Effect of Sputtering Parameters on Film Composition,Crystal Structure,and Coercivity of SmCo Based Films Deposited on Si （100） Substrates

The sputtering parameter mediated composition （SPMC） effect of 3.0-μm-thick SmCo-based films is experimentally and theoretically studied. The experimental results give a clear indication that the Sm concentration increases with the decreasing sputtering power or with the increasing Ar gas pressure, which are in agreement with the calculated values when the preferential sputtering effect is disregarded. The SPMC effect provides an opportunity for the same composite target to fabricate films with an Sm concentration varying from 13.8at.% to 17.3at.%, which is reasonable for the magnetic phase transformation （Sm2Co17→SmCo7→SmCo5） and the enhanced coercivity.     

具有抗糖尿病活性（拟）二肽分子的设计、合成及生物活性

采用液相缩合法,保护的苯丙氨酸衍生物和氨基葡萄糖衍生物分别与Fmoc氨基酸偶联,简便地得到9个未见报道的L-对硝基苯丙氨酸二肽衍生物4a～i和4个2-氨基-β-D-葡萄糖拟二肽衍生物8a～d,收率为52．4％～88．1％．4a～i选择性碱性水解,得到9个对应的水解产物5a～i,收率为64．4％-90．4％．产物的化学结构经1HNMR,13CNMR和HRMS表征及证实．体外抗糖尿病活性测试结果表明,某些化合物具有很强的抗糖尿病活性,其中化合物4c和8b的过氧化物酶体增殖物激活受体反应元件（PPRE）相对激动活性分别达到150．59％和185．23％,EC50分别为1．37uM和0．64uM,作为新型抗糖尿病先导分子值得进一步研究．     

水合肼还原重量法测定银

样品经过硝酸分解后,用过量的氨水分离铅、铁、铝等金属离子,用EDTA掩蔽铜、锌和其他残留的金属离子,用水合肼作还原剂,将银还原成单质沉淀,过滤,洗涤,灼烧,恒重。该方法用于实际样品测定,结果与其他方法测定值一致,误差均在允许范围内;分别对银含量为2.54%和10.00%的样品重复测定12次,相对标准偏差（RSD）分别为1.50%和0.64%,此方法适用于1%以上银含量的测定。     

钢渣中游离氧化镁含量的测定

研究和提出了以硝酸铵-乙醇作为提取剂提取活性氧化镁（即游离氧化镁）的分析方法。通过正交实验,选取了最佳的提取条件。样品平行测定的相对标准偏差在0.51%～2.13%之间,回收率实验结果为98.2%～99.0%,表明该实验的精密度和准确度均较好。采用硝酸铵-乙醇作为提取剂提取游离氧化镁的分析方法,实现了钢渣中游离氧化镁的快速、准确测定,为钢渣的回收再利用提供了依据。     

湖州表层土壤稀土元素含量及分布特征

为了研究湖州表层土壤样品中稀土元素的分布特征,利用ICP-MS测定了土壤中稀土元素的含量。结果表明湖州表层土壤中稀土元素含量的大小顺序为：Ce＞La＞Nd＞Pr＞Sm＞Gd＞Dy＞Yb＞Er＞Eu＞Ho＞Tb＞Tm＞Lu,遵循Oddo-Harkins法则。湖州表层土壤中稀土元素的分量均值和总量均值皆高于全国水平,稀土元素存在显著的分馏现象,轻稀土元素明显富集。表层土壤中Ce和Eu都有部分亏损。     

High performance liquid chromatography with immobilized Ru(bpy)_3~(2+)-KMnO_4 chemiluminescence detection and its application in metabolism of repaglinide in pig liver microsomes

A novel high performance liquid chromatography-chemiluminescence（HPLC-CL） method for investigation of in vitro metabolism of repaglinide in pig liver microsomes with microdialysis sampling technique was developed.The chromatographic separation was performed on a Hypersil BDS-C18 column with an isocratic mobile phase consisting of methanol and 0.01 mol/L KH₂PO₄（pH 3.0）（volume ratio 75:25） at a flow rate of 1.0 mL/min.The detection was based on the chemiluminescence reaction of repaglinide with acidic potassium permanganate（KMnO₄） and tris（2,2’-bipyridyl）ruthenium（Ⅲ）(Ru（bpy）₃³⁺),which was immobilized on the cationic ion-exchange resin for obtaining high sensitivity and reducing consumption of expensive reagent.     

Melamine-(H_2SO_4)_3 and PVP-(H_2SO_4)_n as solid acids:Synthesis and application in the first mono-and di-nitration of bisphenol A and other phenols

Melamine and poly vinylpyrrolidone（PVP） reacted with neat sulfuric acid readily to form two new organic solid acids namely melamine-（H₂SO₄）₃ and PVP-（H₂SO₄）_n.These solid acids were used for the first nitration of bisphenol A as well as other phenols in the presence of NH₄NO₃.Mono- and di-nitro bisphenol A have been characterized with IR and ¹H NMR techniques.     

PPA-SiO_2 catalyzed efficient synthesis of polyhydroquinoline derivatives through Hantzsch multicomponent condensation under solvent-free conditions

Silica gel-supported polyphosphoric acid（PPA-SiO₂） was found to be an efficient catalyst for the one-pot four-component Hantzsch condensation reaction of aryl aldehydes,dimedone,ethyl acetoacetate and ammonium acetate to afford the corresponding polyhydroquinoline derivatives in high yields.The main advantages of the present approach are short reaction times,clean reaction profiles,simple experimental and workup procedures.     

双（2,2-二硝基丙基）甲缩醛的结构和爆轰性能的量子化学研究

利用B3LYP/6-311＋G（2d,p）方法对一种新型含能增塑剂双（2,2-二硝基丙基）甲缩醛进行几何优化,计算了其红外光谱、生成焓和爆轰特性. 分析了最弱键的键离解能和键级并预测了目标化合物的热稳定性. 结果表明双（2,2-二硝基丙基）甲缩醛中的四个N-NO2键的键离解能都为164.38 kJ/mol. 表明目标化合物是一个热力学性能稳定的化合物. 以凝聚相生成焓和分子密度为基础,采用Kamlet-Jacobs方法预测其爆速和爆压. 目标化合物的晶体结构属于P21空间群.     

水下超疏油聚(3,4-乙烯基二氧)噻吩薄膜的制备简

以离子液体溴化(1-己基-3-甲基咪唑盐)作为电解质和掺杂剂采用电化学一步法制备了微纳米复合结构的聚(3,4-乙烯基二氧噻吩)薄膜,薄膜由槽内排布着纳米珠链的棒状结构组成. 研究表明,通过控制电流密度的大小,可以调节棒状结构和珠状结构的平均直径. 离子液体中的咪唑阳离子和对阴离子均掺杂到聚合物中,该薄膜具有可逆的电化学活性及水下超疏油特性.