全文获取类型
收费全文 | 11967篇 |
免费 | 622篇 |
国内免费 | 30篇 |
专业分类
耳鼻咽喉 | 136篇 |
儿科学 | 838篇 |
妇产科学 | 457篇 |
基础医学 | 1277篇 |
口腔科学 | 191篇 |
临床医学 | 864篇 |
内科学 | 2055篇 |
皮肤病学 | 221篇 |
神经病学 | 682篇 |
特种医学 | 280篇 |
外科学 | 2134篇 |
综合类 | 279篇 |
一般理论 | 3篇 |
预防医学 | 903篇 |
眼科学 | 593篇 |
药学 | 629篇 |
中国医学 | 27篇 |
肿瘤学 | 1050篇 |
出版年
2023年 | 99篇 |
2022年 | 209篇 |
2021年 | 373篇 |
2020年 | 196篇 |
2019年 | 275篇 |
2018年 | 373篇 |
2017年 | 267篇 |
2016年 | 344篇 |
2015年 | 295篇 |
2014年 | 419篇 |
2013年 | 553篇 |
2012年 | 776篇 |
2011年 | 845篇 |
2010年 | 480篇 |
2009年 | 384篇 |
2008年 | 656篇 |
2007年 | 736篇 |
2006年 | 662篇 |
2005年 | 600篇 |
2004年 | 520篇 |
2003年 | 506篇 |
2002年 | 452篇 |
2001年 | 250篇 |
2000年 | 235篇 |
1999年 | 205篇 |
1998年 | 114篇 |
1997年 | 77篇 |
1996年 | 56篇 |
1995年 | 48篇 |
1994年 | 40篇 |
1993年 | 46篇 |
1992年 | 102篇 |
1991年 | 102篇 |
1990年 | 73篇 |
1989年 | 73篇 |
1988年 | 71篇 |
1987年 | 77篇 |
1986年 | 82篇 |
1985年 | 108篇 |
1984年 | 55篇 |
1983年 | 58篇 |
1982年 | 42篇 |
1980年 | 37篇 |
1979年 | 82篇 |
1978年 | 45篇 |
1977年 | 47篇 |
1976年 | 40篇 |
1974年 | 42篇 |
1973年 | 49篇 |
1972年 | 46篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Sturge-Weber syndrome is a rare neurocutaneous disorder characterized by a facial nevus flammeus and extensive angiomatous changes involving the leptomeninges, the dura, and vessels of the gray and white matter. Oculodermal melanocytosis is characterized by hyperpigmentation of the facial skin in the distribution of the ophthalmic, maxillary, and occasionally mandibular division of the trigeminal nerve. 相似文献
42.
43.
Mehrotra S Singh VK Agarwal SS Maurya R Srimal RC 《Experimental and molecular pathology》2002,72(3):236-242
Extracts of plants have been widely evaluated for possible antiproliferative and anticarcinogenic properties. The antiproliferative activity of ethanolic extract of Boerhaavia diffusa, a plant used in traditional medicine, was evaluated in several cells. It inhibited T cell mitogen phytohemagglutinin and concanavalin A-stimulated proliferation of human peripheral blood mononuclear cells (PBMC). It also inhibited purified protein derivative antigen-stimulated PBMC proliferation and human mixed lymphocyte culture. In addition, B. diffusa extract inhibited the growth of several cell lines of mouse and human origin, such as mouse macrophage cells (RAW 264.7), human macrophage cells (U937), human monocytic cells (THP-1), mouse fibroblast cells (L929), human embryonic kidney cells (HEK293), mouse liver cells (BNLCL.2), African green monkey kidney cells (COS-1), mouse lymphoma cells (EL-4), human erythroleukemic cells (K562), and human T cells (Jurkat). The present study has demonstrated the antiproliferative potential of ethanolic extract of B. diffusa in vitro. 相似文献
44.
