全文获取类型
收费全文 | 831篇 |
免费 | 32篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 13篇 |
妇产科学 | 20篇 |
基础医学 | 108篇 |
口腔科学 | 11篇 |
临床医学 | 140篇 |
内科学 | 343篇 |
皮肤病学 | 11篇 |
神经病学 | 31篇 |
特种医学 | 11篇 |
外科学 | 38篇 |
综合类 | 5篇 |
预防医学 | 63篇 |
眼科学 | 5篇 |
药学 | 47篇 |
中国医学 | 4篇 |
肿瘤学 | 16篇 |
出版年
2023年 | 11篇 |
2022年 | 20篇 |
2021年 | 33篇 |
2020年 | 33篇 |
2019年 | 25篇 |
2018年 | 27篇 |
2017年 | 27篇 |
2016年 | 23篇 |
2015年 | 33篇 |
2014年 | 27篇 |
2013年 | 35篇 |
2012年 | 57篇 |
2011年 | 45篇 |
2010年 | 42篇 |
2009年 | 18篇 |
2008年 | 33篇 |
2007年 | 34篇 |
2006年 | 29篇 |
2005年 | 20篇 |
2004年 | 19篇 |
2003年 | 17篇 |
2002年 | 19篇 |
2001年 | 15篇 |
2000年 | 16篇 |
1999年 | 12篇 |
1998年 | 2篇 |
1996年 | 2篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 15篇 |
1991年 | 10篇 |
1990年 | 18篇 |
1989年 | 17篇 |
1988年 | 12篇 |
1987年 | 13篇 |
1986年 | 15篇 |
1985年 | 18篇 |
1984年 | 13篇 |
1983年 | 9篇 |
1982年 | 11篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1979年 | 5篇 |
1978年 | 5篇 |
1977年 | 4篇 |
1976年 | 9篇 |
1975年 | 1篇 |
1974年 | 5篇 |
1973年 | 4篇 |
1972年 | 4篇 |
排序方式: 共有868条查询结果,搜索用时 281 毫秒
101.
Mohammad DEHGHAN Negin AKBARI Nazila ALBORZI Somayeh SADANI Abas A. KESHTKAR 《The Journal of dermatology》2010,37(8):699-702
This study was designed to compare the therapeutic effects of topical clotrimazole and systemic fluconazole in pityriasis versicolor. A double‐blind randomized controlled trial was carried out in the dermatological clinic of Gorgan, northern Iran, between April 2006 and May 2007. All consecutive patients with pityriasis versicolor were included and randomly divided into two groups. In the first group (G1), patients underwent treatment with a single dose of fluconazole capsule (400 mg) and placebo cream. In the second group (G2), patients underwent treatment with clotrimazole cream (twice daily) and placebo capsule. The course of treatment was 2 weeks. All subjects were re‐evaluated 2, 4 and 12 weeks after the end of the therapeutic course. After 2 weeks, the rate of complete resolution of disease was significantly higher in G2 than G1 (49.1% vs 30%). After 4 weeks, 41 patients (81.2%) of G1 and 52 patients (94.9%) of G2 showed complete resolution. After 12 weeks, 46 patients (92%) in G1 and 45 patients (81.8%) in G2 showed complete resolution. Recurrence rate in G1 and G2 were 6% and 18.2%, respectively. No complications were seen in either group. In this study, clinical response at week 4 was greater in the clotrimazole group than the fluconazole group. Recurrence at week 12 after treatment was less with oral fluconazole than clotrimazole cream. So, for better evaluation, more studies need to be done. 相似文献
102.
Alzheimer's disease(AD) is associated with oxidative stress, and ultimately results in cognitive deficit. Despite existing literature on the pathophysiology of AD, there is currently no cure for AD. The present study investigated the effects of kaempferol(Kmp) isolated from the extract of Mespilus germanica L.(medlar) leaves on cognitive impairment, hippocampal antioxidants, apoptosis, lipid peroxidation and neuro-inflammation markers in ovariectomized(OVX) rat models of sporadic AD. Kaempferol, as the main flavonoid of medlar extract has been previously known for anti-oxidative, anti-inflammatory and anti-neurotoxic effects. Thirty-two female Wistar rats were ovariectomized, and randomly divided into four groups: sham, OVX + saline, OVX + streptozotocin(STZ) + saline, OVX + STZ + Kmp. Animals received intracerebroventricular injection of STZ(3 mg/kg, twice with one day interval) to establish models of sporadic AD. Intraperitoneal injection of Kmp(10 mg/kg) for 21 days was performed in the OVX + STZ + Kmp group. Spatial learning and memory of rats were evaluated using a Morris water maze. Finally, brain homogenates were used for biochemical analysis by enzyme-linked immunosorbent assay. The results showed a significant improvement in spatial learning and memory as evidenced by shortened escape latency and searching distance in Morris water maze in the OVX + STZ + Kmp group compared with the OVX + STZ group. Kmp also exhibited significant elevations in brain levels of antioxidant enzymes of superoxide dismutase and glutathione, while reduction in tumor necrosis factor-α and malondialdehyde. Our results demonstrate that Kmp is capable of alleviating STZ-induced memory impairment in OVX rats, probably by elevating endogenous hippocampal antioxidants of superoxide dismutase and glutathione, and reducing neuroinflammation. This study suggests that Kmp may be a potential neuroprotective agent against cognitive deficit in AD. 相似文献
103.
