全文获取类型
收费全文 | 867篇 |
免费 | 65篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 18篇 |
儿科学 | 31篇 |
妇产科学 | 22篇 |
基础医学 | 99篇 |
口腔科学 | 16篇 |
临床医学 | 118篇 |
内科学 | 137篇 |
皮肤病学 | 9篇 |
神经病学 | 28篇 |
特种医学 | 81篇 |
外科学 | 76篇 |
综合类 | 61篇 |
一般理论 | 2篇 |
预防医学 | 66篇 |
眼科学 | 7篇 |
药学 | 120篇 |
中国医学 | 1篇 |
肿瘤学 | 47篇 |
出版年
2021年 | 6篇 |
2019年 | 7篇 |
2018年 | 7篇 |
2015年 | 8篇 |
2014年 | 13篇 |
2013年 | 16篇 |
2012年 | 27篇 |
2011年 | 34篇 |
2010年 | 20篇 |
2009年 | 15篇 |
2008年 | 32篇 |
2007年 | 43篇 |
2006年 | 25篇 |
2005年 | 26篇 |
2004年 | 21篇 |
2003年 | 20篇 |
2002年 | 12篇 |
2001年 | 11篇 |
2000年 | 13篇 |
1999年 | 21篇 |
1998年 | 38篇 |
1997年 | 25篇 |
1996年 | 26篇 |
1995年 | 13篇 |
1994年 | 27篇 |
1993年 | 19篇 |
1992年 | 29篇 |
1991年 | 23篇 |
1990年 | 38篇 |
1989年 | 25篇 |
1988年 | 44篇 |
1987年 | 14篇 |
1986年 | 19篇 |
1985年 | 23篇 |
1984年 | 17篇 |
1983年 | 15篇 |
1982年 | 17篇 |
1981年 | 11篇 |
1980年 | 12篇 |
1979年 | 11篇 |
1978年 | 7篇 |
1976年 | 6篇 |
1975年 | 7篇 |
1974年 | 8篇 |
1973年 | 6篇 |
1972年 | 9篇 |
1969年 | 12篇 |
1968年 | 7篇 |
1967年 | 7篇 |
1966年 | 16篇 |
排序方式: 共有939条查询结果,搜索用时 93 毫秒
1.
Marilyn Sawyer Sommers 《Journal of nursing scholarship》2006,38(4):314-320
PURPOSE: To discuss injury research as a phenomenon of concern in nursing science. ORGANIZING CONSTRUCT: Injury is defined as the physical damage that results when the human body is briefly subjected to intolerable levels of energy. It is the leading cause of death in the first 4 decades of life in high-income nations and is second only to infectious diseases as a leading cause of death in low- and middle-income nations. METHODS: Review and discussion of relevant scientific and theoretical literature in both injury and nursing science. FINDINGS: Nurse scientists can apply unique perspectives to increase understanding of injury and its consequences. Fertile areas for nursing inquiry include identifying people at risk, developing models to explain the association between risk-taking and injury, testing interventions to prevent and limit injury, and creating and refining interventions that are culturally relevant to subpopulations most at risk for injury. CONCLUSIONS: The mandate to improve global heath should lead to nursing inquiry about this phenomenon, including developing and testing interventions to prevent and reduce injury. 相似文献
2.
3.
4.
THE INFLUENCE OF CAPTOPRIL AND NALOXONE ON THE VALSALVA MANOEUVRE AND SYSTOLIC TIME INTERVALS IN HEALTHY VOLUNTEERS 总被引:1,自引:0,他引:1
J. P. Richter De K. Sommers J. R. Snyman 《Clinical and experimental pharmacology & physiology》1994,21(4):301-305
1. The aim of the study was to ascertain whether the inhibition of the sympathetic nervous system by angiotensin-converting enzyme (ACE) inhibitors is mediated by endogenous opioids. Naloxone was used to evaluate the effects of the latter on systolic time intervals (STI) and Valsalva manoeuvre-induced blood pressure and heart rate changes. 2. Baseline recordings were done in 12 healthy male volunteers and repeated 2h after oral administration of 75 mg of captopril and again after naloxone 0.4 mg/kg was administered intravenously over 10 min. 3. After captopril there was a significant reduction in systolic (P<0.02) and mean blood pressure (P<0.04) without any changes in heart rate. Furthermore, captopril increased the Valsalva ratio (P<0.06) but did not influence inotropism as indicated by STI. Naloxone did not influence any of these findings. 4. The changes in the Valsalva ratio after captopril were mediated by an increase in the maximum bradycardia in nine of the 12 subjects. 5. The results indicate that endogenous opioids do not play a role in the putative sympatholytic effect of ACE inhibition. 相似文献
5.
