Podcasts about isotopic

TakeawaysCarnivore Ernährung wird als therapeutisches Werkzeug betrachtet.Fleisch hat eine zentrale Rolle in der menschlichen Evolution gespielt.Morphologische Anpassungen des Menschen unterstützen eine fleischbasierte Ernährung.Die Nährstoffdichte in tierischen Lebensmitteln ist höher als in pflanzlichen.Es gibt keine dokumentierten veganen Jägersammlergesellschaften.Gesättigte Fette sind in ihrer natürlichen Matrix unbedenklich.Die Inuit und andere Jägersammlergesellschaften zeigen, dass eine fleischlastige Ernährung gesund sein kann.Evidenzbasierte Ansätze sind entscheidend für die Ernährung.Kapitel00:00 - Einleitung: Ist carnivore Ernährung wirklich Unsinn? 01:00 - Fleisch und Evolution: Die Rolle der Steinwerkzeuge 02:50 - Australopithecus: Erste Hinweise auf Fleischkonsum 04:20 - Eiszeit und große Jäger: Homo erectus und die Megafauna 06:30 - Übergang zur Sesshaftigkeit: Ein langsamer Prozess 09:00 - Unsere Anatomie: Zähne, Magen und Verdauungstrakt 11:30 - Nährstoffe aus tierischer Nahrung: Hohe Dichte und Bioverfügbarkeit 13:50 - Antioxidantien, Ketose und entzündungsarme Ernährung 16:10 - Fehlende große Studien? Evidenz aus Fallstudien und Evolution 18:30 - Fazit: Fleisch als zentrales Nahrungsmittel der Menschheit Original Artikel: Iss Dich Gesund / 01-2025/ Seite 79 "Riedls Aufreger"Literaturquellen:Heinzelin, Jean de, et al. "Environment and behavior of 2.5-million-year-old Bouri hominids." Science 284.5414 (1999): 625-629.Richards, Michael P., and Erik Trinkaus. "Isotopic evidence for the diets of European Neanderthals and early modern humans." Proceedings of the National Academy of Sciences 106.38 (2009): 16034-16039.Mann, Neil. "Meat in the human diet: An anthropological perspective." Nutrition & Dietetics 64 (2007): S102-S107.Fujimori, Shunji. "Gastric acid level of humans must decrease in the future."World Journal of Gastroenterology 26.43 (2020): 6706Blumenschine, Robert J., et al. "Characteristics of an early hominid scavenging niche [and comments and reply]." Current anthropology 28.4 (1987): 383-407.Aiello, Leslie C., and Peter Wheeler. "The expensive-tissue hypothesis: the brain and the digestive system in human and primate evolution." Current anthropology (1995): 199-221.Gurven, Michael, and Hillard Kaplan. "Longevity among hunter‐gatherers: a cross‐cultural examination." Population and Development review 33.2 (2007): 321-365.Cordain, Loren, et al. "Plant-animal subsistence ratios and macronutrient energy estimations in worldwide hunter-gatherer diets." The American journal of clinical nutrition 71.3 (2000): 682-692.Lescinsky, Haley, et al. "Health effects associated with consumption of unprocessed red meat: a Burden of Proof study." Nature Medicine 28.10 (2022): 2075-2082.Astrup, Arne, et al. "Saturated fats and health: a reassessment and proposal for food-based recommendations: JACC state-of-the-art review." Journal of the American College of Cardiology 76.7 (2020): 844-857.Yamada, Satoru, et al. "Saturated Fat Restriction for Cardiovascular Disease Prevention: Systematic Review and Meta-Analysis of Randomized Controlled Trials." (2024).Beasley, DeAnna E., et al. "The evolution of stomach acidity and its relevance to the human microbiome." PloS one 10.7 (2015): e0134116.Norwitz, Nicholas G., and Adrian Soto-Mota. "Case report: Carnivore–ketogenic diet for the treatment of inflammatory bowel disease: a case series of 10 patients." Frontiers in Nutrition 11 (2024): 1467475.Calabrese, Lori, Rachel Frase, and Mariam Ghaloo. "Complete remission of depression and anxiety using a ketogenic diet: case series." Frontiers in Nutrition 11 (2024): 1396685.Cordain, Loren, et al. "The paradoxical nature of hunter-gatherer diets: meat-based, yet non-atherogenic." European journal of clinical nutrition 56.1 (2002): S42-S52.Beal, Ty, and Flaminia Ortenzi. "Priority micronutrient density in foods." Frontiers in nutrition 9 (2022): 806566.Ben‐Dor, Miki, Raphael Sirtoli, and Ran Barkai. "The evolution of the human trophic level during the Pleistocene." American journal of physical anthropology 175 (2021): 27-56. Bitte beachte auch immer den aktuellen "Haftungsausschluss (Disclaimer) und allgemeiner Hinweis zu medizinischen Themen" auf meiner Webseite.

