全文获取类型
收费全文 | 9029篇 |
免费 | 610篇 |
国内免费 | 16篇 |
专业分类
耳鼻咽喉 | 63篇 |
儿科学 | 380篇 |
妇产科学 | 265篇 |
基础医学 | 1016篇 |
口腔科学 | 113篇 |
临床医学 | 2030篇 |
内科学 | 1180篇 |
皮肤病学 | 98篇 |
神经病学 | 877篇 |
特种医学 | 185篇 |
外科学 | 716篇 |
综合类 | 113篇 |
一般理论 | 27篇 |
预防医学 | 1309篇 |
眼科学 | 135篇 |
药学 | 542篇 |
中国医学 | 41篇 |
肿瘤学 | 565篇 |
出版年
2023年 | 54篇 |
2022年 | 89篇 |
2021年 | 172篇 |
2020年 | 119篇 |
2019年 | 161篇 |
2018年 | 191篇 |
2017年 | 195篇 |
2016年 | 198篇 |
2015年 | 199篇 |
2014年 | 280篇 |
2013年 | 411篇 |
2012年 | 651篇 |
2011年 | 712篇 |
2010年 | 387篇 |
2009年 | 342篇 |
2008年 | 612篇 |
2007年 | 654篇 |
2006年 | 597篇 |
2005年 | 591篇 |
2004年 | 641篇 |
2003年 | 550篇 |
2002年 | 521篇 |
2001年 | 91篇 |
2000年 | 91篇 |
1999年 | 93篇 |
1998年 | 112篇 |
1997年 | 78篇 |
1996年 | 77篇 |
1995年 | 68篇 |
1994年 | 65篇 |
1993年 | 52篇 |
1992年 | 43篇 |
1991年 | 45篇 |
1990年 | 32篇 |
1989年 | 45篇 |
1988年 | 26篇 |
1987年 | 40篇 |
1986年 | 23篇 |
1985年 | 31篇 |
1984年 | 26篇 |
1983年 | 38篇 |
1982年 | 36篇 |
1981年 | 27篇 |
1980年 | 27篇 |
1979年 | 26篇 |
1978年 | 26篇 |
1977年 | 14篇 |
1976年 | 17篇 |
1975年 | 14篇 |
1974年 | 12篇 |
排序方式: 共有9655条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
Allison J. Cowin PhD ; Nicholas Hatzirodos BSc ; Justin Rigden PhD ; Robert Fitridge FRACS ; David A. Belford PhD 《Wound repair and regeneration》2006,14(4):421-426
High levels of tumor necrosis factor-alpha (TNF-alpha), a pro-inflammatory cytokine, are present in the wound fluid of chronic nonhealing wounds. This leads to increased inflammation, cytokine expression, and ultimately results in impaired wound healing and tissue destruction. Etanercept is a recombinant fusion protein that consists of the soluble TNF receptor (p75) linked to the Fc portion of human IgG1. It is an effective inhibitor of TNF-alpha and has been shown to provide rapid and sustained improvement in rheumatoid arthritis by acting as a soluble receptor binding TNF-alpha and preventing its proinflammatory activities. Therefore, the aim of this study was to determine whether Etanercept could inhibit TNF-alpha activity in chronic wound fluid. Wound fluid was collected from the venous leg ulcers of 16 different patients. The effect of Etanercept on TNF-alpha activity was evaluated using both a TNF-alpha bioassay and an enzyme-linked immunoassay. Etanercept was found to reduce the cytotoxic effect of chronic wound fluid on L929 fibroblasts by approximately 30% and neutralized TNF-alpha binding in the enzyme-linked immunoassay by up to 80%. Direct application of Etanercept to chronic wounds may therefore reduce the inflammatory activity of TNF-alpha, which could reduce the chronicity of venous leg ulcers and thus aid in the healing of these wounds. 相似文献
5.