Kochar DK Agarwal RP Joshi A Kumawat BL 《The Journal of the Association of Physicians of India》1998,46(4):337-340
Pain associated with Herpes Zoster (HZ) and Post-herpetic Neuralgia (PHN) has been a challenging task to manage with ease. Topical aspirin dissolved in chloroform is an effective means of reducing pain due to HZ and PHN in most patients. The locus of pain origin and analgesia induced by topical aspirin is supposed to be at cutaneous free nerve ending pain receptors. The present study was conduced in fifty two patients of HZ and PHN. Pain intensity before and after the application of drug was measured with help of Sort Form McGill Pain Questionnaire (SE-MPQ). Most of the patients experienced relief of pain within 1-5 minutes after the aspirin-chloroform application. Maximum relief was achieved in about 30-40 minutes and persisted for 5-6 hrs. In the beginning 3-4 applications were required but frequency decreased gradually as the pain abated. 相似文献
45.
Samuels L Entwistle J Holmes E Eaton D Thomas MP Menzano G Promisloff R 《ASAIO journal (American Society for Artificial Internal Organs : 1992)》2004,50(3):234-236
The traditional extracorporeal membrane oxygenation circuit uses a centrifugal pump. These pumps require close monitoring and are subject to complications. In addition, they do not take advantage of the potential benefits of pulsatile flow. These extracorporeal membrane oxygenation circuits use a single pump with an inline oxygenator. If cardiac failure persists after respiratory recovery has occurred, removal of the oxygenator requires an additional procedure to convert the patient to biventricular support. This report describes a circuit in which an oxygenator is connected to a pulsatile ventricular assist device. Single and dual circuit configurations are illustrated. Recommendations for pulmonary care during support are also described. 相似文献
46.
47.
D. Gupta V. K. Singh J. Rajasingh T. Shinohara R. Misra S. S. Agarwal 《Immunologic research》1996,15(1):74-83
The objective of this study was to determine the proliferative responses of peripheral blood lymphocytes of ocular antigens like retinal S-antigen, peptides M and G of S-antigen, yeast histone H3 peptide 106–121 homologous to peptide M and peptide R16 of interphotoreceptor retinoid binding protein (IRBP) in children with juvenile chronic arthritis (JCA). We have studied the in vitro proliferative response of peripheral blood lymphocytes from 41 patients with JCA (10 with and 31 without uveitis) and 23 healthy controls against the above antigens. The responders were retested after 1 or 6 months. Fifty (5/10) and 9.7% (3/31) of JCA patients with and without uveitis, respectively, responded (stimulation index >3) to S-antigen or one of its peptide listed above or yeast histone H3 peptide or R16 of IRBP. None of the healthy controls responded to any of these antigens. The difference in the frequency of responders (SI>3) between JCA associated with uveitis and healthy controls was statistically significant (p=0.001). Similarly, the difference between JCA with and without uveitis was also significant (p=0.013). Our findings suggest that these antigens may have a role in the pathogenesis of uveitis in a subset of patients with JCA. 相似文献
48.
49.
Bajaj P Agarwal K Niveditha SR Pathania OP 《Indian journal of pathology & microbiology》2001,44(2):145-146
Benign and malignant soft tissue tumors of the paratesticular region i.e. those arising from the testicular tunics, epididymis and spermatic cord are uncommon. Of these, leiomyosarcoma arising from the tunica vaginalis is extremely rare. On extensive computerised search, a single case has been reported till date in the literature. We hereby report one such case because of its rarity. 相似文献
50.
The mechanical impedance of the ankle joint during electrical stimulation of the soleus is studied by applying constant-velocity
10° angular perturbations to the ankle and measuring the resultant torque. Both neurologically intact subjects and spinal
cord injured subjects are tested. Lumped, piecewise linear models are developed to predict the torque from the measured displacement
and acceleration signals. The commonly used second-order mass-spring-dashpot model fails to predict the changes in torque
that occur following imposed movements. A fiveelement, directionally-dependent piecewise linear model is much better at predicting
the measured responses for velocities up to 50° s−1. Numerical least squared error indentification techniques are used to estimate the model parameters for three neurologically
intact and three spinal cord injured subjects. The average error between the model’s response and the measured response across
all subjects is 10·9%. There is some evidence that a velocity-dependent non-linear model could produce better results than
the directionally-dependent piecewise linear model. 相似文献