查询词典 tetravalent

Effects of roast temperature, roast time, the amounts of sodium carbonate on decomposition of bastnaesite concentrate and effects of leaching temperature, leaching time, concentration of hydrochloric acid, the amounts of hydrochloric acid on leaching ratio of trivalent rare earth and tetravalent cerium was studied systematically.

系统地研究了焙烧温度、焙烧时间和碳酸钠的加入量对氟碳铈矿精矿焙烧分解的影响及浸出时间、浸出温度、盐酸浓度和盐酸用量对三价稀土和铈的浸出率的影响。

ChimeriVax has also been applied to development of Sanofi Pasteur's tetravalent dengue vaccine, which has successfully demonstrated proof-of-concept in a Phase 2 trial by generating 100% seroconversion to all four dengue virus serotypes.

ChimeriVax也适用于赛诺菲巴斯德的四价登革热疫苗，已成功地证明，证明在一个第二阶段试验的观念，产生100％转阴到所有四个血清型登革热病毒的发展。

An abundant nonmetallic tetravalent ''.

一种丰富的非金属四价''。

CITIC Securities report further pointed out that the companies within the next three years of seasonal influenza vaccine will be 2.5 billion in sales revenue, tetravalent meningitis vaccine revenues will reach 2 billion yuan, hepatitis B vaccine revenue at 1.2 billion yuan, will become the company's vaccines business The main driver of growth is forecast to the company in 2009 -2011 years of EPS were 0.87 yuan, 1.06 yuan and 1.41 yuan, to maintain the company "overweight" rating, target price of 44.55 yuan.

中信证券报告进一步指出，未来三年内公司季节性流感疫苗将达到2.5亿元的销售收入，四价流脑疫苗收入将达到2亿元，乙肝疫苗收入将达到1.2亿元，疫苗业务将成为公司高速增长的主要驱动力，预测公司2009年-2011年的EPS分别为0.87元、1.06元和1.41元，维持公司&增持&的评级，目标价为44.55元。

A method for producing fatty acid alkyl esters and/or glycerin comprising a step of bringing a fat or oil into contact with an alcohol in the presence of a catalyst, wherein the catalyst is at least one catalyst selected from the group consisting of the following to: a metal oxide having an ilmenite structure and/or a slyrankite structure; an oxide containing a metallic element belonging to the Group 12 and a metallic element belonging to the Group 4; a mixed oxide containing a metallic element belonging to the Group 12 and a tetravalent transition metallic element; a metal oxide containing zirconium and at least one metallic element selected from the group consisting of metallic elements belonging to the Groups 4, 5 and 8; and a metal oxide containing anatase type titanium oxide and/or rutile type titanium oxide, and the metal oxide containing a sulfur component of 700 ppm or less.

脂肪酸烷基酯和/或甘油的制造方法包括在催化剂的存在下使脂肪或油与醇接触的步骤，其中，所述催化剂是选自由下列～所组成的组中的至少一种催化剂：具有钛铁矿结构和/或斯里兰卡石结构的金属氧化物；含有属于第12族的金属元素和属于第4族的金属元素的氧化物；含有属于第12族的金属元素和四价过渡金属元素的混合氧化物；含有锆和选自由属于第4、5和8族的金属元素所组成的组中的至少一种金属元素的金属氧化物；和含有锐钛矿型氧化钛和/或金红石型氧化钛的金属氧化物，并且所述金属氧化物含有的硫成分为700ppm以下。

A tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors.

一种四价非金属元素，地壳中含量仅次于氧，见于粘土、长石、石英和沙中，在晶体管中用作半导体。

Seven inactivated tetravalent vaccines of Riemerella anatipestifer,of which three (1#,3#,7#) employed oil-emulsion,two(4#,6#) employed propolis,two(8#,10#) employed aluminum hydroxide as their basic adjuvants,were developed and compared by the methods as follows:challenges were performed by homologous virulent RA strains to measure their protective abilities;indirect enzyme-linked immunosorbent assay was used to monitor antibody production;lymphocyte transformation test was performed to study the expression of cell-mediated immunity.

本实验通过对供试鸭的攻毒保护试验、通过用ELISA方法对供试鸭特异性抗体消长规律的研究以及通过用~3H-TdR掺入法对供试鸭T细胞免疫水平的检测三个方面对所研制的七种不同佐剂类型的鸭疫里氏杆菌四价灭活苗的免疫原性进行了比较研究。

Thus, SRB were likely to reduce sulfates to sulfides simultaneously with petroleum oxidization, and directly or indirectly reduce hexavalent uranium U to tetravalent uranium U to precipitate pitchblende.

于是，利用烃类作为生存的碳源，硫酸盐还原菌将硫酸盐还原的同时，直接或间接地把六价铀U还原成四价铀U，导致沥青铀矿形成。

A salt containing the negative tetravalent radical Fe6, used in making blue pigments, blueprint paper, and ferricyanide.

维生素 b也在一些食物中含有，如面包酵母，马麦脱酸制酵母，扁豆，糙米和牛、羊肉。

The normal method was through the hydrolysis and poly-condensation process of tetravalent metal alkoxides and inside which rare earth dopants are simply performed by dissolving salts into initial sol, thus makes matrices being introduced a higher percent of hydroxyl groups, affects the resulting luminescence efficiency and balance of two phases.

普通的方法为将稀土盐导入金属烷氧基化合物的溶胶然后水解缩聚，这使得金属离子分离的最小化过程受限以及含羟基过多，极大影响了发射效率和两相均衡。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。