منابع مشابه
New Chromophore for Phytic Acid Determination
Cereal Chem. 63(6):475-478 A direct spectrophotometric method was developed to analyze phytic phytate. The new chromophore was used to determine phytic acid in eight acid without acid digestion. The method was based on the precipitation of legume seeds. Values obtained for phytic acid with the new chromophore phytate as ferric phytate followed by conversion to sodium phytate. On agreed with tho...
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Natural Bile Pigments, Coprobiliverdin III, Model Chromophore, Spectroscopy, MO-Calculations The synthesis of l5N-labeled coprobiliverdin III, a bile pigment with four conjugated pyrrole nuclei and four carboxylic acid side chains, is described. Coprobiliverdin is structurally characterized by chemical and various spectroscopic methods (e.g. chromic acid degradation, UV-vis-, IR-, mass spectros...
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Pseudomonas spp. of the fluorescent group produce siderophores (so-called pyoverdins) consisting of a peptide chain attached to a pyrimidoquinoline ring system which is derived from a condensation product of L-Dab and D-Tyr. Commonly several related compounds are found to accompany the pyoverdins having the same peptide chain, but differing in the heterocyclic part. The structure elucidation of...
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The chromophore of phytochrome, the plant photomorphogenic pigment, was cleaved from the associated protein. Chromatographic and spectral properties indicated that it was a bilitriene closely similar to but distinct from the chromophore of C-phycocyanin and allophycocyanin.
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substance was also hydrolyzed lvith acid to split vinyl ethers (13). The products were partitioned between ether and water and cr-glycols determined in each phase. Saponification released considerable amounts of glycerol (Table I, 3b). Thus Eluate C1 from the silicic acid column apparently still contained some ester triglycerides. The ether-soluble fraction contained glycols which yielded on ac...
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ژورنال
عنوان ژورنال: Sen'i Gakkaishi
سال: 1987
ISSN: 0037-9875,1884-2259
DOI: 10.2115/fiber.43.3_p108