全文获取类型
收费全文 | 37803篇 |
免费 | 2168篇 |
国内免费 | 201篇 |
专业分类
耳鼻咽喉 | 427篇 |
儿科学 | 1186篇 |
妇产科学 | 1004篇 |
基础医学 | 3805篇 |
口腔科学 | 1214篇 |
临床医学 | 3323篇 |
内科学 | 8148篇 |
皮肤病学 | 686篇 |
神经病学 | 2247篇 |
特种医学 | 1341篇 |
外国民族医学 | 4篇 |
外科学 | 6919篇 |
综合类 | 864篇 |
现状与发展 | 3篇 |
一般理论 | 27篇 |
预防医学 | 2538篇 |
眼科学 | 1364篇 |
药学 | 2907篇 |
1篇 | |
中国医学 | 269篇 |
肿瘤学 | 1895篇 |
出版年
2024年 | 39篇 |
2023年 | 417篇 |
2022年 | 1070篇 |
2021年 | 1670篇 |
2020年 | 1004篇 |
2019年 | 1275篇 |
2018年 | 1591篇 |
2017年 | 1153篇 |
2016年 | 1256篇 |
2015年 | 1357篇 |
2014年 | 1710篇 |
2013年 | 2077篇 |
2012年 | 3159篇 |
2011年 | 3038篇 |
2010年 | 1730篇 |
2009年 | 1474篇 |
2008年 | 2267篇 |
2007年 | 2333篇 |
2006年 | 2060篇 |
2005年 | 1819篇 |
2004年 | 1656篇 |
2003年 | 1382篇 |
2002年 | 1201篇 |
2001年 | 382篇 |
2000年 | 317篇 |
1999年 | 288篇 |
1998年 | 200篇 |
1997年 | 133篇 |
1996年 | 143篇 |
1995年 | 110篇 |
1994年 | 96篇 |
1993年 | 77篇 |
1992年 | 151篇 |
1991年 | 162篇 |
1990年 | 130篇 |
1989年 | 127篇 |
1988年 | 105篇 |
1987年 | 102篇 |
1986年 | 93篇 |
1985年 | 118篇 |
1984年 | 81篇 |
1983年 | 52篇 |
1982年 | 54篇 |
1981年 | 56篇 |
1980年 | 42篇 |
1979年 | 53篇 |
1978年 | 42篇 |
1975年 | 36篇 |
1974年 | 37篇 |
1973年 | 37篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
92.
Mega-Liposuction: Analysis of 1520 Patients 总被引:1,自引:0,他引:1
Ali Eed MD 《Aesthetic plastic surgery》1999,23(1):16-22
Fifteen hundred and twenty cases of liposuction/liposculpture were performed at Dr. M. Erfan & Bagedo Hospitals and King
Abdulaziz University Hospital in Jeddah from January 1983 to December 1994. These cases were mostly females. The age group
was from 16–65 years. Multiple procedures were performed in 11.68% of these cases. The change in hemoglobin and the hematocrit
ratio pre- and post-operatively, and the incidence of complications, were studied. The percentage of surface area operated
upon rather than the amount of fat removed was the most important relevant factor. 相似文献
93.
Ali A 《Health for the millions》1999,25(4):6-8
There has been considerable progress in the health situation in India over the last five decades following its independence. Mortality decreased dramatically, the death rate declined from 27.4 to 8.9, and the infant mortality rate decreased by almost half in 1997. Life expectancy, on the other hand, almost doubled from 32 years at the time of independence to 62 years in 1997. However, there are wide variations in the values of these health indicators among different regions. Progress has been uneven and confined to more advanced states. Improvements in the health status of the people have been most notable in the states of Kerala, Maharashtra, and Punjab, whereas states like Madhya Pradesh, Uttar Pradesh, Orissa and Rajasthan had the least progress. These neglected areas are considered as the result of various factors in India's political economy, which hinders health policy development and its implementation. In the last part of this article, major health problems, as well as recommendations for remedial actions are outlined. 相似文献
94.
Bialer Meir Hadad Salim Kadry Bashier Abdul-Hai Ali Haj-Yehia Abdulla Sterling Jeff Herzig Yaacov Yagen Boris 《Pharmaceutical research》1996,13(2):284-289
Purpose. The described structure pharmacokinetic pharmacodynamic relationships (SPPR) study explored the utilization of tetramethylcyclopropane analogues of valpromide (VPD), or tetra-methylcyclopropane carboxamide derivatives of valproic acid (VPA) as new antiepileptics.
Methods. The study was carried out by investigating the pharmacokinetics in dogs and pharmacodynamics (anticonvulsant activity and neurotoxicity) of the following three cyclopropane analogues of VPD: 2,2,3,3-tetramethylcyclopropane carboxamide (TMCD), N-methyl TMCD (M-TMCD) and N-[(2,2,3,3-tetramethylcyclopropyl)carbonyl]-glycinamide (TMC-GLD).
Results. The three investigated compounds showed a good anticonvulsant profile in mice and rats due to the fact that they were metabolically stable VPD analogues which were not biotransformed to their non-active acid, 2,2,3,3-tetramethylcyclopropane carboxylic acid (TMCA). M-TMCD was metabolized to TMCD and TMC-GLD underwent partial biotransformation to its glycine analogue N-[(2,2,3,3-tetramethylcyclopropyl)carbonyl]-glycine (TMC-GLN). Unlike TMC-GLN, the above mentioned amides had low clearance and a relatively long half life.
Conclusions. In contrast to VPD which is biotransformed to VPA, the aforementioned cyclopropane derivatives were found to be stable to amide-acid biotransformation. TMCD and M-TMCD show that cyclic analogues of VPD, like its aliphatic isomers, must have either two substitutions at the position to the carbonyl, such as in the case of TMCD, or a substitution in the and in the positions like in the VPD isomer, valnoctamide (VCD). This paper discusses the antiepileptic potential of tetramethylcyclopropane analogues of VPD which are in animal models more potent than VPA and may be non-teratogenic and non-hepatotoxic. 相似文献
95.
96.
97.
Eed MD 《Aesthetic plastic surgery》2000,24(3):206-211
A series of 40 patients operated from 1995 through 1997 is reviewed. The women ranged in age from 18 to 40 and were seen
in either a university- or a private-hospital setting. Thirty-eight of the patients underwent reduction mammaplasty, which
was performed using an inferior pedicle technique with a straight-line incision; two patients underwent mastopexy only. The
reduction procedure depends on the formation of a cap from medial, lateral, and superior flaps. Following resection of breast
tissue the cap is joined to a cone—the nipple–areola complex carried on a subcutaneous inferior pedicle. The cone is fixed
to the chest wall with simple vertical stitches, minimizing the recurrence of ptosis. This technique is safe and versatile,
avoids a submammary scar, and offers an aesthetic and long-lasting result. 相似文献
98.
99.
100.
S. Ali Khan S. Jayachandran P. G. Desai P. Bonheim 《International urology and nephrology》2000,32(1):1-2