全文获取类型
收费全文 | 473篇 |
免费 | 34篇 |
专业分类
儿科学 | 28篇 |
妇产科学 | 6篇 |
基础医学 | 49篇 |
口腔科学 | 14篇 |
临床医学 | 66篇 |
内科学 | 94篇 |
皮肤病学 | 14篇 |
神经病学 | 10篇 |
特种医学 | 141篇 |
外科学 | 14篇 |
综合类 | 13篇 |
预防医学 | 18篇 |
眼科学 | 1篇 |
药学 | 18篇 |
肿瘤学 | 21篇 |
出版年
2022年 | 5篇 |
2021年 | 8篇 |
2019年 | 4篇 |
2018年 | 10篇 |
2017年 | 3篇 |
2016年 | 6篇 |
2015年 | 13篇 |
2014年 | 8篇 |
2013年 | 27篇 |
2012年 | 4篇 |
2011年 | 5篇 |
2010年 | 23篇 |
2009年 | 26篇 |
2008年 | 3篇 |
2007年 | 5篇 |
2006年 | 6篇 |
2005年 | 4篇 |
2004年 | 6篇 |
2003年 | 3篇 |
2002年 | 2篇 |
2001年 | 5篇 |
2000年 | 3篇 |
1999年 | 7篇 |
1998年 | 29篇 |
1997年 | 29篇 |
1996年 | 32篇 |
1995年 | 24篇 |
1994年 | 25篇 |
1993年 | 22篇 |
1992年 | 3篇 |
1991年 | 6篇 |
1990年 | 4篇 |
1989年 | 16篇 |
1988年 | 12篇 |
1987年 | 12篇 |
1986年 | 10篇 |
1985年 | 9篇 |
1984年 | 8篇 |
1983年 | 7篇 |
1982年 | 8篇 |
1981年 | 9篇 |
1980年 | 3篇 |
1979年 | 5篇 |
1978年 | 7篇 |
1977年 | 13篇 |
1976年 | 12篇 |
1975年 | 10篇 |
1974年 | 1篇 |
1972年 | 1篇 |
1968年 | 2篇 |
排序方式: 共有507条查询结果,搜索用时 15 毫秒
501.
502.
BW Brewer NS Diehl AE Cornelius MD Joshua JL Van Raalte 《Journal of Science and Medicine in Sport》2004,7(1):47-55
This study examined relations among body mass index (BMI), social physique anxiety (SPA) and protective self-presentational exercise behaviours in a sample of 86 female participants in aerobics classes at a university fitness centre. Participants completed a questionnaire assessing demographic and exercise-related information, the 9-item version of the Social Physique Anxiety Scale, and measures of two forms of protective self-presentational exercise behaviour (i.e., preferring to stand away from the aerobics instructor and wearing concealing exercise attire). Consistent with previous research, SPA was positively associated with both preferred exercise studio floor position (r = .31, p < .05) and clothing concealingness (r = .25, p < .05). SPA did not mediate the relations between BMI and either of the two protective self-presentational behaviours. BMI was a better predictor of clothing concealingness than SPA, but the opposite was found for exercise studio floor position preferences (r = .31 with SPA versus r = .15 with BMI). The findings provide an enhanced understanding of factors associated with self-presentation in exercise. 相似文献
503.
