全文获取类型
收费全文 | 415篇 |
免费 | 17篇 |
国内免费 | 12篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 6篇 |
基础医学 | 84篇 |
口腔科学 | 1篇 |
临床医学 | 16篇 |
内科学 | 41篇 |
皮肤病学 | 37篇 |
神经病学 | 1篇 |
特种医学 | 2篇 |
外科学 | 10篇 |
综合类 | 57篇 |
预防医学 | 34篇 |
药学 | 123篇 |
中国医学 | 17篇 |
肿瘤学 | 14篇 |
出版年
2024年 | 4篇 |
2023年 | 6篇 |
2022年 | 8篇 |
2021年 | 14篇 |
2020年 | 6篇 |
2019年 | 5篇 |
2018年 | 11篇 |
2017年 | 11篇 |
2016年 | 14篇 |
2015年 | 9篇 |
2014年 | 13篇 |
2013年 | 31篇 |
2012年 | 28篇 |
2011年 | 24篇 |
2010年 | 26篇 |
2009年 | 19篇 |
2008年 | 21篇 |
2007年 | 27篇 |
2006年 | 27篇 |
2005年 | 18篇 |
2004年 | 13篇 |
2003年 | 8篇 |
2002年 | 13篇 |
2001年 | 8篇 |
2000年 | 11篇 |
1999年 | 9篇 |
1998年 | 7篇 |
1997年 | 5篇 |
1996年 | 4篇 |
1995年 | 8篇 |
1994年 | 5篇 |
1993年 | 6篇 |
1992年 | 7篇 |
1991年 | 2篇 |
1990年 | 5篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1987年 | 4篇 |
1985年 | 1篇 |
1981年 | 1篇 |
排序方式: 共有444条查询结果,搜索用时 0 毫秒
1.
Clinical characteristics and imaging manifestations of AIDS complicated with disseminated Penicillium marneffei infection 总被引:1,自引:0,他引:1
LU Pu-xuan ZHU Wen-ke ZHAN Neng-yong LIU Yan CHEN Xin-chun YE Ru-xin CAI Li-sheng ZHU Bo-ping 《中国介入影像与治疗学》2006,3(1):63-68
Objective To investigate the clinical characteristics and imaging manifestations of AIDS complicated with disseminated Penicillium marneffei (PM) infection. Methods A total of 12 patients with AIDS complicated with disseminated PM infection were collected and the symptoms, signs, laboratory examination results and image manifestations of these patients were analyzed retrospectively. Results (1) The diagnosis of PM infection in all the 12 cases were confirmed by peripheral blood culture. All the 12 cases (100%) had irregular fever (38-41℃) and enlarged lymph nodes, 8 cases (66%) had skin rashes; 8 cases (66%) had hepatomegaly; 9 cases (75%) had splenomegaly while 8 cases (66%) had anemia. (2) Imaging manifestation: Five cases manifested bilateral pulmonary disseminated miliary nodular shadows or lattice signs; 1 case showed enlarged hilar lymph node and 2 cases showed patchy shadow with pleuritis. One case presented sub-pleural curve line shadow at the posterior part of the right lower lung, and adhesion between the intestinal wall and intestinal mesentery in mass form in the abdomen by CT examination. Conclusion Patients suffering from AIDS (CD4 T lymphocytes 〈50/μ L) with impaired immunity might be susceptible to complication of disseminated PM infection, which presents mainly damage of multiple organs and symptoms such as fever; enlargement of liver, spleen and lymph nodes, as well as specific skin maculopapular rashes. Imaging manifestations in the lungs were revealed as miliary nodular shadows and lattice-like shadows. Intensified abdominal CT might reveal presence of several enlarged postperitoneal lymph nodes and intestinal adhesion in shape of "cakes". 相似文献
2.
Transformation of Penicillium chrysogenum using the Aspergillus nidulans amdS gene as a dominant selective marker 总被引:5,自引:0,他引:5
Summary The Aspergillus nidulans acetamidase gene (amdS) has been used to transform Penicillium chrysogenum at low frequency. Several transformants were tested and shown to be mitotically stable. Southern blot analysis indicated that transforming DNA had integrated into the chromosomal DNA, possibly at multiple sites. 相似文献
3.
