查询词典 acid ratio

Fibers with different degrees of carboxymethylation were prepared by controlling the ratio of the weight of fiber to chloroacetic acid.

通过控制氯乙酸和纤维的质量比得到不同反应程度的羧甲基纤维素纤维。

The effects of mole ratio of chloroacetic acid to ethyl alcohol, catalyst dose, water-carrying agent dose and reaction time on the yield of ester are tested.

研究了氯乙酸与乙醇的摩尔比、催化剂用量、环己烷的用量、反应时间诸因素对产品收率的影响。

The preparation method is characterized in that:(1) at minus 10 DEG C to 10 DEG C, a chloroauric acid solution with a certain concentration is added into a nano-Pt/C catalyst by ultrasonic or stirring mixture and the atomic ratio of Pt to Au is controlled between 18:1 and 5:1;(2) a small amount of monohydric alcohol or dihydric alcohol or trihydric alcohol of C1-C3 is added and is stirred at minus 10 DEG C to 10 DEG C for 10 min to 5h, so as to prepare the carbon-loading Pt-Au bimetallic nano electro-catalyst;(3) if necessary, the catalyst obtained by the step (2) is treated for 0.5 to 4h at high temperature ranging from 100 DEG C to 700 DEG C in the inert or reducing atmosphere, so as to adjust and control the grain size of the Pt-Au bimetallic nano electro-catalyst.

本发明涉及了一种高稳定性碳载Pt-Au双金属纳米电催化剂的制备方法，其特征在于：(1)在-10～10℃中，将一定浓度氯金酸溶液加入到纳米Pt/C催化剂中经超声或搅拌混合，控制Pt∶Au的原子比为18∶1-5∶1；(2)添加少量C 1 -C 3 的一元、二元或三元醇类，在-10～10℃下搅拌10min-5h，制备了碳载铂金双金属纳米电催化剂；(3)视需要，可将步骤(2)得到的催化剂在惰性气氛或还原气氛中经100～700℃高温处理0.5-4h，可调控Pt-Au/C双金属纳米催化剂的粒径。

Chlorotic spot whitening, regulating the "three high"-linolenic acid is an essential component of human cell membrane material, one can improve the ratio of fat cell membrane, increasing membrane permeability, and promote cell metabolism, they are partial pigmentation of the Scavenging is particularly evident; also because of its strong anti-oxidation, plaque will not relapse back.

褪斑美白，调节&三高&α-亚麻酸是人体细胞膜的基本组成物质之一，能够改善细胞膜上的脂肪比例，增加细胞膜的通透性，促进细胞代谢，故而对局部色素沉淀的清除作用尤为明显；又因其具有很强的抗氧化作用，斑退后不会复发。

Results: The optimum conditions were found to be as follows: the molar ratio of isoamyl alcohol to cinnamic acid was ...

对甲苯磺酸是合成肉桂酸异戊酯的良好催化剂，具有实际应用价值，该实验合成工艺简单，酯收率较高。

With the molar ratio of cobaltous nitrate, phenanthroline and Pyridine-3,4-dicarboxylic acid is 1∶2∶1,under the condition of pH=5,heating at 50-60℃ and stirring,the ternary complex of cobalt is synthesized in the methanol solution.

将硝酸钴、邻菲罗啉和3，4-二羧基吡啶按1∶2∶1物质的量比计量，在pH=5和50-60℃加热搅拌的条件下，在甲醇溶液中合成了钴的三元配合物，用元素分析、红外光谱、紫外光谱、热重分析和摩尔电导率对配合物进行表征，结果表明该配合物为1∶1型电解质，其组成为[CoⅢ2]NO3.H2O，其中Pydc=

Element of acerbity kinase of flesh of the protein in fluid of lactic acid of the heartbeat that the author treated a swimmer in detail, blood, make water, serum, haemoglobin, hematuria and hematic Gao ketone / the test time of the 7 monitoring index such as coriaceous mellow ratio, method, note and its are opposite control its.

作者具体地论述了游泳运动员的心率、血乳酸、尿液中蛋白质、血清肌酸激酶、血红蛋白、血尿素以及血睾酮/皮质醇比值等7项监控指标的测试时间、方法、注重事项及其对控制其运动负荷的意义。

After SBF solution cultivation for some days, the Ca/P coating was very easily deposited on the porous surface that was constituted of cystiform polygon made up with irregular nanometer circles like honeycomb. The energy spectrum showed that n/n atom ratio is about 1.61:1 which is very similar to that of HA and human bone. The active surface of the porous titanium after acid-alkali treatment and SBF solution condition which calcium-phosphorus ions was supersaturated induced the formation of Ca/P deposition layer.

SBF溶液培养后发现沉积层由蜂巢状多边形胞状物组成，这些胞状物是由网状纳米环无规则排列构成，能谱测定钙、磷元素原子比n／n约为1.61∶1，与HA和人骨中的钙磷原子比很接近；通过对沉积机理的分析，认为微孔钛的活性表面和SBF溶液过饱和离子浓度的环境造成了液相中钙磷盐的沉积。

The different molar ratio of hexane diacid to terephthalic acid with the same molar diamine is designed to give the composites with different viscosity, thermal performance and the barrier properties. The 3-10 times of enhanced barrier properties of these polyerster based nanocomposites with this above MXD6T to pure polyester resins are first reported.

在相同摩尔二胺的情况下，不同摩尔比例的己二酸和对苯二甲酸使复合材料具有不同的粘度、热性能和阻隔性能，含有NMXD6T改性剂的聚酯其阻隔性能相对于纯聚酯提高了3-10倍。

The sodium dithiobenzoic acid was oxidized with potassium ferricyanide to obtain di disulfide.The influences of raw materials mole ratio,stirring method and reaction time on the yield were studied with orthogonal test.

用铁氰化钾溶液氧化二硫代苯甲酸钠，得双二硫代苯甲酰，采用正交实验探讨了4，4'-偶氮双(4-氰基戊酸)与双二硫代苯甲酰反应的投料比、搅拌方式、反应时间对反应收率的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。