THE METALLOGENIC STRUCTURE OF VEIN-SHAPED LEAD-ZINCDEPOSIT IN HENGSHANLING-SHEXINGPING,CHENZHOU,HUNAN

ＴＨＥＭＥＴＡＬＬＯＧＥＮＩＣＳＴＲＵＣＴＵＲＥＯＦＶＥＩＮ－ＳＨＡＰＥＤＬＥＡＤ－ＺＩＮＣＤＥＰＯＳＩＴＩＮＨＥＮＧＳＨＡＮＬＩＮＧ－ＳＨＥＸＩＮＧＰＩＮＧ，ＣＨＥＮＺＨＯＵ，ＨＵＮＡＮＳｕｎＺｈｅｎｇｉａＰｅｎｇＥｎｓｈｅｎｇＺｈｕＹｕｄｅ（Ｄｅ...     

APPROXIMATION OF THE HOLE VOLUME PERCENTAGE_FOR TN_（12）M_（10－）ALLOY MADE BY SHS－METHOD~＋

ＡＰＰＲＯＸＩＭＡＴＩＯＮＯＦＴＨＥＨＯＬＥＶＯＬＵＭＥＰＥＲＣＥＮＴＡＧＥＦＯＲＴＮ_（１２）Ｍ_（１０）－ＡＬＬＯＹＭＡＤＥＢＹＳＨＳ－ＭＥＴＨＯＤ~＋￥ＹａｎｇＧｕｏｔａｏ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎ?..     

STATE SPACE METHODS FOR DECENTRALIZED H_∞ CONTROL

ＳＴＡＴＥＳＰＡＣＥＭＥＴＨＯＤＳＦＯＲＤＥＣＥＮＴＲＡＬＩＺＥＤＨ＿∞ＣＯＮＴＲＯＬＳＴＡＴＥＳＰＡＣＥＭＥＴＨＯＤＳＦＯＲＤＥＣＥＮＴＲＡＬＩＺＥＤＨ＿∞ＣＯＮＴＲＯＬ￥ＷｕＭｉｎ；ＧｕｔＷｅｉｈｕａ；ＣｈｅｎＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＡ...     

METALLOGENIC CONDITIONS OF GOLD-BEARING SKARN DEPOSITS ALONG THE MIDDLE-LOW ER REACHES OF THE YANGTZE RIVER

ＭＥＴＡＬＬＯＧＥＮＩＣＣＯＮＤＩＴＩＯＮＳＯＦＧＯＬＤ－ＢＥＡＲＩＮＧＳＫＡＲＮＤＥＰＯＳＩＴＳＡＬＯＮＧＴＨＥＭＩＤＤＬＥ－ＬＯＷＥＲＲＥＡＣＨＥＳＯＦＴＨＥＹＡＮＧＴＺＥＲＩＶＥＲＺｈａｎｇＳｈｕｇｅｎＷａｎｇＤａｗｅｉ（Ｄｅｐａｒｔｍｅｎｔｏ...     

ANEWUNDERSTANDINGOFTHEUPLIFTOFTH

ＡＮＥＷＵＮＤＥＲＳＴＡＮＤＩＮＧＯＦＴＨＥＵＰＬＩＦＴＯＦＴＨＥＱＩＮＧＨＡＩ－ＸＩＺＡＮＧ（ＴＩＢＥＴ）ＰＬＡＴＥＡＵＣｈｅｎＧｕｏｄａ（ＩｎｓｔｉｔｕｔｅｏｆＤｉｗａＴｈｅｏｒｙａｎｄＭｅｔａｌｏｇｅｎｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒ...     

THE GENETIC CHARACTERISTICS OF THE CUPREOUS PORPHYRIES IN SHANYANG DISTRICT,

ＴＨＥＧＥＮＥＴＩＣＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＴＨＥＣＵＰＲＥＯＵＳＰＯＲＰＨＹＲＩＥＳＩＮＳＨＡＮＹＡＮＧＤＩＳＴＲＩＣＴ，ＳＨＡＮＸＩＰＲＯＶＩＮＣＥＺｈａｎｇＹａｘｉｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｌｏｇｙ，ＣｅｎｔｒａｌＳｏｕｔ...     

关于服装表演专业与考生选拔标准及方法的探讨

关于服装表演专业与考生选拔标准及方法的探讨刘相臣ＥＸＰＬＯＲＩＮＧＴＨＥＳＴＡＮＤＡＲＤＳＡＮＤＡＰＰＲＯＡＣＨＥＳＩＮＣＨＯＯＳＩＮＧＥＸＡＭＩＮＥＥＦＯＲＣＬＯＴＨＩＮＧＳＨＯＷＳＰＥＣＩＡＬＴＹ￥／／刘相臣北京服装学院直属于纺织总会，是一所以服...     

