全文获取类型
收费全文 | 644篇 |
免费 | 61篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 5篇 |
儿科学 | 40篇 |
妇产科学 | 28篇 |
基础医学 | 91篇 |
口腔科学 | 14篇 |
临床医学 | 54篇 |
内科学 | 176篇 |
皮肤病学 | 3篇 |
神经病学 | 65篇 |
特种医学 | 5篇 |
外科学 | 43篇 |
预防医学 | 36篇 |
眼科学 | 69篇 |
药学 | 43篇 |
肿瘤学 | 36篇 |
出版年
2024年 | 2篇 |
2023年 | 5篇 |
2022年 | 10篇 |
2021年 | 9篇 |
2020年 | 12篇 |
2019年 | 19篇 |
2018年 | 21篇 |
2017年 | 29篇 |
2016年 | 22篇 |
2015年 | 19篇 |
2014年 | 32篇 |
2013年 | 38篇 |
2012年 | 64篇 |
2011年 | 38篇 |
2010年 | 32篇 |
2009年 | 24篇 |
2008年 | 53篇 |
2007年 | 56篇 |
2006年 | 33篇 |
2005年 | 35篇 |
2004年 | 37篇 |
2003年 | 36篇 |
2002年 | 24篇 |
2001年 | 7篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 8篇 |
1997年 | 6篇 |
1996年 | 3篇 |
1995年 | 5篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1992年 | 3篇 |
1991年 | 2篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 2篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1978年 | 2篇 |
1977年 | 3篇 |
1973年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有708条查询结果,搜索用时 37 毫秒
611.
612.
Abramowitz EG Barak Y Ben-Avi I Knobler HY 《The International journal of clinical and experimental hypnosis》2008,56(3):270-280
This study evaluated the benefits of add-on hypnotherapy in patients with chronic PTSD. Thirty-two PTSD patients treated by SSRI antidepressants and supportive psychotherapy were randomized to 2 groups: 15 patients in the first group received Zolpidem 10 mg nightly for 14 nights, and 17 patients in the hypnotherapy group were treated by symptom-oriented hypnotherapy, twice-a-week 1.5-hour sessions for 2 weeks. All patients completed the Stanford Hypnotic Susceptibility Scale, Form C, Beck Depression Inventory, Impact of Event Scale, and Visual Subjective Sleep Quality Questionnaire before and after treatment. There was a significant main effect of the hypnotherapy treatment with PTSD symptoms as measured by the Posttraumatic Disorder Scale. This effect was preserved at follow-up 1 month later. Additional benefits for the hypnotherapy group were decreases in intrusion and avoidance reactions and improvement in all sleep variables assessed. 相似文献
613.
Salomons TV Moayedi M Weissman-Fogel I Goldberg MB Freeman BV Tenenbaum HC Davis KD 《The European journal of neuroscience》2012,35(9):1481-1487
Learned helplessness is a maladaptive response to uncontrollable stress characterized by impaired motor escape responses, reduced motivation and learning deficits. There are important individual differences in the likelihood of becoming helpless following exposure to uncontrollable stress but little is known about the neural mechanisms underlying these individual differences. Here we used structural MRI to measure gray and white matter in individuals with chronic pain, a population at high risk for helplessness due to prolonged exposure to a poorly controlled stressor (pain). Given that self-reported helplessness is predictive of treatment outcomes in chronic pain, understanding such differences might provide valuable clinical insight. We found that the magnitude of self-reported helplessness correlated with cortical thickness in the supplementary motor area (SMA) and midcingulate cortex, regions implicated in cognitive aspects of motor behavior. We then examined the white matter connectivity of these regions and found that fractional anisotropy of connected white matter tracts along the corticospinal tract was associated with helplessness and mediated the relationship between SMA cortical thickness and helplessness. These data provide novel evidence that links individual differences in the motor output pathway with perceived helplessness over a chronic and poorly controlled stressor. 相似文献
614.
615.
