Preparation of the Solid Electrolytes Li4＋xAlxSi1—xO4—yAl2O3 by the Sol—Gel Method and Study of Their Ionic Conductivity

ＩｎｔｒｏｄｕｃｔｉｏｎＬｉｔｈｉｕｍｉｏｎｃｏｎｄｕｃｔｏｒｓａｒｅｐｒｏｍｉｓｉｎｇｍａｔｅｒｉａｌｓｆｏｒｍａｎｙｋｉｎｄｓｏｆｅｌｅｃｔｒｏｃｈｅｍｉｃａｌａｐｐｌｉｃａｔｉｏｎ ,ｓｕｃｈａｓｅｌｅｃ ｔｒｏｌｙｔｅｓｆｏｒｈｉｇｈ ｅｎｅｒｇｙｄｅｎｓｉｔｙｂａｔｔｅｒｉｅｓ .1Ｔｈｅｐｒｏｐｅｒｔｉｅｓｏｆｈｉｇｈｉｏｎｉｃｃｏｎｄｕｃｔｉｖｉｔｙ ,ｈｉｇｈｄｅｃｏｍｐｏｓｉｔｉｏｎｐｏｔｅｎｔｉａｌ,ｓｔａｂｉｌｉｔｙａｎｄｃｏｍｐａｔｉｂｉｌｉｔｙａｇａｉｎｓｔｅｌｅｃｔｒｏｄｅｓｓ…     

Boron(III) Tribromide or Titanium(IV) Bromide and Lewis Base Promoted Baylis-Hillman Reaction

ＩｎｔｒｏｄｕｃｔｉｏｎＲｅｃｅｎｔｌｙ ,ｔｈｅＢａｙｌｉｓ Ｈｉｌｌｍａｎｒｅａｃｔｉｏｎｈａｓｂｅｃｏｍｅａｖｅｒｙｈｏｔｆｉｅｌｄｆｏｒｓｙｎｔｈｅｔｉｃｃｈｅｍｉｓｔｓ ,1 12 ｗｉｔｈａｒｅｃｅｎｔｅｘａｍｐｌｅｏｆａｃａｔａｌｙｔｉｃａｓｙｍｍｅｔｒｉｃｖｅｒｓｉｏｎ .13 ＩｔｈａｓｂｅｅｎｄｉｓｃｌｏｓｅｄｔｈａｔｔｈｅｃｏｍｂｉｎａｔｉｏｎｏｆａＬｅｗｉｓｂａｓｅｓｕｃｈａｓｃｈａｌｃｏｇｅｎｉｄｅｓ ,ａｍｉｎｅｓ ,ｐｈｏｓｐｈｉｎｅｓｏｒｑｕａｔｅｒｎａｒｙａｍｍｏ ｎｉｕｍｈａｌｉ…     

Theoretical Study on the Kinetics of Electron Transfer for Bond—breaking Reaction

ＩｎｔｒｏｄｕｃｔｉｏｎＦｒｅｅｒａｄｉｃａｌｆｏｒｍａｔｉｏｎｆｒｏｍｈａｌｏｇｅｎａｔｅｄｈｙｄｒｏｃａｒｂｏｎｓｈａｓｒｅｃｅｉｖｅｄｃｏｎｓｉｄｅｒａｂｌｅａｔｔｅｎｔｉｏｎｂｅｃａｕｓｅｏｆｉｔｓｓｃｉｅｎｔｉｆ ｉｃａｎｄｅｎｖｉｒｏｎｍｅｎｔａｌｒｅｌｅｖａｎｃｅ .1 6 Ｔｈｉｓｒｅａｃｔｉｏｎｓｅｅｍｓｔｏｐｌａｙａｎｉｍｐｏｒｔａｎｔｒｏｌｅｉｎｖａｒｉｏｕｓｐｒｏｃｅｓｓｅｓ .Ｂｏｎｄ ｂｒｅａｋ ｉｎｇｒｅａｃｔｉｏｎｉｓａｐｏｗｅｒｆｕｌｓｙｎｔｈｅｔｉｃｔｏｏｌｔｏｐｒｏｖ…     