ISOTHERMAL KINETICS OF THE FIRST STAGE REDUCTION OF MAGNETITE COLD BOND PELLETS WITH CARBON MONOXIDE

ＩＳＯＴＨＥＲＭＡＬＫＩＮＥＴＩＣＳＯＦＴＨＥＦＩＲＳＴＳＴＡＧＥＲＥＤＵＣＴＩＯＮＯＦＭＡＧＮＥＴＩＴＥＣＯＬＤＢＯＮＤＰＥＬＬＥＴＳＷＩＴＨＣＡＲＢＯＮＭＯＮＯＸＩＤＥ＊ＣｈｅｎＱｉｙｕａｎＺｈｏｕＨｏｎｇＺｈａｎｇＰｉｎｇｍｉｎ（Ｄｅｐａｒｔｍ...     

DUAL－FREQUENCYANDMULTI－PARAMETERIPIN

ＤＵＡＬ－ＦＲＥＱＵＥＮＣＹＡＮＤＭＵＬＴＩ－ＰＡＲＡＭＥＴＥＲＩＰＩＮＳＴＲＵＭＥＮＴＡＮＤＩＴＳＡＰＰＬＩＣＡＴＩＯＮＲＥＳＥＡＲＣＨＢａｏＧｕａｎｇｓｈｕＨｅＪｉｓｈａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｌｏｇｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖ...     

EMPLACEMENT MECHANISM OF THE SUPER-LARGE JINGSHAN GOLD DEPOSIT IN JIANGXI,CHINA

ＥＭＰＬＡＣＥＭＥＮＴＭＥＣＨＡＮＩＳＭＯＦＴＨＥＳＵＰＥＲ－ＬＡＲＧＥＪＩＮＧＳＨＡＮＧＯＬＤＤＥＰＯＳＩＴＩＮＪＩＡＮＧＸＩ，ＣＨＩＮＡＬｉＰｅｉｚｈｅｎｇＷｕＹａｎｇｚｈｉＺｈｏｕＪｕｅｃｈｅｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｌｏｇｙ，Ｃｅ...     

聚合物反胶团萃取氨基酸的研究

利用德国BASF公司生产的Pluronic型和PluronicR型两类嵌段聚合物制备聚合反应胶团萃取氨基酸（L－苯丙氨酸和L－异亮氨酸）， 聚合物反胶团对氨基酸的萃取平衡特性，实验表明，聚合物反胶团对氨基酸的萃取平衡时间与纯有机溶剂的物理萃取相比差别很小，溶质在反胶团外壳部分与其内部水池间的平衡分配系数K都普遍较大，另外，当氨基酸水溶液的PH值接近等电点时，反胶团萃取达到最佳效果。通过理论分析得到如下推断，聚合物反胶团对两亲性氨基酸的增溶主要在基外壳部分，很可能是包裹在聚氧丙烯外壳内或缠绕在聚氧丙烯链之间，亲油作用和氢键作用是聚合物反胶团萃取的主要推动力。     

PBT-PA_6嵌段共聚物的合成、结晶与熔融

本文探讨通过溶剂溶解后,达到均匀混合的聚对苯二甲酸丁二酯(简称PBT)和聚己内酰胺(简称 PA_6)均聚物间,通过固相聚合反应合成 PBT-PA_6嵌段共聚物的新方法。并以 DSC、WAXD 和 TG 方法探讨了 PBT-PA_6的结晶、熔融及热稳定性。     

介孔碳片的合成及吸附脱硫性能

采用溶胶-凝胶法,以三嵌段共聚物聚氧化乙烯氧化丙烯氧化乙烯EO27- PO61-EO27 (P104)为模板剂,蔗糖为共模板,正硅酸乙酯(TEOS)为硅源,在强酸性及无机盐存在条件下制备出介孔硅片,并以此为硬模板,通过浓硫酸处理的方法成功制备了介孔碳片.并采用扫描电子显微镜、N2吸附-脱附实验对合成的介孔碳片进行了表征...     

