Antioxidant and lipid lowering activities of Indian black tea     

Ramesh Chander  A. K. Khanna  Kanwal Raj  A. K. Rastogi 《Indian journal of clinical biochemistry : IJCB》2005,20(1):153-159

Indian black tea; CTC leaf and dust, produced by Tata Tea Limited, Kolkata, (India) was studiedin vitro as potential scavenger of oxygen free radicals. Super oxide anions were generated in a system containing xanthine—xanthine oxidase (enzymic system) and by NADH- phenozine methosulphate (non enzymic system). Anions were assayed in terms of uric acid formation and reduction of nitroblue tetrazolium salt, which were shown to be suppressed by tea extracts. Extracts from both leaf and dust also inhibted the formation of hydroxyl radicalsin vitro in the enzymic system comprising hypoxanthine—Cu⁺²—sodium ascorbate and xanthine oxidase and in non enzymic system of deoxyribose—Cu⁺²—sodium ascorbate and H₂O₂ as well as the Cu⁺² induced lipid peroxidation in human low density lipoprotein. Feeding with black tea in normal rats for sixty days increased their antioxidant activity and their liver microsomes were shown to be protected against peroxidation of lipids as stimulated by metal ions with enzymic or non enzymic reactants. Furthermore feeding with tea extracts in normal as well as triton WR—1339 induced hyperlipidemic rats caused decrease in their plasma levels of total cholesterol, phospholipids and triglycerides. The antioxidant and lipid lowering activities of both extracts from CTC leaf and dust tea was comparable and may be due to the presence of natural products like catechin and others.  相似文献   

寒地黑土经济可持续发展探析   总被引：1，自引：0，他引：1  

王淑芳 《绥化学院学报》2006,26(2):56-58

寒地黑土的稀缺性、脆弱性决定了保护黑土地是寒地黑土经济可持续发展的基础;确保农产品安全、优质,走绿色农业之路,是寒地黑土经济可持续发展的必然要求;农村各项事业协调发展是寒地黑土经济可持续发展的重要保障。  相似文献   

论欧盟特许经营法的最新发展     

汪传才 《西北师大学报》2005,42(2):114-120

欧盟对特许经营的规制,是从竞争法的角度出发的,它关注的焦点是特许经营合同有无限制竞争,或影响 成员国间贸易,而对于特许人与受许人之间的关系的调整,交由国内立法去完成。因此,有关特许经营立法当然构成 欧盟竞争法的一部分。本文介绍了有关欧盟特许经营立法的立法背景、立法改革,现行立法的主要内容,以及对特许 行业产生的影响,并希望其立法方法、立法内容对我国特许经营立法有一定的借鉴作用。  相似文献   

《黑骏马》的原始主义解读     

刘淑莉 《丹东师专学报》2006,8(2):110-112

原始主义文学的主要特征是以原始批判现代文明.作家以艺术的笔触深入到历史深层和民族文化的内核,去探究民族文化的审美价值、精神特质和人文理想.  相似文献   

Gas chromatographic method for the determination of hexaconazole residues in black tea     

Karthika C  Sachin PJ 《Journal of Zhejiang University. Science. B》2008,9(2):160-164

A highly reliable, quantitative and sensitive analytical method for determining the residues of the fungicide, hexaconazole in black tea is described. The proposed method is based on liquid-liquid extraction followed by gas chromatographic determination, using nitrogen phosphorus detector (GC-NPD) for the identification and quantitation of hexaconazole. The most was cleaned up by adsorption column chromatography using activated florisil. Performance of the method was assessed by evaluating quality parameters such as recovery value, repeatability, reproducibility, linearity and limits of detection and quantitation. When the method was assessed for repeatability, the percentage of recovery ranged between 86% and 96% while the relative standard deviation was between 0.30% and 2.35%. In studies on reproducibility the recovery ranged from 81% to 85% and relative standard deviation from 1.68% to 5.13%, implying that the method was reliable. A field trial was conducted to verify the application of this method with real samples. Results prove that the validated method was suitable for extracting hexaconazole residues.  相似文献   

