Results 71 to 80 of about 5,834,879 (181)
First, He Was Adam, and Then, She Was Eve
ABSTRACT Trans* is an umbrella term that is used to describe people who identify with a gender that is different from their assigned sex at birth. There has been a marked increase in young people presenting to child and adolescent mental health services due to a lack of specialist gender clinics in the United Kingdom.
Corey Hartley +2 more
wiley +1 more source
氯酚类化合物(CPs)是典型的难降解环境持久性污染物,已被列入美国环保局和我国环保局优先控制污染物黑名单。如何去除和降解CPs是近年来的研究重点和难点。目前处理和降解CPs污染物的主要方法有:物理化学法、化学还原法、化学氧化法和生物处理法等。归纳总结了这些方法的原理和特点,重点综述了近年来在吸附与降解CPs机理方面的研究进展。
项奇 +6 more
doaj +2 more sources
广西民族大学2019年硕士研究生入学考试初试自命题科目试题:物理化学(二)
广西民族大学2019年硕士研究生入学考试初试自命题科目试题:物理化学(二);试卷代号:
广西民族大学化学化工学院
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ABSTRACT Biochemical oxygen demand (BOD) remains a core indicator of organic pollution in freshwater monitoring, but its role in water policy and practice is changing as water‐quality assessment moves toward predictive, integrative, and decision‐support approaches.
Isadora Favero Roque Cenci +5 more
wiley +1 more source
一种化学键合手性固定相及其制备方法,其特征在于使用糖肽类大环抗生素-去甲万古霉素作为手性选择剂,通过化学键合的方法将其键合于载体上。本发明适合于用作高效液相分离用色谱填料。所制得的固定相具有很强的手性识别能力和很好的稳定性能,可对多种不同类型的手性药物实现分离 ...
王俊德, 刘莺, 丁国生
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ABSTRACT This paper describes and analyzes recharge practices in Bács‐Kiskun County, Hungary, within what can be categorized as the farmer domain. Such locally embedded aquifer recharge practices remain underexplored in Hungary. Current research and funding largely focus on large‐scale Managed Aquifer Recharge (MAR) interventions emphasizing intended ...
Helen Sundberg, Michael Gilek
wiley +1 more source
目的探讨尿蛋白干化学试带法诊断孕妇子痫前期中的应用价值。方法自2014至2016年共772例孕妇纳入研究,对尿蛋白干化学试带法与24h尿蛋白定量进行相关性分析,对尿蛋白干化学试带法诊断孕妇子痫前期能力进行ROC分析 ...
柏明见, 冯京全, 冯璟, 梁国威
doaj
本发明涉及一种淫羊藿苷化学对照品的分离制备方法。以含量不低于20%的淫羊藿苷提取物为原料,经初步柱分离或醇沉除杂脱色,以制备型高效液相色谱为分离手段,以一定比例的含乙腈水溶液为洗脱体系,提取液直接减压浓缩至干即可获得纯度大于98%的淫羊藿苷化学对照品。相比已报道淫羊藿苷的分离制备方法,本发明工艺步骤简单、周期短、纯度高、色泽好,并且可大规模生产 ...
王莉, 肖红斌, 高明哲
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ABSTRACT This article examines how renewable‐energy expansion is changing water–energy bargaining among Iran, Iraq, and Türkiye in the Tigris–Euphrates basin. Much of the existing literature on transboundary water politics focuses on territorial control, upstream–downstream power asymmetries, legal rules, and hydro‐hegemony but gives less attention to ...
Umud Shokri
wiley +1 more source
本发明涉及一种羟基积雪草甙化学对照品的分离制备方法,以重量含量 30~97%的羟基积雪草甙提取物为原料,以制备型高效液相色谱为分离手段,以一定比例的甲醇-水溶液为洗脱体系,获得纯度大于98%的羟基积雪草甙化学对照品;工艺步骤有:样品预处理,色谱柱处理,进样,洗脱,在线监测,收集含有羟基积雪草甙的洗脱液,减压浓缩羟基积雪草甙洗脱液至干,即得羟基积雪草甙化学对照品。经高效液相色谱法监测,羟基积雪草甙的含量可达到98%以上 ...
肖红斌, 高明哲
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