全文获取类型
收费全文 | 20025篇 |
免费 | 1239篇 |
国内免费 | 37篇 |
专业分类
耳鼻咽喉 | 152篇 |
儿科学 | 702篇 |
妇产科学 | 709篇 |
基础医学 | 2708篇 |
口腔科学 | 264篇 |
临床医学 | 3334篇 |
内科学 | 3742篇 |
皮肤病学 | 204篇 |
神经病学 | 1995篇 |
特种医学 | 295篇 |
外科学 | 1439篇 |
综合类 | 249篇 |
一般理论 | 31篇 |
预防医学 | 2803篇 |
眼科学 | 154篇 |
药学 | 1165篇 |
中国医学 | 13篇 |
肿瘤学 | 1342篇 |
出版年
2023年 | 89篇 |
2022年 | 161篇 |
2021年 | 334篇 |
2020年 | 213篇 |
2019年 | 378篇 |
2018年 | 389篇 |
2017年 | 281篇 |
2016年 | 355篇 |
2015年 | 411篇 |
2014年 | 603篇 |
2013年 | 970篇 |
2012年 | 1397篇 |
2011年 | 1393篇 |
2010年 | 776篇 |
2009年 | 756篇 |
2008年 | 1361篇 |
2007年 | 1347篇 |
2006年 | 1343篇 |
2005年 | 1375篇 |
2004年 | 1312篇 |
2003年 | 1281篇 |
2002年 | 1244篇 |
2001年 | 165篇 |
2000年 | 138篇 |
1999年 | 177篇 |
1998年 | 251篇 |
1997年 | 220篇 |
1996年 | 182篇 |
1995年 | 192篇 |
1994年 | 169篇 |
1993年 | 164篇 |
1992年 | 138篇 |
1991年 | 118篇 |
1990年 | 111篇 |
1989年 | 113篇 |
1988年 | 108篇 |
1987年 | 110篇 |
1986年 | 80篇 |
1985年 | 84篇 |
1984年 | 118篇 |
1983年 | 89篇 |
1982年 | 125篇 |
1981年 | 104篇 |
1980年 | 106篇 |
1979年 | 58篇 |
1978年 | 65篇 |
1977年 | 43篇 |
1976年 | 49篇 |
1975年 | 30篇 |
1974年 | 39篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
Eileen Trafimow Ph.D. Marie Weissbourd Ph.D. Judith Wilen Ph.D. 《Journal of Child and Adolescent Group Therapy》1992,2(3):141-148
Traditionally, psychotherapy groups for children included only relatively intact youngsters. This paper describes a group consisting of four (near) psychotic children and two co-therapists which met for over three years. The developmental changes which occurred in the group over the course of time will be identified and discussed using a neo-psychoanalytic, object relations framework. 相似文献
63.
Ming Li Allison Martin Cheng Wen Steven W. Turner Lynley K. Lewis Judith A. Whitworth 《Clinical and experimental pharmacology & physiology》1995,22(12):919-923
1. We tested the ability of ouabain to cause chronic hyper tension by continuously infusing ouabain for 28 days (mini-osmotic pump implantation; i.p.). The blood pressure and metabolic effects of sham (150 mmol/L NaCI; n= 12) or ouabain infusion (10 μg/kg per day; n= 14; 100 μg/kg per day; n = 14) were examined in conscious Sprague-Dawley rats. 2. Plasma ouabain concentrations measured after 28 days of ouabain infusion were as follows: sham, not detectable (n= 11); ouabain 10 μg/kg per day, 0.60 ± 0.07 nmol/L (n= 14); and ouabain 100 μg/kg per day, 7.17 ± 0.57 nmol/L (n= 14; P < 0.001). 3. Sham or ouabain infusion did not alter food intake, bodyweight, water intake or urine output in conscious rats. 4. Blood pressure was not altered by sham treatment. Ouabain at 10 μg/kg per day or 100 μg/kg per day did not produce consistent rises in blood pressure. Ouabain at 10 μg/kg per day increased blood pressure on treatment day 12 only (+ 6mmHg; P < 0.05), while at 100μg/kg per day blood pres sure increased on treatment days 16 (+ 9 mmHg; P < 0.05) and day 18 (+ 8mmHg; P < 0.05) only. There was no significant difference in blood pressure between sham and ouabain groups. 5. Renal blood flow was decreased in rats infused with ouabain at 10 μg/kg per day (2.0 ± 0.3 mL/min per 100 g body-weight; n= 5; P < 0.01) and 100 μg/kg per day (2.2 ± 0.4 mL/ min per 100 g bodyweight; n= 7; P < 0.05) compared with sham treatment (3.5 ± 0.2 mL/min per 100 g bodyweight; n= 6). Renal vascular resistance was increased in rats treated with ouabain at 10 μg/kg per day (65.5 ± 12.6 mmHg/mL per min per 100 g bodyweight; n= 5; P < 0.01) and 100 μg/kg per day (66.0 ± 15.6 mmHg/mL per min per 100 g bodyweight; n= 7; P < 0.05) compared with sham treatment (32.6 ± 2.5 mmHg/mL per min per 100 g bodyweight; n= 6). 6. High plasma concentrations of ouabain do not cause consistent increases in blood pressure in conscious Sprague-Dawley rats. 相似文献
64.
65.
66.
67.
68.
69.
Judith L. Black Peter R. A. Johnson Lorraine Alouan Carol L. Armour 《European journal of pharmacology》1990,180(2-3):311-317
This study investigated the effects of neurokinin A (NKA) on cholinergic neural responses in human bronchus. NKA (0.1 nM) did not alter the contractile response to submaximal electrical field stimulation. However, K+ channel blockade with 4-aminopyridine (4-AP) (0.1 mM) potentiated the response to electrical field stimulation (to 182 ± 25% of control, n = 4, P < 0.05) and subsequent addition of NKA in the presence of 4-AP produced further potentiation (to 123 ± 6% of the response to 4-AP n = 4, P < 0.05). Neither 4-AP (0.01 or 0.1 mM) nor NKA in the presence of 4-AP potentiated the actions of exogenous acetylcholine but in these experiments 4-AP itself produced a marked direct contractile response. Thus NKA in the presence of K+ channel blockade potentiates cholinergic neural response in human bronchus and this occurs at a prejunctional site. 相似文献
70.