Inhibition of growth of freshwater microalgae by long-chained aliphatic amines employed in solvent extraction processes

Amine-algae interactions: cation-exchange and possible hydrogen bonding

“…(1)(2)(3). Isoprene and most terpenes react rapidly with ozone, the hydroxyl radical, and the nitrate radical; the corresponding reaction rate constants are known with reasonable certainty (4)(5)(6). For isoprene, several experimental studies of oxidation products have been carried out (7,8), and the corresponding results can be used as input data in computer kinetic models that describe the oxidation and fate of biogenic hydrocarbons in the atmosphere (9)(10)(11).…”

“…It is well-known that added diamines interact with nucleic acid and are important as a means of controlling the growth process in animals, plants, and microorganisms (1), and in Chlorella the concentration levels of diamines parallel the extent of DNA replication (2). On the other hand, Cj-C6 aliphatic amines greatly inhibited the photosynthesis and nitrogen fixation of Chlorella ellipsoidea (3), and long-chain (C12-C15) amines are very strong inhibitors of the growth of microalgae (4). Amines can be formed from metabolism of proteins and decarboxylation of amino acids (5)(6)(7).…”

“…Important environmental consequences arise from the fact that cattle feed lots generate considerable amounts of the short-chain amines, which accumulate in surface water to concentration levels toxic to Chlorella (3). Similarly, high concentrations of the long-chain amines arise from metallurgy processes used for recovery of silver (4).…”