全文获取类型
收费全文 | 5217篇 |
免费 | 352篇 |
国内免费 | 18篇 |
专业分类
耳鼻咽喉 | 88篇 |
儿科学 | 195篇 |
妇产科学 | 60篇 |
基础医学 | 526篇 |
口腔科学 | 97篇 |
临床医学 | 414篇 |
内科学 | 1012篇 |
皮肤病学 | 145篇 |
神经病学 | 319篇 |
特种医学 | 208篇 |
外国民族医学 | 1篇 |
外科学 | 889篇 |
综合类 | 131篇 |
一般理论 | 6篇 |
预防医学 | 311篇 |
眼科学 | 146篇 |
药学 | 626篇 |
中国医学 | 40篇 |
肿瘤学 | 373篇 |
出版年
2023年 | 44篇 |
2022年 | 157篇 |
2021年 | 201篇 |
2020年 | 108篇 |
2019年 | 142篇 |
2018年 | 175篇 |
2017年 | 103篇 |
2016年 | 147篇 |
2015年 | 143篇 |
2014年 | 186篇 |
2013年 | 250篇 |
2012年 | 381篇 |
2011年 | 352篇 |
2010年 | 204篇 |
2009年 | 177篇 |
2008年 | 296篇 |
2007年 | 283篇 |
2006年 | 270篇 |
2005年 | 245篇 |
2004年 | 215篇 |
2003年 | 207篇 |
2002年 | 162篇 |
2001年 | 129篇 |
2000年 | 111篇 |
1999年 | 101篇 |
1998年 | 34篇 |
1997年 | 32篇 |
1996年 | 32篇 |
1995年 | 33篇 |
1994年 | 27篇 |
1993年 | 31篇 |
1992年 | 70篇 |
1991年 | 66篇 |
1990年 | 48篇 |
1989年 | 43篇 |
1988年 | 47篇 |
1987年 | 34篇 |
1986年 | 32篇 |
1985年 | 46篇 |
1984年 | 38篇 |
1983年 | 22篇 |
1982年 | 12篇 |
1981年 | 11篇 |
1979年 | 21篇 |
1978年 | 10篇 |
1974年 | 9篇 |
1973年 | 8篇 |
1972年 | 10篇 |
1971年 | 12篇 |
1968年 | 9篇 |
排序方式: 共有5587条查询结果,搜索用时 15 毫秒
31.
32.
AIM OF THE STUDY: The present study was aimed at documentation of botanical anthelmintics used in the traditional veterinary practices in Sahiwal district of Punjab, Pakistan. MATERIALS AND METHODS: In rapid rural appraisal, 331 traditional veterinary healers (TVH) were identified as key respondents in the study area followed by participatory rural appraisal for data collection using a well-structured questionnaire. Information was collected through interviews, focused group discussions and field visits over a period of 2 years. RESULTS: A total of 49 traditional recipes, with 41 plant species representing 39 genera and 27 families, were recorded for the treatment of helminthosis in animals. Most frequently used plants (>/=5 times) were Brassica campestris L. and Mallotus philippinensis (Lam.) Muell.-Arg. and most frequently used families (>/=5 times) were Brassicaceae, Euphorbiaceae and Solanaceae. Most frequently used part of the plant was leaves (n=10) followed in order by seeds (n=9), whole fruit (n=5), aerial parts and whole plant (n=4), fruit (n=3), bulb (n=2) and bark, rhizome, stem, stem plus root and twigs (n=1). Five recipes out of 49 (10.2%) contained more than one plant species and rest 44 (89.8%) contained single plant species. CONCLUSIONS: Twenty out of 41 plants (48.78%) are reported for the first time for their traditional use as anthelmintics in Pakistan. Further studies on pharmacokinetics using scientific procedures may prove these plants as promising candidates for their future use as anthelmintics. 相似文献
33.
Abhinandan Kumar Vatika Soni Pardeep Singh Aftab Aslam Parwaz Khan Mohammed Nazim Satyabrata Mohapatra Vipin Saini Pankaj Raizada Chaudhery Mustansar Hussain Mohamed Shaban Hadi M. Marwani Abdullah M. Asiri 《RSC advances》2022,12(22):13609
The selection of a facile, eco-friendly, and effective methodology is the need of the hour for efficient curing of the COVID-19 virus in air, water, and many food products. Recently, semiconductor-based photocatalytic methodologies have provided promising, green, and sustainable approaches to battle against viral activation via the oxidative capabilities of various photocatalysts with excellent performance under moderate conditions and negligible by-products generation as well. Considering this, recent advances in photocatalysis for combating the spread of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are inclusively highlighted. Starting from the origin to the introduction of the coronavirus, the significant potential of photocatalysis against viral prevention and -disinfection is discussed thoroughly. Various photocatalytic material-based systems including metal-oxides, metal-free and advanced 2D materials (MXenes, MOFs and COFs) are systematically examined to understand the mechanistic insights of virus-disinfection in the human body to fight against COVID-19 disease. Also, a roadmap toward sustainable solutions for ongoing COVID-19 contagion is also presented. Finally, the challenges in this field and future perspectives are comprehensively discussed involving the bottlenecks of current photocatalytic systems along with potential recommendations to deal with upcoming pandemic situations in the future.Photocatalysts are green, eco-friendly, clean and sustainable and could be a solution to combat COVID-19 because of potential features of various types of metal oxides against viral inactivation via the generation of reactive oxidative species. 相似文献
34.
Omari Christie Kavya Mirchia Rajiv Mangla Ali Hussain Abdelmohsen Radwan Hussien 《Radiology Case Reports》2022,17(7):2441
We present a unique case of diffusely extensive Chronic Inflammatory Demyelinating Polyneuropathy (CIDP). Typically affecting the peripheral nervous system and manifesting with muscle weakness, breakdown or paresthesia, we present a case that additionally demonstrates; cranial nerve involvement, central nervous system parenchymal lesions, and chronic osseous remodeling of the nerve tracts. Cranial nerve involvement to this extent has only been described in one other case report to our knowledge. Central nervous system parenchymal lesions are extremely rare in CIDP and no discrete discussion about osseous remodeling has been presented, thus far, in the literature. The findings illustrated in this case may spur further understanding of imaging characteristics most associated with chronic CIDP disease and care measures that could help stratify patients most at risk for severe symptomologies. 相似文献
35.
36.
37.
38.
We present our experience and observations in the management of upper limb arterial injury in a tertiary trauma care centre of a University Hospital in a developing country from January 2000 to January 2002. In this retrospective study, we had treated 27 patients (identified from trauma register) with upper extremity vascular injuries. Clinical examination and Doppler pressure studies were our prime modalities of investigation. Angiography was not employed. Our immediate limb salvage rate was 100%. Two patients developed complications during a mean follow up of 70 days with one requiring amputation. We thereby emphasise the fact that good results can be obtained by thorough clinical examination and Doppler evaluation and prompt surgery without the need for angiography in upper limb vascular trauma. 相似文献
39.
40.