全文获取类型
收费全文 | 3903篇 |
免费 | 365篇 |
国内免费 | 73篇 |
专业分类
耳鼻咽喉 | 49篇 |
儿科学 | 106篇 |
妇产科学 | 77篇 |
基础医学 | 596篇 |
口腔科学 | 91篇 |
临床医学 | 523篇 |
内科学 | 717篇 |
皮肤病学 | 78篇 |
神经病学 | 234篇 |
特种医学 | 339篇 |
外国民族医学 | 2篇 |
外科学 | 512篇 |
综合类 | 121篇 |
一般理论 | 5篇 |
预防医学 | 301篇 |
眼科学 | 113篇 |
药学 | 361篇 |
中国医学 | 1篇 |
肿瘤学 | 115篇 |
出版年
2021年 | 40篇 |
2019年 | 41篇 |
2018年 | 47篇 |
2017年 | 43篇 |
2016年 | 41篇 |
2015年 | 53篇 |
2014年 | 80篇 |
2013年 | 113篇 |
2012年 | 136篇 |
2011年 | 156篇 |
2010年 | 110篇 |
2009年 | 116篇 |
2008年 | 136篇 |
2007年 | 173篇 |
2006年 | 159篇 |
2005年 | 130篇 |
2004年 | 100篇 |
2003年 | 112篇 |
2002年 | 106篇 |
2001年 | 119篇 |
2000年 | 112篇 |
1999年 | 109篇 |
1998年 | 82篇 |
1997年 | 99篇 |
1996年 | 83篇 |
1995年 | 87篇 |
1994年 | 67篇 |
1993年 | 71篇 |
1992年 | 80篇 |
1991年 | 88篇 |
1990年 | 82篇 |
1989年 | 104篇 |
1988年 | 99篇 |
1987年 | 86篇 |
1986年 | 62篇 |
1985年 | 71篇 |
1984年 | 69篇 |
1983年 | 64篇 |
1982年 | 49篇 |
1981年 | 49篇 |
1980年 | 65篇 |
1979年 | 75篇 |
1978年 | 43篇 |
1977年 | 53篇 |
1976年 | 52篇 |
1975年 | 48篇 |
1973年 | 37篇 |
1972年 | 39篇 |
1971年 | 29篇 |
1970年 | 27篇 |
排序方式: 共有4341条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
F Leca D Marchiset-Leca A Noble M Antonetti 《European journal of drug metabolism and pharmacokinetics》1991,16(2):107-111
Twenty-two days after administration by intravenous bolus, of 50 mg of adriamycin to several patients we found concentrations of adriamycin and adriamycinol of the order of 100 pcg/ml. In theory, however, with a terminal half-life of 30 h, the plasma levels of adriamycin and adriamycinol should be close to 0.1 pcg/ml. Further pharmacokinetic investigation was therefore necessary. We have retained for this study nine male patients, aged between 53 and 69 years who received 25 to 50 mg of adriamycin by slow intravenous injection. The HPLC method permitted the detection of 50 pcg/ml of adriamycin and adriamycinol, with the possibility of monitoring their elimination during 120 h (and in one case during 160 h). The terminal half-lives of elimination estimated in 8 patients were respectively 110 +/- 52 h for adriamycin and 92 h 50 min +/- 43 h for adriamycinol. Surface ratios under adriamycinol curves against calculated adriamycin was 1.10 +/- 0.26. Plasma levels found during the To in certain patients correspond to the end of the drug elimination of the previous treatment. It is difficult with a half-life to 110 h to predict the effects of residual concentrations of adriamycin and adriamycinol. 相似文献
6.
7.
The effect of continuous epidural analgesia on postoperative pain, rehabilitation, and duration of hospitalization in total knee arthroplasty 总被引:4,自引:0,他引:4
O M Mahoney P C Noble J Davidson H S Tullos 《Clinical orthopaedics and related research》1990,(260):30-37
Efficacies of three alternate methods of postoperative analgesia were studied in 156 patients who had total knee arthroplasty (TKA). Forty-two of these patients received parenteral meperidine hydrochloride or morphine (Group 1), 58 patients received periodic epidural injections of morphine (Group 2), and 56 patients received continuous epidural infusions of bupivacaine hydrochloride and Duramorph (Group 3). The postoperative course of all patients was documented in terms of the incidence and severity of pain, range of joint motion, duration of hospitalization, and occurrence of complications. Although epidural analgesia increased the cost and duration of the operation, good-to-excellent pain relief was attained in 86% (Group 2) and 88% (Group 3) of cases with epidural analgesia compared with 61% of patients (Group 1) receiving conventional analgesia. Moreover, 67% of patients in Group 1 experienced frequent episodes of moderate-to-severe postoperative pain in contrast to 40% of patients in Group 2 and only 10% of patients in Group 3. As a result of diminished pain, greater joint motion was obtained within the first 72 hours in Groups 2 and 3. They also had shorter hospitalization (9.6 days versus 11.2 days for Group 1 and 10.8 days for Group 2). However, the use of epidural analgesia did not reduce the incidence of complications, including nausea. Continuous infusion of epidural bupivacaine and Duramorph provided good-to-excellent control of postoperative pain after TKA. However, better analgesics are needed to reduce the high incidence of side effects associated with various treatment methods. 相似文献
8.
Progressive peripheral cone dysfunction 总被引:1,自引:0,他引:1
A 22-year-old man had a three-year history of progressive day blindness, most notably peripherally, and denied difficulty with central vision or color vision. Visual function studies demonstrated a diffuse dysfunction of the photopic system and normal scotopic function. The central cone function, however, was essentially normal. Visual acuity was 20/20 in each eye, results on AO-HRR and Ishihara color plate testing were normal, color naming visual fields demonstrated color discrimination in the central 10 degrees, and foveal adaptation was normal. 相似文献
9.
A study of the value of electrophoretic and other techniques for typing Acinetobacter calcoaceticus 总被引:1,自引:0,他引:1
Forty-four isolates of Acinetobacter calcoaceticus var anitratus collected during hospital outbreaks were studied using polyacrylamide gel electrophoresis (PAGE), plasmid analysis, antibiograms and biochemical tests to determine their degree of similarity. Reproducibility tests were also carried out on the PAGE and biochemical techniques to determine their validity when used to compare bacteria of the same type isolated intermittently. PAGE data was analysed densitometrically and isolates compared using a similarity matrix. All methods were able to subdivide the isolates, but results did not always correlate well between methods. Reproducibility data indicated that careful attention to technique is required when organisms are examined by PAGE sequentially. Results suggest that no single biotyping technique is likely to be adequate and that electrophoretic, biochemical and antibiogram data may complement one another and other epidemiological data in the typing of these organisms. 相似文献
10.
Investigation of 39 JK-type coryneform isolates from patients at a single hospital revealed that 23 possessed plasmids, which formed six groups on restriction endonuclease analysis. Four of the groups were associated with production of similar bacteriocin-like substances, and shared a minimum of 6.4 kilobase pairs of DNA. These plasmids, found in isolates from different patients, provide strong direct evidence that person-to-person transmission of JK bacteria had occurred within the hospital. 相似文献