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   436篇
  免费   19篇
  国内免费   1篇
耳鼻咽喉   4篇
儿科学   12篇
妇产科学   7篇
基础医学   60篇
口腔科学   39篇
临床医学   34篇
内科学   63篇
皮肤病学   8篇
神经病学   63篇
特种医学   3篇
外科学   43篇
综合类   3篇
预防医学   53篇
眼科学   3篇
药学   45篇
中国医学   1篇
肿瘤学   15篇
  2023年   3篇
  2022年   13篇
  2021年   12篇
  2020年   9篇
  2019年   12篇
  2018年   20篇
  2017年   10篇
  2016年   10篇
  2015年   10篇
  2014年   17篇
  2013年   25篇
  2012年   37篇
  2011年   36篇
  2010年   21篇
  2009年   20篇
  2008年   27篇
  2007年   27篇
  2006年   24篇
  2005年   25篇
  2004年   16篇
  2003年   19篇
  2002年   20篇
  2001年   1篇
  2000年   1篇
  1998年   1篇
  1995年   5篇
  1994年   3篇
  1993年   1篇
  1990年   1篇
  1989年   1篇
  1988年   1篇
  1986年   1篇
  1984年   1篇
  1982年   2篇
  1979年   1篇
  1978年   1篇
  1977年   1篇
  1974年   1篇
  1973年   1篇
  1972年   1篇
  1971年   2篇
  1970年   4篇
  1969年   1篇
  1965年   2篇
  1962年   1篇
  1957年   1篇
  1945年   1篇
  1940年   2篇
  1939年   2篇
  1921年   2篇
排序方式: 共有456条查询结果,搜索用时 15 毫秒
1.
2.
Aim and methods  Nutrition, unhealthy lifestyles and cancer appear to be strictly related, but few authors have analysed the interest in dietary information of cancer patients and their families. This survey was conducted in the Veneto area (Italy) to investigate the concern of cancer patients and their family members about diet as a health tool before and after diagnosis of cancer. Results  Seven hundred and four questionnaires were collected: 380 from cancer patients and 324 from family members of cancer subjects. Breast cancer (BC) was the most frequent disease for patients (61.8%) as well as families (26.5%). Generally, the importance of having precise diet information after diagnosis is recognised by 40.3% of patients, with significant differences between the various types of cancer: gastric and colon/rectum cancer (GCC) patients were more concerned than BC women about precise information concerning a diet to follow immediately after diagnosis (p = 0.000, ODs = 3.10, CI 1.68–5.71) or during treatments (p = 0.001, ODs = 2.67, CI 1.46–4.89). The nutritional information is supplied to patients in 34% of cases and to relatives in 30.3%, often from non-medical sources. In total healthcare workers (family doctor, oncologist, surgeon, dietician) represented the exclusive source of dietary information for 24.9% of patients and 22.9% of family members. Diet after diagnosis changes in 69.1% of GCC patients and in 39.2% of BC women. Relatives, particularly women, report difficulties preparing patients’ meals in 30.7% of cases, changes in the eating habits of the entire family in 29.9% and discontent connected with patients diet in 13.9%. The concern about proper nutrition after diagnosis increases more in GCC subjects (p < 0.025) when compared to BC subjects and in patients with more recent diagnosis (p < 0.041) when compared with patients with diagnosis >5 years ago, while in family members the interest in diet after diagnosis increases more in women than in men (p < 0.030) without other differences regarding the degree of relationship, type of cancer or diagnosis time. Relatives (92.7%) have more interest in nutritional education than patients (74.9%). Cancer patients <65 years were more interested in educational initiatives concerning nutrition (p = 0.000, ODs = 4.46, CI 2.6–7.4) than older patients (>65 years) and female subjects were more concerned than male patients (p = 0.008, ODs = 2.11, CI 1.2–3.6). Conclusions  The interest in the dietary knowledge and in educational initiatives concerning nutrition is high in cancer patients and their relatives, although it decreases with the age. The poor attention paid to nutrition of cancer patients by various healthcare workers deserves consideration, since the psychophysical wellbeing and perhaps also survival of cancer patients can be improved by correct dietary management, as well as, naturally, by the principal treatments themselves.  相似文献   
3.
4.
To overcome the challenge of obtaining accurate data on community food retail, we developed an innovative tool to automatically capture food retail data from Google Earth (GE). The proposed method is relevant to non-commercial use or scholarly purposes. We aimed to test the validity of web sources data for the assessment of community food retail environment by comparison to ground-truth observations (gold standard). A secondary aim was to test whether validity differs by type of food outlet and socioeconomic status (SES). The study area included a sample of 300 census tracts stratified by SES in two of the largest cities in Brazil, Rio de Janeiro and Belo Horizonte. The GE web service was used to develop a tool for automatic acquisition of food retail data through the generation of a regular grid of points. To test its validity, this data was compared with the ground-truth data. Compared to the 856 outlets identified in 285 census tracts by the ground-truth method, the GE interface identified 731 outlets. In both cities, the GE interface scored moderate to excellent compared to the ground-truth data across all of the validity measures: sensitivity, specificity, positive predictive value, negative predictive value and accuracy (ranging from 66.3 to 100%). The validity did not differ by SES strata. Supermarkets, convenience stores and restaurants yielded better results than other store types. To our knowledge, this research is the first to investigate using GE as a tool to capture community food retail data. Our results suggest that the GE interface could be used to measure the community food environment. Validity was satisfactory for different SES areas and types of outlets.  相似文献   
5.
Nine patients with mild or moderate essential hypertension were studied at the Vargas Hospital of Caracas, Venezuela. After antihypertensive treatment discontinuation, all patients were placed on placebo during a 1-week period, after which domperidone, a peripheral DA(2) dopaminergic blocker, was orally administered at the dose of 20 mg every 12 h during a period of 1 week. A final 1-week period of bromocriptine, 2.5 mg orally every 8 h, followed the domperidone period. Cold pressor test caused an increase of mean blood pressure and of heart rate, which was more accentuated after adding bromocriptine. Domperidone also caused an increase of serum aldosterone levels. Our results suggest that a dopaminergic mechanism is acting during the cold pressor test and during aldosterone secretion.  相似文献   
6.
A dysregulated response of the neuroimmune system is a main contributor to the progression of neurodegeneration in Parkinson’s disease (PD). Recent findings suggest that protracted activating stimuli including α-synuclein, drive microglia to acquire maladaptive functions and to assume a harmful phenotype that prevail over a restorative one. Based on this concept, disease-modifying drugs should be aimed at targeting suppression of harmful-activated microglia and the associated production of neurotoxic molecules as pro-inflammatory cytokines, while sparing or inducing beneficial-activated microglia. In this study, we review current evidence in support of the beneficial effect of targeting peroxisome-proliferator-activated receptor (PPAR)-γ to achieve neuroprotection in PD. PPAR-γ agonists as rosiglitazone and pioglitazone are currently gaining increasing attention as promising disease-modifying drugs in this disorder. Early in vitro studies, followed by studies in in vivo models of PD, have provided convincing evidence that these drugs inhibit neuronal degeneration likely by selectively targeting the expression of neurotoxic factors in reactive microglia. Potential therapeutic application has been corroborated by recent report of pioglitazone neuroprotective activity in a non-human primate model of PD. All together, preclinical evidence have prompted the translation of pioglitazone to a phase II clinical trial in early PD.  相似文献   
7.
8.
9.
10.
Clinical Rheumatology - We aimed to evaluate the (a) potential predictors of first biological disease-modifying anti-rheumatic drug (bDMARD) failure and (b) factors associated with failure of...  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