News items read by Laura Kennedy include: Analysis of America's oldest tombstone illuminates colonial era trade networks (details) South African rock art may depict animal that went extinct before dinosaurs (details) (details) Mystery man interred under Notre-Dame nave was noted French poet (details) Isotopic and stylistic analysis reveals The Lion of Venice's Chinese origins (details) å

In a recent study, researchers found that the diet of some ancient hunter-gatherers primarily ate plant foods, including beans and grains, with only a small percentage of meat in their diet. This new understanding contrasts with the meat-centric modern Paleo diet. Listen in this week as Dee discusses the findings of the study, and what it means for your health.References:Moubtahij, Z., McCormack, J., Bourgon, N., Trost, M., Sinet-Mathiot, V., Fuller, B. T., Smith, G. M., Temming, H., Steinbrenner, S., Hublin, J.-J., Bouzouggar, A., Turner, E., & Jaouen, K. (2024). Isotopic evidence of high reliance on plant food among later Stone age hunter-gatherers at Taforalt, Morocco. Nature Ecology & Evolution, 8(5), 1035–1045. https://doi.org/10.1038/s41559-024-02382-z 

Welcome to Bench Boost by Inorganic Ventures, the ultimate podcast for analytical chemists! Join Mike, our host and Technical Director, as he chats with some of our experts about the eleventh chapter of our ICP Operations Guide, Standard Addition, Internal Standardization, and Isotopic Dilution.If you would like to follow along with us you can view the ICP Operations Guide on our website.Join us next week as we tackle Chapter 12, Common Problems with Hg, Au, Si, Os, and Na.For more on-demand learning, explore our new virtual ICP academy, IV Ignite, for video courses, downloadable resources, community forums, and so much more.

Olá, bio-ouvinte! Chegamos com a sequência da nossa conversa sobre o universo da Paleontologia, desta vez com foco na Paleoecologia e Conservação. Vocês sabiam que os fósseis só são considerados assim se datarem de mais de 10 mil anos? E que Menos que isso ainda é considerada história recente? Nesse episódio você vai entender mais sobre as relações entre seres vivos já extintos e o meio ambiente dos tempos passados.   CONTATOS cartinhas@biologiainsitu.com.br Instagram, Facebook e LinkedIn: @biologiainsitu Twitter e TikTok: @bioinsitu APOIO Apoie pela Orelo em "Fazer parte"! Pix: cartinhas@biologiainsitu.com.br CRÉDITOS Coordenação: Bruna Canellas, Cristianne Santos, Heloá Caramuru, Ricardo Gomes e Vitor Lopes. Pesquisa de pauta: Alice Campos e Valtenisa Andrade. Revisão científica: Isabela Mayara e Nadja Lopes. Roteirização: Ana Victória. Revisão textual: Sueli Rodrigues. Locução: Raissa Bella e Ricardo Gomes. Direção: Vitor Lopes. Edição e mixagem de áudio: Felipe Castro. Arte de capa: Larissa Castro.   REFERÊNCIAS BENTON, M.J. Studying function and behavior in the fossil record. PLoS Biology, v. 8, n. 3, p. e1000321, 2010. CISNEROS, Juan Carlos; AURELIANO, Aline Ghilardi And; GHILARDI, Aline; et al. Colecionadores de Ossos. Unicamp.br. Disponível em: . Acesso em: 17 mar. 2023. CISNEROS, Juan Carlos. Colecionadores de Ossos. Unicamp.br. Disponível em: . Acesso em: 15 mai. 2023. DANTAS, M.A.T.; CHERKINSKY, A.; BOCHERENS, H.; DREFAHL, M.; BERNARDES, C.; FRANÇA, L.M. Isotopic paleoecology of the Pleistocene megamammals from the Brazilian Intertropical Region: Feeding ecology (δ13C), niche breadth and overlap. Quaternary Science Reviews, v. 170, p. 152-163, 2017. HABITAT. Episódio 1: O mundo antes do mundo. Entrevistadas: Ana Bottallo e Aline Ghilardi. Entrevistadoras: Jéssica Maes e Natália Silva. São Paulo: Folha de S. Paulo - Habitat, set. 2021. Podcast. Disponível em: https://open.spotify.com/episode/2u8QnArIg5N1uTSXIPHMdJ?si=7ebead6ebd6643f4. Acesso em: 07 abr. 2023. LIMA, R. J. C.; SARAIVA, A. A. F.; LANFREDI, S.; NOBRE, M. A. L.; FREIRE, P. T. C.; SASAKI, J. M. Caracterização espectroscópica de peixe do Período Cretáceo (Bacia do Araripe). Quim. Nova, Vol. 30, No. 1, 22-24, 2007a. Disponível em: https://www.scielo.br/j/qn/a/KPfG86dBQv3ZcKfgn8mDhDG/abstract/?lang=en. Acesso em: 29 abr. 2023. LIMA, R. J. C.; FREIRE, P. T. C.; SASAKI, J. M.; SARAIVA, A. A. F.; LANFREDI, S.; NOBRE, M. A. L. Estudo de coprólito da Bacia Sedimentar do Araripe por meios de espectroscopia FT-IR e difração de raios-X. Quim. Nova, Vol. 30, No. 8, 1956-1958, 2007b. Disponível em: https://www.scielo.br/j/qn/a/N4V5BVQhb3SZX4Vqcf9M3yC/abstract/?lang=en. Acesso em: 29 abr. 2023. MACHADO, Ana Carolina Ferreira; SANTOS, Verônica Soares dos; SOUZA, Juliane Marques de; et al. A importância do estudo dos fósseis para compreensão da história e preservação da vida na terra: Revista Insignare Scientia - RIS, v. 2, n. 2, p. 204–220, 2019. Disponível em: . Acesso em: 11 mar. 2023. PAÍS, El. Heineken desiste de construir fábrica perto de sítio arqueológico em Minas Gerais. Ediciones EL PAÍS S.L. Disponível em: . Acesso em: 18 mar. 2023. RENAN, J. M. S.; BANTIM, A. M. A paleontologia no século XXI: novas técnicas e interpretações. Ciência e Cultura, vol.67 no.4, São Paulo, 2015. DOI: 10.21800/2317-66602015000400015. Disponível: http://cienciaecultura.bvs.br/scielo.php?script=sci_arttext&pid=S0009-67252015000400015. Acesso em: 26 abr. 2023. RULL, V. Ecology and palaeoecology: two approaches, one objective. The Open Ecology Journal, v. 3, p. 1-5, 2010. Disponível em: https://benthamopen.com/contents/pdf/TOECOLJ/TOECOLJ-3-2-1.pdf. Acesso em: 25 abr. 2023. SILVA, R. S.; GARCIA, M. J.; SANTOS, R. A.; OLIVEIRA, P. E.; GIANNINI, P. C. F.; BERNARDES-DE-OLIVEIRA, M. E.; MEDEIROS, V. B.; BISTRICHI, C. A.; FERNANDES, R. S.; RACZKA, M. F. O significado paleoambiental de palinomorfos de fungos em turfas quaternárias do Médio Vale do Rio Paraíba do Sul, SP, Brasil. Revista do Instituto Geológico, São Paulo, 36 (2), 1-24, 2015. DOI: 10.5935/0100-929X.20150005. Disponível: file:///C:/Users/Alice/Downloads/10019-11789-1-PB.pdf. Acesso em: 30 abr. 2023. UNESP. Paleontologia / Paleobiologia, você já pensou nisso? Museu de Paleontologia e Estratigrafia “Prof. Dr. Paulo Milton Barbosa Landim”, [s.d.]. Disponível em: http://www1.rc.unesp.br/museupaleonto/paleonto.htm. Acesso em: 15 abr. 2023.VEIGA, I.M.M.G.; MELKI, L.B. Um Panorama Atual da Paleoecologia de Vertebrados no Brasil. Biosphere Comunicações Científicas, 1 (1), p.9-20, 2022.

