Podcasts about radioactive isotopes

Please note the recording was before the new NASEM model was released. However, there is still a lot of good information from Dr. Weiss beyond those recommendations. This Real Science Exchange podcast episode was recorded during a webinar from Balchem's Real Science Lecture Series. You can find it at balchem.com/realscience.Most ration formulation software uses the 2001 NRC mineral equations. The basic concept of the 2001 NRC mineral requirements is to feed enough absorbable minerals to maintain adequate labile body stores and fluid concentrations. Minerals are lost each day via excretion in feces and urine, milk production, and incorporation into tissues or the fetus in the case of growing or pregnant animals. We have decent data to predict mineral concentrations of milk, growth, and the fetus; however, the endogenous loss in feces is much harder to capture. Absorption coefficients (AC) for most minerals are exceedingly difficult to measure. (0:29)The NRC requirements are the means of several experiments. Feeding to the mean results in half the cows being fed adequately or in excess, and half are not fed enough. In human nutrition, recommended daily allowances for vitamins and minerals are calculated as the mean plus two standard deviations, which statistically meets the requirement for 97% of the population. Since the standard deviation of the requirement is hard to acquire, human nutrition uses the same standard deviation for energy metabolism, around 20%. Dr. Weiss feels this is a reasonable safety factor for minerals for animals as well. He recommends feeding about 1.2 times the NRC requirement while keeping an eye on the maximum tolerable limit for the mineral in question. (4:59)How do we measure absorption? We measure the minerals in the diet, we apply AC, and we get grams or milligrams of absorbed minerals available for the animal to use. Dr. Weiss details some of the complex methodology involved in trying to obtain AC. Feces contain not only unabsorbed dietary minerals but also endogenous/metabolic minerals (e.g., intestinal cells, enzymes, etc.) and homeostatic excretion of minerals (e.g., dumping excess minerals). In the 2001 NRC, the endogenous fecal for almost every mineral is a function of body weight, which is incorrect. It should be a function of dry matter intake. (8:40)Endogenous fecal losses can also be measured using stable or radioactive isotopes. This method is extremely expensive and if radioactive isotopes are used, management of radioactive waste becomes an issue. Thus, most of the AC for trace minerals that used these methods are 50-60 years old. (15:33)Dr. Weiss details some of the issues with calcium requirements in the 2001 NRC leading to overestimation of calcium absorption for many calcium sources and overestimation of the maintenance requirement due to endogenous fecal being calculated using body weight. Organic and inorganic phosphorus have different AC, so partitioning between organic and inorganic will give a more accurate estimate of the requirement. (16:33)Potassium has a linear antagonistic effect on magnesium. You can feed more magnesium to overcome this antagonism, but you won't ever eliminate it. If you feed a few percent added fat as long-chain fatty acids, Dr. Weiss recommends feeding 10-20% more magnesium to account for soap formation in the rumen. (19:17)It's much more difficult to measure AC for trace minerals due to multiple antagonists, interactions among different minerals, and regulated absorption. In addition, AC for trace minerals is very low, which means a small change in the AC can have a huge impact on diet formulation. All feeds in the NRC system have the same AC for each trace mineral and we know that's not right.  (25:39)Dr. Weiss gives an overview of different trace mineral antagonisms and interactions and details his approach to formulation if he has absorption data for a particular ingredient. He also gives his estimates of revised AC for several minerals. (28:07)In summary, the factorial NRC approach only fits 50% of the population. Feeding an extra 10-20% above the NRC requirement includes about 97% of the population. We need to continue to account for more sources of variation in AC. Interactions need to be top of mind when considering mineral requirements and diet formulation. (37:39)Dr. Weiss takes a series of questions from the webinar audience. (40:50)Please subscribe and share with your industry friends to invite more people to join us at the Real Science Exchange virtual pub table.  If you want one of our Real Science Exchange t-shirts, screenshot your rating, review, or subscription, and email a picture to anh.marketing@balchem.com. Include your size and mailing address, and we'll mail you a shirt.

