搜索结果: 1-15 共查到“工学 flavonoids”相关记录18条 . 查询时间(0.059 秒)
Optimisation of microwave-assisted extraction of flavonoids and phenolics from celery (Apium graveolens L.) leaves by response surface methodology
Box-Behnken experimental design total flavonoids total phenolics antioxidant activity
2016/12/9
The conditions for microwave-assisted extraction (MAE) of total flavonoids (TF) and total phenols (TP), and antioxidant activity from celery (Apium graveolens L.) leaves by response surface methodolog...
Impact of freezing on flavonoids/radical-scavenging activity of two onion varieties
Allium cepa L. anthocyanins flavonols domestic storage frozen onions
2015/7/28
Flavonols, anthocyanins, and radical-scavenging activity of two Portuguese onion cultivars (Branca da Póvoa, white; and Vermelha da Póvoa, red) were evaluated simulating domestic freezing conditions (...
Prediction of Total Phenolics and Flavonoids Contents in Chinese Wild Rice (Zizania latifolia) Using FT-NIR Spectroscopy
Total Phenolics Flavonoids Contents
2016/6/2
Total phenolics and flavonoids contents in Chinese wild rice were predicted using Near Infrared (NIR) spectroscopy as a rapid method. A Partial Least Square (PLS) algorithm was applied to perform the ...
Relationship between Chemical Structure and Antioxidant Function of Flavonoids
Food package Flavonoid Polyphenol Chemical structure Antioxidant activity
2010/9/8
Antioxidant activities (including photo-antioxidant activities) of flavonoids were evaluated fundamentally and kinetically for the potential to produce plastic food packages with high antioxidant perf...
Extraction, purification, and characterisation of the flavonoids from Opuntia milpa alta skin
Opuntia milpa alta skin flavonoids extraction LC-MS isorhamnetin 3-O-(2, 6-dirhamnosyl)glucoside isorhamnetin 3-O-D-rutinoside
2014/2/27
The flavonoids contained in Opuntia milpa alta skin were extracted, purified, and identified. Based on single factor experimental results, the extraction parameters were optimised by using orthogonal ...
Cytotoxic and Apoptotic Effect of Structurally Similar Flavonoids on Parental and Drug-Resistant Cells of a Human Cervical Carcinoma
apoptosis drug-resistant cells flavonoids glutathione glutathione S-transferase
2010/3/24
Flavonoids are phytochemicals characterized by a wide range of biological activities, including antioxidant activity, the ability to modulate enzyme or cell receptor activity patterns, and to interfer...
为了提高枸杞中黄酮类化合物的提取效果，通过超声波细胞粉碎仪的强化作用，对枸杞中的黄酮类化合物进行提取研究，通过单因素和正交试验确定最佳工艺参数。结果表明，最佳提取工艺参数为：乙醇体积分数80%，液料比50mL/g，超声波工作/间歇时间3s/1s，超声波功率500W，提取时间50min。在此条件下提取率达到89.87%。
酶解法提高松针黄酮抗氧化性能试验（Experiment on Enzymatic Hydrolysis to Improve in Vitro Anti-oxidative Activity of Pine Needle Flavonoids）
松针黄酮 抗氧化性能 酶法修饰
2009/8/11
研究了松针总黄酮(PNF）的抗氧化性能和酶法修饰提高PNF抗氧化性能的条件。结果发现，PNF的体外抗氧化性能很强，DPPH自由基清除效果与抗坏血酸相似，羟基自由基、超氧阴离子清除率分别约为抗坏血酸清除率的4倍、2倍，Fe3+还原能力的EC50约为抗坏血酸EC50的1/2.8。用β-葡萄糖苷酶对PNF进行酶解修饰，其最优工艺参数为：酶解温度40℃，酶添加量1/1000，底物质量浓度0.6g/L，酶解...
青钱柳叶总黄酮大孔树脂纯化工艺（Purification Process of Total Flavonoids in Cyclocarya paliurus Leaves with Macroporous Resins）
总黄酮 青钱柳叶 大孔树脂 纯化
2009/8/11
为提高青钱柳叶总黄酮的纯度，筛选适宜青钱柳叶总黄酮纯化的大孔树脂，确定青钱柳叶总黄酮纯化工艺参数，选用大孔树脂材料，采用静态与动态吸附—解吸方法对青钱柳叶总黄酮进行纯化，以吸附量与洗脱率为考察指标对树脂进行选择与工艺研究，并利用紫外可见分光光度计测量青钱柳叶总黄酮的含量。结果表明：AB—8型大孔树脂纯化效果最好，其最佳工艺为进样速度2BV/h、进样质量浓度1.0mg/mL，洗脱剂最适宜体积分数与洗...
Compositions of Anthocyanin and Other Flavonoids in Cultured Cells of Rabbiteye Blueberry （Vaccinium ashei Reade cv. Tifblue）
blueberry cultured cell anthocyanins phenolics
2009/6/18
Our blueberry cultured cells produce anthocyanins in high quantity (Nawa et al., Biosci. Biotech. Biochem., 57, 770-774, 1993). Using high performance liquid chromatography/mass spectrometry (LC-MS), ...
Effect of Flavonoids on the Differentiation of 3T3-L1 Adipocytes
3T3-L1 adipocyte differentiation flavonoid
2009/6/18
The effect of dietary flavonoids (flavone, isoflavone, flavanone, chalcone, flavonol, and flavonol derivatives) on the differentiation of 3T3-L1 adipocytes was investigated. Glycerol-3-phosphate dehyd...
Characteristics of Flavonoids in Niihime Fruit - a New Sour Citrus Fruit
flavonoid niihime fruit sour citrus fruit
2009/5/31
Niihime fruit, produced in the coastal area of the Sea of Kumano in Mie prefecture, is a new sour citrus fruit. This is the first study to examine the characteristics of the flavonoids in niihime frui...
Anti-stress Effects of Flavonoids from Buckwheat Sprouts in Mice Subjected to Restraint Stress
buckwheat sprout flavonoid antioxidant activity restraint stress
2009/5/8
We examined the effects of orally administered flavonoids isolated from buckwheat (Fagopyrum esculentum Moench) sprouts in restrained mice. These flavonoids have been shown to have antioxidant activit...
Influence of Flavonoids on the Stability of an (S)-Hydroxynitrile Lyase from Hevea brasiliensis
hydroxynitrile lyase Hevea brasiliensis stabilization
2009/3/20
The (S)-hydroxynitrile lyase from leaves of the rubber tree Hevea brasiliensis (HbHnl) (EC 4.1.2.39) catalyzes the industrially interesting formation of (S)-cyanohydrins from aldehydes or ketones and ...
Effects of Structurally Related Flavonoids on hsp Gene Expression in Human Promyeloid Leukaemia Cells
hsp genes flavonoids leukaemia
2009/3/20
Quercetin is a known specific inhibitor of hsp70 synthesis and thus might be a potent agent for enhancing the selective cytotoxicity of heat on tumour cells. A comparative analysis of the effects of q...