查询词典 phenol-phthalein

This Waste water containing tar, phenol, ammonia, cyanide, benzene, pyridine, quinoline and indole dozens of other pollutants, it is very complex and is high concentrations of pollutants, it is color, toxicity and stable, after biological treatment,there are still a large number of non-degradable organic pollutants, it is a typical example of intractable industrial wastewater.

焦化废水是煤在高温干馏过程中以及煤气净化、化学产品精制过程中形成的废水，其中含有焦油、酚、氨氮、氰、苯、吡啶、吲哚和喹啉等几十种污染物，其水量大，成分复杂，污染物浓度高、色度高、毒性大，性质稳定，经生化处理后，仍有大量难降解的有机污染物，是一种典型难处理的工业废水。

Locks SSGP 850 is a fully synthetic soluble grinding fluid, which does not contain mineral oil, sulphur, chlorine, phosphate or phenol. Locks SSGP 850 is highly recommended in the precision grinding operation of cast iron, carbon steel, steel alloy, stainless steel, aluminum and its alloys, copper and its alloys.

洛斯 SSGP 850是全合成型水基磨削液，不含礦物油和硫、氯、磷、酚等物質，特別推薦應用於鑄鐵、碳鋼、合金鋼、不銹鋼、鋁和鋁合金，鋼和銅合金及非金屬材料的精密磨削加工。

For anti-oxidant capability, it was found that the 140℃ superheated steam-heated sweet potato had the highest contents of total phenol and flavonoids, and the best scavenging ability of DPPH (1, 1-diphenyl-2-picrylhydrazyl) and FRAP (Ferric reducing ability of plasma).

在抗氧化力方面，发现不论总酚、类黄酮、清除DPPH (1， 1-diphenyl-2-picrylhydrazyl)或FRAP (Ferric reducing ability of plasma)值皆以140℃过热蒸汽加热30 min者最高。

The invention uses the industry byproduct in production of sulfonation-process phenol or the byproduct (Na2SO3 content is 60-85percent) in production of p-cresol and sodium hydrosulfite to produce the aliphatic high range water reducer and takes acetone, formaldehyde, industry byproduct, sulphite or sodium pyrosulfite as raw materials and then sulfonation and condensation reactions are carried out in aqueous medium, the reactant weight ratio is acetone: formaldehyde: sulphite plus industry byproduct: water is equal to 1:2.5-4.5:1.5-2.6:4.0-6.0, the mass concentration of the condensation compound obtained is 30-42 percent, and the viscosity thereof is 20-100m.

本发明利用磺化法苯酚生产中的工业副产品，或者对甲酚和保险粉生产过程中副产品(Na 2 SO 3 含量在60～85％)生产脂肪族高效减水剂，采用丙酮、甲醛、工业副产物、亚硫酸盐和或焦亚硫酸钠作为原材料，在水介质中进行磺化和缩合反应，反应物的质量比为丙酮∶甲醛∶亚硫酸盐副产品∶水＝1∶2.5～4.5∶1.5～2.6∶4.0～6.0，所得到的缩合物的质量浓度为30～42％，粘度为20～100m。

The experiment also indicates that the distribution of contents of total phenol was opposite: in white birch, lower parts were higher and in European White Birch, upper parts were higher.

在雪兔选食的过程中，虽然并不回避任何一个种源的桦树幼苗，但它们明显喜食来自中国的白桦，这一结果没有支持过去欧美学者提出的有关理论。

Phenol novolac resins and sulphanilamide were used to cure rigid rod epoxy resins, namely DGEBP, DGETMBP and traditional epoxy resin.

用线性酚醛树脂和4-氨基苯基氨基砜作为固化剂，与刚性棒状环氧树脂联苯环氧、四甲基联苯环氧和传统双酚A环氧树脂分别进行固化。

Eight dominant strains that can effectively degrade acidic material in landfill leachate were selected to investigate their degradation of benzoic acid, phenol, phthalic acid, fatty acids and so on in landfill leachate.

分离筛选能够快速降解垃圾渗滤液中难降解有机酸性物质的优势菌种8株，研究了这8菌株及其混合体对苯甲酸、苯酚、邻苯二甲酸、脂肪酸等以垃圾渗滤液中常见的有机酸性物质的降解特性。

Dihydroxydiphenylsulfone(2,4′-BPS)was prepared by reaction of phenol and H_2SO_4 in o-dichlorobenzene as solvent in the presence of phosphorous acid as catalyst.

以邻二氯苯为溶剂，苯酚、硫酸为原料，通过添加催化剂亚磷酸合成2，4′-二羟基二苯砜(2，4′-BPS)，确定了较好工艺条件：n苯酚∶n100%硫酸=2.2∶1，亚磷酸16g，回流时间8.0h，2，4′-BPS含量为47.42%，粗收率为70.0%，产品为白色的结晶。

A better method of decreasing free formaldehyde and free phenol during the synthesis of phenolic resol resin was investigated.

经分析，改性后的酚醛树脂中，游离酚和游离醛的含量进一步降低。

However, phenolic resin contains high contents of free phenol and free formaldehyde that cannot be removed substantially.

但是，在制备酚醛树脂的过程中，有大量的游离酚、游离醛不能反应完全，残留在树脂中，对环境和人体的危害极大。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。