全文获取类型
收费全文 | 21435篇 |
免费 | 1951篇 |
国内免费 | 1348篇 |
出版年
2024年 | 14篇 |
2023年 | 203篇 |
2022年 | 275篇 |
2021年 | 814篇 |
2020年 | 631篇 |
2019年 | 801篇 |
2018年 | 852篇 |
2017年 | 634篇 |
2016年 | 941篇 |
2015年 | 1413篇 |
2014年 | 1639篇 |
2013年 | 1710篇 |
2012年 | 2024篇 |
2011年 | 1932篇 |
2010年 | 1146篇 |
2009年 | 1092篇 |
2008年 | 1257篇 |
2007年 | 1149篇 |
2006年 | 1042篇 |
2005年 | 883篇 |
2004年 | 860篇 |
2003年 | 686篇 |
2002年 | 549篇 |
2001年 | 361篇 |
2000年 | 289篇 |
1999年 | 251篇 |
1998年 | 187篇 |
1997年 | 147篇 |
1996年 | 143篇 |
1995年 | 118篇 |
1994年 | 109篇 |
1993年 | 63篇 |
1992年 | 88篇 |
1991年 | 70篇 |
1990年 | 80篇 |
1989年 | 62篇 |
1988年 | 44篇 |
1987年 | 45篇 |
1986年 | 27篇 |
1985年 | 27篇 |
1984年 | 33篇 |
1983年 | 13篇 |
1982年 | 10篇 |
1981年 | 7篇 |
1980年 | 2篇 |
1978年 | 2篇 |
1967年 | 2篇 |
1965年 | 1篇 |
1964年 | 1篇 |
1962年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Bong Jin Kim Kyung Seob Song Hyun-Hee Kong Hee-Jae Cha Meesun Ock 《The Korean journal of parasitology》2014,52(1):85-87
We encountered a patient with heavy Hymenolepis nana infection. The patient was a 44-year-old Korean man who had suffered from chronic hepatitis (type B) for 15 years. A large number of H. nana adult worms were found during colonoscopy that was performed as a part of routine health screening. The parasites were scattered throughout the colon, as well as in the terminal ileum, although the patient was immunocompetent. Based on this study, colonoscopy may be helpful for diagnosis of asymptomatic H. nana infections. 相似文献
2.
3.
4.
5.
Abstract Two new species of water mites, Pionopsis (s.s.)longicosta sp. nov. and Pionopsis (s.s.) zhaoi sp. nov. are described in the present paper. This is the first record of the genus of the subfamily Tiphyinae in the family Pionidae from China. 相似文献
6.
7.
8.
Eun Jin Park Joon Young Song Min Ju Choi Ji Ho Jeon Jah-yeon Choi Tae Un Yang Kyung Wook Hong Ji Yun Noh Hee Jin Cheong Woo Joo Kim 《The Korean journal of parasitology》2014,52(4):425-428
A 45-year-old-male who had underlying ulcerative colitis and presented with fever and dry cough. Initially, the patient was considered to have invasive aspergillosis due to a positive galactomannan assay. He was treated with amphotericin B followed by voriconazole. Nevertheless, the patient deteriorated clinically and radiographically. The lung biopsy revealed eosinophilic pneumonia, and ELISA for Toxocara antigen was positive, leading to a diagnosis of pulmonary toxocariasis. After a 10-day treatment course with albendazole and adjunctive steroids, the patient recovered completely without any sequelae. Pulmonary toxocariasis may be considered in patients with subacute or chronic pneumonia unresponsive to antibiotic agents, particularly in cases with eosinophilia. 相似文献
9.
10.
Ying Jin Dan Long Juan Li Ruichao Yu Yueming Song Jie Fang Xi Yang Shu Zhou Shishu Huang Zhihe Zhao 《Journal of cellular physiology》2019,234(9):14838-14851
Bone and tooth, fundamental parts of the craniofacial skeleton, are anatomically and developmentally interconnected structures. Notably, pathological processes in these tissues underwent together and progressed in multilevels. Extracellular vesicles (EVs) are cell-released small organelles and transfer proteins and genetic information into cells and tissues. Although EVs have been identified in bone and tooth, particularly EVs have been identified in the bone formation and resorption, the concrete roles of EVs in bone and tooth development and diseases remain elusive. As such, we review the recent progress of EVs in bone and tooth to highlight the novel findings of EVs in cellular communication, tissue homeostasis, and interventions. This will enhance our comprehension on the skeletal biology and shed new light on the modulation of skeletal disorders and the potential of genetic treatment. 相似文献