citric acid

沃森,克里克的杰作

A Structure for Deoxyribose Nucleic Acid

J. D. Watson and F. H. C. Crick(1)

April 25, 1953 (2), Nature (3), 171, 737-738

We wish to suggest a structure for the salt of deoxyribose nucleic acid (D.N.A.). This structure has novel features which are of considerable biological interest.

A structure for nucleic acid has already been proposed by Pauling (4) and Corey1. They kindly made their manuscript available to us in advance of publication. Their model consists of three intertwined chains, with the phosphates near the fi

沃森,克里克的杰作

A Structure for Deoxyribose Nucleic Acid

J. D. Watson and F. H. C. Crick(1)

April 25, 1953 (2), Nature (3), 171, 737-738

We wish to suggest a structure for the salt of deoxyribose nucleic acid (D.N.A.). This structure has novel features which are of considerable biological interest.

A structure for nucleic acid has already been proposed by Pauling (4) and Corey1. They kindly made their manuscript available to us in advance of publication. Their model consists of three intertwined chains, with the phosphates near the fi

Rechargeable Sealed Lead Acid Battery

The details:

1. Rechargeable Sealed Lead Acid Battery Features:

1. Fully sealed: with cover and pole double sealed design to prevent leakage of electrolysis and the reliability of safe-valve prevent oxygen and dust from outside enter into the battery

2. Free maintenance: with the performance of water reproduce and high sealed reaction efficiency, it no needs any compensation of acid and water during use

3. Safety: without acid leaked, reliable gas pressure venting system and equipped with a

反应精馏

3612Ind.Eng.Chem.Res.2003,42,3612-3619

SEPARATIONS

EsterificationofaFattyAcidbyReactiveDistillation

SvenSteinigewegandJu1rgenGmehling*

CarlvonOssietzkyUniversityofOldenburg,IndustrialChemistry,P.O.Box2503,D-26111Oldenburg,Germany

Areactivedistillationprocessfortheproductionofdecanoicacidmethylestersbyesterificationofthefattyaciddecanoicacidwithmethanolispresented.Thereactionhasbeencatalyzedheterogeneouslybyastrongacidicion-exchangeresin(Amberlyst15).ApragmatickineticmodelbasedonaLangmuir-Hinshelwood-Hougen-Watsonapproachhasb

Aromastoffe aus dem siurekatalysierten Abbau von CitralPeter Schieberle, Herbert Ehrmeier und Werner GroschDeutsche Forschungsanstalt fiir Lebensmittelchemie und Kurt-Hess-Institut fiir Mehl- und EiweiBforschung, Lichtenbergstrasse 4, D-8046 Garching, Bundesrepublik DeutschlandAroma compounds resulting from the acid catalysed breakdown of citral Summary. The aroma compounds of an emulsion of citral (a mixture of geranial and neral) stored for 4 days at 40 °C in an aqueous 5% citric acid solution (pH 1.8), were analysed

Solubilityofgallicacidinliquidmixturesof(ethanol+water)from(293.15to318.15)K

AdelNoubigha, ,Chokrijeribia,ArbiMgaidib,ManefAbderrabbaa

ab

LaboratoryofPhysicalChemistryofMaterials,PreparatoryInstituteforScienti candTechnicalStudiesofLaMarsa,CarthageUniversity,Bp51,2070LaMarsa,TunisiaIndustrialInorganicChemistryLaboratory,ChemistryDepartment,FacultyofScienceofTunis,TunisElManarUniversity,1060Tunis,Tunisia

articleinfoabstract

Thesolubilityofgallicacidin(water+ethanol)binarysolventswasdeterminedfrom(293.15to318.15)Katatmosphericpres

Solubilityofgallicacidinliquidmixturesof(ethanol+water)from(293.15to318.15)K

AdelNoubigha, ,Chokrijeribia,ArbiMgaidib,ManefAbderrabbaa

ab

LaboratoryofPhysicalChemistryofMaterials,PreparatoryInstituteforScienti candTechnicalStudiesofLaMarsa,CarthageUniversity,Bp51,2070LaMarsa,TunisiaIndustrialInorganicChemistryLaboratory,ChemistryDepartment,FacultyofScienceofTunis,TunisElManarUniversity,1060Tunis,Tunisia

articleinfoabstract

Thesolubilityofgallicacidin(water+ethanol)binarysolventswasdeterminedfrom(293.15to318.15)Katatmosphericpres