首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   430篇
  免费   29篇
  2024年   3篇
  2023年   11篇
  2022年   27篇
  2021年   41篇
  2020年   24篇
  2019年   33篇
  2018年   31篇
  2017年   21篇
  2016年   26篇
  2015年   35篇
  2014年   15篇
  2013年   28篇
  2012年   10篇
  2011年   17篇
  2010年   4篇
  2009年   10篇
  2008年   10篇
  2007年   10篇
  2006年   10篇
  2005年   9篇
  2004年   8篇
  2003年   7篇
  2002年   6篇
  2001年   3篇
  2000年   3篇
  1999年   6篇
  1998年   2篇
  1997年   1篇
  1993年   1篇
  1992年   2篇
  1991年   3篇
  1990年   1篇
  1989年   2篇
  1988年   5篇
  1987年   1篇
  1986年   4篇
  1985年   2篇
  1984年   3篇
  1983年   3篇
  1982年   3篇
  1981年   4篇
  1980年   3篇
  1979年   3篇
  1978年   3篇
  1977年   1篇
  1973年   1篇
  1972年   1篇
  1969年   2篇
排序方式: 共有459条查询结果,搜索用时 15 毫秒
411.
412.
413.
Abstract

Introduction: Stomach ulcer is one of the most prevalent disorders worldwide. The study was aimed to isolate and characterize the major polymethoxylated flavonoids in Citrus sinensis peels petroleum ether extract and investigate its protective and curative effect on gastric ulcer.

Material and methods: Some spectral analyses were used for identification of the isolated compounds from the petroleum ether extract of Citrus sinensis peels. One oral dose (0.5?ml/100?g b.wt.) of absolute ethanol was orally given to rats after starvation for 24?h to induce gastric ulcer. To explore the protective and curative role of the plant extract, it was orally (250?mg/kg b.wt.) given for 1 week either before or post-ulcer induction. A reference drug, ranitidine (100?mg/kg b.wt.), was also evaluated. Stomach acidity, gastric volume, lesion counts, glutathione (GSH), superoxide dismutase (SOD), malondialdehyde (MDA), succinate dehydrogenase (SDH), lactate dehydrogenase (LDH), acid phosphatase (AP), interlukin-10 (IL-10) and prostaglandin E2 (PGE2) were estimated. Stomach histopathological features were monitored.

Results: Nine polymethoxy flavonoids were identified from the extract. Treatment with C. sinensis peels extract recorded amelioration in all parameters.

Conclusion: Citrus sinensis petroleum ether peels extract had protective and curative effects against gastric ulcer. Therefore, the extract recorded anti-secretory, anti-ulcerative, anti-inflammatory, and antioxidant effects. Its healing action exceeded its protective role due to its richness in polymethoxylated flavonoids  相似文献   
414.
415.
Objectives:Osteoporosis because of physical inactivity is one of the major complications associated with neuromuscular disorders. The study aimed to compare using Suit therapy and whole-body vibration in addition to selected physical therapy program to improve Bone Mineral Density in children with cerebral palsy of spastic diplegia.Methods:Forty-six patients were classified randomly into two equal groups. Patients in the group (A) engaged in a selected physical therapy program, also besides, suit therapy training program while those in the group (B) received the same selected physical therapy program received by group (A) in addition to the whole-body vibration training program. The treatment programs were conducted three times per week for twelve successive weeks. Measurements obtained included bone mineral density at the lumbar spine as well as at the femoral neck. These measures were recorded pre- and post-treatment.Results:There was a significant improvement in favor of the whole-body Vibration group. Bone mineral density improved significantly at both the lumbar spine (P=.038) and the femoral neck (P=.005) in the WBV group as compared to the Suit therapy group.Conclusions:Whole-body vibration is effective in improving Bone Mineral Density rather than Suit therapy in children with cerebral palsy of spastic diplegia.  相似文献   
416.
A five-month male Arab child with clinical features of ring(14) is reported. He had recurrent seizures and chest infections, microcephaly, elongated face, short palpebral fissures, broad nasal bridge, long philtrum, fish-like mouth with thin lips, micrognathia, low-set ears and retinal pigmentation with yellow-white spots on the maculae. In addition brachydactyly of fingers and toes, hypoplastic scrotum and mental deterioration were present.  相似文献   
417.
The results obtained indicate that the Chrysoperia carnea collected from Giza region (where no insecticidal treatments were used), were more sensitive to malathion than those of Kafr El-Sheikh, where insecticides were used intensively. In predator colonies which were treated repeatedly with malathion, the sensitivity to malathion decreased from the first to the fifth generation. On the other hand, insects of the reference colony, showed a considerable increase in sensitivity within the same generations.  相似文献   
418.
Journal of Physiology and Biochemistry - Hepatic encephalopathy (HE) is a devastating neuropsychiatric presentation of the advanced hepatic insufficiency. It is associated with high morbidity and...  相似文献   
419.
Summary Acetylene-reducing activity and populations of diazotrophs were estimated simultaneously in Giza soils after harvest of wheat and maize crops. Amendment of soil with residues of either crop together with flood irrigation enhanced the development of diazotrophs and nitrogenase activities in the soil. Bacterial numbers and acetylene-reducing activity decreased as soils dried following flood irrigation. Activities decreased progressively with each cycle of irrigation following the original incorporation of organic matter. Nitrogenase activity in the soil was greater in the cooler winter than in summer.  相似文献   
420.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号