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31 results on '"Huang, Qingde"'

26. Comparative analysis of the <italic>in-vitro</italic> antioxidant activity and bioactive compounds of flaxseed in China according to variety and geographical origin.

Author

Deng, Qianchun, Yu, Xiao, Ma, Fangli, Xu, Jiqu, Huang, Fenghong, Huang, Qingde, and Sheng, Feng

Subjects
FLAXSEED, BIOACTIVE compounds, OXIDANT status, PHENOLIC acids, PHYTOSTEROLS
Abstract

The present study aimed to use a chemometric study to compare the in-vitro antioxidant activities and bioactive compounds of flaxseed based on the variety and geographical origins, and further explore the specific components constructed the endogenous antioxidant system of flaxseed in China. The differential contents of α-linolenic acid (35.83-58.91%), lignans (11.37-33.31 mg/g), total phenolic acids (109.93-246.88 mg/100 g) and phytosterols (56.52-125.12 mg/g) of 32 flaxseed varieties were observed. Concomitantly, the in-vitro antioxidant activities varied from 32.56 to 46.22 mg TE/100 g, 0.58 to 1.08 mg TE/g, and 14.22 to 36.14 mmol TE/g as determined by the 2,2’-diphenyl-1-picrylhydrazyl radical (DPPH), ferric reducing antioxidant power (FRAP) and 2,2′-azinobis-(3-ethylbenzthiazoline 6-sulfonic acid) (ABTS) assays, respectively. Significant correlations were found between the antioxidant activities and contents of free syringic acid, p-coumaric acid glucoside and secoisolariciresinol diglucoside (SDG) (p < 0.01). Principal component analysis showed a relatively dispersed distribution between samples, which was not effective enough to determine the geographical origins of the flaxseed samples. Hierarchical cluster analysis allowed flaxseed samples to be grouped based on their in-vitro antioxidant activities and bioactive component contents, primarily in relation to variety specificity. [ABSTRACT FROM AUTHOR]

Published
2017
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28. Long-Term Dietary Alpha-Linolenic Acid Supplement Alleviates Cognitive Impairment Correlate with Activating Hippocampal CREB Signaling in Natural Aging Rats

Author

Gao, Hui, primary, Yan, Peipei, additional, Zhang, Shun, additional, Huang, Hao, additional, Huang, Fenghong, additional, Sun, Taoping, additional, Deng, Qianchun, additional, Huang, Qingde, additional, Chen, Sijing, additional, Ye, Keqiang, additional, Xu, Jiqu, additional, and Liu, Liegang, additional

Published
2015
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31. Processing technology combining degumming with oil pressing for flaxseed.

Author

Huang Qingde, Deng Qianchun, Xu Jiqu, Zhu Zhengwei, and Cao Weiwei

Abstract

In the present, oil pressing is still the main process for extracting oil from flaxseed in China, but it cannot achieve efficient utilization of functional materials in flaxseed, such as flaxseed gum and lignin secoisolariciresinol diglycoside (SDG). So a comprehensive process that produces multiple products from flaxseed needs to be developed. On the basis of the structural characteristics that the flaxseed gum is in the outermost layer of flaxseeds, the grinding degumming technology using high-speed rotating sand roller grind flaxseed surface is studied before in our laboratory. Model 150 flaxseed degumming machine was designed and manufactured according to this technology, it is composes of motor, sand roller, sieve, gum powder collector etc. Electronic motor is used in the machine to drive the sand roller with high-speed rotation inner the sieve to grind flaxseed, the gum powder flow out the sieve and is collected, the sand roller length and diameter is 800 and 146 mm, the cylindrical sieve diameter is 158 mm with uniform distribution of F1.5 mm sieve size. In this paper, the feasibility of Model 150 flaxseed degumming machine was studied. Based on that, the research work of flaxseed degumming and oil pressing co-process was carried out with the commodity flaxseed from Gansu as the research material. The results showed that: the machine was able to obtain flaxseed gum-powder successfully when flaxseed flow rate was controlled at 40 to 220 kg/h. The rate of gum-powder grinded from flaxseed was 6.5%±0.3%. The viscosity of the defatted gum-powder was (5100 ± 520) mPaos. The oil contents of flaxseed and the degummed flaxseed were 39.30%±0.25% and 41.62%±0.22%, respectively. By using the method of adding 30% flaxseed cake to degummed flaxseed, the oil of degummed flaxseed can be screw pressed successfully. The oil yield pressed from degummed flaxseed was 34.65%±0.43%, higher than that pressed twice from flaxseed (33.94% ± 0.43%)when the flaxseed was pressed with the screw pressing machine without degumming. By the combination of degumming and screw-pressing for flaxseed processing, two benefits were achieved, they were: increase number of products and high pressed oil yield. The research results can provide reference for flaxseed processing. [ABSTRACT FROM AUTHOR]

Published
2015
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