迷迭香中抗氧化剂总酚含量的测定     

樊红日  李健  陈宝  沈芳  张立颖 《大众科技》2016,(8)

通过对春、秋、冬三季迷迭香干料和春季鲜料提取得到的抗氧化剂进行总酚含量测定,得出干料提取得到的抗氧化剂总酚含量比鲜料高,且秋季迷迭香干叶制得的抗氧化剂的总酚含量最高,达到297mg/g,因此抗氧化剂的提取最好选择秋季干叶为原料。  相似文献   

Role of Oxidative Stress in Various Stages of Psoriasis     

Kadam DP  Suryakar AN  Ankush RD  Kadam CY  Deshpande KH 《Indian journal of clinical biochemistry : IJCB》2010,25(4):388-392

Psoriasis is a chronic inflammatory, proliferative skin disease characterized by pathological skin lesions due to various exogenous and endogenous factors. It is associated with a number of biochemical and immunological disturbances. Recently, it has been suggested that increased reactive oxygen species (ROS) production and compromised function of antioxidant system may be involved in the pathogenesis of this disease. In the present study, 90 psoriasis patients were selected. Disease severity was assessed by psoriasis area severity index score and grouped as mild, moderate and severe (each group consists of 30 subjects) and compared with 30 healthy controls. Serum levels of malondialdehyde, nitric oxide end products and the activities of antioxidant enzymes such as erythrocyte-superoxide dismutase, catalase and total antioxidant status were investigated in these groups/subjects. As compared to controls, we found severitywise significantly increased serum malondialdehyde, nitric oxide end products with decrease in erythrocyte-superoxide dismutase activity, catalase activity and total antioxidant status in patients with psoriasis suggesting worsening of the disease. It seems to be linked with the enhancement of Reactive Oxygen Species production and decreased antioxidant potential in psoriasis.  相似文献   

Hypoglycemic, hypolipidemic and antioxidant properties of combination ofCurcumin fromCurcuma longa, Linn, and partially purified product fromAbroma augusta, Linn. in streptozotocin induced diabetes     

Halim Eshrat M. Ali Hussain 《Indian journal of clinical biochemistry : IJCB》2002,17(2):33-43

Dietary spice components ofCurcuma longa andAbroma augusta have been screened for their protective effect against reactive oxygen species induced lipid peroxidation. They have been found to be efficient antioxidant when administered in combination. The purpose of the study was to investigate the effect of oral administration (300mg/Kg) of the aqueous extract of turmeric whose active ingredient isCurcumin andAbromine powder as a hypoglycemic agent mixed with diet. The effect of this aqueous extract on blood glucose, lipid peroxidation (LPO) and the antioxidant defense system in rat tissues like liver, lung, kidney and brain was studied for 8 weeks in streptozotocin induced diabetic rats. The administration of an aqueous extract of turmeric and abromine powder resulted in a significant reduction in blood glucose and an increase in total haemoglobin. The aqueous extract also resulted in decreased free radical formation in the tissues studied. The decrease in thiobarbituric acid reactive substances (TBARS) and increase in reduced glutathione (GSH), superoxide dismutase (SOD) and catalase (CAT) clearly showed the antioxidant property of the mixture. It is suggested that these changes initially counteract the oxidative stress in diabetes however, a gradual decrease in the antioxidative process may be one of the factors which results in chronic diabetes. These results indicate that the mixture of the two plants have shown antidiabetic activity and also reduced oxidative stress in diabetes. A combination ofAbroma augusta and Curcuma longa also restored the other general parameters in diabetic animals. The results were statistically analyzed and indicated that combination of herbal extracts showed better efficacy as compared to individual herbal plant extracts used.  相似文献   

