全文获取类型
收费全文 | 1689篇 |
免费 | 87篇 |
国内免费 | 35篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 87篇 |
妇产科学 | 18篇 |
基础医学 | 242篇 |
口腔科学 | 35篇 |
临床医学 | 164篇 |
内科学 | 487篇 |
皮肤病学 | 59篇 |
神经病学 | 62篇 |
特种医学 | 87篇 |
外科学 | 205篇 |
综合类 | 70篇 |
预防医学 | 74篇 |
眼科学 | 29篇 |
药学 | 79篇 |
中国医学 | 4篇 |
肿瘤学 | 89篇 |
出版年
2023年 | 14篇 |
2022年 | 20篇 |
2021年 | 47篇 |
2020年 | 31篇 |
2019年 | 31篇 |
2018年 | 38篇 |
2017年 | 33篇 |
2016年 | 31篇 |
2015年 | 44篇 |
2014年 | 42篇 |
2013年 | 61篇 |
2012年 | 88篇 |
2011年 | 74篇 |
2010年 | 46篇 |
2009年 | 53篇 |
2008年 | 76篇 |
2007年 | 105篇 |
2006年 | 74篇 |
2005年 | 63篇 |
2004年 | 94篇 |
2003年 | 88篇 |
2002年 | 64篇 |
2001年 | 64篇 |
2000年 | 44篇 |
1999年 | 50篇 |
1998年 | 36篇 |
1997年 | 30篇 |
1996年 | 35篇 |
1995年 | 17篇 |
1994年 | 26篇 |
1993年 | 8篇 |
1992年 | 13篇 |
1991年 | 24篇 |
1990年 | 23篇 |
1989年 | 24篇 |
1988年 | 14篇 |
1987年 | 22篇 |
1986年 | 23篇 |
1985年 | 21篇 |
1984年 | 14篇 |
1982年 | 7篇 |
1981年 | 6篇 |
1980年 | 8篇 |
1979年 | 13篇 |
1978年 | 8篇 |
1977年 | 17篇 |
1976年 | 5篇 |
1974年 | 5篇 |
1970年 | 6篇 |
1945年 | 4篇 |
排序方式: 共有1811条查询结果,搜索用时 15 毫秒
1.
2.
SH Lee† CP Choi‡ HC Eun† OS Kwon† 《Journal of the European Academy of Dermatology and Venereology》2006,20(7):860-863
BACKGROUND: On December 26, 2004, the biggest earthquake for 40 years, measuring 9.0 on the Richter scale, triggered a tsunami that pounded the coastal areas of South Asia and East Africa. The effects of the tsunami on skin conditions have not been evaluated. OBJECTIVE: To determine the influence of the tsunami on skin conditions by evaluating the skin problems of patients presenting at hospitals after the tsunami. METHODS: Between 5 and 25 January 2005, two dermatologists evaluated patients who complained of skin problems at an outpatient clinic and emergency room of a general hospital in Banda Aceh, Aceh Province, Indonesia. RESULTS: The total number of patients that presented during the study period was 235 (131 males and 104 females), and they had a total of 265 skin problems. In terms of age distribution, most subjects were in their fourth decade (23.0%), followed by the third (22.6%) and fifth decade (16.6%). The most prevalent skin problems were infections-infestations (32.5%), followed by eczemas (29.8%) and traumatic skin disorders (29.4%). In males, traumatic skin disorders were most common. The great majority of infection-infestation cases involved superficial fungal infections. Contact dermatitis accounted for three-quarters of eczema cases, and mainly involved the arms (40.0%) and legs (27.1%). The majority of traumatic skin disorders were lacerations, punctures and penetrations, and the feet (44.7%) and hands (18.8%) were most frequently affected. CONCLUSIONS: Unhygienic conditions, exposure to a hazardous environment and contact with various objects during and after the tsunami probably increased the prevalence of infections-infestations, traumatic skin disorders and contact dermatitis. To prevent these problems and associated secondary bacterial infections, health-related education and early medical management are required. 相似文献
3.
4.
