Are there polyprotic acids?

Most of the fluid in semen is made up of secretions from male reproductive organs. Semen contains citric acid, free amino acids, fructose, enzymes, ... Apr 14, 2003 ... 5 DL- malic acid is made synthetically by catalytic oxidation of benzene to maleic acid, which is converted to malic acid by heating with. Vinegar is a combination of acetic acid and water made by a two-step fermentation process. First, yeast feed on the sugar or starch of any liquid from a plant ... Apr 4, 2022 ... Its main source is not from fruit, but from the fermentation of crude sugars (e.g., molasses and corn starch) by the mold Aspergillus niger. It ... Proteins are made up of amino acids containing mostly hydrogen, carbon, nitrogen and oxygen, as linked together in chains. The natural production method features bacterial fermentation of carbohydrates (sugars, starches). Lactic acid is made from beet sugar, cane sugar, corn and ... The sugar in these renewable materials are fermented and turned into lactic acid, when is then made into polylactic acid, or PLA. ... Made from a ... Acid that is released into the stomach from glands in the stomach wall. It helps digest food. Gastric acid is made of hydrochloric acid. ❖ PFOS and PFOA can also be formed by environmental degradation or by metabolism in larger organisms from a large group of related. PFASs or precursor compounds ... Aug 9, 2018 ... In 1917, American food chemist James Currie had begun experimenting with a process of making citric acid from mold. Currie discovered that ...