Cleper R Ben Shalom E Landau D Weissman I Krause I Konen O Rahamimov R Mor E Bar-Nathan N Frishberg Y Davidovits M 《Pediatric transplantation》2012,16(6):619-626
Cleper R, Ben Shalom E, Landau D, Weissman I, Krause I, Konen O, Rahamimov R, Mor E, Bar‐Nathan N, Frishberg Y, Davidovits M. Post‐transplantation lymphoproliferative disorder in pediatric kidney‐transplant recipients – A national study. Abstract: PTLD is the most common malignancy in pediatric kidney‐transplant recipients. We examined the prevalence, clinical features, and outcome of PTLD in Israel. Twelve (4.4%) of 272 pediatric (<19 yr) kidney‐transplant recipients retrieved from a search of the NIKTR for 1991–2008 had acquired PTLD at a median of 3.2 yr post‐transplantation. PTLD‐affected patients were younger at transplantation (4.2 vs. 12.5 yr, p = 0.02), had a higher rate of OKT3 therapy for acute rejection (25% vs. 4%, p = 0.015), and 5/12 were EBV‐seropositive at transplantation. Graft dysfunction was the presenting sign in six (50%). PTLD was predominantly abdominal (83%) and B‐cell type (67%); T‐cell PTLD occurred exclusively in EBV‐seropositive patients. Treatment consisted of immunosuppression cessation (6/12, 50%), antiviral agents (7/12, 58%), anti‐CD20 monoclonal antibodies (4/12, 33%), and chemotherapy (6/12, 50%). Survival was 100% in the EBV‐naïve patients and 40% in the EBV‐seropositive patients. Graft loss occurred in three of eight survivors (37.5%). PTLD‐associated mortality risk was older age: 11.2 vs. 3.4 yr, longer dialysis: 15 vs. 6.5 months, T‐cell type disease (75%), later PTLD onset: 6.35 vs. 1.9 yr post‐transplantation and era of transplantation (43% mortality before vs. 20% after 2001). Pretransplantation EBV‐seronegative status might confer a survival benefit with early detected PTLD. EBV‐seropositive patients are at risk for aggressive late‐onset lethal PTLD. 相似文献
616.
Leibovitch L Kuint J Rosenfeld E Schushan-Eisen I Weissmann-Brenner A Maayan-Metzger A 《Acta paediatrica (Oslo, Norway : 1992)》2012,101(7):727-730
Aim: To evaluate rates of early short‐term neonatal complications among term singleton newborn infants with oligohydramnios. Methods: Retrospective data were collected on 456 term infants with prenatal diagnosis of oligohydramnios and on matched controls, including information on maternal condition and on infant perinatal complications. Results: Infants in the study group were born with lower birthweight and were SGA compared with those in the control group. Rates of renal malformations were significantly higher in the study group compared with the controls (15–3.3% and 3–0.7%, respectively; p = 0.007). Among the severe oligohydramnios subgroup (Amniotic Fluid Index <2), renal anomalies were even more prevalent compared to other infants with oligohydramnios and to the controls (6–9.8%, 9–2.3% and 3–0.7%, respectively; p < 0.001). The incidence of skeletal deformities (developmental dislocation of hip and torticollis) was higher among the study group. Conclusion: Term infants with oligohydramnios that was detected near birth are associated with a greater prevalence of renal malformations (mostly mild hydronephrosis) as well as congenital torticollis and developmental dislocated hips compared with controls. Postnatal renal evaluation should be considered in infants with severe oligohydramnios. 相似文献
617.
BACKGROUND/AIMS: Intravenous cyclosporine has been used in the treatment of active inflammatory bowel disease. However, there are serious concerns regarding its toxicity. Cyclosporine's exact place in the treatment of Crohn's disease is yet to be defined. The aims of this study are to assess the safety and efficacy of intravenous cyclosporine in treatment of patients with inflammatory bowel disease. METHODOLOGY: We reviewed the hospital files of all patients who received intravenous cyclosporine in Rambam Medical Center during the period of December 2000 to November 2003. The patients' charts, focusing on clinical outcomes and toxicity were recorded and analyzed. RESULTS: Twenty patients, 10 males, seven with Crohn's disease and 13 ulcerative colitis. Seven patients underwent surgery within one year after cyclosporine therapy. Clinical response was achieved in 77.8% of Crohn's patients' treatment courses and 85.7% of ulcerative colitis patients' treatment courses. Clinical response included significant reduction in bowel movements, amount of blood and improvement in consistency of stool. No major or life-threatening adverse effects of cyclosporine were observed. CONCLUSIONS: Cyclosporine as given was as effective and safe for Crohn's disease patients as for ulcerative colitis patients. 相似文献
618.
