole satellites were observed in the hole spectra arising from the eight 14N nitrogens in the special pair. The quadrupole parameters seem to be very similar for all nitrogens and were determined to =1.25±0.1 MHz and =0.9±0.1 MHz. The Journal of Chemical Physics is copyrighted by The American Institute of Physics.

The primary photosynthetic reactions in whole membranes of the antenna-deficient mutant strain U43 (pTXA6–10) of Rhodobacter capsulatus are studied by transient absorption and emission spectroscopy with subpicosecond time resolution. Extensive similarities between the transient absorption data on whole membranes and on isolated reaction centers support the idea that the primary processes in isolated reaction centers are not modified by the isolation procedure.

Fri, 1 Jan 1993 12:00:00 +0100 http://epub.ub.uni-muenchen.de/2406/ http://epub.ub.uni-muenchen.de/2406/1/2406.pdf Lauterwasser, Christoph; Finkele, Ulrich; Struck, A.; Scheer, Hugo; Zinth, Wolfgang Lauterwasser, Christoph; Finkele, Ulrich; Struck, A.; Scheer, Hugo und Zinth, Wolfgang (1993): Femtosecond spectroscopy of the primary electron transfer in photosynthetic reaction centers. In: Shima, A.; Ichihashi, M.; Fujiwara, Y. und Takebe, H. (Hrsg.), Frontiers of Photobiology. Excerpta Medica: Amsterdam, pp. 209-214.

Fri, 1 Jan 1993 12:00:00 +0100 http://epub.ub.uni-muenchen.de/2365/ http://epub.ub.uni-muenchen.de/2365/1/224.pdf Scheer, Hugo; Schneider, Siegfried Scheer, Hugo und Schneider, Siegfried (1993): Photosynthetic Antenna Systems: Introduction. In: Photochemistry and Photobiology, Vol. 57, Nr. 1: p. 1. Biologie

Fri, 1 Jan 1993 12:00:00 +0100 https://epub.ub.uni-muenchen.de/3765/1/3765.pdf Kaiser, Wolfgang; Schmidt, Stefan; Hamm, P.; Finkele, Ulrich; Lauterwasser, Christoph; Zinth, Wolfgang ddc:530,

Wed, 1 Jan 1992 12:00:00 +0100 https://epub.ub.uni-muenchen.de/3764/1/3764.pdf Lauterwasser, Christoph; Finkele, Ulrich; Dressler, K.; Hamm, P.; Zinth, Wolfgang

The primary electron transfer (ET) in reaction centers (RC) of Rhodobacter sphaeroides is investigated as a function of temperature with femtosecond time resolution. For temperatures from 300 to 25 K the ET to the bacteriopheophytin is characterized by a biphasic time dependence. The two time constants of τ1=3.5±0.4 ps and τ2=1.2±0.3 ps at T=300 K decrease continously with temperature to values of τ1=1.4±0.3 ps and τ2=0.3±0.15 ps at 25 K. The experimental results indicate that the ET is not thermally activated and that the same ET mechanisms are active at room and low temperatures. All observations are readily rationalized by a two-step ET model with the monomeric bacteriochlorophyll as a real electron carrier.

Tue, 1 Jan 1991 12:00:00 +0100 https://epub.ub.uni-muenchen.de/3762/1/3762.pdf Finkele, Ulrich; Lauterwasser, Christoph; Zinth, Wolfgang

Mon, 1 Jan 1990 12:00:00 +0100 https://epub.ub.uni-muenchen.de/3755/1/3755.pdf Oesterhelt, Dieter; Zinth, Wolfgang; Lauterwasser, Christoph; Holzapfel, Wolfgang; Finkele, Ulrich; Stilz, Hans Ulrich

Sun, 1 Jan 1989 12:00:00 +0100 https://epub.ub.uni-muenchen.de/3575/1/3575.pdf Finkele, Ulrich; Holzapfel, Wolfgang; Zinth, Wolfgang