目的 保持皮肤清洁,使病人身心舒适;维持病人皮肤完整性,治疗或预防皮肤并发症.方法 ①大小便失禁病人皮肤完整的床上擦浴,bid,排便后及时清洗,用电吹风或红外线照射,保持会阴部、尾骶部皮肤干燥;应用一次性尿垫、阴茎套、留置导尿管等辅助工具接尿;②褥疮护理使用气垫床,翻身防褥疮护理,q2h,对褥疮创面给予换药、湿润烧伤膏外敷,qd;③外阴炎给予达克宁霜或康纳乐霜外涂,tid.结果 入院时皮肤完好的320例病人褥疮发生率为0.5%,皮肤炎发生率为0.85%,尿路感染发生率为1.5%;50例皮肤炎病人全部治愈,86例带入院褥疮治愈率为93%.结论 对大小便失禁的病人实施良好的皮肤护理,可促进病人舒适,维持病人皮肤完整性,治疗和预防皮肤并发症的发生. 相似文献
6.
Dorothy Doughty Janet Ramundo Phyllis Bonham Janice Beitz Paula Erwin-Toth Renee Anderson Bonnie Sue Rolstad 《Journal of wound, ostomy, and continence nursing》2006,33(2):125-30; quiz 131-2
Wound assessment is a key element of effective wound care, and assessment of pressure ulcers includes accurate determination of wound stage. Although the original staging system established by Shea was based on his understanding of the pathology involved in pressure ulcer development, subsequent staging systems (and the one currently in use) were intended simply to establish the level of tissue damage. Recently, clinicians have drawn attention to numerous limitations associated with the current staging system, including the inability to differentiate between an inflammatory response involving intact skin and a deep tissue injury (deep bruising) underneath intact skin. This is a clinically significant difference because clinicians have noted that most inflammatory responses resolve with intervention, whereas most areas of deep tissue injury progress to full-thickness ulcers even when appropriate intervention is provided. A second area of controversy involves partial-thickness (Stage 2) lesions; because many of these lesions are caused by maceration and/or friction (as opposed to pressure) clinicians are frequently unclear regarding which of these lesions should be staged. In response to these concerns, the National Pressure Ulcer Advisory Panel convened a consensus forum and published white papers to clearly outline the issues; they solicited clinician feedback on the white papers and the Wound, Ostomy, Continence Nurses Society provided a written response. This article summarizes the key points of the white papers, WOCN Society response, and consensus forum discussion. 相似文献
7.
American Diabetes Association The initial draft of this paper was prepared by Rebecca G. Schafer MS RD ; Betsy Bohannon MS RD; Marion J. Franz MS RD; Janine Freeman RD; Alberta Holmes MS RD; Sue McLaughlin RD; Linda B. Haas RN; Davida F. Kruger MSN RN; Rodney A. Lorenz MD; Molly M.McMahon MD 《Journal of the American Dietetic Association》1997,97(1):52-53
8.
9.
10.
Alan J Thomas Sue Davis I Nicol Ferrier Rajesh N Kalaria John T O'Brien 《Neuropsychopharmacology》2004,55(6):652-655
BACKGROUND: Neuroimaging reports of increases in signal hyperintensities in white and deep gray matter and other work indicate that there might be an inflammatory response in affective disorders. METHODS: The microvascular immunoreactivity of intercellular adhesion molecule-1 and vascular cell adhesion molecule-1 was measured with image analysis in postmortem tissue from the anterior cingulate cortex (ACC) and dorsolateral prefrontal cortex (DLPFC) from 15 unipolar and 15 bipolar subjects and compared with each other and with 15 subjects with schizophrenia and 15 control subjects. RESULTS: Intercellular adhesion molecule-1 immunoreactivity in gray and white matter of the ACC in bipolar subjects was increased compared with control subjects (gray: p =.001; white: p <.001) and schizophrenic subjects (gray: p =.016; white: p =.025) and modestly increased in white matter compared with unipolar subjects (p =.049). No such differences were found in the DLPFC. CONCLUSIONS: These findings are consistent with the presence of an inflammatory response in the ACC in bipolar disorder. 相似文献