查询词典 methenamine

Phosphate porous starch and PVA were cross linked by methenamine and boric acid Crystal area was serious destroyed by esterification and cross linked. 6 Biodegradation experiment was carried out with soil-burying method.

5红外光谱和X-射线衍射的结构分析表明：在改性淀粉的羟基上引入了磷酰基团，并未破坏原淀粉的基本化学结构；交联剂在改性淀粉和PVA之间形成了C-O-C化学交联键；酯化和交联反应均有较强的淀粉晶区破坏作用。

By using water bath method that an aqueous solution of zinc nitrate（Zn（NO3）2·6H2O）reacted with an aqueous solution of equimolar methenamine（C6H12N4）,ZnO nanomaterials with controllable morphologies are successfully prepared. The influences of solution concentration and substrates on morphology of ZnO nanomaterials are discussed.

用硝酸锌（Zn（NO3）2·6H2O）与六亚甲基四胺（C6H12N4）以等浓度配制成反应溶液，通过水浴法制备出了形貌可控的棒状ZnO纳米结构，讨论了不同反应浓度及衬底对ZnO表面形貌的影响。

Methods: Twenty-four Kkay mice were divided into three groups(n=8):diabetes group,methionine-diet group,folic acid and vitamin B12 treatment group. C57Bl/6 mice were used as controls(C57). Four months later,the mice were sacrificed and their serum levels of Hcy,folic acid and vitamin B12 were measured by fluorescence polarization immunoassay. Pathological changes in kidneys were examined with the periodic acid schiff method with periodic acid-silver methenamine staining under electron microscope. Expression of MMP-9 protein or mRNA was detected by RT-PCR with immunohistochemical staining. Results: Different morphological changes of DN were found in Kkay mice.

Kkay糖尿病鼠随机分3组：糖尿病组、高蛋氨酸组和叶酸、维生素B12组，C57BL/6鼠为对照(C57)，以相应饲料喂养4个月后取材，测定血糖、血同型半胱氨酸、叶酸和维生素B12，以PAS、六氨银染色法光镜下及超微电镜观察各组DN病变，比较各组肾小球硬化指数；以免疫组化和半定量图像分析肾小球MMP-9蛋白表达，并以RT-PCR检测肾脏MMP-9 mRNA水平。

Pneumocystis carinii cysts were observed in the lung print smear after staining with gormori methenamine silver,and pathological changes in the lung section were observed after staining with hematoxylin-eosin.

3肺组织印片六亚甲基四胺银染色观察卡氏肺孢子虫(Pneumocystis carinii，Pc)包囊，肺组织切片苏木素-伊红(hematoxylin-eosin，HE)染色观察其病理变化。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。