全文获取类型
收费全文 | 33151篇 |
免费 | 1748篇 |
国内免费 | 147篇 |
专业分类
耳鼻咽喉 | 350篇 |
儿科学 | 734篇 |
妇产科学 | 583篇 |
基础医学 | 6280篇 |
口腔科学 | 748篇 |
临床医学 | 2619篇 |
内科学 | 6275篇 |
皮肤病学 | 856篇 |
神经病学 | 3407篇 |
特种医学 | 1435篇 |
外科学 | 4582篇 |
综合类 | 151篇 |
一般理论 | 14篇 |
预防医学 | 1665篇 |
眼科学 | 722篇 |
药学 | 2326篇 |
中国医学 | 21篇 |
肿瘤学 | 2278篇 |
出版年
2022年 | 162篇 |
2021年 | 346篇 |
2020年 | 294篇 |
2019年 | 489篇 |
2018年 | 570篇 |
2017年 | 437篇 |
2016年 | 566篇 |
2015年 | 652篇 |
2014年 | 783篇 |
2013年 | 1175篇 |
2012年 | 1627篇 |
2011年 | 1749篇 |
2010年 | 1180篇 |
2009年 | 1129篇 |
2008年 | 1886篇 |
2007年 | 1925篇 |
2006年 | 1794篇 |
2005年 | 1920篇 |
2004年 | 1797篇 |
2003年 | 1766篇 |
2002年 | 1846篇 |
2001年 | 349篇 |
2000年 | 269篇 |
1999年 | 387篇 |
1998年 | 502篇 |
1997年 | 412篇 |
1996年 | 367篇 |
1995年 | 338篇 |
1994年 | 289篇 |
1993年 | 258篇 |
1992年 | 210篇 |
1991年 | 204篇 |
1990年 | 171篇 |
1989年 | 164篇 |
1988年 | 172篇 |
1985年 | 157篇 |
1984年 | 181篇 |
1983年 | 161篇 |
1982年 | 198篇 |
1981年 | 170篇 |
1978年 | 135篇 |
1933年 | 170篇 |
1932年 | 180篇 |
1931年 | 167篇 |
1930年 | 169篇 |
1929年 | 147篇 |
1928年 | 163篇 |
1927年 | 144篇 |
1926年 | 158篇 |
1925年 | 139篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Hans P. Zenner 《European archives of oto-rhino-laryngology》1981,230(1):81-92
Summary Monospecific antibodies to actin and to tubulin were used as immunofluorescent probes to evaluate the distribution of microtubules and actin filaments in the organ of Corti in mouse and guinea pig. The results indicate that in cochlear receptor cells actin and actin filaments as well as tubulin and microtubules are integral cytoskeletal elements. The presence of actin suggests a possible contractile mechanism within the sensory cilia whereas tubulin is thought to play an important role in the stability of sensory cells. Both proteins are discussed to form structural elements required for the mechano-chemical coupling in hearing.
Abbreviations ATP adenosin-tri-phosphate - SDS sodium-dodecyl-sulphate - PBS phosphate-buffered saline Dedicated to Professor Dr. A. Herrmann on the occasion of his 80th birthday 相似文献
Abbreviations ATP adenosin-tri-phosphate - SDS sodium-dodecyl-sulphate - PBS phosphate-buffered saline Dedicated to Professor Dr. A. Herrmann on the occasion of his 80th birthday 相似文献
3.
4.
Marieke Peeters Ludo Verhoeven Jan de Moor Hans van Balkom 《Research in developmental disabilities》2009,30(4):712-726
The goal of this longitudinal study was to investigate the precursors of early reading development in 52 children with cerebral palsy at kindergarten level in comparison to 65 children without disabilities. Word Decoding was measured to investigate early reading skills, while Phonological Awareness, Phonological Short-term Memory (STM), Speech Perception, Speech Production and Nonverbal Reasoning were considered reading precursors. Children with cerebral palsy lag behind on all reading precursors at the beginning of the second year of kindergarten. For the children without disabilities, early reading skills in Grade 1 were best predicted by Phonological Awareness and Phonological STM while Speech Production was the most important predictor of early reading success for the children with cerebral palsy, followed by Phonological Awareness and Speech Perception. Furthermore, for children with cerebral palsy, Speech Production appears to dominate reading development, as Speech Production measured at the beginning of the second year of kindergarten was strongly predictive of all other reading precursors measured at the end of the second year of kindergarten. The results of this study reveal that children with cerebral palsy with additional speech impairments are at risk for limited literacy development. Clinical implications are discussed. 相似文献
5.
6.
7.
Niclas Petri Ebba Bergman Patrik Forsell Mikael Hedeland Ulf Bondesson Lars Knutson Hans Lennern?s 《Drug metabolism and disposition》2006,34(7):1182-1189
The aim of this study in pigs was to investigate the local pharmacokinetics of fexofenadine in the intestine and liver by using the pig as a model for drug transport in the entero-hepatobiliary system. A parallel group design included seven pigs (10-12 weeks, 22.2-29.5 kg) in three groups (G1, G2, G3), and a jejunal single-pass perfusion combined with sampling from the bile duct and the portal, hepatic, and superior caval veins was performed. Fexofenadine was perfused through the jejunal segment alone (G1: 120 mg/l, total dose 24 mg) or with two different verapamil doses (G2: 175 mg/l, total dose 35 mg; and G3: 1000 mg/l, total dose 200 mg). The animals were fully anesthetized and monitored throughout the experiment. Fexofenadine had a low liver extraction (E(H); mean +/- S.E.M.), and the given doses of verapamil did not affect the E(H) (0.13 +/- 0.04, 0.16 +/- 0.03, and 0.12 +/- 0.02 for G1, G2, and G3, respectively) or biliary clearance. The E(H) for verapamil and antipyrine agreed well with human in vivo data. Verapamil did not increase the intestinal absorption of fexofenadine, even though the jejunal permeability of fexofenadine, verapamil, and antipyrine showed a tendency to increase in G2. This combined perfusion and hepatobiliary sampling method showed that verapamil did not affect the transport of fexofenadine in the intestine or liver. In this model the E(H) values for both verapamil and antipyrine were similar to the corresponding values in vivo in humans. 相似文献
8.
The reconstruction of a part of the body that has lost or inhibited function has been the most important aspect of reconstructive surgery in the past. Because of the existence of better techniques and the patient's wish for social reintegration, the plastic surgeon today is forced to consider the aesthetic results of his work more than in the past. Sometimes microsurgical procedures in reconstructive surgery are the only chance for the patient to be healed or palliated. Experience with more than 350 free tissue transfers gave us the opportunity to estimate the value of a donor flap with respect to the requirements of the receiving site. To satisfy the high aesthetic demands in these cases, it was necessary for the right place and shape the flap to fit as closely as possible, even if further corrections were necessary to achieve a satisfactory result. The transfer of latissimus dorsi and radial forearm flaps to the face and lower leg is discussed in cases of tumorus diseases and severe injuries of young and old patients.Presented to the IXth Congress of the International Society of Aesthetic Plastic Surgery, New York, October 13, 1987 相似文献
9.
Background
The fibromyalgia syndrome (FMS) is suggested to be a manifestation of depression or affective spectrum disorder. We measured the cognitive style of patients with FMS to assess personality styles in 44 patients with fibromyalgia syndrome (FMS) by comparing them with 43 patients with major depressive disorder (MDD) and 41 healthy controls (HC). 相似文献10.