全文获取类型
收费全文 | 241篇 |
免费 | 20篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 9篇 |
基础医学 | 26篇 |
口腔科学 | 3篇 |
临床医学 | 22篇 |
内科学 | 27篇 |
皮肤病学 | 1篇 |
神经病学 | 14篇 |
特种医学 | 4篇 |
外科学 | 27篇 |
综合类 | 50篇 |
预防医学 | 14篇 |
药学 | 24篇 |
2篇 | |
中国医学 | 24篇 |
肿瘤学 | 19篇 |
出版年
2023年 | 5篇 |
2022年 | 11篇 |
2021年 | 13篇 |
2020年 | 6篇 |
2019年 | 11篇 |
2018年 | 2篇 |
2017年 | 2篇 |
2016年 | 4篇 |
2015年 | 11篇 |
2014年 | 21篇 |
2013年 | 15篇 |
2012年 | 12篇 |
2011年 | 22篇 |
2010年 | 9篇 |
2009年 | 9篇 |
2008年 | 13篇 |
2007年 | 6篇 |
2006年 | 13篇 |
2005年 | 9篇 |
2004年 | 13篇 |
2003年 | 12篇 |
2002年 | 8篇 |
2001年 | 17篇 |
2000年 | 7篇 |
1999年 | 8篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1984年 | 1篇 |
1980年 | 1篇 |
排序方式: 共有269条查询结果,搜索用时 31 毫秒
41.
42.
目的 探讨细胞分裂周期蛋白7(CDC7)、微小染色体维持蛋白4 (MCM4)在宫颈癌及癌前病变中的表达及临床意义。方法 利用免疫组织化学检测CDC7、 MCM4蛋白在30例正常宫颈、30例宫颈上皮内瘤变I级(CINⅠ)、25例CINⅡ~Ⅲ、50例宫颈癌组织标本中的表达,与传统细胞增殖标记物Ki67比较,分析其与宫颈癌临床病理特征的关系。结果 (1)CDC7在正常宫颈、CINⅠ、CINⅡ~Ⅲ及宫颈癌组织中的阳性表达率分别为6.7%、26.7%、56.0%和78.0%,表达水平与病变程度呈中度正相关(rs=0.625),差异有统计学意义(P<0.001); MCM4在4组中的阳性表达率分别为26.7%、36.7%、64.0%和88.0%,表达水平与病变程度呈中度正相关(rs=0.680),差异有统计学意义(P<0.001);Ki67在4组中阳性表达率分别为10.0%、26.7%、60.0%和84.0%,表达水平与病变程度呈中度正相关(rs=0.660),差异有统计学意义(P<0.001);(2)CDC7蛋白... 相似文献
43.
44.
45.
目的 评价低场强永磁型MR胆胰管造影的临床应用价值。方法 应用日立AIRIS 0 .3T永磁型磁共振机 ,用FSE序列或FI序列扫描获得重T2 像经 3DMIP处理获得胆胰管重建图像。共进行 1 5例正常人 ,1 5例病例的检查。结果 正常组可显示左右肝管及肝总管、胆总管 ,胆囊等 ,肝管、胆管最大直径小于 1 .0cm。异常组可清楚显示胆胰管梗阻扩张的形态 ,扩张肝管、胆管的直径大于 1 .0cm ,敏感性 1 0 0 % ,定位准确性 93.3% ,综合诊断正确性高。结论 低场强永磁型磁共振MRCP与中高场强的超导型磁共振MRCP同样具有很好的造影效果和同样的临床应用价值。 相似文献
46.
Xiangmin Tong Xuewu Zhang Jian Fan Yin Tong Shuangshuang Li Jie Jin Hangping Yao 《Cancer biology & therapy》2013,14(4):370-377
Background: Aberrant expression of the RON receptor tyrosine kinase is associated with tumor progression and carcinogenesis. The aims of this study were to determine the role and functional mechanisms of RON in Burkitt lymphoma (BL) and to document its potential as a therapeutic target. Methods: RON expression was determined in BL cell lines by western blot analysis and examined in human lymphoma specimens by both western blotting and immunohistochemistry. The correlation between RON expression and Epstein-Barr virus (EBV) infection was investigated. Raji cells were treated with the Zt/f2 anti-RON mAb and cell viability, colony formation, apoptosis and cell cycle arrest were measured in vitro using cell proliferation assays, colony-forming assays and flow cytometry. Downregulation of RON by Zt/f2 was validated in mice bearing Raji cell xenografts.Results: Immunohistostaining showed a high frequency of RON+ cells in BL tissues and RON expression strongly correlated with EBV positivity. RON downregulation significantly decreased cell proliferation and colony formation via promotion of apoptosis and cell cycle arrest in Raji cells. The in vivo study showed that RON knockdown inhibits the tumorigenic potential of Raji cells in nude mice.Conclusions: RON acts as an oncogene in the carcinogenesis and progression of BL and is therefore a potential target for therapeutic intervention. 相似文献
47.
48.
