全文获取类型
收费全文 | 601篇 |
免费 | 21篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 60篇 |
妇产科学 | 9篇 |
基础医学 | 57篇 |
口腔科学 | 3篇 |
临床医学 | 47篇 |
内科学 | 194篇 |
皮肤病学 | 21篇 |
神经病学 | 37篇 |
外科学 | 95篇 |
综合类 | 1篇 |
预防医学 | 9篇 |
药学 | 42篇 |
中国医学 | 1篇 |
肿瘤学 | 42篇 |
出版年
2022年 | 4篇 |
2021年 | 4篇 |
2017年 | 3篇 |
2016年 | 5篇 |
2015年 | 9篇 |
2014年 | 11篇 |
2013年 | 6篇 |
2012年 | 8篇 |
2011年 | 7篇 |
2010年 | 8篇 |
2009年 | 15篇 |
2008年 | 3篇 |
2007年 | 14篇 |
2006年 | 32篇 |
2005年 | 20篇 |
2004年 | 11篇 |
2003年 | 18篇 |
2002年 | 8篇 |
2001年 | 6篇 |
2000年 | 4篇 |
1999年 | 13篇 |
1998年 | 33篇 |
1997年 | 41篇 |
1996年 | 31篇 |
1995年 | 31篇 |
1994年 | 38篇 |
1993年 | 15篇 |
1992年 | 7篇 |
1991年 | 12篇 |
1990年 | 9篇 |
1989年 | 9篇 |
1988年 | 4篇 |
1987年 | 2篇 |
1986年 | 6篇 |
1985年 | 5篇 |
1984年 | 4篇 |
1982年 | 2篇 |
1981年 | 7篇 |
1980年 | 4篇 |
1979年 | 5篇 |
1978年 | 4篇 |
1970年 | 2篇 |
1966年 | 3篇 |
1959年 | 8篇 |
1958年 | 33篇 |
1957年 | 22篇 |
1956年 | 21篇 |
1955年 | 19篇 |
1954年 | 25篇 |
1948年 | 2篇 |
排序方式: 共有624条查询结果,搜索用时 0 毫秒
621.
TOSHIYA HARA IKUKO WADA SUSUMU KAJIHARA TOSHIHIKO MIZUTA KYOSUKE YAMAMOTO TAKAHIRO SAKAI 《Journal of gastroenterology and hepatology》1998,13(6):620-623
We report a case of jejunal leiomyosarcoma with liver metastases in a 52-year-old Japanese male. An echogram demonstrated multiple cystic liver masses in April 1991. The diagnosis of metastatic leiomyosarcoma was made on the basis of characteristic hepatic angiography images and liver biopsy findings. The jejunal leiomyosarcoma was resected and unresectable liver metastatic foci were treated repeatedly with transcathetel arterial embolization. Transcathetel arterial embolization was considered to be effective in this case as the patient survived 4 years and 9 months after the first treatment. 相似文献
622.
TAKASHI ASHIHARA M.D. TAKENORI YAO M.D. TSUNETOYO NAMBA M.D. Ph .D. MAKOTO ITO M.D. Ph .D. TAKANORI IKEDA M.D. Ph .D. AYAKA KAWASE M.D. SUNAO TODA M.D. TORU SUZUKI MASASHI INAGAKI M.D. MASARU SUGIMACHI M.D. Ph .D. MASAHIKO KINOSHITA M.D. Ph .D. KAZUO NAKAZAWA Ph .D. 《Journal of cardiovascular electrophysiology》2001,12(12):1393-1403
INTRODUCTION: It is known that high-strength shock disrupts the lipid matrix of the myocardial cell membrane and forms reversible aqueous pores across the membrane. This process is known as "electroporation." However, it remains unclear whether electroporation contributes to the mechanism of ventricular defibrillation. The aim of this computer simulation study was to examine the possible role of electroporation in the success of defibrillation shock. METHODS AND RESULTS: Using a modified Luo-Rudy-1 model, we simulated two-dimensional myocardial tissue with a homogeneous bidomain nature and unequal anisotropy ratios. Spiral waves were induced by the S1-S2 method. Next, monophasic defibrillation shocks were delivered externally via two line electrodes. For nonelectroporating tissue, termination of ongoing fibrillation succeeded; however, new spiral waves were initiated, even with high-strength shock (24 V/cm). For electroporating tissue, high-strength shock (24 V/cm) was sufficient to extinguish ongoing fibrillation and did not initiate any new spiral waves. Weak shock (16 to 20 V/cm) also extinguished ongoing fibrillation; however, in contrast to the high-strength shock, new spiral waves were initiated. Success in defibrillation depended on the occurrence of electroporation-mediated anodal-break excitation from the physical anode and the virtual anode. Some excitation wavefronts following electrical shock used a deexcited area with recovered excitability as a pass-through point; therefore, electroporation-mediated anodal-break excitation is necessary to block out the pass-through point, resulting in successful defibrillation. CONCLUSION: The electroporation-mediated anodal-break excitation mechanism may play an important role in electrical defibrillation. 相似文献
623.
AKIRA ITO YOSHIMI SAKAKIBARA LIANG MA KAZUHITO ASANO MITSUYOSHI TAKIGUCHI JUN YASUDA & AKIRA HASHIMOTO 《Parasite immunology》1998,20(3):105-110
Rats experimentally infected with Taenia taeniaeformis were followed-up until 14 weeks post inoculation with eggs (PIE) by hepatic ultrasonographic (US) image and serum antibody response analyses. Parasitic cysts could be imaged as small (2 mm in diameter) anechoic areas with or without a parenthesis-like echogenic small line from two weeks PIE. Immunoblot analysis using antigens from oncospheres (TtO), 30-day-old (TtM-30) and 300-day-old metacestodes (TtM-300) revealed that: (1) these three different developmental stages showed their own unique patterns suggesting the presence of stage-specific antigens; (2) faint IgM antibody responses to some components of TtO and TtM-30 or TtM-300 could be detected from one and two weeks PIE, respectively, and (3) IgG responses to some major components of both TtO and TtM-300, and TtM-30 were easily detected from four and five weeks PIE onwards, respectively. Both TtO and TtM (especially TtM-300) appeared to be highly useful for detection of antibody responses in experimentally infected rats. Due to the easiness in preparation of antigens, fully developed metacestodes may be the best candidate antigens for serodiagnosis. These results strongly suggest that both US image and antibody analyses using antigens from fully developed metacestodes are useful for detection of the early stage of cysticercosis in laboratory animal model . 相似文献
624.
Left Axillary Pacemaker Generator Implantation with a Direct Puncture of the Left Axillary Vein 下载免费PDF全文
MAHITO NORO M.D. Ph.D. XIN ZHU Ph.D. TAKAHITO TAKAGI M.D. NAOHIKO SAHARA M.D. YURIKO NARABAYASHI M.D. HIKARI HASHIMOTO M.D. NAOSHI ITO M.D. YOSHINARI ENOMOTO M.D. KEIJIROU NAKAMURA M.D. Ph.D. SHINGO KUJIME M.D. TUYOSHI SAKAI M.D Ph.D. TAKAO SAKATA M.D. Ph.D. KAORU SUGI M.D. Ph.D. 《Pacing and clinical electrophysiology : PACE》2015,38(1):35-41