二氧化氮

A new catalytic spectrophotometry was established for the determination of trace silver based on the catalytic effect of Ag on the oxidational discoloration reaction of methyl violet with potassium persulfate in buffer medium of HAc-NaAc including phenothroline as activator.

在醋酸－醋酸钠缓冲介质中，有活化剂邻二氮菲存在时，Ag对过硫酸钾氧化甲基紫褪色反应有催化作用，建立了测定痕量银的新催化光度法。

Starting from 4-androstenedione, three novel 3-oxo-4-aza-5-androstene-17-oxime derivatives 7, 8 and 9 were synthesized through oxidation ring cleavage, amination ring closure, oximation,and substitution .

以4雄烯二酮为起始原料，经过氧化开环、氨解闭环、肟化、取代等4-步反应，合成了3个新的3-羰基-4-氮杂-5-雄甾烯-17肟衍生物7、8和9，并用质谱、1HNMR、13CNMR等测试手段对目标化合物的结构进行了表征

The hydroxyl free radical scavenging rate was determined by phenanthroline spectrophotometry, and the antilipoperoxidant was determined by colorimetry.

采用邻二氮菲分光光度法测定经自由基的清除率，比色法测定其对脂质过氧化的抑制作用。

The scavenging effects of different solvent extracts on hydroxyl radicals produced by the system were compared by phenanthroline oxidation method, and change conditions of scavenging rate of hydroxyl radicals with the prolonging of time were studied.

方法］采用超声波提取法，分别以蒸馏水、50%乙醇和95%乙醇为溶剂，在40℃条件下提取30 min，获得了薄荷的不同溶剂提取物，并以邻二氮菲氧化法比较了不同溶剂提取物时体系产生的羟基自由基的清除作用，并研究随时间延长羟基自由基清除速率的变化情况。

The comples formed with phen,dipy and variant valence metal such as Fe,Co,Ru and so on was statable and had higher electric potential at low valence.There was difference between the colours of low and high valence methal complex,so it played very important rule in oxidate-reduction titration and spectrophotometry.

邻二氮菲、联吡啶与铁、钴、钌等变价元素形成配合物，低价态呈稳定态，电对电位升高，且高低价态配合物颜色有明显差异，使之在光度分析，氧化还原滴定中获得重要应用。

A high molecular weight polyisobutenyl succinimide dispersant with high nitrogen content and good thermal and oxidative stabilities was developed.

采用氯化烃化工艺和后偶联反应技术开发了一种氮含量高、热稳定性和氧化稳定性好的高相对分子质量的聚异丁烯基丁二酰亚胺分散剂。

Results After 24,48,72 and 96 hours of gunshot wound,the plasma level of ALT was significantly increased than that of the unwounded;AST(at 2nd,8th,24th and 48th hour),CK(at 2nd,8th and 24th hour),TG(at 24th,48th,72nd and 96th),BUN(at 2nd,8th and 24th) and DAO(at 8th,24th and 48th) were increased greatly.

1.2 检测指标所有致伤犬均于低温前、低温后即刻和伤后2，8，24，48，72和96小时抽血测丙氨酸转氨酶、天冬氨酸转氨酶、肌酸激酶、甘油三酯、尿素氮、肌酐、内毒素和二胺氧化酶含量，并同时观察生命体征的变化。

EVA/LDPE/ CB conductive foam was made of EVA and LDPE as matrix,HG-1P CB and ACET CB as conductive filler,AC as foamer and DCP as crosslinker.

文章以乙烯-乙酸乙烯酯和低密度聚乙烯为主基体，特导炭黑(HG-1P)和乙炔炭黑为导电填料，偶氮二甲酰胺为发泡剂，过氧化二异丙苯为交联剂，制备了EVA/LDPE/炭黑导电泡沫复合材料。

The nitrous oxide emission of fluidized bed combustors is also analyzed and commented. A strategy for both NOx and N2O control is proposed.

另外，还对氧化二氮排放进行了分析评述，提出了同时控制NOx和N〓O的策略。

These include such medications as colchicine, bisphosphonates and hormones; dietary therapeutics, such as ginger extract and green tea; and such truly experimental treatments as matrix metalloproteinase inhibitors, cytokines, nitric oxide, growth factors and gene therapy.

这些疗法包括药物治疗如秋水仙素，二磷酸盐和激素；饮食治疗，如姜汁和绿茶；还有试验性治疗象基质金属酶蛋白抑制剂，细胞因子，氧化亚氮，生长因子和基因治疗。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