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HPLC-ELSD法测定卵磷脂片中的磷脂酰乙醇胺和蛋黄磷脂酰胆碱

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中国医药工业杂志 2024年第2期55卷 271-274,282页

作者：吴盼盼王春贺姜晓菊岳云飞王常禹黑龙江省药品检验研究院黑龙江哈尔滨150088

建立了HPLC-ELSD法测定卵磷脂(1)片中的磷脂酰乙醇胺(2)和蛋黄磷脂酰胆碱(3)。采用CAPCELL PAK C_(18)色谱柱(4.6 mm×250 mm,5μm),以甲醇、水、冰乙酸和三乙胺(体积比85∶15∶0.45∶0.05)为流动相A,以正己烷、异丙醇和流动相A(体积比2... 详细信息

建立了HPLC-ELSD法测定卵磷脂(1)片中的磷脂酰乙醇胺(2)和蛋黄磷脂酰胆碱(3)。采用CAPCELL PAK C_(18)色谱柱(4.6 mm×250 mm,5μm),以甲醇、水、冰乙酸和三乙胺(体积比85∶15∶0.45∶0.05)为流动相A,以正己烷、异丙醇和流动相A(体积比20∶48∶32)为流动相B,梯度洗脱。结果显示,2、3分别在2~50和20~400μg/mL内线性关系良好,平均加样回收率(n=6)分别为102.9%和106.6%,RSD分别为2.6%和1.4%。含量测定结果显示,6批1片中,2和3的含量分别为每片1.5~5.0和40.0~65.0 mg。建立的方法具有良好的专属性、准确性,可用于1片中2和3的测定。

关键词：卵磷脂片磷脂酰乙醇胺蛋黄磷脂酰胆碱 HPLC-ELSD 含量测定

Renovation Record of the West Yellow Temple

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China's Tibet 2009年第5期20卷 40-45页

作者： wang changyu

The West Yellow Temple is the earliest Tibetan Buddhist temple in *** during the Qing Dynasty,it has been the residence of Dalai Lamas and Panchen Lamas throughout this history.

关键词：改造佛教寺庙地方政府中央政府国家保护喇嘛连接

2022—2023年中医病因病机学说研究进展

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中国中医基础医学杂志 2024年第7期30卷 1135-1140页

作者：王常煜李汪张逸雯李海玉贾海骅卢红蓉中国中医科学院中医基础理论研究所北京100700

中医病因病机学是中医基础理论的重要组成部分,近年来引起学术界的广泛关注。2022—2023年,中医病因学说中的外因研究主要集中在六淫概念内涵、六淫致病机理以及六淫、疫邪、毒邪的区别。内伤病因研究侧重于情志内伤的生物学内涵,饮食... 详细信息

中医病因病机学是中医基础理论的重要组成部分,近年来引起学术界的广泛关注。2022—2023年,中医病因学说中的外因研究主要集中在六淫概念内涵、六淫致病机理以及六淫、疫邪、毒邪的区别。内伤病因研究侧重于情志内伤的生物学内涵,饮食不节、饮食偏嗜等致病临床机理等;病理产物性病因研究则多集中于浊毒、毒邪、痰湿、瘀血、伏邪等方面。中医病机学说研究则对基本病机内涵、病机与辨证方法的关系、常见疾病的创新性病机理论如“主-客-交”“虚-痰瘀-毒”等进行了重点关注。

关键词：中医病因病机六淫主-客-交

Poverty Alleviation up Close and Personal

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China Today 2019年第2期68卷 63-65页

作者： wang changyu 不详

APRIL is a month of azalea blossoms in Bijie,a remote city in southwestern China’s Guizhou *** heavy suitcases,I set off for the small city I had never heard of before some 1,000 km away from Xi’an.I wasn’t going t... 详细信息

关键词： APRIL Poverty Alleviation up Close Personal

Enhanced gas production and CO_(2) storage in hydrate-bearing sediments via pre-depressurization and rapid CO_(2) injection