Water is critical for human development and environmental and economic sustainability. Isotopic techniques are used to help assess the quantity, quality and sustainability of this precious resource. Isotope hydrology is a nuclear technique that uncovers how water moves through the land, ocean and atmosphere. This technique provides data to facilitate informed decision making to address water management challenges.

CHEMOUT: CHEMical complexity in star-forming regions of the OUTer Galaxy III Nitrogen isotopic ratios in the outer Galaxy by L. Colzi et al. on Thursday 22 September Nitrogen isotopic ratios are a key tool for tracing Galactic stellar nucleosynthesis. We present the first study of the $^{14}$N/$^{15}$N abundance ratio in the outer regions of the Milky Way (namely, for galactocentric distances, $R_{rm GC}$, from 12 kpc up to 19 kpc), with the aim to study the stellar nucleosynthesis effects in the global Galactic trend. We analysed IRAM 30m observations towards a sample of 35 sources in the context of the CHEMical complexity in star-forming regions of the OUTer Galaxy (CHEMOUT) project. We derived the $^{14}$N/$^{15}$N ratios from HCN and HNC for 14 and 3 sources, respectively, using the $J$ = 1-0 rotational transition of HN$^{13}$C, H$^{15}$NC, H$^{13}$CN, and HC$^{15}$N. The results found in the outer Galaxy have been combined with previous measurements obtained in the inner Galaxy. We find an overall linear decreasing H$^{13}$CN/HC$^{15}$N ratio with increasing $R_{rm GC}$. This translates to a parabolic $^{14}$N/$^{15}$N ratio with a peak at 11 kpc. Updated Galactic chemical evolution models have been taken into account and compared with the observations. The parabolic trend of the $^{14}$N/$^{15}$N ratio with $R_{rm GC}$ can be naturally explained (i) by a model that assumes novae as the main $^{15}$N producers on long timescales ($ge$1 Gyr) and (ii) by updated stellar yields for low- and intermediate-mass stars. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.10620v1

