查询词典 sodium nitrite

Nitrapyrin and sodium azide could effectively inhibit the nitrite accumulation in soil.

在土壤硝化过程中存在可观的亚硝酸盐累积现象。

"Some preservatives also improve the appearance of the product (e.g., sodium nitrate and nitrite in meat s)."

某些防腐剂还有美化食品外观的作用(在肉类上使用的硝酸盐或亚硝酸盐)。

"Some preservatives also improve the appearance of the product (e.g., sodium nitrate and nitrite in meats)."

某些防腐剂还有美化食品外观的作用(在肉类上使用的硝酸盐或亚硝酸盐)。

"Some preservative s also improve the appearance of the product (e.g., sodium nitrate and nitrite in meats)."

某些防腐剂还有美化食品外观的作用(在肉类上使用的硝酸盐或亚硝酸盐)。

Zirconium containing MCM-41 molecular sieves with high surface area, good crystallinity and Si / Zr ratio from 20 -∞ were synthesized in a near neutral condition by using a sodium silicate as silicon source and a zirconyl nitrite as zirconium source.

MCM - 41与传统分子筛比较，最突出的特点是具有 1～ 5nm直径的孔道和 1 0 0 0m2 ·g- 1 左右的比表面，如此宽孔道尺寸的固体材料对于大分子的吸附和催化具有潜在的应用前景[1 - 3] 。

The function of shelter ing nitrite from sulfamic acid is compared with that from sodium azidum.

结果表明：海洋监测规范中COD的测定方法不适合于NO－2较高的污染海水，比较了氨基磺酸与叠氮化钠对NO－2的掩蔽效果及测定方法。

This apparatus can be used to determine the formaldehyde, Sodium formaldehyde sulfoxylate , nitrite ,nitrate ,sulfur dioxide and pesticide residue in food rapidly and quantitatively by spectrophotometry..

仪器采用分光光度法，快速定量检测食品中甲醛、吊白块、亚硝酸盐、硝酸盐、二氧化硫和农药残留，适用于食品生产企业、农业生产基地、农业市场、质量监督、卫生防疫等部门。

This apparatus can be used to determine the formaldehyde , Sodium formaldehyde sulfoxylate , nitrite ,nitrate ,sulfur dioxide and pesticide residue in food rapidly and quantitatively with spectrophotometer..It is suitable for food production enterprises , agriculture markets ,quality monitoring ,epidemic prevention department ,etc.

项目简介：仪器采用分光光度法，快速定量检测食品中甲醛，吊白块，亚硝酸盐，硝酸盐，二氧化硫和农药残留，适用于各级工商部门，农检中心，农业植保，食品生产企业，农贸批发市场，质量监督，卫生防疫等部门。

Add 100-150g of finely crushed ice and stir until the m-nitroaniline has been converted into the sulphate and a homogeneous paste results. Cool to 0-5°C by immersion of the beaker in a freezing mixture, stir mechanically and add a cold solution of 18g(0.26mol) of sodium nitrite in 40 ml of water over a period of 10 minutes until a permanent colour is immediately given to potassium iodide-starch paper: do not allow the temperature to rise above 5-7°C during the diazotisation.

加入100-150g碎冰，搅拌至m-硝基苯胺成硫酸盐，把烧杯浸入到冷冻液中冷却到0-5°C，机械搅拌下于 10 min内加亚硝酸钠冷溶液（由18g(0.26mol)亚硝酸钠和40 ml 水组成），直到用淀粉-碘化钾试纸测试时，能使该试纸立即显色且不褪色：在重氮化反应时不允许温度超过5-7°C。

The ten target compounds from alkyl substituent to aryl substituent that have not yet been reported,which was obtained by dehydration, Subsequently treated with sodium nitrite resulting nitroso compounds and then reduced.

本论文以2-羟基-3-萘酸和邻巯基苯胺为原料，通过分子脱水、亚硝化、还原等反应合成了10个不同取代基团的4-苯并噻唑基-[1，2-d]萘并噁唑衍生物，并优化了合成的工艺条件。

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。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。