全文获取类型
收费全文 | 8687篇 |
免费 | 593篇 |
国内免费 | 23篇 |
专业分类
耳鼻咽喉 | 42篇 |
儿科学 | 252篇 |
妇产科学 | 248篇 |
基础医学 | 1317篇 |
口腔科学 | 181篇 |
临床医学 | 1015篇 |
内科学 | 1660篇 |
皮肤病学 | 240篇 |
神经病学 | 1156篇 |
特种医学 | 217篇 |
外科学 | 698篇 |
综合类 | 67篇 |
一般理论 | 9篇 |
预防医学 | 793篇 |
眼科学 | 300篇 |
药学 | 530篇 |
中国医学 | 20篇 |
肿瘤学 | 558篇 |
出版年
2023年 | 78篇 |
2022年 | 118篇 |
2021年 | 205篇 |
2020年 | 185篇 |
2019年 | 215篇 |
2018年 | 271篇 |
2017年 | 212篇 |
2016年 | 222篇 |
2015年 | 270篇 |
2014年 | 300篇 |
2013年 | 456篇 |
2012年 | 733篇 |
2011年 | 717篇 |
2010年 | 374篇 |
2009年 | 339篇 |
2008年 | 641篇 |
2007年 | 590篇 |
2006年 | 548篇 |
2005年 | 518篇 |
2004年 | 480篇 |
2003年 | 446篇 |
2002年 | 434篇 |
2001年 | 63篇 |
2000年 | 38篇 |
1999年 | 60篇 |
1998年 | 83篇 |
1997年 | 72篇 |
1996年 | 66篇 |
1995年 | 45篇 |
1994年 | 50篇 |
1993年 | 41篇 |
1992年 | 28篇 |
1991年 | 22篇 |
1990年 | 17篇 |
1989年 | 15篇 |
1988年 | 15篇 |
1987年 | 19篇 |
1986年 | 19篇 |
1985年 | 17篇 |
1984年 | 21篇 |
1983年 | 16篇 |
1982年 | 23篇 |
1980年 | 16篇 |
1978年 | 22篇 |
1977年 | 14篇 |
1976年 | 12篇 |
1975年 | 12篇 |
1971年 | 12篇 |
1970年 | 10篇 |
1968年 | 10篇 |
排序方式: 共有9303条查询结果,搜索用时 0 毫秒
151.
Ian J Majewski Lorenza Mittempergher Nadia M Davidson Astrid Bosma Stefan M Willems Hugo M Horlings Iris de Rink Liliana Greger Gerrit KJ Hooijer Dennis Peters Petra M Nederlof Ingrid Hofland Jeroen de Jong Jelle Wesseling Roelof JC Kluin Wim Brugman Ron Kerkhoven Frank Nieboer Paul Roepman Annegien Broeks Thomas R Muley Jacek Jassem Jacek Niklinski Nico van Zandwijk Alvis Brazma Alicia Oshlack Michel van den Heuvel René Bernards 《The Journal of pathology》2013,230(3):270-276
152.
Juan David Farfán-Albarracín Cristina Lorena Ramírez-Sierra Oscar Mauricio Espitia Segura Sofy Helena Pérez Hugo Andrés Téllez Prada María Camila Rueda Rodríguez Ingrid Lemus Espitia Ana Maritza Bedoya 《Brain & development》2021,43(1):63-68
IntroductionThe ratio of cerebrospinal fluid (CSF) glucose and blood glucose is of major relevance, conducting to the diagnosis of hypoglycorrhachia, which is a sign of neuroinfection, as well as a number of neurological diseases of genetic or neoplastic etiology. Glucose in capillary sample (glucometry) is a low cost, readily available technique, as compared to venous glucose. This study aims to compare glucometry to venous glucose in the diagnosis of hypoglycorrhachia in pediatric population.MethodsProspective cross-sectional study based on data obtained from lumbar punctures in the period from February 2017 to January 2019 in a specialized pediatric institution in Colombia.Results97 patients were analyzed, aged 1 month to 17 years old, mean 7.67 years, 52 (53.61%) were female. 26 (26.8%) were diagnosed with hypoglycorrhachia. Pearson correlation coefficient for absolute venous and capillary glucose was 0.54, and 0.55 for the ratios of CSF glucose/venous glucose and CSF glucose/glucometry, which support a linear correlation between the variables in both, absolute values and ratios. Intraclass correlation coefficient was calculated for both, the venous glucose and glucometry ratios, which was 0.52, revealing a moderate agreement among the tests. Sensitivity and specificity of CSF glucose/glucometry, as compared to gold standard are 73.1% and 60.6% respectively; whereas predictive positive value (PPV) and negative predictive value (NPV), were 40.4% and 86.0%.ConclusionGlucometry cannot replace the glucose in venous sample in the diagnosis of hypoglycorrhachia in children. 相似文献
153.