Presolar Silicon Carbide Grains of Types Y and Z: Their Strontium and Barium Isotopic Compositions and Stellar Origins by Nan Liu et al. on Wednesday 21 September We report the Sr and Ba isotopic compositions of 18 presolar SiC grains of types Y (11) and Z (7), rare types commonly argued to have formed in lower-than-solar metallicity asymptotic giant branch (AGB) stars. We find that the Y and Z grains show higher 88Sr/87Sr and more variable 138Ba/136Ba ratios than mainstream (MS) grains. According to FRANEC Torino AGB models, the Si, Sr, and Ba isotopic compositions of our Y and Z grains can be consistently explained if the grains came from low mass AGB stars with 0.15 Zsun

How do geochemists study the chemical composition of earth? How do geochemists better our understanding of the earth's interior, natural resources, climate change, human impacts on the environments, and hazards like earthquakes, tsunamis and volcanoes? Dominique Weis is a professor in the UBC Department of Earth, Ocean, and Atmospheric Sciences at the University of British Columbia. She is a renowned leader in the application of trace elements and radiogenic isotopes analysis. Her analytical insight has enabled new discoveries into Earth systems such as mantle plumes and hotspot volcanoes. Through the analysis of a wide range of materials such as honey, salmon, or belongings, her expertise allows the opening of new lines of research into health, local pollution/food security, and archeology/Indigenous-led studies. She is a Canada Research Chair in the Geochemistry of the Earth's mantleFor more information on Dominique Weis's research, visit: https://www.eoas.ubc.ca/people/dominiqueweisand the Pacific Centre for Isotopic and Geochemical Research at: https://pcigr.eos.ubc.caAudio Played:"An Isotopic Talk and Tour: The Pacific Centre for Isotopic and Geochemical Research" produced by PCIGR"Clair Patterson The Clean Room: Inside Look | Cosmos: A Spacetime Odyssey" Produced by National Geographic

What's all the buzz about? This week Alastair interviewed Dr. Dominique Weis and Kate Smith from the Pacific Centre for Isotopic and Geochemical Research about their work on lead isotope ratios. What has this got to do with the bees? Listen now to find out!   https://linktr.ee/notyetadr   Edited by: Sienna   Questions or Suggestions? Email us at phd32b@gmail.com

DR JOHN ANTON, Forensic Geologist, Rutgers, BA, Temple, MA, CUNY, PhD, Explorer, Researcher, Author Oct 14 2020 Dr. John Anton, Forensic Geologist, Rutgers, BA, Geology, Temple, MA, Geology (Geochemistry, Paleontology) CUNY, PhD, Geology, Explorer, Researcher, Author, Artist CONTACT: Enviroforensic & Geoscience Services, Inc Antongeoforensics@gmail.com Licensed professional geologist, explorer, environmental and forensic geologist expert witness for litigations and cost recovery matters (see job description below), adjunct university professor, outdoorsman, geochemist, naturalist; dinosaur paleontologist; ecological, archaeological, meteorite (cosmochemistry), global warming (climate) researcher; consultant and lecturer. Open to discuss potential collaboration regarding geological, dinosaur, cosmochemical, archaeological, and gold prospecting research and/or exploration. Television appearances. Science documentaries. Invited speaker - radio. Technical/scientific advisor for media productions. Ph.D. Earth and Environmental Sciences. Isotopic cosmochemistry - meteorites. Best seller author and illustrator (Dinosaurs Incognito); publisher of technical papers (i.e., dinosaurs, geology, glaciology/global warming, biomes/ecosystems, and environmental forensics) for journals, texts and encyclopedias. Adjunct professor. Created and/or taught geology, natural history, dinosaur, astronomy, physical geography, and environmental courses. Guest lecturer. Global Research Library Advisory Board Member. State-approved environmental forensics course instructor for attorneys (NJ-CLEs). Licensed Professional Geologist - Tennessee and Indiana Holds a Certificate of Eligibility for New Jersey Public School Systems - Earth Science Artist/illustrator/photographer: natural systems (terrestrial/aquatic), flora and fauna (see examples). Specialties: Natural history. Lead scientist on local and overseas archaeological sites. Physical sciences. Expert witness/Forensics (environmental litigations). Dinosaur paleontology. Proposed new dinosaur theories regarding ceratopsian acoustics and metabolism. Tundra exploration - northern Alaska. Performed isotope studies in meteorites to promote our understanding of early Solar System conditions and modes of planetary formation; southwestern Greenland/Antarctica research, specifically, cryoconite impacts on glacial losses (e.g., global warming). Depositional/structural bedrock reconstructions via rock core analyses and geophysics data.

Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2020.10.28.358432v1?rss=1 Authors: Akram, S., Thakur, J., Shree, M., Masakapalli, S. K., Nanda, R. K. Abstract: In vitro studies involving cell lines or primary cells, provide critical insights into their physiology under normal and perturbed conditions like cancer and infection. Given that there are multiple sources of carbon, nitrogen, and other nutrients available in routinely used standard media (such as DMEM, RPMI), it is vital to quantify their contribution to cellular metabolism. 13C based Isotopic tracers of the media components can be used to kinetically track their oxidation by the cell systems such as Human Lung Carcinoma (A549) cells. In this study, a universally labelled glucose tracer ([13C6]glucose) was used to quantify its metabolic contribution that provided further insights into the central carbon metabolism of A549 cells. Gas chromatography and mass spectrometry (GC-MS) based mass isotopomer analysis (average 13C) of methanolic extracts (glycerol: 5.46{+/-}3.53 % and lactate: 74.4{+/-}2.65 %), amino acids derived from acid hydrolysates of protein (Serine: 4.51{+/-}0.21 %, Glycine: 2.44{+/-}0.31 %, Alanine: 24.56{+/-}0.59 %, Glutamate: 8.81{+/-}0.85 %, Proline: 6.96{+/-}0.53 % and Aspartate: 10.72{+/-}0.95 %) and the metabolites of the culture filtrate (glycerol: 43.14{+/-}1.45 % and lactate: 81.67{+/-}0.91 %), allowed to capture the relative contribution of glucose. We observed the Warburg effect and a significant amount of lactate contributed from glucose, was released to the media. 13C glycerol of glucogenic origin was kinetically released to the culture filtrate and might be playing a critical role in metabolic reprogramming of A549 cells. Part of the protein biomass contributed from amino acids were of glucogenic origin. Besides, the workflow adopted for 13C analysis and derived average 13C of each metabolite provided a standard methodology that could be useful in defining the metabolic phenotypes of cells in normal and perturbed conditions. Understanding precisely the altered cellular metabolism to meet the biomass demand under a range of physiological conditions, kinetically, may identify pathways for targeted and effective therapeutic interventions. Copy rights belong to original authors. Visit the link for more info

Link to bioRxiv paper: http://biorxiv.org/cgi/content/short/2020.10.07.330530v1?rss=1 Authors: Ellis, S. R., Halll, E., Panchal, M., Flinders, B., Madsen, J., Koster, G., Heeren, R. M. A., Clark, H. W., Postle, A. D. Abstract: Mass spectrometry imaging (MSI) visualises molecular distributions throughout tissues but is blind to dynamic metabolic processes. Here, MSI with high mass resolution together with multiple stable isotope labelling provided spatial analyses of phosphatidylcholine (PC) metabolism in mouse lungs. Dysregulated surfactant metabolism is central to many respiratory diseases. Metabolism and turnover of therapeutic pulmonary surfactants were imaged from distributions of intact and metabolic products of an added tracer, universally 13C-labelled dipalmitoyl PC (U[13C]DPPC). The parenchymal distributions of newly synthesised PC species were also imaged from incorporations of methyl-D9-choline. This dual labelling strategy demonstrated both lack of inhibition of endogenous PC synthesis by exogenous surfactant and location of acyl chain remodelling processes acting on the U[13C]DPPC-labelled surfactant, leading to formation of polyunsaturated PC lipids. This ability to visualise discrete metabolic events will greatly enhance our understanding of lipid metabolism in diverse tissues, and has potential application to both clinical and experimental studies. Copy rights belong to original authors. Visit the link for more info

When not one, but two 8th century mass graves emerged on the beaches of Salme in Saaremaa, Estonia, it marked a new chapter in scholarly inquiry into the Viking Era. Thoughtfully propped up in two military rowing vessels, sitting side by side, and stacked on top of each other, respectively, these 40 or so Scandinavian raiders received graves as shallow as they were ritualistic. The finds brought renewed interest in the historical origins of viking piracy. A culture that came of age with the professionalization of the Germanic warband in the Roman Iron Age, which led to the emergence of a self-insistent aristocratic class, who built their identity around war, feasting, and huge halls. But their primitive adolescence goes even further back, to a dim past of steppe raiding-economies, and eerie coming of age rituals. And yet, one may discern the glimmer of an influence not quite of this world, of a new religion with the promise of a shimmering afterlife in the presence of the Lord. In this episode, Brute Norse attempts to trace the idea of Valhalla, from the darkest of pasts, to the light in the end of the tunnel. Hail Herjan! Hail Wodanaz! Looking for rad Scandifuturist fashion, or anything else Brute Norse related? Look no further: https://linktr.ee/brutenorse Some sources, reading, and mentions for this episode: - Kershaw, Priscilla (2000). The One-eyed God: Odin and the (Indo-) Germanic Männerbünde. Journal of Indo-European studies Monograph No. 36. - Ligotti, Thomas (2010). The Conspiracy Against the Human Race. Viking Press: New York. - Meulengracht Sørensen, Preben (1983). The Unmanly Man: Concepts of Sexual Defamation in Early Northern Society. Odense University Press. - Moynihan, Michael (2017). From Householder to War-Lord to Heavenly Hero: Naming God in the Early Continental Germanic Languages. University of Massachussets Amherst. - Nordberg, Andreas (2004). Krigarna i Odins sal. Dödsföreställningar och krigarkult i fornnordisk religion. University of Stockholm. - Opedal, Arnfrid (1998). De glemte skipsgravene: makt og myter på Avaldsnes. Arkeologisk museum i Stavanger. - Price, Douglas et. al. (2016). Isotopic provenancing of the Salme ship burials in Pre-Viking Age Estonia. Antiquity, 90. Cambridge Journals: Cambridge. - Russel, James C. (1996). The Germanization of Early Medieval Christianity. Oxford University Press. - Ystgaard, Ingrid (2014). Krigens praksis: Organisert voldsbruk og materiell kultur i Midt-Norge ca. 100-900 e.kr. NTNU.

