查询词典 lead oxide

Being combining with products distribution in styrene oxidation, we propose the styrene epoxidation carry out with Ti metallacyclo intermediates, And at the same time Ti-ZSM-5 have properties both catalytic epoxidation and acid-catalysis, namely the skeletal Ti can catalyze styrene epoxidation to styrene oxide and the skeletal Ti and Al can provide Lewis acid site to cause the rearrangement of styrene oxide to phenylacetaldehyde rapidly, the solvolysis to glycols and the cleavage of C=C double bond. Ti-ZSM-5 can also provide Bronsted acid site simultaneously, which is also catalytic center for the solvolysis to glycols.

同时结合Ti-ZSM-5催化选择性氧化苯乙烯反应的产物分布结果，提出苯乙烯环氧化反应可能是通过金属有机环机理进行；Ti-ZSM-5同时具有催化环氧化和酸催化两种功能，其骨架钛可催化苯乙烯环氧化生成环氧苯乙烷，而骨架钛和骨架铝等可提供Lewis酸位使环氧苯乙烷迅速发生重排生成苯乙醛从而使其成为反应的主要产物，同时还可发生加成以及碳碳键的裂解等副反应：Ti-ZSM-5也提供Bronsted酸位，它也是生成加成产物的活性中心。

The results show that the fractography is woody structure, there is a great deal ferric oxide in the hair seam, its matrix is composed by the ferrite, the pearlite and a little of sorbite and troostite, the grain size is 9～10 levels primarily, there are obvious zone structure and inclusions, which are silicate, sulfide and a little of oxide.

结果表明：弯裂带钢的断口呈木纹状，发纹处存在大量氧化铁，其基体主要由铁素体和珠光体组成，有少量索氏体及屈氏体，晶粒度以9～10级为主，有较为明显的带状组织，夹杂物为硅酸盐、硫化物及少量氧化物。

"It has valence 2 or 4 in compounds, including stannous chloride (used in tin galvanizing and manufacturing polymers and dyes), stannous oxide (used to make tin salt s for chemical reagents and plating), stannous fluoride (used as an anticavity ingredient in toothpastes), stannic chloride (a stabilizer for perfumes and a source of other tin salt s), and stannic oxide (a catalyst and a polishing powder for steel)."

在化合物中的原子价为2和4。化合物包括氯化亚锡(用于电镀锡以及制造聚合物和染料)、氧化亚锡(制备化学试剂和电镀用的锡盐)、氟化亚锡、氯化锡(香水的稳定剂以及其它锡盐的原料)以及氧化锡(催化剂以及钢材的拋光粉)。

"It has valence 2 or 4 in compounds, including stannous chloride (used in tin galvanizing and manufacturing polymers and dyes), stannous oxide (used to make tin salts for chemical reagents and plating), stannous fluoride (used as an anticavity ingredient in toothpastes), stannic chloride (a stabilizer for perfumes and a source of other tin salts), and stannic oxide (a catalyst and a polishing powder for steel)."

在化合物中的原子价为2和4。化合物包括氯化亚锡(用于电镀锡以及制造聚合物和染料)、氧化亚锡(制备化学试剂和电镀用的锡盐)、氟化亚锡、氯化锡(香水的稳定剂以及其它锡盐的原料)以及氧化锡(催化剂以及钢材的拋光粉)。

"It has valence 2 or 4 in compounds, including stannous chloride (used in tin galvanizing and manufacturing polymers and dyes), stannous oxide (used to make tin salts for chemical reagents and plating), stannous fluoride (used as an anticavity ingredient in toothpastes), stannic chloride (a stabilizer for perfumes and a source of other tin salts), and stannic oxide (a catalyst and a polish ing powder for steel)."

在化合物中的原子价为2和4。化合物包括氯化亚锡(用于电镀锡以及制造聚合物和染料)、氧化亚锡(制备化学试剂和电镀用的锡盐)、氟化亚锡、氯化锡(香水的稳定剂以及其它锡盐的原料)以及氧化锡(催化剂以及钢材的拋光粉)。

"It has valence 2 or 4 in compounds, including stannous chloride (used in tin galvanizing and manufacturing polymers and dyes), stannous oxide (used to make tin salts for chemical reagent s and plating), stannous fluoride (used as an anticavity ingredient in toothpastes), stannic chloride (a stabilizer for perfumes and a source of other tin salts), and stannic oxide (a catalyst and a polishing powder for steel)."

在化合物中的原子价为2和4。化合物包括氯化亚锡(用于电镀锡以及制造聚合物和染料)、氧化亚锡(制备化学试剂和电镀用的锡盐)、氟化亚锡、氯化锡(香水的稳定剂以及其它锡盐的原料)以及氧化锡(催化剂以及钢材的拋光粉)。

"It has valence 2 or 4 in compounds, including stannous chloride (used in tin galvanizing and manufacturing polymers and dyes), stannous oxide (used to make tin salts for chemical reagents and pla tin g), stannous fluoride (used as an anticavity ingredient in toothpastes), stannic chloride (a stabilizer for perfumes and a source of other tin salts), and stannic oxide (a catalyst and a polishing powder for steel)."

在化合物中的原子价为2和4。化合物包括氯化亚锡(用于电镀锡以及制造聚合物和染料)、氧化亚锡(制备化学试剂和电镀用的锡盐)、氟化亚锡、氯化锡(香水的稳定剂以及其它锡盐的原料)以及氧化锡(催化剂以及钢材的拋光粉)。

The rare earth oxide and strontium salt can refine the basic structure 、 firstborn Si phase and firstborn α branch crystal.The dispered oxide grains as the second phases reinforced the alloys.

稀土氧化物及锶盐的加入使基体组织，尤其是初晶Si及初生树枝晶α相得到细化，弥散分布的氧化物颗粒起到第二相强化作用。

The invention adopts a low temperature solid state reaction method, proceeds from europium oxide, molybdenum oxide and strontium carbonate, and can synthesize the UV-excited europium-doped strontium molybdate LED red phosphor having stable chemical performance without high temperature calcinations. The method is high in maneuverability and good in reproducibility. The obtained product is stable in quality and regular in appearance.

本发明采用低温固相反应法从氧化铕，氧化钼与碳酸锶出发可以不需要高温煅烧合成出化学性能稳定、紫外激发LED用铕掺杂钼酸锶红色荧光粉，本发明方法的可操作性强，重现性好，所得产品质量稳定，形貌规整。

However, with the advancement of technology, modern chemical industries as well as the use of fossil fuels in mankind's daily lives which emit carbon dioxide, nitrogen oxide, sulphurate oxide and suspended air particulates etc.

然而伴随着科技日新月异的提高，现代化工产业以及人类生活中使用化石燃料所产生的二氧化碳、氮氧化物、硫氧化物与可悬浮颗粒物等可以改变原有的空气组成，并引起污染，造成全球气候变化，破坏生态平衡，影响人们的身体健康和生活质量。

The second is to cut a mere 100 calories from your diet , which is the equivalent of a tablespoon of butter.

第二个就是从你的饮食中减少一百卡路里，只是相当于一大汤匙的黄油。

This is where the Rorschach test comes in.

现在，罗氏测试就出现了。