AE Ani B Diarra UR Dahle C Lekuk F Yetunde AM Somboro Tounkara Anatole J Idoko 《亚太热带病杂志(英文版)》2011,1(4):259-262
ObjectiveTo identify Mycobacterium tuberculosis (M. tuberculosis) and other acid fast organisms isolated from sputum of HIV positive adult patients with pulmonary disease in Jos, Nigeria.MethodsAcid fast organisms isolated from 80 acid fast bacilli (AFB) positive sputa of HIV positive adult patients suspected for tuberculosis in Jos, Nigeria were identified for members of M. tuberculosis complex (M. tuberculosis, Mycobacterium bovis, Mycobacterium africanum, Mycobacterium canetti, Mycobacterium microti and Mycobacterium caprae) by use of spoligootyping, Multiplex Gen Probe, Hain genotype assay and gene sequencing for spoligotype negative isolates.ResultsSeven different spoligotypes of M. tuberculosis complex were identified from 70/80 (87.5%) total number of isolates. Mycobacterium kansasii (1), Mycobacterium dulvalii (1) Nocardia species (1) and Tsukamurella species (2) were detected from 5/10 spoligotype negative isolates.ConclusionsAlthough M. tuberculosis is the dominant AFB associated with chronic pulmonary disease in Jos, Nigeria, other clinically relevant mycobacteria were also observed in the study. This suggests that other AFB positive microorganisms associated with tuberculosis-like symptoms might be misdiagnosed and incorrectly treated as M. tuberculosis. It is therefore necessary for laboratories in tuberculosis high burden countries to step up diagnostic procedures beyond routine smear microscopy. 相似文献
504.
Oral Diseases (2010) 16 , 176–184 Objective: The aim of this cross‐sectional study was to evaluate the dental status of 101 Portuguese HIV+ subjects aged 22–71 years (mean = 39) and its association with clinical, socioeconomic, and behavioral variables. Materials and Methods: A calibrated dentist performed clinical examination and collected data on dental caries, periodontal status, dental plaque levels, prosthetic conditions, and need. The volunteers completed questionnaires on socioeconomic and behavioral variables as well as the Oral Health Impact Profile (OHIP‐14) questionnaire. Univariate and multiple logistic regression (MLR) analyses were performed. Results: The mean number of decayed, missing or filled teeth index (DMFT index) was 16.44, standard deviation (s.d.) = 8.42. MLR demonstrated that salaried employee and those with OHIP‐14 ≤4.22, or any/no dental plaque were less prone to have DMFT > median (=17). As regards prosthetic status, 28.8% of the examined individuals used dental prosthesis. MLR demonstrated that HIV+ with DMFT >17 or those who knew they were HIV‐positive for longer than 5 years were more prone to need dental prostheses. The mean OHIP‐14 index was 5.83 (s.d. = 7.79). Conclusions: The dental health status of HIV‐infected Portuguese patients was unsatisfactory and related to clinical, socioeconomic, and behavioral variables. 相似文献
505.
Nobbenhuis MA Bancroft E Moskovic E Lennard F Pharoah P Jacobs I Ward A Barton DP Ind TE Shepherd JH Bridges JE Gore M Haracopos C Shanley S Ardern-Jones A Thomas S Eeles R 《Hereditary cancer in clinical practice》2011,9(1):11-6
Background
We assessed ovarian cancer screening outcomes in women with a positive family history of ovarian cancer divided into a low-, moderate- or high-risk group for development of ovarian cancer.Methods
545 women with a positive family history of ovarian cancer referred to the Ovarian Screening Service at the Royal Marsden Hospital, London from January 2000- December 2008 were included. They were stratified into three risk-groups according to family history (high-, moderate- and low-risk) of developing ovarian cancer and offered annual serum CA 125 and transvaginal ultrasound screening. The high-risk group was offered genetic testing.Results
The median age at entry was 44 years. The number of women in the high, moderate and low-risk groups was 397, 112, and 36, respectively. During 2266 women years of follow-up two ovarian cancer cases were found: one advanced stage at her fourth annual screening, and one early stage at prophylactic bilateral salpingo-oophorectomy (BSO). Prophylactic BSO was performed in 138 women (25.3%). Forty-three women had an abnormal CA125, resulting in 59 repeat tests. The re-call rate in the high, moderate and low-risk group was 14%, 3% and 6%. Equivocal transvaginal ultrasound results required 108 recalls in 71 women. The re-call rate in the high, moderate, and low-risk group was 25%, 6% and 17%.Conclusion
No early stage ovarian cancer was picked up at annual screening and a significant number of re-calls for repeat screening tests was identified. 相似文献506.
