Junqing Qian

Magnetic nanoparticles immobilized thrombin ligand fishing to screen thrombin inhibitors in natural products

Hui Guo, Lili Guo, Jianwei Yu, Fengju Zhao et autres

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Comparison of improvement in learning and memory ability of walnut oil extracted by aqueous enzymatic extraction and cold pressing extraction

Junqing Qian, Qian Li, Luyan Mo, Xiaohua Zhao et autres

Abstract Rich in unsaturated fatty acids, walnut oil provides a number of physiological benefits, including a reduction in the risk of cardiovascular disease and a delay in the aging process. In this work, walnut oil was prepared using the aqueous enzyme process …

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Preparation of porous starch from native starch by using fungal amylase and evaluation of its adsorption property on natural pharmacodynamic compounds

Junqing Qian, Haiyan Yang, Chenghong Mo, Yan Chen et autres

Abstract Due to the reliable safety of starch, it has a wide range of applications in pharmaceutical fields and food sectors. Enzymatic preparation of porous starch can better maintain the properties of starch and expand its applications, which indicates that the research …

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NMR detection of fatty acids content in walnut oil and compared with liquid chromatography

Junqing Qian, Changyan Zhao, Hanxiao Zhu, Jun Tong et autres

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Enantioseparation of ondansetron by countercurrent chromatography using sulfobutyl ether‐β‐cyclodextrin as chiral selector

Wenyu Sun, Honglei Bao, Junqing Qian, Shengqiang Tong

Ondansetron, a highly selective 5-hydroxytryptamine 3 receptor antagonist, was successfully enantioseparated by recycling countercurrent chromatography using sulfobutyl ether-β-cyclodextrin as chiral selector. Important factors for the enantioseparation were optimized, including different organic solvent, type of substituted β-cyclodextrin, pH of aqueous phase, concentration of …

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Pretreatment Camellia Seeds by Protease and Application to Extraction of Camellia Oil

Junqing Qian, Xiaohua Zhao, Changyan Zhao, Haiyan Yang et autres

Abstract High‐temperature pretreatment that is currently used in camellia oil extraction can have negative effects on the quality of camellia oil. In this study, the enzymatic pretreatment of camellia seeds is explored as an alternative to high‐temperature pretreatment. The main conditions for …

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Electrochemical Detector Based on Nafion Membrane for Online Monitoring of Column Chromatography Purification Process

Yuhang Tang, Wenhan Liu, Yuanjie Teng, Junqing Qian et autres

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Separation and analysis of EGCG from crude tea polyphenols by high-speed countercurrent chromatography

Huawei Zhang, Junqing Qian

In order to establish a novel technique of separation and analysis of EGCG from tea polyphenols using high-speed countercurrent chromatography (HSCCC), a set of HSCCC apparatus was applied to isolate and purify EGCG from tea polyphenols using two-phase solvent system composed of …

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Preparation and Study on Release Rate in Vitro for Sustained-release Tablets of Simvastatin

Junqing Qian

OBJECTIVE To prepare gel matrix sustained-release tablets of simvastatin and examine the factors affecting drug release rates.METHODS Assay the release rates in vitro by UV spectrophotometry,prepare the sustained-release tablets by wet granulation squash method with hydroxypropyl methyl cellulose(HPMC) as matrix material,examine the …

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The properties and kinetics of enzymatic reaction in the process of the enzymatic extraction of fish oil

Junqing Qian, Zhang Hongyong, Qiyuan Liao

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Optimization of Extraction of Alkaloids from Corydalis yanhusuo W.T. Wang by Response Surface Methodology

Shang Xiao-jin, Junqing Qian, Hui Guo

For improving the yield of alkaloids from Corydalis yanhusuo W.T.Wang,response surface methodology was adopted to optimize the extraction process.The effects of different parameters on yield and purity of alkaloid were studied.Based on response surface methodology,the extraction conditions on the basis of single …

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吸着プロセスによるレシチンの精製技術の研究【JST・京大機械翻訳】

Junqing Qian, L Jianfang, Yang Lanhua