全文获取类型
收费全文 | 12205篇 |
免费 | 1042篇 |
国内免费 | 211篇 |
专业分类
耳鼻咽喉 | 40篇 |
儿科学 | 276篇 |
妇产科学 | 199篇 |
基础医学 | 1817篇 |
口腔科学 | 139篇 |
临床医学 | 809篇 |
内科学 | 2224篇 |
皮肤病学 | 261篇 |
神经病学 | 1062篇 |
特种医学 | 374篇 |
外国民族医学 | 2篇 |
外科学 | 1301篇 |
综合类 | 927篇 |
现状与发展 | 1篇 |
一般理论 | 1篇 |
预防医学 | 689篇 |
眼科学 | 192篇 |
药学 | 1523篇 |
2篇 | |
中国医学 | 511篇 |
肿瘤学 | 1108篇 |
出版年
2024年 | 26篇 |
2023年 | 139篇 |
2022年 | 276篇 |
2021年 | 303篇 |
2020年 | 287篇 |
2019年 | 741篇 |
2018年 | 831篇 |
2017年 | 396篇 |
2016年 | 316篇 |
2015年 | 323篇 |
2014年 | 558篇 |
2013年 | 617篇 |
2012年 | 510篇 |
2011年 | 576篇 |
2010年 | 425篇 |
2009年 | 432篇 |
2008年 | 381篇 |
2007年 | 365篇 |
2006年 | 309篇 |
2005年 | 287篇 |
2004年 | 277篇 |
2003年 | 210篇 |
2002年 | 225篇 |
2001年 | 216篇 |
2000年 | 197篇 |
1999年 | 168篇 |
1998年 | 123篇 |
1997年 | 150篇 |
1996年 | 122篇 |
1995年 | 86篇 |
1994年 | 89篇 |
1993年 | 70篇 |
1992年 | 57篇 |
1991年 | 47篇 |
1990年 | 44篇 |
1989年 | 39篇 |
1986年 | 26篇 |
1985年 | 277篇 |
1984年 | 414篇 |
1983年 | 299篇 |
1982年 | 297篇 |
1981年 | 313篇 |
1980年 | 313篇 |
1979年 | 222篇 |
1978年 | 185篇 |
1977年 | 151篇 |
1976年 | 189篇 |
1975年 | 196篇 |
1974年 | 151篇 |
1973年 | 115篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
盖洛普Q12对护士工作满意度的影响及应用研究 总被引:10,自引:0,他引:10
目的探讨什么样的工作环境最能激发护士的才干和热情以及盖洛普Q12运用在护理人性化管理中对营造一个良好的基层工作环境的作用。方法选用盖洛普Q12调查表,随机抽查某院16个病区的350名护士,采用自设的病人满意度调查表分别调查了这些病区的病人满意度。结果在333份有效问卷中对盖洛普Q12选择“非常满意”的占总选项的39.21%,选择“比较满意”占总选项的41.39%,选择“较不满意”占总选项的5.86%,选择“不满意”占总选项的13.49%,护士满意度和病人满意度有正的直线相关关系,随着护士满意度的提高,病人满意度增高。结论盖洛普Q12运用在护理人性管理中对营造一个积极、高效的基层工作环境是非常有效的,它们是管理中的12个重点。护士长如果能悉心关注这12个方面,使护士们对所有12个问题都作出肯定的回答,那么护士工作的满意度、患者满意度及医院的效益将会得到有效的提高。 相似文献
62.
