全文获取类型
收费全文 | 11139篇 |
免费 | 598篇 |
国内免费 | 45篇 |
专业分类
耳鼻咽喉 | 105篇 |
儿科学 | 209篇 |
妇产科学 | 141篇 |
基础医学 | 1284篇 |
口腔科学 | 324篇 |
临床医学 | 844篇 |
内科学 | 2898篇 |
皮肤病学 | 126篇 |
神经病学 | 852篇 |
特种医学 | 519篇 |
外国民族医学 | 1篇 |
外科学 | 2219篇 |
综合类 | 52篇 |
一般理论 | 1篇 |
预防医学 | 302篇 |
眼科学 | 242篇 |
药学 | 653篇 |
中国医学 | 11篇 |
肿瘤学 | 999篇 |
出版年
2023年 | 133篇 |
2022年 | 227篇 |
2021年 | 400篇 |
2020年 | 197篇 |
2019年 | 245篇 |
2018年 | 281篇 |
2017年 | 220篇 |
2016年 | 254篇 |
2015年 | 251篇 |
2014年 | 300篇 |
2013年 | 369篇 |
2012年 | 609篇 |
2011年 | 643篇 |
2010年 | 341篇 |
2009年 | 262篇 |
2008年 | 495篇 |
2007年 | 462篇 |
2006年 | 455篇 |
2005年 | 459篇 |
2004年 | 401篇 |
2003年 | 407篇 |
2002年 | 419篇 |
2001年 | 255篇 |
2000年 | 268篇 |
1999年 | 248篇 |
1998年 | 108篇 |
1997年 | 92篇 |
1996年 | 71篇 |
1995年 | 78篇 |
1994年 | 77篇 |
1993年 | 55篇 |
1992年 | 217篇 |
1991年 | 231篇 |
1990年 | 214篇 |
1989年 | 198篇 |
1988年 | 180篇 |
1987年 | 187篇 |
1986年 | 155篇 |
1985年 | 154篇 |
1984年 | 128篇 |
1983年 | 113篇 |
1982年 | 59篇 |
1979年 | 82篇 |
1978年 | 58篇 |
1975年 | 62篇 |
1974年 | 53篇 |
1971年 | 53篇 |
1969年 | 53篇 |
1968年 | 55篇 |
1966年 | 55篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Benign schwannoma of the pancreas 总被引:2,自引:0,他引:2
Labile Togba Soumaoro Kenichi Teramoto Tohru Kawamura Noriaki Nakamura Takahiro Sanada Kenichi Sugihara Shigeki Arii 《Journal of gastrointestinal surgery》2005,9(2):288-290
Reported cases of intrapancreatic schwannomas have recently increased in the literature. However, none of these cases were
diagnosed clearly as schwannoma preoperatively. We herein describe the clinicopathologic findings of a solitary benign schwannoma
occurring in the head of the pancreas. Additionally, the differential diagnosis versus other cystic- and solid-appearing pancreatic
masses is briefly discussed. 相似文献
12.
13.
Hidero Minami Ryo Matsutani Atsushi Mizokami Mikio Namiki 《International journal of urology》2007,14(4):368-369
Abstract: A 19-year-old woman presented at our hospital with acute urinary retention in September 2005. She had experienced the same chief complaint twice previously. She had used non-steroidal anti-inflammatory drugs before acute urinary retention. The results of physical examinations were unremarkable, and her neurologic signs were not remarkable. The basic laboratory test values were all normal and a psychiatric assessment indicated that her symptoms were not psychogenic. Magnetic resonance imaging was carried out, but revealed only a slight bulging in the L3/L4/L5 disk. Water cystometry showed acontractile detrusor. We made a diagnosis of acute urinary retention as a result of non-steroidal anti-inflammatory drugs because of her use of such drugs before the development of symptoms on multiple occasions. This patient was regularly followed up as an outpatient, and she could void smoothly in February 2006. This is the first report which acute urinary retention associated with non-steroidal anti-inflammatory drugs in Japan. 相似文献
14.
