全文获取类型
收费全文 | 3383篇 |
免费 | 123篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 135篇 |
儿科学 | 102篇 |
妇产科学 | 178篇 |
基础医学 | 213篇 |
口腔科学 | 199篇 |
临床医学 | 263篇 |
内科学 | 595篇 |
皮肤病学 | 47篇 |
神经病学 | 239篇 |
特种医学 | 230篇 |
外科学 | 795篇 |
综合类 | 48篇 |
一般理论 | 1篇 |
预防医学 | 67篇 |
眼科学 | 149篇 |
药学 | 143篇 |
中国医学 | 2篇 |
肿瘤学 | 119篇 |
出版年
2024年 | 1篇 |
2023年 | 33篇 |
2022年 | 47篇 |
2021年 | 70篇 |
2020年 | 35篇 |
2019年 | 73篇 |
2018年 | 70篇 |
2017年 | 74篇 |
2016年 | 104篇 |
2015年 | 97篇 |
2014年 | 132篇 |
2013年 | 182篇 |
2012年 | 211篇 |
2011年 | 240篇 |
2010年 | 133篇 |
2009年 | 124篇 |
2008年 | 255篇 |
2007年 | 279篇 |
2006年 | 278篇 |
2005年 | 288篇 |
2004年 | 251篇 |
2003年 | 188篇 |
2002年 | 137篇 |
2001年 | 69篇 |
2000年 | 39篇 |
1999年 | 31篇 |
1998年 | 14篇 |
1997年 | 12篇 |
1996年 | 13篇 |
1995年 | 6篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 10篇 |
1991年 | 2篇 |
1990年 | 4篇 |
1989年 | 3篇 |
1988年 | 3篇 |
1982年 | 1篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 2篇 |
1974年 | 2篇 |
1971年 | 1篇 |
1966年 | 1篇 |
1965年 | 1篇 |
排序方式: 共有3525条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
T. Erhan Cosan Baki Adapinar Hamdi Cakli M. Kezban Gurbuz 《European archives of oto-rhino-laryngology》2006,263(4):327-330
The case of a child injured by a knitting needle penetrating transorbitally and intracranially, resulting in carotid cavernous fistula and pontine injury, is reported. After receiving medical and endovascular treatment, the only remaining abnormal neurological manifestation was right peripheral facial nerve palsy. The clinical sequences of events and the demonstration of a pontine lesion leading to peripheral facial palsy are presented. Facial nuclear injury with a penetrating trauma is an extremely rare condition. It is important to identify the anatomical regions injured in penetrating traumas. The lesions must be identified by computerized tomography, magnetic resonance imaging, clinical and laboratory investigation. 相似文献
6.
Erkan Yildirim Erkan Kaptanoglu Kanat Ozisik Ethem Beskonakli Ozerk Okutan Mustafa F Sargon Kamer Kilinc Unal Sakinci 《European journal of cardio-thoracic surgery》2004,25(4):523-529
OBJECTIVE: We aimed to demonstrate the time-dependent ultrastructural changes in pneumocyte type II cells following brain injury, and to propose an electron microscopic scoring model for the damage. METHODS: Forty Wistar-Albino female rats weighing 170-200 g were used. The rats were allocated into five groups. The first group was the control and the second was the craniotomy without trauma. The others were trauma groups. Weight-drop method was used for achieving head trauma. Samples were obtained from the right and left pulmonary lobes at 2-, 8-, and 24-h intervals after transcardiac perfusion. An electron microscopic scoring model was used to reveal the changes. RESULTS: There were no ultrastructural pathological findings pointing to lung injury in any rat of the control groups. There was intense intracellular oedema in type II pneumocyte and interstitial oedema in the adjacent tissue in trauma groups. Oedema in mitochondria and dilatation in both smooth endoplasmic reticulum and Golgi apparatus was more evident in the 8- and 24-h trauma groups. The chromatin dispersion was disintegrated in the nucleus in all trauma groups. Scores of all trauma groups were significantly different from the controls (P<0.05). All trauma groups were different from each other at significant levels (P<0.05 for each trauma groups). CONCLUSIONS: The data suggested that ultrastructural damage is obvious at 2 h and deteriorates with time. The electron microscopic scoring model worked well in depicting the traumatic changes, which were supported by lipid peroxidation. Further experiments are needed to determine the exact outcome after brain death model. 相似文献
7.
Z. Bircan M. Soran I. Yildirim M. Doĝan A. Şahin A. Bilici M. Danaci 《International urology and nephrology》1997,29(3):357-361
Radius, ulna, short bones (RUS), carpal (CARP) bone age (BA), tibial corticodiaphyseal (C/D) ratio and trabecular aspect were
assessed in 19 children with steroid dependent nephrotic syndrome and 15 age matched healthy children. Both RUS and CARP BA
were significantly lower than in the controls. Trabecular aspect and tibial C/D ratio did not show any statistical significance.
There was a positive correlation between HSDS and RUS BA delay (r=−0.476, p<0.05); CARP BA delay and RUS BA delay (r=0.563,
p<0.01) and RUS BA and CARP BA (r=0.891, p<0.001). In conclusion, RUS and CARP BA are both retarded and positively correlated
in steroid dependent nephrotic children. 相似文献
8.
Kadir Baykal Sükrü Yildirim Haluk Inal Erdal Kalci Selami Albayrak Hakan Cingil Yavuz Önol 《International journal of urology》1997,4(1):104-105
Metastatic carcinoma to the testis is very rare. Metastasis of prostate adenocarcinoma to testis was detected incidentally after bilateral orchiectomy for hormonal management of metastatic prostate carcinoma. The metastatic lesion was not identified in physical examination or in macroscopic dissection of the testis after surgery. Microscopy revealed an adenocarcinoma which, given the history of the patient and a positive immunohistochemical stain for PSA, was identified as metastatic prostatic adenocarcinoma. 相似文献
9.
Kazim M. Yazici Özlem Kapucu Belkis Erbas Erhan Varoglu Cengiz Gülec Coskun F. Bekdik 《European journal of nuclear medicine and molecular imaging》1992,19(12):1038-1043
Regional cerebral blood flow was investigated in 14 patients with major depression diagnosed according to the DSM-III-R criteria (six patients with single and eight patients with recurrent episodes) and in ten healthy volunteers. The mean ages of the patients and the controls were 33.5 ± 2.7 and 31.6 ± 2.6 years, respectively. The severity of the depression was assessed using the 17-item Hamilton Depression Scale (mean: 23.2 ± 1.5). None of the patients was under medication. After administration of 500 MBq technetium-99m hexamethylpropylene amine oxime, a single photon emission tomography study was performed and then transaxial, sagittal and coronal slices were obtained. For the semiquantitative analysis of the data, the ratios of the mean counts/pixel to the whole slice were calculated for 24 regions on three consecutive transaxial slices in the orbitomeatal plane. Additionally, left/right and frontal/occipital ratios were calculated. Both sides of the temporal region had a significantly decreased cerebral blood flow (CBF) when compared to the controls. The left/right ratio of the prefrontal region was also significantly lower in the patients than in the controls. The Hamilton score had a negative correlation with blood flow in the anterofrontal and left prefrontal regions. According to our results, regional CBF seems to be decreased in the left prefrontal and in both temporal regions in major depression. The severity of depression is correlated with the reduction in CBF in the regions of the anterofrontal and left prefrontal cortex. 相似文献
10.
Ziya Cetinkaya Kazim Esen Ibrahim Hanefi Ozercan Bilal Ustundag Refik Ayten Erhan Aygen 《World journal of emergency surgery : WJES》2006,1(1):37