Isotope

over billions of years. Uniformitarianism also date the Earth around 4.6 billion years old from the way sediments and layers of soil sediments have been layered. From the use of radioactive dating and the decay of daughter isotopes. Uniformitarianism rejects the scripture of God by the belief in the Big Bang Theory. Catastrophism is events quickly and violently change the face of the Earth. Noah flood changed the face of the Earth burring sediments…

What are the nonpolar parts of a phospholipid? c. Tail group 4. This is the only polar portion of a cholesterol molecule and it forms hydrogen bonds with the polar heads of phospholipids. d. –OH group 5. This type of membrane protein will extend throughout the entire membrane touching both the Intracellular fluid and the Extracellular fluid. e. Integral proteins f. Transmembrane proteins g. Integral proteins and Transmembrane proteins Ans: D…

INTRODUCTION OF PUBLIC HEALTH CONCERN A designer drug is an analog of an illegal drug that has been modified structurally and/or functionally such that it can be sold in the US because the chemical structure of the substance no longer matches a known controlled substance (Wohlfarth 2010). People, especially teens, can purchase these “new psychoactive substances” (NPS) online and from friends, without an understanding of what they are actually taking. Deaths due to designer drugs happen, and…

The basis of Mendeleev’s periodic table was categorizing the elements according to their physical and chemical characteristics with regard to their atomic weights. Mendeleev was the first to come up with a structure for the periodic table with columns and rows. There were other scientists who have worked on tabulating information of the elements even before Mendeleev, however, he was the first scientist to come up with a periodic trend to predict the properties of elements which were not…

daily) Fact Questions (x4) Q1: What is Radiocarbon Dating”? Notes to Q1: "Radiocarbon Dating." Wikipedia. Wikimedia Foundation, 24 Sept. 2014. Web. 30 Sept. 2014. What is “? How does it work? Estimate of the age of an organic thing using carbon isotopes 12c or 14c. Radiocarbon combines with oxygen from the atmosphere to form radioactive carbon dioxide. Archaeologists use radiocarbon dating to date artifacts and fossils. farthest it can date is 50,000 years. Who discovered it? The…

compound is then split into different fragments less than 86m/z. The most important fact is that the one with the highest mass becomes positively charge. There might be a compound that has m/z equal to 86 or 87 but this would be due to the different isotopes that…

INTRODUCTION Over five thousand years old, Stonehenge is a fascinating representation of human capability at a time before widespread technology. One of the seven wonders of the medieval world, Stonehenge is among the most recognizable monuments of its era, alongside the Colosseum in Rome and the Great Wall of China. In this paper, we will discuss the people who erected the monument, why and how it was constructed, and its perceived relevance ever since. WHO WERE THE PEOPLE THAT CONSTRUCTED…

Nuclear medicine is used by physicians all over the world, pre-dating Computed Tomography (CT), Magnetic Resonance Imaging (MRI), and Ultrasound technology. Tests are conducted using pharmaceuticals in conjunction with specific mechanical imaging, allowing optimal diagnosis for various conditions. Nuclear medicine allows doctors to see inside the body in ways that X-ray, CT, and MRI alone cannot, providing the most accurate way to study and diagnose specific abnormalities within the body’s…

A double-edged sword: what was thought to be a defense mechanism turns out to be an attractive feature (paper 4) Over the years, plants have adapted many features that act as defense mechanisms and help to protect the plant from harmful predators. In a 2014 study, Kevin D. Kohl et al. observed the efficiency of cactus spines as a defensive mechanism by studying white-throated woodrats, Neotoma albigula. These woodrats are herbivorous rats that are commonly found in the southwestern region of…

The dire wolf, or Canis dirus, is a wolf that lived during the Pleistocene Epoch (2.6 million to 11,700 years ago) and became extinct between 10,000 to 16,000 years ago during the ice age. It was native to North America and thousands of Dire Wolf skeletons were found and stored in La Brea tar pits in southern California, where it is believed to be the most common mammal in the area. Remains of the Dire wolf have also been found across a broad range of habitats in North America, which include the…