During 1986 planktonic primary production and controlling factors were investigated in a small (A0 = 11.8 · 103 m2, Zmax = 11.5 m) meromictic kettle lake (Mittlerer Buchensee). Annual phytoplankton productivity was estimated to ca 120 gC · m–2 · a–1 (1,42 tC · lake–1 · a–1). The marked thermal stratification of the lake led to irregular vertical distributions of chlorophylla concentrations (Chla) and, to a minor extent, of photosynthesis (Az). Between the depths of 0 to 6 m low Chla concentrations (< 7 mg · m–3) and comparatively high background light attenuation (kw = 0,525 m–1, 77% of total attenuation due to gelbstoff and abioseston) was found. As a consequence, light absorption by algae was low (mean value 17,4%) and self-shading was absent. Because of the small seasonal variation of Chla concentrations, no significant correlation between Chla and areal photosynthesis (A) was observed. Only in early summer (June–July) biomass appears to influence the vertical distribution of photosynthesis on a bigger scale. Around 8 m depth, low-light adapted algae and phototrophic bacteria formed dense layers. Due to low ambient irradiances, the contribution of these organisms to total primary productivity was small. Primary production and incident irradiance were significantly correlated with each other (r2 = 0.68). Although the maximum assimilation number (Popt) showed a clear dependence upon water temperature (Q10 = 2.31), the latter was of minor importance to areal photosynthesis.

The light-induced radical cation of the primary electron donor P960+• in photosynthetic reaction centers from Rhodopseudomonas viridis has been investigated by ESR, ENDOR and TRIPLE techniques. Both the comparison with the cation radical of monomeric bacteriochlorophyll b (BChl b) and with molecular-orbital calculations performed on P960+• using the results of an X-ray structure analysis, consistently show an asymmetric distribution of the unpaired electron over the two BChl b molecules which constitute P960+•. The possible relevance of this result for the primary electron transfer step in the reaction center is briefly discussed.

Fri, 1 Jan 1988 12:00:00 +0100 http://epub.ub.uni-muenchen.de/2229/ http://epub.ub.uni-muenchen.de/2229/1/2229.pdf Fischer, R.; Siebzehnrübl, S.; Scheer, Hugo Scheer, Hugo und Schneider, S. (Hrsg.) (1988): C-phycocyanin from Mastigocladus laminosus. Chromophore assignment in higher aggregates by cystein modification. Photosynthetic light-harvesting systems, 12. - 16. Oktober 1987 , Deutschland. Biologie

Reaction centers from Rhodobacter sphaeroides have been modified by treatment with sodium borohydride similar to the original procedure [Ditson et al., Biochim. Biophys. Acta 766, 623 (1984)], and investigated spectroscopically and by gel electrophoresis. (1) Low temperature (1.2 K) absorption, fluorescence, absorption- and fluorescence-detected ODMR, and microwave-induced singlet-triplet absorption difference spectra (MIA) suggest that the treatment produces a spectroscopically homogeneous preparation with one of the ‘additional’ bacteriochlorophylls being removed. The modification does not alter the zero field splitting parameters of the primary donor triplet (TP870). (2) From the circular dichroism and Raman resonance spectra in the1500–1800 cm-1 region, the removed pigment is assigned to BchlM, e.g. the "extra" Bchl on the "inactive" M-branch. (3) A strong coupling among all pigment molecules is deduced from the circular dichroism spectra, because pronounced band-shifts and/or intensity changes occur in the spectral components assigned to all pigments. This is supported by distinct differences among the MIA spectra of untreated and modified reaction centers, as well as by Raman resonance. (4) The modification is accompanied by partial proteolytic cleavage of the M-subunit. The preparation is thus spectroscopically homogeneous, but biochemically heterogenous.

