全文获取类型
收费全文 | 2699篇 |
免费 | 158篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 30篇 |
儿科学 | 58篇 |
妇产科学 | 17篇 |
基础医学 | 325篇 |
口腔科学 | 39篇 |
临床医学 | 173篇 |
内科学 | 775篇 |
皮肤病学 | 53篇 |
神经病学 | 205篇 |
特种医学 | 165篇 |
外科学 | 486篇 |
综合类 | 22篇 |
预防医学 | 78篇 |
眼科学 | 14篇 |
药学 | 126篇 |
中国医学 | 18篇 |
肿瘤学 | 297篇 |
出版年
2024年 | 3篇 |
2023年 | 16篇 |
2022年 | 68篇 |
2021年 | 84篇 |
2020年 | 61篇 |
2019年 | 82篇 |
2018年 | 92篇 |
2017年 | 68篇 |
2016年 | 68篇 |
2015年 | 67篇 |
2014年 | 109篇 |
2013年 | 132篇 |
2012年 | 202篇 |
2011年 | 218篇 |
2010年 | 146篇 |
2009年 | 116篇 |
2008年 | 168篇 |
2007年 | 186篇 |
2006年 | 183篇 |
2005年 | 160篇 |
2004年 | 129篇 |
2003年 | 155篇 |
2002年 | 128篇 |
2001年 | 18篇 |
2000年 | 18篇 |
1999年 | 18篇 |
1998年 | 22篇 |
1997年 | 28篇 |
1996年 | 15篇 |
1995年 | 22篇 |
1994年 | 14篇 |
1993年 | 12篇 |
1992年 | 9篇 |
1991年 | 5篇 |
1990年 | 3篇 |
1989年 | 6篇 |
1985年 | 2篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1982年 | 2篇 |
1981年 | 5篇 |
1980年 | 5篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1976年 | 3篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1968年 | 2篇 |
1963年 | 2篇 |
1929年 | 2篇 |
排序方式: 共有2881条查询结果,搜索用时 15 毫秒
81.
82.
Seishi Aihara Shunsuke Yamada Satoru Shichijo Kento Fukumitsu Mika Kondo Yutaro Hirashima Hideaki Oka Taro Kamimura Atsumi Harada Toshiaki Nakano Kazuhiko Tsuruya Takanari Kitazono 《Therapeutic apheresis and dialysis : official peer-reviewed journal of the International Society for Apheresis, the Japanese Society for Apheresis, the Japanese Society for Dialysis Therapy》2020,24(1):34-41
Vascular access intervention therapy (VAIVT) is necessary to maintain vascular access in patients undergoing hemodialysis. VAIVT‐associated vasodilatation is painful. However, few reports have focused on effective pain relief at the time of VAIVT. The present study was performed to determine whether lidocaine‐propitocain cream, a eutectic mixture of local anesthetics (EMLA), effectively reduces VAIVT‐associated pain in patients undergoing hemodialysis. This placebo‐controlled, double‐blind, crossover study was conducted in a single center. Among 210 patients who underwent a total of 437 VAIVT procedures from August 2017 to June 2018, 30 patients were randomly allocated to either the EMLA–placebo arm or placebo–EMLA arm at the time of VAIVT. EMLA application significantly reduced the visual analog scale score compared with placebo (47.0 ± 21.1 vs. 68.6 ± 20.7 mm, respectively; P < 0.05). EMLA is a safe and effective treatment for relief of VAIVT‐associated pain in patients undergoing hemodialysis. 相似文献
83.
