首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   9123篇
  免费   714篇
  国内免费   24篇
耳鼻咽喉   168篇
儿科学   286篇
妇产科学   186篇
基础医学   1057篇
口腔科学   195篇
临床医学   1186篇
内科学   1703篇
皮肤病学   128篇
神经病学   756篇
特种医学   366篇
外国民族医学   2篇
外科学   1265篇
综合类   163篇
一般理论   11篇
预防医学   1022篇
眼科学   217篇
药学   612篇
中国医学   17篇
肿瘤学   521篇
  2022年   94篇
  2021年   200篇
  2020年   126篇
  2019年   174篇
  2018年   202篇
  2017年   170篇
  2016年   185篇
  2015年   226篇
  2014年   308篇
  2013年   403篇
  2012年   504篇
  2011年   495篇
  2010年   324篇
  2009年   290篇
  2008年   453篇
  2007年   414篇
  2006年   369篇
  2005年   390篇
  2004年   304篇
  2003年   298篇
  2002年   291篇
  2001年   218篇
  2000年   212篇
  1999年   202篇
  1998年   135篇
  1997年   120篇
  1996年   115篇
  1995年   116篇
  1994年   86篇
  1993年   85篇
  1992年   151篇
  1991年   138篇
  1990年   167篇
  1989年   116篇
  1988年   134篇
  1987年   133篇
  1986年   110篇
  1985年   116篇
  1984年   95篇
  1983年   83篇
  1982年   65篇
  1981年   58篇
  1979年   79篇
  1978年   68篇
  1977年   51篇
  1976年   55篇
  1975年   57篇
  1973年   63篇
  1972年   55篇
  1969年   54篇
排序方式: 共有9861条查询结果,搜索用时 0 毫秒
61.
After 40 years of communism, Hungary is a tired nation. But now an enormous task faces its government; bringing its antiquated healthcare system into line with those of western Europe. Annabelle May reports from a conference in Budapest.  相似文献   
62.
63.
The mechanisms of action and clinical applications of electric differential treatment (EDiT) and Endosan in the treatment of ovarian cysts and concomitant symptoms are reviewed. Possible mechanisms of action include an increased level of cyclic AMP, stimulation of endorphin release, anti-inflammatory action, and steroidogenesis resulting from normalization of intercellular communication. Favorable results in the clinical setting were achieved in the treatment of ovarian cysts. Treatment success was reflected in a significant reduction in overall cyst size as well as amelioration of various concomitant symptoms, including fever, chills, inflammation, and abdominal pain. EDiT and Endosan were shown to have potent analgesic and anti-inflammatory effects. No adverse effects have been reported.  相似文献   
64.
Zusammenfassung Zusätzlich wurden physikalische und chemische Untersuchungen über den Einfluß von dynamischem Interferenzstrom (DIC) auf die Knochenheilung durchgeführt, nachdem bei 24 Schwarzkopfschafen eine Querosteotomie des Radius vorgenommen worden war. Nach instabiler Osteosynthese wurde die Osteotomiezone wiederholt mit DIC verschiedener mA—Stärken behandelt. (Methodische Einzelheiten sind in Teil I beschrieben). Die Behandlung mit dynamischem Interferenzstrom führte im behandelten Gewebe zu steigenden Temperaturen, die von den mA—Stärken abhängig waren. Weiterhin wurden Zusammenhänge zwischen DIC—mA—Intensität und dem Vorkommen von Hydroxyprolin, einer kollagenspezifischen Aminosäure, nachgewiesen, welches eine erhöhte Calcifizierungsaktivität zur Folge hatte. Messungen des Calcium— und Phosphorgehaltes im neugebildeten Knochengewebe wiesen bei den mit DIC behandelten Tieren vollständige Mineralisation zu einem viel früheren Zeitpunkt als bei den unbehandelten, nach gleichem Verfahren operierten Kontrolltieren auf. Ob DIC einen spezifischen Reiz auf die Knochenneubildung heilender Knochen ausübt, ist noch nicht vollständig geklärt.
Bone healing and Dynamic Interferential Current (DIC)
Summary In the course of supplementary physical and chemical investigations of the influence ofDynamicInterferential Current (DIC) on bone healing 24 black-head sheep were subjected to transversal osteotomy of the radius. After an instable osteosynthesis the site was exposed to repeated therapy with DIC of varying mA intensity. (Methodological details are described in part 1.) DIC therapy resulted in altering the temperatures in the treated tissue, dependent on the mA intensity. Further associations were verified between DIC intensity and the occurrence of hydroxyprolin, an amino acid specific collagen, which also reflected increased calcifying activity. Measurements of the calcium and phosphorus levels in the regenerated (newly forming) bone tissue documented full mineralization in the DIC-treated animals at a much earlier date than in the untreated controls that had undergone similar operations. Whether DIC specifically stimulates osteogenesis within healing bones is still unclear.
  相似文献   
65.
Willuhn G  May S 《Planta medica》1982,46(3):153-158
From tissue cultures (callus) of the soladulcidine strain of Solanum dulcamara L. the 4,4-dimethylsterols cycloartenol, cycloartanol, 24-dihydrolanosterol, and 24-methylenecycloartanol and the sterols cholesterol, 24-methylenecholesterol, campesterol, stigmasterol, isofucosterol, and sitosterol were identified by GC and GC/MS. In the callus the sterols are present in the free form and as esters, glucosides and palmitic esters of the glucosides. The total contents and the contents of the combined forms were determined photometrically (total: 0.19% on dry weight basis, 59.4% glucosides and acylated glucosides, 4.7% esters, 35.9% free). The main fatty acids of the petrolether soluble lipids of the callus (1.78%) are palmitic-, linoleic-, and linolenic acid.  相似文献   
66.
An experiment is described in which three male volunteers, who fully understood the nature of the project, were given doses of heroin which could have led to addiction if the subjects had proved to be physiologically or psychologically vulnerable to developing a state of addiction. The experiment was discussed most carefully by the Ethics Committee of the unit where it was conducted, and the subjects were themselves the investigators. The objective was to learn about the initial stages of the adaptation to heroin, of which nothing was known as heroin addicts usually come to the doctor when the habit is firmly established. A physician, who has studied the subject of drug addiction in a special clinic, is the first commentator, the second a lawyer and the third an associate professor of social ethics. These three experts are not discussing the results or the methodology of the experiment but whether the decision of the Ethics Committe was the right one.  相似文献   
67.
68.
69.
70.
Background and Aim:  This article provides an overview of a phenomenological investigation of spirituality with six people who have experienced mental illness. The study aimed to gain a greater understanding of the phenomenon of spirituality and its relationships to occupation and the experience of mental illness.
Methods and Results:  Participants were interviewed and the interviews were audiotaped and transcribed verbatim. Findings emerged through multiple readings and gradually constructed meanings from the data. Spirituality was found to be: unique to each participant, a journey through life, vitally important to participants, manifested as 'spiritual occupations', the foundation of meaningful doing, important socially as well as individually, and was found to support participants in coping with mental illness. This article focuses on the 'meta', integrative theme of spirituality as life sustaining. It concludes with the notion that spirituality is essential to the participants and is a significant aspect of their occupational behaviour.
Conclusion:  It is recommended that occupational therapists give themselves a 'licence' to discuss spirituality in practice and that they commit to learning more about how spirituality is a part of the lives of their clients.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号