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- W4286543228 abstract "Abstract The aim of this work is to investigate the structural features, physicochemical, rheological, and emulsifying properties of pectin extracted from pumpkin “ Cucurbita maxima ” pulp and peel. After the peel and pulp of fresh pumpkin were solubilized in water at high temperature (80°C) and clarification, the obtained filtrate was treated with aluminum sulphate, which precipitates a fibrous coagulum. The results found that the major functional groups of pectin isolates identified by Fourier transform infrared are: –OH, CH 2 , C═C, –C–O–C–, and CH 3 . The results obtained using nuclear magnetic resonance methods suggest that these polysaccharides consist of two domains: the first one is homogalacturonan and the second is formed by rhamnogalacturonan. Mineral and metal ions on pectin surface detected using scanning electron microscopy coupled to energy dispersive X-ray analysis were different pulp and peel pectin. Rheological behavior of these biopolymers is suitably represented by the Herschel–Bulkley and power law models. The extracted pectin has a viscosity spectrum expressed by the following properties: G ′ , G ′′ , G* , and <m:math xmlns:m=http://www.w3.org/1998/Math/MathML> <m:mrow> <m:mo stretchy=false>∣</m:mo> <m:mrow> <m:mover accent=true> <m:mi>η</m:mi> <m:mo>̇</m:mo> </m:mover> </m:mrow> <m:mo stretchy=false>∣</m:mo> </m:mrow> <m:mrow> <m:mo stretchy=false>(</m:mo> <m:mi>ω</m:mi> <m:mo stretchy=false>)</m:mo> </m:mrow> </m:math> | dot{eta }| (omega ) which, respectively, have the following values: 0.28–57.63, 0.15–34.38, 0.39–67.12, and 1.82–831.08 Pa s. These macromolecules have a negative charge on their surface. Rheological properties and emulsifying activity are significantly influenced by the structural composition and physicochemical properties." @default.
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- W4286543228 date "2022-01-01" @default.
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- W4286543228 title "Structure of pumpkin pectin and its effect on its technological properties" @default.
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- W4286543228 doi "https://doi.org/10.1515/arh-2022-0124" @default.
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