1) active free radical
活性自由基
1.
According to the coal large molecular structure forms,the producing of active free radical in the process of breaking and fracturing of coal and of low temperature oxidation of coal, as well as the spontaneous combustion mechanism of coal are discussed.
根据煤体的大分子结构形式，探讨了煤在破碎压裂过程中和低温氧化过程中活性自由基团的生成以及煤的自燃机理；分析了煤的变质程度、浮煤堆放蓄热环境和漏风供氧对煤炭自然氧化的活性自由基链式反应过程的影响；并将活性自由基链式反应理论用于解释黄泥灌浆、喷洒灌注阻化剂和注氮的阻燃机理。
2) Living radical polymerization
活性自由基聚合
1.
Living radical polymerization induced by radiation in the presence of dithiobenzoic acid;
硫代苯甲酸存在下辐射引发活性自由基聚合
2.
New trend of living radical polymerization Reversible addition-fragmentation chain transfer radical polymerization;
活性自由基聚合研究的新动态──可逆加成-断裂链转移自由基聚合
3.
Living radical polymerization has developed over the past decade into an effective means for macromolecular design.
活性自由基聚合经过十多年的发展,已成为一种有效的高分子设计手段。
3) ROS
活性氧自由基
1.
The scavenging ability on ROS was evaluated by means of fluorescence and chemiluminescence.
用精制的吴茱萸挥发油进行抗氧化研究,用荧光化学发光法测定了吴茱萸精油对活性氧自由基的清除作用。
2.
The DNA damage of peripheral blood lymphocytes wasexamined using comet assay, and the ROS level and MDA content in the liver were also detected.
为了研究亚急性铅暴露对小鼠的遗传毒性及氧化损伤的诱导,将不同剂量的醋酸铅对小鼠隔日灌胃4周,用彗星实验检测其外周血淋巴细胞DNA损伤,并测定肝组织中活性氧自由基(ROS)的水平和脂质过氧化主要终产物丙二醛(MDA)的含量。
3.
Objective To investigate the mechanism of oligomers Proanthocyanidins(OPC) on photo-protection of human melanocytes,we evaluated the effects of cellular cycle,intracellular reactive oxidative species(ROS) level and protein level of melanogenic enzymes in cultured human melanocytes following UV-irradiation by OPCs.
目的:研究葡萄籽提取物原花青素(OPC)对紫外线辐射后人表皮黑素细胞内活性氧自由基(ROS)清除、细胞周期变化以及黑素合成关键酶表达的影响,以探讨OPC对黑素细胞的光保护机制。
4) active oxygen free radical
活性氧自由基
1.
Objective: To study comparatively the effect of Guanxin Ⅱ and its constituents, including Salvia, Red Peony root, Chuanxiong, Safflower and Dalbergia wood, in scavenging active oxygen free radical (OFR) to explore their mechanism in overcoming the experimental acute ischemic myocardial injury and protecting myocardial tissue.
目的 :比较研究冠心Ⅱ号及其组成成分丹参、赤芍、川芎、红花、降香清除活性氧自由基 (OFR) ,克服实验性急性心肌缺血所致损伤及保护心肌组织的分子作用机制。
2.
The result showed that the active oxygen free radicals of riboflavin produced by irradiation with UV rays could obviously inhibit the mitosis of root cells,so the mitosis index was cut down.
以蚕豆根尖为材料，研究了核黄素在紫外光照条件下对细胞有丝分裂的影响，结果表明，核黄素在紫外光照条件下产生的活性氧自由基能明显的抑制有丝分裂，使有丝分裂指数明显下降，当核黄素浓度为０。
5) living free-radical polymerization
活性自由基聚合
1.
A amphiphilic block copolymer dispersant poly(styrene-b-acrylic acid)(PS-bPAA)was synthesized by reversible addion-fragmentation chain transfer(RAFT) living free-radical polymerization,using styrene(St) and acrylic acid(AA) as monomer,benzyl dithiobenzoate as chain transfer agent,2,2′-azobis(2-cyanopropane)(AIBN) as initiator.
以苯乙烯和丙烯酸为单体,二硫代苯甲酸苄酯为链转移剂,偶氮二异丁腈作为引发剂,采用可逆加成-断裂链转移活性自由基聚合方法合成了两亲性嵌段共聚物分散剂聚苯乙烯-b-聚丙烯酸(PS-b-PAA),探讨了影响聚合反应的主要因素,用GPC,IR,1H NMR对其结构进行了表征。
2.
A amphiphilic block copolymer dispersant poly(styrene-b-acrylic acid)(PS-b-PAA)was synthesized by reversible addion-fragmentation chain transfer(RAFT) living free-radical polymerization,using styrene(St) and acrylic acid(AA) as monomer,benzyl dithiobenzoate as chain transfer agent,2,2′-azobis(2-cyanopropane)(AIBN) as initiator.
以苯乙烯(St)和丙烯酸(AA)为单体,二硫代苯甲酸苄酯为链转移剂,偶氮二异丁腈(AIBN)作为引发剂,采用可逆加成-断裂链转移(RAFT)活性自由基聚合方法合成了两亲性嵌段共聚物分散剂聚苯乙烯-b-聚丙烯酸(PS-b-PA A),探讨了影响聚合反应的主要因素,用GPC、IR1、HNMR对其结构进行了表征。
6) active oxygen radicals
活性氧自由基
1.
If active oxygen radicals produce excessively or are cleared off slowly in the body, they lead to certain damage to biologic molecule and caused various related disease.
活性氧自由基是人体生命活动过程中生物化学反应的中间产物,如果体内的活性氧自由基产生过多或清除过慢,则对生物分子造成一定的损害,导致各种相关疾病的发生。
2.
The results manifested that sasanqua have stronger antioxidant capability, inhibition capability of TBARS formation in Fe2+ induced liposome and strong inhibition capability of oxidation of 2'-deoxyribose and could clear active oxygen radicals produced by the chemical reactions.
本文对所提取的油茶总皂苷进行定性分析并测定其含量,研究了对由亚铁离子引发的卵磷脂脂质过氧化的抑制作用、清除Fenton反应生成的羟自由基的能力、清除超氧阴离子自由基的能力、对脱氧核糖氧化损伤的抑制作用,实验结果显示油茶总皂苷具有显著的抗氧化性和对脱氧核糖氧化损伤的抑制作用,对化学反应生成的的活性氧自由基具有显著的清除作用。
3.
The active oxygen radicals of cultured bezoar have been studied by chemiluminescence.
运用化学发光技术研究了培植牛黄的活性氧自由基。
补充资料：N,N-二苯基N′-苦味基肼基自由基
分子式：
CAS号：
性质：一种稳定的自由基。紫色晶形固体。熔点130℃。室温下可长期稳定保存。DPPH可作为自由基检测试剂。当其与反应中产生的简单自由基结合时，可观察到紫色消失。
CAS号：
性质：一种稳定的自由基。紫色晶形固体。熔点130℃。室温下可长期稳定保存。DPPH可作为自由基检测试剂。当其与反应中产生的简单自由基结合时，可观察到紫色消失。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条