全文获取类型
收费全文 | 5008篇 |
免费 | 275篇 |
国内免费 | 47篇 |
专业分类
耳鼻咽喉 | 14篇 |
儿科学 | 93篇 |
妇产科学 | 58篇 |
基础医学 | 732篇 |
口腔科学 | 113篇 |
临床医学 | 349篇 |
内科学 | 1352篇 |
皮肤病学 | 400篇 |
神经病学 | 238篇 |
特种医学 | 191篇 |
外科学 | 957篇 |
综合类 | 23篇 |
预防医学 | 108篇 |
眼科学 | 36篇 |
药学 | 222篇 |
中国医学 | 13篇 |
肿瘤学 | 431篇 |
出版年
2023年 | 27篇 |
2022年 | 76篇 |
2021年 | 139篇 |
2020年 | 76篇 |
2019年 | 93篇 |
2018年 | 140篇 |
2017年 | 97篇 |
2016年 | 100篇 |
2015年 | 133篇 |
2014年 | 165篇 |
2013年 | 184篇 |
2012年 | 327篇 |
2011年 | 331篇 |
2010年 | 184篇 |
2009年 | 163篇 |
2008年 | 269篇 |
2007年 | 294篇 |
2006年 | 285篇 |
2005年 | 277篇 |
2004年 | 275篇 |
2003年 | 306篇 |
2002年 | 290篇 |
2001年 | 64篇 |
2000年 | 69篇 |
1999年 | 81篇 |
1998年 | 74篇 |
1997年 | 66篇 |
1996年 | 55篇 |
1995年 | 48篇 |
1994年 | 47篇 |
1993年 | 39篇 |
1992年 | 44篇 |
1991年 | 44篇 |
1990年 | 25篇 |
1989年 | 38篇 |
1988年 | 38篇 |
1987年 | 37篇 |
1986年 | 32篇 |
1985年 | 32篇 |
1984年 | 18篇 |
1983年 | 16篇 |
1982年 | 18篇 |
1979年 | 23篇 |
1978年 | 16篇 |
1977年 | 15篇 |
1976年 | 14篇 |
1975年 | 15篇 |
1974年 | 32篇 |
1971年 | 13篇 |
1968年 | 15篇 |
排序方式: 共有5330条查询结果,搜索用时 15 毫秒
111.
Sho Saito Kayoko Hayakawa Shinya Tsuzuki Masahiro Ishikane Maki Nagashima Kazuhisa Mezaki Yuko Sugiki Taichi Tajima Nobuaki Matsunaga Satoshi Ide Noriko Kinoshita Yoshiki Kusama Yumiko Fujitomo Takato Nakamoto Yuta Toda Mitsuo Kaku Eiichi N. Kodama Norio Ohmagari 《Antimicrobial agents and chemotherapy》2021,65(3)
112.
Masaru Ihira Yuki Higashimoto Yoshiki Kawamura Ken Sugata Masahiro Ohashi Yoshizo Asano Tetsushi Yoshikawa 《Journal of virological methods》2013
Rapid differentiation between wild-type varicella zoster virus (VZV) and Oka-vaccine (vOka) strains is important for monitoring side reactions of varicella vaccination. To develop a high-throughput molecular diagnostic method for the differentiation of wild-type VZV and vOka strains based on cycling probe technology. The primers were designed to amplify common sequences spanning a single nucleotide polymorphism (SNP) in gene 62 of VZV. DNA–RNA chimeric probes (cycling probes) were designed to detect the SNP at nucleotide 105705. The cycling probe real-time PCR assays for VZV wild-type and vOka strains specifically amplified plasmids containing target sequences that ranged between 10 and 1 × 106 copies per reaction. The inter- and intra-assay coefficients of variation were less than 5%. After initial validation studies, the clinical reliability of this method was evaluated using 38 swab samples that were collected from patients suspected of being zoster. Compared to the loop mediated isothermal amplification method, which is defined as the gold standard, cycling probe real-time PCR was highly sensitive and specific. The cycling probe real-time PCR technology is a reliable tool for differentiating between wild-type VZV and vOka strains in clinical samples. 相似文献
113.
Domae Keitaro Toda Koichi Yoshioka Daisuke Miyagawa Shigeru Yoshikawa Yasushi Hata Hiroki Kainuma Satoshi Kawamura Takuji Kawamura Ai Sawa Yoshiki 《Journal of artificial organs》2021,24(3):377-381
Journal of Artificial Organs - Infection is a major complication in patients with a left ventricular assist device (LVAD). Once a driveline exit-site infection (DLI) reaches the LVAD component,... 相似文献
114.
