全文获取类型
收费全文 | 553篇 |
免费 | 35篇 |
国内免费 | 105篇 |
专业分类
儿科学 | 29篇 |
妇产科学 | 7篇 |
基础医学 | 49篇 |
口腔科学 | 41篇 |
临床医学 | 122篇 |
内科学 | 161篇 |
皮肤病学 | 8篇 |
神经病学 | 8篇 |
特种医学 | 69篇 |
外国民族医学 | 1篇 |
外科学 | 35篇 |
综合类 | 50篇 |
预防医学 | 17篇 |
眼科学 | 6篇 |
药学 | 58篇 |
中国医学 | 1篇 |
肿瘤学 | 31篇 |
出版年
2021年 | 4篇 |
2018年 | 5篇 |
2017年 | 7篇 |
2016年 | 7篇 |
2015年 | 11篇 |
2014年 | 6篇 |
2013年 | 20篇 |
2012年 | 12篇 |
2011年 | 12篇 |
2010年 | 19篇 |
2009年 | 17篇 |
2008年 | 6篇 |
2007年 | 58篇 |
2006年 | 11篇 |
2005年 | 24篇 |
2004年 | 12篇 |
2003年 | 9篇 |
2002年 | 12篇 |
2001年 | 5篇 |
2000年 | 12篇 |
1999年 | 7篇 |
1998年 | 46篇 |
1997年 | 39篇 |
1996年 | 40篇 |
1995年 | 18篇 |
1994年 | 24篇 |
1993年 | 16篇 |
1992年 | 14篇 |
1991年 | 5篇 |
1990年 | 13篇 |
1989年 | 13篇 |
1988年 | 14篇 |
1987年 | 14篇 |
1986年 | 13篇 |
1985年 | 5篇 |
1984年 | 5篇 |
1981年 | 4篇 |
1980年 | 5篇 |
1977年 | 5篇 |
1976年 | 6篇 |
1965年 | 3篇 |
1963年 | 5篇 |
1959年 | 5篇 |
1958年 | 7篇 |
1957年 | 11篇 |
1956年 | 18篇 |
1955年 | 11篇 |
1954年 | 13篇 |
1949年 | 9篇 |
1948年 | 6篇 |
排序方式: 共有693条查询结果,搜索用时 0 毫秒
1.
2.
CM Reid M. Nelson P. Beckinsale P. Ryan LMH Wing LJ Beilin MA Brown GLR Jennings CI Johnston J. Marley JJ McNeil TO Morgan J. Shaw ID Steven MJ West 《Clinical and experimental pharmacology & physiology》1997,24(5):370-373
1. The present study aimed to determine the feasibility of conducting a 5 year cardiovascular outcome trial of the treatment of 6000 elderly hypertensive patients in Australian general practices. 2. General practitioners (GPs) were invited to participate by mail and personal follow-up. Patient records were reviewed to identify subjects for a blood pressure (BP) screening programme. Blood pressure was measured on three occasions and eligible subjects were included if the average BP was 160 mmHg systolic or 90 mmHg diastolic if systolic BP was 140 mmHg. 3. Seven hundred and forty-one GPs were approached and 89 were enrolled in the study (12% of mail invites and 75% of those receiving a personal contact). In 16 practices where screening was completed, 82 000 records were reviewed to identify 4% patients eligible for screening. Twenty-two per cent of eligible subjects attended screening. Of 1938 subjects screened, 180 (9%) had BP 5=160/90 mmHg. Forty-seven percent of subjects (n = 916) were receiving antihypertensive therapy and 184 (20%) were withdrawn from therapy. One hundred and sixteen (63%) of these subjects had BP return to study entry levels within 6 weeks. Fifty-seven newly diagnosed and 81 previously treated subjects were randomized (7% of the screened population). 4. Based on the high participation rate of GPs, the response rate of patients to attend a BP screening programme and the 7% randomization to screening ratio for entry into the study, the ANBP2 pilot study has demonstrated that it is feasible to recruit subjects from Australian general practices to a cardiovascular outcome trial. 相似文献
3.
