全文获取类型
收费全文 | 261篇 |
免费 | 22篇 |
国内免费 | 17篇 |
专业分类
儿科学 | 1篇 |
妇产科学 | 1篇 |
基础医学 | 28篇 |
口腔科学 | 6篇 |
临床医学 | 15篇 |
内科学 | 19篇 |
皮肤病学 | 6篇 |
神经病学 | 27篇 |
特种医学 | 6篇 |
外科学 | 38篇 |
综合类 | 56篇 |
预防医学 | 25篇 |
眼科学 | 1篇 |
药学 | 29篇 |
中国医学 | 39篇 |
肿瘤学 | 3篇 |
出版年
2023年 | 3篇 |
2022年 | 7篇 |
2021年 | 11篇 |
2020年 | 7篇 |
2019年 | 3篇 |
2018年 | 6篇 |
2017年 | 9篇 |
2016年 | 11篇 |
2015年 | 9篇 |
2014年 | 13篇 |
2013年 | 19篇 |
2012年 | 10篇 |
2011年 | 21篇 |
2010年 | 21篇 |
2009年 | 14篇 |
2008年 | 14篇 |
2007年 | 19篇 |
2006年 | 11篇 |
2005年 | 11篇 |
2004年 | 9篇 |
2003年 | 12篇 |
2002年 | 3篇 |
2001年 | 5篇 |
2000年 | 8篇 |
1999年 | 7篇 |
1998年 | 4篇 |
1997年 | 1篇 |
1996年 | 6篇 |
1995年 | 3篇 |
1994年 | 3篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1988年 | 4篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1983年 | 1篇 |
1981年 | 3篇 |
1979年 | 2篇 |
排序方式: 共有300条查询结果,搜索用时 265 毫秒
1.
2.
示指血管神经的断面观测 总被引:6,自引:1,他引:6
用27个成人示指作组织切片后,选取近侧、中间和远侧指横纹及相邻横纹1/2处的横断面切片,对指掌侧固有动脉、静脉和神经的位置、形态进行了观测。 相似文献
3.
Saetti MC Marangolo P De Renzi E Rinaldi MC Lattanzi E 《Cortex; a journal devoted to the study of the nervous system and behavior》1999,35(5):675-685
Two patients with the syndrome of proper name anomia were investigated. Both patients were only able to produce around 50% of the names of contemporary celebrities, but performed significantly better on a task calling for naming of historical figures. The names of relatives and friends were spared in one patient, while the other retrieved names of people known since childhood much better than those of people familiar to him since the age of 25. Geographical names, names of monuments and masterpieces were preserved. The above dissociations are taken to imply that in moderately impaired patients, a temporal gradient effect concurs to modulate the severity of the naming block.
A similar impairment was found in both patients when they attempted to retrieve or relearn familiar telephone numbers. This finding suggests that the core of the disorder resides in the inability to gain access to words used to identify a single entity, regardless of whether they belong to the class of proper or common names. 相似文献
4.
5.
Raymond J. Roberge 《Journal of occupational and environmental hygiene》2016,13(4):235-242
Face shields are personal protective equipment devices that are used by many workers (e.g., medical, dental, veterinary) for protection of the facial area and associated mucous membranes (eyes, nose, mouth) from splashes, sprays, and spatter of body fluids. Face shields are generally not used alone, but in conjunction with other protective equipment and are therefore classified as adjunctive personal protective equipment. Although there are millions of potential users of face shields, guidelines for their use vary between governmental agencies and professional societies and little research is available regarding their efficacy. 相似文献
6.
7.
《Medical image analysis》2015,21(1):152-161
This paper proposes a method for automated anatomical labeling of abdominal arteries and a hepatic portal system. In abdominal surgeries, understanding blood vessel structure is critical since it is very complicated. The input of the proposed method is the blood vessel region extracted from the CT volume. The blood vessel region is expressed as a tree structure by applying a thinning process to it and compute the mapping from the branches in the tree structure to the anatomical names. First, several characteristic anatomical names are assigned by rule-based pre-processing. The branches assigned to these names are used as references. The remaining blood vessel names are assigned using a likelihood function trained by a machine-learning technique. Simple rule-based postprocessing can correct several blood vessel names. The output of the proposed method is a tree structure with anatomical names. In an experiment using 50 blood vessel regions manually extracted from abdominal CT volumes, the recall and precision rates of the abdominal arteries were 86.2% and 85.3%, and they were 86.5% and 79.5% for the hepatic portal system. 相似文献
8.
9.
《Journal of cranio-maxillo-facial surgery》2014,42(5):568-576
The objective of this study was to evaluate the effect of Emdogain (Enamel Matrix Derivative, EMD) and Bone Morphogenetic Protein-2 (BMP-2), either solely or in combination, on the gene expression and mineralized nodule formation of alveolar bone proper-derived stem/progenitor cells.Stem/progenitor cells were isolated from human alveolar bone proper, magnetically sorted using STRO-1 antibodies, characterized flowcytometrically for their surface markers' expression, and examined for colony formation and multilineage differentiation potential. Subsequently, cells were treated over three weeks with 100 μg/ml Emdogain (EMD-Group), or 100 ng/ml BMP-2 (BMP-Group), or a combination of 100 ng/ml BMP-2 and 100 μg/ml Emdogain (BMP/EMD-Group). Unstimulated stem/progenitor cells (MACS+-Group) and osteoblasts (OB-Group) served as controls. Osteogenic gene expression was analyzed using RTq-PCR after 1, 2 and 3 weeks (N = 3/group). Mineralized nodule formation was evaluated by Alizarin-Red staining.BMP and EMD up-regulated the osteogenic gene expression. The BMP Group showed significantly higher expression of Collagen-I, III, and V, Alkaline phosphatase and Osteonectin compared to MACS+- and OB-Group (p < 0.05; Two-way ANOVA/Bonferroni) with no mineralized nodule formation.Under in-vitro conditions, Emdogain and BMP-2 up-regulate the osteogenic gene expression of stem/progenitor cells. The combination of BMP-2 and Emdogain showed no additive effect and would not be recommended for a combined clinical stimulation. 相似文献
10.
OBJECTIVE To investigate the preventive use of antibacterials in surgery.METHODS 170 operation histories which are the select date operations of top seven of type I and II incisions in 2007 were reviewed retrospectively and analyzed statistically by quest 相似文献