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61.
G. M. Rao P Sumita M Roshni M. N. Ashtagimatt 《Indian journal of clinical biochemistry : IJCB》2005,20(1):198-200
It has been suggested that antioxidant systems are impaired in pregnancy induced hypertension and hence patients are exposed
to oxidative stress. In order to investigate the relationship between lipid peroxidation and certain antioxidant parameters
in blood of pregnancy induced hypertension (PIH) cases, 25 normotensive and 23 PIH samples were studied. In the present study,
thiobarbituric acid reactive substances showed a tendency to increase, however the increase remained statistically insignificant.
Plasma ascorbic acid level remained unaltered and Vitamin E showed a tendency to increase in the study group. The findings
implicate oxidative stress in the disease and cite the biochemical rationale for clinical trials of antioxidants to prevent
and treat pregnancy induced hypertension. 相似文献
62.
P Renuka Devi S Krishna Kumari C Kokilavani 《Indian journal of clinical biochemistry : IJCB》2007,22(1):143-147
The effect of the oral administration ofVitex negundo leaf extract on the levels of enzymic and non-enzymic antioxidants were studied in the adjuvant induced arthritic (AIA) rats
The levels of antioxidant enzymes such as SOD, CAT, GPx, G6PD, GSH and Vit-C were estimated in various groups of the experimental
rats. It was observed that the antioxidant enzyme levels in the AIA were significantly low when compared to normal rats. A
significant decrease in enzymic antioxidant—SOD, CAT, GPx, G6PD and non-enzymic antioxidant—GSH, Vit-C were observed in the
liver of AIA rats compared to the normal rats. These results suggest that the leaf extract ofVitex negundo possesses antioxidant activity. 相似文献
63.
Devi CHANDRA ;Judha PURBOLAKSONO ;Yusoff NUKMAN ;Haw-ling LIEW ;Singh RAMESH ;Mohsen-abdel HASSAN 《浙江大学学报(A卷英文版)》2014,15(11):873-882
研究目的：在相同的反复张力下,研究V形切口圆条表面裂纹的疲劳扩展规律。研究方法：1.构建V形切口圆条模型（图1）,基于线性二次元将模型表面离散成一个个网格点（图2）;2.以AZ-6A-T5镁合金为例,利用J积分计算应力强度因数,利用NASGRO裂纹增长率模拟裂纹的疲劳扩展;3.通过研究不同的裂纹纵横比和对应的应力强度因数之间的相关性来研究裂纹的扩展。重要结论：1.在裂纹扩展时裂纹纵横比的初始值对断裂形状的发展有重要影响;2.裂纹纵横比对疲劳负荷寿命的作用比缺口半径更加明显;3.当裂纹前缘演变成一条直线形时可观察到不稳定的裂纹扩展;4.裂纹深度一定时,断裂纵横比越小,疲劳负荷寿命越短;5.当裂纹纵横比为0.6-0.7时,出现了不稳定的裂纹扩展。 相似文献