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Tracing the geographical origin of early potato tubers using stable hydrogen isotope ratios of methoxyl groups.

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The application of stable isotope ratio measurements has become an extremely useful tool for tracing the provenance of food products, thus ensuring that consumers receive products which comply with their labelled specifications. Recently, it has been shown that relative stable hydrogen isotope

Optimization of Pectin Extraction from Sweet Potato Peels using Citric Acid and Its Emulsifying Properties.

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Pectin is a natural polysaccharide that has been used widely as stabilizer in food emulsion system.This study aimed to optimize the yield of pectin extracted from sweet potato residue and investigate its emulsifying

Developmental regulation of pectic epitopes during potato tuberisation.

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We show, by immunogold labelling, that potato (Solanum tuberosum L. cv Karnico) pectic epitopes are developmentally regulated within regions of the stolon, in addition to showing tissue-specific differences in abundance and localisation. The (1-->4)-beta-D-galactan and (1-->5)-alpha-arabinan

Optimization of ultrasound-microwave assisted acid extraction of pectin from potato pulp by response surface methodology and its characterization.

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The ultrasound-microwave assisted HCl extraction of pectin from potato pulp was optimized using the response surface methodology. Effects of extraction temperature, pH, and time on the yield were evaluated, and structural characteristics of pectin extracted under optimal conditions were determined.

THE PROPERTIES OF SYRINGYL, GUAIACYL AND P-HYDROXYPHENYL ARTIFICIAL LIGNINS.

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1. Artificial lignins have been produced on potato parenchyma. 2. The methoxyl-free lignin and 4-hydroxy-3-methoxy (guaiacyl) lignins could be estimated by the sulphuric acid method but the 4-hydroxy-3,5-dimethoxy (syringyl) lignins could not. 3. Permanganate oxidation of isolated p-coumaric lignin

Molecular weight distribution and structural characteristics of polymers obtained from acid soluble lignin treated by oxidative enzymes.

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Brown precipitates were obtained by polymerization of low molecular weight lignin fragments contained in a model effluent. Polymerization reactions were initiated by potato-polyphenoloxidase (PPO) or horseradish peroxidase/H(2)O(2) system (HRP/H(2)O(2)). The insolubilization processes occurred after

A microbial model of mammalian metabolism: biotransformation of 4,5-dimethoxyl-canthin-6-one using Cunninghamella blakesleeana CGMCC 3.970.

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1. A filamentous fungus, Cunninghamella blakesleeana CGMCC 3.970, was applied as a microbial system to mimic mammalian metabolism of 4,5-dimethoxyl-canthin-6-one (1). Compound 1 belongs to canthin-6-one type alkaloids, which is a major bioactive constituent of a traditional Chinese medicine (the

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