全文获取类型
收费全文 | 379篇 |
免费 | 32篇 |
国内免费 | 1篇 |
专业分类
儿科学 | 19篇 |
妇产科学 | 8篇 |
基础医学 | 64篇 |
口腔科学 | 10篇 |
临床医学 | 44篇 |
内科学 | 108篇 |
皮肤病学 | 3篇 |
神经病学 | 16篇 |
特种医学 | 10篇 |
外科学 | 32篇 |
综合类 | 5篇 |
预防医学 | 20篇 |
眼科学 | 16篇 |
药学 | 43篇 |
中国医学 | 2篇 |
肿瘤学 | 12篇 |
出版年
2023年 | 3篇 |
2022年 | 7篇 |
2021年 | 8篇 |
2020年 | 13篇 |
2019年 | 12篇 |
2018年 | 12篇 |
2017年 | 10篇 |
2016年 | 11篇 |
2015年 | 15篇 |
2014年 | 28篇 |
2013年 | 25篇 |
2012年 | 40篇 |
2011年 | 31篇 |
2010年 | 12篇 |
2009年 | 8篇 |
2008年 | 27篇 |
2007年 | 17篇 |
2006年 | 13篇 |
2005年 | 17篇 |
2004年 | 11篇 |
2003年 | 14篇 |
2002年 | 11篇 |
2001年 | 5篇 |
2000年 | 3篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 5篇 |
1990年 | 3篇 |
1989年 | 2篇 |
1988年 | 5篇 |
1987年 | 5篇 |
1986年 | 1篇 |
1985年 | 4篇 |
1982年 | 1篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1978年 | 3篇 |
1977年 | 3篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1972年 | 1篇 |
1971年 | 1篇 |
1970年 | 4篇 |
1969年 | 2篇 |
排序方式: 共有412条查询结果,搜索用时 31 毫秒
1.
2.
Dinesh Singhal Nandini Vasdev Arvinder Soin Subash Gupta Samiran Nundy 《Indian journal of gastroenterology》2006,25(4):206-207
It is difficult to distinguish between carcinoid tumors of the pancreatic head and periampullary region and carcinomas preoperatively. Between 1996 and 2002, 125 consecutive pancreaticoduodenectomies done by us for periampullary tumors (14 carcinoids, 111 carcinomas) were analyzed. Patients with carcinoid tumors had significantly younger mean age (48 vs. 54 years), longer history (32 vs. 8 weeks), lower serum total bilirubin levels (1.4 vs. 6.3 mg/dL) and on CT scan, had larger, well-localized tumors (5 cm vs. 2 cm). Their postoperative course was better with no mortality or major morbidity, whereas after resection for carcinoma 7 (6.3%) patients died and 30 (27%) had major postoperative complications. Thus, a tumor of this region in a young patient with indolent history, low bilirubin level and with CT scan depicting a large expansile lesion suggests a carcinoid. Such tumors may be safely resected with low postoperative morbidity and mortality and good long-term prognosis. 相似文献
3.
4.
Angelo Agostoni Bianca Marasini Marco Cicardi Giancarlo Martignoni Lilj Uziel Maurezio Pietrogrande 《Allergy》1978,33(4):216-221
Prophylactic treatment with antifibrinolytic agents, epsilon-aminocapriod and tranexamic acid, reduces the incidence and severits of attacks in patients with hereditary angioedema. Long-term ellectivenessor risk of antifibrinolytic agents has not been established. Sixteen patients needing continuous prophylaxis because of frequency and severity of attacks were treated with tranexamic acid. In four patients this treatment was ineffective and the drug was withdrawn after 2 months. A remission or reduction in the frequency or serverity of attacks was observed in 12 patients treated for a period ranging from 8 to 34 months. Hepatic tests and blood fibrinolytic activity were not influenced by long term oral treatment with tranexamic acid. 相似文献
5.