A screencast from Chapter 2 Part 1 in CH 221 which looks at isotopic abundance and methods to calculate it. https://mhchem.org/221/classroom/zAudio/Ch02IsotopicAbundance.mp4

Guest: Dominique Weis Senior author Director of UBC's Pacific Centre for Isotopic and Geochemical Research

Chapter 1

Alright we have a special episode today. We’re lucky to hear all about Miki’s new paper looking at the complete story of our dietary past and humans being high-trophic level carnivores. He gave me a sneak peak at this awesome 40 page paper he’s submitting for review. Miki Ben-Dor got an undergraduate and masters degree in economics and then went back to school later in life to study paleoanthropology. He’s now Post doctoral fellow at the department of archeology of Tel Aviv University.  You can find some great presentations on youtube and his paper “Man the Fat Hunter” published in 2011. Love the work he’s done - he’s hit it from all angles and it all lines up. We ate meat for all of human history. Ok here’s a bit of business to take care of - Let’s see how concise we can make this. Get your own grass finished meat at Nose to tail.org. Support the show on Patreon at patreon.com / peak human. Preorder the film at FoodLies.org. Watch highlights from the film on the Food Lies youtube. Get daily content on the Food Lies instagram, twitter, and facebook. SIgn up for the newsletter on Sapien.org. Get on the waiting list if your a health coach, doctor, or other healthcare practitioner at sapien.org. I think there’s too many things at this point. Maybe just pick 1 of these and go for it. I really appreciate it. At this point we’re a community powered company. We’re scrambling around here at SAPIEN trying to make this all happen without outside money or influence. Really love this tribe. We can’t go back to the glory days thrusting spears at wooly mammoth and gorging on fatty meat, but we can still try to bring the community together and spread the word and focus on our own health and people around us. Now let’s hear from Miki Ben-Dor   BUY THE MEAT http://NosetoTail.org Support me on Patreon! http://patreon.com/peakhuman Preorder the film here: http://indiegogo.com/projects/food-lies-post Film site: http://FoodLies.org   SHOW NOTES Miki completed his undergrad and masters in economics and switched later in life into paleo anthropology His research is largely focused on the reconstruction of the human diet and the relationship between plant vs animal foods and the proportion of each as far back as 2 million years ago If we want to understand human evolution we have to go much further back than just modern hunter gatherers  Gut morphology similar to carnivores When we compare humans to chimpanzees, Miki has calculated that to be 77% smaller colon and about 60% longer small intestine which is exactly the direction of carnivores  The size of our stomachs is another cue Gut pH is very convincing too since herbivores have a more basic stomach pH whereas omnivores have more acidic and carnivores have very acidic stomachs and scavengers have the most acidic, humans are most similar to scavengers  The size and number of human adipocytes is closely related to carnivores vs herbivores One of the main differences between their diets and today’s diets is bone marrow, Miki believes our ancestors ate a lot of bone marrow and had the ability to break bones which appeared broken to get the marrow  Liver is also the first thing that humans would go for when they killed their prey  The evolution of the Savannah vs forest and how this changed the diet  It’s easier to hunt larger animals than smaller animals  Humans ate plants for all of history, there is no question that we ate them, the only question is how much  Hypercarnivore is defined as a carnivore that eats 70-80% of energy from animals and the rest from plants  If you want to be safe, eat 80% from fat and meat  Using the Hadza to reconstruct the human diet is completely inaccurate  You also can’t use modern hunter gatherers to see what our ancestors ate  Everytime we find plant matter in human remains, everyone celebrates but it doesn’t tell us anything about how much they ate  Isotopic discoveries are more reliable than archeology and definitely shows that we are mostly carnivorous Humans do not want to spend energy gathering plants when they can spend that energy hunting animals Humans have higher fat reserves than other animals which allowed us to get through periods of starvation and we can afford to because we don’t chase or escape we don’t need to be fast All large carnivores eat large animals and are hypercarnivores  Miki thinks we spread across the globe because we can hunt animals of any size, with plants you have to use trial and error and adjust to them  Wherever humans went, these large animals decreased and that humans could have been the reason for the decrease in megafauna Domesticating plant foods and animals was about 10,000 years ago  As we approach agriculture revolution we started eating more plant foods but our stature also decreased and our brain size decreased  Fat was prized for all of history and plants are fallback foods He tried to find evidence for plants in the human diet and couldn’t, all his evidence showed was that humans were carnivores  Papers showing mixed diets are misleading and these scientists are not reporting proper evidence   http://paleostyle.com http://twitter.com/bendormiki   BUY THE MEAT http://NosetoTail.org Support me on Patreon! http://patreon.com/peakhuman Preorder the film here: http://indiegogo.com/projects/food-lies-post Film site: http://FoodLies.org   Follow along: http://twitter.com/FoodLiesOrg http://instagram.com/food.lies http://facebook.com/FoodLiesOrg http://youtube.com/c/foodlies   Theme music by https://kylewardmusic.com/

