Tannins are phenol compounds found in a variety of plants. Their survival strategies in nature produce benefits in wine, food, health...

Rennet is a complex set of enzymes central to many cheeses. It coagulates milk to form curds.  The primary enzyme in rennet is chymosin...

Esters and phenols are compounds creating flavors, colors and aromas for sensory experience. Artisans in brewing, perfumery or food must...

Phenols are found in the aromatic compounds of plants and synthetic variants. These compounds influence the environment and health in...

Phenols are aromatic compounds important to ecosystems, human health and industry. Their functions go beyond fragrance. They're used in...

Chalk is fundamentally calcium carbonate (CaCO3) and takes hundreds of millions of years to form. This seemingly mundane mineral has a...

Differences between Gram-negative and Gram-positive bacteria are fairly straightforward, related to cell membrane structure. Knowing...

Cobalt is a silvery grey metal used across various fields, including science, medicine, and industry. It receives its name from the...

Zaffre (zaffer) is a vibrant deep blue pigment developed by alchemists, major pigment creators, by c. 1550 AD. Characterized by brilliant...

Glass of antimony , or vitrum antimonii , gives warm yellow or red hues. As Sb2O3, its use in alchemy is largely medicinal, one of many...

Calcite is made up of calcium carbonate (CaCO3). With stunning crystal formations and a range of beautiful colors, calcite also has...

Galen of Pergamon (c. 129 - 216 AD) is well known in the history of medicine. His extensive writings and theories prevail for over 2000...

In practical alchemy, mercury II oxide (HgO) is often called the "Red Precipitate," with its compound Mercuric Amidochloride (Hg(NH2)Cl),...

Liver of Sulfur is a unique compound of alchemy, metallurgy and medicine. Also known as hepar sulfuris or sulfurated potash, Liver of...

Green algae are simple life forms with amazing impact on the environments of Earth. Algae can be grown at home for microscopy, biology...

Chalcopyrite (CuFeS₂) is vital to the earth's geology. A primary ore of copper, this scintillating mineral is influential to health,...

Copper (Cu) and its warm golden red hue is part of humanity. It's one of the most important metals of alchemy , aids plant health and is...

Iodine (I) is an essential element in biology, industry, science and health. It's known for its intense violet gas and strong odor....

Scheele's Green is a rich, vibrant green. Its color appeal surpasses that of the copper carbonate paints of the late 18th century and...

Carl Wilhelm Scheele (1742 - 1786) is a self-taught German-Swedish chemist whose work has strong impact on chemical sciences of the day....