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Protocatechuic acid (PCA) is a dihydroxybenzoic acid, a type of phenolic acid. It is a major metabolite of antioxidant polyphenols found in green tea . It has mixed effects on normal and cancer cells in in vitro and in vivo studies. [ 4 ]
Pyroglutamic acid (also known as PCA, 5-oxoproline, pidolic acid) is a ubiquitous but understudied natural amino acid derivative in which the free amino group of glutamic acid or glutamine cyclizes to form a lactam. [1] The names of pyroglutamic acid conjugate base, anion, salts, and esters are pyroglutamate, 5-oxoprolinate, or pidolate.
Plate count agar (PCA), also called standard methods agar (SMA), is a microbiological growth medium commonly used to assess or to monitor "total" or viable bacterial growth of a sample. PCA is not a selective medium. The total number of living aerobic bacteria can be determined using a plate count agar which is a substrate for bacteria to grow on.
PCA may refer to: Medicine and biology. Patient-controlled analgesia; Plate count agar in microbiology; Polymerase cycling assembly, for large DNA oligonucleotides;
David Brooks, the snack food company buyer interviewed by The Washington Post after the Salmonella outbreak, said that he inspected this plant three times on behalf of his company in the mid-1980s to determine whether to buy peanuts from PCA. The plant failed his private inspection each time for what he called "just filthy" conditions ...
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“It’s going to take a lot longer. We’ve got a lot, a lot of damage,” he said. “This is like a war zone.” As of Saturday, nearly all of Lowndes County remained without power.
Proanthocyanidins are a class of polyphenols found in many plants, such as cranberry, blueberry, and grape seeds. Chemically, they are oligomeric flavonoids. Many are oligomers of catechin and epicatechin and their gallic acid esters. More complex polyphenols, having the same polymeric building block, form the group of condensed tannins.