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Chinese Journal of Chemical Engineering 2024年第3期67卷 126-134页

作者： Hongnan Chen Yifei Sun Bojian Cao Minglong wang Ming wang Jinrong Zhong changyu Sun Guangjin Chen State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China School of Chemistry and Chemical Engineering Changsha University of Science&TechnologyChangsha 410114China

Carbon emission reduction and clean energy development are urgent demands for mankind in the coming *** an efficient CO_(2) storage method can significantly reduce CO_(2) emissions in the short *** this study,we attempted to construct sediment samples with different residual CH_(4) hydrate amounts and reservoir conditions,and then investigate the potentials of both CO_(2) storage and enhanced CH_(4) recovery in depleted gas hydrate deposits in the permafrost and ocean zones,*** results demonstrate that CO_(2) hydrate formation rate can be significantly improved due to the presence of residual hydrate seeds;However,excessive residual hydrates in turn lead to the decrease in CO_(2) storage *** by the T-P conditions of the reservoir,the storage amount of liquid CO_(2) can reach 8 times that of gaseous CO_(2),and CO_(2) stored in hydrate form reaches 2-4 ***,we noticed two other advantages of this *** is that CO_(2) injection can enhance CH_(4) recovery rate and increases CH_(4) recovery by 10%-20%.The second is that hydrate saturation in the reservoir can be restored to 20%-40%,which means that the solid volume of the reservoir avoids serious ***,this is crucial for protecting the goaf *** summary,this approach is greatly promising for high-efficient CO_(2) storage and safe exploitation of gas hydrate.

关键词： Hydrate Depressurization CO_(2) storage CH_(4) production Reservoir remediation

OPTIMAL　VALUE　FUNCTIONS　IN　MATHEMATICAL　PROGRAMMING　AND　CONVERGENCE　FOR　GRADIENT　PROJECTION　METHOD

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Systems Science and Mathematical Sciences 1994年第3期7卷 261-269页

作者： wang changyu ZHAO Fuan (InStitute of OR, Qufu Normal University, Qufu 273165, China)

ＯＰＴＩＭＡＬＶＡＬＵＥＦＵＮＣＴＩＯＮＳＩＮＭＡＴＨＥＭＡＴＩＣＡＬＰＲＯＧＲＡＭＭＩＮＧＡＮＤＣＯＮＶＥＲＧＥＮＣＥＦＯＲＧＲＡＤＩＥＮＴＰＲＯＪＥＣＴＩＯＮＭＥＴＨＯＤ￥ＷＡＮＧＣｈａｎｇｙｕ；ＺＨＡＯＦｕａｎ... 详细信息

ＯＰＴＩＭＡＬＶＡＬＵＥＦＵＮＣＴＩＯＮＳＩＮＭＡＴＨＥＭＡＴＩＣＡＬＰＲＯＧＲＡＭＭＩＮＧＡＮＤＣＯＮＶＥＲＧＥＮＣＥＦＯＲＧＲＡＤＩＥＮＴＰＲＯＪＥＣＴＩＯＮＭＥＴＨＯＤ￥ＷＡＮＧＣｈａｎｇｙｕ；ＺＨＡＯＦｕａｎ（ＩｎＳｔｉｔｕｔｅｏｆＯＲ，Ｑｕ...

关键词： Optimal value function indicator function directional derivative projection gradient algorithm convergence exact penalty function.

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适用于覆盖层钻探的便携式钻机改型设计

地质装备 2024年第1期25卷 1-6页

作者：姚震桐项洋曾立新王昶宇朱看远薛向宇尚丽长江岩土工程有限公司武汉430015 陕西太合智能钻探有限公司西安710016

当前工程地质勘察主要使用XY系列立轴钻机,在偏远、交通不便和地表环境复杂地区开展作业时往往搬迁困难,费时费力。与立轴钻机相比,便携式钻机既考虑了轻便化,又保证了足够的给进行程,近十年来备受关注,成为众多勘察单位的意向机型。便... 详细信息

