尿囊

Production technology of synthesis of allantoin are reviewed, including glyoxal oxidation, electrochemical synthesis, calcium glyoxylate synthesis, dichloroacetic acid synthesis, ace-tochloral method, and oxidative decarboxylation.

评述了乙二醛氧化法、化学法、醛酸钙法、素三氯乙醛合成法、酸二氯乙酸法和尿酸氧化脱羧法等合成尿囊素的各种工艺。

The RNA genome of virus used forRT-PCR can be isolated not only from the infected chicken embryonated fluids, but also directly from tissue homogenate of field samples. The detection results of 67 field samples were identical with that of the conventional diagnosis.

本方法只需一个RT-PCR反应，整个过程在8小时内完成，既可取感染鸡胚尿囊液检测， 2002年）丫H人《'WIf寸它义：也可从病料直接检测。

The molybdoneodymium heteropoly compound K_(11)[YPMo_(11O_(39)_2] was synthesized and used as catalyst in the synthesis of glyoxal by hydrogen peroxide and condensation of urea from allantoin .

尿囊素是一种被广泛应用于医药、农业和轻化工领域的重要的精细化工产品。

Is located in Yellow River Delta, located in West Liuqiao Guangrao County Economic Development Zone, the brink of East Green high-speed, convenient transportation and strategic location, covers an area of 350,000 square meters, is a professional Companies are now built with an annual output of 3,000 tons glyoxylic acid, Allantoin 300 tons, 5,000 tons of sodium methanol, ethanol production of 5,000 tons of sodium scale.

广饶县弘达精细化工有限责任公司座落于黄河三角洲，位于广饶县西刘桥经济开发区，濒临东青高速，交通便利，地理位置优越，占地面积达350000平方米，是一家专业化公司，现已建成年产乙醛酸3000吨、尿囊素300吨、甲醇钠5000吨、乙醇钠5000吨的生产规模。

Allantoin was synthesized from glyoxylic and urea as raw materials using organic acid such as formic acid,oxalic acid and organic sulfonic,and one or two of organic acids such as hydrchloric acid,sulfuric acid and acetic acid catalyst.

以乙醛酸和尿素为原料，有机酸(如甲酸、乙二酸、有机磺酸等)、无机酸(如盐酸、硫酸、磷酸、醋酸等中的一种或两种)作催化剂合成了尿囊素产品。

Carbamide reacting with H2SO4 forms aminosulfonic acid. Allantoin is prepared by oxidation of the aqueous solution of glyoxal into glyoxylic acid which is then used to synthesize allantoin.

氨基磺酸的合成是用尿素和发烟硫酸反应；尿囊素的合成是用硝酸氧化乙二醛溶液制得乙醛酸后，再加入氢氧化钙和氯化钙，使乙醛酸以钙盐形式析出，然后在盐酸介质中与尿素缩合而成。

Four field strains of infectious bronchitis viruswere isolated from chicken kidney, trachea and lung of the young layer flocks in some regions of Shaanxi province. Biological characterizations of the virus were investigated by virus pathogenicity to chicken embryo and healthy chickens, hemagglutination test, hemagglutination inhibition test, dwarfing embryonated chicken eggs, electron microscopy and reverse transcription polymerase chain reaction. It demonstrated that allantoic fluid of each passage virus could hemagglutinate chicken red blood cells by treatment with 1% trypsin. The standard positive serum to IBV could inhibited the hemagglutination. The isolates could make respiratory and kidney diseases in chickens.

采集陕西省宝鸡市、扶风县、兴平市和榆林市等地鸡场疑似传染性支气管炎发病鸡病料，通过9～11 日龄非免疫鸡胚进行了病毒的实验室分离和传代，并对分离毒株进行了病毒的血凝性、血凝抑制性、致病性、鸡胚矮小化、电镜特征等生物学特性鉴定，结果表明，4 株分离株经1%胰酶处理后的各代病毒尿囊液均可凝集鸡红细胞，标准阳性血清可特异性的抑制其凝集性，回归试验可复制出与自然发病相同的病例，病毒传代物有明显的致鸡胚矮小化作用，透射电镜下可见有近似球形、直径100 nm左右的冠状病毒粒子，将分离鉴定的4 株IBV 定名为BJ-04、FF-04、XP-03 和YL-04。

Active Ingredients: Kidney Bean, Allantoin, Aloe Vera Leaf Juice, Maltodextrin and Menthol.

活性成分：菜豆，尿囊素，芦荟叶汁，麦芽糊精和薄荷。

The optimum work concentration of the indirect ELISA for detecting and screening positive hybridoma cells was established by research again and again. Polystyrene microtitration plates were coated with the purified DHV antigen at the amount of 0.5μg/well.

对鸡胚和鸭胚增殖的尿囊液病毒用反复冻融、氯仿处理、0.22μm滤膜过滤、PEG反透析浓缩以及Sephadex G-200分子筛层析的方法进行纯化，并以此来包被酶标板以及进行BALB/c小鼠免疫，效果良好。

This study consists 3 partsPart I: the research on the mechanism of affecting the growth of CAM vesselsBecause neoformative vessels is most related with bFGF and VEGF, this study designed bFGF, VEGF and the primer of its receptor, by the experiment of the generation of CAM vessels, draw the materials from CAM tissues consist account of vessels, by the experiment of RT-PCR, reserve the influence of HSYA on the expression of bFGF, VEGF, VEGF-R(flt-1) in CAM tissues.

本实验分为三部分：第一部分，HSYA影响鸡胚尿囊膜血管生成的机理研究由于新生血管与bFGF、VEGF及其受体的关系最为密切，本实验设计了bFGF、VEGF及其受体的引物，利用CAM血管生成实验，直接从富含血管的CAM组织上取材，通过RT-PCR实验，观察HSYA对CAM组织中上述三个基因表达的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。