T Tanosoto T Arima A Tomonaga N Ohata P Svensson 《European journal of oral sciences》2012,120(4):363-367
This study aimed to determine autonomic and jaw-muscle activities, and haemodynamic responses, to acute experimental mental stress in humans. Eleven healthy men (25.2 ± 3.0 years of age) and five healthy women (23.0 ± 3.7 years of age) performed a standardized mental stress task, the Paced Auditory Serial Addition Task (PASAT). Autonomic function, such as heart rate variability (HRV), and haemodynamic changes were recorded simultaneously. The success rate of the PASAT decreased with increased pace and duration. Low-frequency (5.8 ± 1.1 ms(2)) and high-frequency (5.3 ± 0.6 ms(2)) components of HRV decreased during the PASAT (to 5.0 ± 0.9 ms(2) and 4.6 ± 1.1 ms(2), respectively) as an indication of acute stress. Oxygenated haemoglobin in the masseter muscle (14.6 ± 2.2 10(4) units mm(-3)) remained at an elevated level during the PASAT (15.5 ± 2.5 10(4) units mm(-3)), whereas deoxygenated haemoglobin (7.8 ± 2.3 10(4) units mm(-3)) showed a consistent decrease (to 6.8 ± 2.1 10(4) units mm(-3)). Total haemoglobin and jaw-muscle electromyographic (EMG) activity did not change during the PASAT. Thus, PASAT-induced mental stress changed the parasympathetic/sympathetic balance of the heart and had an acute influence on jaw-muscle haemodynamics, but not on jaw-muscle EMG activity. This non-invasive experimental set-up can be applied to study the effects of repeated or longer-lasting mental stress in order to further the understanding of pathophysiological mechanisms in craniofacial pain conditions. 相似文献
84.
Porphyromonas gingivalis FimA fimbriae have been classified into 6 genotypes (types I-V and Ib) based on the diversity of the fimA genes encoding the fimbrial subunits. We investigated the prevalence of fimA genotype in Japanese children. Dental plaque specimens were obtained from 400 subjects (age; 2 to 15 years), including 134 with healthy gingiva, 239 with gingivitis and 27 with periodontitis, and then analyzed by polymerase chain reaction. P. gingivalis was detected in 1.5%, 10.0% and 29.6% of these subjects, respectively. Significant differences were observed with regard to P. gingivalis infection among the groups [chi-squared analysis: gingivitis vs. healthy, P < 0.01, odds ratio (OR) = 7.4; periodontitis vs. healthy, P < 0.001, OR = 27.8]. In P. gingivalis-positive subjects with periodontitis, the most prevalent fimA types were type Ib/type II combination (37.5%) and type IV (37.5%), followed by type II (25.0%), while type IV (33.3%) and type II (29.2%) were most often detected in those with gingivitis. Our results suggest that the presence of P. gingivalis is associated with periodontal diseases, and that the type II, IV and Ib/II combination are the most common among fimA genotypes. 相似文献
85.
86.
87.
88.
89.
Hideya Kamei Satohiro Masuda Taro Nakamura Yasuhiro Fujimoto Fumitaka Oike Yasuhiro Ogura Yasutsugu Takada Nobuyuki Hamajima 《Transplant immunology》2013,28(1):14-17
It has previously been demonstrated that glutathione S-transferase T1 (GSTT1) genetic mismatch between recipient and donor is a risk factor for developing immune-mediated hepatitis following liver transplantation and for antibody-mediated rejection in renal transplantation. Little is known whether the GSTT1 gene polymorphism affects the incidence of acute cellular rejection (ACR) following living donor liver transplantation (LDLT). Patients underwent LDLT at Nagoya University or Kyoto University, Japan, between 2004 and 2009. Genotyping of GSTT1 genes (null or present genotype) was conducted in recipients and donors. A total of 155 LDLT cases were examined. Forty-seven recipients (30.3%) developed early ACR. There was no association of recipient GSTT1 genotype with ACR incidence. However, ACR incidence was significantly higher in recipients transplanted from GSTT1 present genotype donors than in those transplanted from GSTT1 null genotype donors [odds ratio (OR) = 2.64, 95% confidence interval (CI) = 1.12–5.83, p = 0.016]. Moreover, GSTT1 recipient/donor genotype mismatch (present/null or null/present) was significantly associated with ACR development (OR = 2.28, 95% CI = 1.12–4.61, p = 0.022). The genotyping of GSTT1 in recipients and donors might be useful to stratify the liver transplant recipients according to risk of ACR. 相似文献