全文获取类型
收费全文 | 1065篇 |
免费 | 55篇 |
国内免费 | 36篇 |
专业分类
耳鼻咽喉 | 42篇 |
儿科学 | 37篇 |
妇产科学 | 22篇 |
基础医学 | 132篇 |
口腔科学 | 12篇 |
临床医学 | 136篇 |
内科学 | 319篇 |
皮肤病学 | 31篇 |
神经病学 | 74篇 |
特种医学 | 126篇 |
外科学 | 81篇 |
综合类 | 20篇 |
预防医学 | 37篇 |
眼科学 | 2篇 |
药学 | 47篇 |
肿瘤学 | 38篇 |
出版年
2021年 | 9篇 |
2019年 | 8篇 |
2018年 | 13篇 |
2017年 | 11篇 |
2016年 | 22篇 |
2015年 | 28篇 |
2014年 | 12篇 |
2013年 | 25篇 |
2012年 | 42篇 |
2011年 | 42篇 |
2010年 | 37篇 |
2009年 | 30篇 |
2008年 | 44篇 |
2007年 | 64篇 |
2006年 | 35篇 |
2005年 | 49篇 |
2004年 | 27篇 |
2003年 | 53篇 |
2002年 | 44篇 |
2001年 | 40篇 |
2000年 | 47篇 |
1999年 | 48篇 |
1998年 | 32篇 |
1997年 | 25篇 |
1996年 | 23篇 |
1995年 | 12篇 |
1994年 | 17篇 |
1993年 | 23篇 |
1992年 | 15篇 |
1991年 | 10篇 |
1990年 | 14篇 |
1989年 | 23篇 |
1988年 | 13篇 |
1987年 | 11篇 |
1986年 | 14篇 |
1985年 | 17篇 |
1984年 | 8篇 |
1983年 | 7篇 |
1982年 | 7篇 |
1981年 | 12篇 |
1980年 | 15篇 |
1978年 | 10篇 |
1976年 | 11篇 |
1975年 | 9篇 |
1974年 | 9篇 |
1972年 | 10篇 |
1971年 | 11篇 |
1970年 | 9篇 |
1968年 | 9篇 |
1967年 | 7篇 |
排序方式: 共有1156条查询结果,搜索用时 15 毫秒
1.
Methicillin‐resistant Staphylococcus aureus eradication in young infants should include the diaper area and treat housing contacts
下载免费PDF全文
![点击此处可从《Acta paediatrica (Oslo, Norway : 1992)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
2.
3.
B R Bach D J Daluga R Mikosz T P Andriacchi R Seidl 《The American journal of sports medicine》1992,20(1):67-71; discussion 71-72
The percent force changes in the posterior cruciate ligament were calculated using a previously validated computerized knee model after the femoral insertion sites were varied 2.5 and 5.0 mm in an anterior, posterior distal, anterior distal, and posterior distal direction. The tibial insertion sites were also varied 2.5 and 5.0 mm in the medial, lateral, proximal, and distal directions. Percent force changes were measured over a range of 0 degree to 90 degrees. These insertion sites simulated potential surgical placement errors. Results of this study demonstrated that the greatest percent force changes in the posterior cruciate ligament were at full extension. The greatest absolute percent force change between 0 degree and 90 degrees of flexion was with a femoral insertion of the posterior cruciate ligament placed 5 mm anterior to its normal attachment site, which resulted in a 39% change in the posterior cruciate ligament force. Distal femoral site attachment had the least effect (10% at 5.0 mm). Alterations at the tibial attachment site were less sensitive than on the femur; the greatest absolute percent force changes occurred with medial and lateral attachment sites (14% and 15%, respectively, at 5.0 mm). A minimal amount of percent force changes were seen between 45 degrees and 75 degrees of knee flexion in all positions tested for both tibial and femoral attachment sites. This model suggests that, like the anterior cruciate ligament, the force in the posterior cruciate ligament is also sensitive to attachment site position. As in anterior cruciate ligament studies, the femoral attachment site was found to be more sensitive.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
4.
5.
Adverse reaction to intravenous gadoteridol 总被引:1,自引:0,他引:1
6.