区域创新系统外生结构性风险的识别及其解耦分析   总被引：1，自引：0，他引：1  

贾晓霞  周溪召 《科学学与科学技术管理》2006,27(5):70-74

基于对区域创新系统（RIS）的理论回顾,指出了忽视RIS的外生性风险管理是部分地区区域创新系统衰退的重要原因.提出了区域创新系统外生结构性风险的概念和因素构成,给出了各要素之间的耦合关系,基于管理熵进一步构建了该耦合关系的量化描述模型,为区域创新系统外生结构性风险管理走向实用化奠定了基础.  相似文献   

外源风险认知对幼儿体育参与行为的影响及解决策略     

全海英  刘旭阳  孔维峰 《浙江体育科学》2011,33(6)

幼儿体育参与行为对幼儿健康体质的形成会产生极大影响。文章分析探讨了影响幼儿体育参与行为的外源性风险认知因素,其认知主体主要包括：父母、幼儿园和其他监护人（祖父母或外祖父母）,阐明不良的外源风险认知对幼儿体育参与行为会产生消极影响,并给出促进幼儿体育参与行为的积极性策略。  相似文献   

对影响短跑成绩提高的外源性生物力学因素的研究     

李坚 《吉林体育学院学报》2010,26(3):37-38

影响短跑成绩提高的因素很多,其中外源性生物力学因素容易被大多数教练员忽视。外源性生物力学因素属力学类范畴,它是由身体质量、空气助力和地球的引力等构成。通过对影响短跑成绩提高的这些力学因素,对如何通过训练手段、鞋、服装以及运动场地的设计来克服这些力学因素,以求达到提高速度的目的。  相似文献   

健身气功调心途径研究     

王美娟  司红玉  于美刚 《山东体育学院学报》2010,26(9)

采用文献资料、逻辑分析法对健身气功的调心途径进行研究,认为:调心在"三调"中起主导作用; 由直觉体悟得出调心的过程可分为"外天下"、"外物"、"外生"三个阶段,分别经过寡欲、"抱一"、涵养道德三条层层深入的途径,来实现调心的目的和结果.  相似文献   

Iterative learning control of SOFC based on ARX identification model     

HUO Hai-bo ZHU Xin-jian TU Heng-yong 《浙江大学学报(A卷英文版)》2007,8(12):1921-1927

This paper presents an application of iterative learning control (ILC) technique to the voltage control of solid oxide fuel cell (SOFC) stack. To meet the demands of the control system design, an autoregressive model with exogenous input (ARX) is established. Firstly, by regulating the variation of the hydrogen flow rate proportional to that of the current, the fuel utilization of the SOFC is kept within its admissible range. Then, based on the ARX model, three kinds of ILC controllers, i.e. P-, PI- and PD-type are designed to keep the voltage at a desired level. Simulation results demonstrate the potential of the ARX model applied to the control of the SOFC, and prove the excellence of the ILC controllers for the voltage control of the SOFC.  相似文献   

Evaluation of antioxidant properties of berries     

P. Rani  K. Meena Unni  J. Karthikeyan 《Indian journal of clinical biochemistry : IJCB》2004,19(2):103-110

The present paper focuses on assessing the levels of various enzymatic and non-enzymatic antioxidants in selected berries of Indian sub-continent viz., gooseberry, grapes, orange and tomato. This study has revealed that orange, tomato and grapes possess predominant quantities of enzymatic antioxidants namely SOD, catalase and glutathione peroxidase respectively. The levels of antioxidants analyzed namely reduced glutathione, vitamin C and vitamin A were maximal in grapes, orange and tomato respectively. All the extracts of berries included in the present study inhibited iron inducedin vitro lipid peroxidation in erythrocytes, the extend of inhibition being highest for gooseberry and orange compared to tomato and grapes which could be attributed to their in-built antioxidant system.  相似文献   

产业集群竞争力的形成机制分析   总被引：7，自引：0，他引：7  

刘爱中  邹冬生  周文新 《科学学与科学技术管理》2006,27(5):95-101

基于产业集群的特性和相关理论,分别从内源形成机制和外源形成机制的角度,剖析了产业集群竞争力形成和强化的驱动因素,旨在为提升产业集群竞争力提供理论指导.  相似文献