UBC scientists have teamed up with honeybees to map pollution across Metro Vancouver. Guest: Dominique Weis Senior author Director of UBC's Pacific Centre for Isotopic and Geochemical Research

Chapter 1

Measurements of sulphur isotopes in presolar grains can help to identify the astrophysical sites in which these grains were formed. A more precise thermonuclear rate of the 33S(p, γ)34Cl reaction is required, however, to assess the diagnostic ability of sulphur isotopic ratios. We have studied the 33S(3He,d)34Cl proton-transfer reaction at 25MeV using a high-resolution quadrupole–dipole–dipole–dipole magnetic spectrograph. Deuteron spectra were measured at ten scattering angles between 10◦and 55◦. Twenty-four levels in 34Cl over Ex=4.6–5.9MeVwere observed, including three levels for the first time. Proton spectroscopic factors were extracted for the first time for levels above the 33S+p threshold, spanning the energy range required for calculations of the thermonuclear 33S(p, γ)34Cl rate in classical nova explosions. We have determined a new 33S(p, γ)34Cl rate using a Monte Carlo method and have performed new hydrodynamic nova simulations to determine the impact on nova nucleosynthesis of remaining nuclear physics uncertainties in the reaction rate. We find that these uncertainties lead to afactor of ≤5variation in the 33S(p, γ)34Cl rate over typical nova peak temperatures, and variation in the ejected nova yields of S–Ca isotopes by ≤20%. In particular, the predicted 32S/33S ratio is 110–130 for the nova model considered, compared to 110–440 with previous rate uncertainties. As recent type II supernova models predict ratios of 130–200, the 32S/33S ratio may be used to distinguish between grains of nova and supernova origin.

Isotopic analysis of water trapped in volcanic glass in lunar samples show that the moon has more water than thought, and the water there and on Earth had the same origins. Karen Hopkin reports

Painstaking studies of his “hexaphenylethane” and its reactivity convinced Gomberg that he had prepared the first trivalent carbon compound, triphenylmethyl radical, the discovery of which marked the emergence of fundamental organic chemistry in America. Isotopic labeling could decide whether protonated cyclopropane plays a role in Friedel-Crafts alkylation. C-13 NMR spectra of aldehydes and ketones show how characteristic chemical shifts are established empirically. The carbonyl group is thermodynamically stable but kinetically reactive. Its acid- and base-catalyzed reactions often involve loss of an [gr]α-proton to form an enol or enolate intermediate. Carboxylic acids display four fundamentally different reaction patterns. Acid-catalyzed hydrolysis of acetals illustrates a multistep reaction mechanism involving the carbonyl group. Complete course materials are available at the Open Yale Courses website: http://oyc.yale.edu This course was recorded in Spring 2011.

This video is part of a 28-lecture graduate-level course titled "Organic Spectroscopy" taught at UC Irvine by Professor James S. Nowick. The course covers infrared (IR) spectroscopy, mass spectrometry, and nuclear magnetic resonance (NMR) spectroscopy, the latter of which is the main focus. Topics covered in the NMR spectroscopy part of the course include chemical shifts, spin-spin coupling, dynamic effects in NMR spectroscopy, and 2D NMR spectroscopy (COSY, HMQC, HMBC, TOCSY, NOESY, ROESY).

A screencast from Chapter 2 Part 1 in CH 221 which looks at isotopic abundance and methods to calculate it.

Associate Professor Kendal McGuffie from the Physics department at UTS, tells Ian Woolf about tracking the movement of water by weight to find out how forests use water and effect the climate. Marc West phones Dr Christopher Pettigrew from Cork University in Ireland to find out how to apply for the American Association for the Advancement of Science PhD interprative dance competition. Kalvin Ng bring us the latest news about bird flu. Presented by Kalvin Ng and produced by Ian Woolf.