Acidichromism in the Mixed Langmuir—Blodgett Films of Stearic Acid with a Carbazole—containing Schiff Base

ＩｎｔｒｏｄｕｃｔｉｏｎＲｅｖｅｒｓｉｂｌｅｃｏｌｏｒｃｈａｎｇｅｓｕｐｏｎｅｘｔｅｒｎａｌｏｒｉｎｔｅｒｎａｌｓｔｉｍｕｌａｔｉｏｎｓｈａｖｅｂｅｅｎａｔｔｒａｃｔｉｎｇｍｕｃｈａｔｔｅｎｔｉｏｎｄｕｅｔｏｔｈｅｉｒｕｔｉｌｉｔｙａｓｆｕｎｃｔｉｏｎａｌｍａｔｅｒｉａｌｓ .Ｆｏｒｅｘａｍｐｌｅ ,ｐｈｏ ｔｏｃｈｒｏｍｉｓｍｄｅｓｃｒｉｂｅｓｔｈｅｃｏｌｏｒｃｈａｎｇｅｓｉｎｄｕｃｅｄｂｙｐｈｏ ｔｏｉｒｒａｄｉａｔｉｏｎａｎｄｃａｎｂｅｕｓｅｄａｓｐｈｏｔｏ ｒｅｃｏｒｄｉｎｇｍａｔｅｒｉ ａｌｓ…     

Monitoring the Hydrolysis of p—Nitrophenyl Acetate Catalyzed by Seryl—histidine with Electrospray Ionization Mass Spectrometry

ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｔｈｅｐａｓｔｄｅｃａｄｅ ,ｉｔｗａｓｆｏｕｎｄｔｈａｔｔｗｏａｍｉｎｏａｃｉｄｒｅｓｉｄｕｅｓ ,ＳｅｒａｎｄＨｉｓ ,ｗｏｒｋａｓｔｈｅａｃｔｉｖｅｓｉｔｅｓｉｎｔｈｅｓｅｒ ｉｎｅｐｒｏｔｅａｓｅ .1 3 Ｉｎｏｕｒｐｒｅｖｉｏｕｓｗｏｒｋ ,ａｄｉｐｅｐｔｉｄｅｓｅｒｙｌ ｈｉｓｔｉｄｉｎｅ (Ｓｅｒ Ｈｉｓ)ｗａｓｆｏｕｎｄｔｏｈａｖｅｔｈｅｐｒｏｔｅｉｎａｎｄｎｕ ｃｌｅｏｓｉｄｅｓｃｌｅａｖａｇｅａｃｔｉｖｉｔｙ .4 7ｐ Ｎｉｔｒｏｐｈｅｎｙｌａｃｅｔａｔｅ (ｐ ＮＰＡ)ｗ…     

Molecular and Crystal Structure of 7—Hydroxy—6,8—dimethoxyl—coumarin

1　ＩＮＴＲＯＤＵＣＴＩＯＮＣｏｕｍａｒｉｎｉｓｏｎｅｋｉｎｄｏｆｔｈｅｌａｃｔｏｎｅｏｆｏｒｔｈｏ ｈｙｄｒｏｘｙｌｃａｓｓｉａａｃｉｄ .Ｉｔｃｏｍｐｏｓｅｓａｌａｒｇｅｎｕｍｂｅｒｏｆｃｏｕｍａｒｉｃｄｅｒｉｖａｔｅｓｅｒｉｅｓｂｅｃａｕｓｅｏｆｔｈｅｄｉｆｆｅｒｅｎｔｐｏｓｉｔｉｏｎｓ,ｋｉｎｄｓａｎｄｎｕｍｂｅｒｓｏｆｔｈｅｓｕｂｓｔｉｔｕｅｎｔｇｒｏｕｐｓｗｈｉｃｈｌｉｎｋｕｐｗｉｔｈｔｈｅａｒｏｍａｔｉｃａｎｄｌａｃｔｏｎｅｒｉｎｇｓ[1 ,2 ,3] .Ｔｈｉｓｋｉｎｄｏｆｃｏｍｐｏｕｎｄｓｅｘ…     