PLLA-PEG-PLLA三嵌段共聚物的合成及性能

以萘钾和聚乙二醇形成大分子引发剂,在超声波震荡下引发L-丙交酯开环共聚,合成出不同EO/LA物质的量比的PLLA-PEG-PLLA三嵌段共聚物。利用FT-IR和1HNMR表征了三嵌段共聚物的结构。通过接触角和吸水率测试表明共聚物的亲水性是随着EO含量的增大而增强。采用DSC和POM研究共聚物的热性能和结晶形貌表明,共聚物各段熔点比各自均聚物低且有一个Tg,由于共聚物中EO/LA物质的量比的不同,表现出某段的单独结晶或两段都不结晶。因此,可通过改变嵌段含量,制备不同性能的材料,扩大聚乳酸的应用范围。     

Synthesis and Characterization of Poly(L-lactide-co-glycolide)

1Introduction Poly(lactide co glycolides)(PLGA)isawidelyin vestigatedbiodegradablecopolymer.Thebiocompatible andbiodegradablepolymersaresafeinthebodyandare hydrolyzedintometabolicby products.Recentlythese polyestermaterialshavebeenextensivelyusedinbiomate…     

Synthesis and characterization functionalized poly （ether ether ketone）s with carboxylic groups

A novel type of aromatic poly(ether ether ketone)s with carboxyl groups were prepared by polycondensation of 4,4-bis(4-hydroxyphenyl)pentanoic acid with difluoro-monomers.Their molecular structures were determined by 1H-NMR and IR,respectively.Their molecular weights were measured by gel permeation chromatography(GPC),which showed that all the polymers had high molecule weights(42 000).Due to the long side chains of polymers,all the polymers had good solubility(soluble in NMP,DMAc,THF,etc.).The differential scanning calorimeter(DSC) detected their excellent glass transition temperatures(Tg) up to 195 ℃.The Tg increased with the content of carboxylic units in the polymer chains,because the interactions of H bonds increased with increasing content of carboxylic.The polymers could form transparent and flexible films,which make them a candidate for membrane materials.     

聚乳酸共混物相容性的测试

采用熔融共混的方法制备聚乳酸(PLA)/聚甲基丙烯酸甲酯(PMMA)共混物相容性问题.研究结果表明在我们所研究PMMA分子量范围内,无定形DL-PLA与PMMA具有较好的相容性,并符合Gor-don-Taylor公式.当结晶型PLLA与PMMA熔融共混时,PMMA的引入破坏了PLLA的结晶,PLLA与PM-MA也表现出良好的相容性.     

可生物降解多嵌段聚乳酸共聚物合成研究

以氧化锌为催化剂,使左旋丙交酯(LLA)与聚乙二醇(PEG600)开环共聚,得到三嵌段(HO PLLA PEG PLLA OH)预聚物;再以甲苯二异氰酸酯TD1 80为扩链剂对其进行扩链,得到多嵌段共聚物.采用核磁共振、红外光谱、凝胶渗透色谱等对目标产物的结构、分子量分布进行了表征;同时用变温红外法研究了与LLA结晶相关谱带的位置,并对其进行了归属.     

Synthesis and characterization of polyepichlorohydrin-based copolymers with biphenyl groups attached thioether unit

Three novel copolymers,poly[1-(4-(benzothiazole-2-thio-alkyloxy)-biphenyl-4'-oxy)2.3-epoxypropane]s,were synthesized by the reaction of polyepichlorohydrin with obtained monomers,4-(benzothiazole-2-thio-alkyloxy)biphenyl-4'-ols,in which the number of methylene unit in substitution group of biphenyl group was 2,4,6,respectively.The structures of obtained compounds were confirmed by elemental analysis and 1H NMR.The decomposition temperatures of copolymers were near 340 ℃.Differential scanning calorimetry(DSC) measurement and polarized optical microscopy(POM) observation showed the resulting copolymers did not exhibit thermotropic liquid crystalline mesomophism and belonged to semi-crystalline substance.     

Ni(OH)_2和NiO空心球壳的纳米构筑

以苯乙烯-丙烯酸共聚物(PSA)乳胶粒为模板,分别制备了结构新颖的α-Ni(OH)2和Ni O的空心球壳。在适宜的条件下,首先在PSA乳胶粒表面生长一层Ni(OH)2,制得核壳结构的复合微球。用有机溶剂溶去模板得到Ni(OH)2空心球壳;在空气中焙烧除去模板,得到的是Ni O空心球壳。经物相分析表明壳层是α-Ni(OH)2。用TEM、SEM对核壳结构微球和空心微球的形貌和微结构进行分析。结果表明,壳层是由片状的Ni(OH)2纳米晶构筑而成,焙烧后得到的Ni O空心球壳是由片状的Ni O纳米晶构筑而成。