Results 1 to 10 of about 52,467 (200)
Establishment of Continuous Multi-Stage Countercurrent Water Extraction Process of Tea Saponin from Camellia Meal(油茶粕中茶皂素连续多级逆流水提工艺的建立) [PDF]
Shipin kexue jishu xuebao, 2021 In order to improve the economic value of camellia meal and make full use of the camellia meal resources, tea saponin was extracted from camellia meal by continuous multi-stage countercurrent extraction process using hot water, and the parameters of ...
WANG Jiajia(王佳佳) +5 more
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Heterologous Expression and Enzymatic Properties of N-Acetylglucosamine Deacetylase from Cyclobacterium qasimii(Cyclobacterium qasimii脱乙酰酶的异源表达及酶学性质) [PDF]
Shipin kexue jishu xuebao, 2020 Glucosamine is widely used because of its diverse biological activity. However, its industrial production requires the hydrolysis reaction with concentrated acid at high temperature. Therefore, an environmentally friendly biocatalytic method is needed to
MA Jiafei(马佳菲) +4 more
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芝麻素的超声辅助提取工艺优化Optimization of ultrasound-assisted extraction of sesamin
Zhongguo youzhi, 2022 以黑芝麻为原料，乙醇为提取溶剂，采用超声辅助提取法提取芝麻素。通过单因素试验考察了乙醇体积分数、料液比、超声功率、提取温度及提取时间对芝麻素提取率的影响，并通过响应面法优化了芝麻素的提取工艺条件。结果表明：超声辅助提取芝麻素的最佳工艺条件为乙醇体积分数60%、料液比1∶ 15、超声功率300 W、提取温度57.0 ℃、提取时间2.3 h，在最佳工艺条件下芝麻素提取率为0.449 6%。研究结果为芝麻素的开发及利用提供了理论依据。 Sesamin was extracted from black ...
黄传阳1，魏学鼎1，高盼1,2，罗质1,2，胡传荣1,2，何东平1,2 HUANG Chuanyang1, WEI Xueding1, GAO Pan1,2, LUO Zhi1,2, HU Chuanrong1,2, HE Dongping1,2
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Comparison of Three Extraction Methods about Polysaccharides of Chestnut Shell(3种方法对板栗壳多糖提取的比较) [PDF]
Shipin kexue jishu xuebao, 2013 This study investigated the optimal extraction conditions of chestnut shells' polysaccharides by utilizing three different methods, ultrasonic extraction,water extraction, and alkali extraction.
LIU Qi(刘 齐) +4 more
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Zhongguo youzhi, 2023 为解决富硒米糠蛋白提取率低、提取时间长及提取后功能特性下降等问题，以脱脂富硒米糠粉为原料，通过单因素试验和正交试验对超声-微波协同提取富硒米糠蛋白的工艺进行优化，通过与超声辅助法、微波辅助法和碱提法比较，探究该提取方法对富硒米糠蛋白的提取效果、抗氧化活性以及提取后米糠颗粒表面形貌变化的影响。结果表明，超声-微波协同提取富硒米糠蛋白的最佳工艺条件为超声功率600 W、微波功率500 W、提取时间20 min、料液比1∶ 40，在此条件下富硒米糠蛋白的提取率为86.94%，与超声辅助法、微波辅助法 ...
贺远锐1，谢勇1，陈朝军1，刘雄1,2，王群3HE Yuanrui1, XIE Yong1, CHEN Zhaojun1, LIU Xiong1,2, WANG Qun3
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超声提取-高温燃烧吸收-离子色谱法测定纺织品中可吸附有机卤化物
Se pu = Chinese journal of chromatography, 2022 建立了一种对纺织品中可吸附有机卤化物(AOX)的超声提取-高温燃烧吸收-离子色谱定量检测分析新方法。该方法采用超声方式提取纺织品中的AOX,提取液加入活性炭进行振荡吸附,并用酸性硝酸钠溶液对无机卤化物进行去除。采用程序升温的氧化燃烧方式对吸附AOX的活性炭进行裂解、燃烧及气化,其产生的卤化氢等气体随载气进入吸收液并完全转化为无机卤素阴离子,采用离子色谱分离测定,外标法定量。实验优化了超声提取时间、活性炭用量、燃烧气及其流量、燃烧升温程序、吸收液和吸收方式等前处理条件,并对离子色谱的仪器分析条件如色谱柱 ...
Youchao Ding +6 more
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加速溶剂提取-同位素稀释-高分辨气相色谱-高分辨质谱法测定生物样品中82种多氯联苯
Se pu = Chinese journal of chromatography, 2022 我国水产品中多氯联苯(PCBs)的检测方法,主要以6种指示性PCBs和12种二噁英类共平面PCBs为主,仅涵盖有限的PCBs。为更全面地获得生物体中PCBs的浓度水平,深入探讨PCBs在生物体内的代谢和富集特征,进而准确评价PCBs对人类的暴露水平及风险,以鱼和贝类作为生物样品代表,建立了加速溶剂提取-同位素稀释-高分辨气相色谱-高分辨质谱(ASE-ID-HRGC-HRMS)测定生物样品中82种PCBs的方法。比较了振荡提取和加速溶剂提取两种提取方式的回收率和重复性,最终采用正己烷-二氯甲烷(1∶1 ...
Yinju Wu +5 more
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Optimization of Flavanone Extraction from Peanut Shell by Ultrasonic Wave(超声波辅助提取花生壳中黄酮的工艺研究) [PDF]
Shipin kexue jishu xuebao, 2014 The effects of sample-liquid ratio, extraction temperature, extraction time, and extraction power on the yield of flavanone from peanut shell were investigated using the single factor experiment and orthogonal test.
ZHOU Jinying(周巾英) +6 more
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Zhongguo youzhi, 2023 旨在为油莎豆油的高效提取提供参考，以油莎豆为原料，采用动态超高压微射流辅助正己烷提取油莎豆油，通过单因素试验研究了微射流压力、提取温度和提取时间对油莎豆油得率的影响，并采用响应面试验对提取工艺进行优化；对比了动态超高压微射流辅助正己烷提取与单一正己烷提取对油莎豆油得率的影响，并对油莎豆油的品质进行了分析。结果表明：动态超高压微射流辅助正己烷提取油莎豆油的最佳工艺条件为微射流压力110 MPa、提取温度50 ℃、提取时间7 min，在此条件下油莎豆油得率为22.81%；与单一正己烷提取相比 ...
张彩芳1，丁昱婵1,2，秦令祥1,2 ZHANG Caifang1，DING Yuchan1,2，QIN Lingxiang1,2
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基于高效液相色谱定量指纹图谱和液相色谱-质谱联用定量的酸枣仁提取物质量考察
Se pu = Chinese journal of chromatography, 2021 酸枣仁具有显著的改善睡眠和抗焦虑等作用,其提取物在助眠类功能食品开发中应用前景广阔。但目前市场上酸枣仁提取物质量参差不齐,缺乏统一标准,企业在使用时面临较大的质量风险,因此亟须建立一种准确、全面的内控质量评价方法。针对酸枣仁提取物中黄酮和皂苷两类主要活性成分紫外响应差异巨大且水提物中皂苷成分含量低的问题,该研究建立了酸枣仁水提物HPLC定量指纹图谱方法,共标定了8个共有峰。通过对照品指认、文献比对以及高效液相色谱-四极杆飞行时间质谱数据解析,8个共有峰均为黄酮类化合物 ...
Xiujie Guo +8 more
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