Tutor and Freelance Writer. Science Teacher and Lover of Essays. Article last reviewed: 2019 | St. Rosemary Institution © 2010-2020 | Creative Commons 4.0

Vitamins & Nutrient Supplements: History, Use, Effectiveness

A Vitamin is any organic compound required by the body in small amounts for metabolism, to protect health, and for proper growth in children. Vitamins also assist in the formation of hormones, blood cells, the chemicals of the nervous-system, and genetic material. The various vitamins are not chemically related, and most differ in their physiological…

Antihistamines: Uses, Facts, Side Effects

Antihistamines are drugs that block the action of histamine. Histamine, also known as histamine phosphate, an amine (beta-imidazolyl-ethylamine, ergamine, or ergotidime) that is a normal constituent of almost all animal body cells. Histamine is also found in small quantities in ergot and purified meat products and is produced synthetically for medicinal purposes. In the body,…

Crystallography & Types of Crystals

The study of the growth, shape, and geometric characteristics of crystals is called crystallography.  When the conditions are right, each chemical element and compound can crystallize in a definite and characteristic form. Thirty-two classes of crystals are theoretically possible, almost all common minerals fall into one of about twelve classes, and some classes have never…