查询词典 acid value

In this thesis, the advantages and disadvantages of potentiodynamic polarization curve, electrochemical impedance spectroscope and coulostatic method for studying corrosion inhibitors in acidic mediums were compared. And then the effect of three popular acid corrosion inhibitors such as thiourea, dodecylamine and propargyl alcohol on the corrosion inhibition behaviors of Q235 steel in acidic solutions were investigated by these techniques. The anodic desorption behavior and extreme value phenomenon of concentration were surveyed thoroughly as well.

本文讨论了动电位极化曲线、电化学阻抗谱和恒电量测量方法在酸性介质缓蚀剂研究中的优势和不足，在此基础上，研究了硫脲、十二胺和丙炔醇等三种常见酸性介质缓蚀剂对Q235钢在酸性溶液中的缓蚀行为和机理，并深入探讨了缓蚀剂的阳极脱附和浓度极值现象。

The minimum limit of detection was 3 ng. The average recovery and RSD value of protocatechuic acid were 99.7% and 0.27%, respectively.

结论该方法简便快速，结果准确可靠，可为半枝莲药材的质量评价提供有效手段。

Resultsph value and the contents of danshensu,protocatechuic aldehyde and salvianolic acid b had no significant change in compatible solution.

结果丹红注射液与10%氯化钾配伍后24 h内ph值无显著变化，丹红注射液中有效成分丹参素、原儿茶醛和丹酚酸b的含量6 h内基本稳定。

To broaden desert shrub new utilizing fields, accelerate desert shrub developing to the direction of high added-value and high benefit, the paper studied on the liquefaction of Salix, Caragana and Poplar in the presence of Phenol under sulfuric acid catalysis. The optimum processing parameters for Salix, Caragana and Poplar liquefaction and resinification were investigated. The effect of molar ratio of formaldehyde to liquefied products and NaOH to liquefied products on the character and glue strength of liquefied products resin was studied.

摘 要：为了开辟沙生灌木资源新的应用领域，促使沙生灌木资源的利用向高附加值、高效益的方向发展，本文以苯酚作液化剂，以稀硫酸作催化剂对沙柳、柠条和杨木进行液化实验，分析了反应温度、液比、催化剂用量及液化时间对液化反应的影响；并研究了沙柳、柠条和杨木液化产物树脂化合成工艺和配方，分析了不同的甲醛与液化产物摩尔比以及氢氧化钠与液化产物摩尔比对沙柳、柠条和杨木液化产物树脂的各项性能的影响。

Castor oil is an important industrial raw material, and the ricinoleic acid it contains has the characters of high viscocity, large proportion, higher burning point, lower freezing point, etc, with wider industrial utilities and higher economic value, castor oil has been listed as one of six strategic materials by US.

蓖麻油是重要的工业原料，其含有的蓖麻酸，具有粘度大、比重大、燃点高、凝固点低等性质，具有广泛的工业用途和极高的经济价值，美国已把蓖麻油列为六大战略物资之一。

In normal people and the patients with gastric ulcer dis- ease, gastric acid secretion can reach the maximum value in the night and so result in more seriosity of gastric ulcer.

在临床药理学中，认为药物服用后，其药动学参数不受一天内时间的影响，这是一个普遍的观点。

Objective:To determine the levels of sialic acid and serum Ca in patients with lung cancer, and study the clinic value for assistant diagnosis .

目的评价人血清样品中唾液酸以及微量元素Ca的含量对肺癌辅助诊断的临床价值。

Objective To investigate the value of serum CA125 and sialic acid assays in diagnosis of ovarian endometriosis and ovarian benign tumors.

目的探讨血清CA125和唾液酸对卵巢子宫内膜异位症及卵巢良性肿瘤的诊断价值。

The open reading frame of cDNA is of 603 bp, which encodes GH precursor consisted of 200 amino acid residues. Sequence alignment indicates that the average value of sequence homology approaches to 92.4% among 7 species of siluriforms catfish, the highest is 95.8% between Silurus, meridicnalis and S. asotus, lowest is 89.4% between C. lazera and S. asotus.

克隆的革胡子鲶GH cDNA开放阅读框全长603bp，编码由200个氨基酸残基组成的生长激素前体。5个科7种鲶形目鱼类GH基因序列同源比较结果表明，7种鲶形目鱼类间GH基因序列的同源性很高，平均为92.4%，大口鲶和鲶之间的同源性最高，为98.5%，革胡子鲶和鲶之间的同源性最低，为89.4%。

Soluble immobilized papain can fully solubilize above the pH 5.5.The optimum pH range of papain was narrow,and its optimum temperature and Km value were all higher than before.Its thermodynamtic stability and the acid-base stability were also strengthened.

可溶性固定化木瓜蛋白酶能够在pH5.5以上的溶液中完全溶解，最适作用pH值范围变窄，最适作用温度和Km值升高；热稳定性和酸碱稳定性均明显增强。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。