全文获取类型
收费全文 | 2025篇 |
免费 | 151篇 |
国内免费 | 34篇 |
专业分类
耳鼻咽喉 | 36篇 |
儿科学 | 64篇 |
妇产科学 | 25篇 |
基础医学 | 272篇 |
口腔科学 | 28篇 |
临床医学 | 140篇 |
内科学 | 629篇 |
皮肤病学 | 24篇 |
神经病学 | 131篇 |
特种医学 | 58篇 |
外科学 | 318篇 |
综合类 | 1篇 |
预防医学 | 61篇 |
眼科学 | 29篇 |
药学 | 121篇 |
肿瘤学 | 273篇 |
出版年
2024年 | 2篇 |
2023年 | 58篇 |
2022年 | 113篇 |
2021年 | 180篇 |
2020年 | 83篇 |
2019年 | 98篇 |
2018年 | 129篇 |
2017年 | 77篇 |
2016年 | 98篇 |
2015年 | 76篇 |
2014年 | 96篇 |
2013年 | 122篇 |
2012年 | 160篇 |
2011年 | 145篇 |
2010年 | 84篇 |
2009年 | 50篇 |
2008年 | 122篇 |
2007年 | 111篇 |
2006年 | 79篇 |
2005年 | 80篇 |
2004年 | 56篇 |
2003年 | 60篇 |
2002年 | 37篇 |
2001年 | 4篇 |
2000年 | 3篇 |
1999年 | 9篇 |
1998年 | 9篇 |
1997年 | 8篇 |
1996年 | 6篇 |
1995年 | 10篇 |
1994年 | 4篇 |
1993年 | 7篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1988年 | 2篇 |
1986年 | 2篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 3篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1977年 | 3篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1969年 | 1篇 |
1967年 | 1篇 |
1932年 | 1篇 |
排序方式: 共有2210条查询结果,搜索用时 0 毫秒
81.
Toshito Nakagawa Stephen Fowler Kenji Takanashi Kuresh Youdim Tsuyoshi Yamauchi Kosuke Kawashima 《Xenobiotica; the fate of foreign compounds in biological systems》2018,48(6):546-554
1.?The in vitro metabolism of alectinib, a potent and highly selective oral anaplastic lymphoma kinase inhibitor, was investigated.2.?The main metabolite (M4) in primary human hepatocytes was identified, which is produced by deethylation at the morpholine ring. Three minor metabolites (M6, M1a, and M1b) were also identified, and a minor peak of hydroxylated alectinib (M5) was detected as a possible precursor of M4, M1a, and M1b.3.?M4, an important active major metabolite, was produced and further metabolized to M6 by CYP3A, indicating that CYP3A enzymes were the principal contributors to this route. M5 is possibly produced by CYP3A and other isoforms as the primary step in metabolism, followed by oxidation to M4 mainly by CYP3A. Alternatively, M5 could be oxidized to M1a and M1b via an NAD-dependent process. None of the non-CYP3A-mediated metabolism appeared to be major.4.?In conclusion, this study suggests that involvement of multiple enzymes in the metabolism of alectinib reduces its potential for drug–drug interactions. 相似文献
82.
Kasirawat Sawangrat Masaki Morishita Kosuke Kusamori Hidemasa Katsumi Toshiyasu Sakane Akira Yamamoto 《Journal of pharmaceutical sciences》2018,107(11):2946-2956
Breast cancer resistance protein (BCRP) transporter is an efflux transporter that utilizes energy from adenosine triphosphate hydrolysis to push its substrates, regardless of the concentration gradient. Its presence on the apical membrane of the intestinal mucosa is a major obstacle for the intestinal absorption of its substrates. In this study, we examined the effects of various pharmaceutical excipients on the intestinal transport and absorption of sulfasalazine, a BCRP substrate. Four excipients, including 0.05% and 0.075% BL-9EX, 0.01% and 0.05% Brij 97, 0.075% Labrasol, and 0.05% and 0.1% Tween 20 decreased the secretory transport of sulfasalazine in an in vitro diffusion chamber. Further investigation in an in situ closed loop experiment in rats showed that 0.05% and 0.1% BL-9EX and 0.1% Brij 97 effectively enhanced the intestinal absorption of sulfasalazine while maintaining minimal toxicity to the intestinal mucosa. However, 0.1% Brij 97 also increased the intestinal absorption of 5(6)-carboxyfluorescein, a paracellular marker compound. These findings suggest that BL-9EX might effectively inhibit the BCRP-mediated efflux of sulfasalazine in vivo, indicating that BL-9EX could improve the intestinal absorption of sulfasalazine and other BCRP substrates. 相似文献
83.
