全文获取类型
收费全文 | 7119篇 |
免费 | 387篇 |
国内免费 | 35篇 |
专业分类
耳鼻咽喉 | 114篇 |
儿科学 | 356篇 |
妇产科学 | 100篇 |
基础医学 | 791篇 |
口腔科学 | 184篇 |
临床医学 | 465篇 |
内科学 | 1623篇 |
皮肤病学 | 265篇 |
神经病学 | 343篇 |
特种医学 | 126篇 |
外科学 | 1160篇 |
综合类 | 165篇 |
一般理论 | 2篇 |
预防医学 | 318篇 |
眼科学 | 274篇 |
药学 | 622篇 |
中国医学 | 35篇 |
肿瘤学 | 598篇 |
出版年
2023年 | 43篇 |
2022年 | 81篇 |
2021年 | 251篇 |
2020年 | 144篇 |
2019年 | 194篇 |
2018年 | 245篇 |
2017年 | 152篇 |
2016年 | 212篇 |
2015年 | 226篇 |
2014年 | 317篇 |
2013年 | 413篇 |
2012年 | 636篇 |
2011年 | 613篇 |
2010年 | 350篇 |
2009年 | 280篇 |
2008年 | 462篇 |
2007年 | 426篇 |
2006年 | 420篇 |
2005年 | 374篇 |
2004年 | 340篇 |
2003年 | 311篇 |
2002年 | 247篇 |
2001年 | 97篇 |
2000年 | 71篇 |
1999年 | 73篇 |
1998年 | 46篇 |
1997年 | 42篇 |
1996年 | 31篇 |
1995年 | 18篇 |
1994年 | 20篇 |
1993年 | 18篇 |
1992年 | 31篇 |
1991年 | 30篇 |
1990年 | 27篇 |
1989年 | 28篇 |
1988年 | 27篇 |
1987年 | 25篇 |
1986年 | 20篇 |
1985年 | 23篇 |
1984年 | 21篇 |
1983年 | 10篇 |
1981年 | 15篇 |
1979年 | 20篇 |
1978年 | 17篇 |
1977年 | 8篇 |
1976年 | 10篇 |
1975年 | 11篇 |
1972年 | 6篇 |
1971年 | 10篇 |
1968年 | 8篇 |
排序方式: 共有7541条查询结果,搜索用时 78 毫秒
81.
The effect of crystallization process speed on the morphology of solution-processed methyl ammonium lead iodide (MAPbI3) thin films is investigated. Crystallization speed is controlled by varying the number of annealing steps, temperature, and resting time between steps. The resting period allows solvent-controlled growth (SCG) in which crystallization progresses slowly via an intermediate phase—during which solvents slowly evaporate away from the films. SCG results in fewer residues, fewer pinholes, and larger grain sizes. Consequently, thin-film transistors with SCG MAPbI3 exhibit smaller hysteresis in their current-voltage characteristics than those without, demonstrating the benefits of SCG toward hysteresis-free perovskite devices. 相似文献
82.
83.
84.
Vaibhav S. Keskar Shashir Wanjare Tukaram E. Jamale Dinesh Mahajan Sunil Y. Jawale Gwendolyn Fernandes 《Renal failure》2014,36(7):1129-1132
Fusarium is a filamentous opportunistic pathogenic fungus responsible for superficial as well as invasive infection in immunocompromized hosts. Net state of immunosuppression and cytomegalovirus (CMV) infection appear to predispose to this disease which is life-threatening when disseminated. Though infections with Fusarium have been widely described in hematological malignancies and hematopoietic stem cell transplant cases, they have been reported to be rare in solid organ transplant recipients, are often localized and carry a favorable prognosis. We here describe a rare case of subcutaneous non-invasive infection with Fusarium in a renal allograft recipient two and half years after transplantation. Patient had a previous history of CMV infection along with multiple other recurrent co-infections. Diagnosis was based on culture of tissue specimens yielding Fusarium species. The infection had a protracted course with persistence of lesions after treatment with voriconazole alone, requiring a combination of complete surgical excision and therapy with the anti-fungal drug. 相似文献
85.
Dual treatment with sofosbuvir plus ribavirin is as effective as triple therapy with pegylated interferon plus sofosbuvir plus ribavirin in predominant genotype 3 patients with chronic hepatitis C
下载免费PDF全文
![点击此处可从《Journal of gastroenterology and hepatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
86.
Arthi Sridhar B. M. Sunil Kumar Aarathi Rau A. T. K. Rau 《Indian journal of hematology & blood transfusion》2017,33(2):222-227
Dengue Fever (DF) may evolve into two life threatening forms—Dengue Hemorrhagic Fever (DHF) and Dengue Shock Syndrome (DSS). DHF is associated with increased vascular permeability and plasma leakage causing thrombocytopenia and loss of clotting factors into the third space and may result in bleeding initially due to thrombocytopenia and later due to disseminated intravascular coagulation (DIC), often as a terminal event. Prompt recognition and treatment of minor bleeds in DF children with incipient DIC with component therapy may be associated with improved survival while failure to do so is usually catastrophic. A sensitive marker for early DIC is the presence of D-dimer (DD) in the blood. To determine the correlation between the severity of thrombocytopenia and early DIC in children with DHF. The impact of additional factors like age and shock will also be evaluated. Case control prospective study of 60 DHF sero -positive children (1–15 years) with thrombocytopenia. After clinical evaluation they were divided into two equal groups based on the degree of thrombocytopenia (more than/less than 30,000/mm3). PT/APTT and DD levels were estimated in all children of both groups and statistical correlation was done. There was no significant difference in the DD levels between the two groups. However, children in either group, presenting with clinical features of shock and thrombocytopenia had significantly higher DD levels. Empirical component therapy in children with DHF based purely on their low platelet counts may not be justified. However, in DHF children with thrombocytopenia and features of shock, aggressive component therapy may prevent subsequent bleeding and may be justified. 相似文献
87.
88.
89.
90.
Lower motor neuron paralysis with extensive cord atrophy in parainfectious acute transverse myelitis
We describe a young patient of acute transverse myelitis (ATM) who developed true lower motor neuron (LMN) type flaccid paraplegia as a result of anterior horn cell damage in the region of cord inflammation that extended from conus upwards up to the D4 transverse level. We infer that flaccidity in acute phase of ATM is not always due to spinal shock and may represent true LMN paralysis particularly if the long segment myelits is severe and extending up to last spinal segment. 相似文献