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E. 3-allyloxyisothiazole and N-allylisothiazolone, were synthesized with 3-mercaptopropionate as the starting material through ammonolysis, cyclization and allylation reactions.

以3-巯基丙酸甲酯为原料,经氨解、关环、烯丙基化合成了2种含有不饱和侧链的异噻唑类化合物,分别为3-烯丙氧基异噻唑和N-烯丙基异噻唑啉酮。

A novel synthetic approach of 3,3'-azobis(6-amino-1,2,4,5-tetrazine) was firstly devised. Taking 3,6-bis(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine as a primary material, DAAT was synthesized by high pressure ammonolysis and potassium permanganate oxidation. Compared with the four-step reaction in the literature, this new approach was reduced to two steps with a yield of 58.1%. The intermediate and DAAT were characterized by elemental analysis, IR and NMR spectra.

自行设计了3,3'-偶氮双(6-氨基-1,2,4,5-四嗪)新合成路线、采用3,5-双(3,5-二甲基吡唑-1-基)-1,2,4,5-四嗪为原料,由文献报道的4步反应缩减为2步,经高压氨解、高锰酸钾氧化合成了DAAT,总收率大幅提高,达到58.1%,并采用元素分析、红外光谱、核磁共振光谱等进行了结构表征。

Relati/onships between the relative height and the mean velocity explain that the effect to slow the velocity down of Centipede grass is the best, that of Bermuda grass is the second, and that of Carpet grass is the worst whatever the bottom is yellow loam or red loam.

经实验结果推得理论解合理,由相对高度与流速之关系图可看出:在土壤为黄壤及土壤为红壤的状况下,减缓流速效果皆以假俭草为最佳、百慕达草次之,最差者为类地毯草。

All compounds are synthesized starting from the acylation reaction of gallic acid with L-glutamine to form the basic scaffold, followed by the cyclic reaction in acetic anhydride and the key intermediate cyclic anhydride (compound 4) was obtained. The intermediate compound is condensed with different amino acids or primary amines, and produces the target compounds.

本研究以L-谷氨酸为基本骨架,与甲醚化保护的没食子酸缩合后,经过酰化、环合反应得到关键中间体环状酸酐(化合物4),再经胺解反应合成目标化合物,其化学结构经过红外光谱、电喷雾质谱和核磁共振谱(氢谱、碳谱、碳氢异核多键相关谱)确证。

A series of reactions may occur when the nitrous acid and naphthalene inside the atmospheric aqueous phases is exposed to sunlight. This article devotes to investigating from a microscopic angle the reaction mechanism and kinetics of this system using laser flash photolysis technique with an excitation wavelength of 355nm. The main research results are listed as below:(1) The OH quantum yield FOH for the photolysis of HNO2 in the aqueous phase was determined to be 0.234 and the absorption spectrum of OH radical was recorded as well.

本文以激光闪光光解为主要研究手段,考察了大气液滴中的HNO2及HNO2+萘体系经355nm紫外光照射后发生的微观反应及其机理,结果表明:(1)液滴中的HNO2经355nm光照产生OH自由基的量子产额为FOH=0.234;以瞬态技术记录了水相中的OH自由基的吸收光谱。

It is implemented using the sliding window least square method to associate radar measure data and photoelectric theodolites intersection data,calculating the simultaneous position of a target in space,getting position estimation by compensation of time,and coordinating transformation.

利用滑窗式最小二乘法将光电经纬仪实时交汇数据和雷达的实测数据进行互联,解算出目标的瞬时位置,经时延补偿后获得目标的位置估计,经坐标转换后实现光电经纬仪的实时引导。

The present invention features that one kind of aerobiota is first used to ferment glucose, saccharified starch liquid, enzymolyzed cellulose liquid and other carbohydrate to produce glycerin, and one other kind of anerobic microbe is then used to convert glycerin into propylene glycol.

本发明的特征在于首先使用一种好氧微生物菌种发酵如葡萄糖、淀粉糖化液、纤维素酶解液等碳水化合物产生甘油,进而再通过另一种厌氧微生物菌种将甘油转化为1,3-丙二醇,其中第一步发酵所得到的发酵液可离心或过滤除去菌体,清液可直接进入第二步发酵或者经浓缩后作为第二步发酵的批式流加液,部分菌体可在连续发酵时循环使用;第一步发酵液也可不离心经灭菌后再进行第二步发酵。

We used GIS got sum planting area, used GVG got crop planting index.

在本次研究中,我们利用3S技术,选择合适的TM遥感数字图像,建立了目视解译标志,在高性能计算机平台上经人机交互解译,应用GIS软件提取耕地总面积,由GVG软件获得作物种植面积指数,应用耕地总面积种植指数完成各个不同作物的种植面积的提取,取得了满意的结果。

Beef powder is produced from high quality Dabie mountain scalper and beef bone extraction through steps of ''biological enzymolysis, mailard reaction with reducing sugar and kinds of amino acid, low temperature spray dried after taste change and flavor adjust''. It mostly keeps beef's fragrance,flavor and nutrients.

牛肉精粉是以优质的大别山黄牛肉和牛骨抽提物为原料,经生物酶解后与还原糖和各种氨基酸发生美拉德反应生香,再经口感调理和适度调香后,采用国内最先进的低温真空干燥设备,干燥而成,极大的保留了牛肉的香气,香味和营养物质。

Beef powder is produced from high quality Dabie mountain scalper and ox bone extraction,the material make fragrance by mailard reaction with reducing sugar and kinds of amino acid after biological enzymolysis, and through low temperature spray drying after taste improving and flavor change. It mostly keep the fragrance,flavor,nutrients of beef.

牛肉精粉是以优质的大别山黄牛肉和牛骨抽提物为原料,经生物酶解后与还原糖和各种氨基酸发生美拉德反应生香,再经口感调理和适度调香后,采用国内最先进的低温真空干燥设备,干燥而成,极大的保留了牛肉的香气,香味和营养物质。

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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。

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