This week Magnum & Izzo discuss whether or not humans were the first advanced industrial civilization on Earth. EPISODE 125 OF THE SWERVE PODCAST ↩️

Die Sonne entstand vor etwa 4,6 Milliarden Jahren in einer riesigen, sich drehenden Gas- und Staubwolke, dem sogenannten Sonnennebel.Als der Nebel unter seiner eigenen Schwerkraft kollabierte, drehte er sich schneller und flachte sich zu einer Scheibe ab. Alle Planeten bildeten sich innerhalb dieser Scheibe. Radioaktive Isotope helfen uns zu wissen, was zur Zeit der Entstehung […] The post #20 Decoding Origin of our Solar System from Radioactive Isotopes appeared first on Kanal K.

Dr. Ryan Ickert, senior research scientist with the Department of Earth, Atmospheric, and Planetary Sciences at Purdue University, describes how radioactive isotopes are used to determine the age of rocks and minerals in a field of study known as geochronology. When scientists knowing the rates of decay of elements such as uranium, thorium, and potassium, they can use this information as a type of clock to determine the age of materials as far back as the beginning of our Solar System!   

Learn about ancient evidence of humans using fire; Heisenberg's uncertainty principle; and your memory on social media. We just found the earliest evidence of humans changing their ecosystems with fire by Grant Currin Nield, D. (2021). Scientists Find Oldest Evidence of Ancient Human Activity Deep Inside a Desert Cave. ScienceAlert. https://www.sciencealert.com/scientists-find-the-oldest-evidence-of-indoor-human-activity-deep-inside-a-desert-cave  Ratner, P. (2021, May 3). From 1.8 million years ago, earliest evidence of human activity found. Big Think; Big Think. https://bigthink.com/surprising-science/earliest-evidence-human-activity  Shaar, R., Matmon, A., Horwitz, L. K., Ebert, Y., Chazan, M., Arnold, M., Aumaître, G., Bourlès, D., & Keddadouche, K. (2021). Magnetostratigraphy and cosmogenic dating of Wonderwerk Cave: New constraints for the chronology of the South African Earlier Stone Age. Quaternary Science Reviews, 259, 106907. https://doi.org/10.1016/j.quascirev.2021.106907  Scientists may have overcome Heisenberg's uncertainty principle by Briana Brownell Mercier de Lépinay, L., Ockeloen-Korppi, C. F., Woolley, M. J., & Sillanpää, M. A. (2021). Quantum mechanics–free subsystem with mechanical oscillators. Science, 372(6542), 625–629. https://doi.org/10.1126/science.abf5389  ‌Evading the uncertainty principle in quantum physics. (2021). EurekAlert! https://www.eurekalert.org/pub_releases/2021-05/au-etu050521.php  ‌Ratner, P. (2021, May 15). Physicists push limits of Heisenberg Uncertainty Principle. Big Think; Big Think. https://bigthink.com/surprising-science/breakthrough-quantum-entanglement-heisenberg  Turner, B. (2021, May 15). Scientist find a loophole in Heisenberg's uncertainty principle. MSN. com. https://www.msn.com/en-gb/entertainment/news/scientist-find-a-loophole-in-heisenbergs-uncertainty-principle/ar-BB1gLlgP  Is Social Media Hurting Your Memory? first aired June 7, 2018 https://omny.fm/shows/curiosity-daily/your-memory-on-social-media-best-workouts-and-why  Follow Curiosity Daily on your favorite podcast app to learn something new every day withCody Gough andAshley Hamer — for free!  See omnystudio.com/listener for privacy information.

I Sharted The Other Day, The Importance Of Safe Driving, Religion: The Real Dehumanizer, Radioactive Isotopes, Racist History, Get Vaccinated, Billie Eyelash, and My Favorite Sweaty Man… Kenny Omega. Thank You. FMH --- This episode is sponsored by · Anchor: The easiest way to make a podcast. https://anchor.fm/app

Logan and James talk about a variety of topics ranging from Dennys' Radioactive Isotopes vs. Waffle House's Godly Hash browns to Religion and what happens after we kick the bucket. Join the brothers as they discuss these topics and more in the 2nd episode of the critical-acclaimed Double Take Podcast.

