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Result: Immersion test with JJ18 broth showed that the active components were extracellular moiety of the broth and that 10% concentration solution could kill nearly 90% snail immersed after 72 h,the salified broth has favourable thermostabily and photostability and showed that JJ18 has stable passage and its active components concentrate in the extract of n-butanol.

结果:JJ18菌株发酵液的活性成分集中在胞外液,当胞外液浓度10%时,72h杀螺率接近90%,且发酵外液成盐后有良好的耐热性,强光照下7 d内活性物质基本不改变,菌株传代稳定,杀螺活性成分集中在正丁醇萃取部位。

The new technology of potassium sulphate by potassium chloride and ammonium sulphate with the existing condition of ethylene glycol is discussed, and it has simple technology, high yield of potassium oxide and superior quality of production compared with that of synthesized in distilled water.

并对乙二醇溶液条件下氯化钾和硫酸铵复分解制备硫酸钾工艺进行了探讨,和水盐体系相比,具有工艺过程简单,氧化钾收率高和产品质量好等优点。

It is made generally with mixed salt of triethanolamine and ammonium hydroxide, twelve-acid isopropyl alcohol amides, for malde-hyde, polyvinyl chloride, wool oil, spice, pigment and water as raw materials.

一般采用硫酸脂肪醇的乙三醇胺与氢氧化胺的混合盐、十二酸异丙醇酰胺、甲醛、聚氧乙烯、羊毛脂、香料、色料和水作为原料。

A rapid and simple method was developed for determination of aroma c omponents of apple wine by head space solide-phase microextraction coupled to capillary gas chromatography-mass spectrometry. Four paramete rs, including fiber coatings,extraction time,concentration of salt, and extraction temperature,were optimized. 2-Octanol was used as an inter nal standard for accuracy improvement.

以顶空固相微萃取法(Head Space Solid-Phase Micro-Extractions,HS-SPME)和气相色谱质谱(Gas Chromatgraphy-Mass Spectrometry,GC-MS)联用,2-辛醇为内标,研究了萃取头、萃取时间、加盐质量浓度、萃取温度对苹果酒中香气物质萃取的影响,优化了分析条件,建立了快速测定苹果酒中香气物质的方法。

The results showed that functional nanometer ITO powders of 30-50nm size with dispersion performance can be prepared. The condition is that indium salt concentration is 88mmol/L, SnO2/In2O3 =5.3wt%, reaction solution PH value is 8, The precursor are thermally reduced at 450 ℃ under hydrogen gas ,at the sametime adding 6at.% KC1 salt to indium tin salts. Thus, satisfactory and stable dispersion of ITO particles in aqueous solution is obtained only through simple mechanical force.

KCl、反应铟盐浓度88mmol/L,掺杂比SnO_2/In_2O_3≈5.3wt%,维持PH值为8的反应条件下制备前驱体,前驱粉体在450℃,氢气气氛煅烧的条件下可生成功能性的具有很好分散性能的ITO粉末,粒径大小为30—50nm,此制备得到的粉体通过简单的机械分散可直接稳定的分散于水、醇介质,若通过分散剂处理后的分散体系可以稳定存在两个月以上。

The emulsion quartz stone material protective agent's solute has certain active multi-compositions and so on of functionality siloxanes and fluorine silicon hydride, this kind groups with the active ingredient carry alcoholysis reaction the ion condition water on quartz stone material surface, thus causes the siloxanes and the fluorine siloxanes has chemistry keying connection with the quartz stone surface, from outside to inside of the quartz stone surface and stone inside pore surface forms a kind of complex network structure, this kind of network structure is extremely dense, it may filter polar and carbon dioxide, slows down the speed that water molecules go in and out the quartz stone pore, so the quartz stone will not be soaked by the water molecules, meanwhile to be a barrier to stop alkaline compounds and salt to infiltrate from an interface to another, also can have the very good physical enhancement effect.

乳液型石材防护剂的溶质是具有一定活性的多官能度的硅氧烷和氟硅烷等组成,这种带有活性成份的基团与石材表层离子态水进行醇解反应,从而使硅氧烷和氟硅氧烷与石材表面进行化学键连接,由外向内在石材表面和石材内部毛的表层形成一种结构复杂的网状结构,此种网状结构极其密实,它可将极性水分子和二氧化碳进行过滤,减缓水分子进出石材毛孔的速度,不会被水分子浸湿,同时还有阻隔石材不同界面的碱性化合物和盐份向另外一个界面渗透,同时还能起到很好的物理增强效果。

Next to HSH and maltitol syrup, polydextrose is a suitable crystallisation inhibitor. Because of the high hygroscopicity of these crystallisation inhibitors, the ratio of

接近高渗盐溶液和麦芽糖醇糖浆,聚葡萄糖是一种合适的抗结晶物质。

ABSTRACT: In the presence of sodium t-butoxide and DMSO,ethyl 2-oxocyclopentanecarboxylate was subjected to C-alkylation with 2-(4-bromomethylphenyl)propanoic acid with high regioselectivity to give 2-[4-(1-ethoxycarbonyl-2-oxo-1-cyclopentanylmethyl)phenyl]propanoic acid (4) which was followed by hydrolysis,decarboxylation and salt formation to afford loxoprofen sodium in about 72% overall yield.

在叔丁醇钠和二甲基亚砜的存在下,2-丙酸对2-乙氧羰基环戊酮进行C-烷基化,再经水解脱羧,成盐即得洛索洛芬钠,以2-丙酸计算,总收率为72%。

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