全文获取类型
收费全文 | 3126篇 |
免费 | 218篇 |
国内免费 | 13篇 |
专业分类
耳鼻咽喉 | 14篇 |
儿科学 | 116篇 |
妇产科学 | 133篇 |
基础医学 | 560篇 |
口腔科学 | 6篇 |
临床医学 | 177篇 |
内科学 | 595篇 |
皮肤病学 | 97篇 |
神经病学 | 146篇 |
特种医学 | 97篇 |
外科学 | 329篇 |
综合类 | 142篇 |
一般理论 | 2篇 |
预防医学 | 260篇 |
眼科学 | 121篇 |
药学 | 336篇 |
中国医学 | 39篇 |
肿瘤学 | 187篇 |
出版年
2022年 | 42篇 |
2021年 | 58篇 |
2020年 | 27篇 |
2019年 | 47篇 |
2018年 | 56篇 |
2017年 | 31篇 |
2016年 | 51篇 |
2015年 | 69篇 |
2014年 | 94篇 |
2013年 | 133篇 |
2012年 | 238篇 |
2011年 | 262篇 |
2010年 | 122篇 |
2009年 | 98篇 |
2008年 | 173篇 |
2007年 | 157篇 |
2006年 | 173篇 |
2005年 | 164篇 |
2004年 | 143篇 |
2003年 | 138篇 |
2002年 | 111篇 |
2001年 | 97篇 |
2000年 | 95篇 |
1999年 | 73篇 |
1998年 | 48篇 |
1997年 | 26篇 |
1996年 | 20篇 |
1995年 | 23篇 |
1994年 | 28篇 |
1993年 | 23篇 |
1992年 | 56篇 |
1991年 | 47篇 |
1990年 | 37篇 |
1989年 | 38篇 |
1988年 | 29篇 |
1987年 | 30篇 |
1986年 | 35篇 |
1985年 | 30篇 |
1984年 | 22篇 |
1983年 | 17篇 |
1982年 | 11篇 |
1979年 | 12篇 |
1978年 | 15篇 |
1977年 | 13篇 |
1976年 | 11篇 |
1975年 | 11篇 |
1974年 | 11篇 |
1973年 | 15篇 |
1972年 | 11篇 |
1968年 | 12篇 |
排序方式: 共有3357条查询结果,搜索用时 15 毫秒
991.
Khanna G Bhattacharya SN Singhal A Singh N Sharma S 《Indian journal of pathology & microbiology》2004,47(4):542-544
An elderly HIV negative woman with disseminated cryptococcosis is reported. The clinical presentation was unusual. Rapid diagnosis is possible if Maltese crosses are demonstrated on polarizing microscopy of tissue sections or smears. Cutaneous involvement in cryptococcosis is uncommon, however when present, can be a valuable and relatively easily available source of material from which Cryptococci can be demonstrated. 相似文献
992.
Thirty children (45 units) in the age group 1 day-12 yrs with primary vesicoureteral reflux were studied prospectively and periodically assessed for renal function, scarring, grade of reflux and somatic growth parameters. Four children (6 units) with grade IV reflux underwent ureteric reimplantation. Complete resolution with medical management was seen in all 12 units of grade I-III reflux and in 5 of the remaining 27 units of grade IV-V reflux over 6 months-6 yrs. This group showed highly significant improvement in height . The weight gain of the above 2 groups was statistically significant compared to those with persistent reflux. Focal defects were seen initially in 62 percent refluxing units. None of the patients showed deterioration in renal function or formation of new scars over the next 1-7 years. Three children on conservative management showed persistent growth retardation with associated breakthrough infection, hypertension, multiple renal scars and poor renal functional volume. 相似文献
993.
994.
