全文获取类型
收费全文 | 187936篇 |
免费 | 1571篇 |
国内免费 | 59篇 |
专业分类
耳鼻咽喉 | 1286篇 |
儿科学 | 6926篇 |
妇产科学 | 3119篇 |
基础医学 | 18139篇 |
口腔科学 | 1802篇 |
临床医学 | 13170篇 |
内科学 | 33819篇 |
皮肤病学 | 1254篇 |
神经病学 | 17425篇 |
特种医学 | 9550篇 |
外科学 | 30728篇 |
综合类 | 2367篇 |
一般理论 | 2篇 |
预防医学 | 18384篇 |
眼科学 | 2922篇 |
药学 | 10464篇 |
中国医学 | 641篇 |
肿瘤学 | 17568篇 |
出版年
2023年 | 74篇 |
2022年 | 160篇 |
2021年 | 253篇 |
2020年 | 150篇 |
2019年 | 207篇 |
2018年 | 22110篇 |
2017年 | 17534篇 |
2016年 | 19717篇 |
2015年 | 1142篇 |
2014年 | 1112篇 |
2013年 | 1158篇 |
2012年 | 7580篇 |
2011年 | 21603篇 |
2010年 | 19183篇 |
2009年 | 11785篇 |
2008年 | 19976篇 |
2007年 | 22208篇 |
2006年 | 1101篇 |
2005年 | 2739篇 |
2004年 | 3926篇 |
2003年 | 4885篇 |
2002年 | 3007篇 |
2001年 | 694篇 |
2000年 | 816篇 |
1999年 | 545篇 |
1998年 | 380篇 |
1997年 | 366篇 |
1996年 | 274篇 |
1995年 | 223篇 |
1994年 | 185篇 |
1993年 | 138篇 |
1992年 | 284篇 |
1991年 | 341篇 |
1990年 | 380篇 |
1989年 | 323篇 |
1988年 | 300篇 |
1987年 | 260篇 |
1986年 | 240篇 |
1985年 | 251篇 |
1984年 | 190篇 |
1983年 | 136篇 |
1982年 | 104篇 |
1981年 | 79篇 |
1980年 | 105篇 |
1979年 | 130篇 |
1978年 | 91篇 |
1974年 | 76篇 |
1970年 | 79篇 |
1969年 | 71篇 |
1968年 | 72篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Takaharu Negoro Kanami Orihara Tomoko Irahara Hiroshi Nishiyama Kanae Hagiwara Risa Nishida Hiroki Takagi Kazue Satoh Yoshiki Yamamoto Shunichi Shimizu Tamio Hagiwara Masakazu Ishii Toshihiro Tanioka Yasuko Nakano Ken Takeda Isao Yoshimura Yoji Iikura Takashi Tobe 《Pediatric allergy and immunology》2006,17(8):583-590
Although many single nucleotide polymorphism (SNP) studies have reported an association of atopy, allergic diseases and total serum immunoglobulin E (IgE) levels, almost all of these studies sought risk factors for the onset of these allergic diseases. Furthermore, many studies have analyzed a single gene and hardly any have analyzed environmental factors. In these analyses, the results could be masked and the effects of other genes and environmental factors may be decreased. Here, we described the correlation between four genes [interleukin (IL)-4 (C-590T), IL-4 receptor (A1652G), FCER1B (G6842A) and STAT6 (G2964A)] in connection with IgE production; the role of IL-10 (C-627A) as a regulatory cytokine of allergy; and the severity of food allergy (FA) and atopic eczema (AE) in 220 Japanese allergic children. In addition to these SNPs, environmental factors, i.e., patient's attitude, indoor environment, and so on, were also investigated in this study. Our study was retrospective, and the correlation was analyzed by our defined clinical scores divided into three terms: worst symptoms, recent symptoms and general amelioration at the most recent examination during the disease course. Our results indicated that IL-10 AA, the genotype with lower IL-10 production, is associated with higher IgE levels in the serum (p < 0.0001, estimate; 0.912). Marginal liver abnormalities were observed in the subject group with both FA and AE (p < 0.1191, estimate; 0.1490). Our defined clinical scores enabled evaluation of various aspects of disease severity. Based on the scores, while no single SNP selected in this study determined severity, the combination of the SNP with laboratory data and environmental factors appeared to determine severity. 相似文献
2.
