全文获取类型
收费全文 | 3228篇 |
免费 | 195篇 |
国内免费 | 279篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 7篇 |
妇产科学 | 14篇 |
基础医学 | 290篇 |
口腔科学 | 32篇 |
临床医学 | 120篇 |
内科学 | 510篇 |
皮肤病学 | 97篇 |
神经病学 | 35篇 |
特种医学 | 64篇 |
外科学 | 61篇 |
综合类 | 556篇 |
预防医学 | 457篇 |
眼科学 | 10篇 |
药学 | 483篇 |
中国医学 | 905篇 |
肿瘤学 | 57篇 |
出版年
2024年 | 5篇 |
2023年 | 44篇 |
2022年 | 102篇 |
2021年 | 163篇 |
2020年 | 72篇 |
2019年 | 60篇 |
2018年 | 58篇 |
2017年 | 92篇 |
2016年 | 86篇 |
2015年 | 138篇 |
2014年 | 218篇 |
2013年 | 275篇 |
2012年 | 217篇 |
2011年 | 217篇 |
2010年 | 195篇 |
2009年 | 172篇 |
2008年 | 148篇 |
2007年 | 115篇 |
2006年 | 126篇 |
2005年 | 125篇 |
2004年 | 121篇 |
2003年 | 90篇 |
2002年 | 91篇 |
2001年 | 78篇 |
2000年 | 75篇 |
1999年 | 121篇 |
1998年 | 47篇 |
1997年 | 79篇 |
1996年 | 78篇 |
1995年 | 47篇 |
1994年 | 51篇 |
1993年 | 26篇 |
1992年 | 15篇 |
1991年 | 22篇 |
1990年 | 21篇 |
1989年 | 20篇 |
1988年 | 14篇 |
1987年 | 11篇 |
1986年 | 10篇 |
1985年 | 16篇 |
1984年 | 15篇 |
1983年 | 6篇 |
1982年 | 4篇 |
1981年 | 1篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1977年 | 3篇 |
1976年 | 3篇 |
1973年 | 1篇 |
排序方式: 共有3702条查询结果,搜索用时 93 毫秒
1.
《Saudi Pharmaceutical Journal》2022,30(11):1572-1588
Non-alcoholic fatty liver disease (NAFLD) is one of the most common complications of a metabolic syndrome caused by excessive accumulation of fat in the liver. Orthosiphon stamineus also known as Orthosiphon aristatus is a medicinal plant with possible potential beneficial effects on various metabolic disorders. This study aims to investigate the in vitro inhibitory effects of O. stamineus on hepatic fat accumulation and to further use the computational systems pharmacology approach to identify the pharmacokinetic properties of the bioactive compounds of O. stamineus and to predict their molecular mechanisms against NAFLD. Methods: The effects of an ethanolic extract of O. stamineus leaves on cytotoxicity, fat accumulation and antioxidant activity were assessed using HepG2 cells. The bioactive compounds of O. stamineus were identified using LC/MS and two bioinformatics databases, namely the Traditional Chinese Medicine Integrated Database (TCMID) and the Bioinformatics Analysis Tool for the Molecular Mechanism of Traditional Chinese Medicine (BATMAN-TCM). Pathway enrichment analysis was performed on the predicted targets of the bioactive compounds to provide a systematic overview of the molecular mechanism of action, while molecular docking was used to validate the predicted targets. Results: A total of 27 bioactive compounds corresponding to 50 potential NAFLD-related targets were identified. O. stamineus exerts its anti-NAFLD effects by modulating a variety of cellular processes, including oxidative stress, mitochondrial β-oxidation, inflammatory signalling pathways, insulin signalling, and fatty acid homeostasis pathways. O. stamineus is significantly targeting many oxidative stress regulators, including JNK, mammalian target of rapamycin (mTOR), NFKB1, PPAR, and AKT1. Molecular docking analysis confirmed the expected high affinity for the potential targets, while the in vitro assay indicates the ability of O. stamineus to inhibit hepatic fat accumulation. Conclusion: Using the computational systems pharmacology approach, the potentially beneficial effect of O. stamineus in NAFLD was indicated through the combination of multiple compounds, multiple targets, and multicellular components. 相似文献
2.