Wed, 1 Jan 1986 12:00:00 +0100 http://epub.ub.uni-muenchen.de/2177/ http://epub.ub.uni-muenchen.de/2177/1/2177.pdf Steiner, R.; Kalumenos, B.; Scheer, Hugo Steiner, R.; Kalumenos, B. und Scheer, Hugo (1986): The photosynthetic apparatus of Ectothiorhodospira halochloris 3. Effect of proteolytic digestion on the photoactivity. In: Zeitschrift für Naturforschung C, Vol. 41c: pp. 873-880. Biologie

The three dimensional organization of the complete photosynthetic apparatus of the extremely halophilic, bacteriochlorophyll b containing Ectothiorhodospira halochloris has been elaborated by several techniques of electron microscopy. Essentially all thylakoidal sacs are disc shaped and connected to the cytoplasmic membrane by small membraneous ldquobridgesrdquo. In sum, the lumina of all thylakoids (intrathylakoidal space) form one common periplasmic space. Thin sections confirm a paracrystalline arrangement of the photosynthetic complexes in situ. The ontogenic development of the photosynthetic apparatus is discussed based on a structural model derived from serial thin sections.

Wed, 1 Jan 1986 12:00:00 +0100 http://epub.ub.uni-muenchen.de/2174/ http://epub.ub.uni-muenchen.de/2174/1/2174.pdf Scheer, Hugo Scheer, Hugo (1986): Excitation transfer in phycobiliproteins. In: Staehelin, L. A. und Arntzen, C.J. (Hrsg.), Photosynthesis 3: Photosynthetic membranes and light-harvesting systems. Bd. 3, Springer: Berlin u.a., pp. 327-337. Biologie

Wed, 1 Jan 1986 12:00:00 +0100 http://epub.ub.uni-muenchen.de/2176/ http://epub.ub.uni-muenchen.de/2176/1/2176.pdf Steiner, R.; Angelhofer, A.; Scheer, Hugo Steiner, R.; Angelhofer, A. und Scheer, Hugo (1986): The photosynthetic apparatus of Ecthiorhodospira halochloris 2. Accessibility of the mambrane polypeptides to partial proteolysis and antenna polypeptide assignments to specific chromophores. In: Zeitschrift für Naturforschung C, Vol. 41c: pp. 571-578. Biologie

The CD spectra of a range of antenna complexes from several different species of purple photosynthetic bacteria were recorded in the wavelength range of 190 to 930 nm. Analysis of the far UV CD (190 to 250 nm) showed that in each case except for the B800-850 from Chr. vinosum the secondary structure of the light-harvesting complexes contains a large amount of α-helix (50%) and very little 0-pleated sheet. This confirms the predictions of the group of Zuber of a high a-helical content based upon consideration of the primary structures of several antenna apoproteins. The CD spectra from the carotenoids and the bacteriochlorophylls show considerable variations depending upon the type of antenna complex. The different amplitude ratios in the CD spectrum for the bacteriochlorophyll Qy, Qx and Soret bands indicate not only different degrees of exciton coupling, but also a strong and variable hyperchromism (Scherz and Parson, 1984a, b).

Polarized spectra of absorption and light-induced absorbance changes are presented for the crystallized reaction centers of Rhodopseudomonas viridis. We find that a model based on extended dipole interaction between all six pigments is capable of interpreting detailed features such as the contributions from the individual pigments to the various absorption peaks. Even though the pigments are arranged in approximate C2 symmetry, the optical spectra together with the calculations reflect deviations from this symmetry, which may be important in understanding the electron pathway.

The photoexcited triplet state PT of Rhodopseudomonas sphaeroides R-26 has been investigated by ENDOR measurements performed on frozen photosynthetic reaction centre solutions. For the first time hyperfine data could be obtained for PT. These data indicate a delocalisation of the triplet state over two bacteriochlorophyll a molecules.