154.
155.
Tomas Fagerberg Erik Sderman J Petter Gustavsson Ingrid Agartz Erik G Jnsson 《Psychiatry investigation》2021,18(5):373
ObjectiveTo investigate associations between Swedish universities Scales of Personality (SSP) and scales of the following personality instruments: Structured Clinical Interview for DSM-III-R axis II screening questionnaire (SCID-II screen), revised NEO personality inventory (NEO-PI-R), revised Chapman scales (Chapman) and the psychotic traits questionnaire (STQ). MethodsHealthy individuals (n=406) completed self-report personality questionnaires including SSP and at least one more personality inventory. Correlations were calculated between the 13 different SSP subscales as well as SSP’s three factors and factors and scales/subscales in SCID-II screen, NEO-PI-R, Chapman and STQ. The main factors of the various instruments were factor analysed. ICC were calculated. ResultsSSP Neuroticism factor correlated with SCID-II cluster C (r=0.71), NEO Neuroticism (r=0.80) and Chapman Social anhedonia (r=0.62). SSP Extraversion factor correlated with NEO Extraversion (r=0.63) and SSP Aggressiveness factor with NEO Agreeableness (r=-0.62). Strong correlations between SSP factors and scales and scales of the other instruments were sparse, although weaker correlations were common. ConclusionSSP is a useful investigation tool when measuring personality traits related to temperament-like features. SSP partly correlates well to especially three of the NEO-PI-R factors. The different personality inventories are not completely comparable to each other. Instead, they measure personality aspects in partly different ways. 相似文献
156.
Heiko Wendorff Jaroslav Pelisek Alexander Zimmermann Karin Mayer Heide Seidel Gregor Weirich Ingrid Hausser Corinna Siegel Alma Zernecke Hans-Henning Eckstein 《Cardiovascular pathology》2013,22(6):488-492
Ehlers–Danlos syndrome (EDS) leads to abnormalities in the synthesis of collagen and complications involving arterial vessels. We describe here a mutation in the intron 14 of the COL3A1 gene leading to EDS Type IV (EDS IV) associated with venous manifestations only. The patient, an 18-year-old male, suffered from truncal varicosity of the long saphenous vein on both sides. Conventional stripping surgery of the left saphenous vein revealed an extremely vulnerable ectatic superficial femoral vein. An inserted vein graft occluded, and venous thrombectomy was unsuccessful. A conservative anticoagulant and compression therapy finally succeeded. This is the first report describing EDS IV due to a mutation in intron 14 of the COL3A1 gene leading to venous manifestations without affecting arterial vessels at clinical presentation. Our findings imply that molecular genetic analysis should be considered in patients with unusual clinical presentation and that conservative therapy should be applied until a suspected clinical diagnosis has been secured. 相似文献
157.
Aletta M. E. Millen Gavin R. Norton Ingrid Avidon Angela J. Woodiwiss 《European journal of applied physiology》2013,113(7):1793-1803
To determine whether exercise training-induced decreases in blood pressure (BP) can be explained by decreases in aortic systolic pressure augmentation in overweight or obese individuals. Thirty-five sedentary or recreationally active men and women (30–57 years) who were either overweight (40 %) or obese (60 %) completed 6 weeks of exercise training (≥3 days/week; stationary bike and/or treadmill) either preceded (n = 19) or followed (n = 16) by a 6-week control period of no exercise. Aortic augmentation pressure (AP), aortic and peripheral augmentation indices (AIx), and central aortic BP (SphygmoCor) were determined before and after exercise training and a control period. Peak oxygen consumption increased (p = 0.0001) from 27.0 ± 5.1 to 28.8 ± 5.8 mL/(kg min) after 6 weeks of exercise. Exercise training decreased brachial systolic (SBP) and diastolic BP from 142 ± 8/94 ± 8 to 134 ± 11/86 ± 11 mmHg (p < 0.005/p < 0.005); whereas no changes were observed after the control period (141 ± 11/91 ± 9 mmHg, p = 0.81/p = 0.34). Neither AP (baseline: 9.2 ± 4.2 mmHg; after 6 weeks training: 8.7 ± 6.1 mmHg), aortic AIx (baseline: 24.6 ± 11.0 %; after 6 weeks training: 22.7 ± 11.1 %), nor peripheral AIx (baseline: 81.4 ± 16.7 mmHg; after 6 weeks training: 76.4 ± 16.5 mmHg) were modified by exercise training. Although aortic SBP decreased after exercise (132 ± 8 to 124 ± 12 mmHg, p < 0.002), these changes were accounted for by decreases in mean arterial pressure. In overweight or obese individuals, although short-term aerobic exercise training, which improved cardiorespiratory fitness, may produce marked decreases in aortic and brachial BP; these effects are not attributed to alterations in aortic systolic pressure augmentation. 相似文献
158.
159.
160.