硝化

Therefore, nitrification and denitrification has attracted more attention, whether from an agricultural point of view, or from an environmental point of view.

因此，无论是从农业的观点，还是从环境的角度看，硝化反硝化作用已引起人们越来越多的关注。

Biological powdered activated carbon enhanced the growth of nitrifier by absorbed toxic or inhibitory substance.

生物活性炭吸附了对硝化菌产生毒性和抑制的物质、强化了硝化菌在炭表面的生长。

Nitrations of both hydroxyl- and acetamino-substituted porphyrins were found to take place at the adjacent position of the substituent in the very aryl ring, whereas nitro group was guided into para positions of unsubstituted phenyl ring during the nitration of nitro-substituted porphyrin.

结果表明，羟基和乙酰氨基卟啉的硝化反应发生在与该取代基处于同一芳环的meta位，而硝基卟啉进行硝化时，硝基取代于其他未取代苯环的para位。

But, this kind of condition would only occurred when a great deal of nitrobacteria are added into the water.

1去氨硝化菌能将鱼类所排放的氨转成毒性较小的亚硝酸盐，而去亚硝酸硝化菌则负责将亚硝酸盐再转成毒性更小的硝酸盐，硝酸盐必须由换水的方式移除，像硝化细菌这类的细菌再作用时需要消耗水中的氧气所以也称好氧菌。

The results indicate that excellent nitration of NH,-N need the sufficient removal of COD to prevent the restrain of toxicant on the nitrobacteria.

指出NH_3-N完全硝化的前提是废水中COD的充分降解，以消除有毒物质对硝化菌的抑制作用。

Because of the slow growth rate, that increases the contaminant opportunity by other micro organisms, for these reason it risen the difficulty of culturing and purifying the nitrobacteria, and limit the counting method.

因自营菌生长速度缓慢，造成遭受其他微生物污染的机率上升，所以更增加了硝化菌在培养及分离上的困难，以及计数上的限制，使得现今环境中硝化菌的实际数量及其计数方式仍存有许多争议。

As one of the three executive committee members of WONIPA, SNC is the only Chinese nitrocellulose enterprise that surpasses international giants.

公司是世界硝化棉制造商协会三家执委单位之一，是唯一超越硝化棉国际巨头的中国本土企业。

Among them, the Xuefei company nitrocotton to be in the national civil nitrocotton production enterprise first, the Huasong Company plasticizer production and marketing occupies the nation third.

其中，雪飞公司硝化棉在全国民用硝化棉生产企业中名列第一，华松公司增塑剂产销居全国第三。

The yield and regioselectivity were investigated at various ratios of nitrate to salicylate with copper nitrate comparing with nitrous acid.

对比研究了在不同硝酸根和水杨酸甲酯配比条件下用硝酸铜和硝酸作硝化试剂时的硝化收率和区域选择性。

Nitrite oxidoreductase was responsible for the nitrification of nitrite-oxidizing bacteria, which was coded by norB gene and others.

硝化菌主要由两大生理群组成：氧化氨氮为亚硝酸盐氮的是亚硝酸菌；氧化亚硝酸盐氮为硝酸盐氮的是硝酸菌，硝酸菌中负责硝化作用的酶是亚硝酸氧化还原酶，这个酶由norB等基因编码，因而对这个酶和基因的研究将有助于氮污染的控制和防治。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。