Katsuyoshi Habiro Hiroaki Shimmura Sakiko Kobayashi Motoko Kotani Yasuo Ishida Kazunari Tanabe Hiroshi Toma Ryo Abe 《American journal of transplantation》2005,5(4):702-711
Previously, we reported that allogeneic skin grafts were rapidly rejected by CD28 and CD40 ligand double deficient mice mediated by CD8+ T cells. These results indicated that some elements in addition to CD28- and CD40-mediated costimulation provide stimulatory signals for the activation of donor-specific CD8+ T cells. In this report, we investigated the role of inflammation associated with transplantation on costimulation-independent priming of CD8+ T cell during graft rejection. B6 RAG1 KO mice were transplanted with BALB/c-skin and adoptively transferred with syngeneic CD8+ T cells the same day or 50 days after transplantation. When blockade of CD28- and CD40-mediated costimulation failed to prevent acute rejection of freshly transplanted skin grafts, it efficiently delayed rejection of well-healed skin grafts. These results showed that factors associated with transplantation have essential roles in inducing costimulation blockade-resistant allograft rejection. Costimulation blockade failed to prevent acute graft-infiltration of NK cells and increasing expression of intragraft IL-12 and IL-15. These factors may trigger the graft-infiltration and priming of CD8+ T cells to induce costimulation blockade-resistant allograft rejection. 相似文献
15.
16.
17.
Yukihiko Yamaguchi Masahide Kawano Ryo Tatsukawa 《Archives of environmental contamination and toxicology》1988,17(6):807-812
Tissue distribution and excretion of hexabromobenzene (HBB) and some metabolites were studied in male Wistar rats administered a single oral dosage of HBB.Most of the HBB dosage was absorbed by the intestinal tract and it was rapidly metabolized and distributed throughout the body as the debrominated metabolites, pentabromobenzene (PeBB), tetrabromobenzene (TeBB) and tribromobenzene (TrBB). The time courses of HBB, PeBB and TeBB concentrations in the tissues were roughly classified into several types, and debromination of HBB was found to take place stepwise.The reductive debromination of HBB occurs by metabolic enzymes in the liver rather than microbes in the intestine. 相似文献
18.
Ryo Suzuki M.D. Shunsaku Kobayashi 《Documenta ophthalmologica. Advances in ophthalmology》1988,70(4):293-300
Using tension-recording methods, we compared the effects of acetylcholine (Ach) and carbachol on the bovine iris sphincter. The isolated muscle strips were mounted in a 0.2 ml organ bath, through which Krebs solution at 36 °C flowed continuously. There was a tenthousandfold difference in potency between carbachol and Ach in this tissue. Neostigmine or eserine, acetylcholinesterase (AchE) inhibitors, produced a larger contraction of the muscle than did Ach. Ach-induced contractions were potentiated by low doses of anti-AchEs and were inhibited by atropine.This in vitro study suggests that Ach and/or endogenous chemical agents may be spontaneously released from tissues and that AchE activities in this tissue strongly inhibit or mask the Ach action, probably in order to protect the nerve terminals from released Ach. 相似文献
19.
S Nakano S Suzuki H Kinbara Y Maeda M Yanagawa K Tajima H Tochigi J Kawamura S Hounoki I Yamamoto 《Hinyokika kiyo. Acta urologica Japonica》1990,36(7):831-835
This is a case report on a patient with double cancer of kidney and urinary bladder. The patient was a 65-year-old female, and she was admitted with the chief complaint of gross hematuria and right flank pain. After careful examinations, she was diagnosed with right nonfunctioning kidney caused by invasive bladder cancer. Computerized tomography incidentally revealed a mass in the upper pole of the left kidney. Selective left renal arteriography showed stretched arteries and irregularity and tortuosity of the smaller vessels. She was diagnosed with double cancer of bladder and left kidney. Owing to the damage of the right renal function, left partial nephrectomy, total cystectomy, right nephroureterectomy and left ureterocutaneostomy were performed. According to DMSA scintigraphy measured 15 days later, the uptake value of the left kidney was 13.25%, compared to the preoperative value of 25.62%. To date, this case is 36th reported case in Japan. 相似文献
20.