Masuda Hirotada Miyagawa Shigeru Sugiura Seiryo Washio Takumi Okada Jun-ichi Ueno Takayoshi Toda Koichi Kuratani Toru Hisada Toshiaki Sawa Yoshiki 《Journal of artificial organs》2021,24(3):351-357
Journal of Artificial Organs - Despite advancements in preoperative prediction of patient outcomes, determination of the most appropriate surgical treatments for patients with severely impaired... 相似文献
115.
Watanabe Takuji Ueno Takayoshi Tominaga Yuji Araki Kanta Kanaya Tomomitsu Taira Masaki Toda Koichi Kuratani Toru Sawa Yoshiki 《Journal of artificial organs》2021,24(2):258-260
Journal of Artificial Organs - A 45-year-old woman with repaired complex congenital heart disease, who underwent placement of Jarvik 2000, a ventricular assist device (VAD) for 4 years,... 相似文献
116.
Yoshifumi Noda Nobuyuki Kawai Takuma Ishihara Yoshiki Tsuboi Tetsuro Kaga Toshiharu Miyoshi Fuminori Hyodo Masayuki Matsuo 《The British journal of radiology》2021,94(1122)
Objectives:To determine the optimal scan delay corresponding to individual hemodynamic status for pancreatic parenchymal phase in dynamic contrast-enhanced CT of the abdomen.Methods:One hundred and fourteen patients were included in this retrospective study (69 males and 45 females; mean age, 67.9 ± 12.1 years; range, 39–87 years). These patients underwent abdominal dynamic contrast-enhanced CT between November 2019 and May 2020. We calculated and recorded the time from contrast material injection to the bolus-tracking trigger of 100 Hounsfield unit (HU) at the abdominal aorta (s) (TimeTRIG) and scan delay from the bolus-tracking trigger to the initiation of pancreatic parenchymal phase scanning (s) (TimeSD). The scan delay ratio (SDR) was defined by dividing the TimeSD by TimeTRIG. Non-linear regression analysis was conducted to assess the association between CT number of the pancreas and SDR and to reveal the optimal SDR, which was ≥120 HU in pancreatic parenchyma.Results:The non-linear regression analysis showed a significant association between CT number of the pancreas and the SDR (p < 0.001). The mean TimeTRIG and TimeSD were 16.1 s and 16.8 s, respectively. The SDR to peak enhancement of the pancreas (123.5 HU) was 1.00. An SDR between 0.89 and 1.18 shows an appropriate enhancement of the pancreas (≥120 HU).Conclusion:The CT number of the pancreas peaked at an SDR of 1.00, which means TimeSD should be approximately the same as TimeTRIG to obtain appropriate pancreatic parenchymal phase images in dynamic contrast-enhanced CT with bolus-tracking method.Advances in knowledge:The hemodynamic state is different in each patient; therefore, scan delay from the bolus-tracking trigger should also vary based on the time from contrast material injection to the bolus-tracking trigger. This is necessary to obtain appropriate late hepatic arterial or pancreatic parenchymal phase images in dynamic contrast-enhanced CT of the abdomen. 相似文献
117.
Daisuke Yoshioka Koichi Toda Taichi Sakaguchi Shigeru Miyagawa Hiroyuki Nishi Yasushi Yoshikawa Satsuki Fukushima Shunsuke Saito Tetsuya Saito Ikuko Shibasaki Yasushi Sakata Tomohito Ohtani Yoshiki Sawa 《Journal of artificial organs》2013,16(3):386-388
Continuous-flow left ventricular assist devices (LVADs) provide acceptable clinical results, but the long waiting period for heart transplantation leads to diverse complications. LVAD support can cause reverse left ventricular (LV) remodeling that results in the improvement of LV function and allows LVAD removal. We present a case of successful removal of a DuraHeart LVAD because of sufficient recovery of LV function. Before LVAD removal, we conducted an “LVAD weaning test” by decreasing pump speed and performing an additional normal saline infusion test. We consider that the LVAD weaning test can be used in place of the “pulsatile LVAD off test.” 相似文献
118.
Kodesho Taiki Taniguchi Keigo Kato Takuya Mizoguchi Shougo Yamakoshi Yoshiki Watanabe Kota Fujimiya Mineko Katayose Masaki 《Journal of Medical Ultrasonics》2021,48(2):115-121
Journal of Medical Ultrasonics - Estimation of muscle passive force from elasticity using shear wave elastography (SWE) has been reported. However, the relationship between the elasticity and... 相似文献
119.
Apparent diffusion coefficient as a potential surrogate marker for Ki‐67 index in mucinous breast carcinoma 下载免费PDF全文
120.