A survey of plants used as wild vegetables was conducted in four districts of Botswana in August and September 2005. The objective was to determine which wild plants were used as vegetables in the study area, and to document their cooking and preservation methods. Fourteen species representing seven families were mentioned as wild vegetables. In addition, six species from four families had other uses in traditional medicine. The implications of the documented processing methods on the retention of nutrients in the vegetables are discussed. 相似文献
3.
4.
介绍了蓬辣滩水电站泄洪闸门的状况、计算机监控系统改造方案的结构和特点及闸门定轮轴承的改造情况,通过上述改造,提高了泄洪设备运行的自动化水平,同时也为其他闸门工程提供参考。 相似文献
5.
This study attempts to demonstrate the existence of allergic contact dermatitis from grass, and to develop a patch test series to screen patients with grass intolerance. 6 common grass species from lawns and military training areas were collected. Solvent extracts of polar. non-polar and volatile fractions were prepared and used for patch testing in 20 control subjects and 46 patients with a history of grass intolerance. The 20 control had negative responses to patch testing. 5 out of 46 patients had positive patch tests to Axonopus compressus (carpet grass). Ischaenmum muticum (sea-shore centipede grass). Imperata evlindrica (lalang). Panicum maximum (Guinea grass) and Pennisetum purpureum (elephant grass). Reactions to the non-polar fraction for all 5 species were noted. This study demonstrates the existence of allergic contact dermatitis from various common species of grass. In our series, this is seen in 11% of those with a history of grass intolerance. 相似文献
6.
K. CHEUNG R. URECH L. TAYLOR P. DUFFY D. RADFORD 《Journal of paediatrics and child health》1991,27(5):312-313
The potential application of the Digoxin Fab antibody (Wellcome Digibind) in the clinical management of plant poisoning was investigated. The cardiac glycoside contents of various Australian plants were studied using immunoassay techniques. The cross-reactions of the Fab antibody and two digoxin assay antibodies against extracts of these plants were also studied. Results obtained indicated that the Digibind antibody cross-reacted with a wide range of glycosides contained in Australian plants and therefore could be of use in the treatment of life-threatening plant poisoning. 相似文献
7.
植物神经功能失调多见于一些中青年女性 ,临床症状表现为心悸、心前区不适、脉压差小、心电图示 T波异常 ,口服硝酸甘油可缓解 ,体格检查未发现异常 相似文献
8.
目的探讨3H-TdR掺入法在进行SMMC-7721系细胞肿瘤药敏试验实验时的最佳实验条件.方法确定出3H-TdR掺入法药敏实验时的最适细胞浓度、最适实验药物浓度、3H-TdR掺入最适时间;在最适条件下采用3H-TdR掺入法测定肝癌SMMC-7721细胞株对临床常用的9种抗癌药物的敏感性.结果应用3H-TdR掺入法检测肝癌SMMC-7721细胞株药敏试验的最适实验细胞浓度为1×104个/孔,最适试验药物浓度为1×PPC,3H-TdR最适掺入时间为收集细胞前8 h;肝癌SMMC-7721细胞株对DDP、ADM、5-FU、CPT高度敏感,对MTX、VP-16、MMC、NVB低度敏感,对PYM不敏感.结论 3H-TdR掺入法可用于肿瘤药物敏感性测定并确定出它的最适实验条件. 相似文献
9.
10.
Leukemia clusters around nuclear facilities in Britain 总被引:1,自引:0,他引:1
Brian McMahon 《Cancer causes & control : CCC》1992,3(3):283-288
He bas been retained for the defense by British Nuclear Fuelsplc in two suits in which leukemia and non-Hodgkin's lymphoma have been alleged to result from radiation exposures due to the operation of the nuclear reprocessing plant at Sellafield. This paper has been sent to the senior authors of the papers reporting clusters of leukemia or other malignancy in the vicinity of nuclear facilities in Britain and their comments invited. Subject to considerations of space and CCC style, these comments will be published as submited. 相似文献