Shanshan Wang Wei Wu Ying Liu Chunhui Wang Qing Xu Qianzhou Lv Rongqin Huang Xiaoyu Li 《Drug delivery》2022,29(1):1951
Ovarian cancer remains one of serious hazards to human health due to many drawbacks of existing available treatment options. In this study, a multifunctional chemo-thermo combined therapy nanoplatform (OMCNPID) was successfully prepared, which is composed of I6P8 peptide as a targeting moiety to interleukin-6 receptors (IL-6Rs), oxidized mesoporous carbon nanospheres (OMCN) as a near infrared (NIR)-triggered drug carrier and doxorubicin (DOX) as a chemotherapeutic drug and fluorescent agent. The synthesized multifunctional nanoplatform displayed high storage capacity for drugs and excellent photothermal properties. Besides, DOX was rapidly released from OMCNPID at the condition of low pH and NIR laser irradiation due to the dissociation of DOX from graphitic cores of OMCN. In vitro experimental results verified that OMCNPID could be markedly taken up by SKOV-3 monolayer cells and tumor spheroids, and revealed a remarkable synergistic chemo-photothermal effect against ovarian cancer. All the results demonstrated that OMCNPID is a pH/NIR dual-stimulus responsive nanoplatform and can achieve efficient chemo-thermo combined therapy. 相似文献
63.
Emmanuel de Billy Marsha Pellegrino Domenico Orlando Giulia Pericoli Roberta Ferretti Pietro Businaro Maria Antonietta Ajmone-Cat Sabrina Rossi Lucia Lisa Petrilli Nicola Maestro Francesca Diomedi-Camassei Marco Pezzullo Cristiano De Stefanis Paola Bencivenga Alessia Palma Rossella Rota Francesca Del Bufalo Luca Massimi Gerrit Weber Chris Jones Andrea Carai Simona Caruso Biagio De Angelis Ignazio Caruana Concetta Quintarelli Angela Mastronuzzi Franco Locatelli Maria Vinci 《Neuro-oncology》2022,24(7):1150
BackgroundDiffuse midline gliomas (DMG) H3K27M-mutant, including diffuse intrinsic pontine glioma (DIPG), are pediatric brain tumors associated with grim prognosis. Although GD2-CAR T-cells demonstrated significant anti-tumor activity against DMG H3K27M-mutant in vivo, a multimodal approach may be needed to more effectively treat patients. We investigated GD2 expression in DMG/DIPG and other pediatric high-grade gliomas (pHGG) and sought to identify chemical compounds that would enhance GD2-CAR T-cell anti-tumor efficacy.MethodsImmunohistochemistry in tumor tissue samples and immunofluorescence in primary patient-derived cell lines were performed to study GD2 expression. We developed a high-throughput cell-based assay to screen 42 kinase inhibitors in combination with GD2-CAR T-cells. Cell viability, western blots, flow-cytometry, real time PCR experiments, DIPG 3D culture models, and orthotopic xenograft model were applied to investigate the effect of selected compounds on DIPG cell death and CAR T-cell function.ResultsGD2 was heterogeneously, but widely, expressed in the tissue tested, while its expression was homogeneous and restricted to DMG/DIPG H3K27M-mutant cell lines. We identified dual IGF1R/IR antagonists, BMS-754807 and linsitinib, able to inhibit tumor cell viability at concentrations that do not affect CAR T-cells. Linsitinib, but not BMS-754807, decreases activation/exhaustion of GD2-CAR T-cells and increases their central memory profile. The enhanced anti-tumor activity of linsitinib/GD2-CAR T-cell combination was confirmed in DIPG models in vitro, ex vivo, and in vivo.ConclusionOur study supports the development of IGF1R/IR inhibitors to be used in combination with GD2-CAR T-cells for treating patients affected by DMG/DIPG and, potentially, by pHGG. 相似文献
64.
