首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   112篇
  完全免费   32篇
  药学   144篇
  2020年   2篇
  2019年   14篇
  2018年   16篇
  2017年   11篇
  2016年   4篇
  2015年   10篇
  2014年   13篇
  2013年   10篇
  2012年   10篇
  2011年   16篇
  2010年   13篇
  2009年   4篇
  2008年   7篇
  2007年   9篇
  2006年   2篇
  2005年   3篇
排序方式: 共有144条查询结果,搜索用时 31 毫秒
1.
高血压病中医分型的代谢组学研究   总被引:8,自引:0,他引:8  
目的:将传统中医辨证方法同现代系统生物学理论相结合,探讨原发性高血压辨证分型与基于GC/MS的血清代谢组学的关系。方法:原发性高血压辨证分为肝火亢盛、痰湿雍盛及阴虚阳亢三型。应用GC/MS测定健康人及原发性高血压病人血清内源性代谢物,并用主成分分析(PCA)、偏最小乘方分析(PLS-DA)和马氏距离(MD)分析他们的代谢谱。结果:PCA和PLS-DA分析的结果表明:健康人与高血压病人血清代谢谱有明显差异,能够被区分开,但PCA和PLS-DA不能将中医高血压的三型完全分开。利用MD不仅可以清晰地区分上述三种类型的高血压,同时还显示高血压的发展过程。结论:基于GC/MS和模式识别的代谢组学在揭示传统中医理论本质上有着广泛的应用前景。  相似文献
2.
代谢组学数据处理方法——主成分分析   总被引:6,自引:0,他引:6  
代谢组学在生命科学领域得到了越来越广泛的应用并展现出良好的前景。代谢组学分析产生的含有大量变量的数据难以用常规方法进行分析,如何正确分析和解释代谢组学的数据是研究的关键。本文主要介绍了在代谢组学数据分析中占主导地位的主成分分析基本方法,旨在加强代谢组学数据分析的基础知识并规范数据分析的方法。  相似文献
3.
4.
药物分析信息学的理论研究与实践探索   总被引:3,自引:0,他引:3  
目的:介绍药物分析信息学的理论和应用。方法:从药物分析信息的解析与挖掘、新型智能化分析仪器的研发、药物分析信息学的最新应用等方面进行阐述。结果:药物分析信息学已取得一定进展,并在分析信息解析、分析仪器智能化、代谢组学研究等方面发挥重要作用。结论:药物分析信息学已成为现代药物分析学科中的重要内容。  相似文献
5.
6.
7.
8.
Despite an increasing application of copper nanoparticles, there is a serious lack of information concerning their impact on human health and the environment. In this study, the biochemical compositions of urine, serum, and extracts of liver and kidney tissues of rats treated with nano-copper at the different doses (50, 100, and 200 mg/kg/d for 5 d) were investigated using 1H NMR techniques with the pattern recognition methods. Serum biochemical analysis and histopathological examinations of the liver and kidney of all the rats were simultaneously performed. All the results indicated that the effects produced by nano-copper at a dose of 100 or 50 mg/kg/d were less than those induced at a higher dose of 200 mg/kg/d. Nano-copper induced overt hepatotoxicity and nephrotoxicity at 200 mg/kg/d for 5 d, which mainly involved scattered dot hepatocytic necrosis and widespread renal proximal tubule necrosis. Increased citrate, succinate, trimethylamine-N-oxide, glucose, and amino acids, accompanied by decreased creatinine levels were observed in the urine; furthermore, elevated levels of lactate, 3-hydroxybutyrate, acetate, creatine, triglycerides, and phosphatide and reduced glucose levels were observed in the serum. The predominant changes identified in the liver tissue aqueous extracts included increased lactate and creatine levels together with reduced glutamine and taurine levels, and the metabolic profile of the kidney tissue aqueous extracts showed an increase in lactate and a drop in glucose. In the chloroform/methanol extracts of the liver and kidney tissues, elevated triglyceride species were identified. These changes suggested that mitochondrial failure, enhanced ketogenesis, fatty acid β-oxidation, and glycolysis contributed to the hepatotoxicity and nephrotoxicity induced by nano-copper at 200 mg/kg/d for 5 d. An increase in triglycerides in the serum, liver and kidney tissues could serve as a potential sensitive biomarker reflecting the lipidosis induced by nano-copper. The data generated from the current study completely supports the fact that an integrated metabolomic approach is promising for the development of a rapid invivo screening method for nanotoxicity.  相似文献
9.
The prices of Angelica acutiloba Kitagawa (yamato-toki) and A. acutiloba Kitagawa var. sukiyamae Hikino (hokkai-toki) are now mainly determined according to the sensory quality determined by experts in addition to the physical properties. This method provides a low reliability result for differentiating and qualifying their qualities. In addition, the quality in terms of pharmacological efficiency is not taken into account for consideration in the ordinary sensory method. A combination of a (1)H NMR technique and a multivariate analysis was preliminarily applied for the quality evaluation of both toki roots with regard to their geographical and variety differences. A broad range of metabolites was detected by a single-run (1)H NMR spectrometry. Partial least-squares discrimination analysis (PLS-DA), a pattern recognition method, was applied to the (1)H NMR spectra of aqueous extracts of toki samples having different sensory qualities. The PLS-DA result showed a clear clustering corresponding to the cultivation area between toki samples cultivated in Hokkaido (Japan) and those cultivated in the southern part of China and the Nara prefecture (Japan), while there was no separation corresponding to the toki's variety and sensory qualities, indicating the inconsistency of the sensory evaluation result. The chemical metabolites contributing to the discrimination of toki samples in relation to pharmacological and sensory properties were reported for the first time. A reliable multivariate calibration model used to predict the sensory quality was successfully carried out by PLS regression.  相似文献
10.
临床代谢组学的研究进展   总被引:1,自引:0,他引:1  
临床代谢组学是代谢组学在临床实践中的应用,它主要研究人体不同状态下的代谢组,结合模式识别技术寻找代谢组中与疾病发生、发展、转归相关的生物标志物群,确定代谢组与健康和疾病之间的关系,从而为临床干预提供科学依据。本文主要对临床代谢组学的研究现状及存在问题做一综述。  相似文献
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号