Elements in their standard state also have the same number of electrons as protons. Forms of an Element. Even though elements are all made from the same type of atoms, they can still come in different forms. Depending on their temperature they can be solid, liquid, or gas.
Tannins: Any of a broad group of plant-derived phenolic compounds characterized by their ability to precipitate proteins. Tannins are found in many fruits, berries, nuts, beans, beverages, breads, smokes, herbs and spices.They are in part responsible for the bitter, astringent tastes of black tea and many wines and beers.Phenolics (of which tannins are a subgroup) are found in perfumes, fragrances, paints, petroleum products, household and industrial cleaners, and many food dyes (both natural and artificial).hey are in part responsible for the bitter, astringent tastes of black tea and many wines and beers. Phenolics (of which tannins are a subgroup) are found in perfumes, fragrances, paints, petroleum products, household and industrial cleaners, and many food dyes (both natural and artificial).
1 The oldest system of tanning relies on the chemical action of vegetable material containing tannin, or tannic acid, on the protein constituents of skin. Vegetable tanning seems to have been practiced in prehistoric times. In historic times, the Hebrews tanned with oak bark, and the Egyptians, with babul pods. The Romans used bark, certain woods, and berries. The Arabs tanned with bark and roots, and in the Middle Ages they reintroduced the art into Europe via Spain. By the 18th century the value of materials such as oak bark, sumac, valonia, and hemlock was well established.