W Cao HP Shah AV Glushakov AP Mecca P Shi C Sumners CN Seubert AE Martynyuk 《British journal of pharmacology》2009,158(8):2005-2013
Background and purpose:
Abnormal glutamatergic activity is implicated in neurologic and neuropsychiatric disorders. Selective glutamate receptor antagonists were highly effective in animal models of stroke and seizures but failed in further clinical development because of serious side effects, including an almost complete set of symptoms of schizophrenia. Therefore, the novel polyvalent glutamatergic agent 3,5-dibromo-L-phenylalanine (3,5-DBr-L-Phe) was studied in rat models of stroke, seizures and sensorimotor gating deficit.Experimental approach:
3,5-DBr-L-Phe was administered intraperitoneally as three boluses after intracerebral injection of endothelin-1 (ET-1) adjacent to the middle cerebral artery to cause brain injury (a model of stroke). 3,5-DBr-L-Phe was also given as a single bolus prior to pentylenetetrazole (PTZ) injection to induce seizures or prior to the administration of the N-methyl-D-aspartate (NMDA) receptor antagonist dizocilpine (MK-801) to cause disruption of prepulse inhibition (PPI) of startle (sensorimotor gating deficit).Key results:
Brain damage caused by ET-1 was reduced by 52%, which is comparable with the effects of MK-801 in this model as reported by others. 3,5-DBr-L-Phe significantly reduced seizures induced by PTZ without the significant effects on arterial blood pressure and heart rate normally caused by NMDA antagonists. 3,5-DBr-L-Phe prevented the disruption of PPI measured 3 days after the administration of ET-1. 3,5-DBr-L-Phe also eliminated sensorimotor gating deficit caused by MK-801.Conclusion and implications:
The pharmacological profile of 3,5-DBr-L-Phe might be beneficial not only for developing a therapy for the neurological and cognitive symptoms of stroke and seizures but also for some neuropsychiatric disorders. 相似文献507.
Georgios Ponirakis Tarik Elhadd Ebaa Al Ozairi Imad Brema Subitha Chinnaiyan Etab Taghadom Jumana Al Kandari Rehab Al Wotayan Abdulla Al Ozairi Naji Aljohani Wael AlMistehi Nora Al Qahtani Shawana Khan Zeinab Dabbous Mashhood A Siddique Ioannis N Petropoulos Adnan Khan Hamad Almuhannadi Khaled AE Ashawesh Khaled M Dukhan Ziyad R Mahfoud Mahmoud A Zirie Amin Jayyousi Rayaz A Malik 《Journal of diabetes investigation.》2022,13(9):1551
Aims/IntroductionThis study determined the prevalence and risk factors for diabetic peripheral neuropathy (DPN), painful DPN and diabetic foot ulceration (DFU) in patients with type 2 diabetes in secondary healthcare in Qatar, Kuwait and the Kingdom of Saudi Arabia.Materials and MethodsAdults aged 18–85 years with type 2 diabetes were randomly enrolled from secondary healthcare, and underwent clinical and metabolic assessment. DPN was evaluated using vibration perception threshold and neuropathic symptoms and painful Diabetic Peripheral Neuropathy was evaluated using the Douleur Neuropathique 4 questionnaire.ResultsA total of 3,021 individuals were recruited between June 2017 and May 2019. The prevalence of DPN was 33.3%, of whom 52.2% were at risk of DFU and 53.6% were undiagnosed. The prevalence of painful DPN was 43.3%, of whom 54.3% were undiagnosed. DFU was present in 2.9%. The adjusted odds ratios for DPN and painful DPN were higher with increasing diabetes duration, obesity, poor glycemic control and hyperlipidemia, and lower with greater physical activity. The adjusted odds ratio for DFU was higher with the presence of DPN, severe loss of vibration perception, hypertension and vitamin D deficiency.ConclusionsThis is the largest study to date from the Middle East showing a high prevalence of undiagnosed DPN, painful DPN and those at risk of DFU in patients with type 2 diabetes, and identifies their respective risk factors. 相似文献