Noun [edit]. viola â(plural violas). ( 1 music) A stringed instrument of the violin family, somewhat larger than a violin, played under the chin, and having a deeper tone. ( 2 music) An organ stop having a similar tone. ( 3 music) A 10-string steel-string acoustic guitar, used in Brazilian folk music.oun [edit]. viola â(plural violas). ( 1 music) A stringed instrument of the violin family, somewhat larger than a violin, played under the chin, and having a deeper tone. ( 2 music) An organ stop having a similar tone. ( 3 music) A 10-string steel-string acoustic guitar, used in Brazilian folk music.
Dipalmitoylphosphatidylcholine (DPPtdCho) is a phospholipid (and a lecithin) consisting of two palmitic acids attached of a phosphatidylcholine head-group and is the major constituent of many pulmonary surfactants. It is zwitterionic by virtue of having a negative charge on the phosphate group and a positive charge on the quaternary ammonium group.
Nonylphenol, a known endocrine disrupting chemical (EDC), is a degradation product of the antioxidant additive tris(nonylphenyl)phosphite (TNPP) and therefore a non-intentionally added substance (NIAS).In plastics, TNPP reacts with peroxide radicals, thereby reducing polymer degradation.n the US, TNPP is cleared as an indirect food additive. Reference. Mottier, P. et al. (2014). â LC-MS/MS analytical procedure to quantify tris(nonylphenyl)phosphite, as a source of the endocrine disruptors 4-nonylphenols, in food packaging materials .â Food Additives & Contaminants: Part A (online February 19, 2014).