An electron spin echo envelope modulation frequency analysis is performed on the triplet state of the primary electron donor (P-860) in 14N reaction centers of the photosynthetic bacterium Rhodopseudomonas sphaeroides R26 and 15N-enriched reaction centers of Rhodopseudomonas sphaeroides 2.4.1, and of the triplet state of 14N or 15N bacteriochlorophyll a in vitro. The hyperfine previous termcouplingnext term constants for 15N 3P-860 are 1.42, 1.74 and 2.04 MHz. The triplet state of the primary donor in bacterial photosynthesis is, on a timescale of a few MHz, delocalized over the two bacteriochlorophyll a molecules making up P-860.

Fri, 1 Jan 1982 12:00:00 +0100 http://epub.ub.uni-muenchen.de/2833/ http://epub.ub.uni-muenchen.de/2833/1/060.pdf Ogrodnik, A.; Krüger, H. W.; Orthuber, H.; Haberkorn, R.; Michel-Beyerle, Maria E.; Scheer, Hugo Ogrodnik, A.; Krüger, H. W.; Orthuber, H.; Haberkorn, R.; Michel-Beyerle, Maria E. und Scheer, Hugo (1982): Recombination dynamics in bacterial photosynthetic reaction centers. In: Biophysical Journal, Vol. 39: pp. 91-99. Biologie

Thu, 1 Jan 1981 12:00:00 +0100 http://epub.ub.uni-muenchen.de/2835/ http://epub.ub.uni-muenchen.de/2835/1/050.pdf Lendzian, F.; Lubitz, Wolfgang; Scheer, Hugo; Bubenzer, C.; Möbius, K. Lendzian, F.; Lubitz, Wolfgang; Scheer, Hugo; Bubenzer, C. und Möbius, K. (1981): In Vivo Liquid Solution ENDOR and TRIPLE Resonance of Bacterial Photosynthetic Reaction Centers of Rhodopseudomonas sphaeroides R-26. In: Journal of the American Chemical Society, Vol. 103: pp

Tue, 1 Jan 1980 12:00:00 +0100 http://epub.ub.uni-muenchen.de/2824/ http://epub.ub.uni-muenchen.de/2824/1/039.pdf Michel-Beyerle, Maria E.; Scheer, Hugo; Seidlitz, H.; Tempus, W. Michel-Beyerle, Maria E.; Scheer, Hugo; Seidlitz, H. und Tempus, W. (1980): MAGNETIC FIELD EFFECT ON TRIPLETS AND RADICAL IONS IN REACTION CENTERS OF PHOTOSYNTHETIC BACTERIA. In: FEBS Letters, Vol. 110: pp. 129-132.

Mon, 1 Jan 1979 12:00:00 +0100 http://epub.ub.uni-muenchen.de/2582/ http://epub.ub.uni-muenchen.de/2582/1/028.pdf Haberkorn, R.; Michel-Beyerle, Maria E.; Scheer, Hugo; Seydlitz, H.; Tempus, W. Haberkorn, R.; Michel-Beyerle, Maria E.; Scheer, Hugo; Seydlitz, H. und Tempus, W. (1979): Time-resolved magnetic field effect on triplet formation in photosynthetic reaction centers of rhodopseudomonas sphaeroides R-26. In: FEBS Letters, Vol. 100: p

Today on Grassroots Marketing we are live at USCC Expo in Miami Florida, and we are speaking to Rebecca Knight, PhD, Technical Marketing Director for BIOS Lighting. "Rebecca is a former chemical/process engineer and R&D scientist with a Ph.D. in Plant Biology. During her dissertation, she studied the effects of environmental stimuli on photosynthetic gene expression and developed a passion for LEDs and their utilization in biological sciences. She is passionate about vertical farming, horticultural LEDs, plant secondary metabolites, and sustainable food production. As the Technical Marketing Director she is focused on finding creative ways to engage and educate the vertical farming, greenhouse, and indoor agricultural communities about photobiology. She also works closely with the engineers and scientists that make up BIOS Lighting and provides integration and cultivation expertise during regular customer site visits.