Kazuyoshi Takagi MD Hiroyuki Otsuka MD Tohru Takaseya MD Takahiro Shojima MD Yusuke Shintani MD Yasuyuki Zaima MD Kosuke Saku MD Tomofumi Fukuda MD Atsunobu Ouryouji MD Koichi Arinaga MD Hiroyuki Tanaka MD 《Journal of cardiac surgery》2020,35(1):246-249
We report an 83-year-old man with a mycotic left ventricular apical pseudoaneurysm and aortic prosthetic valve endocarditis caused by Enterococcus spp. Mycotic left ventricular pseudoaneurysm is very rare and is associated with a high risk of rupture. Here, we report the clinical presentation, diagnosis, prognosis, and treatment of a case of mycotic left ventricular pseudoaneurysm to raise awareness regarding this unusual and potentially fatal complication. 相似文献
84.
Aki Endo Yukiko Imai Mizuho Nakamura Eri Yanagisawa Takaaki Taguchi Kosuke Torii Hidenobu Okumura Koji Ichinose 《Journal of natural medicines》2014,68(2):442-447
Garlic (Allium sativum L.) has been used worldwide as a food and for medicinal purposes since early times. Garlic cultivars exhibit considerable morphological diversity despite the fact that they are mostly sterile and are grown only by vegetative propagation of cloves. Considerable recombination occurs in garlic genomes, including the genes involved in secondary metabolites. We examined the genomic DNAs (gDNAs) from garlic, encoding alliinase, a key enzyme involved in organosulfur metabolism in Allium plants. The 1.7-kb gDNA fragments, covering three exons (2, 3, and 4) and all four introns, were amplified from total DNAs prepared from garlic samples produced in Asia and Europe, leading to 73 sequences in total: Japan (JPN), China (CHN), India (IND), Spain (ESP), and France (FRA). The exon sequences were highly conserved among all the sequences, probably reflecting the fully functional alliinase associated with the flavor quality. Distinct intraspecific variations were detected for all four intron sequences, leading to the haplotype classifications. A close relationship between JPN and CHN was observed for all four introns, whereas IND showed a more divergent distribution. ESP and FRA afforded clearly different variants compared with those from Asian sequences. The present study provides information that could be useful in the development of an additional molecular marker for garlic authentication and quality control. 相似文献
85.
86.
Kosuke Endo Taku Iida Shintaro Yagi Atsushi Yoshizawa Yasuhiro Fujimoto Kohei Ogawa Yasuhiro Ogura Akira Mori Toshimi Kaido Shinji Uemoto 《Surgery today》2014,44(12):2293-2299
Purpose
Uncontrollable hepatic hydrothorax and massive ascites (H&MA) requiring preoperative drainage are sometimes encountered in liver transplantation (LT). We retrospectively analyzed the characteristics of such patients and the impact of H&MA on the postoperative course.Methods
We evaluated 237 adult patients who underwent LT in our institute between April 2006 and October 2010.Results
Recipients with uncontrollable H&MA (group HA: n = 36) had more intraoperative bleeding, higher Child–Pugh scores, lower serum albumin concentrations and higher blood urea nitrogen concentrations than those without uncontrollable H&MA (group C: n = 201). They were also more likely to have preoperative hepatorenal syndrome and infections. The incidence of postoperative bacteremia was higher (55.6 vs. 46.7 %, P = 0.008) and the 1- and 3-year survival rates were lower (1 year: 58.9 vs. 82.9 %; 3 years: 58.9 vs. 77.7 %; P = 0.003) in group HA than in group C. The multivariate proportional regression analyses revealed that uncontrollable H&MA and the Child–Pugh score were independent risk factors for the postoperative prognosis.Conclusions
Postoperative infection control may be an important means of improving the outcome for patients with uncontrollable H&MA undergoing LT, and clinicians should strive to perform surgery before H&MA becomes uncontrollable. 相似文献87.
