全文获取类型
收费全文 | 523篇 |
免费 | 40篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 5篇 |
儿科学 | 21篇 |
妇产科学 | 27篇 |
基础医学 | 53篇 |
口腔科学 | 16篇 |
临床医学 | 51篇 |
内科学 | 160篇 |
皮肤病学 | 11篇 |
神经病学 | 24篇 |
特种医学 | 6篇 |
外科学 | 47篇 |
综合类 | 14篇 |
一般理论 | 2篇 |
预防医学 | 42篇 |
眼科学 | 10篇 |
药学 | 47篇 |
中国医学 | 6篇 |
肿瘤学 | 26篇 |
出版年
2024年 | 3篇 |
2023年 | 10篇 |
2022年 | 14篇 |
2021年 | 30篇 |
2020年 | 22篇 |
2019年 | 27篇 |
2018年 | 28篇 |
2017年 | 26篇 |
2016年 | 25篇 |
2015年 | 12篇 |
2014年 | 28篇 |
2013年 | 48篇 |
2012年 | 37篇 |
2011年 | 42篇 |
2010年 | 27篇 |
2009年 | 26篇 |
2008年 | 49篇 |
2007年 | 43篇 |
2006年 | 20篇 |
2005年 | 16篇 |
2004年 | 9篇 |
2003年 | 8篇 |
2002年 | 1篇 |
2001年 | 4篇 |
2000年 | 6篇 |
1999年 | 3篇 |
1997年 | 2篇 |
1986年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有568条查询结果,搜索用时 15 毫秒
1.
Elaheh Foroumandi Roghayeh Javan Leili Moayed Hossein Fahimi Fereshteh Kheirabadi Mahboubeh Neamatshahi Fazeleh Shogofteh Azam Zarghi 《Phytotherapy research : PTR》2023,37(1):285-294
The aim of the current randomized control trial (RCT) study was to investigate the effects of fenugreek seed extract on memory, depression, quality of life, blood pressure, and serum malondialdehyde (MDA) and total antioxidant capacity (TAC) levels in adult AD patients. This randomized clinical trial was conducted in geriatric homes in Iran. The study participants included 82 AD patients with mild-to-moderate memory deficit. Patients in the intervention group received 5 cc of fenugreek seed extract for 4 months and subjects in the control group received a placebo. Memory, depression, quality of life, and BP levels, as well as serum MDA and TAC, were assessed before and after the intervention. There was a significant increase in serum levels of TAC (p < 0.001) and a reduction in serum MDA status (p < 0.001) after 4 months of fenugreek seed extract supplementation. In addition, increasing levels of memory (p < 0.001) and quality of life (p < 0.001), as well as reduction of depression (p = 0.002), systolic BP (p < 0.001), and diastolic BP (p < 0.001) levels were detected in the intervention group compared with baseline. Fenugreek seed extract supplementation in AD patients shows promising positive effects on memory, quality of life, BP, and selective oxidative indices levels. 相似文献
2.
Kiani Zahra Simbar Masoumeh Nazarpour Soheila Rashidi Fakari Farzaneh 《Archives of sexual behavior》2022,51(7):3223-3224
Archives of Sexual Behavior - 相似文献
3.
4.
5.
6.
