二钠

A resonance light scattering method for the determination of critical micelle concentration of sodium dodecyl benzene sulfonate was proposed.

利用共振光散射技术在不引入探针的条件下，建立了室温下直接测定十二烷基苯磺酸钠的临界胶束浓度的方法。

Alcohols, mixing ratio of alcohol, and surfactant are the factors affecting the stability of microemulsions.

醇的种类，醇与二辛基琥珀酸磺酸钠的比值影响微乳的稳定性。

The original defined adakitesare sodium igneous rocks, they are tonalite, trondhjemite or (plagioclase-rich) granodiorite in whole-rock chemistry; however, the K-rich "C-type" adakite defined by Chinese scholars are potassic igneous rocks, they are granite, quartz monzonite and (alkali feldspar-rich) granodiorite, etc.

最初定义的埃达克岩是钠质火成岩，其全岩化学成分相当于英云闪长岩、奥长花岗岩和花岗闪长岩；而富钾的"C型埃达克岩"全岩化学成分相当于花岗岩、石英二长岩和花岗闪长岩。

The purpose of the research was to provide experimental basis for the application of Nasturtium officinale R. Br. in controlling and restoring eutrophic surface water bodies polluted with SDBS.

［目的］为西洋菜在治理和修复十二烷基苯磺酸钠污染的富营养化地表水体中的应用提供试验依据。

Group TPN(n =6)received 70 kcal· kg-1· d-1 of nonprotein calorieand 0.56 g· kg-1· d-1 of nitrogen.1 g/kg of FDP was also infused to the animals in group TPN + FDP(n = 7)everyday.

第二组为加用1，6-二磷酸果糖的实验组(TPN+FDP组，n=7)，在常规TPN液中加入每天每千克体重1克FDP钠盐。

Methods Tissue culture was used to study the cataractous lenses of rats induced by sodium selenite or galactose. At the early stage, the content of nonprotein sulfhydryl, protein sulfhydryl, non-soluble disulfide bond, malonaldehyde and the activities of glutathione peroxidase, glutathione reductase and glutathione-S-transferase were measured in the cataractous lenses, and they were compared with that of the normal lenses. Results The two kinds of material could all induce cataract in rats, sodium selenite being more potent.

采用器官培养方法，以不同浓度亚硒酸钠及半乳糖作用于晶状体，诱发大鼠晶状体形成白内障，在培养初期测定晶状体内非蛋白质巯基（nonprotein sulfhydryl， NP-SH、蛋白质巯基（protein sulfhydryl ，P-SH）和不溶性蛋白质二硫键的含量，脂类过氧化水平，以及与谷胱甘肽代谢有关的谷胱甘肽过氧化物酶(GSH peroxidase， GSH-PX)、谷胱甘肽还原酶(GSH reductase， GSSG-R)及谷胱甘肽硫转移酶(GSH S transferase， GSH-S)的活性。

In the second formation of the Langshan group in the Dongshengmiao polymetallic pyrite deposit, metamorphic basic volcanic rock s have been discovered,except quartz keratophyre, with a blastoporphyritic texture containing albite and oligoclase and minor, pyroxen and hornblende.

东升庙硫－多金属矿床狼山群二组含矿地层中，除已发现的变质石英角斑岩之外，又找到具有变余斑状结构（斑晶主要为钠质斜长石，另有少量辉石和角闪石）的变质基性火山岩和变质凝灰岩夹层以及火山岩屑与晶屑。

Melamine orthophosphate and melamine pyrophosphate are prepared by reaction of ammonium dihydrogen phosphate or sodium pyrophosphate with melamine and hydrogen chloric acid.

以磷酸二氢铵、焦磷酸钠、三聚氰胺及盐酸为原料，制备了三聚氰胺正磷酸盐和三聚氰胺焦磷酸盐。

Geochemical analyses include 'total'(concentrated HNO3 -HCl digestion) and chemical forms (three step sequential digestion, reducible, oxidizable and residual forms) of heavy metals Cu, Zn, Pb, Cr,Fe and Mn, iron oxides dithionite-citrate-bicarbonate (DCB and ammonium in the dark extraction as the estimation of total and amorphous iron oxides, respectively, total sulfur and organic matter.

化学分析包括重金属（Cu、Zn、Pb、Cr和Fe、Mn）"总量"（浓HNO3、HCl提取，非严格的总量）、形态（三步提取法，可还原态、可氧化态和残渣态）、氧化铁（连二亚硫酸钠－柠檬酸钠－重碳酸钠提取和草酸铵提取分别估计总氧化铁和无定形氧化铁）、总硫和有机质，并比较了DCB提取前后样品磁性特征的变化。

Extracting conditions such as temperature,the concentration of sulfuric acid are optimized.Test results show that leaching rate of vanadium pentoxide is up to 92% at the temperature of 90 ℃,with mass ratio of l...

实验结果表明，在MnO2用量3%、温度90℃、液固比2∶1、反应时间9 h、硫酸的浓度为20%、搅拌速度为1 500 r/m in的优化条件下，五氧化二钒浸出率为92%，比钠盐焙烧工艺高出10%以上，环境污染和能源消耗也得到有效控制。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。