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The shell polyose is glucosamine is composed by the majority of D- glucosamine and few N- the acetyl - D-, gets up the linear chain polysaccharide by β-(1,4) sugar glucoside keying, its structure is similar to the cellulose.

壳聚糖是由大部分D-氨基葡萄糖和少量的N-乙酰-D-氨基葡萄糖组成,以β-(1,4)糖苷键连接起来的直链多糖,其结构类似于纤维素。

The shell polyose is glucosamine is composed by the majority of D- glucosamine and few N- the acetyl - D-, gets up the linear chain polysaccharide by β-(1,4) sugar glucoside keying, its structure is similar to the cellulose.

壳聚糖是由大部分D-氨基葡萄糖和少量的N-乙酰-D-氨基葡萄糖组成,以β-(1,4)糖苷键毗连起来的直链多糖,其结构类似于纤维素。

A novel fluorescent acrylamide monomer, N-(4-Benzooxazol-2-yl-phenyl)- acrylamide, was prepared from o-aminophenol, p-aminobenzoic acid and acryloyl chloride, with polyphosphoric acid as dehydrating agent and triethylamine as deacidification agent.

以邻氨基苯酚、对氨基苯甲酸和丙烯酰氯为原料,以多聚磷酸为脱水剂、三乙胺为脱酸剂,研制了一种新的荧光丙烯酰胺单体N-[4-(苯并噁唑-2-)苯基]丙烯酰胺。

Two novel pyrazolone derivatives 2-ethylamino-6H-5-(1-phenyl-3-methyl/phenyl-5-pyrazolone-4-ylene)-1,3,4-thiadiazine (PMCP-ETSC/DPCP-ETSC) containing NNS six-membered heterocycles were synthesized by the condensation reaction of 1-phenyl-3-methyl/phenyl-4-chloroacetyl-pyrazolone-5 with 4-ethyithiosemicarbazide. The title compounds were characterized by elemental analysis, IR, 1H NMR, 13C NMR and single-crystal X-ray diffraction.

利用1-苯基-3-甲基/苯基-4-氯乙酰基-吡唑啉酮-5与4-乙基氨基硫脲发生缩合反应,生成了2个新的双杂环化合物2-乙氨基-6H-5-(1-苯基-3-甲基/苯基-5-吡唑啉酮-4-基)-1,3,4-噻二嗪(PMCP-ETSC/DPCP-ETSC),并对其进行元素分析、红外光谱、核磁共振表征和晶体结构分析。

On the basis of these principles and requirements,in this paper,a new modifier has been synthesized from pyromellitic dianhydride and thiosemicarbazide by the nucleophilic addition of anhydride,the cyclization of acyl thiosemicarbazide in alkaline solution,and the N-hydroxymethylation of the triazole-thione.

本文根据这一思路,以均苯四甲酸二酐和氨基硫脲为起始原料,通过酸酐的亲核加成反应、酰氨基硫脲的碱性环化反应、三唑硫酮环的N-羟甲基化反应合成出了一种新的N-羟甲基三唑硫酮酸改性剂。

The results of batch experiments showed that the anaerobic biodegradation kinetics of 2-CNB and 4-CNB by granular sludge were follwed by first-order reaction. The nitro groups of 2-CNB and 4-CNB were more easily attacked by electron than chlorines and they were reductively biotransformed to amino groups under anaerobic conditions. The acclimated anaerobic granular sludge, which could dechlorinate 4-chloroanline to aniline, showed that it had the ability of para-dechlorinating. The anaerobic biodegradating on pathway of 2-CNB and 4-CNB were suggested as follows:AbstractIn ZVI(zero-valent iron, Fe0)-reduction system, the nitro groups of 2-CNB and 4-CNB were reductively transformed to amino groups.

2分批试验结果证明,颗粒污泥降解2-CNB和4-CNB遵循一级动力学,在厌氧条件下,CNB发生序列的硝基还原与脱氯作用,苯环上的硝基比氯原子更容易受到亲电子攻击,发生还原反应生成氨基;所获得的颗粒污泥具有对位脱氯活性,可使4-CA进一步脱氯形成苯胺。2-CNB和4-CNB厌氧降解的建议性途径为: ZVI(Zero-valentiron)对2-CNB和4-CNB的作用主要是将苯环上的硝基还原为氨基;在ZVI与污泥共还原转化体系中,ZVI对氯代硝基苯的硝基转化具有一定的促进作用,但因ZVI对中间产物的吸附特性,终产物形成速率趋慢。

The a-amino groups of amino acids react reversibly with aldehydes to form a variety of compounds, each of which is called a Schiff's base.

氨基的α氨基与醛反应是可逆的,可形成多种化合物,每一种都叫希夫碱。

Research on promoting elimination rate of 3-amino-2-oxazolidinone and semicarbazide in turbot Scophthatmus maximus which exposed to bromogeramine and Chinese herbs have been carried out.

采用投喂药饵的给药方式,研究了苯扎溴胺和芳草中药对加速大菱鲆体内呋喃唑酮和呋喃西林代谢物3-氨基-2-恶唑烷基酮(3-am ino-2-oxazolid inone, AOZ)和氨基脲(Sem icarbazide, SEM)消除的作用。

The method comprises: reacting semicarbazide and terephthalaldhydic acid under stirring, and monitoring the end point with silica gel thin layer chromatography to obtain terephthalaldhydic acid semicarbazone.

本发明以氨基脲为原料,在搅拌下与对醛基苯甲酸反应,用硅胶薄层层析法监测反应终点,合成氨基脲缩对醛基苯甲酸。

On the basis of previous work in our laboratory, several novel thiosemicarbazones and semicarbazone compounds containing pyrazolone-ring have been synthesized.

本文在实验室原有工作的基础上,合成了以吡唑啉酮环为变色主体的缩氨基脲、氨基硫脲类有机光致变色化合物,通过对固态光致变色性质和晶体结构的研究,深入分析了它们的变色机理,并总结了光致变色性质与之间结构的关系。

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