华裔女儿成长的困惑和艰辛 --解读汤亭亭的《女勇士》     

李淑春 《黄冈师范学院学报》2005,25(1):29-32

通过解读华裔作家汤亭亭的《女勇士》，探索华裔在成长的过程中所承受的来自中华传统化的重负和美国化的排斥，揭示华裔少女在两种化夹缝中成长的困惑和艰辛，展现华裔在民族融合过程中所付出的代价与得到的收获。  相似文献   

Talking Spirituality with Family Members: Black and Latina/o Children Co-researcher Methodologies     

Nadjwa E. L. Norton 《The Urban Review》2006,38(4):313-334

Children in public schools challenge people’s conceptions of them by talking about their spiritualities and spiritual practices. Based on a one-year multicultural feminist critical narrative inquiry, this article examines how Black and Latina/o first grade children co-researchers interview family members to think about their beliefs, encourage others, and to acquire more spiritual knowledge. I provide three counterstories in which children choose a mother, an older sister, and a younger brother to interview. These counterstories demonstrate children’s diverse literacies and spiritual practices, and families’ involvement in children’s lives. I discuss implications for educational practices in support of Black and Latina/o children and their families. I highlight ways pedagogical practices can be critiqued and transformed in order to better support children.Dr. Nadjwa E. L. Norton is an Assistant Professor in the Literacy Department at City College, CUNY. Her scholarship focuses on multiple literacies practices, spirituality, teacher education, equity-oriented multicultural education, and collaborative qualitative research designs. Address correspondence to Dr. Nadjwa E. L. Norton, Department of Literacy NAC 6/207, The City College of New York, 138th Street & Convent Avenue, New York, NY 10031, USA; e-mail: nnorton@ccny.cuny.edu.  相似文献   

恒星演化     

刘俊红  张彩霞  钮蒸 《石家庄学院学报》2003,5(3):11-13

简单叙述了恒星的诞生、演化及衰亡 ,展示了恒星的存在历程 ,同时表明了恒星这类重要天体的起源及演化规律。描绘出了恒星在星际气体尘埃中诞生 ,在主星序阶段稳定演化 ,最后以白矮星 ,中子星或黑洞告终的一生经历轮廓。  相似文献   

Mentor-shape: exploring the mentoring relationships of Black women in doctoral programs     

S. Rasheem  Ali-Sha Alleman  Dawnsha Mushonga  Darlene Anderson  Halaevalu F. Ofahengaue Vakalahi 《Mentoring & Tutoring: Partnership in Learning》2018,26(1):50-69

Using a Black Feminist Thought framework, this phenomenological study focused on lived experiences with mentoring relationships among 38 Black women in doctoral programs in multiple disciplines across universities in the United States. Although emerging studies on Black women in academia acknowledge the significance of mentorship and the reality of discrimination at the intersection of race and gender, the literature lacks empirical support pertaining to the formation and outcomes of mentoring relationships, specifically for Black women in doctoral education. Findings from this study suggested four central themes in the mentoring relationships among Black women in doctoral programs: (a) organic evolvement, (b) shared identity/mutual interest, (c) personal transformation and (d) increase in access and opportunity. Implications for future research, policy, practice and education across disciplines are offered.  相似文献   

我国现代木版画黑白语言的解读与建构     

陈菽现 《北京城市学院学报》2007,(4):81-85

“黑白“在我国美术世界中的重要地位有其历史的渊源。黑白木版画之所以具备丰富的艺术表现力,乃是缘于“黑白“的社会学与美学特性,同时也基于现代艺术心理学之科学依据。现代黑白木版画的创作是主体思维过程特征的一种反映,因此,必须在形象思维的基础上,充分发挥抽象思维的重要作用,使作品兼备观赏性的黑白形式美感和艺术性的黑白内美的特征,以利于我国现代黑白木版画语言的建构。  相似文献