全文获取类型
收费全文 | 24224篇 |
免费 | 2156篇 |
国内免费 | 1315篇 |
出版年
2024年 | 14篇 |
2023年 | 208篇 |
2022年 | 268篇 |
2021年 | 775篇 |
2020年 | 665篇 |
2019年 | 838篇 |
2018年 | 930篇 |
2017年 | 684篇 |
2016年 | 1051篇 |
2015年 | 1566篇 |
2014年 | 1825篇 |
2013年 | 1922篇 |
2012年 | 2278篇 |
2011年 | 2218篇 |
2010年 | 1303篇 |
2009年 | 1235篇 |
2008年 | 1425篇 |
2007年 | 1332篇 |
2006年 | 1162篇 |
2005年 | 1000篇 |
2004年 | 965篇 |
2003年 | 773篇 |
2002年 | 638篇 |
2001年 | 435篇 |
2000年 | 352篇 |
1999年 | 296篇 |
1998年 | 216篇 |
1997年 | 176篇 |
1996年 | 159篇 |
1995年 | 134篇 |
1994年 | 122篇 |
1993年 | 75篇 |
1992年 | 100篇 |
1991年 | 84篇 |
1990年 | 95篇 |
1989年 | 81篇 |
1988年 | 59篇 |
1987年 | 52篇 |
1986年 | 34篇 |
1985年 | 31篇 |
1984年 | 43篇 |
1983年 | 17篇 |
1982年 | 11篇 |
1981年 | 10篇 |
1980年 | 3篇 |
1979年 | 6篇 |
1978年 | 4篇 |
1972年 | 7篇 |
1971年 | 3篇 |
1967年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 31 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.
Young-Ok Kim Sooyeon Park Hyangmi Kim Doo-Sang Park Bo-Hye Nam Dong-Gyun Kim Jung-Hoon Yoon 《Antonie van Leeuwenhoek》2014,105(5):881-889
A Gram-negative, non-motile and rod-shaped bacterial strain, designated RA2-3T, was isolated from a sea squirt (Halocynthia roretzi) collected from the South Sea, Korea, and its taxonomic position was investigated by using a polyphasic approach. Strain RA2-3T was observed to grow optimally at 25 °C, at pH 7.0–7.5 and in the presence of 2 % (w/v) NaCl. Strain RA2-3T exhibited the highest 16S rRNA gene sequence similarity values to the type strains of Litoreibacter meonggei (95.7 %), Planktotalea frisia (95.6 %), Thalassobius gelatinovorus (95.5 %) and Pelagicola litoralis (95.4 %). A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences revealed that strain RA2-3T clustered with the type strains of Planktotalea frisia, Pelagicola litoralis, Pacificibacter maritimus and Roseovarius marinus. Strain RA2-3T was found to contain Q-10 as the predominant ubiquinone and C18:1 ω7c as the major fatty acid. The major polar lipids detected in strain RA2-3T were phosphatidylcholine, phosphatidylglycerol, one unidentified aminolipid and one unidentified lipid. The DNA G+C content of strain RA2-3T was 52.9 mol%. On the basis of the phylogenetic, chemotaxonomic and phenotypic properties, strain RA2-3T is considered to represent a new genus and species within the family Rhodobacteraceae, for which the name Halocynthiibacter namhaensis gen. nov., sp. nov. is proposed. The type strain of H. namhaensis is RA2-3T (=KCTC 32362T=NBRC 109999T). 相似文献
3.
4.
5.
6.
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
7.
8.
9.
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
10.