全文获取类型
收费全文 | 399篇 |
免费 | 22篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 16篇 |
妇产科学 | 4篇 |
基础医学 | 44篇 |
口腔科学 | 11篇 |
临床医学 | 25篇 |
内科学 | 91篇 |
皮肤病学 | 12篇 |
神经病学 | 6篇 |
特种医学 | 33篇 |
外科学 | 56篇 |
综合类 | 17篇 |
预防医学 | 20篇 |
眼科学 | 4篇 |
药学 | 61篇 |
中国医学 | 3篇 |
肿瘤学 | 17篇 |
出版年
2023年 | 4篇 |
2022年 | 4篇 |
2021年 | 7篇 |
2020年 | 5篇 |
2019年 | 2篇 |
2018年 | 9篇 |
2017年 | 4篇 |
2016年 | 10篇 |
2015年 | 10篇 |
2014年 | 12篇 |
2013年 | 20篇 |
2012年 | 19篇 |
2011年 | 19篇 |
2010年 | 24篇 |
2009年 | 13篇 |
2008年 | 22篇 |
2007年 | 22篇 |
2006年 | 16篇 |
2005年 | 11篇 |
2004年 | 21篇 |
2003年 | 10篇 |
2002年 | 9篇 |
2001年 | 6篇 |
2000年 | 12篇 |
1999年 | 13篇 |
1998年 | 9篇 |
1997年 | 5篇 |
1996年 | 7篇 |
1995年 | 2篇 |
1994年 | 4篇 |
1993年 | 5篇 |
1992年 | 7篇 |
1991年 | 4篇 |
1990年 | 3篇 |
1989年 | 4篇 |
1988年 | 9篇 |
1987年 | 7篇 |
1986年 | 4篇 |
1985年 | 2篇 |
1984年 | 6篇 |
1983年 | 6篇 |
1982年 | 6篇 |
1980年 | 2篇 |
1978年 | 3篇 |
1977年 | 4篇 |
1976年 | 8篇 |
1975年 | 3篇 |
1972年 | 2篇 |
1971年 | 2篇 |
1965年 | 1篇 |
排序方式: 共有422条查询结果,搜索用时 15 毫秒
1.
Neuroimaging in Pineal Tumors 总被引:4,自引:0,他引:4
F Reis MD AV Faria MD PhD VA Zanardi MD PhD JR Menezes MD F Cendes MD PhD LS Queiroz MD PhD 《Journal of neuroimaging》2006,16(1):52-58
BACKGROUND AND PURPOSE: The authors report radiological findings in 11 tumors in the pineal region, which were histologically diagnosed as germinomas, pineocytomas pineoblastomas, ependymomas, teratomas, and astrocytomas. METHODS: Computed tomography (CT) was performed in seven patients and magnetic resonance imaging (MRI) was performed in all patients. RESULTS: CT showed a solid or solid/cystic mass with variable contrast enhancement. MRI showed a heterogeneous mass, with hypointense signal on T1 and iso/hyperintense signal on T2-weighted images (WI) and gadolinium enhancement. Extension to adjacent structures occurred in five patients and spread through the cerebral spinal fluid (CSF) in two. CONCLUSIONS: Pineal region tumors have no pathognomonic imaging pattern. MRI and CT are complementary in diagnosis and are important to determine localization, extension, and meningeal spread. 相似文献
2.
Joint influence of fat and lean body composition compartments on femoral bone mineral density in premenopausal women. 总被引:8,自引:0,他引:8
M F Sowers A Kshirsagar M M Crutchfield S Updike 《American journal of epidemiology》1992,136(3):257-265
Body composition (fat and lean compartments) and bone mineral density were measured in 246 healthy premenopausal women, aged 20-40 years, residing in Tecumseh, Michigan. Body composition was measured using four-point bioelectrical impedance and values for fat and lean compartments categorized into tertiles. Additionally, each woman was classified into one of nine different cells based on her location within a 3 x 3 table which reflects the joint distribution of both fat and lean compartments. Bone mineral density of the proximal femur, including the femoral neck and trochanter, was measured using dual photon densitometry. The mean femoral neck bone mineral density values increased significantly and linearly for each tertile of muscle mass (0.90, 0.95, and 1.02 g/cm2, p less than 0.0002). Femoral bone mineral density increased significantly but not linearly as the fat compartment progressed from the lowest to the highest tertile (0.95, 0.93, and 0.99 g/cm2). Bone mineral density of the proximal femur was similar and significantly greater in the high muscle/low fat and high muscle/high fat body composition subgroups compared with bone mineral density in the seven other groups. However, women in the high muscle/low fat subgroup had substantially lower mean weight (67 vs. 91 kg, p less than 0.0001) and mean Quetelet index (22.1 vs. 33.7 kg/m2, p less than 0.0001) than women in the high muscle/high fat subgroup. Bone mineral density values were similar and significantly lower in the following body composition cells: low muscle/low fat, low muscle/medium fat, and low muscle/high fat. Similar findings were observed at the trochanteric site. Low muscle is a risk factor for low bone mineral density in young adult women while higher fat is protective only when associated with substantial muscle. 相似文献
3.
V K Nayak N K Desai N A Kshirsagar S D Bhandarkar R S Satoskar 《Journal of postgraduate medicine》1991,37(1):5-8
Pathological conditions are known to affect pharmacokinetics of many drugs. Antipyrine half-life is used as a marker of liver microsomal enzyme function. Antipyrine pharmacokinetics, therefore, was investigated in 23 thyrotoxic and 11 euthyroid goitre patients. Of these, 11 thyrotoxic and 9 euthyroid goitre patients also participated in doxycycline bioavailability studies. In thyrotoxic patients, antipyrine half-life and AUCo infinity and doxycycline Cpmax and AUCo infinity were found to be reduced as compared to those of healthy euthyroid normal subjects. Following treatment of thyrotoxicosis, the antipyrine half-life and AUCo infinity returned to normal. Doxycycline AUCo infinity returned to near normal range but Cpmax did not. 相似文献
4.
5.
Effect of food on doxycycline absorption 总被引:1,自引:0,他引:1
6.
Myo-inositol transport in the central nervous system 总被引:18,自引:0,他引:18
7.
Emergence of a nephropathogenic avian infectious bronchitis virus with a novel genotype in India 总被引:4,自引:0,他引:4
Bayry J Goudar MS Nighot PK Kshirsagar SG Ladman BS Gelb J Ghalsasi GR Kolte GN 《Journal of clinical microbiology》2005,43(2):916-918
We describe the emergence of a nephropathogenic avian infectious bronchitis virus (IBV) with a novel genotype in India. The Indian IBV isolate exhibited a relatively high degree of sequence divergence with reference strains. The highest homology was observed with strain 6/82 (68%) and the least homology with strain Mex/1765/99 (34.3%). 相似文献
8.
9.
Pharmacological characterization of ZYDPLA1, a novel long‐acting dipeptidyl peptidase‐4 inhibitor 下载免费PDF全文
10.
Labial adhesions are usually seen in early childhood or in the postmenopausal years, but this clinical entity is rarely seen in the reproductive years. We report a case of labial adhesion with acute urinary retention secondary to Bartholin's abscess in a reproductive‐aged woman with normal menstrual periods. We emphasize the possible occurrence of labial adhesion following Bartholin's abscess in the reproductive years with normal estrogen levels. 相似文献