Results 11 to 20 of about 52,467 (200)
Extraction of Chlorophyll from Watermelon Peel(西瓜皮中叶绿素提取工艺的研究) [PDF]
Shipin kexue jishu xuebao, 2018 Watermelon peel accounts about 30% of the total weight of the fruit, which is a byproduct of the processing of watermelon. The chlorophyll of the peel was extracted via the solvent extraction method and ultra high pressure assisted solvent extraction ...
SHI Yue(时月) +5 more
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利用在线加压溶剂提取-超高效液相色谱-离子阱-飞行时间-质谱法定性分析片仔癀化学成分组
Se pu = Chinese journal of chromatography, 2021 片仔癀(Pien-Tze-Huang)是由三七、牛黄、蛇胆、麝香等名贵中药经加工精制而成的中药制剂。片仔癀中的三七皂苷、胆汁酸以及麝香酮等主要化学成分已被深入研究,然而其全方化学成分组成尚未被整体阐明。该文建立了在线加压溶剂提取-超高效液相色谱-离子阱-飞行时间质谱(online PLE-UHPLC-IT-TOF-MS)法,快速、直接分析片仔癀化学成分组。将少量片仔癀粉末(0.3 mg)均匀地平铺于预柱芯尾端,之后用正相硅胶填充预柱芯,滤膜密封后构成提取池。提取池装入预柱套后置于70 ℃的柱温箱内 ...
Wei Li +6 more
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Study on Extraction and Structure of Four Kinds of Peanut Proteins(4种花生蛋白的分级提取及其结构的扫描电镜观察) [PDF]
Shipin kexue jishu xuebao, 2015 Four protein fractions (albumin, globulin, prolamine and glutelin) were fractionated from peanut meal and their surface structures were observed using scanning electron microscope.
LI Ting(李 婷) +4 more
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Se pu = Chinese journal of chromatography, 2021 亲水作用液相色谱法(HILIC)是一种用于改善强极性物质的保留和分离选择性的方法,广泛应用于药物分析、代谢组学、蛋白质组学等领域。该文利用农药分子与皂苷成分在HILIC上的保留行为差异,开发了一种农药残留脱除方法。以市售高纯人参提取物为例,该文评价了农药分子和人参皂苷在亲水色谱柱上的保留行为,并考察了上样量、淋洗体积、上样体积等因素对农残脱除效果的影响。实验结果证明:7种人参皂苷由于糖链上的羟基与亲水色谱固定相上的羧基形成氢键作用而具有较强保留,而农药分子由于亲水性较差且相对分子质量较小,保留很弱 ...
Lin-ming Sun +6 more
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Study on Extraction of Polysaccharides from Ganoderma lucidum by Hot Compressed Water and Its Antioxidant Activities(高压热水提取灵芝多糖及对其抗氧化活性的影响) [PDF]
Shipin kexue jishu xuebao, 2018 With superfine fruiting body powder of Ganoderma lucidum as raw materials, extraction temperature, extraction time, and solid-liquid ratios on the extraction of polysaccharides and the scavenging activity on DPPH radicals were investigated.
CAO Lili(操丽丽) +6 more
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Zhongguo youzhi, 2023 为促进油茶籽副产物的高值化利用，采用低共熔溶剂提取油茶籽壳中的原花青素，通过单因素试验考察了提取溶剂种类、摄取溶剂质量分数、料液比、提取温度和提取时间对原花青素得率的影响，并利用正交试验对油茶籽壳中原花青素提取的工艺条件进行优化。结果表明：低共熔溶剂提取油茶籽壳中原花青素的最优工艺条件为以氯化胆碱-柠檬酸（物质的量比1∶ 1）溶液为提取溶剂、氯化胆碱-柠檬酸溶液质量分数80%、料液比1∶ 25、提取温度80 ℃、提取时间40 min，在此条件下原花青素得率为5.26%。综上 ...
侯黔灵1，范丽美2 HOU Qianling1,FAN Limei2
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Zhongguo youzhi, 2023 为准确定量油茶籽油中三萜类物质，对分光光度法测定油茶籽油中总三萜含量的样品前处理方法进行研究。通过单因素试验和正交试验考察了乙醇体积分数、提取温度、提取时间和提取次数对油茶籽油中总三萜含量的影响。结果表明：各因素对油茶籽油中总三萜提取的影响程度从大到小依次为乙醇体积分数>提取次数>提取温度=提取时间;油茶籽油中总三萜的最佳提取工艺条件为乙醇体积分数80%、提取温度80 ℃、提取时间40 min、提取次数4次，在此条件下提取测得油茶籽油中总三萜含量为(0.78±0.06)%（以齐墩果酸计）。综上 ...
叶美金1,2，杨玉敏3，冯鸿1,2，姜虹宇1,2，何咨霆1，邱宇帆1 YE Meijin1,2, YANG Yumin3, FENG Hong1,2, JIANG Hongyu1,2, HE Ziting1, QIU Yufan1
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Optimization of Microwave-assisted Extraction Process for Total Flavonoid from Tartary Buckwheat Flour(微波辅助双水相提取苦荞麦粉中黄酮类化合物) [PDF]
Shipin kexue jishu xuebao, 2014 Flavonoids were extracted from buckwheat powder by the microwave-assisted ethanol-ammonium sulfate aqueous two-phase system. The optimal extraction system of flavonoids from tartary buckwheat powder was determined through single factor experiments and ...
XU Chunming(徐春明) +4 more
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Zhejiang Daxue xuebao. Lixue ban, 2019 为提高龙眼愈伤组织中单宁的提取率，采用超声波辅助浸提法，基于乙醇浓度（A）、超声波功率（B）与提取时间（C） 3 个单因素试验，通过响应面试验优化设计，建立了龙眼愈伤组织单宁提取工艺。研究结果表明，龙眼愈伤组织中单宁的最佳提取条件为乙醇浓度61%、超声波功率140 W，提取时间54 min，提取温度 60 ℃，在此工艺条件下，提取量为7.53 mg · g-1。
LIUShengcai(刘生财) +4 more
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Zhejiang Daxue xuebao. Lixue ban, 2010 建立小鼠急性高尿酸血症模型,通过灌胃给药考察车前草的降血尿酸作用.采用正交试验设计,以车前草所含大车前苷为指标,考察乙醇浓度、提取时间、提取次数和乙醇用量4种因素对提取结果的影响.大车前苷和血尿酸的含量均用HPLC法测定.结果表明,车前草醇提组的小鼠血清尿酸水平明显低于模型组 ...
QIANYing(钱莺) +3 more
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