4.
5.
6.
溴莫尼定对视网膜缺血性损伤神经保护作用的实验研究 总被引:1,自引:1,他引:0
目的:探讨溴莫尼定(brimonidine)对视网膜缺血性损伤神经的保护作用。方法:新西兰大耳白兔32只,随机分为正常对照组、生理盐水治疗组、噻吗心安(timolol)治疗组、brimonidine治疗组,每组8只。后3组为损伤治疗组,通过生理盐水前房高压灌注的方法,制成视网膜缺血动物模型,在视网膜缺血前lh其结膜囊内分剐给予生理盐水、0.5%timolol眼液或0.2%brimonidine眼液局部治疗。在灌注后7d,观察图形视网膜电图(P-ERG)b波振幅变化,并进行组织形态学观察和视网膜神经节细胞(RGC)计数分析。结果:灌注后7d,3个损伤治疗组相对b波振幅恢复率为:7%、11%和64%,RGC标准丢失率为:43%、38%和12%,brimori-die治疗组视网膜组织形态结构接近正常对照组,而生理盐水治疗组和timolol治疗组视网膜内层组织结构损伤明显。结论:Brimonidine局部治疗对缺血诱导的视网膜结构和功能的损害有明显的神经保护作用。 相似文献
7.
MY Mancao LJ Sindel PH Richardson FM Silver 《Acta paediatrica (Oslo, Norway : 1992)》1996,85(1):118-120
Croup is an acute infectious illness usually occurring in children; it is characterized by brassy cough and stridor. The main pathogens include mainly parainfluenza and influenza viruses. Recently there have been reports of prolonged croup caused by the herpes simplex viruses. We report two cases of prolonged croup due to herpes simplex types 1 and 2. We also review and summarize the reported pediatric cases of herpetic croup. 相似文献
8.
C. P. MULLER T. SCHROEDER R. TU N. H C. BRONS G. JUNG F. SCHNEIDER K. H. WIESMÜLLER 《Scandinavian journal of immunology》1993,38(5):463-471
Infection or immunization with measles virus induces a protective immune reaction including neutralizing antibodies against the haemagglutinin and fusion protein. The reactivity of the polyclonal IgG response of sera obtained from late convalescent donors was studied, using overlapping 15mer peptides covering the complete sequence of the measles virus haemagglutinin. Most sera reacted with a similar set of peptides generating a characteristic binding pattern. The reactive peptides correspond to a region mediating cell hemolysis (aa310–325), to regions which serve as targets to neutralizing antibodies and to a putative transmembrane region (aa35–58). The latter region contains also a human T-cell epitope providing evidence of a non-random association of T- and B-cell epitopes. We also immunized different strains of mice and rabbits with measles virus. In contrast to the human sera, animal sera with strong neutralizing activities did not react with any of the H-protein peptides. The mostly weak reactivities with the linear sequences contrast with the strong neutralizing activities of the human or animal antibodies, suggesting that these primarily recognize the fusion protein or conformational epitopes of the haemagglutinin protein. 相似文献
9.
The ramification of the portal vein at the porta hepatis was studied by anatomic dissection performed in 32 formalin fixed human livers. In all the specimens there were branches which ran towards the caudate lobe, arising from the portal vein and either from the left or the right portal branches. Tri-and quadrifurcation of the portal vein was observed. In 5 cases (16%) there were branches arising from left portal branch or portal vein and directed anteriorly to the quadrate lobe or to the region of the gall-bladder sulcus. These branches ranged from 1.0 to 6.0 mm in diameter. The portal caudate branches were divided into 3 groups.Group 1: Branches to the papillary process; 1 or 2 branches in 26 cases (82%), 3 or 5 branches in 3 cases (9%) and no branches in 3 cases (9%); 相似文献
10.