619.
Sharabi Y Oron-Herman M Kamari Y Avni I Peleg E Shabtay Z Grossman E Shamiss A 《American journal of hypertension》2007,20(2):206-210
BACKGROUND: The health hazard of the metabolic syndrome (MS) is increasing, yet there is no effective pharmacologic treatment to this entity as a whole. Recently, hypoadiponectinemia was found to play an important role in the development of MS. We studied the effect of the PPAR-gamma agonist rosiglitazone on adiponectin and the metabolic profile in the fructose-induced hypertensive, hyperinsulinemic, hypertriglyceridemic rat model. METHODS: Thirty male Sprague-Dawley rats were divided into three groups. Ten were fed standard rat chow for 5 weeks, 10, a fructose-enriched diet for 5 weeks, and 10, a fructose-enriched diet for 5 weeks, with rosiglitazone 10 mg/kg/d added during the last 2 weeks. Blood pressure (BP), oral glucose tolerance test (OGTT), plasma insulin, triglycerides, and adiponectin were recorded, as well as mRNA levels of the adiponectin gene in visceral adipose tissue. RESULTS: Fructose-fed rats developed MS as manifested by the increase in systolic BP (from 139 +/- 3 to 158 +/- 4 mm Hg, P < .05), insulin (from 26 +/- 1.6 to 40 +/- 2.5 muU/mL, P < .05), triglycerides (from 91 +/- 9 to 304 +/- 24 mg/dL, P < .05), and impaired OGTT (area under the curve from 13,894 +/- 246 to 17,725 +/- 700 mg/dL/min). Treatment with rosiglitazone reversed these effects and reduced BP to 133 +/- 7 mm Hg, insulin levels to 30 +/- 2.8 muU/mL, triglycerides to 116 +/- 9 mg/dL, and the OGTT to 15,415 +/- 372 mg/dL/min (P < .05 for all variables). In addition, rosiglitazone increased plasma levels of adiponectin fourfold from 4.3 +/- 0.1 to 18.4 +/- 0.6 mug/mL (P < .05). This increase was coupled with 3.8-fold increase in adiponectin mRNA in visceral adipose tissue. CONCLUSIONS: This study shows for the first time that in an animal model of MS, the insulin sensitizer, rosiglitazone, improves the metabolic profile and increases plasma levels of adiponectin and its gene expression. It is possible therefore that rosiglitazone exerts its beneficial effects by increasing the levels of adiponectin. 相似文献
620.
Wood CL Byers JE Cottingham KL Altman I Donahue MJ Blakeslee AM 《Proceedings of the National Academy of Sciences of the United States of America》2007,104(22):9335-9339
Parasites often play an important role in modifying the physiology and behavior of their hosts and may, consequently, mediate the influence hosts have on other components of an ecological community. Along the northern Atlantic coast of North America, the dominant herbivorous snail Littorina littorea structures rocky intertidal communities through strong grazing pressure and is frequently parasitized by the digenean trematode Cryptocotyle lingua. We hypothesized that the effects of parasitism on host physiology would induce behavioral changes in L. littorea, which in turn would modulate L. littorea's influence on intertidal community composition. Specifically, we hypothesized that C. lingua infection would alter the grazing rate of L. littorea and, consequently, macroalgal communities would develop differently in the presence of infected versus uninfected snails. Our results show that uninfected snails consumed 40% more ephemeral macroalgal biomass than infected snails in the laboratory, probably because the digestive system of infected snails is compromised by C. lingua infection. In the field, this weaker grazing by infected snails resulted in significantly greater expansion of ephemeral macroalgal cover relative to grazing by uninfected snails. By decreasing the per-capita grazing rate of the dominant herbivore, C. lingua indirectly affects the composition of the macroalgal community and may in turn affect other species that depend on macroalgae for resources or habitat structure. In light of the abundance of parasites across systems, we suggest that, through trait-mediated indirect effects, parasites may be a common determinant of structure in ecological communities. 相似文献