A Agostoni M Cicardi G C Martignoni L Bergamaschini B Marasini 《The Journal of allergy and clinical immunology》1980,65(1):75-79
Treatment with 17 alpha-methyltestosterone and with some synthetic androgens prevents attacks of hereditary angioedema (HAE). However, the potential hepatotoxicity of 17 alpha-alkylated androgens raises the problem of long-term prophylactic use of these agents. Therefore we compared the efficacy in preventing HAE attacks of 17 alpha-alkylated steroids (danazol and stanozolol) with non-17 alpha-alkylated derivatives (quinbolone, nandrolone decanoate and mesterolone). As the latter group proved ineffective, it seems that a drug's efficacy in preventing HAE attacks is connected to its 17 alpha-alkylation. Moreover, our long-term observations with the minimum effective dose of danazol seem to indicate the absence of important collateral effects. 相似文献
6.
Roy O. Weller ; Malavika Subash ; Stephen D. Preston ; Ingrid Mazanti ; Roxana O. Carare 《Brain pathology (Zurich, Switzerland)》2008,18(2):253-266
Alzheimer's disease is the commonest dementia. One major characteristic of its pathology is accumulation of amyloid-β (Aβ) as insoluble deposits in brain parenchyma and in blood vessel walls [cerebral amyloid angiopathy (CAA)]. The distribution of Aβ deposits in the basement membranes of cerebral capillaries and arteries corresponds to the perivascular drainage pathways by which interstitial fluid (ISF) and solutes are eliminated from the brain—effectively the lymphatic drainage of the brain. Theoretical models suggest that vessel pulsations supply the motive force for perivascular drainage of ISF and solutes. As arteries stiffen with age, the amplitude of pulsations is reduced and insoluble Aβ is deposited in ISF drainage pathways as CAA, thus, further impeding the drainage of soluble Aβ. Failure of perivascular drainage of Aβ and deposition of Aβ in the walls of arteries has two major consequences: (i) intracerebral hemorrhage associated with rupture of Aβ-laden arteries in CAA; and (ii) Alzheimer's disease in which failure of elimination of ISF, Aβ and other soluble metabolites from the brain alters homeostasis and the neuronal environment resulting in cognitive decline and dementia. Therapeutic strategies that improve elimination of Aβ and other soluble metabolites from the brain may prevent cognitive decline in Alzheimer's disease. 相似文献
7.
Sheikh Rayees Rohit Sharma Gurdarshan Singh Ishtiyaq Ahmad Najar Amarinder Singh Dastagir Basheer Ahamad Subash Chander Sharma Manoj Kumar Tikoo Vijay Kumar Gupta Payare Lal Sangwan Surjeet Singh Surinder Koul Rakesh Kamal Johri 《Environmental toxicology and pharmacology》2013,35(2):347-359
An efflux pump inhibitor, SK-20 (5-(3,4-methylenedioxyphenyle)-4 ethyl-2E,4E-pentadienoic acid piperidide), was assessed for its toxicity at three different pharmacological profiles: acute, sub-acute and general pharmacology with pharmacokinetics. In acute study, the SK-20 was found safe up to a dose of 2000 mg/kg (b.wt.); and at sub-acute, dosages of 50 and 100 mg/kg (b.wt.) were found to be safe. However, dosages of 200 mg or above per kg (b.wt.) showed some morphological alterations in cellular architecture of both liver and kidneys in both sexes, viz., mild vascular congestion along with sporadic hemorrhages and infiltration into renal and hepatic parenchyma by mononucleate cell. General pharmacological studies did not result into any alterations in analgesic, convulsions, rectal temperatures and in the rhythm or the rate of the intestinal motility or the secretion of the bile. While the respiratory and the cardiac rate remained normal, the only parameter to show was the blood pressure, which at all the doses tested, showed a tendency toward reduction. Characteristically, the SK-20 at all doses influenced pentobarbital-induced hypnosis positively and negatively to spontaneous motor activity in a dose dependent manner. Pharmacokinetics of SK-20 revealed it to have retention time at 10.2 min and half life 2.47 h. 相似文献
8.
9.
Rao Vishal Prasad Rachana Subash Anand Sinha Piyush Majumdar Kinjal 《Journal of robotic surgery》2020,14(2):337-341
Journal of Robotic Surgery - The retroauricular approach is being increasingly used in surgeries of head and neck in an attempt to avoid a disfiguring scar over the face or neck. The elevation of... 相似文献
10.
André Jastrzebski Alex Villafranca Subash Sethi Lorne Bellan 《Journal canadien d'anesthésie》2016,63(7):842-850