The effect of tannic acid on preoxidation by potassium permanganate was studied.
考察了单宁酸对高锰酸钾预氧化强化混凝的影响。
参考来源 - 水中单宁酸对强化混凝除污染的影响研究The optimum preoxidation conditions of Yangquan anthracite are obtained:300℃,3h,on the basis of optimum preoxidation conditions,the yield of BPCA to coal is 28.95%（daf）,about more than 4.51%of that One-stage method.
结果表明,阳泉无烟煤最佳预氧化条件为:300℃;3h,此条件下处理的煤样,在碱溶液中最佳氧化条件下苯多羧酸对煤的产率为28.95%(daf),与原煤相比相对提高4.51%。
参考来源 - 无烟煤两段氧化及产物异构化制对苯二甲酸·2,447,543篇论文数据，部分数据来源于NoteExpress
Carbon fiber is produced by dry-wet spinning of copolymerized PAN followed by preoxidation and carbonization.
本文采用干湿法纺制共聚丙烯腈纤维，并进行预氧化，碳化制成碳纤维。
The result showed that the preoxidation temperature and laying thickness had a critical effect on the properties of the fiber.
结果表明，预氧化温度和铺丝厚度是影响纤维性能的关键因素。
When the time of preoxidation was same, the combining intensity of alloy-porcelain decreased with the time prolonging of degassing.
在相同的预氧化时间的条件下，金-瓷结合强度随除气时间延长也呈递减趋势。
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