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   476篇
  免费   37篇
  国内免费   105篇
儿科学   28篇
妇产科学   7篇
基础医学   45篇
口腔科学   32篇
临床医学   108篇
内科学   107篇
皮肤病学   6篇
神经病学   11篇
特种医学   69篇
外科学   57篇
综合类   37篇
预防医学   22篇
眼科学   5篇
药学   51篇
中国医学   1篇
肿瘤学   32篇
  2021年   9篇
  2020年   2篇
  2019年   6篇
  2018年   7篇
  2017年   8篇
  2016年   10篇
  2015年   11篇
  2014年   12篇
  2013年   22篇
  2012年   13篇
  2011年   13篇
  2010年   24篇
  2009年   20篇
  2008年   7篇
  2007年   61篇
  2006年   13篇
  2005年   24篇
  2004年   17篇
  2003年   13篇
  2002年   14篇
  2001年   6篇
  2000年   13篇
  1999年   6篇
  1998年   45篇
  1997年   35篇
  1996年   38篇
  1995年   18篇
  1994年   22篇
  1993年   15篇
  1992年   11篇
  1991年   3篇
  1990年   11篇
  1989年   13篇
  1988年   14篇
  1987年   12篇
  1986年   12篇
  1985年   5篇
  1984年   3篇
  1982年   3篇
  1981年   4篇
  1980年   3篇
  1979年   1篇
  1978年   1篇
  1977年   4篇
  1976年   6篇
  1975年   3篇
  1974年   1篇
  1971年   1篇
  1965年   1篇
  1960年   1篇
排序方式: 共有618条查询结果,搜索用时 15 毫秒
91.

Background  

Because of a high cardiovascular disease (CVD) risk in people with Familial Hypercholesterolemia (FH), early prevention of cardiovascular disease is important for health gain and cost reduction. This project focuses on the development and evaluation of an innovative intervention aiming to reduce CVD risk by promoting a healthy lifestyle among people with FH.  相似文献   
92.
BACKGROUND: Uterine perforation is the most serious complication associated with an intrauterine contraceptive device (IUD). Minimally invasive techniques, such as hysteroscopy and advanced laparoscopy, are ideally suited to the diagnosis and surgical management of the perforated IUD. CASE REPORTS: Three cases of uterine perforation caused by an IUD and treated with endoscopic surgery are presented. In all 3 cases, the IUD was located by using x-rays, ultrasonography, or pelvic magnetic resonance imaging. Diagnostic laparoscopy was performed to identify the specific location of the IUD and to remove it. All patients recovered without incident. CONCLUSION: The gynecologic surgeon should acquire familiarity with the complications of, and proficiency in managing, perforated and ectopic IUDs by using modern surgical techniques that permit the patient's rapid return to health.  相似文献   
93.
刘新泳  徐丽君 《药学学报》1994,29(2):153-157
In order to search for more ideal antiviral drugs,21 substituted pyriiT1idinone derivatives were designed and synthesized,among which 11 were not reported before. The cheinicalstructures were characterized by elemen tal and spectral analysis. The serum interferon - inducing activity was tested in mice. All 2-amino-5-bromo-6-substituted-4-(3H)pyrimidinone compounds were shown to have interferon inducing activity.The corresponding substituted pyrimidine thiones were less active.The new compounds of 6-sulfophenyl derivatives are soluble in、water, but the interferon-inducing activity are not higher than the original compound of ABPP.  相似文献   
94.
抗病毒药物2,5,6-三取代-4(3H)嘧啶酮衍生物的合成及诱导干扰素活性刘新泳,徐丽君(山东医科大学药学系济南250012)取代嘧啶酮类化合物是一类小分干扰素诱导剂,有抗病毒、抗肿瘤、杀菌抑霉、诱导干扰素和白介素、免疫调节等多种生物活性(1)。目前?..  相似文献   
95.
The effect of cyclodextrin (beta-CD) on the solubility and dissolution rate of various paracetamol dispersion powders (1:1 w/w), and tablets was studied. Lower solubility was exhibited by a spray dried solid dispersion made from paracetamol-Ethocel-Macrogol 6000 (95:2:3). The improvement in solubility was influenced by complexation with beta-CD and the crystalline nature of the powder products made by different procedures. The difference in crystallinity was confirmed by X-ray powder diffraction patterns. The dissolution rate of paracetamol from tablets made from the solid dispersions was satisfactory compared with paracetamol alone. The differences between the dissolution rate from the examined paracetamol tablets resulted from the different solubility of each powder and from the structural changes of particles which influenced the consolidation of the tablet mass.  相似文献   
96.
OBJECTIVE: We examined the influence of family history of alcoholism on the presentation and course of inpatients with eating disorders (ED) by comparing ED behaviors, substance abuse behaviors, and psychopathology of patients with alcoholic first-degree relatives (AFDR+) to those without alcoholic first-degree relatives (AFDR-). METHOD: Female inpatients admitted to a specialty eating disorders service completed demographic, family history, behavioral, and psychological questionnaires (N=217). Body mass index (BMI) at admission and discharge, length of stay, and rates of weight gain were calculated. RESULTS: AFDR+ participants did not differ from AFDR- participants diagnostically, but AFDR+ participants did report higher lifetime frequencies of several ED and substance abuse behaviors. Measures of ED psychopathology and personality vulnerability were also elevated in the AFDR+ group. DISCUSSION: ED inpatients with a first-degree family history of alcoholism demonstrate increased psychopathology in eating behavior, substance use, and personality vulnerability domains. While the genetic diathesis for alcoholism is likely distinct from that for eating disorders, these findings suggest that first-degree relative history of alcoholism may nevertheless exert a negative influence on eating disorder behaviors.  相似文献   
97.
98.
IntroductionAcute respiratory distress syndrome (ARDS) is a common clinical syndrome with high mortality and long-term morbidity. To date there is no effective pharmacological therapy. Aspirin therapy has recently been shown to reduce the risk of developing ARDS, but the effect of aspirin on established ARDS is unknown.MethodsIn a single large regional medical and surgical ICU between December 2010 and July 2012, all patients with ARDS were prospectively identified and demographic, clinical, and laboratory variables were recorded retrospectively. Aspirin usage, both pre-hospital and during intensive care unit (ICU) stay, was included. The primary outcome was ICU mortality. We used univariate and multivariate logistic regression analyses to assess the impact of these variables on ICU mortality.ResultsIn total, 202 patients with ARDS were included; 56 (28%) of these received aspirin either pre-hospital, in the ICU, or both. Using multivariate logistic regression analysis, aspirin therapy, given either before or during hospital stay, was associated with a reduction in ICU mortality (odds ratio (OR) 0.38 (0.15 to 0.96) P = 0.04). Additional factors that predicted ICU mortality for patients with ARDS were vasopressor use (OR 2.09 (1.05 to 4.18) P = 0.04) and APACHE II score (OR 1.07 (1.02 to 1.13) P = 0.01). There was no effect upon ICU length of stay or hospital mortality.ConclusionAspirin therapy was associated with a reduced risk of ICU mortality. These data are the first to demonstrate a potential protective role for aspirin in patients with ARDS. Clinical trials to evaluate the role of aspirin as a pharmacological intervention for ARDS are needed.  相似文献   
99.
BackgroundEstablished clinical guidelines identify current alcohol abuse and dependence as contraindications for weight loss surgery. However, guidance on how to best assess alcohol use in bariatric patients has not been elucidated. Furthermore, concerns with postoperative alcohol use/abuse and increased sensitivity warrant the development of recommendations on appropriate interventions for patients pursuing weight loss surgery. Our objective was to review the current data on bariatric surgery and substance abuse/addiction, with an emphasis on alcohol use, offer guidance on how to assess the risk of such problems, and provide preliminary recommendations on treating high-risk patients.MethodsThe relevant published data on alcohol use, abuse, and dependence in pre- and postoperative bariatric patients was reviewed. Also, the putative mechanisms of increased alcohol sensitivity after weight loss surgery were examined.ResultsAlthough current alcohol abuse/dependence is less than that in population-base rates, bariatric surgery candidates have a greater history of alcohol use disorders. Physiologic changes after surgery can also change vulnerability to problematic alcohol use, and many patients continue to consume alcohol after surgery. Assessment techniques and strategies to provide informed consent and education on alcohol were included from the Bariatric and Metabolic Institute at the Cleveland Clinic.ConclusionWeight loss surgery candidates might have a greater lifetime risk of alcohol use disorders and greater sensitivity to the intoxicating effects of alcohol after surgery. Adequate screening, assessment, and preoperative preparation could help mitigate this risk. Future research should examine the efficacy of such risk management strategies.  相似文献   
100.
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