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1 At a reaction temperature of 100 ℃ and a reaction time of 30 min to give 2,which was then subjected to condensation reaction with p-propoxy mandelic acid in the presence of phosphoric acid at a molar ratio of m(2)∶m( p-propoxy mandelic acid )∶m=1∶1∶1 at a reaction temperature of 60 ℃ for 3 h to yield 3,which was further oxidized by chloranil to give t.
对现有分散红356合成工艺进行了优化，以n∶n=1.2∶1投料，100℃反应30 min得缩合物2，再在等质量磷酸催化下与分批加入的等质量对丙氧基扁桃酸60℃缩合3 h得缩合物3，经温和氧化剂四氯苯醌氧化得标题化合物，总收率55%。
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Your TOX screen came back positive for...
你的总氧化剂结果阳性。。。
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The highest total flavonoid rate was 1.127%. An all-round evaluation for the antioxidant activity of the flavonoids extract from zizania-bract was carried out with that of ascorbic acid as the control. The evaluation indexes included the cleanup rate of the polyphenolic extract towards superoxidized anionic radicals, hydroxyl radicals, DPPH free radicals, the deoxidizing ability, and the antioxidant activity towards the peroxidize of lipids and edible oils.
采用抗坏血酸作为对照，全面测定了茭白苞叶总黄酮对超氧阴离子自由基、羟基自由基、DPPH自由基的清除率，以及还原能力、抗脂质过氧化活性和对食用油脂的抗氧化性的影响，结果表明，白苞叶中的总黄酮是一种有开发价值的天然抗氧化剂。
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In this article, the factors that affect molecular weight and solubility of polyacrylamide are studied and suitable initiator system is selected. The optimum parameters of copolymerizing process are obtained as follows: the molar proportion of acrylamide and sodium acrylate is 7:3, the monomer concentration is 30%, pH value of solution is 12, the oxidizer (K2S2O8) concentration is 0.1%, the reducing agent (NH2CONH2) concentration is 1%, the chain-transfer agent concentration is 0.4%. The initial reaction temperature is 35℃.
讨论了影响聚丙烯酰胺分子量和溶解性能的因素，选取了合适的氧化-还原引发体系，确定了制备超高分子量速溶型部分水解聚丙烯酰胺的优化聚合工艺参数：起始共聚合反应温度为35℃，保持在密闭条件下的共聚合反应2.5h后，再将聚合反应温度升高到55℃，继续反应2h，反应结束；反应溶液单体总浓度：30％，共聚合反应溶液pH值：12，氧化剂K_2S_2O_8：0.1％，还原剂NH_2CONH_2：1％，共聚合反应中两种单体的投料比：丙烯酰胺：丙烯酸钠=7：3，异丙醇链转移剂：0.4％。
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Astragaloside IV：黄芪甲苷
[产品名称]:黄芪提取物-黄芪甲苷(astragaloside iv)黄芪总苷 98%,黄芪多糖L-抗坏血酸棕榈酸酯是一种高效的抗氧化剂和氧清除剂,被世界卫生组织(WHO)食品添加剂委员会评定为营养、高效、使用安全的食品添加剂,是我国唯一可用于婴幼儿食品的抗氧化剂,
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Phenolic：酚的
在29天的试验中,研究人员将参加试验者分为两组,然后在两组人员每天的饮食中分别增加4大汤匙两种抗氧化剂含量不同的荞麦蜂蜜. 结果对这两组人所作的血液化验显示,他们体内酚的(phenolic)总数量都升高了.