全文获取类型
收费全文 | 1671篇 |
免费 | 116篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 14篇 |
儿科学 | 55篇 |
妇产科学 | 29篇 |
基础医学 | 317篇 |
口腔科学 | 36篇 |
临床医学 | 149篇 |
内科学 | 252篇 |
皮肤病学 | 34篇 |
神经病学 | 55篇 |
特种医学 | 165篇 |
外国民族医学 | 1篇 |
外科学 | 218篇 |
综合类 | 55篇 |
预防医学 | 135篇 |
眼科学 | 7篇 |
药学 | 130篇 |
中国医学 | 8篇 |
肿瘤学 | 133篇 |
出版年
2023年 | 8篇 |
2022年 | 5篇 |
2021年 | 22篇 |
2020年 | 20篇 |
2019年 | 33篇 |
2018年 | 42篇 |
2017年 | 34篇 |
2016年 | 38篇 |
2015年 | 34篇 |
2014年 | 49篇 |
2013年 | 82篇 |
2012年 | 86篇 |
2011年 | 67篇 |
2010年 | 87篇 |
2009年 | 64篇 |
2008年 | 74篇 |
2007年 | 77篇 |
2006年 | 61篇 |
2005年 | 74篇 |
2004年 | 57篇 |
2003年 | 50篇 |
2002年 | 54篇 |
2001年 | 38篇 |
2000年 | 36篇 |
1999年 | 30篇 |
1998年 | 46篇 |
1997年 | 39篇 |
1996年 | 39篇 |
1995年 | 39篇 |
1994年 | 26篇 |
1993年 | 24篇 |
1992年 | 25篇 |
1991年 | 18篇 |
1990年 | 21篇 |
1989年 | 27篇 |
1988年 | 31篇 |
1987年 | 31篇 |
1986年 | 32篇 |
1985年 | 23篇 |
1984年 | 23篇 |
1983年 | 18篇 |
1982年 | 17篇 |
1981年 | 17篇 |
1980年 | 18篇 |
1979年 | 8篇 |
1978年 | 9篇 |
1977年 | 4篇 |
1976年 | 9篇 |
1975年 | 7篇 |
1968年 | 5篇 |
排序方式: 共有1793条查询结果,搜索用时 31 毫秒
1.
Distinct genetic alterations and luminal molecular subtype in nested variant of urothelial carcinoma
2.
3.
Various types of phenothiazines were examined for antibacterial effect on 61 Gram-positive and Gram-negative bacterial strains in vitro. The investigated phenothiazines were two neuroleptic drugs, fluphenazine and chlorpromazine, and two antihistaminic drugs, alimemazine and promethazine. All four drugs have antibacterial effects in vitro, the phenothiazines being more potent against the Gram-positive microorganisms. The antibacterial potency of the drugs was measured as IC50: Fluphenazine 29 microM (15 micrograms/ml), alimemzaine 49 microM (37 micrograms/ml), promethazine 88 microM (28 micrograms/ml) and chlorpromazine 92 microM (29 micrograms/ml). The antibacterial potency of the drugs was linked neither to the neuroleptic nor the antihistaminic potency of the drugs, which is in agreement with results of earlier stereoisomeric investigations. Thus, the known phenothiazines may represent a pool of potentially new antimicrobial drugs. A therapeutic application of these results, however, requires additional in vitro an in vivo testing in an animal model. The bacterial model might be of value as a model system in the study of the interaction of neuropharmacological agents and other membrane active compounds on biological membranes. 相似文献
4.
E MOLKE JENSEN K. A. THIESSEN AA. CHRISTENSEN 《Acta anaesthesiologica Scandinavica》1986,30(2):109-110
The effect of 4 mg oral naloxone on preoperative gastric volume and pH of gastric aspirate was studied in a double-blind, randomized study. Twenty patients received 10 ml of naloxone (4 mg) mixed with 10 ml of orange juice, and 20 patients received 10 ml of isotonic saline mixed with 10 ml of orange juice, 2 h before surgery. Gastric content was obtained immediately after intubation of the trachea. No significant difference in gastric volume and pH of gastric aspirate was found between the two groups. It is concluded that naloxone does not affect gastric emptying and gastric acid secretion to a degree great enough to protect against aspiration of gastric contents into the lungs. 相似文献
5.
6.
7.
8.
9.
OBJECTIVE: We aimed to determine whether general practitioner GP hospitals,
compared with alternative modes of health care, are cost- saving. METHODS:
Based on a study of admissions (n = 415) to fifteen GP hospitals in the
Finnmark county of Norway during 8 weeks in 1992, a full 1-year patient
throughput in GP hospitals was estimated. The alternative modes of care
(general hospital, nursing home or home care) were based on assessments by
the GPs handling the individual patients. The funds transferred to finance
GP hospitals were taken as the cost of GP hospitals, while the cost of
alternative care was based on municipality and hospital accounts, and
standard charges for patient transport. RESULTS: The estimated total annual
operating cost of GP hospitals was 32.2 million NOK (10 NOK = 1 Pound)
while the cost of alternative care was in total 35.9 million NOK.
Sensitivity analyses, under a range of assumptions, indicate that GP care
in hospitals incurs the lowest costs to society. CONCLUSION: GP hospitals
are likely to provide health care at lower costs than alternative modes of
care.
相似文献
10.