Bhattacharyya KB Senapati A Basu S Bhattacharya S Ghosh S 《Acta neurologica Scandinavica》2003,108(3):216-220
Bobble-head doll syndrome is a rare and unique movement disorder encountered in children. It is characterized by continuous or episodic involuntary forward and backward and side to side movement of the head at the frequency of 2-3 Hz. Neuroimaging in most of the cases reveals third ventricular tumors, suprasellar arachnoid cysts, aqueductal stenosis and other lesions in the region of the third ventricle along with communicating hydrocephalus. In most of the circumstances, the problem starts in the first decade of life and diversion of cerebrospinal fluid by shunt operation is very often accompanied by dramatic improvement. We report one case where bobbing of the head started at around 12 years of age. Additionally, there was evidence of partial left abducens nerve palsy, tremor in the outstretched hands, difficulty in finger-nose test and tandem walking, hyperreflexia and extensor plantar response. He was unconscious on two occasions and there was evidence of gross hydrocephalus along with a thin membranous web, running transversely across the lower part of the aqueduct of Sylvius without any cerebrospinal fluid flow void. Ventriculo-peritoneal shunt abolished the abnormal movements. We propose that the aqueductal web was the offending agent for the pathogenesis of bobble-head doll syndrome in our case and this lesion has not been identified in the cases reported so far. Relevant literature in this regard has also been reviewed. 相似文献
995.
We report the characteristic neuropathological features of a rare case of cerebellar liponeurocytoma in a 62-year-old female. The tumor has a low proliferative potential and carries a favorable prognosis. 相似文献
996.
997.
Dunning K LeMasters G Levin L Bhattacharya A Alterman T Lordo K 《American journal of industrial medicine》2003,44(6):664-672
BACKGROUND: Although falls are a major source of trauma during pregnancy and 70% of pregnant women are employed, information on falls among pregnant workers is lacking. Study objectives were to estimate fall prevalence and risk factors among pregnant workers. METHODS: This retrospective cohort study used birth certificates to identify recently pregnant women. Data were collected via phone, internet, and mail surveys. The primary outcome investigated was a fall at work during pregnancy. Adjusted odds ratios (aOR) and confidence intervals (CI) were calculated. RESULTS: Of the 2,847 employed women, 26.6% (757) fell during their pregnancy and 6.3% (179) fell at work. Walking on slippery floors, hurrying, or carrying an object occurred in 66.3% of work falls. CONCLUSION: The service and teaching industry should be evaluated for risk reduction. Future research should determine if counseling during pregnancy will reduce falls in the workplace. 相似文献
998.
Khan A Nandi RK Das SC Ramamurthy T Khanam J Shimizu T Yamasaki S Bhattacharya SK Chaicumpa W Takeda Y Balakrish Nair G 《Epidemiology and infection》2003,130(2):179-186
While searching for Escherichia coli O157 in the aquatic environment of Calcutta using an immunodetection procedure, we fortuitously detected five strains of Citrobacter braakii, which cross-reacted with the commercially available O157 polyvalent antiserum. The five C. braakii isolates gave positive results when a sensitive dot-ELISA was performed with E. coli O157 monoclonal antibody. Further, the O157 monoclonal antibody recognized the bands of proteinase K treated whole cells of lipopolysaccharide of all the C. braakii isolates. Apart from weak reactions with two or three of the DNA probes, all the C. braakii strains did not hybridize with the other probes spanning the minimum region required for O157 O-antigen biosynthesis. These strains did not possess any of the virulence genes that are commonly found in the Shiga toxin-producing E. coli (STEC) specially the serotype O157: H7. Therefore, it appears that the serological cross-reaction between C. braakii and E. coli O157 antiserum is based on structural mimicry between the O-polysaccharide of C. braakii and E. coli O157. 相似文献
999.
1000.
Chatterjee S Das S Khan JA Bhattacharya RN 《Journal of the Indian Medical Association》2003,101(1):24, 26
Congenital fistulae of the neck are branchial in origin and of these 2nd arch fistula is by far the most common, 3rd and 4th arch fistulae being very rare. Here, a case of fistula present since birth and extending from the neck, near the midline to the alveololingual sulcus, considered very rare, is presented. The patient was a 32-year-old male having sticky discharge through an opening in the upper part of the neck. Examination revealed an opening of approximately 1 mm diameter about 1 cm to the left of the midline just above the hyoid bone. A sinogram revealed a fistulous linear tract communicating with the oral cavity. Surgery was undertaken and the fistulous tract was excised. 相似文献