Synthesis of Titanium Silicalite—1 in the Presence of Tween 40

Ｔｒａｄｉｔｉｏｎａｌｌｙ ,ｔｈｅｈｙｄｒｏｔｈｅｒｍａｌｓｙｎｔｈｅｓｉｓｏｆｔｉ ｔａｎｉｕｍｓｉｌｉｃａｌｉｔｅ 1 (ＴＳ 1 )ｎｅｅｄｓａｌａｒｇｅａｍｏｕｎｔｏｆｔｅｔｒａｐｒｏｐｙｌａｍｍｏｎｉｕｍｈｙｄｒｏｘｉｄｅ (ＴＰＡＯＨ)ａｓａｔｅｍｐｌａｔｅ ( ｎ(ＴＰＡＯＨ) ｎ(ＳｉＯ2 ) =0 4～ 1 0 ) ,ａｎｄｔｈｅｃｒｙｓｔａｌｌｉｚａｔｉｏｎｔｉｍｅｔａｋｅｓ 10～ 30ｄ[1] .Ｒｅｃｅｎｔｌｙ ,ｍｕｃｈａｔｔｅｎｔｉｏｎｈａｓｂｅｅｎｐａｉｄｔｏｔｈｅｍｏｄｉｆｉｃａｔｉｏｎｏｆｓｙｎｔｈｅｓｉ…     

Atomic force microscopy observation of the condensates of the spermidine-DNA complexes

Ｂｅｉｎｇｔｈｅｍｏｓｔｅｓｓｅｎｔｉａｌｃｈｅｍｉｃａｌｍａｔｅｒｉａｌｉｎｌｉｖｉｎｇｏｒｇａｎｉｓｍｓ,ｔｈｅＤＮＡｉｎｖｉｒａｌｃａｐｓｉｄｓ,ｂａｃｔｅｒｉａｌｎｕｃｌｅｏｉｄｓ,ａｎｄｃｈｒｏｍｏｓｏｍｅｓｏｆｈｉｇｈｅｒｏｒｇａｎｉｓｍｓｏｎｌｙｏｃｃｕｐｉｅｓ104—106ｔｉｍｅｓｌｅｓｓｖｏｌｕｍｅｔｈａｎｉｔｄｏｅｓｗｈｅｎｅｘｉｓｔｓａｓｅｘｔｅｎｄｅｄｄｏｕｂｌｅｈｅｌｉｘｓｔｒｕｃｔｕｒｅｓ.Ｔｏｕｎｄｅｒｓｔａｎｄｈｏｗｔｈｅｇｅｎｅｔｉｃｉｎｆｏｒｍａｔｉｏｎｓｔｏｒｅｄｉ…     

Study on the Model for Regulation of the Allosteric Enzyme Activity

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｋｉｎｅｔｉｃｆｅａｔｕｒｅｏｆｌｉｇａｎｄｉｎｔｅｒａｃｔｉｏｎｓｗｉｔｈｍａｃｒｏ ｍｏｌｅｃｕｌｅｐｌａｙｓａｓｉｇｎｉｆｉｃａｎｔｒｏｌｅｉｎｂｉｏｌｏｇｉｃａｌｒｅｇｕｌａ ｔｉｏｎ .1,2 Ｍｕｌｔｉｓｕｂｕｎｉｔｐｒｏｔｅｉｎｓｓｕｃｈａｓｈｕｍａｎｈｅｍｏｇｌｏｂｉｎｆｒｅｑｕｅｎｔｌｙｅｘｈｉｂｉｔｃｏｏｐｅｒａｔｉｖｉｔｙ ,3 6ｗｈｉｃｈａｒｉｓｅｓｆｒｏｍａｃｏｕｐｌｉｎｇｂｅｔｗｅｅｎｔｈｅｅｆｆｅｃｔｓｏｆｌｉｇａｎｄｂｉｎｄｉｎｇａｔｔｈｅｉｎ…     