Rainer O. Seidl Ingo Todt Arne Ernst 《European archives of oto-rhino-laryngology》2007,264(3):291-293
We report on a case of esophageal atresia following cervical spine surgery. A swallowing examination was performed using fibre-optic
endoscopy and videofluoroscopy. There was scar tissue fixation of the larynx and esophagus to the cervical spine. Operative
mobilization of the larynx and esophagus and formation of a sliding layer using a platysma-fascia flap was done. The PEG and
tracheal cannula were removed; oral nutrition was initiated after 3 months. Swallowing disorders following operations on the
upper cervical spine should be investigated. Careful preparation that preserves the layers should be carried out. Fixation
of tissues as a result of scarring should be treated with a sliding layer. 相似文献
7.
Ulrike Lueken Ulrich Seidl Lena V?lker Elisabeth Schweiger Andreas Kruse Johannes Schr?der 《The American journal of geriatric psychiatry》2007,15(5):376-385
OBJECTIVE: Apathy is among the most frequent neuropsychiatric symptoms in dementia, particularly Alzheimer disease. The Apathy Evaluation Scale (AES) has been widely employed for assessing apathy in different patient groups. To further facilitate the usage of the AES, an abbreviated version was constructed. METHOD: On basis of a sample of 356 nursing home residents, a cross-validation procedure was carried out to develop a brief version of the AES. According to a thorough clinical examination, 85% of the residents were demented, 8% presented with mild cognitive impairment, whereas 7% did not present any cognitive deficits. After subdividing the patient group into two matched samples, the first subsample was used to identify problematic items due to defined psychometric and content-related criteria. The original 18-item scale was thus reduced to 10 items. Psychometric properties of the shortened version were subsequently reassessed in the second subsample. RESULTS: The short version demonstrated favorable psychometric properties that could be confirmed by cross-validation with the second sample. Correlations with the original full-length version were high (r = 0.97 for both subsamples); the shortened scale yielded no substantial losses regarding internal consistency or construct validity (correlations with the respective subscales of the Neuropsychiatric Inventory). CONCLUSION: The frequency of apathetic symptoms in the nursing home residents included confirms the clinical importance of apathy for understanding dementia. Given this specific patient population, setting, and mode of data collection, the short-version AES seems to be a valuable and time-efficient instrument for assessing apathy. 相似文献
8.
R. Gottschalk C. Seidl T. Löffler E. Seifried D. Hoelzer J.P. Kaltwasser 《Tissue antigens》1998,51(3):270-275
Abstract: Genetic hemochromatosis (GH) is closely associated with genes of the major histocompatibility complex (MHC) on chromosome 6. Recently, a candidate gene for GH, with structural similarities to MHC class I genes, designated HLA-H and presently named HFE, has been cloned. The HFE gene is localized telomeric to the MHC and several reports have indicated that the HFE gene is mutated in GH patients. In the present study we have analyzed the relationship of HFE gene variants and disease manifestation in GH patients and family members. Fifty-seven patients with GH, 73 family members and 153 healthy blood donors were studied for the amino acid dimorphism at codon 63 (His63Asp=H63D) and codon 282 (Cys282Tyr= C282Y) of the HFE gene. The codon 63 and 282 dimorphism were defined by PCR amplification of genomic DNA samples and restriction enzyme digestion using RsaI/SnaBI for C282Y and Bcll/Mbo 1 for H63D. Ferritin, transferrin serum levels and total iron-binding capacity were determined prior to therapeutic intervention. The Tyr-282 substitution occurred in 53 (93%) of patients compared with 8 (5.2%) of controls (OR=169, P >0.0001). Fifty-one (90%) patients were Tyr-282 homozygous. In contrast, the Asp-63 substitution was present in 5 (8.8%) of the patients compared with 34 (22%) of controls (OR=0.39, P =NS) with none of the patients being homozygous. In Tyr-282 homozygous GH patients serum ferritin levels, transferrin saturation, liver iron and liver iron index were elevated significantly compared to Tyr-282-negative patients, whereas no difference was observed between Tyr/Cys-282 heterozygous and Tyr-282-negative patients. 相似文献
9.
Intestinal schistosomiasis japonica: CT-pathologic correlation 总被引:1,自引:0,他引:1
Lee RC; Chiang JH; Chou YH; Rubesin SE; Wu HP; Jeng WC; Hsu CC; Tiu CM; Chang T 《Radiology》1994,193(2):539
10.