全文获取类型
收费全文 | 619篇 |
免费 | 62篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 21篇 |
妇产科学 | 36篇 |
基础医学 | 60篇 |
口腔科学 | 5篇 |
临床医学 | 122篇 |
内科学 | 102篇 |
皮肤病学 | 3篇 |
神经病学 | 23篇 |
特种医学 | 76篇 |
外科学 | 40篇 |
综合类 | 31篇 |
预防医学 | 85篇 |
眼科学 | 6篇 |
药学 | 27篇 |
肿瘤学 | 36篇 |
出版年
2022年 | 6篇 |
2021年 | 11篇 |
2020年 | 10篇 |
2019年 | 22篇 |
2018年 | 22篇 |
2017年 | 15篇 |
2016年 | 17篇 |
2015年 | 21篇 |
2014年 | 16篇 |
2013年 | 25篇 |
2012年 | 28篇 |
2011年 | 33篇 |
2010年 | 18篇 |
2009年 | 19篇 |
2008年 | 27篇 |
2007年 | 22篇 |
2006年 | 24篇 |
2005年 | 10篇 |
2004年 | 16篇 |
2003年 | 16篇 |
2002年 | 14篇 |
2001年 | 7篇 |
2000年 | 9篇 |
1999年 | 9篇 |
1998年 | 11篇 |
1997年 | 20篇 |
1996年 | 17篇 |
1995年 | 10篇 |
1994年 | 8篇 |
1993年 | 8篇 |
1992年 | 9篇 |
1991年 | 10篇 |
1990年 | 10篇 |
1989年 | 12篇 |
1988年 | 12篇 |
1987年 | 14篇 |
1986年 | 9篇 |
1985年 | 8篇 |
1984年 | 14篇 |
1983年 | 11篇 |
1982年 | 8篇 |
1981年 | 7篇 |
1980年 | 12篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1977年 | 9篇 |
1976年 | 6篇 |
1974年 | 3篇 |
1973年 | 5篇 |
1970年 | 4篇 |
排序方式: 共有682条查询结果,搜索用时 15 毫秒
91.
Ghosh D; Stewart DR; Nayak NR; Lasley BL; Overstreet JW; Hendrickx AG; Sengupta J 《Human reproduction (Oxford, England)》1997,12(5):914-920
The present study was undertaken to assess the temporal association between
the profiles of serum concentrations of oestradiol-17beta, progesterone,
chorionic gonadotrophin (CG) and relaxin in pregnancies established
naturally, and after embryo transfer, as well as in failed pregnancies in
rhesus monkeys. In naturally mated cycles (group 1) a conception rate of
75% was obtained. In group 1, the mean day of CG detection in serum was
11.5 +/- 1.9 day post-ovulation, and for relaxin, 9.0 +/- 2.5 day
post-ovulation. In group 2, embryo transfer to synchronous, non-mated
surrogate recipients was performed; seven embryo transfer cycles yielded
three pregnancies which were allowed to continue to term and normal infants
were delivered. In embryo transfer cycles the mean day of CG detection was
14.8 +/- 1.8 day post- ovulation, and for relaxin, 11.4 +/- 2.6 day
post-ovulation. A delay of about 3 days was observed in the appearance in
circulation of CG (P < 0.05) and also of relaxin (P < 0.05) between
natural mated and embryo transfer conception cycles. Significant
differences (P < 0.05 for progesterone and P < 0.03 for oestradiol)
were obtained for the areas under the curves for progesterone and
oestradiol between days 12 and 16 in conception cycles compared with failed
pregnancies. These data provide the first observation of the normal
hormonal signals associated with maternal recognition of transferred
embryos during the peri- implantation period, and suggest that the use of
such an experimental primate embryo transfer model may help to elucidate
components of maternal and embryonic signal-response mechanisms during
embryo implantation.
相似文献
92.
93.
94.
We report two patients with acute leukaemia who received emetogenic cytotoxic drugs and were on therapeutic doses of sodium valproate for epilepsy. Neither patient reported significant nausea nor vomited at any time during the chemotherapy, at times requiring no anti-emetic treatment whatsoever. We suggest that this absence of nausea was due to an anti-emetic effect of sodium valproate. 相似文献
95.
96.
97.
Prevention of transfusion-associated graft-versus-host disease: selection of an adequate dose of gamma radiation 总被引:1,自引:0,他引:1
To determine the optimal dose of gamma radiation necessary to inhibit T- lymphocyte function and prevent transfusion-acquired graft-versus-host disease (TA-GVHD), a donor plateletpheresis component was initially divided into ten 20-mL samples. One sample was not irradiated, while the other nine samples were treated with gamma radiation at doses ranging from 500 to 4500 cGy. T-lymphocyte function was subsequently measured by mixed lymphocyte cultures and mitogen stimulation assays. The results were assessed in each test by calculating the percentage of inhibition of each irradiated sample as compared to that of the unirradiated sample. The accuracy of the delivered dose of gamma radiation was measured with thermoluminescent dosimeters. It was concluded that a nominal dose of 3000 cGy (actual dose delivered, 2898 cGy) is the appropriate amount of gamma radiation needed to eliminate T- lymphocyte-mediated graft-versus-host disease. 相似文献
98.
99.
The radiology of juxtaglomerular tumors 总被引:1,自引:0,他引:1
100.
Eighteen patients with industrial injuries to the dorsum of the proximal interphalangeal joint involving articular destruction and segmental bone loss were treated by primary bone grafting and plating. Rigid arthrodesis and preservation of functional length were obtained in 25 fingers. Of the 25 fingers, 23 fused primarily. Because of technical error, one reconstruction showed delayed consolidation and required secondary grafting before uniting; one arthrodesis became infected and healed by second intention. Additional procedures were flexor tendon repair, nerve grafting, and local or distant flap coverage. The procedure is considered valid for the treatment of extensive skeletal damage to the proximal interphalangeal joint area. 相似文献