A high frequency transformation system has been developed for Penicillium paxilli using pAN7-1. Up to 44% of the primary transformants were heterokaryons. Loss of hygromycin resistance was observed in primary transformants that were sub-cultured on non-selective media, but single spores of these primary transformants were mitotically stable on both selective and non-selective media. A molecular analysis of the transformants generated showed that 78% had single-site integrations, with half of these containing a single copy of pAN7-1. CHEF-gel electrophoresis showed that P. paxilli has at least six chromosomes with a total genome size of about 23.4 Mb. 相似文献
4.
As part of a study to investigate the pathways of plasmid pAN7-1 integration in Penicillium paxilli, a molecular analysis of 90 different integration events was carried out. Twenty out of forty five integration events analyzed
from transformants obtained without the addition of restriction enzyme to the transformation reaction mixture were single-copy
integrations, whereas the remaining 25 were tandem-repeat integrations. The addition of restriction enzyme resulted in a shift
in this ratio in favour of single-copy integration events. Analysis of the 33 tandem-repeat integration events showed that
the orientation of the plasmid copies was not random, with 88% organized as tandem head-to-tail arrays. De-phosphorylation
of linearized pAN7-1 did not affect the frequency with which multiple copies were integrated. This suggests that the predominant
mechanism for the generation of tandem repeats in P. paxilli is by homologous recombination rather than in vivo ligation of linearized plasmids.
Received: 11 March / 6 May 1997 相似文献
5.
Random amplified polymorphic DNAs (RAPDs) were used as a genetic marker system to characterize recombinant strains following the parasexual cycle of Penicillium roqueforti. After protoplast fusion and haploidization of diploid hybrids, segregants characterized by a reassortment of the parental genetic markers displayed specific RAPD fingerprints. The appearance or the loss of RAPD fragments demonstrate that these markers provide an efficient method to analyze recombination and to characterize somatic hybrids. 相似文献
6.
竹鼠马尔尼菲青霉菌感染的病理学研究 总被引:1,自引:0,他引:1
目的 研究马尔尼菲青霉菌感染竹鼠的组织病理学方法。方法 应用HE,Grocotte,免疫组化染色及电镜观察。结果 马尔尼菲青霉菌引起竹鼠各脏器的组织病理学改变为化脓性病变及肉芽肿性病变,病变轻微。结论 竹鼠为马尔尼菲青霉菌的天然储库,主要侵犯竹鼠的肺和单核巨噬细胞系统。 相似文献
7.
Equils O Deville JG Shapiro AM Sanchez CP 《Pediatric nephrology (Berlin, Germany)》1999,13(9):771-772
A 19-year-old female on chronic peritoneal dialysis developed acute peritonitis; multiple peritoneal fluid and catheter tip
cultures yielded Penicillium species. She promptly responded to catheter removal and intravenous amphotericin B, followed by oral fluconazole, without
further recurrences 1 year later. This is the first reported case of Penicillium peritonitis in the pediatric population. We review the microbiology and clinical spectrum of this disease, as well as the
few previous reported cases in adults.
Received: 2 November 1998 / Revised: 1 February 1999 / Accepted: 4 February 1999 相似文献
8.
9.
儿童马尔尼菲青霉菌感染2例临床和病理分析 总被引:3,自引:0,他引:3
目的 探讨儿童马尔尼菲青霉菌感染的临床特点和病理特征。方法 通过淋巴结活检和尸体解剖的肺、肝、脾、淋巴结的病理片观察真菌的形态 ;用酶免疫法和免疫印迹法检测病例 1患儿血清人类免疫缺陷病毒 (HIV)抗体 ;用流式细胞仪检测病例 1患儿的CD3、CD4、CD8和CD1 5 5 6。结果 例 1为艾滋病合并马尔尼菲青霉菌感染 ,例 2为播散型马尔尼菲青霉菌感染。例 1的CD4显著降低 ,HIV ELISA、免疫印迹法检测阳性 ,淋巴结活检可见马尔尼菲青霉菌的腊肠状细胞和桑葚小体。对例 2进行尸体解剖 ,肝、脾、淋巴结和双肺中均发现青霉菌的典型的腊肠状细胞和桑葚小体。结论 儿童马尔尼菲青霉菌感染是机会性感染 ,主要继发于先天性免疫缺陷和艾滋病 ,早期诊断、早期治疗对预后的影响很大。 相似文献
10.