查询词典 acid-carbonate

The results indicated that the total quantity of volatile components in grape wine after MLF had increased and there were evident difference in the contents and proportion of isoamyl alcohol, 2-ethyl hydracrylic acid, ethyl succinate, and acetic acid in the two kinds of grape wine treated or not treated by MLF. Besides, lactic acid and ethyl lactate, which could not be accurately identified in grape wine not treated by MLF, could be easily separated and identified in grape wine treated by MLF like other main components.

结果表明，MLF葡萄酒较未经MLF的葡萄酒中挥发性成分的总量有所提高；异戊醇、2-羟基丙酸乙酯、琥珀酸乙酯和醋酸在两工艺的葡萄酒中的含量和比例存在明显差异；乳酸、乳酸乙酯和两种未能准确鉴定的物质只在MLF葡萄酒中作为主要成分被分离检测到。

Amino-6-nitrobenzodifuroxan was prepared through a three-step reaction from starting material 3, 5-dinitrobenzoic acid:(1)3, 5-dinitroaniline (1) was synthesized from the reaction of DNBA and hydrazoic acid in inert solvent 1, 2-dichioroethane through Schmidt rearrangement with yield of 89.6%;(2) 1 was subjected to nitration to prepare pentanitroaniline (2) with yield of 51.1%;(3) The title compound was prepared from 2 and sodium azide in acetic acid through denitrogenation and then Schmidt rearrangement with yield of 86.8%, m.p.204℃～206℃.

以3，5-二硝基苯甲酸为原料经过3步反应合成了7-氨基6-硝基苯并二氧化吠咱：第1步反应，在二氯乙烷惰性溶剂中，DNBA与叠氮酸反应并发生Schmidt重排反应生成3，5-二硝基苯胺(1)，产率89.6%；第2步反应，1在含100%硫酸的硝硫混酸中硝化生成五硝基苯胺(2)，产率51.1%；第3步反应，2与叠氮酸反应，不经分离直接进行热解脱氮、Schmidt重排反应，得到目标化合物， m.p.204℃~ 206℃，产率86.8%。

Bromoundecanoic acid was synthesized with 10-undecanoic acid and hydrobromic acid as raw materials.

以10-十一烯酸和溴化氢为原料合成11-溴代十一酸，考察了引发剂、溶剂、反应温度、后处理方法、熟化时间等因素对反应和产品的影响。

Bromoundecanoic acid was synthesized with 10-undecanoic acid and hydrobromic acid as raw materials. The effects of initiating agent, solvent, reaction temperature, the ways of disposal, ripening time etc. on the reaction and product were investigated.

以10-十一烯酸和溴化氢为原料合成11-溴代十一酸，考察了引发剂、溶剂、反应温度、后处理方法、熟化时间等因素对反应和产品的影响。

Keywords Black mercury sulfide;Thickish hot hydrochloric acid;Hydrobromic acid;Hydroiodic acid;Dissolve

黑色流化汞；热浓盐酸；氢溴酸；氢碘酸；溶解

The effects of three collectors,benzyl arsionic acid,diphosphonic acid and C_(79) alkyl hydroximic acid,on ilmenorutile,fersmit and niobite floatation with the various pH and collector dosage are investigated.

研究三种捕收剂在不同pH和用量的条件下对纯铌铁金红石、铌钙矿和铌铁矿的捕收影响。

The amount of hydroxyacetic acid , equal to that of sodium chloride, produced from chloroacetice acid hydrolysis is determined by adopting Moore method and there fore the ratio of transformation of chloroacetice acid hydrolyzed can be calculated.

氯乙酸水解生产羟基乙酸的工艺过程中产生等物质量的氯化钠，采用莫尔法测定氯乙酸水解的产物氯化钠，并计算氯乙酸的水解转化率，从而选择和控制水解反应的条件。

Glycolic acid (Hydroxyacetic acid, 2-hydroxyethanoic acid) is a chemical industry material. It is applied in a lot of fields including organic synthesis, cleanout, plating, spinning, leather and sterilization, etc.

羟基乙酸又称乙醇酸、甘醇酸，是一种重要的有机合成中间体和化工产品，广泛应用于有机合成、清洗、电镀、纺织、皮革、灭菌等行业。

Caustic soda,hydrochloric acid,liquid chlorine,PVC resin,sulfuric acid,chlorosulfonic acid,calcium carbon,sulfanilamide,sulfadimidime,dissolved acetylene,oxygen and hypochloric sodium.

烧碱，盐酸，液氯，聚氯乙烯，硫酸，氯磺酸，电石，磺胺，磺胺脒，溶解乙炔，氧气，次氯酸钠。

Secondly, organical composite thermal storage materials which takethe PNIPAAm gels as the carriers and the palmitic acid and the lauric acidmixture for phase change materials were Synthesized by radicalpolymerization ,and organical/inorganical composite materials which takeP(NIPAAm-co-AAm) gels as the carriers and the palmitic acid、thelauric acid and Na_2HPO_4·12H_2O mixture were also Synthesized byradical polymerization.

其次，本文采用自由基聚合法，合成了以PNIPAAm凝胶为载体，棕榈酸和月桂酸的混合物为相变材料有机复合相变蓄热材料；及P(NIPAAm-co-AAm)凝胶为载体，棕榈酸、月桂酸和Na_2HPO_4·12H_2O为相变材料的有机／无机复合相变蓄热材料，采用红外光谱、示差扫描量热法、热重分析、扫描电镜等手段对两种复合材料的结构及热性能进行了表征与分析，研究了有机酸和无机盐的百分含量对复合材料的相变温度和相变焓的影响。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。