全文获取类型
收费全文 | 1158篇 |
免费 | 100篇 |
国内免费 | 35篇 |
专业分类
儿科学 | 19篇 |
妇产科学 | 9篇 |
基础医学 | 185篇 |
口腔科学 | 21篇 |
临床医学 | 120篇 |
内科学 | 162篇 |
皮肤病学 | 8篇 |
神经病学 | 116篇 |
特种医学 | 103篇 |
外科学 | 69篇 |
综合类 | 39篇 |
一般理论 | 1篇 |
预防医学 | 111篇 |
眼科学 | 14篇 |
药学 | 94篇 |
肿瘤学 | 222篇 |
出版年
2021年 | 12篇 |
2019年 | 10篇 |
2018年 | 10篇 |
2017年 | 12篇 |
2016年 | 12篇 |
2015年 | 9篇 |
2014年 | 15篇 |
2013年 | 24篇 |
2012年 | 43篇 |
2011年 | 42篇 |
2010年 | 27篇 |
2009年 | 30篇 |
2008年 | 55篇 |
2007年 | 56篇 |
2006年 | 57篇 |
2005年 | 68篇 |
2004年 | 30篇 |
2003年 | 39篇 |
2002年 | 37篇 |
2001年 | 50篇 |
2000年 | 44篇 |
1999年 | 41篇 |
1998年 | 31篇 |
1997年 | 28篇 |
1996年 | 37篇 |
1995年 | 20篇 |
1994年 | 17篇 |
1993年 | 28篇 |
1992年 | 16篇 |
1991年 | 18篇 |
1990年 | 15篇 |
1989年 | 30篇 |
1988年 | 35篇 |
1987年 | 22篇 |
1986年 | 25篇 |
1985年 | 17篇 |
1984年 | 24篇 |
1983年 | 17篇 |
1982年 | 13篇 |
1981年 | 13篇 |
1980年 | 10篇 |
1979年 | 14篇 |
1978年 | 10篇 |
1977年 | 8篇 |
1976年 | 9篇 |
1975年 | 10篇 |
1973年 | 13篇 |
1972年 | 9篇 |
1971年 | 8篇 |
1970年 | 10篇 |
排序方式: 共有1293条查询结果,搜索用时 15 毫秒
1.
2.
E R Easton R S Coker R Ballinger 《Journal of the American Mosquito Control Association》1986,2(2):190-195
A mosquito surveillance program designed to prevent future human cases of Western equine encephalitis or Saint Louis encephalitis was established in 1983 on Indian reservations under the jurisdiction of the Aberdeen Area Indian Health Service in Iowa, Nebraska and South Dakota. Standard New Jersey light traps were operated on all reservations throughout the summer season while CDC miniature and encephalitis virus surveillance traps were employed for shorter periods of time on 4 reservations. Aedes vexans was the most abundant species except on the Pine Ridge, Rosebud, Winnebago and Yankton Sioux reservations in which Culex tarsalis predominated and for the Sac-n-Fox where Aedes trivittatus occurred with the greatest frequency. 相似文献
3.
4.
In five seated, normal subjects, we measured closing volumes using 133Xe boluses inhaled at residual volume. High frequency oscillatory ventilation (HFOV) (15 Hz, 2 cc/kg) was applied during either inspiration to total lung capacity or the subsequent expiration. Closing volume was increased (P less than 0.001) when HFOV was applied during the latter half of expiration, but not when HFOV was applied during inspiration or the first half of expiration. Subsequently, in seven subjects, we measured the regional distributions of 133Xe boluses delivered during open-glottis breath-hold at 14% vital capacity after equilibration with N2O. HFOV was applied during bolus delivery for about 16 sec. These distributions were compared with those achieved by intravenous injections of 133Xe in saline. Regional perfusion (injected isotope) exceeded regional N2O uptake at the lung bases and this was significantly accentuated by HFOV, compatible with increased basal closure. We conclude that in normal subjects at low lung volumes, HFOV may enhance airway closure, though other explanations are possible. 相似文献
5.
The differentiation of anxiety and depression by rating scales 总被引:1,自引:0,他引:1
6.
The authors examined reports addressing the question of whether electroconvulsive therapy (ECT) is more effective in psychotic or nonpsychotic depressive disorders. Most ECT studies did not consider the issue directly, and those that did had varying methodologies and results. The authors then analyzed the data of 33 depressed patients to clarify the differential response to ECT in 13 psychotic and 20 nonpsychotic patients. The subjects were also examined as to type of electrode placement. ECT produced a greater reduction in Hamilton Depression Rating Scale scores in the psychotic depressives as compared to the nonpsychotics after an average of 9.2 treatments. The two patients who were nonresponders to ECT were both nonpsychotic. 相似文献
7.
R. Michael Sly John A. Anderson C. Warren Bierman Paul Chervinsky Frederick C. Cogen James G. Easton Israel Glazer James P. Kemp Allan Knight Richard A. Krumholz Richard A. Nicklas Burton M. Rudolph Diane E. Schuller Allen T. Segal R. Michael Sly Stanley J. Szefler Michael J. Welch Ned J. Whitcomb Minoru Yamate 《The Journal of allergy and clinical immunology》1985,75(4):443-449
8.
9.
Suggestive evidence for a site specific prostate cancer gene on chromosome 1p36. The CRC/BPG UK Familial Prostate Cancer Study Coordinators and Collaborators. The EU Biomed Collaborators 总被引:2,自引:0,他引:2
下载免费PDF全文
![点击此处可从《Journal of medical genetics》网站下载免费的PDF全文](/ch/ext_images/free.gif)
10.
C Mobley S P Himburg D Robey P S Easton 《Journal of the American Dietetic Association》1984,84(9):1013-1017
Four decision-making styles (technician, planner, teacher, artist) were distinguished with Myers-Briggs Type Indicator (MBTI) results for 61 dietitians and 55 dietetic students. The "technician" style (impersonal, matter-of-fact analysis expressed in technical skills) was preferred to other styles by the greatest percentage of subjects studied. Subgroups of clinical dietitians, those 40 years old or older, and dietetic internship graduates preferred the "technical" style that is related to academic achievement in applied and physical sciences. Dietitians in administration, consulting, education, and public health indicated a preference for the "artistic" style (an insightful approach to possibilities expressed in an ability to communicate well with others). CUP graduates indicated the most diversity in style preferences. The "planner" style identified with researchers was preferred to the "artistic" style by students. Available data from groups of dietitians studied by other investigators supported these findings and indicated similarities among dietitians, school administrators, and medical technicians. Comparison between students in this and other samples indicated more differences than similarities, which may be due to differences in programs. Since all styles are useful within the profession, it is suggested that the identification and adaptation of style be included in education programs for dietetic students and practitioners. 相似文献