目的探讨儿童青少年脑外伤后4~10年远期器质性精神障碍的发生率及其与成年人的差异。方法对深圳市39家医院的脑外伤病例进行系统抽样,采用自编的《颅脑外伤后精神障碍状况调查手册》对抽样的105例脑外伤儿童青少年患者的精神障碍进行随访调查,并与同期调查的570例成人脑外伤患者进行比较。由二名副主任及以上职称的精神科医师面检筛查阳性者,并按照CCMD-3脑外伤所致精神障碍的诊断标准明确诊断。结果 20.0%(21/105)儿童青少年在调查时符合脑外伤所致精神障碍的诊断,包括:行为(人格)改变12.38%(13/105),智能损害8.57%(9/105),脑外伤后综合征6.67%(7/105),抑郁综合征1.90%(2/105)。重型脑外伤所致精神障碍发生率显著高于中型和轻型(2=8.08,P0.05;2=20.43,P0.01)。儿童青少年组颅脑外伤所致远期精神障碍总发生率明显较成人组低(2=6.49,P0.05),主要是智能损害和抑郁综合征发生率低于成人组(2=6.84,P0.05;2=6.02,P0.05)。结论儿童青少年脑外伤对精神损伤的远期影响较成人好。 相似文献
49.
探究D-β-羟基丁酸(DβHB)对大鼠急性心肌梗死(AMI)的作用及其可能的作用机制。方法 40只SPF级SD大鼠随机分为对照组、心梗组、DβHB组和阳性对照组,每组10只。除对照组外,其余组通过结扎冠状动脉左前降支近端建立AMI大鼠模型。DβHB组大鼠腹腔注射DβHB 100 mg·kg-1·d-1,阳性对照组大鼠腹腔注射倍他乐克12mg·kg-1·d-1,对照组和心梗组大鼠注射等量生理盐水,持续给药3周。超声心动图检测心功能;HE染色检测心脏病理学变化;TTC染色检测心肌梗死面积;ELISA试剂盒检测LDH和CK-MB活性;TUNEL染色检测心肌细胞凋亡;Western blot检测凋亡、Notch1/Hes1通路和内质网应激相关蛋白水平。结果 与对照组相比,心梗组大鼠心肌结构紊乱,存在明显炎性细胞浸润和间质水肿,心功能明显降低,心肌梗死面积、LDH活性、CK-MB活性、心肌细胞凋亡率、Bax、p-PERK/PERK、p-eIF2α/eIF2α、ATF4和CHOP蛋白表达明显升高(均P<0.05),Bcl-2蛋白水平明显降低(P<0.05),Notch1、NICD和Hes1蛋白水平差异无统计学意义(P>0.05);与心梗组相比,DβHB组和阳性对照组大鼠心肌病理学变化有明显改善,心功能明显提升,心肌梗死面积、LDH活性、CK-MB活性、心肌细胞凋亡率、Bax、p-PERK/PERK、p-eIF2α/eIF2α、ATF4和CHOP蛋白水平明显降低(P<0.05),Bcl-2、Notch1、NICD和Hes1蛋白水平明显升高(P<0.05)。结论 DβHB可能通过激活Notch1/Hes1通路和抑制内质网应激改善大鼠急性心肌梗死。 相似文献
50.
Zhiwei Xiao Zhiqiang Chen Rui Han Liming Lu Zeyun Li Jietao Lin Leihao Hu Xuewu Huang Lizhu Lin 《Medicine》2021,100(18)
Objective:We conducted this study to evaluate the efficacy and safety of traditional Chinese medicine (TCM) in advanced non-small cell lung cancer (NSCLC) patients who underwent chemotherapy.Design:This was a prospective, open-label, randomized controlled trial. NSCLC patients at stage IIIA, IIIB, or IV were randomly assigned to either TCM plus chemotherapy or chemotherapy alone. The comprehensive TCM treatment consisted of Kang Ai injection, herbal decoction, and Zhenqifuzheng capsules. The primary endpoint was quality of life (QOL) measured by the Functional Assessment of Cancer Therapy-Lung version 4.0. The secondary endpoints were chemotherapy completion rate, tumor response, and adverse events. All assessments were done at baseline, the third week, and the sixth week.Results:Thirty-nine participants were randomly assigned to the treatment group and 36 to the control group. The QOL scores were significantly improved in the treatment group compared with those of the control group in social well-being (cycle 1, P = .048; cycle 2, P = .015), emotional well-being (cycle 1, P = .047; cycle 2, P = 4.29E-05), and functional well-being (cycle 1, P = .030; cycle 2, P = .003), while the QOL scores in the above 3 domains declined in the control group (P < .05). Both groups had a decline in the physical well-being score (cycle 1, P = .042; cycle 2, P = .017) and lung cancer symptom score (cycle 1, P = .001; cycle 2, P = .001) after 2 courses of intervention. The deterioration in physical well-being and lung cancer symptoms was noticeably smaller in the treatment group (P < .05). There were significant differences between the 2 groups in social well-being, emotional well-being, functional well-being, lung cancer symptom domain, and the total score (P < .05). Patients in the treatment group had a significantly lower incidence of platelet reduction than the control group (P = .028) after 2 cycles of treatment. No significant difference in nonhematological adverse events (AEs) was observed.Conclusion:This study illustrated that comprehensive TCM treatment could promote the QOL of NSCLC patients, alleviate symptoms, and reduce the AEs caused by chemotherapy, verifying the synergistic and attenuating effects of TCM in NSCLC patients undergoing chemotherapy.Trial registration:Chinese Clinical Trial Registry (www.chictr.org.cn): ChiCTR-TRC-13003637 相似文献