Optimisation of the Extraction Process and Compositional Analysis of Lipase-inhibiting Components from Morus alba L. Leaves [PDF]
In this study, on the basis of single factor experiments, the effects of raw material mass concentration, ethanol volume fraction, ultrasonic power, extraction temperature, and extraction time on the lipase inhibition activity of mulberry leaves extract ...
Daorui PANG +6 more
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Chemical composition analysis of walnut leaves and their ethanol extracts [PDF]
[Objective] This study aimed to investigate the chemical constituents of walnut leaves. [Methods] The volatile components of walnut leaves were analyzed by head-space solid micro-extraction and coupled with GC-MS.
HE Jiali +4 more
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Metabolomic Analysis of the Chemical Composition of Chongjue Luohan Tea [PDF]
To elucidate the chemical material basis of the flavor quality of Chongjue Luohan tea, four representative tea samples (Zifu, Ankang, Ping’an and Jufu teas) were analyzed by sensory evaluation and metabolomics based on ultra-high performance liquid ...
QIAN Yuanfeng, YANG Gaozhong, XU Weilin, XU Guodong, DENG Huifang, LAN Bingying, LIN Zhi, LÜ Haipeng
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Study of kinetics with respect to action of flavonoid from mulberry leaves on inhibition of activity of tyrosinase [PDF]
, 2014 采用超声波辅助法,以体积分数为60%的乙醇水溶液从新疆桑叶粉末中提取桑叶黄酮。以l-多巴为底物,采用酶动力学方法研究该提取物对酪氨酸酶的抑制作用。实验结果表明,桑叶黄酮提取物对酪氨酸酶有较强的抑制作用,其IC50为0.2 g·l-1。其对酪氨酸酶的抑制作用表现为可逆效应,抑制类型为混合型抑制,对游离酶的抑制常数(kI)和对酶-底物络合物的抑制常数(kIS)分别为366和873 Mg·l-1。dPPH实验显示新疆桑叶黄酮提取物具有一定的抗氧化作用,对dPPH自由基氧化作用相对活性的IC50为25 Mg·l-
付建红 +4 more
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Different Solvent Extracts from By-products of Corylus heterophylla Fisch. × Corylus avellana L.: Bioactivity Evaluation and Phenolic Composition Analysis by Ultra-high Performance Liquid Chromatography-Mass Spectrometry [PDF]
Phenolics were extracted from the by-products (leaves, green leafy covers, shells, branches and seed coats) of the hybrid hazelnut Corylus heterophylla Fisch. × Corylus avellana L.
SU Kexin, ZHAO Yuhong
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Investigation of the Effect of Mixed Bacteria Fermentation on the Quality of Honey Tea Wine Based on E-Nose and HS-SPME-GC-MS [PDF]
In order to develop a new type of high-quality honey tea wine, a mixed culture of Saccharomyces cerevisiae and non-Saccharomyces cerevisiae was employed for the fermentation of honey tea wine.
Dongdong MU +8 more
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Extraction Optimization of Flavonoid Compounds from Various Parts of Camellia japonica and Constituent Analysis of the Extracts [PDF]
Objective: To optimize the extraction amount of flavonoid from petals, leaves, stamens and pistils of Camellia japonica, respectively, and compare the antioxidant activity and analyze the chemical constituents of the extracts.
Chuang DENG +3 more
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Analysis of the Material Basis of Uric Acid-Lowering Activity of Gynura procumbens Extracts [PDF]
In order to investigate the material basis of the uric acid-lowering activity of Gynura procumbens, G. procumbens extracts obtained by hot reflux extraction with different ethanol concentrations (0%, 30% and 70%) were evaluated for bioactive ingredients,
MA Wenjing, FU Guiming, ZHAO Fuqiang, LIN Suqin, WAN Yin
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Effects of UV-B Irradiation Time on Fruit Quality and Flavonoid Metabolites of Wine Grapes [PDF]
In order to explore the effect of UV-B irradiation time on the fruit quality and flavonoids of Cabernet Sauvignon wine grape, the experiment set up four gradients of UV-B irradiation for 2, 4, 6 and 8 h each day, with no UV-B irradiation as the control ...
Ruimin NIU +4 more
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Progress of Research on Extraction, Function and Application of Moringa oleifera Polyphenols [PDF]
Moringa oleifera is a perennial medicinal and edible plant, and polyphenols as one of its main active ingredients. This study reviews the current status of development of the polyphenol types and contents of different parts, polyphenol extraction methods,
Jing XIE +7 more
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