全文获取类型
收费全文 | 416篇 |
免费 | 21篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 17篇 |
妇产科学 | 13篇 |
基础医学 | 24篇 |
口腔科学 | 2篇 |
临床医学 | 33篇 |
内科学 | 80篇 |
神经病学 | 8篇 |
特种医学 | 3篇 |
外科学 | 135篇 |
综合类 | 7篇 |
预防医学 | 40篇 |
眼科学 | 7篇 |
药学 | 24篇 |
中国医学 | 1篇 |
肿瘤学 | 41篇 |
出版年
2021年 | 4篇 |
2020年 | 3篇 |
2019年 | 7篇 |
2018年 | 4篇 |
2017年 | 2篇 |
2016年 | 2篇 |
2015年 | 10篇 |
2014年 | 11篇 |
2013年 | 16篇 |
2012年 | 29篇 |
2011年 | 34篇 |
2010年 | 16篇 |
2009年 | 20篇 |
2008年 | 19篇 |
2007年 | 24篇 |
2006年 | 21篇 |
2005年 | 28篇 |
2004年 | 23篇 |
2003年 | 23篇 |
2002年 | 10篇 |
2001年 | 18篇 |
2000年 | 9篇 |
1999年 | 14篇 |
1998年 | 2篇 |
1997年 | 4篇 |
1995年 | 4篇 |
1992年 | 3篇 |
1990年 | 2篇 |
1987年 | 2篇 |
1986年 | 3篇 |
1985年 | 2篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1979年 | 6篇 |
1978年 | 6篇 |
1977年 | 6篇 |
1976年 | 4篇 |
1975年 | 8篇 |
1974年 | 5篇 |
1973年 | 4篇 |
1972年 | 2篇 |
1971年 | 6篇 |
1970年 | 2篇 |
1968年 | 2篇 |
1966年 | 2篇 |
1965年 | 1篇 |
1963年 | 1篇 |
1961年 | 1篇 |
1955年 | 1篇 |
排序方式: 共有437条查询结果,搜索用时 15 毫秒
1.
National Programme of Research in Human Reproduction S.K. Banerjee R. Baveja R.V. Bhatt A. Chatterjee S.D. Choudhury B. Coyaji A.D. Engineer M.P. Gogoi V. Hingorani K. Lal M. Kochhar U. Krishna P. Misra F.S. Philips R. Rajan P.C. Sen Gupta K. Zaveri S. Datey S. Gupta S. Mehta N.C. Saxena B.N. Saxena 《Contraception》1986,34(6):573-582
The return of fertility following discontinuation of norethisterone oenanthate (NET EN) 200 mg injectable contraceptive after use for a minimum period of six months or more was studied in 69 women who discontinued the method for planning pregnancy. Former users of copper intra-uterine device (CuT 200) were enrolled as a control group. Another 161 women who had discontinued NET EN due to other reasons (e.g. amenorrhoea, excessive bleeding or personal reasons) were also studied for return of fertility after ensuring that they were not using any other method of contraception and were exposed to the risk of pregnancy. The subjects from both groups were followed for a period of one year. The cumulative conception rates at one year were 72.5 and 83.6 per 100 subjects for ex-NET EN and ex-CuT 200 users who had discontinued the method for planning pregnancy and this difference was not statistically significant (P > 0.05). The median time for conception for ex-NET EN users was 7.8 months as compared to 3.7 months in ex-CuT 200 users but the cumulative conception rates at the end of one year show that future return of fertility in NET EN users does not appear to be adversely affected.
In 51 subjects who had discontinued NET EN due to amenorrhoea, the return of fertility was predictably slower and less. The return of fertility in subjects who discontinued NET EN for other reasons (e.g. excessive bleeding and other personal reasons) was similar to ex-NET EN and ex-CuT 200 users. 相似文献
2.
Evaluation of active and passive transport processes in corneas extracted from preserved rabbit eyes
Soumyajit Majumdar Tushar Hingorani Ramesh Srirangam 《Journal of pharmaceutical sciences》2010,99(4):1921-1930
In vitro transcorneal permeability studies are an important screening tool in drug development. The objective of this research is to examine the feasibility of using corneas isolated from preserved rabbit eyes as a model for permeability evaluation. Eyes from male New Zealand White rabbits were used immediately or were stored overnight in phosphate-buffered saline (PBS) or Hanks balanced salt solution (HBSS) over wet ice. Integrity of isolated corneas was evaluated by measuring the TEER and by determining the permeability of paracellular and transcellular markers. Active transport was assessed by measuring transcorneal permeability of selected amino acids. Esterase activity was estimated using p-nitrophenyl assay. In all cases, corneas from freshly enucleated eyes were compared to those isolated from the day-old preserved eyes. Transcellular and paracellular passive diffusion was not affected by the storage medium and observed to be similar in the fresh and preserved eye models. However, amino acid transporters demonstrated lower functional activity in corneas excised from eyes preserved in PBS. Moreover, preserved eyes displayed almost 1.5-fold lower esterase activity in the corneal tissue. Thus, corneas isolated from day-old eyes, preserved in HBSS, closely mimics freshly excised rabbit corneas in terms of both active and passive transport characteristics but possesses slightly reduced enzymatic activity. © 2009 Wiley-Liss, Inc. and the American Pharmacists Association J Pharm Sci 99: 1921–1930, 2010 相似文献
3.
4.
A phase I trial and viral clearance study of reovirus (Reolysin) in children with relapsed or refractory extra‐cranial solid tumors: A Children's Oncology Group Phase I Consortium report 下载免费PDF全文
5.
6.
Robert Clarke Jonathan R Emberson Elizabeth Breeze Juan P Casas Sarah Parish Aroon D Hingorani Astrid Fletcher Rory Collins Liam Smeeth 《European heart journal》2008,29(6):800-809
AIMS: To compare the predictive value of inflammatory biomarkers and lipids for vascular and non-vascular mortality in older men. METHODS AND RESULTS: The relevance of inflammatory biomarkers and lipids for vascular and non-vascular mortality was assessed in a prospective study of 5360 men (mean age 77 years) followed for 7 years. Vascular mortality was positively associated with log C-reactive protein (lnCRP), fibrinogen and total/HDL-C (high-density lipoprotein cholesterol), and inversely associated with albumin [age adjusted hazard ratio (HR) per 2-SD higher usual level (approximately the difference between the top and the bottom thirds of the distribution): 2.09 for lnCRP; 1.70 for fibrinogen; 0.50 for albumin and 1.45 for total/HDL-C]. The associations with the inflammatory markers were attenuated after adjustment for established risk factors, including lipids [adjusted HRs: 1.86 (lnCRP); 1.44 (fibrinogen); 0.51 (albumin)], and further attenuated (and, for fibrinogen, no longer predictive) after adjustment for each other [fully adjusted HRs: 1.60 (lnCRP); 1.01 (fibrinogen); 0.61 (albumin)]. Higher CRP and lower albumin levels were also associated with significantly raised non-vascular mortality independently of other characteristics [fully adjusted HRs: 1.62 (lnCRP); 0.65 (albumin)]. CONCLUSION: In this cohort of older men, higher CRP and lower albumin levels strongly predicted both vascular and non-vascular mortality, independently of other characteristics. 相似文献
7.
8.
9.
10.
Peace D. Imani Amos Odiit Sangeeta R. Hingorani Noel S. Weiss Allison A. Eddy 《Pediatric nephrology (Berlin, Germany)》2013,28(11):2199-2206