全文获取类型
收费全文 | 1029篇 |
免费 | 97篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 28篇 |
儿科学 | 72篇 |
妇产科学 | 7篇 |
基础医学 | 138篇 |
口腔科学 | 44篇 |
临床医学 | 125篇 |
内科学 | 203篇 |
皮肤病学 | 47篇 |
神经病学 | 46篇 |
特种医学 | 157篇 |
外国民族医学 | 1篇 |
外科学 | 71篇 |
综合类 | 42篇 |
预防医学 | 57篇 |
眼科学 | 5篇 |
药学 | 60篇 |
中国医学 | 3篇 |
肿瘤学 | 29篇 |
出版年
2023年 | 4篇 |
2020年 | 6篇 |
2019年 | 9篇 |
2018年 | 10篇 |
2017年 | 15篇 |
2016年 | 14篇 |
2015年 | 28篇 |
2014年 | 16篇 |
2013年 | 30篇 |
2012年 | 24篇 |
2011年 | 30篇 |
2010年 | 37篇 |
2009年 | 45篇 |
2008年 | 35篇 |
2007年 | 26篇 |
2006年 | 20篇 |
2005年 | 23篇 |
2004年 | 36篇 |
2003年 | 29篇 |
2002年 | 16篇 |
2001年 | 13篇 |
2000年 | 21篇 |
1999年 | 23篇 |
1998年 | 60篇 |
1997年 | 65篇 |
1996年 | 59篇 |
1995年 | 44篇 |
1994年 | 46篇 |
1993年 | 38篇 |
1992年 | 13篇 |
1991年 | 20篇 |
1990年 | 20篇 |
1989年 | 23篇 |
1988年 | 30篇 |
1987年 | 30篇 |
1986年 | 26篇 |
1985年 | 15篇 |
1984年 | 6篇 |
1983年 | 12篇 |
1982年 | 21篇 |
1981年 | 5篇 |
1980年 | 11篇 |
1979年 | 6篇 |
1978年 | 9篇 |
1977年 | 8篇 |
1976年 | 10篇 |
1975年 | 3篇 |
1968年 | 3篇 |
1902年 | 3篇 |
1899年 | 3篇 |
排序方式: 共有1135条查询结果,搜索用时 984 毫秒
1.
Antigen detection techniques are available for the identification of bacterial polysaccharides, viruses, and chlamydia. Viruses and chlamydia are detected by direct immunofluorescence (DFA) or enzyme immunoassay (EIA). Bacterial polysaccharides are detected by latex agglutination or staphylococcal coagglutination of serum or concentrated urine. Most studies have not compared these techniques to the gold standard of lung puncture, so the role of dual infections with bacteria and viruses cannot be adequately determined. The sensitivity of any of these techniques is dependent on the quality of the antisera used. Monoclonal sera are now available for the detection of most viruses and seem to be as sensitive as polyclonal sera. DFA or EIA may offer equal sensitivity but their advantages and disadvantages must be considered by the local diagnostic laboratories. Most DFA and EIA systems have a sensitivity of 90% when compared with viral cultural for the identification of the organism. Agglutination reagents are available commercially for the detection of pneumococcal and Hemophilus influenzae type b polysaccharides. The sensitivity and specificity of each brand should be determined on serum or urine from patients known to have positive blood cultures and those free of disease. The brand chosen should be the one that has reasonable sensitivity and specificity. Rapid diagnostic techniques are helpful if they are used within a clinical context and they are positive. Negative tests do not rule out infection. 相似文献
2.
3.
4.
Ketai LH; Williamson MR; Telepak RJ; Levy H; Koster FT; Nolte KB; Allen SE 《Radiology》1994,191(3):665
5.
6.
7.
S. van Ruth† EBL van Dorst‡ MR Canninga-van Dijk§ MS de Bruin-Weller† 《Journal of the European Academy of Dermatology and Venereology》2007,21(5):678-680
Cutaneous metastasis of vaginal carcinoma is extremely rare. So far, the total number of reported skin metastasis of vaginal carcinoma is only one. We present another case with an unusual manifestation of vagina carcinoma metastasis: skin metastasis presenting as a leg ulcer on the lower leg. 相似文献
8.
9.
We examined the effect of hydrocortisone succinate on the growth of three isolates of Chlamydia pneumoniae in vitro. There was a significant increase in the number of inclusions seen in two of the C. pneumoniae strains in the presence of hydrocortisone. There was no significant increase in the number of inclusions with various concentrations of hydrocortisone over time. The addition of hydrocortisone did not affect the in vitro activities of azithromycin, erythromycin, and doxycycline against C. pneumoniae. 相似文献
10.
Localization of a gene for otosclerosis to chromosome 15q25-q26 总被引:5,自引:0,他引:5
Tomek MS; Brown MR; Mani SR; Ramesh A; Srisailapathy CR; Coucke P; Zbar RI; Bell AM; McGuirt WT; Fukushima K; Willems PJ; Van Camp G; Smith RJ 《Human molecular genetics》1998,7(2):285-290
Among white adults otosclerosis is the single most common cause of hearing
impairment. Although the genetics of this disease are controversial, the
majority of studies indicate autosomal dominant inheritance with reduced
penetrance. We studied a large multi- generational family in which
otosclerosis has been inherited in an autosomal dominant pattern. Five of16
affected persons have surgically confirmed otosclerosis; the remaining nine
have a conductive hearing loss but have not undergone corrective surgery.
To locate the disease- causing gene we completed genetic linkage analysis
using short tandem repeat polymorphisms (STRPs) distributed over the entire
genome. Multipoint linkage analysis showed that only one genomic region, on
chromosome 15q, generated a lod score >2.0. Additional STRPs were typed
in this area, resulting in a lod score of 3.4. STRPs FES (centromeric) and
D15S657 (telomeric) flank the 14. 5 cM region that contains an otosclerosis
gene.
相似文献