Thermal Behavior of Zn(Thr)SO_4·H_2O

IntroductionRecently,a considerable interest has been fo-cused on the complexes of zinc with amino acidsdue to their excellent additives in medicine foodstuff and cosmetics[1— 6] .The investigation on thethermal behavior and the thermochemistry of somezinc amino acids is important to its further applica-tion,which has been reported in references[4,5 ,7— 1 0 ].However,the studies on solid complexZn( Thr) SO4· H2 O has not been reported,whichcan provide the necessary data and the foundation…     

The Influence of Muffin-tin Approximation on Energy Band Gap

ＩｎｔｒｏｄｕｃｔｉｏｎＳｉｎｃｅｉｔｓｐｒｅｓｅｎｔａｔｉｏｎ，ＬＭＴＯ－ＡＳＡ（ＬｉｎｅａｒＭｕｆｉｎ－ＴｉｎＯｒｂｉｔａｌ－ＡｔｏｍｉｃＳｐｈｅｒｅＡｐ－ｐｒｏｘｉｍａｔｉｏｎ）ｈａｓｂｅｅｎｗｉｄｅｌｙａｐｐｌｉｅｄｔｏｓｏｌｖｉｎｇｔｈｅｐ...     

THE FABRICATION OF CARBON AEROGELS BY GELATION IN ISOPROPANOL WITH BASIC CATALYST

1.INTRODUCTIONIn1987,Pekalapatentedthefirstorganicaerogel,i.e.resorcinol-formaldehydeorganicaerogel,undercarbondioxidesupercriticalcondition[1],whichcanbepyrolyzedinaninertatmospheretoformcarbonaerogelduetoahighlycrosslinkingstructure[2].Duetotheiruniquemicrostructureconsistingofporesandparticleswithnanometersize,carbonaerogelsareexpectedtobeusedasthermalandphonicinsulators,electricdoublelayercapacitors,chromatographicpackings,adsorbents,andcatalystsupports[3,4].Uptonowhowever,carbonaerog…     

HIGH SOLIDS-CONTENT NANOSIZE POLYMER LATEXES MADE BY A MODIFIED EMULSION COPOLYMERIZATION

1.INTRODUCTIONSince1980,agreatdealofresearchinteresthasbeendevotedtomicroemulsionpolymerization[1~10].Amicroemulsionmaybedefinedasthermodynamicallystableandopticallytransparentdispersioncomposedbywater,oilandsurfactant;inmanycasesacosurfactantisrequired.Microemulsionpolymerizationprocesscanyieldstablepolymerlatexeswithparticlesizeofabout10nmto100nm.However,therearetwomajordrawbacks,whichhavelimitedtheapplicationsofmicroemulsionpolymerization:(1)highsurfactantconcentration(upto20wt.%ofthet…     

SYNTHESIS OF A NOVEL CHELATING RESIN WITH HETEROCYCLIC RING OF S AND N

1.INTRODUCTIONThechelatingresinswithheterocyclicringofsulfur,oxygen,andnitrogenhaveexcellentadsorptionformetallicionsespeciallyfornoblemetallicions[1~3].Generally,theabove-mentionedresinsweresynthesizedbythereactionsofchloromethylatedpolystyrenewithheterocycliccompoundsinthepresenceofbase[3].Inthispaper,anewmethodforpreparingchelatingresincontaining2-amino-3-thiazoline(ATZ)wasreported.Thedetailedreactionscan2.EXPERIMENTAL2.1MaterialsEPSandBEPSweresynthesizedaccordingtothemethodde…     

Studies on Non-potentiometric Piezoelectric Sensor System for Determination of Vitamin B_1

IntroductionVitamin B1plays a very important role in theaction of certain coenzymes and the prevention ofsome diseases.Vitamin B1exists in an aqueous so-lution in two forms,i.e.,the double- protonatedform ata lower p H value and the single- protonatedform ata higher p H value.The distribution ratio ofthe two forms changeswith the variation ofp H val-ue of the solution tested. The accurate determina-tion of vitamin B1is very important in both foodand pharmaceutical areas.Various analytical m…     

