还原时间

The other was not exerting outside electric field and not adding redox reagents to control electropotential.

原生电位浮选工艺有两个要点：一是主要调节和控制包括矿浆pH值、捕收剂种类、用量及用法、浮选时间以及浮选流程结构等在内的传统浮选操作参数，二是不采用外加电极、不使用氧化—还原药剂调控电位，这两点为该工艺在现有浮选体系中实际应用及推广创造了条件。

By means of molecular designing, a series of sodium branched-alkyl benzene sulfonates weresynthesized through seven process, involving Frieded-Crafts reaction, Grignard reaction, sulfonationand neutralization. Those isomers have similar structure, carbons of same quantity, but the position ofalkylaryl dissimilarity. Liner fat acid, metaxylene and halogenated hydrocarbon of different carbonnumber were used as the starting materials. Optimum processing condition was confirmed consideringinfluence of a series of reaction factors such as feed proportioning, quantity of catalysts, quantitysolvent, reaction time, temperature and pressure. Eight kinds of isomers of sodium hexadecylxylolsulfonates were finally synthesized, and characterized by FT-IR.

本文通过分子设计，以不同碳数直链脂肪酸、间二甲苯以及不同碳数的卤代烷为原料，经酰基化、格氏反应、加氢还原、磺化及中和等反应，合成了结构相似、烷烃链碳数一定、芳基在烷烃链不同位置的烷基芳基磺酸盐同分异构体；并考察了原料配比、催化剂用量、反应时间、反应温度、溶剂用量、反应压力等一系列因素对各反应的影响，进而确定最佳工艺条件，最终合成出十六烷基二甲苯磺酸钠的八种同分异构体，利用 FT-IR 对产物结构进行了分析。

We selected the 2nd and the 3rd generation yeast with powerful vitality from the yeast mud fermented in tanks in working field as the ideal species source separated from yeast monoplast in beer and the ways to obtain them were as follows: 24 hours after deoxidisation of diacetyl to threshold value and decrease of its temperature to 5℃ was the best time for selection and sample－extraction location was at the nozzle of pressure－discharge pipes.

摘 要：从生产现场大罐发酵的酵母泥中选取第2～3代生命力强的酵母作为啤酒酵母单细胞分离的理想种源，选取的最好时间为双乙酰还原至阈值后降温至5℃，并让其停留24h时取样位置为排压酵母的管口，最后将所得菌种进行初选、复选或模拟生产恒温培养鉴定，选出优良菌株。

The optimal conditions for reaction were as follow:the initiator was ammonium persulphate with sodium pyrophosphate syste...

实验确定的最佳反应条件是：引发剂用过硫酸铵-焦磷酸钠氧化还原引发体系，其用量为单体总量的0.4%~0.5%；复合乳化剂选用非离子表面活性剂(TX-10)和混合阴离子表面活性剂复配的复合乳化剂，其最佳用量为单体总量的4.0%~5.0%；反应温度为85~90℃；单体预乳化液滴加时间为3 h左右。

Using one chiral ligand of each type respectively to investigate the infection of the structure and the amount of chiral ligands, the structure of reactant, the temprature and duration, solvent and reductive metal in pinacol coupling reactions.

三、系统考察了手性配体的结构和用量、底物结构、反应温度、时间、溶剂及还原金属对Pinacol偶联反应的化学产率、非对映选择性和对映选择性的影响。

Thirdly, in order to get the high temperature sterilization method of Typha latifolia.L, the effect of intensity, time and temperature of sterilization on the color score, shear force, color difference, ascorbic acid content is measured. The optical high temperature sterilization method is to heat the raw material of Typha latifolia.L in water at 100℃ for 4min then cool fast, after vacuum package the Typha latifolia.L is sterilized at 115℃ for 15.92min and then cool entirely.

再次，为了得到蒲菜的合适高温杀菌条件，分别研究了杀菌强度、杀菌时间、杀菌温度对蒲菜的色泽感官评分、剪切力、色差、还原 Vc 含量的影响，最终得到了蒲菜的高温杀菌工艺为：将蒲菜 100℃热烫 4 分钟后快速冷却，真空包装后在 115℃杀菌 15.92 分钟后彻底冷却即成。

And the acetylating time influences derivatizationsignificantly.

结果表明，还原温度和乙酰化时间的影响最为显著。

The influence of carbonizing temperature and time was investigated by XRD in this study. The morphology and particle distribution of the powder were observed by SEM.

根据X射线衍射图研究了直接还原碳化温度及时间对反应产物的影响，用扫描电镜观察了粉末颗粒形貌和粒度分布。

He growth process of silver particles with adsorption time is that the reduced silver precursors coalesces into silver particles, branch-shaped silver particles and larger silver pieces, step by step.

EM观察发现：随吸附时间延长，还原的Ag粒从小颗粒状发展到类树枝状的颗粒并最终形成Ag片；相应的电子衍射图也表明，Ag的结晶聚集体形态变化是：无定形→多晶→大银片。

The results enunciationed that the decomposes by to be oxidized at the same time to be deoxidized while having no the oxygen exist.

研究结果表明：在无条件下的脱除同时存在氧化与还原两条途径；的脱除率随电极间电压、放电时间的增加而增加。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。