全文获取类型
收费全文 | 1365630篇 |
免费 | 102125篇 |
国内免费 | 4346篇 |
专业分类
耳鼻咽喉 | 17163篇 |
儿科学 | 44762篇 |
妇产科学 | 37115篇 |
基础医学 | 201413篇 |
口腔科学 | 36306篇 |
临床医学 | 135010篇 |
内科学 | 263097篇 |
皮肤病学 | 26684篇 |
神经病学 | 114726篇 |
特种医学 | 48815篇 |
外国民族医学 | 367篇 |
外科学 | 186739篇 |
综合类 | 29050篇 |
现状与发展 | 1篇 |
一般理论 | 508篇 |
预防医学 | 118945篇 |
眼科学 | 29301篇 |
药学 | 100575篇 |
6篇 | |
中国医学 | 3203篇 |
肿瘤学 | 78315篇 |
出版年
2021年 | 11550篇 |
2019年 | 12361篇 |
2018年 | 17168篇 |
2017年 | 12910篇 |
2016年 | 13922篇 |
2015年 | 15931篇 |
2014年 | 21846篇 |
2013年 | 33703篇 |
2012年 | 46589篇 |
2011年 | 49391篇 |
2010年 | 28446篇 |
2009年 | 26172篇 |
2008年 | 44857篇 |
2007年 | 47223篇 |
2006年 | 47303篇 |
2005年 | 45662篇 |
2004年 | 43480篇 |
2003年 | 41224篇 |
2002年 | 39973篇 |
2001年 | 61025篇 |
2000年 | 62684篇 |
1999年 | 52476篇 |
1998年 | 14912篇 |
1997年 | 13528篇 |
1996年 | 13331篇 |
1995年 | 12618篇 |
1994年 | 11804篇 |
1993年 | 11084篇 |
1992年 | 41673篇 |
1991年 | 40850篇 |
1990年 | 39522篇 |
1989年 | 37420篇 |
1988年 | 34659篇 |
1987年 | 33758篇 |
1986年 | 32225篇 |
1985年 | 30706篇 |
1984年 | 23107篇 |
1983年 | 19651篇 |
1982年 | 11827篇 |
1979年 | 20835篇 |
1978年 | 14839篇 |
1977年 | 12098篇 |
1976年 | 11895篇 |
1975年 | 12132篇 |
1974年 | 14815篇 |
1973年 | 14479篇 |
1972年 | 13368篇 |
1971年 | 12425篇 |
1970年 | 11495篇 |
1969年 | 10417篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
Molecular cloning and complete nucleotide sequence of galinsoga mosaic virus genomic RNA 总被引:1,自引:0,他引:1
Summary. The complete genomic sequence of galinsoga mosaic virus (GaMV) was determined. The genome consists of 3 803 nucleotides and
has five open reading frames (ORFs). The 5′ ORF (ORF 1) encodes a protein with predicted molecular mass of 23 kDa and readthrough
of its amber stop codon probably yields a 82 kDa protein (ORF 2). ORFs 3 and 4 encode two polypeptides with molecular masses
of 8 and 7 kDa, respectively. ORF 5 encodes the 36 kDa capsid protein. Amino acid sequence comparisons revealed that the nonstructural
proteins encoded by ORFs 1, 3, and 4 were more similar to the corresponding gene products of tobacco necrosis virus, strain
A, than to those of carmoviruses. Conversely, the coat protein was more similar to that of tombusviruses. The readthrough
region of the viral replicase (ORF 2) had high sequence homology with that of carmo-, tombus-, and necroviruses. Computer
analysis of the protein encoded by ORF 1 as well as of the corresponding product of turnip crinkle (TCV) and melon necrotic
spot (MNSV) carmoviruses revealed the presence of a sequence with local hydrophobicity and hydrophobic moment characteristic
of mitochondrial targeting sequence which may explain the origin of the carmovirus-induced multivesicular bodies from mitochondria.
Accepted August 25, 1997 Received June 18, 1997 相似文献
993.
994.
Abstract: We describe the use of restriction analysis on PCR-amplified DNA for detecting all B*27 subtypes except B*2710 and B*2711 (i.e. from B*2701 to B*2709). After detecting B*27 by Sty I, double digestions consisting of Sty I plus another informative enzyme led to subtype assignment. We used mismatched primers to create restriction sites when necessary. The method avoids group-specific amplifications and other laborious optimization procedures. It was successfully tested on a panel of well characterized cell lines covering different B*27 subtypes. Then, we studied a group of 57 ankylosing spondyiitis patients and 746 controls from the south of Spain. B*27 showed a very strong association with the disease (OR=211.27, P=\0˜7). B*2702 and B*2705 distribution in controls (20% and 77.1%, respectively) differed from previously reported data in the Spanish population. We unexpectedly found the B*2707 allele in our population (one control). 相似文献
995.
Movement detection at the human big toe 总被引:1,自引:1,他引:0
996.
997.
998.
Resection of the adrenal glands precludes participation in many immunotherapy protocols for metastatic renal cell carcinoma. We performed radical nephrectomy with adrenalectomy and contralateral partial adrenalectomy, including adrenal vein ligation for a 4 cm. hilar metastasis without perioperative complications or local recurrence after 30 months. Adrenal function, measured by cosyntropin stimulation tests 6 weeks and 10 months postoperatively, was normal. Partial adrenalectomy with preservation of adrenal function is possible. 相似文献
999.
1000.
Peter L. Forster Frank B. Schoenfeld Charles R. Marmar Ariel Janna Lang 《Journal of traumatic stress》1995,8(1):143-149
Irritability is often a problem for patients with Post-Traumatic Stress Disorder (PTSD). We describe two cases that illustrate the use of lithium in the treatment of veterans with PTSD who complained of serious problems with irritability or angry outbursts. These cases are discussed in the context of evidence that lithium may be useful in other patients with disorders of impulse control. The evidence linking disorders of anger and impulse control to a dysregulation in neurotransmitter regulation, particularly in serotonergic pathways, supports a psychopharmacologic approach to treatment. These findings should lead to further study of the role of lithium in the treatment of this symptom complex in patients with PTSD. 相似文献