Fatemeh Effati-Daryani Mojgan Mirghafourvand Mohsen Taghizadeh Reza Bekhradi Somayeh Zarei 《Women & health》2013,53(10):1179-1191
Sleep disturbance and fatigue are frequent complaints during pregnancy and postpartum. We assessed the effectiveness of Lavender cream and footbath on sleep quality and fatigue in pregnancy and postpartum. In this trial, 141 women with sleep disturbance at 25–28 weeks gestation were recruited from public health centers in Tabriz, Iran, from May 2013 until January 2014 and randomized into one of three groups receiving: Lavender and footbath, Lavender alone, or placebo cream. Sleep quality was assessed using the Pittsburgh sleep quality index at the 4th and 8th weeks after intervention and the 6th week postpartum. Fatigue was assessed with the multidimensional assessment of fatigue scale at the 6th week after intervention and the 6th week postpartum. Repeated measures ANOVA and ANCOVA were used. Compared with the placebo group, the global sleep quality score post-intervention in pregnancy and the postpartum were significantly lower in the Lavender and footbath and the Lavender cream only groups. Fatigue in both intervention groups was significantly improved only at the 6th week postpartum. No statistically significant differences were observed between the two intervention groups. Lavender cream with or without footbath may improve sleep quality in pregnancy and postpartum. 相似文献
104.
105.
Rapid detection of intercellular adhesion molecule 1 (G241R and K469E) polymorphisms by a novel PCR-SSP assay 总被引:1,自引:0,他引:1
Intercellular adhesion molecule 1 (ICAM-1) is a cell surface glycoprotein member of the immunoglobulin superfamily and is actively involved in immune and inflammatory responses. We introduce a novel polymerase chain reaction-sequence-specific primers (PCR-SSP) method for rapid and simultaneous genotyping of ICAM-1 G241R and K469E polymorphisms. In a total of 184 DNA samples that have been previously analyzed for these polymorphisms using polymerase chain reaction-restriction fragment length polymorphism technique, re-genotyping of all samples with this new assay showed accurate and reproducible results. As PCR-SSP-based genotyping protocols are more convenient and cost-effective to do, it could therefore offer a valuable tool for assessment of ICAM-1 polymorphisms to which more confirmatory studies are needed. 相似文献
106.
Symptomatic pericardial effusion has been recognized as a diagnostic and therapeutic problem for many centuries. Although surgical incision and blind needle puncture of the pericardium for removal of the fluid have been available for somewhat more than 150 years, both procedures are associated with serious complications. Echocardiography provides a unique means of diagnosing and managing pericardial effusion. The two-dimensional echocardiographic beam demonstrates the presence of the pericardial effusion and locates an ideal entry point and track for the needle used in pericardiocentesis. At our institution, echocardiography-directed pericardiocentesis has been the procedure of choice for cardiac tamponade for the past 4 years, during which time 132 consecutive pericardial taps have been performed. Our experience has shown that this is a safe, effective technique that can be used by a physician who is familiar with two-dimensional echocardiography. We recommend its wide acceptance and use. 相似文献
107.
Sadeghi H Allard P Lachance R Aissaoui R Sadeghi S Perrault R Duhaime M 《American journal of physical medicine & rehabilitation / Association of Academic Physiatrists》2002,81(6):429-436
OBJECTIVE: This study was undertaken to demonstrate that the ankle frontal muscle power absorption and generation at push-off are related to the foot's initial position at heel-strike with respect to the body center of mass. DESIGN: Nineteen able-bodied male subjects participated in this study and were divided into two groups according to ankle frontal plane power generation or absorption at push-off. RESULTS: At heel-strike, the group that absorbed had a center of pressure that was located on average 25% more anteriorly and 36% more laterally to the body center of mass. Moreover, at push-off, the center of pressure was closer (26%) to the center of mass than in the generating group. The absorbing group compensated by increasing their sagittal plane hip energy by 30% to pull the lower limb forward and their knee power absorption by 47% to slow down the leg before the subsequent heel-strike. CONCLUSIONS: The foot's initial position at heel-strike explains in part the ankle frontal power generation or absorption at push-off. Increasing hip and knee sagittal joint powers and mechanical energies were the main contributors in compensating and providing a broader base of support and frontal plane ankle power absorption. 相似文献
108.
Niloufar Rasaei Atieh Mirzababaei Hana Arghavani Somayeh Tajik Seyed Ali Keshavarz Mir Saeed Yekaninejad Hossein Imani Khadijeh Mirzaei 《Diabetes & Metabolic Syndrome: Clinical Research & Reviews》2018,12(6):1147-1153
Aim
Metabolically Healthy Obese (MHO) is called to obese people that their insulin sensitivity, lipid profiles and inflammatory profiles are favorable, and there are no signs of hypertension and cardio-metabolic diseases. The metabolically unhealthy obese (MUHO) is the opposite. A Body Shape Index (ABSI) is a marker to identifying abdominal obesity that is derived from weight, height and waist circumference (WC). Several studies have reported ABSI is associated with diabetes, metabolic syndrome, hypertension and higher mortality rate.Materials and methods
A total of 305 overweight and obese women were included in the current comparative cross-sectional study. Body composition was measured using body composition analyzer. Blood samples were obtained. The usual food intake of evaluated through the use of a semi-quantitative food frequency questionnaire.Results
The results of this study revealed that there is a significant relationship between ABSI and MHO and MUHO (p?=?0.04) and area under the ROC curve was 0.60. Also there is a significant relationship between BMI, fat mass index (FMI), free fat mass index (FFMI), neck circumference (NC), WC, fat mass (FM) and metabolic healthy status (MHS). The largest area under the ROC curve belonged to NC, WC, FM and BMI (0.66).Conclusion
The findings of this study suggest that there is a significant relationship between ABSI, BMI, FMI, FFMI, NC, WC, FM and MHS. The largest area under the ROC curve was related to the NC, WC, FM and BMI not ABSI, that means NC, WC, FM and BMI have maximum sensitivity and specificity. 相似文献109.
110.