全文获取类型
收费全文 | 9069篇 |
免费 | 482篇 |
国内免费 | 45篇 |
专业分类
耳鼻咽喉 | 89篇 |
儿科学 | 139篇 |
妇产科学 | 83篇 |
基础医学 | 1198篇 |
口腔科学 | 292篇 |
临床医学 | 993篇 |
内科学 | 2041篇 |
皮肤病学 | 220篇 |
神经病学 | 945篇 |
特种医学 | 440篇 |
外科学 | 1301篇 |
综合类 | 38篇 |
预防医学 | 344篇 |
眼科学 | 186篇 |
药学 | 659篇 |
中国医学 | 45篇 |
肿瘤学 | 583篇 |
出版年
2023年 | 24篇 |
2022年 | 47篇 |
2021年 | 128篇 |
2020年 | 92篇 |
2019年 | 106篇 |
2018年 | 128篇 |
2017年 | 146篇 |
2016年 | 165篇 |
2015年 | 200篇 |
2014年 | 217篇 |
2013年 | 320篇 |
2012年 | 523篇 |
2011年 | 583篇 |
2010年 | 368篇 |
2009年 | 416篇 |
2008年 | 604篇 |
2007年 | 673篇 |
2006年 | 664篇 |
2005年 | 690篇 |
2004年 | 647篇 |
2003年 | 645篇 |
2002年 | 643篇 |
2001年 | 130篇 |
2000年 | 107篇 |
1999年 | 140篇 |
1998年 | 142篇 |
1997年 | 101篇 |
1996年 | 95篇 |
1995年 | 64篇 |
1994年 | 64篇 |
1993年 | 50篇 |
1992年 | 40篇 |
1991年 | 51篇 |
1990年 | 38篇 |
1989年 | 40篇 |
1988年 | 27篇 |
1987年 | 35篇 |
1986年 | 26篇 |
1985年 | 27篇 |
1984年 | 36篇 |
1983年 | 26篇 |
1982年 | 23篇 |
1981年 | 24篇 |
1980年 | 29篇 |
1979年 | 22篇 |
1978年 | 24篇 |
1977年 | 19篇 |
1976年 | 23篇 |
1974年 | 20篇 |
1973年 | 24篇 |
排序方式: 共有9596条查询结果,搜索用时 15 毫秒
1.
2.
Die Anaesthesiologie - Eine junge Patientin erleidet während der Anlage einer axillären Plexusblockade einen generalisierten Krampfanfall. Die Mechanismen, im Wesentlichen die vermutlich... 相似文献
3.
4.
Clinical Epileptology - Der plötzliche unerwartete Tod stellt eine seltene, aber schwerwiegende Komplikation für Epilepsiepatienten dar. Das Risiko hierfür ist u. a. nachts und... 相似文献
5.
Lei Li Jürgen Bruns Reinhard E. Friedrich Rainer Schmelzle 《European journal of plastic surgery》2006,29(2):93-96
Adamantinoma of long bones is one of the rarest of malignant bone tumors; it is commonly located in the middle or lower third of the diaphysis of the tibia. A case with multiple occurrences affecting both the tibia and fibula is presented. En bloc resection with wide operative margins was performed, and a large tibial defect of 23 cm was effectively bridged by a revascularized free fibular flap. At 13 months follow-up, there was no sign of local recurrence or metastasis, and the patient was mobile. 相似文献
6.
Jan M?schwitzer Rainer H Müller 《European journal of pharmaceutics and biopharmaceutics》2006,62(3):282-287
High pressure homogenization can be employed to produce drug nanocrystals with a number of advantages, like improved solubility behaviors, better drug targeting or even increased mucoadhesiveness. To obtain a controlled drug delivery system it is necessary to transform the resulting nanosuspension into a solid dosage form. The present study shows the feasibility to use a mucoadhesive nanosuspension of poorly soluble hydrocortisone acetate produced by high pressure homogenization as layering dispersion in a fluidized bed process, followed by the application of an enteric coating to achieve a controlled drug release. To point out the advantages of drug nanocrystals the new fomulation was compared with a formulation containing micronized drug. Both formulations were characterized with regard to their particle size and crystallinity by using laser diffractometry, photon correlation spectroscopy and X-ray diffraction. The pellet morphology was characterized by using the environmental scanning electron microscopy (ESEM). In the in vitro dissolution tests an accelerated dissolution velocity and an increased drug release could be shown for the pellets containing drug nanocrystals. 相似文献
7.
8.
9.
10.
Ernst R. Kuse Joerg Kotzerke Silke Müller Björn Nashan Rainer Lück Karsten Jaeger 《Transplant international》2002,15(6):272-277
It has been demonstrated that total parenteral nutrition (TPN) modulates the function of the hepatic reticuloendothelial system (RES). The objective of this study was to evaluate the impact of two different TPN lipid emulsions on the recovery of allograft RES function after orthotopic liver transplantation (OLTx). In a prospective, double-blind study, OLTx patients were randomly assigned to two treatment groups. Group I ( n=13) received a TPN regimen that included long-chain triglycerides (LCT). Group II ( n=9) received a TPN regimen that included a fat emulsion consisting of both medium-chain triglycerides (MCT) and LCT. At baseline, i.e., on days 2 or 3 after OLTx ( t1), before lipids for TPN were started, hepatic RES function was determined using the human serum albumin millimicrosphere technique (K-value, 1/min). A second measurement ( t2) was obtained after 7 days of TPN, including one of the study's two fat emulsions. The mean (+/- SD) K-value (1/min) was 0.48+/-0.16 in the LCT group and 0.55+/-0.28 in the MCT/LCT group at t1, and it improved to 0.62+/-0.21 in the LCT group and to 0.86+/-0.32 in the MCT/LCT group at t2. RES function recovery was significantly better in the MCT/LCT group ( P< or = 0.05). MCT/LCT emulsion appears to be the TPN fat emulsion of choice after OLTx as it seems to have less impact on hepatic RES recovery. 相似文献