当前工程地质勘察主要使用XY系列立轴钻机,在偏远、交通不便和地表环境复杂地区开展作业时往往搬迁困难,费时费力。与立轴钻机相比,便携式钻机既考虑了轻便化,又保证了足够的给进行程,近十年来备受关注,成为众多勘察单位的意向机型。便携式钻机在坚硬完整的地层中的施工效率较高,但在近地表第四纪覆盖层中,由于地层缩径、卡钻现象频繁,往往存在扭矩不足、处理事故能力不足等问题。本文针对便携式钻机应用在覆盖层钻探中的适应性问题,采用模块化设计方法,对便携式钻机进行改型设计。通过改进动力头结构、在孔口增设搓管机等方式,新型便携式钻机具备了振动钻进和跟管钻进功能,用于第四纪松散覆盖层等复杂地层取心钻进的能力大幅提升。

关键词：便携式钻机工程地质勘察覆盖层钻进跟管钻进

Effects of potassium lactate on sensory attributes,bacterial community succession and biogenic amines formation in Rugao ham

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Food Science and Human Wellness 2024年第1期13卷 198-210页

作者： Renyong Liao Ying wang Qiang Xia changyu Zhou Fang Geng Daodong Pan Jinxuan Cao State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products Key Laboratory of Animal Protein Food Processing Technology of Zhejiang ProvinceNingbo UniversityNingbo 315211China Meat Processing Key Laboratory of Sichuan Province School of Food and Biological EngineeringChengdu UniversityChengdu 610106China School of Food and Health Beijing Technology and Business UniversityBeijing 100048China

To deepen the understanding in the effect of potassium lactate on the sensory quality and safety of Rugao ham,sensory attributes,physicochemical parameters,total volatile basic nitrogen(TVBN),microorganism community and biogenic amines of Rugao ham manufactured with different potassium lactate levels(0%,0.5%,1%,2%)were investigated;the relationship between microbial community and the formation of TVBN and biogenic amines was further *** the increase of potassium lactate from 0%to 2%,the increased sensory scores and the decreased total aerobic bacterial count and TVBN were observed;the abundance of Staphylococcus increased,while the content of Halomonas *** effect size(LEf Se)and correlations analysis showed that Staphylococcus equorum and Lactobacillus fermentum could be the key species to improve sensory scores and decrease biogenic amines and *** pathway analysis further showed that amino acids metabolism and nitrogen metabolism were mainly involved in decreasing TVBN and biogenic amines in the treatment of 2%potassium lactate.

关键词： Rugao ham Potassium lactate Biogenic amines Microbial community Metabolic pathways

Rate-limiting factors in hydrate decomposition through depressurization across various scales:A mini-review

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Chinese Journal of Chemical Engineering 2024年第3期67卷 206-219页

作者： Xian Sun Peng Xiao Qinfeng Shi Lingban wang Zhenbin Xu Yuhao Bu Xiaohui wang Yifei Sun changyu Sun Guangjin Chen State Key Laboratory of Heavy Oil Processing China University of Petroleum(Beijing)Beijing 102249China Jining University Jining 273115China

Natural gas hydrate is an energy resource for methane that has a carbon quantity twice more than all traditional fossil fuels ***,their practical application in the field has been limited due to the challenges of long-term preparation,high costs and associated *** studies,on the other hand,offer a safe and cost-effective means of exploring the mechanisms of hydrate dissociation and optimizing exploitation *** hydrate decomposition is a complicated process along with intrinsic kinetics,mass transfer and heat transfer,which are the influencing factors for hydrate decomposition *** identification of the rate-limiting factor for hydrate dissociation during depressurization varies with the scale of the reservoir,making it challenging to extrapolate findings from laboratory experiments to the actual *** review aims to summarize current knowledge of investigations on hydrate decomposition on the subject of the research scale(core scale,middle scale,large scale and field tests)and to analyze determining factors for decomposition rate,considering the various research scales and their associated influencing factors.

关键词： Gas hydrate Rate-limiting factors Research scale Depressurization Decomposition