Flow—injection Chemiluminescence Sensor for the Determination of Gallic Acid by Immobilizing Luminol and Periodate on Anionexchange Resin

ＩｎｔｒｏｄｕｃｔｉｏｎＧａｌｌｉｃａｃｉｄｅｘｉｓｔｓｉｎｔｈｅｌｅａｖｅｓａｎｄｆｒｕｉｔｓｏｆｍａｎｙｔｙｐｅｓｏｆｐｌａｎｔｓａｎｄｉｓｗｉｄｅｌｙｕｓｅｄｉｎｍｅｄｉｃｉｎｅｆｏｒａｎｔｉ ｏｘｉ ｄａｔｉｏｎａｎｄａｎｔｉｂａｃｔｅｒｉａｌａｃｔｉｖｉｔｙ ,ａｎｔｉｆｌａｍｍａｔｏｒｙａｃｔｉｏｎａｎｄａｎｔｉ ｃａｎｃｅｒａｃｔｉｖｉｔｙ .1 5Ｉｎｓｐｉｔｅｏｆｔｈｅｈｅａｌｔｈｉｍｐｏｒｔａｎｃｅｏｆｇａｌｌｉｃａｃｉｄ ,ｉｔｓｍｅｔａｂｏｌｉｓｍａｎｄｋｉｎｅｔｉｃｓｉｎｔｈｅｈｕ…     

有孔虫中硼的分离及其正热电离质谱法测定

针对大洋钻探计划(0DP)钻孔中有孔虫数量少、硼含量低的特点，改进了硼特效树脂和阴、阳混合离子交换树脂相结合进行分离硼的方法，成功地实现了硼的分离，并且首次采用正热电离质语法测定了有孔虫中硼同位素的比值。由于硼的分离过程不产生同位素分馏，测定结果令人满意。     

Ion Exchange Extraction of Boron from Aqueous Fluids by Amberlite IRA 743 Resin

The ion exchange characteristics d Amherlite IRA 743 resin for extracting boron from aqueous fluids have been investigated in detail. The results show that AmherHte IRA 743 resin, a boron specific ion exchange resin, can quantitatively extract boron as the B (OH)4- spedes from weakly basle solution. Some exchangeable anions such as CI- and SO4^2- are present, resulting in an increase in pH value of the loeded solution within the nan, and the boron in natural aqueous fluids with low nH is also extracted by Amberlite IRA 743 resin. However, the voiume of loaded solution must be restricted. The maximum voiume of loaded solution giving quantitative extraction of boron decreases for sample soh.,tiom of lower pH value. Warm HCI solution is more effective than room temperature HCI solution for eluting boron from Amberllte IRA 743 resin.     

低硼富含有机质的河/雨水正热电离硼同位素的测定

对低硼富含有机质的河/雨水样品硼的分离方法及硼同位素组成的测定进行了研究.采用硼特效树脂富集河/雨水样品,结合微升华技术去除有机质;采用正热离子质谱法进行硼同位素组成的测定.全流程回收率在97.50%～101.17%之间,测试数据和多接受电感耦合等离子体质谱比较接近,测试精度小于0.05‰.经本方法处理后的样品能满足同...     

珊瑚中硼的分离及其同位素组成的测定

介绍了用硼特效树脂和阴、阳混合离子交换树脂相结合进行珊瑚中硼的分离和纯化方法，满足了正热电离质谱法测定硼同位素的要求，并且对几个珊瑚样品进行了硼的分离和硼同位素组成的测定，结果满意，为研究珊瑚中的硼同位素示踪古海洋环境变化提供了可能。     

Determination of total,leachable and mobile boron in sedimentary rocks by ICP-AES