不同生境拟穴青蟹螯足肌肉营养品质评价

为探究不同生境、不同食物源拟穴青蟹(Scylla paramamosain，以下简称“青蟹”)的螯足肌肉营养品质的差异，本研究通过采集5种不同生境青蟹(生态青蟹、藤壶青蟹、天然青蟹、混饵养殖青蟹和单饵养殖青蟹)，取其螯足肌肉组织测定基本营养成分、氨基酸含量和脂肪酸含量，并通过必需氨基酸指数(EAAI)、支链氨基酸与芳香族氨基酸含量的比值(F)进行分析。结果表明，生态青蟹的蛋白质含量略高于天然青蟹和混饵养殖青蟹；藤壶青蟹的含水率最高，蛋白质含量最低；5种青蟹的粗脂肪和总灰分含量差异均不显著。生态青蟹的总氨基酸含量和必需氨基酸含量均最高，藤壶青蟹的鲜味氨基酸含量最高；藤壶青蟹的EAAI (112.48)和F (2.36)最高，生态青蟹的EAAI (95.35)和F (1.95)分别与天然青蟹的EAAI (96.15)和F (1.90)基本一致；单饵养殖青蟹的EAAI (72.00)和F (1.53)均最低。生态青蟹的单不饱和脂肪酸、多不饱和脂肪酸含量最高，其二十二碳五烯酸+二十二碳六烯酸(EPA+DHA)显著高于天然青蟹，且部分不饱和脂肪酸含量显著高于天然青蟹、混饵养殖青蟹和单饵养殖青蟹。从蛋白质、总氨基酸、必需氨基酸和不饱和脂肪酸的含量来看，生态青蟹的含量最高；从EAAI和F来看，藤壶青蟹的评价最高，说明2种红树林生态修复产出的青蟹品质较好。     

Preparation, Characterization of Solid SolutionLa_4BaCu_(5- x)Mn_xO_(13 λ)(x= 0—5) and ItsCatalytic Activity in the Reduction of NO by CO

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｄｉｓｃｏｖｅｒｙｏｆｔｈｅｓｕｐｅｒｃｏｎｄｕｃｔｉｖｉｔｙｏｆｔｈｅＢａ－Ｌａ－Ｃｕ－Ｏｓｙｓｔｅｍａｔｈｉｇｈｔｅｍｐｅｒａｔｕｒｅｓｈａｓｇｒｅａｔｌｙｓｔｉｍｕｌａｔｅｄｔｈｅｉｎｖｅｓｔｉｇａｔｉｏｎｏｆｃｕｐｒａｔｅｓ［１］．Ｃｕｐｒａｔｅｓｈａｖｅｂｅｅｎｆｏｕｎｄｔｏｂｅａｃｔｉｖｅｃａｔａｌｙｓｔｓｆｏｒｓｅｖｅｒａｌｒｅａｃｔｉｏｎｓ，ｉｎｃｌｕｄｉｎｇｔｈｅｒｅｄｕｃｔｉｏｎａｎｄｄｅｃｏｍｐｏｓｉｔｉｏｎｏｆＮ２Ｏ，ＮＯａｎｄＮＯ２，ｔｈｅ…     

Crystal and Molecular Structure of an Inclusion Complex of p-tert-Butylcalix[6]arene with Toluene

ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｔｈｅｐａｓｔｆｅｗｙｅａｒｓ，ｔｈｅｃａｌｉｘａｒｅｎｅｓｈａｖｅｐａｒｔｉｃｕｌａｒｌｙａｔｒａｃｔｅｄａｔｅｎｔｉｏｎｆｒｏｍｒｅｓｅａｒｃｈｅｒｓｗｈｏｈａｖｅｂｅｅｎｗｏｒｋｉｎｇｏｎｈｏｓｔ－ｇｕｅｓｔｃｏｍｐ...     

茳芏(Cyperus malaccensis Lam.)生物量估测模型

【目的】探讨简单、方便且能准确估算盐沼植物生物量的方法,简化其生物量测定工作。【方法】以高度(H)和密度(D)2个形态因子作为变量,用数理统计方法构建茳芏(Cyperus malaccensis Lam.)生物量估测模型。【结果】茳芏地上生物量(Wa)以DH为变量进行估测更恰当,以DH为自变量的乘幂曲线模型Wa=0.0097(DH)1.177为生物量最佳估测模型。【结论】运用回归模型估算茳芏地上生物量可行,并可取得较为可靠的预测精度,茳芏地下生物量不能得出合适的估算方程。