Babak Rezvanjoo Samira Rashidi Abolghasem Jouyban Seyed Hamed Shirazi Beheshtiha Morteza Samini 《Current therapeutic research》2010,71(5):322-330
Background: Superoxide dismutase (SOD) is one of the defense mechanisms against free radicals. Cysteamine is a cytotoxic agent, acting through generation of reactive oxygen species (ROS) such as hydrogen peroxide, hydroxyl radical, and superoxide, and may decrease defense activity of SOD against ROS and induce duodenal ulcer. Melatonin is a suicidal antioxidant that has a protective effect against ROS and cytoprotective effect through inhibition of the decrease in SOD activity.Objectives: The primary aim of this study was to assess the effects of pretreatment with vitamin C and melatonin on cysteamine-induced duodenal ulcer. Secondary aims were to compare the ulcerogenic effect of cysteamine and the antiulcer effects of vitamin C and melatonin.Methods: This study was performed in male Wistar rats (200-250 g) in 3 groups of equal size (n = 24): bile duct ligation-induced cholestasis (test), sham, and control groups. In the test and sham groups, laparotomy was performed under general anesthesia and the common bile duct was identified; in sham rats, the common bile duct was left in situ, but in test rats, the common bile duct was isolated and doubly ligated to induce cholestasis. Animals in each group were also divided into 4 equal subgroups (n = 6). These subgroups were treated with vitamin C plus cysteamine, melatonin plus cysteamine, cysteamine alone, and saline, respectively. All animals were euthanized via overdose of ether anesthesia 24 hours after the last injection of cysteamine or saline, and 0.5 mL of blood was collected from the heart ventricle. The duodenum was cut open, washed with saline, fixed, and prepared for calculation of ulcer index (Szabo method) and histopathologic assessment. SOD activity was measured using a branded enzyme kit.Results: In all 3 groups, animals treated with cysteamine had significantly increased mean (SE) ulcer index (test, 4.00 [0.10] vs 1.17 [0.30]; sham, 3.83 [0.16] vs 0.50 [0.22]; control, 3.67 [0.21] vs 0 [0]) and decreased SOD activity (test, 146.41 [2.16] vs 299.83 [1.94] U/mL; sham, 154.75 [2.02] vs 303.08 [0.35] U/mL; control, 157.08 [1.67] vs 314.50 [1.14] U/mL) compared with saline-treated rats (all, P < 0.001). In the test rats, ulcer index was significantly increased and SOD activity was significantly decreased compared with the sham and control groups (both, P < 0.001). Pretreatment with vitamin C and melatonin was associated with attenuation of ulcer index and increased SOD activity compared with rats treated with cysteamine alone (P < 0.001). There were no significant differences in ulcer index or SOD activity between groups administered vitamin C or melatonin.Conclusions: In this experimental study, pretreatment with melatonin or vitamin C in all rats produced significant attenuation of the ulcer index and enhanced SOD activity. Cysteamine-induced duodenal mucosal damage was greater in cholestatic rats compared with sham and control rats. 相似文献
7.
This investigation was conducted to evaluate the effect of deferasirox on selenium toxicity in male rat organs. After 50 days of selenium administration, all the rats showed toxicity symptoms. After poisoning, deferasirox was given orally to rats during 10 days. The results show that toxicity symptoms were unexpectedly increased. The new symptoms of toxicity after deferasirox administration were including loss of body hairs, yellowish discoloration of hair, weakness, brown spot on their skin, enlargement of the spleen and shrinking of sex organs. Selenium and iron concentrations were determined by GFAAS and FAAS, respectively. The results indicate the poisoned rats with selenium that received deferasirox as a drug, shown serious symptoms such as exacerbate toxicity, reduction in iron concentration, anemia and even death after a few days of deferasirox administration. 相似文献
8.
Effect of Iron Supplementation on Oxidative Stress and Intestinal Inflammation in Rats with Acute Colitis 总被引:4,自引:0,他引:4
Aghdassi E Carrier J Cullen J Tischler M Allard JP 《Digestive diseases and sciences》2001,46(5):1088-1094
In this study, we investigated the effect of intraperitoneal iron dextran (100mg/100 g body weight) on oxidative stress and intestinal inflammation in rats with acute colitis induced by 5% dextran sulfate sodium. In both colitis and healthy animals, disease activity index, crypt and inflammatory scores, colon length, plasma and colonic lipid peroxides, and plasma vitamins E, C, and retinol were assessed. The results showed that iron-supplemented groups had moderate iron deposition in the colonic submucosa and lamina propria. In the colitis group supplemented with iron, colon length was significantly shorter; disease activity index, crypt, and inflammatory scores and colonic lipid peroxides were significantly higher; and plasma -tocopherol was significantly lower compared to the colitis group without iron supplementation. There was no intestinal inflammation and no significant increase in colonic lipid peroxides in healthy rats supplemented with iron. In conclusion, iron injection resulted in an increased oxidative stress and intestinal inflammation in rats with colitis but not in healthy rats. 相似文献
9.
10.