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- Keywords Pyridine azo)\|2\|naphthol;Atomic absorption;Tobacco;Copper;Spectrophotometry; 吡啶偶氮)-2-萘酚;原子吸收法;烟草;铜;分光光度法;
- Some new polymeric colorants,polyfluro alkyl esters of polymeric phosphonitrilic acid with azo dyes in the side chain,were prepared in the presence of pyridine. 首次将偶氮染料和聚合膦腈酸多氟烷基取代酯相结合,合成了一类具有阻燃、疏水憎油等特性的功能聚合物。
- Butadiene vinyl pyridine rubber latex. 丁二烯、乙烯基吡啶经乳液共聚制得的胶乳。
- Pyridine is a colorless chemical liquid. 吡啶是一种无色的化学液体。
- Nylon fastening tapes with AZO free are available for108 colours. 尼龙粘扣带不含偶氮染料,常备108种颜色的现货。
- Removal of azo dye Acid Red B(ARB) by magnetic ferrite adsorbents. 用铁酸盐型磁性吸附剂去除偶氮染料酸性红B
- Nylon fastening tapes with AZO free are available for 108 colours. 尼龙粘扣带不含偶氮染料,常备108种颜色的现货。
- Anneal is in favor of the crystallization of AZO films. 退火有利于薄膜结晶;
- Azo test follow EU directives requirement is 30ppm max. 偶氮测试依据欧盟正式要求是最大值为百万分之30.
- On the second part of the azo different nitrile synthesis of formamide. 第二部分研究了偶氮异丁腈甲酰胺的合成工艺。
- A method for the determination of 6 - bromo - 2 - naphthol and 2 - naphthol is described. 采用高效液相色谱法同时测定了6-嗅-2-萘酚和2-萘酚的含量。
- A fast and convenient analytical technique was suggested to detect naphthol isomers directly and simultaneously. 建立了一种同时检测萘酚同分异构体.;方法。
- Several prpduction methods, market demand and development of 2 - naphthol are introduced in this paper. 本文着重介绍了2-萘酚的各种生产工艺及市场需求。
- The method is based on the catalytic effect of nitrite ion on the oxidation reaction of naphthol green B in a dilute medium. 本文基于磷酸介质中亚硝酸根催化溴酸钾氧化萘酚绿B的褪色反应,建立了测定亚硝酸根的新方法。
- The fixation of CO2 carried out by these autotrophs, in addition to ATP, requires reduced pyridine nucleotide. 除ATP外,由这些自养生物进行的CO2固定,需要还原的吡啶核苷酸。
- The experimental results showed that naphthol is easily oxidized in SCW and its main aromatic residues are o-phthalic acid and benzoic acid. 实验表明:萘酚在实验条件下极易氧化分解,其主要芳环残留物为邻苯二甲酸和苯甲酸;
- The pyridine was chemisorbed at both Lewis and Bronsted sites on the glass surface. 在玻璃表面上,吡定都是化学地吸收在路易斯和布朗斯特德位置上的。
- The concentration of naphthol,mass flow(or residence time),and excess oxygen rate were the main factors which affect the decomposition of naphthol. 反应温度、萘酚溶液的浓度及质量流量是影响萘酚氧化分解的主要因素;
- Heterocylic aromatics such as pyridine and pyrimidines also give a somewhat similar set of bands in the 1600 cm region. 杂环芳香族结构类如吡啶、嘧啶类化合物在1600厘米-1(6.;25微米)区域也有相似的一组谱带。
- The experimental results showed that naphthol is easily oxidized in SCW and its main aromatic residues are o phthalic acid and benzoic acid. 实验表明:萘酚在实验条件下极易氧化分解,其主要芳环残留物为邻苯二甲酸和苯甲酸;