3.
Daisuke Kubota Chizuru Takishima Ken-ichi Ishii Takahiro Kawamura Tomoko Matsumoto Yasuhiro Itsui Eriko Okada Seishin Chin Shinya Oooka Kiichiro Tsuchiya Akihiro Araki Naoya Sakamoto Tatsuya Miyata Takanori Kanai Mamoru Watanabe 《Nihon Shokakibyo Gakkai zasshi》2006,103(9):1044-1049
A 23-year-old man was admitted for treatment of acute exacerbation of ileitis and perianal abscess caused by Crohn's disease. After incision and drainage of the abscess, coupled with antibiotic therapy, 6-mercaptopurine (6-MP) was commenced. His white blood cell (WBC) count on day 12 after initiation of 6-MP was not decreased. However, on day 24 he was re-admitted because of severe myelosuppression (WBC: 300/microl), which was complicated by the recurrence of the perianal abscess. Myelosuppression was prolonged and required the administration of granulocyte colony stimulating factor (G-CSF). G-CSF was continued for 17 days to achieve recovery of his WBC count to a normal level. 相似文献
4.
5.
6.
7.
8.
Debra L. Roter Richard M. Frankel Judith A. Hall David Sluyter 《Journal of general internal medicine》2006,21(1):28-34
Relationship-centered care reflects both knowing and feeling: the knowledge that physician and patient bring from their respective domains of expertise, and the physician’s and patient’s experience, expression, and perception of emotions during the medical encounter. These processes are conveyed and reciprocated in the care process through verbal and nonverbal communication. We suggest that the emotional context of care is especially related to nonverbal communication and that emotion-related communication skills, including sending and receiving nonverbal messages and emotional self-awareness, are critical elements of high-quality care. Although nonverbal behavior has received far less study than other care processes, the current review argues that it holds significance for the therapeutic relationship and influences important outcomes including satisfaction, adherence, and clinical outcomes of care. 相似文献
9.
Kanji Takeo Eric Virtudazo Misako Ohkusu Susumu Kawamoto Shoko Ito-Kuwa Sigeji Aoki 《Nippon Ishinkin Gakkai Zasshi》2006,47(4):257-262
In Cryptococcus neoformans the DNA content of cells having tiny buds varied rather widely, depending on growth phases and strains used. Typically, buds of C. neoformans emerged soon after initiation of DNA synthesis in the early exponential phase. However, bud emergence was delayed to G2 during transition to the stationary phase, and in the early stationary phase budding scarcely occurred, although roughly half of the cells completed DNA synthesis. The timing of budding in C. neoformans was shifted to later cell cycle points with progression of the growth phase of the culture. Similarly, a deficit in oxygen was demonstrated to delay the timing of budding, prolong the G2 phase and cause accumulation of cells after DNA synthesis, but before commitment to budding. The C. neoformans homologue of the main cell cycle control gene CDC28/Cdc2 was isolated using degenerate RT-PCR. The full-length coding region was then amplified using primers to target the regions around the start and stop codons. The gene was called CnCdk1 and was found to have high homologies to S. cerevisiae CDC28 and S. pombe cdc2. To determine its function, its ability to rescue S. cerevisiae cdc28-temperature sensitive mutants was tested. S. cerevisiae cdc28-4 and cdc28-1N strains transformed with the pYES2-CnCdk1 construct exhibited growth at the restrictive temperature. Results of the sequence analysis and the ability of CnCdk1 to complement the S. cerevisiae cdc28-ts mutations support its assumed role as the CDC28/cdc2 homologue in C. neoformans. 相似文献
10.