全文获取类型
收费全文 | 5970篇 |
免费 | 490篇 |
国内免费 | 39篇 |
专业分类
耳鼻咽喉 | 54篇 |
儿科学 | 285篇 |
妇产科学 | 115篇 |
基础医学 | 783篇 |
口腔科学 | 126篇 |
临床医学 | 518篇 |
内科学 | 1324篇 |
皮肤病学 | 208篇 |
神经病学 | 452篇 |
特种医学 | 563篇 |
外科学 | 865篇 |
综合类 | 45篇 |
预防医学 | 439篇 |
眼科学 | 73篇 |
药学 | 306篇 |
中国医学 | 8篇 |
肿瘤学 | 335篇 |
出版年
2023年 | 36篇 |
2022年 | 48篇 |
2021年 | 137篇 |
2020年 | 77篇 |
2019年 | 127篇 |
2018年 | 158篇 |
2017年 | 108篇 |
2016年 | 117篇 |
2015年 | 138篇 |
2014年 | 189篇 |
2013年 | 248篇 |
2012年 | 291篇 |
2011年 | 287篇 |
2010年 | 209篇 |
2009年 | 190篇 |
2008年 | 234篇 |
2007年 | 236篇 |
2006年 | 224篇 |
2005年 | 232篇 |
2004年 | 194篇 |
2003年 | 200篇 |
2002年 | 182篇 |
2001年 | 147篇 |
2000年 | 152篇 |
1999年 | 133篇 |
1998年 | 178篇 |
1997年 | 155篇 |
1996年 | 153篇 |
1995年 | 120篇 |
1994年 | 114篇 |
1993年 | 110篇 |
1992年 | 101篇 |
1991年 | 110篇 |
1990年 | 90篇 |
1989年 | 126篇 |
1988年 | 110篇 |
1987年 | 114篇 |
1986年 | 99篇 |
1985年 | 101篇 |
1984年 | 63篇 |
1983年 | 63篇 |
1982年 | 53篇 |
1981年 | 41篇 |
1980年 | 46篇 |
1979年 | 36篇 |
1978年 | 32篇 |
1977年 | 33篇 |
1976年 | 35篇 |
1975年 | 37篇 |
1972年 | 17篇 |
排序方式: 共有6499条查询结果,搜索用时 328 毫秒
1.
2.
3.
4.
5.
JA HYEON KU CHEOL KWAK SEUNG-JUNE OH EUNSIK LEE SANG EUN LEE JAE-SEUNG PAICK 《International journal of urology》2004,11(7):489-493
BACKGROUND: Our aims in the present study were to estimate the influences of pain and urinary symptoms on quality of life, and to determine which of these two variables has the most predictive power with respect to quality of life in young men with chronic prostatitis-like symptoms. METHODS: Chronic prostatitis-like symptoms were measured by the National Institutes of Health-Chronic Prostatitis Symptom Index. Of the 28,841 men aged 20 years who lived in the study community, 18,495 men (a response rate 64.1%) agreed to participate in the study. A total of 1057 men who complained of symptoms indicative of chronic prostatitis were included in the study. The influences of pain and urinary symptoms on quality of life were determined using logistic regression analysis. The receiver operating characteristic (ROC) curve was used to estimate the predictive ability of each of these variables with respect to quality of life. RESULTS: Results from multivariate analysis showed that both pain and urinary symptoms were associated with an increased likelihood of impaired quality of life, although pain contributed more to a reduced quality of life than urinary symptoms. Relative to men who experienced mild pain, men who experienced moderate pain had a 3.9-fold risk of poor quality of life (odds ratio [OR], 3.87; 95% confidence interval [CI], 2.86-5.23; P < 0.001) and those who experienced severe pain had a 15.7-fold risk of reduced quality of life (OR, 15.68; 95% CI, 6.59-37.35; P < 0.001). Moderate urinary symptoms were associated with a 1.4-fold risk of bother (OR, 1.41; 95% CI, 1.01-1.99; P < 0.001) and severe urinary symptoms were associated with 2.4-fold risk (OR, 2.39; 95% CI, 1.37-4.12; P < 0.001), relative to mild urinary symptoms. Comparison of the effects of pain and urinary symptoms showed that pain severity had the most predictive power for bother, quality of life, and quality-of-life impact. The areas under the ROC curves for bother, quality of life, and quality-of-life impact were 71.3%, 69.3% and 72.5%, respectively. CONCLUSION: Urinary symptoms and pain might be associated with an increased likelihood of impaired quality of life in young men with chronic prostatitis-like symptoms. In addition, our findings suggest that pain severity is the most influential variable for determining quality of life in this population. 相似文献
6.
7.
The effects of sulfated cholecystokinin (CCK-8S) and glucose on insulin secretion and polyphosphoinositide (PPI) metabolism were studied in isolated rat islets. Both agonists stimulate PPI hydrolysis, inositol phosphate accumulation, 3H efflux from [3H]inositol-prelabeled tissue, and 45Ca efflux from prelabeled cells. However, the effects of CCK-8S on PPI metabolism are considerably greater than those of glucose. Furthermore, the effects of CCK-8S on PPI and Ca2+ metabolism are observed whether islets are incubated in either 2.75 or 7 mM glucose, but CCK-8S only stimulates insulin secretion (a biphasic response) when the higher glucose concentration is present. Addition of 1 microM forskolin to islets incubated in media containing 2.75 mM glucose does not influence basal insulin secretion but sensitizes the islets to the action of CCK-8S. In the presence of forskolin, CCK-8S induces a very marked first phase but no second phase of insulin secretion. We postulate that CCK-8S acts in this tissue via receptor-linked PPI hydrolysis, leading to an inositol trisphosphate-induced Ca2+ efflux. These receptor-mediated effects of CCK-8S are not altered either by the ambient glucose concentration or the cAMP content of the islets, but these two factors determine the responsiveness of the islets (in terms of insulin secretion) to a given CCK-8S signal. 相似文献
8.
E Moreno González I Landa Garcia J Calleja Kempin M Gomez Gutierrez J Arias Diaz D Riano Carrera F Parez Cerda P Moral Gutierrez F Guillen Ramirez I Garcia Garcia 《Der Chirurg》1990,61(10):701-704
Between 4/1986 to 1/1989, 74 orthotopic liver transplantation were performed in 62 patients (62 first liver transplants, 10 as second graft and two as a third graft); 57 in adults and 17 in children. The main indication for the operation was liver cirrhosis (61.4%) (the most frequent etiology was alcoholic cirrhosis, 28.5%). Six cirrhotic patients had a hepatocarcinoma (9.6%). Two received a liver and kidney transplant due to terminal renal insufficiency and hemodialysis. The most frequent indication in children was biliary atresia (33.3%). Six patients had a fulminal liver failure (9.6%). AB0 blood group compatibility was identical in 87.5%, compatible in six and incompatible in three patients. Total orthotopic liver transplantation was performed in 67 patients, and size-reduced liver was indicated in 7 patients. Extracorporeal veno-venous bypass was used in adults but never in children. In 93.1% of the transplants a single hepatic artery was anastomosed to the recipient and in 6.9% a double anastomosis was performed. In 62.5% of the patients a end-to-end choledocho-choledochostomy was performed and in 34.8% hepatico-jejunostomy was indicated. Three months postoperative mortality rate was 12.9%. Arterial stenosis and thrombosis were the most frequent complication. 相似文献
9.
10.