Isotope

Throughout history, in all forms of life, there has been one undeniable trend that has evolved and altered but still remained one of the basic necessities of life, eating. In Kristen J. Gremillion’s Ancestral Appetite: Food in Prehistory she sets up the history of eating, what and how people have eaten in the past few million years and her theory on how that has led to modern diets. As this work is set up in chronological order, Gremillion points out the major inventions, events, and changes to…

28. a) A structure that was made if two chains of nucleotides, each in a helix, with each chain running parallel to each other. Also proved that the nucleotide bases could pair up in only one way based on Chargaff’s rule. b) Franklin’s x-ray diffraction photographs showed that the wet form of DNA likely had a double helix. Wilkins showed Watson Franklin’s results and at the time Watson and Crick were experimenting with many potential models of having 1,2 or even 2 strands. As soon as Watson saw…

WHAT IS NMR SPECTROCOPY? By definition, NMR spectroscopy is a research technique that makes use of the fact that certain atomic nuclei exhibit magnetic property to determine their chemical and physical properties for various uses that we’ll discuss later. History of NMR Spectroscopy Year Individual Discovery 1921 Stern and Gerlach Basis of quantum theory is confirmed by carrying out atomic and molecular beam experiments 1925 Ulhenbeck & Goudsmith Discovered the concept of spinning…

blue is used to treat thallium and radiocesium poisoning by combining the two in the intestines and stops them from being re-absorbed into the body. Overview Prussian blue treats patients with thallium or radiocesium poisoning by binding the two isotopes in the gastrointestinal tract and the combination removes the poison from the body through the patient’s stools. With the removal of thallium or radiocesium through the stool, the harm to the patient’s tissues and organs remain reduced with…

One method often used to date objects is radiocarbon dating, which works by comparing isotopes of carbon and their half-lives. This is an especially accurate method because it is unfazed by chemical, temperature, and physical changes so the timing will be correct no matter what. Another form of dating is using soil, sediment, or peat build-up…

Hydrogen. The old elements paired up with the new elements to find out a way to get Hydrogen back. They decided to send a small group of people to follow the wolfram until it was a good time to attack. So they sent Julie, Al, Aurum, and the Hydrogen Isotopes. Then someone suggested that someone from Tungsten group should go to, so they also picked Chromium and Molybdenum. (This falls under what we have learned this year about how the periodic table has groups and…

Methane is a byproduct of livestock. It is a fast acting greenhouse gas, meaning that methane will contribute to climate change more quickly than some other greenhouse gases. The scientific reasoning behind this lies in the half-life of methane. An isotope 's half-life is how long it takes for half of it to decay. Methane has a half life of 8 years (Goodland & Anhang), significantly less than carbon dioxide’s 100 year half life (Goodland & Anhang). As a greenhouse gas decays, it releases energy…

Paul.S.Martin Twilight of the mammoths - Summary & Critique Extinction is defined as “species that are no longer existing”, and has been a problem since the beginning of time. It is said that extinction started when humans came into the equation, it isn’t unknown of the ecological situation that humans have put on our planet as it is extremely complicated. Besides, their are many common problems and stipulations about global warming and climate change that is heard about on a regular basis,…

percent of total energy) and radioactivity [initial radiation and induced radiation] (atomicbombmuseum.org). Of the three the most deadly over time is the radioactivity. The black rain was the product of two hundred different kinds of radioactive isotopes, which rose into the atmosphere, mixed carbon residue and falling as dark water [caused radiation poisoning] (atomicbombmuseum.org). Also, initial radiation damaged exposed living tissue, lethal enough to kill someone on the spot…

“That’s one small step for man, one giant leap for mankind.” – Neil Armstrong. The Space Race was a competition between the two rivals of the Cold War, the United States of America, and the Soviet Union. The goal was to be the first country to have a man land on the moon. However, for this to happen, there had to be major changes. Specifically, the technology of the time had to be more advanced for both countries to be able to get to the moon. Therefore, the U.S./Soviet Space Race led to amazing…