An ion exchange batch technique is described, which allows to determine the amount of mobile boron in geological material. Boron selective ion exchange resin IRA-743 (0.5 g, effective size 0.45 mm) was slurried together with 5 g sample (grain size smaller than 0.04 mm) at 70 °C in aqueous solution. After separating resin and suspension by sieving, elution was done in columns with 3N HCl. Boron was determined in the eluates by ICP-AES. Possible corrections for the iron interferences on the boron emission lines are discussed. The mobile boron content in the investigated shallow marine sedimentary rocks ranged between 5 and 10% of the total. It must be assumed that most of the boron in the shales is fixed in the lattice of the minerals.Presented in part at the 1989 European Winter Conference on Plasma Spectrochemistry, Reutte, Austria     

Synthesis of new chiral ionic liquids from α-hydroxycarboxylic acids

New functionalized optically active N-methylimidazolium ionic liquids with an asymmetric center at the β-position to the imdazole ring were synthesized as bromide salts from optically active α-hydroxycarboxylic acids. The bromide anions were exchanged by carboxylate anions with Amberlite IRA 400 ionic exchange resin.     

负热电离质谱测定硼同位素的涂样试剂比较

目前人们并未注意到利用负热电离质谱方法测定硼同位素所采用涂样试剂中BO^-的同质异位素CNO^-离子的存在和影响。对硼同位素测定采用的不同涂样试剂进行比较，结果发现在去硼海水和硝酸盐溶液中存在BO2^-的同质异位素CNO^-离子，干扰离子不仅来自有机物，而且可能来自硝酸根。在硼同位素测定中，检查空白中的43峰和43／42比值是必要的。实验表明MgCl2 NaOH混合溶液是负热电离质谱测定硼同位素的较为理想的涂样试剂。     

Spectrophotometric Determination of Traces of Boron in High Purity Silicon

Abstract

A reddish brown complex is formed between boron and curcumin in concentrated sulphuric acid and glacial acetic acid mixture (1:1). the coloured complex is highly selective and stable for about 3 hours and has the maximum absorbance at 545 nm. the sensitivity of the method is extremely high and the detection limit is 3 parts per billion based on 0.004 absorbance value. the interference of some of the important cations and anions relevant to silicon were studied and it is found that 100 fold excess of most of these cations and anions do not interfere in the determination of boron. the method is successfully employed for the determination of boron in silicon used in semiconductor devices. the results have been verified by standard addition method.     

Use of chelating resin containing thioacetamide groups for the separation of copper

Summary A new chelating resin containing thioacetamide incorporated into the weakly acidic polymeric matrix Amberlite IRC-50, has been synthesised and investigated for its metal exchange characteristics. Among the various cations studied, copper(II) was found to have the highest capacity. On the basis of experimental results, the resin was employed for the separation and preconcentration of copper from several synthetic mixtures and also from a few analysed alloy samples.     

A straightforward protocol for Hf purification by single step anion-exchange chromatography and isotopic analysis by MC-ICP-MS applied to geological reference materials and zircon standards

A straightforward one-step Hf purification protocol for geological samples using common anion-exchange chromatography and isotopic measurements by multiple collector inductively coupled plasma mass spectrometry (MC-ICP-MS) is described in this paper. The sample is dissolved in concentrated HF–HNO₃ mixtures with round-bottom Savillex? Teflon screw-top capsules or high-pressure stainless steel jacketed Teflon bombs. After complete dissolution, the chemical separation between Hf and isobarically interfering elements such as Lu, Yb, and matrix elements like Ti, is performed and achieved simultaneously using a common one-step anion exchange resin (AG1-X8). The Hf yields are >90% and total procedural blanks are lower than 20 pg. This protocol not only avoids using multiple-stage ion exchange resins, but also eliminates perchloric acid to break down fluorides after HF treatment of the sample. In addition to whole rock, this protocol is also practical for zircon and baddeleyite Hf purification prior to isotopic measurement. New Hf isotopic data for zircon 91500, Temora, CN92-1 and FM0411, together with Phalaborwa baddeleyite are presented for this method. Multiple analyses of the international geological reference materials and standard zircon and baddeleyite used in U–Pb geochronology demonstrate that this method is simple, economic, efficient and reproducible.