全文获取类型
收费全文 | 3896篇 |
免费 | 244篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 37篇 |
儿科学 | 165篇 |
妇产科学 | 56篇 |
基础医学 | 463篇 |
口腔科学 | 282篇 |
临床医学 | 311篇 |
内科学 | 571篇 |
皮肤病学 | 81篇 |
神经病学 | 128篇 |
特种医学 | 158篇 |
外科学 | 678篇 |
综合类 | 123篇 |
一般理论 | 4篇 |
预防医学 | 196篇 |
眼科学 | 91篇 |
药学 | 452篇 |
1篇 | |
中国医学 | 52篇 |
肿瘤学 | 299篇 |
出版年
2023年 | 30篇 |
2022年 | 74篇 |
2021年 | 141篇 |
2020年 | 89篇 |
2019年 | 102篇 |
2018年 | 140篇 |
2017年 | 101篇 |
2016年 | 120篇 |
2015年 | 149篇 |
2014年 | 170篇 |
2013年 | 232篇 |
2012年 | 333篇 |
2011年 | 323篇 |
2010年 | 177篇 |
2009年 | 164篇 |
2008年 | 190篇 |
2007年 | 183篇 |
2006年 | 120篇 |
2005年 | 92篇 |
2004年 | 93篇 |
2003年 | 76篇 |
2002年 | 65篇 |
2001年 | 68篇 |
2000年 | 45篇 |
1999年 | 46篇 |
1998年 | 42篇 |
1997年 | 34篇 |
1996年 | 45篇 |
1995年 | 37篇 |
1994年 | 29篇 |
1993年 | 22篇 |
1992年 | 47篇 |
1991年 | 38篇 |
1990年 | 36篇 |
1989年 | 55篇 |
1988年 | 39篇 |
1987年 | 47篇 |
1986年 | 32篇 |
1985年 | 30篇 |
1984年 | 31篇 |
1983年 | 29篇 |
1982年 | 17篇 |
1981年 | 18篇 |
1980年 | 18篇 |
1979年 | 16篇 |
1977年 | 17篇 |
1976年 | 21篇 |
1975年 | 17篇 |
1974年 | 24篇 |
1973年 | 13篇 |
排序方式: 共有4148条查询结果,搜索用时 15 毫秒
61.
Maya Thomas Ajith Sivadasan Mathew Alexander Anil Kumar B. Patil 《Annals of Indian Academy of Neurology》2012,15(4):329-331
Subacute sclerosing panencephalitis (SSPE) is chronic encephalitis occurring after infection with measles virus. An 8-year-old boy presented with progressive behavioral changes, cognitive decline and myoclonic jerks, progressing to a bed bound state over 2 months. Magnetic resonance imaging (MRI) brain showed T2-weighted hyperintensities in the subcortical areas of the left occipital lobe and brachium of the inferior colliculus on both sides. EEG showed bilateral, synchronous periodic discharges. Serum/cerebrospinal fluid measles IgG titer was significantly positive. The overall features were suggestive of SSPE. MRI finding of bilateral inferior colliculus changes on MRI without significant involvement of other commonly involved areas suggests an uncommon/rare imaging pattern of SSPE. 相似文献
62.
63.
64.
65.
Autologous serum therapy is a promising therapy for treatment resistant urticaria. This is useful in developing countries as this is economical option. Minimum instruments like centrifuge, syringe and needles are required for the procedure. 相似文献
66.
67.
Parker E.Ludwig Finosh G.Thankam Arun A.Patil Andrea J.Chamczuk Devendra K.Agrawal 《中国神经再生研究》2018,(1)
Many therapies with potential for treatment of brain injury have been investigated. Few types of cells have spurred as much interest and excitement as stem cells over the past few decades. The multipotentiality and self-renewing characteristics of stem cells confer upon them the capability to regenerate lost tissue in ischemic or degenerative conditions as well as trauma. While stem cells have not yet proven to be clinically effective in many such conditions as was once hoped, they have demonstrated some effects that could be manipulated for clinical benefit. The various types of stem cells have similar characteristics, and largely differ in terms of origin; those that have differentiated to some extent may exhibit limited capability in differentiation potential. Stem cells can aid in decreasing lesion size and improving function following brain injury. 相似文献
68.
69.
70.
The electromagnetic field focusing (EFF) apparatus consists of a radio frequency generator, solenoidal coil, and a hand-held or catheter probe. Applications such as aneurysm treatment, angioplasty, and neurosurgery in various models have been reported. The probe is operated in the near field (within one wavelength of an electromagnetic field source) of a coil inducing eddy currents in biological tissues, producing maximal convergence of the induced current at the probe tip. The probe produces very high temperatures depending on the wattage selected for the given radio frequency of output power. The high temperature can be used in cutting, cauterizing, or vaporizing. The EFF probe is comparable to different types of lasers and to bipolar and monopolar cautery. The EFF probe can be used with catheters or endoscopes. Objectives of this study were to determine what the thermal properties of the EFF probe are and how instrument parameters can be varied to obtain different temperatures in the tissue near the probe tip. In this study an F2 catheter was used as an insulated sheath and the tip of the guide wire was used as the probe tip. Different powers, wave forms, coil-to-probe distances, and probe-tip lengths were tested on a phantom that simulates tissue electrical properties. Some of the experiments were conducted under normal saline to simulate treatment of tissue with body fluids such as blood vessels or brain tissue under normal physiologic conditions. It is concluded that the EFF probe has the advantages of easy manipulation, relative safety, cost effectiveness, and a high degree of spatial control.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献