Tomohide Hori Shintaro Yagi Yusuke Okamua Taku Iida Kohei Ogawa Hirokazu Tanaka Shoichi Kageyama Hirofumi Hirao Toshiyuki Hata Izumi Kirino Kazuyuki Nagai Toyonari Kubora Kanta Jobara Kosuke Endo Shinji Uemoto 《Surgery today》2014,44(11):2201-2207
An insufficient remnant in extended hepatectomy and small-for-size graft in liver transplantation are critical matters in the field of liver surgery, and reliable and reproducible animal models that can provide clinically relevant and reliable data are needed. We herein describe our detailed surgical procedures for performing 70 % hepatectomy in pigs, and discuss the critical anatomical features, key techniques and pitfalls based on our experience. The porcine liver is divided into four lobes. The right lateral lobe (RLL) accounts for 30 % of the liver volume. Important points, such as selective temporal clamping of the arterial branch, confirmation of a related demarcation line, a two-step process to skeletonize Glisson’s capsules during liver resection and selective ligation of the portal venous branch to the right medial lobe without inducing any subtle injuries to Glisson’s capsules from the RLL to common bile duct, are discussed. 相似文献
88.
Inoue Takahiro Ishihara Ryu Shibata Tomotaka Suzuki Kosuke Kitagawa Yuko Miyazaki Tatsuya Yamaji Taiki Nemoto Kenji Oyama Tsuneo Muto Manabu Takeuchi Hiroya Toh Yasushi Matsubara Hisahiro Mano Masayuki Kono Koji Kato Ken Yoshida Masahiro Kawakubo Hirofumi Booka Eisuke Yamatsuji Tomoki Kato Hiroyuki Ito Yoshinori Ishikawa Hitoshi Tsushima Takahiro Kawachi Hiroshi Oyama Takashi Kojima Takashi Kuribayashi Shiko Makino Tomoki Matsuda Satoru Doki Yuichiro 《Esophagus》2022,19(3):375-383
Esophagus - Endoscopic diagnosis of the invasion depth of superficial esophageal squamous cell carcinoma (ESCC) is an important determinant of the treatment strategy. The three endoscopic imaging... 相似文献
89.
Shigeru Tanaka Toshiaki Nakano Hiroto Hiyamuta Masatomo Taniguchi Masanori Tokumoto Kosuke Masutani Hiroaki Ooboshi Kazuhiko Tsuruya Takanari Kitazono 《Journal of atherosclerosis and thrombosis》2021,28(4):385
Aim: Multivascular disease, indicating concurrent arteriosclerotic lesions in a number of different vascular beds, is an independent risk factor for recurrent ischemic events in the general population. However, the impact of multivascular disease on the risk of developing cardiovascular disease has not been fully evaluated in patients receiving hemodialysis.Methods: A total of 3,504 hemodialysis patients were prospectively followed for 10 years. In this study, multivascular disease was defined as the coexistence of coronary artery disease and stroke. We examined the relationship between multivascular disease and the occurrence of composite cardiovascular endpoint, consisting of cardiovascular death, nonfatal coronary artery disease, nonfatal stroke, and peripheral artery disease.Results: The proportion of participants with multivascular disease was 5.7% (n = 200) at baseline. During follow-up (median, 106.6 months; interquartile range, 50.1–121.8 months), 1,311 patients experienced the composite endpoint, which was defined as at least one of the following: cardiovascular death (n = 620), nonfatal coronary artery disease (n = 318), nonfatal stroke (n = 340), and peripheral artery disease (n = 257). Compared with the group with no history of cardiovascular disease, the risk of experiencing the composite endpoint increased significantly with higher numbers of injured vascular beds in patients with single vascular disease (hazard ratio, 1.68; 95% confidence interval, 1.49–1.89) and in those with multivascular disease (hazard ratio, 2.11; 95% confidence interval, 1.71–2.60). In a multivariable analysis, multivascular disease was an independent predictor of cardiovascular events, in addition to diabetes, aging, and hypertension.Conclusions: This study clearly demonstrated that multivascular disease was a powerful predictor for cardiovascular mortality and morbidity in patients receiving hemodialysis. 相似文献
90.