Isolation of Stomatococcus mucilaginosus from drug user with endocarditis. 总被引:4,自引:4,他引:0 下载免费PDF全文
P E Coudron S M Markowitz L B Mohanty P F Schatzki J M Payne 《Journal of clinical microbiology》1987,25(8):1359-1363
Stomatococcus mucilaginosus was isolated from the blood of a patient with endocarditis and a past history of drug abuse and aortic valve replacement. At autopsy, Gram stain of the aortic valve revealed gram-positive cocci. Our isolate was atypical for S. mucilaginosus in that colonies were nonmucoid and nonadherent to agar surfaces. Cellular capsules were demonstrated by light and electron microscopy. Phenotypic characteristics identified by conventional methods as well as profile numbers obtained by using two commercial identification systems for staphylococci, the API Staph-Ident and the dms Staph Trac, are presented. Practical tests that differentiate S. mucilaginosus from the genera Micrococcus and Staphylococcus include growth on nutrient agar containing salt and lysostaphin susceptibility. Additional tests that helped differentiate our isolate from group D streptococci included hydrolysis of L-pyrrolidonyl-beta-naphthylamide and streptococcal serogrouping. 相似文献
5.
Meg Sears C Robin Walker Richard HC van der Jagt Paul Claman 《Paediatrics & child health》2006,11(4):229-234
Pesticide regulation is examined in the context of Health Canada’s Pest Management Regulatory Agency’s assessment of the chlorophenoxy herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) for turf. 2,4-D is the most common herbicide used to kill weeds in grass.The medical literature does not uniformly indicate harms from herbicides. However, the balance of epidemiological research suggests that 2,4-D can be persuasively linked to cancers, neurological impairment and reproductive problems. These may arise from 2,4-D itself, from breakdown products or dioxin contamination, or from a combination of chemicals.Regulators rely largely on toxicology, but experiments may not replicate exposures from 2,4-D application to lawns because environmental breakdown products (eg, 2,4-dichlorophenol) may not accumulate and selected herbicides are possibly less contaminated. Dioxins are bioaccumulative chemicals that may cause cancer, harm neurological development, impair reproduction, disrupt the endocrine system and alter immune function. No dioxin analyses were submitted to the Pest Management Regulatory Agency, and the principal contaminants of 2,4-D are not among the 17 congeners covered in pesticide regulation. Independent assessment of all dioxins is needed, in tissues and in the environment.The 2,4-D assessment does not approach standards for ethics, rigour or transparency in medical research. Canada needs a stronger regulator for pesticides. Potentially toxic chemicals should not be registered when more benign solutions exist, risks are not clearly quantifiable or potential risks outweigh benefits. Until landscaping pesticides are curtailed nationally, local bylaws and Quebec’s Pesticide Code are prudent measures to protect public health. Physicians have a role in public education regarding pesticides. 相似文献
6.
A. Ravikumar S. Mohanty R. P. Vatsanath S. Raghunandhan 《Indian journal of otolaryngology and head and neck surgery》2004,56(4):317-320
The co-existence of fungal elements in allergic nasal Polyposis, has given rise to a distinct clinical entity known as ‘Allergic
fungal sinusitis ’ (AF’S). Many a time, these fungal elements may not be diagnosed pre-operatively by routine diagnostic nasal
endoscopy or CT scan of paranasal sinuses, due to the florid presentation of nasal polyps, which usually obscure the underlying
fungal pathology. The diagnosis is often made intra-operatively. The post-operative confirmation of AFS is by histopathology,
fungal smear, fungal culture, allergic murin study and fungal specific IgE titres. We report a series often such cases done
in our institution, which highlight that AFS should be considered as a differential diagnosis in Sinonasal Polyposis cases,
for their effective management. 相似文献
7.
8.
9.
10.
A. Satish Chandra Sanjeev Mohanty 《Indian journal of otolaryngology and head and neck surgery》2007,59(1):43-44
Role of Embolisation in preoperative management of Nasopharyngeal angiofibroma is well established in present day therapeutic
modalities. An improvised technique i.e., subselective embolisation has been provided by Interventional radiologists to fortify
the therapeutic results. This study compares the final outcome of seven cases, four of which were embolised pre operatively.
Each case was dealt with varying surgical approaches. 相似文献