The tale of the "cut hunter" is just a theory, but it's considered one of the most plausible scenarios for how a simian immunodeficiency virus jumped from chimps to humans and became HIV. Remarkably, we do know for certain where the crossover happened because scientists can track it. Like...
In this lesson, see Vitamin A deficiency symptoms and Vitamin A toxicity symptoms. Understand what Vitamin A does for the body and how much of it we need. Related to this QuestionDescribe the role of Vitamin A in preventing blindness. Describe how vision occurs. How is Vitamin D formed?...
In the SAIN,LIM system, SAIN stands for “score of nutritional adequacy of individual foods” and expresses the density of five beneficial nutrients (i.e., protein, fiber, vitamin C, calcium, and iron) per 100 kcal of a food. LIM stands for “limit” and expresses the levels of ...
UV‐exposition is considered as the main reason for the development of cancers of the skin. However, 90 to 100% of the Vitamin‐D reqirement is formed within the skin through the action of sunlight. Considering the results of epidemiological studies, that have detected an association of ...
The shell of a chicken egg is formed by the egg itself using columns of calcite (calcium carbonate) that stack together. This process occurs around a membrane with evenly spaced nucleation points, where the calcite, floating in solution, deposits on the shell like crystals taking form. Defined...
While we’ve been made to think the only way to avoid cavities is to reduce sugar and brush our teeth, the research points to many more dietary causes. And dental interventions aren’t the only answer when it comes to trying to heal decay. Some time and patience, along with great oral...
Fat cells are formed in the developing fetus during the third trimester of pregnancy, and later at the onset of puberty, when the sex hormones "kick in." It is during puberty that the differences in fat distribution between men and women begin to take form. One amazing fact is that fat ...
Vitamin C, also known as ascorbic acid, is probably one of the most highly publicized, yet least understood, of all of the vitamins. Championed by Nobel laureate Linus Pauling, Ph.D., and advocated by many nutrition buffs, vitamin C is indeed a fascinating and important nutrient (or micron...
How efficient is the metabolism of lithotrophs, relative to organotrophs? What is the importance of vitamin K in the human body? How is active Vitamin D formed? Explain Zinc is necessary for the synthesis of Vitamin A transport proteins and the oxidation of retinal to retinal so a deficiency...
Under running water or in a bowl or pot filled with water, slowly begin peeling at the bottom of the egg where an air pocket should have formed during cooking. The water helps the peeling process move along stealthily. Does Vinegar or Baking Soda Tricks for Easy Peel Boiled Eggs Really ...