6.
George K Kouvidis Mark B Sommers Peter V Giannoudis Pavlos G Katonis Michael Bottlang 《Journal of orthopaedic surgery and research》2009,4(1):16-9
Background
Lag screw cut-out failure following fixation of unstable intertrochanteric fractures in osteoporotic bone remains an unsolved challenge. This study tested if resistance to cut-out failure can be improved by using a dual lag screw implant in place of a single lag screw implant. Migration behavior and cut-out resistance of a single and a dual lag screw implant were comparatively evaluated in surrogate specimens using an established laboratory model of hip screw cut-out failure. 相似文献7.
Clinical diagnostic criteria for TMD. New classification permits multiple diagnoses. 总被引:21,自引:0,他引:21
E L Truelove E E Sommers L LeResche S F Dworkin M Von Korff 《Journal of the American Dental Association (1939)》1992,123(4):47-54
One of the first to permit multiple diagnoses, this new TMD classification scheme offers guidelines for clinicians and those conducting clinical field studies. The scheme was applied to a TMD population, with control subjects. 相似文献
8.
M Tarkington C L Sommers E P Gelmann M C Tefft J H Lynch 《The Journal of urology》1992,147(2):511-513
Extracellular pH may affect the sensitivity of cancer cells to chemotherapy agents. In an attempt to maximize the conditions for chemotherapy treatment of transitional cell carcinoma we tested the effect of pH on sensitivity of MGH-U3 transitional cell carcinoma cell line to thiotepa, doxorubicin, and mitomycin c in vitro. The toxicity of each agent tested varied with pH. There was no variation in cell growth in response to pH alone. The cytotoxic activity of thiotepa was markedly enhanced when cells were treated with a diluent pH of 5.5. Significant differences were also observed after treatment with doxorubicin and mitomycin c with a diluent pH of 7.0. This in vitro assay may be useful for clinical application of pH modulation during intravesical chemotherapy. 相似文献
9.
10.
K. L. Brayman M. K. Guidinger C. M. Sommers R. S. Sung 《American journal of transplantation》2007,7(Z1):1359-1375
Kidney and pancreas transplantation in 2005 improved in quantity and outcome quality, despite the increasing average age of kidney graft recipients, with 56% aged 50 or older. Geography and ABO blood type contribute to the discrepancy in waiting time among the deceased donor (DD) candidates. Allocation policy changes are decreasing the median times to transplant for pediatric recipients. Overall, 6% more DD kidney transplants were performed in 2005 with slight increases in standard criteria donors (SCD) and expanded criteria donors (ECD). The largest increase (39%) was in donation after cardiac death (DCD) from non‐ECD donors. These DCD, non‐ECD kidneys had equivalent outcomes to SCD kidneys. 1‐, 3‐ and 5‐year unadjusted graft survival was 91%, 80% and 70% for non‐ECD‐DD transplants, 82%, 68% and 53% for ECD‐DD grafts, and 95%, 88% and 80% for living donor kidney transplants. In 2005, 27% of patients were discharged without steroids compared to 3% in 1999. Acute rejection decreased to 11% in 2004. There was a slight increase in the number of simultaneous pancreas‐kidney transplants (895), with fewer pancreas after kidney transplants (343 from 419 in 2004), and a stable number of pancreas alone transplants (129). Pancreas underutilization appears to be an ongoing issue. 相似文献