The Antarctic Peninsula forms part of a magmatic arc at least since Jurassic times. Magmatic dykes are essential elements of such arcs and intrude along zones of instability. In contrast to other hypabyssal intrusions and the effusive products of arc activity, dykes do not only reflect the geochemical characteristics of their magma source but also the tectonic parameters at the time of their emplacement. The South Shetland Islands form an archipelago located at the northern tip of the Antarctic Peninsula and belong to this arc. Areas of up to 100,000 m2 have been mapped at several locations of these islands, mainly on King George and Livingston Island. A structural analysis of the dykes and the host rocks was carried out, and about 250 dykes were sampled for further studies. As deduced from field relationships, on Livingston Island six different intrusive events could be distinguished, on King George Island up to seven. This subdivision into different intrusive events is also well reflected by the geochemical data. Analysis of the structural data of the dykes and their host rocks shows, that the tectonic stress field was not only very similar throughout the archipelago, but that moreover only minor changes of this stress field occurred during the time of dyke emplacement. This holds for all investigated areas in the South Shetland Islands. The geochemical data (ICP-MS) reveal, that most dykes of the South Shetland Islands belong to a calc-alkaline, arc-related suite, ranging from basalts to highly differentiated rhyolites. However, especially during early stages of intrusive activity in the respective areas, also tholeiites occur. Isotopic data (Sr, Nd, Pb) prove a strong crustal component during initial stages of magmatic activity, especially on Hurd Peninsula (Livingston Island). This crustal component decreased with time, accompanied by an increase of sedimentary input into the subduction zone. The high amount of crustal contamination during the initial stages was probably due to a still unstretched continental crust. Besides the continental crust underlying the South Shetland Islands, partial melts from the subducted sediments, fluids derived from the subducting plate and a depleted, heterogeneous mantle wedge contributed to arc magma genesis. According to Ar-Ar datings on plagioclase separates and K-Ar (WR) age determinations, dyke intrusion was restricted to the Paleocene and Eocene. The dykes started to intrude around the Cretaceous/Paleogene boundary at Livingston Island. Only around the Thanetian/Ypresian boundary, dyke intrusion commenced also further NE at Nelson and King George Island, culminating during the Lutetian at 47-45 Ma in all investigated areas. Dyke intrusion then ceased in the latter areas but still continued at Livingston Island until the Priabonian. Combining the information given by the tectonic and geochemical datasets, the time interval covered by the dykes obviously marks a period of geodynamic stability. This includes a stable geometry of the subduction zone and the corresponding parameters (subduction direction and velocity) during that time, as well as stable magma sources. The contribution of the respective sources (sediments, slab, mantle, crust) varied, but the sources themselves remained the same. Very primitive, olivine tholeiitic dykes sampled on Penguin Island as a by-product of this work yielded an unexpectedly high Ar-Ar age (Tortonian), thus questioning the onset of rifting in Bransfield Strait during the Pliocene, as believed so far.

Pharyngeal smears and paraffin-embedded tissue specimens (skeletal muscle, kidney) obtained from 10 male and 10 female individuals were evaluated using non-isotopic in situ hybridization (NISH) with commercial X- and Y-specific biotinylated probes which recognize the pericentromeric regions DXZ1 and DYZ1/DYZ3 of the X- and Y-chromosome, respectively. The results provide evidence that the morphological sex determination of a single cell can be performed by critical application of this staining method leading to one nuclear signal in ldquomalerdquo cells using the Y-specific probe whereas ldquofemalerdquo cells are negative. In situ hybridization of ldquofemalerdquo tissues with an X-specific probe results regularly in 2 signals whereas ldquomalerdquo cells show only one spot in the nucleus.

Fri, 1 Jan 1993 12:00:00 +0100 https://epub.ub.uni-muenchen.de/9388/1/9388.pdf Knuutila, Sakari; Cremer, Thomas; Volin, L.; Ruutu, Tapani; Popp, Susanne; Wessman, M.

Wed, 1 Jan 1992 12:00:00 +0100 https://epub.ub.uni-muenchen.de/9402/1/9402.pdf Cremer, Thomas; Lichter, Peter ddc:610, Medizin

Tue, 1 Jan 1991 12:00:00 +0100 https://epub.ub.uni-muenchen.de/9350/1/9350.pdf Ward, D. C.; Cremer, Thomas; Boyle, A. L.; Lichter, Peter ddc:610, Medi

Tue, 1 Jan 1991 12:00:00 +0100 https://epub.ub.uni-muenchen.de/9352/1/9352.pdf Cremer, Christoph; Stelzer, Ernst; Wienberg, Johannes; Jauch, Anna; Kharboush, I.; Remm, B.; Cremer, Thomas

Thu, 1 Jan 1987 12:00:00 +0100 https://epub.ub.uni-muenchen.de/9327/1/9327.pdf Ward, D. C.; Manuelidis, L.; Tesin, D.; Cremer, Thomas; Villnave, C. A.; Rashtchian, R. N.; Langevin, G. L.; Lawrence, J. B.; Singer, R. H. ddc: