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   1279篇
  免费   90篇
  国内免费   4篇
耳鼻咽喉   38篇
儿科学   77篇
妇产科学   26篇
基础医学   110篇
口腔科学   26篇
临床医学   178篇
内科学   217篇
皮肤病学   21篇
神经病学   49篇
特种医学   100篇
外科学   126篇
综合类   92篇
预防医学   128篇
眼科学   7篇
药学   74篇
  1篇
中国医学   19篇
肿瘤学   84篇
  2023年   5篇
  2022年   5篇
  2021年   13篇
  2020年   16篇
  2019年   15篇
  2018年   23篇
  2017年   16篇
  2016年   19篇
  2015年   37篇
  2014年   37篇
  2013年   66篇
  2012年   56篇
  2011年   57篇
  2010年   55篇
  2009年   58篇
  2008年   57篇
  2007年   70篇
  2006年   40篇
  2005年   39篇
  2004年   21篇
  2003年   40篇
  2002年   26篇
  2001年   53篇
  2000年   43篇
  1999年   20篇
  1998年   34篇
  1997年   30篇
  1996年   32篇
  1995年   30篇
  1994年   28篇
  1993年   17篇
  1992年   19篇
  1991年   18篇
  1990年   19篇
  1989年   35篇
  1988年   32篇
  1987年   23篇
  1986年   19篇
  1985年   18篇
  1984年   18篇
  1983年   14篇
  1982年   12篇
  1981年   9篇
  1980年   13篇
  1979年   10篇
  1978年   7篇
  1977年   5篇
  1976年   11篇
  1975年   6篇
  1973年   5篇
排序方式: 共有1373条查询结果,搜索用时 31 毫秒
1.
2.
目的评价不同恢复体验类型(RE)的护士群体职业紧张、身心健康、职业生命质量的差异,分析评价恢复体验类型在调节紧张相关健康状况的作用。方法对某市7家三甲医院298名在岗护士,以单纯随机抽样的方法抽取研究样本,采用工作内容问卷(JCQ)测量职业紧张、中文版恢复体验问卷(REQ-C)测量恢复体验水平、聚类分析方法区分恢复体验类型、职业生命质量问卷(QWL7-32)测量紧张相关健康状态。结果聚类分析将298名护士分为充分型、中间型和缺乏型三种RE类型;三种类型的护士心理健康和职业生命质量得分存在差异(P0.01)。不同RE类型的对象,其心理健康与职业生命质量水平随紧张水平变化的趋势不同;因变量为心理健康得分的多元线性回归分析中,结果显示相对于缺乏型来说,充分型的β值为-2.48(P0.05),RE类型为心理健康的独立影响因素。结论不同恢复体验类型对心理健康、职业生命质量的调节作用存在差异。  相似文献   
3.
Oral opportunistic infections developing secondary to human immunodeficiency virus (HIV) infection have been reported from the early days of the epidemic and have been classified by both the EC-Clearinghouse and the World Health Organisation (WHO). Among the fungal infections, oral candidiasis, presenting in African HIV-infected patients has been sporadically documented. We review the literature with respect to candidal carriage, oral candidiasis prevalence and the predictive value of oral candidiasis for a diagnosis of underlying HIV disease in African HIV-infected patients. The use of oral candidiasis as a marker of disease progression, the species of yeasts isolated from the oral cavity in Africa and the resistance of the yeasts to antifungal agents and treatment regimens are discussed. Orofacial lesions as manifestations of the systemic mycoses are rarely seen in isolation and few cases are reported in the literature from Africa. In spite of the high incidence of noma, tuberculosis, chronic osteomyelitis and syphilis in Africa, surprisingly there have been very few reported cases of the oral manifestations of these diseases in HIV-positive individuals. Orofacial disease in HIV-infected patients is associated with marked morbidity, which is compounded by malnutrition. The authors indicate specific research areas, initially directed at the most effective management strategies, which would complete data in this important area.  相似文献   
4.
目的观察2型糖尿病(T2DM)患者行输尿管软镜碎石术(FURL)后出现感染相关并发症的影响因素,探讨T2DM患者术前血糖水平与发生术后感染相关并发症的关系,为T2DM患者在接受FULR术后发生感染相关并发症的早期预防及治疗提供参考。  相似文献   
5.
6.
AimsAdolescents and young adults aged 15–39 years with cancer face unique medical, practical and psychosocial issues. In the UK, principal treatment centres and programmes have been designed to care for teenage and young adult patients aged 13–24 years in an age-appropriate manner. However, for young adults (YAs) aged 25–39 years with cancer, little access to age-specific support is available. The aim of this study was to examine this possible gap by qualitatively exploring YA care experiences, involving patients as research partners in the analysis to ensure robust results.Materials and methodsWe conducted a phenomenological qualitative study with YAs diagnosed with any cancer type between ages 25 and 39 years old in the last 5 years. Participants took part in interviews or focus groups and data were analysed using inductive thematic analysis. Results were shaped in an iterative process with the initial coders and four YA patients who did not participate in the study to improve the rigor of the results.ResultsSixty-five YAs with a range of tumour types participated. We identified seven themes and 13 subthemes. YAs found navigating the healthcare system difficult and commonly experienced prolonged diagnostic pathways. Participants felt under-informed about clinical details and the long-term implications of side-effects on daily life. YAs found online resources overwhelming but also a source of information and treatment support. Some patients regretted not discussing fertility before cancer treatment or felt uninformed or rushed when making fertility preservation decisions. A lack of age-tailored content or age-specific groups deterred YAs from accessing psychological support and rehabilitation services.ConclusionsYAs with cancer may miss some benefits provided to teenagers and young adults in age-tailored cancer services. Improving services for YAs in adult settings should focus on provision of age-specific information and access to existing relevant support.  相似文献   
7.
Antifungal Activity of 3′-Deoxyadenosine (Cordycepin)   总被引:1,自引:0,他引:1       下载免费PDF全文
The antifungal activity of the nucleoside analog 3′-deoxyadenosine (cordycepin) was studied in a murine model of invasive candidiasis. When protected from deamination by either deoxycoformycin or coformycin, both of which are adenosine deaminase inhibitors, cordycepin exhibited potent antifungal efficacy, as demonstrated by prolongation of survival and a decrease in CFU in the kidneys of mice treated with cordycepin plus an adenosine deaminase inhibitor. The antifungal effect was seen with three different Candida isolates: Candida albicans 64, a relatively fluconazole-resistant clinical isolate of C. albicans (MIC, 16 μg/ml), and the fluconazole-resistant Candida krusei. Cordycepin and related compounds may provide another avenue for the discovery of clinically useful antifungal drugs.  相似文献   
8.
目的:了解孟根乌森乌日乐的急性毒性作用剂量及给药后的急性毒性反应和死亡分布情况,确定孟根乌森乌日乐的半数致死量( LD50)。方法用孔氏综合法(改进寇氏法)分为14.30,9.28,6.04,3.92,2.55,1.66 g? kg-16个剂量组,以0.4 mL/10 g的量灌胃给药1次。实验后观察14 d,记录体重变化及不良反应情况。结果孟根乌森乌日乐小鼠半数致死量为5.1597 g? kg-1(95%CI:3.6652~7.2637 g? kg-1)。14 d内未出现明显不良反应症状且体重有增长趋势。结论孟根乌森乌日乐的急性毒性实验的半数致死量为临床用药量的100倍,提示单次口服较为安全。  相似文献   
9.
TA Lane  ; GE Lamkin 《Transfusion》1988,28(3):237-242
Granulocyte (PMN) concentrates collected for transfusion to septic, neutropenic patients are stored in the blood bank for various periods of time before they are given. Current methods of blood bank storage of PMN concentrates are associated with impaired in vitro PMN chemotaxis (CTX) and in vivo recovery and circulation kinetics after 24 hours of storage. This suggested the possibility that PMN may become hyperadherent during storage. To test this hypothesis, PMN concentrates were harvested and stored at both 22 and 6 degrees C and their adherence properties to relevant biologic surfaces, endothelial cell (EC) monolayers, and extracellular matrix (ECM) derived from endothelium were measured. Adherence was measured within 4 hours of collection and after 24 and 48 hours of storage. The aggregation properties of fresh and stored PMN were also studied. The adherence of fresh, unstimulated PMN to EC and ECM (31 +/- 5% and 34 +/- 4%, respectively) increased significantly after storage for 24 hours (EC = 41 +/- 8%; ECM = 43 +/- 4%) at 22 degrees C. F-Met-Leu-Phe (FMLP) stimulated the adherence of fresh PMN (EC = 37 +/- 4%; ECM = 42 +/- 4%; p less than 0.05). The adherence of PMN stored at 22 degrees C was further stimulated by FMLP (EC = 46 +/- 6%; ECM = 50 +/- 4%). PMN stored at 6 degrees C had significantly higher adherence than PMN stored at 22 degrees C, and the percentage of increase in adherence induced by FMLP was attenuated in PMN stored at 6 degrees C.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   
10.
Sensitive skin syndrome was first described in 1977; however, no robust study has been carried out to evaluate its prevalence in Japan. A national representative sample of the Japanese population over the age of 18 years was taken. Individuals were questioned by telephone and selected according to the quota method. When asked “Do you have a sensitive skin?”, 52.84% of men and 55.98% of women answered “rather sensitive” or “very sensitive”. There was no significant difference (P = 0.22) between the two sexes. The non‐response rate among respondents was zero, suggesting that the term “sensitive skin” held a meaning for the majority of the population. Concerning questions about the onset of a rash, tingling or irritation in the presence of various factors, such as emotional issues, cold, heat, sun, dry air, air‐conditioning, water, air pollution and temperature variations, respondents with rather sensitive or very sensitive skin responded “yes” more often than others: approximately three‐times more often for water (18.97%/6.15%), air pollution (39.29%/12.45%) and warm climatic conditions (29.74%/9.8%). To our knowledge, this epidemiological study is the first to focus on sensitive skin among Japanese people of this century. It is of particular interest for two reasons: (i) it was conducted on a representative sample of the Japanese population; and (ii) the methodology used was identical to that used for sensitive skin assessment studies conducted in Europe and the USA, making it possible to draw certain comparisons.  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