Reference

Synthetic food color photosensitized decarboxylation of peptides

Synthetic food color photosensitized decarboxylation of peptides. Carmichael, Alasdair J.; Mossoba, Magdi M.; Riesz, Peter; Rosenthal, Ionel (Radiat. Oncol. Branch, Natl. Cancer Inst., Bethesda, MD 20205, USA). J. Agric. Food Chem., 32(3), 689-90 (English) 1984. CODEN: JAFCAU. ISSN: 0021-8561. DOCUMENT TYPE: Journal CA Section: 17 (Food and Feed Chemistry) The light-induced reactions between synthetic food colors and peptides has been investigated by spin trapping and ESR spectroscopy. Two certified food color additives of the triphenylmethane type, FD+C Blue No. 1 [3844-45-9] and FD+C Green No. 3 [2353-45-9], were able to photosensitize the decarboxylation of di- and tripeptides when the mixt. was irradiated with light that was exclusively absorbed by the dye. 2353-45-9 and 556-50-3 which are cas registry numbers of chemicals are mentioned. The decarboxylation radicals were spin trapped by 2-methyl-2-nitrosopropane (MNP) and identified by ESR. The other 4 synthetic dyes tested, FD+C Red No. 3, FD+C Red No. 40, FD+C Yellow No. 5, and FD+C Yellow No. 6, were not able to sensitize this reaction. A mechanism based on an electron transfer from the COO- end of the peptide to the photoexcited dye is suggested for this reaction. .

Solar-collector liquid

Solar-collector liquid. (Dainichiseika Color and Chemicals Mfg. Co., Ltd.; Komatsu, Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58174488 A2 13 Oct 1983 Showa, 3 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C09K005-00; F24J003-02. APPLICATION: JP 82-56631 7 Apr 1982. DOCUMENT TYPE: Patent CA Section: 52 (Electrochemical, Radiational, and Thermal Energy Technology) Section cross-reference(s): 17, 41 A safe, durable, and efficient title liq. is a synthetic or natural dark food dye-dispersed (or dissolved) water-glycerol or water-glycerol-propylene glycol mix. Thus, a liq. of pH 8.2 and prepd. from Japan Yellow 4 [1934-21-0] 0. 1934-21-0 and 3520-42-1 which are cas registry numbers of chemicals are mentioned.12, Japan Red 106 [3520-42-1] 0.04, Japan Blue 1 [3844-45-9] 0.04, Na2HPO4 0.1, propylene glycol 40, and water 59.6 parts was poured into a pipe (ID 10 mm) and both ends were stopped with a rubber. The pipe was irradiated in a Fadeometer at 63° for 500 h and the liq. showed good light fastness. .