现代汽车自动变速器过热原因分析

自动变速器正常的工作油温为80～90℃,变速器工作温度过高,会造成油液过早氧化,特别是变速器的工作温度超过120℃时,油液中的抗氧化添加剂失效,油液氧化速度急剧地加快。     

健胃消食新煮意

准妈妈发现自己对着满汉全席都能做到泰山崩于前而色不变,都是春节惹的祸!健胃消食,我有新"煮"意!香菜不仅是厨房里必备的调味品,它还是健胃消食的保健蔬菜。香菜入肺经、胃经,性温、香气浓郁,有健胃消食、祛风解毒、利尿通便的作用。同时,香菜的营养成份也非     

夏季正当时:补充6大营养素

夏季高温时节,妈咪们可别忽略了宝宝的身体哦,及时补充6大营养素,好好调养宝宝身体才能安然度夏!     

浅谈人体营养的相对性

目前人们对营养的意识和观念在不断的转变,对营养的认识和要求越来越高.但是对营养素的生理功能理解不到位,存在许多误区.各种营养素只有合理搭配,平衡膳食在人体内才能发挥更好的作用.     

净化心灵

心灵的成长需要水和营养素,感恩就是最好的营养素,它来源于身体内部,无假外求。就像善良是浇灌心灵的水。感恩者因为感恩而洁净,心灵由此饱满与生长。这个回报大不大？很大,他们逐渐变为富有者。     

Inhibitive effects of anti-oxidative vitamins on mannitol-induced apoptosis of vascular endothelial cells

Objective： Study blood vessel injury and gene expression indicating vascular endothelial cell apoptosis induced by mannitol with and without administration of anti-oxidative vitamins. Methods： Healthy rabbits were randomly divided into four groups. Mannitol was injected into the vein of the rabbit ear in each animal. Pre-treatment prior to mannitol injection was per- formed with normal saline （group B）, vitamin C （group C） and vitamin E （group D）. Blood vessel injury was assessed under electron and light microscopy. In a second experiment, cell culture specimen of human umbilical vein endothelial cells were treated with mannitol. Pre-treatment was done with normal saline （sample B）, vitamin C （sample C） and vitamin E （sample D）. Total RNA was extracted with the original single step procedure, followed by hybridisation and analysis of gene expression. Results： In the animal experiment, serious blood vessel injury was seen in group A and group B. Group D showed light injury only, and normal tissue without pathological changes was seen in group C. Of all 330 apoptosis-related genes analysed in human cell culture specimen, no significant difference was seen after pre-treatment with normal saline, compared with the gene chip without pre-treatment. On the gene chip pre-treated with vitamin C, 45 apoptosis genes were down-regulated and 34 anti-apoptosis genes were up-regulated. Pre-treatment with vitamin E resulted in the down-regulation of 3 apoptosis genes. Conclusion： Vitamin C can protect vascular endothelial cells from mannitol-induced injury.     

永川秀芽的体外抗氧化及抗突变效果

对购买的永川秀芽进行体外抗氧化及抗突变效果评价。通过体外实验分析,研究永川秀芽的功能性效果。研究结果表明,高浓度的永川秀芽比低浓度茶具有更好的羟基自由基和DPPH自由基清除能力。1000mg／kg浓度永川秀芽也表现出最好的抗突变效果。综合分析得出,一定浓度的永川秀芽具有较好的体外功能性效果。     

亳菊保健啤酒研究

通过在啤酒发酵过程中添加不同比例的亳菊水提液,研究亳菊水提液添加浓度对啤酒风味和抗氧化能力的影响.研究发现,在啤酒后酵前加入3～4 g/L的亳菊参与发酵反应,能生产出兼具亳菊和啤酒独特风味、抗氧化能力强的亳菊保健啤酒.     

老鹳草鞣质体外抗氧化作用研究

目的：通过在体外研究老鹳草提取液中有效成分的抗氧化能力,来减少亚硝化反应及清除亚硝酸盐;方法：用丙酮超声提取老鹤草,提取浓缩液依次用氯仿、乙酸乙酯、正丁醇萃取,得到老鹳草总鞣质、乙酸乙酯萃取物和正丁醇萃取物.对这三种成分进行阻断亚硝胺合成测定和清除亚硝基测定.结果：在同一浓度下,其阻断率：乙酸乙酯萃取物＞正丁醇萃取物＞总鞣质,其清除率：乙酸乙酯萃取物＞正丁醇萃取物＞总鞣质.结论：在体外模拟胃液的条件下,老鹳草鞣质的总鞣质、乙酸乙酯萃取物、正丁醇萃取物能有效地阻断亚硝胺的合成及清除亚硝酸盐.     

抗癌佳果话山杏

"满园春色关不住,一枝红杏出墙来。"古人优美的诗句,高度概括了对杏的赞赏。阳春三月,远眺漫山遍野山杏树,错落有致、繁花似锦、微香袭人,不由联想起山杏味美与价值的不凡。正可谓"花奇、树成、果甘、仁香",四佳奇艳汇集一身而不虚小赞:虽无垂柳妖娆、白杨挺拔、青松俊美,但也春华秋实、坚韧质朴、无私无畏!为人类重点关注之佳果。