It's from sulfides, like from silver coins.

The structure, properties, and applications of transition metal sulfides IF nano-materials , i.

系统的介绍无机类富勒烯金属硫化物纳米管、纳米洋葱及其 纳米 复合物的结构 、 性质和应用.

The sulfite is a wide used additive . It will hurt human's health to eat too much.

亚硫酸盐是一种用途广泛的食品添加剂,若摄入过多则对人体的健康产生损害.

The inhibition of pyrocatechol on sulfite oxidation was investigated by oxygen removal and air oxidation tests.

通过除氧试验和空气氧化试验,研究了焦儿茶酚对亚硫酸盐自动氧化的阻滞作用.

Therefore, it is feasible to substitute conventional alkaline deinking by near-neutral sulfite deinking in plant.

因此, 近中性亚硫酸钠脱墨代替常规的碱性脱墨在纸厂是可行的.

This paper also discusses the possible reaction mechanism by using sodium sulfite as reducing agent.

讨论了以亚硫酸氢钠为还原剂的可能的反应机理.

First steep corn powder in dilute sulfite liquor, then produce starch syrup by routine production procedure.

先用稀亚硫酸溶液浸泡玉米粉, 再用常规操作生产淀粉糖浆工艺.

Introduce the sodium sulfite-AQ using in AP rice straw pulp and effect to paper & pulp properties.

介绍了亚硫酸钠 - 蒽醌在烧碱法稻草浆中的应用试验情况以及对 纸浆 性能的影响.

However, for those allergic to sulfites, their presence can cause skin irritation and headaches as well.

尽管如此, 对于亚硫酸盐过瘾者,仍会产生肌肤过敏和头痛的症状.

Six sulfonamide pyridazinones and two pyridazinones derivatives were synthesized. Their structure and bioactivity were reported.

本文报道了磺酰胺类哒嗪酮衍生物的合成,结构分析及生物活性的研究.

Antibiotics ( penicillin ) or sulfonamides or both are prescribed in severe infections to prevent complications.

对严重感染者用抗菌素 ( 青霉素 ) 或磺胺类药剂,或两者合用,以预防并发症.

At last , it titrates with ferrous ammonium sulfate, using the sodium diphenylamine sulfonate as a catalyst.

以二苯胺磺酸钠为指示剂, 用硫酸亚铁铵标准溶液滴定.

Methyl Ester Sulfonate Products W . Brad Sheats , Brian W . MacArthur ( The Chemithon Corporation , USA )

甲酯磺酸盐产品 ( 英文 )

HPLC method for determination of sodium azulene sulfonate in Marzulene-S granules was established.

建立了反相离子对HPLC法测定 麦滋林颗粒中薁磺酸钠含量.

The results show that lignin sulfonate coagulation time of COP rapid hardening high strength cement.

将绝热量热计与微机联用,研究了木质素磺酸盐对COP快硬早强水泥水化速率的影响.

Overbased petroleum SUlfonate magnesium lubricating oil detergent has been prepared with petroleum ammonium sulfonate.

以石油磺酸铵为原料制备了高碱值的石油磺酸镁润滑油清净剂.

The development, theoretical foundation and main patent technology abroad of over-based sulfonate complex grease are introduced.

简要介绍了高碱性复合磺酸钙基润滑脂的发展, 基本理论和国外主要专利技术.

The influence of sulfonation degree and plasticizer to the ionic conduction of the systems was examined.

研究了磺化度和增塑剂对增塑体系的离子导电性的影响.

The lignosulfonate water reducing agent was prepared via oxidation and sulfonation of wheat straw alkali lignin.

以麦草碱木素为原料,采用氧化磺化法,制备了磺化碱木素减水剂.

Advances in applications and technology for sulfonation using sulfur trioxide in manufacturing dye intermediates are reviewed.

综述了三氧化硫磺化在染料中间体生产中的应用和技术进展.

The aromaticity of solvent oil in the sulfonation reaction was investigated.

考察了溶剂油磺化过程中芳烃含量的变化.