Guo, Rui published the artcilePectic polysaccharides from purple passion fruit peel: A comprehensive study in macromolecular and conformational characterizations, Quality Control of 59-23-4, the main research area is pectic polysaccharide purple passion fruit peel conformation; Conformational behavior; Macromolecular dimension; Passiflora edulis Sims f. edulis; Pectic polysaccharides; Purple passion fruit peel; Ultrasonic-aided ammonium oxalate extraction.
A polysaccharide (PFPP) from purple passion fruit peel was optimally extracted, with the highest yield (10.05%, weight/weight) obtained under 35°C extraction temperature, 240 W ultrasonic power, 65:1 mL/g liquid-to-solid ratio, 0.6% (w/v) ammonium oxalate, 30 min extraction time and pH 2.0. According to composition analyses, pectic PFPP and its fractions (PFPP-10, -15 and -20) were revealed as linear homogalacturonans interrupted by rhamnogalacturonan I in different lengths and extensities, where low esterification degrees (35.35-39.66%) were indicated via FT-IR. Furthermore, based on macromol. models, comprehensive analyses on macromol. and conformational characterizations of PFPP fractions were conducted quant. through, e.g., shape factor (1.42-1.79), Mark-Houwink-Sakurada exponent (0.55-0.74), conformational power-law exponent (0.52-0.58), fractal dimension (1.72-1.94) and persistence length (6.73-13.47 nm). Therefore, different semi-flexible coil conformations were proposed schematically, where lower mol.-weight PFPP fractions were less flexible. This could provide a mol. basis for precise re-utilizations of PFPP in food and pharmaceutical industries.
Carbohydrate Polymers published new progress about Conformation. 59-23-4 belongs to class alcohols-buliding-blocks, name is (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal, and the molecular formula is C6H12O6, Quality Control of 59-23-4.
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