Hallie Arnott interviews Dr Benjamin Rotstein from the University of Ottawa Heart Institute about the development of new radioactive molecules for imaging the heart

In this episode, we discuss: (1) visiting the Long Beach Collectors Convention, (2) a platinum mailday, (3) the contrast in prices between National Treasures boxes and 1997-98 Metal Universe boxes, (4) the liquidation of a high-end Michael Jordan PC, (5) the impact of the newly imposed sales taxes on eBay's robust sports card market, (6) Justin Bieber showing off his Pokemon collection, (7) the 2018-19 Lebron James Optic Holo PSA 10 phenomenon (by comparing it to the 1997-98 Michael Jordan Planet Metal PSA 10 insert), and (8) whether the sports card market truly is a "house of jordans."

Join 'She' for the GivingTree. She will connect you to your heart and hands...while reminding you of moving beyond the NOW and bringing Presence to the ‘next’ 7 Generations. Shinning a light on those who are engaging in a conversation about the “messes” we have made and pointing ‘US’ to solutions to regenerate the world around ‘US’. (R)Shining a Light on Paul Stamets FB Post and FungiDavid Suzuki Article in EcoWatchCritical Thinking...Things to Possible Research, Contemplate and Investigate... Chernobyl, Radioactive Isotopes, The Heart Sutra and what do you want to leave as your foot print?Music by: Xavier Rudd Cultural Bleeding and Spirit BIRDConnect withSuzanne Toro

Join 'She' for the GivingTree. She will connect you to your heart and hands...while reminding you of moving beyond the NOW and bringing Presence to the ‘next’ 7 Generations. Shinning a light on those who are engaging in a conversation about the “messes” we have made and pointing ‘US’ to solutions to regenerate the world around ‘US’. (R) Shining a Light on Paul Stamets FB Post and Fungi David Suzuki Article in EcoWatch Critical Thinking...Things to Possible Research, Contemplate and Investigate... Chernobyl, Radioactive Isotopes, The Heart Sutra and what do you want to leave as your foot print? Music by: Xavier Rudd Cultural Bleeding and Spirit BIRD Connect with Suzanne Toro  

Join 'She' for the GivingTree. She will connect you to your heart and hands...while reminding you of moving beyond the NOW and bringing Presence to the ‘next' 7 Generations. Shinning a light on those who are engaging in a conversation about the “messes” we have made and pointing ‘US' to solutions to regenerate the world around ‘US'. (R) Shining a Light on Paul Stamets FB Post and Fungi David Suzuki Article in EcoWatch Critical Thinking...Things to Possible Research, Contemplate and Investigate... Chernobyl, Radioactive Isotopes, The Heart Sutra and what do you want to leave as your foot print? Music by: Xavier Rudd Cultural Bleeding and Spirit BIRD Connect with Suzanne Toro Bare Naked Bliss Sessions with 'She' Essential Living Foods

Join 'She' for the GivingTree. She will connect you to your heart and hands...while reminding you of moving beyond the NOW and bringing Presence to the ‘next' 7 Generations. Shinning a light on those who are engaging in a conversation about the “messes” we have made and pointing ‘US' to solutions to regenerate the world around ‘US'. Shining a Light on Paul Stamets FB Post and Fungi David Suzuki Article in EcoWatch Critical Thinking...Things to Possible Research, Contemplate and Investigate... Chernobyl, Radioactive Isotopes, The Heart Sutra and what do you want to leave as your foot print? Music by: Xavier Rudd Cultural Bleeding and Spirit BIRD Connect with Suzanne Toro Bare Naked Bliss Sessions with 'She' Essential Living Foods

Dr David Robinson explains the relationship between fungi and living trees.

Transcript -- Dr David Robinson explains the relationship between fungi and living trees.

Transcript -- Dr David Robinson explains the relationship between fungi and living trees.

Dr David Robinson explains the relationship between fungi and living trees.