目的:研究重组人生长激素(recombinant hunman growth hormone,rhGH)对裸鼠肝癌移植瘤生长和转移能力的影响及相关信号转导通路的变化。方法:通过RNA干扰技术抑制MHCC-97H肝癌细胞中胰岛素样生长因子-1受体(insulin-like growth factor-1 receptor,IGF-1R)的表达。建立裸鼠皮下和原位肝癌移植模型;研究IGF-1R基因沉默前后,rhGH对裸鼠肝癌移植瘤成瘤、生长和转移的影响,并用Western印迹法检测PI-3K信号转导通路中,信号分子AKT的蛋白表达和磷酸化水平。结果:注射rhGH可使荷瘤裸鼠体重明显增加,肝癌原位移植瘤体积显著增大(P0.05)。IGF-1R基因沉默后,裸鼠皮下移植瘤的成瘤率、原位肝癌接种模型中的肝癌移植瘤体积均显著减小(P0.05)。对PI-3K信号通路的研究显示,rhGH能显著促进MHCC-97H肝癌细胞信号分子AKT磷酸化,IGF-1R沉默后AKT磷酸化水平明显降低(P<0.05)。结论:rhGH在体内具有显著促进荷瘤裸鼠体重增加及移植瘤生长的作用;但并不促进肝癌的转移。IGF-1R基因沉默后,rhGH对裸鼠移植瘤的成瘤和促生长作用明显减弱。而PI-3K信号通路在rhGH促肝癌生长中发挥重要的介导作用。 相似文献
65.
区域性淋巴结清扫对病人预后是否受益,切除远站的淋巴结是否会增加术后的并发症,一直受到人们质疑.胰腺癌周围神经丛浸润十分常见,胰内神经丛浸润可蔓延至胰外神经丛,是导致切缘阳性的重要因素,因而整块切除腹膜后组织包括部分神经丛应作为胰头癌手术的一个基本组成部分.全胰腺系膜切除(total mesopancreas excision,TMpE)理念的提出,要求包括神经、毛细血管及淋巴结在内的所有软组织的廓清,在不增加手术并发症和死亡的基础上,可提高RO切除率,有助于改善病人预后. 相似文献
66.
67.
68.
Objective Parent questionnaires of child motor and language skills are useful in many contexts. This study validates one such measure, the Preschool Child Development Inventory (PCDI), a mother‐answered standardized measure of motor (fine and gross) and language (expression and comprehension) skills of 3–6‐year‐old children. Methods Eighty‐one mothers answered the inventory and their children were concurrently tested on six verbal subtests of WPPSI‐RIS. Results The six language and motor subtests of the PCDI revealed the predicted convergent and divergent correlations with the verbal subtests of the WPPSI‐RIS. As predicted, the motor subtests diverged and the language subtests converged with the expected WPPSI‐RIS subtests. Principal components analysis of all the measures (the PCDI and the WPPSI‐RIS subtests) revealed two components, verbal and motor in content. Conclusions The findings support the validity of a mother‐answered inventory to assess language and motor development. It is pointed out that such inventories are a viable brief and cost effective alternative to individual testing, both to supplement such measures in clinical practice and as main information in research, for example on determinants of development. Some suggestions are made for future research and applications. 相似文献
69.
《Scandinavian journal of occupational therapy》2013,20(4):377-384
AbstractLife balance seems subjective, health related, and multidimensional. However, the concept is complex. Exploring what people themselves consider more or less important for their life balance and whether this differs between people would develop new knowledge. Q methodology was chosen for the present study, in which 32 working men and women without recent long-term sick leave participated. They sorted 42 statements regarding life balance according to their importance for each participant's life balance. The analysis resulted in four different viewpoints concerning life balance. All four viewpoints considered good relationships with those closest to them, as well as knowing that these people were doing well, as important. Each viewpoint also showed a unique orientation towards what was considered important for life balance: occupational balance (viewpoint 1), self-actualization (viewpoint 2), self-awareness (viewpoint 3), and reciprocal relationships (viewpoint 4). The results. showed support for life balance as being a subjective, multidimensional, and health-related phenomenon. The results demonstrated the importance of relationships for life balance and heterogeneity in what people considered important for their own life balance. 相似文献
70.
《Hospital practice (1995)》2013,41(4):55-65
Two distinct receptor mechanisms have been identified in relationship to the kidney's release of renin and the subsequent pressor effects of the renin-angiotensin system. One is intravascular, the other tubular. Recent studies have delineated the relative roles and signals perceived by each and have contributed to knowledge of feedback mechanisms as well as of the precise effects of pharmacologic interventions. 相似文献