全文获取类型
收费全文 | 865篇 |
免费 | 20篇 |
国内免费 | 35篇 |
专业分类
儿科学 | 23篇 |
妇产科学 | 22篇 |
基础医学 | 92篇 |
口腔科学 | 12篇 |
临床医学 | 157篇 |
内科学 | 90篇 |
皮肤病学 | 197篇 |
神经病学 | 28篇 |
特种医学 | 156篇 |
外科学 | 31篇 |
综合类 | 35篇 |
预防医学 | 15篇 |
眼科学 | 5篇 |
药学 | 26篇 |
肿瘤学 | 31篇 |
出版年
2023年 | 5篇 |
2021年 | 4篇 |
2020年 | 3篇 |
2019年 | 4篇 |
2018年 | 4篇 |
2017年 | 4篇 |
2016年 | 3篇 |
2015年 | 4篇 |
2014年 | 7篇 |
2013年 | 17篇 |
2012年 | 14篇 |
2011年 | 22篇 |
2010年 | 10篇 |
2009年 | 18篇 |
2008年 | 29篇 |
2007年 | 31篇 |
2006年 | 26篇 |
2005年 | 39篇 |
2004年 | 21篇 |
2003年 | 20篇 |
2002年 | 22篇 |
2001年 | 25篇 |
2000年 | 16篇 |
1999年 | 22篇 |
1998年 | 21篇 |
1997年 | 24篇 |
1996年 | 27篇 |
1995年 | 21篇 |
1994年 | 18篇 |
1993年 | 38篇 |
1992年 | 15篇 |
1991年 | 20篇 |
1990年 | 15篇 |
1989年 | 31篇 |
1988年 | 30篇 |
1987年 | 33篇 |
1986年 | 29篇 |
1985年 | 53篇 |
1984年 | 28篇 |
1983年 | 29篇 |
1982年 | 22篇 |
1981年 | 18篇 |
1980年 | 15篇 |
1979年 | 26篇 |
1978年 | 24篇 |
1977年 | 4篇 |
1976年 | 3篇 |
1975年 | 4篇 |
1974年 | 1篇 |
1971年 | 1篇 |
排序方式: 共有920条查询结果,搜索用时 15 毫秒
1.
Pyoderma gangrenosum and related disorders 总被引:2,自引:0,他引:2
J P Callen 《The Medical clinics of North America》1989,73(5):1247-1261
Pyoderma gangrenosum (PG) is an uncommon ulcerative cutaneous condition with distinctive clinical characteristics and a frequent association with systemic diseases. Most frequently among the associated disease list are: inflammatory bowel disease, arthritis, and a variety of hematologic disorders. There is no specific treatment of PG; however, the effective treatment of an accompanying systemic disease, local therapy, and/or the use of topical or systemic agents known to be useful in neutrophil disorders, have been beneficial in most patients. 相似文献
2.
3.
4.
5.
Bone marrow and peripheral blood cultures of chronic lymphocytic leukemia patients were mitogenically stimulated with TPA (12-0-tetradecanylphorbol-13-acetate). Clonal cytogenetic abnormalities were detected in frequencies varying from 15% to 100%, in five of the six patients studied. Parallel studies with pokeweek mitogen showed a much lower level of stimulation and only two abnormal clones were detected. The chromosome abnormalities described in this study are similar to those reported in CLL by other authors, particularly with respect to trisomy 12 and deletion 11q. A significant frequency of hypodiploidy and chromosome deletion was also detected in this study, and further studies are underway to determine the significance of these findings. 相似文献
6.
Small marker chromosomes in man: origin from pericentric heterochromatin of chromosomes 1, 9, and 16. 总被引:10,自引:4,他引:10
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)
D F Callen M L Ringenbergs J C Fowler C J Freemantle E A Haan 《Journal of medical genetics》1990,27(3):155-159
Three patients with different marker chromosomes were screened by in situ hybridisation using biotinylated probes to chromosome specific pericentric repeats to determine the chromosomal origin of the marker. Each marker had a different origin, with one from each of chromosomes 1, 9, and 16. This is the first time that autosomal marker chromosomes consisting of a small ring have been shown to be derived from the pericentric heterochromatin of metacentric and submetacentric chromosomes. Evidence suggests that such markers are not associated with any significant risk of phenotypic abnormalities, but additional cases need to be studied. 相似文献
7.
K Callen 《Public health reports (Washington, D.C. : 1974)》1983,98(4):336-343
Part of a Department of Health and Human Services initiative against teenage alcohol abuse, a national Conference for Youth on Drinking and Driving--held March 26-28, 1983 in Chevy Chase, Md. --brought together more than 300 high school student delegates and school superintendents from every State and Territory. The conference spotlighted successful programs that students around the country have undertaken to promote sober driving--programs that incorporate these key principles: (a) they rely almost solely on peer leadership "by students for students"; (b) they employ a "holistic" approach to health promotion, emphasizing self-esteem and alternatives to alcohol and drug abuse; and (c) they use the resources of the whole community. Working with student leaders of these model programs, conference delegates devised ways to launch similar programs in their own schools and communities and to enlist help from parents, teachers, lawmakers, the media, and business and civic groups. The Department of Health and Human Services plans to hold similar conferences annually, to mobilize future generations of students against drunk driving. 相似文献
8.
9.
回春液补肾助阳药效学的实验研究 总被引:2,自引:0,他引:2
回春液由人参、鹿茸、貂鞭等名贵中药组成。有补肾助阳,填精益气等功效。药效学研究证实,该药有促进幼鼠发育及增加去势大鼠前列腺——精液囊的重量,亦显著增加小鼠血红蛋白的含量,表明回春液有雄性激素样作用。 相似文献
10.
Reviewed by Bonnie Callen 《Issues in mental health nursing》2013,34(7):795-797
Older women report more loneliness than male peers. Loneliness is an area of concern related to the well being of older women because it is a cause of emotional distress and is linked to a variety of health problems in older individuals. Life changes, including widowhood and relocation, are associated with increased vulnerability to loneliness. Gender, social, and cultural factors influence the experience of loneliness in older women. Cognitive and interactionist theoretical approaches to loneliness have utility for nursing practice and research with older women who experience loneliness. 相似文献