查询词典 ester value

And to getting together craft of synthesis of glycerine tristearin acerbity ester undertakes optimizing, discovery optimizes what obtain after craft to get together the performance of glycerine tristearin acerbity ester is better, hlb value is 8.5 ～ 9.8, exterior tension is 45 ～ 49mn/m, epispastic force is 18 ～ 20mm.

并对聚甘油硬脂酸酯合成工艺进行优化，发现优化工艺后获得的聚甘油硬脂酸酯的性能较好，hlb值为8.5～9.8，表面张力为45～49mn/m，发泡力为18～20mm。

At the same time, the enthalpy change of 212 kJ/mol for Tempo trapping methyl radical, namely O-〓 bond dissociation energy has been also obtained. This value is close to that of nitrous acid ester and far less than that of nitric acid ester. It is probably due to the relatively strong electron withdrawing capability of nitryl group.

同时我们还测得了甲基自由基与Tempo的反应的焓变，即O—〓键离解能为212 kJ／mol，它接近于亚硝酸甲酯中C—O键的离解能，而小于硝酸甲酯中的键离解能，这可能和硝酸根的吸电子能力较大有关。

With the observation of the outward appearances, it can be known roughly that if the sample was added with adulterations. Since the beeswax dissolves in the benzene but the adulterations, such as gypsum, starch and so on do not, these can be determined. By the verification of acid value and alcohol dissolve ability, the acid or non acid added can be determined. By the change of saponification value, the ester or non ester added can be determined. By the carbonification degree in the concentrated sulphuric acid, the mineral wax, such as paraffin wax added can be determined.

通过样品外观的观察初步定性是否掺有杂质；利用纯蜂蜡在苯中溶解，而掺入的石膏、面粉和淀粉等杂质在苯中不溶而定量鉴定这类杂质；由酸值变化和乙醇溶解物的量，测定掺入的硬脂酸等酸性物质或其它的非酸性物质；由皂化值变化，定量测定掺入的动物脂等酯类物质或其它的非酯类物质；根据蜂蜡中的烃类在浓硫酸中可被炭化，加入的石蜡等矿物蜡不被炭化来测定此类掺杂物。

After 3 months storage, our result showed that (1) color a value of rose liqueur with sucrose treatment had a slower decreased than with fructose treatment,(2) the sample added with caffeic acid or ferulic acid or tea polyphenol showed no significant difference in the color, anthocyanins content, and antioxidant capacity during storage as compared to control, and (3) the total amount of volatile compounds of rose liqueur decreased gradually, however there was one ester volatile formed, hexadecanoic ethyl ester, during storage.

贮藏三个月发现，(1)以果糖勾兑者在储藏试验中，其红色度下降速度较以蔗糖处理者快，建议仍以非还原糖进行勾兑对日后酒液保存较易，且酒液最好能予以避光包装，以避免颜色品质的下降；(2)添加不同之多酚类化合物时发现，添加caffeic acid、ferulic acid和茶多酚对酒液色泽、花青素含量、以及抗氧化能力之降低速度与控制组并无显著性的差异。(3)酒液储藏三个月后，其香气高级醇均有减少之趋势；但有hexadecanoic acid， ethyl ester酯类出现。

The production process of fatty acid methyl ester with high acid value acidulated oil and fatty acid replaced superior quality fat and oil by high temperature gas phase method and supplemental ester translation process was also introduced.

对间歇式酯化-酯交换工艺进行了具体分析，并着重介绍了采用高温气相法及补充酯交换工艺，以高酸值酸化油和脂肪酸代替高档油脂生产脂肪酸甲酯的生产工艺。

The synthesized high ester valuePVSK was characterized and compared with high ester value PVSK sample from Japanese company.

用红外光谱法对合成的高酯化度PVSK进行了表征，并与日本生产的高酯化度PVSK进行了比较。

The effect of polymerization degree and hydrolysis degree of PVA on the ester value of PVSK was discussed. The best selection of PVA for high performance PVSK was decided.

讨论了PVA聚合度和水解度对PVSK酯化度的影响，确定了制备高性能PVSK对PVA的选择性。

The potassium polyvinylsulfate was synthesized by using different types of polyvinylalcohol, the ester value of the PVSK was determined by the method of BaCl2 titration.

摘 要：用不同牌号的聚乙烯醇制备聚乙烯醇硫酸钾，用BaCl2滴定法测定了它们的酯化度。

In the process of the synthetic experiment with the pearlizer, the researchers focus their efforts on the exploration of the following areas concerning the artificial pearliser:(1) the material ratio (2) the amount of the catalyst used (3) the effect of such technological conditions as temperature and time on the performance of the final product, and (4) the ester value, acid value, yield rate, and appearance.

在这次珠光剂的合成实验中，我们主要从以下凡个方面进行了探索研究工作：(1)原料配比。(2)激活剂用量。(3)温度、时间等合成工艺条件对产品性量的影响。

The effect of single factor indicated that lower concentration of tea polyphenols and oxidant, temperature, ester proportion and pH value, shorter reaction time were favorable to the formation and accumulation of TFs, higher concentration of tea polyphenols, temperature, ester proportion and pH value, longer reaction time were favorable to the formation and accumulation of TRs.

借助参数模型研究各参数因子对TFs和TRs形成的影响，结果表明：茶多酚浓度、温度、酯比例及pH值对TFs和TRs形成与积累均有显著影响，反应时间对TFs影响显著，氧化剂对TRs影响显著；单因素效应显示：较低的茶多酚和氧化剂浓度、适当的低温和较短的时间、低的酯比例和pH较有利于TFs形成与积累，而有利于TRs形成与积累的参数则相反。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。