查询词典 optimum condition

Extraction of edible red pigmengt from solanum nigrum fruit by optimum seeked process conditions, determined single factor condition, designed orthogonal layout, and measured absorbance at 527nm wavelength, weighed up the pigment extracting effect and stability. The most favoured extracte conditions were determined as follows: The extracting regent was citric acid hydrotropic solution, pH was 1.72, the quantities of added sample to the solution was 3.35g/100mL, the temperature was 60℃, the extracting time w...

以成熟的龙葵果为原料提取食用红色素，通过优化工艺、确定单因素条件、设计正交试验，以527nm波长的吸光度值衡量色素提取效果和稳定性；最优化的提取条件为：柠檬酸水溶液提取剂pH为1.72，样品加量3.35g/100mL，提取温度60℃，浸提时间60min；龙葵红色素提取液长期接触光、空气和Fe3+，稳定性下降，因此，在提取、干燥和储存时要尽量避免长时间接触光和空气、避免与铁制容器直接接触。

The conversion of isobutyraldehyde and the selectivity to 2,4,6-triisopropyl-1,3,5-trioxane were 91.1% and 99.8% respectively under optimum reaction condition isobutyraldehyde 25.0 g, [Et3NH]Cl/FeCl3 ( x (FeCl3)＝0.62 1.0 g, 25 ℃ for 1 h .

在最佳的反应条件下（异丁醛25.0 g， [Et3NH]Cl/FeCl3 x (FeCl3=0.62 1.0 g， 25 °C，N2保护下反应1 h，异丁醛的转化率为91.1%，对2，4，6-三异丙基-1，3，5-三氧噁烷的选择性达99.8%。

The effects of feeding frequencies(1, 2, 3 and 4 times per day) on the growth of Sparus macrocephalus were studied in a 40 d growth trial under the condition of 26.8~24.5℃, 26.0~27.0 salinities for determining the optimum feeding frequency. Identical diet was selected for the mature and seedling of Sparus macrocephalus in the aquiculture system.

选取同一种饵料设置4个饲喂频率水平（分别为1次／d、2次／d、4次／d、6次／d），采用静水连续充气养殖系统，在盐度为26.0~27.0、温度为26.8~24.5℃的条件下对黑鲷成鱼和鱼种进行为期40d的生长实验。

As the primary factor, alkabinity should condition were acquired. As the primary factor, alkabinity should be below 12g/L; the desulfurization effect is optimum when the ratio of tannic and sodiumm metavanadate was 1.5-2; the high absorption temperature is unfavour for desulfurzation 30~40癈 was proved to be effective through experiments.

并得出碱度是影响其脱硫效率的主要因素，总碱度控制在129几以下比较适宜；拷胶和钒在脱硫过程中只是起催化作用，且得到二者比例满足1.5一2时，脱硫效果最佳；温度对脱硫效率的影响主要是在较高温度下会促进副产物 NaZSZO3的生成，所以脱硫反应器中的温度不能太高，经实验证明一般控制在30一40℃。

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。

The optimum conditions of reaction of each reaction:(1) The synthesis condition of PS with monocarboxylic acid terminated is that the mole ratio reatant of FeCl2·4H2O/chloroactic acid was 2.0, the reaction temperature 110℃, the reaction time

各步的最佳聚合反应条件：(1)mPEG与丁二酸酐反应最佳条件：溶剂为甲苯

Express as a result that the study area gets close to hydrocarbon generation center, have high-quality coal measures hydrocarbon source rock along with big hydrocarbon generation intensity, so it has abundant gas source and the material foundation to form large scale natural gas reservoir; Evaporitic tidal flat facies of the Ordovician Majiagou Formation in this area is situated in the austral expanded range of the karstification zone, and is the optimum natural gas prospecting targets of the lower-Paleozoic; In the south of study area, there are well-developed delta deposition system sand bodies of Shanxi Formation and Xiashijezi Formation, hence this area becoming the most beneficial Neopaleozoic natural gas enriched region; In this area, the Paleozoic develop various concealed non-structured traps, the natural gas migration and accumulation process is very beneficial and both the cover and the conservancy condition are also very good.

结果表明：研究区紧邻上古生界生烃中心，发育优质煤系烃源岩，生烃潜力大，气源充足，具备形成大型天然气藏的物质基础；区内奥陶系马家沟组发育有蒸发潮坪相沉积，位于北部古潜台的向南延伸带上，是下古生界天然气的有利勘探目标；南部山西组和下石盒子组发育三角洲沉积体系砂体，是有利的上古生界天然气富集区；研究区古生界发育各种隐蔽性非构造型圈闭，天然气运聚成藏过程非常有利，封盖和保存条件也很好。

Result Under common condition of water body, the growth of S. obliquus accelerated along with the increment of P concentration in water body with optimum P concentration being about 2 mg/L. Both low and higher P concentration would play certain limiting function on the growth of S. obliquus.

结果］在通常水体情况下，斜生栅藻的生长随着水体磷浓度的升高而加快，斜生栅藻生长的最适磷浓度为2mg/L左右，低浓度和较高的磷浓度都会对斜生栅藻的生长起一定的限制作用。

The experiment results showed that the optimum reaction condition were as follow: concentration of H_(2)SO_(4) was 0.5 mol/L, calcinations time were 4 h at the temperature 550℃, the molar ratio of acrylic acid to octadecyl alcohol was ...

丙烯酸十八酯的优化工艺条件为：丙烯酸与十八醇的摩尔比为1.2，固体超强酸及对苯二酚的用量分别为6%、0.8%，反应温度为120℃，反应时间为3 h。在此反应条件下，酯化收率可达97%。

The production was further verified with IR.The experiment results showed that the optimum reaction condition were as follow:the molar ratio of acrylic acid to octadecyl alcohol was 1.2∶1,the amounts...

由实验得出的最佳合成条件是：丙烯酸与十八醇的摩尔比为1.2∶1，固体超强酸及对苯二酚的质量分数分别为6%，0.8%，反应温度为120℃，反应时间为3 h，在此反应条件下，酯的产率可达97%。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。