Results 11 to 20 of about 706 (99)
Multivariate Analysis of Reactive Oxygen Species Metabolism of Strawberry Treated with Gas Impingement(气体冲击处理对草莓活性氧代谢影响的多变量解析) [PDF]
Shipin kexue jishu xuebao, 2015 The effects of individual treatments with gas impingement on fruit quality and reactive oxygen species metabolism of strawberries were analyzed by one-way analysis of variance, principal component analysis (PCA), partial least squares regression (PLSR ...
LI Liping(李丽萍) +4 more
doaj +1 more source
Inhibitory Effect of Russula farinipes Romell Polysaccharide on Mice Liver Senescence(红菇多糖对小鼠肝脏衰老的抑制效果) [PDF]
Shipin kexue jishu xuebao, 2017 Effects of Russula polysaccharide on mice hepatic insufficiency were investigated in this study. The senile model mice were established by D-galactose and mice were treated by 75mg/L and 150mg/L Russula polysaccharide.
WEI Jie(魏杰) +5 more
doaj +1 more source
Effects of Precise Temperature Control Storage on Postharvest Quality and Physiological Changes of Broccoli(精准温控贮藏对西兰花采后品质和生理变化的影响) [PDF]
Shipin kexue jishu xuebao, 2021 In order to explore the physiological changes and quality differences of broccoli stored under different temperatures, the picked broccoli was stored in three kinds of environments:ordinary refrigerator [(4.0±1.0)℃], precise temperature control freezing ...
ZHANG Peng(张鹏) +4 more
doaj +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2005 氨态氮和亚硝态氮是虾类养殖环境中最主要的污染物.在1 mg/L非离子氨态氮和1 mg/L亚硝态氮的作用条件下，罗氏沼虾血清、肝胰腺和肌肉中的酚氧化酶、超氧化物歧化酶、碱性磷酸酶及酸性磷酸酶活力变化不同，经1、4、7及10天处理后，血清和肌肉酚氧化酶活力均有所降低，而肝胰腺的酚氧化酶活力则略有增高；各组织中的超氧化物歧化酶活力基本变化过程为，先增高后降低；各组织的两种磷酸酶活力则有不同程度的增高.酚氧化酶与超氧化物歧化酶活性可作为判断虾类免疫抗病能力的指标，而两种磷酸酶活性则仅可作辅助参数.
WANGYue(王玥) +2 more
doaj +1 more source
Antioxidant Activities of Collagen Peptides from Silver Carp Scale(鲢鱼鱼鳞胶原蛋白肽抗氧化作用研究) [PDF]
Shipin kexue jishu xuebao, 2014 Antioxidant activities of sliver carp scale collagen peptides -SCSCP- were investigated. SCSCP was separated by ultrafiltration using the Omega membranes with molecular weights cut-off of 5, 3, and 1ku. Antioxidant activities of ultrafiltration fractions
CHEN Ri-chun(陈日春) +3 more
doaj +1 more source
Structure and evolvement of Spirulina platensis Fe-SOD(钝顶螺旋藻Fe-SOD的结构与进化)
Zhejiang Daxue xuebao. Lixue ban, 2005 超氧化物歧化酶（Superoxide dismutase，SOD）是一类重要的具有抗氧化损伤功能的金属酶.利用生物信息学手段，分析了钝顶螺旋藻(Spirulina platensis)Fe-SOD的结构与进化，结合此蛋白的功能，揭示了两者的内在联系：在结构上，此蛋白的中间区城(26 AA~160 AA）结构紧凑，为酶的活性中心，两端区域离活性中心较远；在进化上，此蛋白两端区域较中间区域更倾向于发生突变.并且通过Fe-SOD，首次对以上三者间特殊关系的形成机制进行了猜想与假设.
LUMin(卢敏) +4 more
doaj +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2003 以浙春3号大豆为研究材料,设置了不同的钼、硼水平,研究了钼、硼浸种对大豆种子的萌发和幼苗生理特性的影响.结果表明:低浓度钼或硼有利于大豆种子的萌发,钼、硼浸种时间以12 h最佳,钼浸种或不过量硼浸种将增加大豆幼苗的呼吸速率,提高过氧化物酶(POD)、过氧化氢酶(CAT)和超氧化物歧化酶(SOD)等抗逆性酶的活性,降低质膜透性(MP)及丙二醛(MDA)和脯氨酸(Pro)的含量,中等浓度的钼、硼浸种效果最显著,而高浓度硼浸种将产生相反的效果.
LIUPeng(刘鹏), YANGYu-ai(杨玉爱)
doaj +1 more source
Zhongguo shiyan zhenduanxue, 2021 目的探究没食子酸(GA)对辐射损伤小鼠肝脏抗氧化酶含量的影响和降低脂质过氧化程度的作用。方法小鼠在接受X射线辐照前经由胃肠道途径给予GA(50、100和200mg/kg),连续14d,每天1次。第15天均进行一次性X射线全身均匀辐照(阴性对照组除外),辐照剂量分别为1.0、3.0和4.0Gy。辐照后24h处死小鼠,取小鼠肝脏检测肝组织中过氧化氢酶(CAT)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)的活性值和丙二醛(MDA)含量。结果 200mg/kg GA组小鼠肝脏中CAT、SOD ...
薛琦 +5 more
doaj
ESR study of free radicals photoinduced by C60 solution(C60光敏反应产生自由基的ESR研究)
Zhejiang Daxue xuebao. Lixue ban, 2002 富勒烯(C60)的吡啶溶液在光辐射下,以5,5-二甲基-1-吡咯啉-N-氧化物(DMPO)为捕捉剂,用电子自旋共振法(ESR)直接检测到很强的ESR信号,证明C60在光辐射下有自由基产生.通过计算机的ESR模拟和分析,认为得到的ESR信号为[DMPO-O2-]·与[DMPO-OH]·的叠加信号.当分别用超氧化物歧化酶和甘露醇为清除剂时,ESR信号明显降低,证明在光辐射下产生的自由基为超氧阴离子自由基()和羟自由基(OH·).
FENGYa-fei(冯亚非)
doaj +1 more source
Zhongguo shiyan zhenduanxue, 2007 目的通过UVB照射导致的角朊细胞中丙二醛（MDA）、羟自由基（OH.）和超氧阴离子（O2-）水平的改变和清除这些物质酶类含量和活性的改变,探讨B段紫外线对角朊细胞的损伤作用及机制。方法实验组的角朊细胞用UVB进行照射,对照组细胞用普通日光灯照射。分别测定并比较实验组和对照组细胞产生MDA、OH.和O2-的水平以及两组之间谷胱甘肽过氧化物酶、超氧化物歧化酶的改变,探讨UVB导致角朊细胞的损伤作用及机制。结果实验组角朊细胞产生的MDA、OH.和O2-的水平显著高于对照组 ...
李云 +5 more
doaj