Search results for "ethylenediamine"

showing 10 items of 142 documents

Production and physicochemical characterization of a new amine derivative of gellan gum and rheological study of derived hydrogels

2020

The production of an amine derivative of gellan gum, named GG-EDA, was here obtained by functionalizing the polysaccharide backbone with pendant ethylenediamine moieties. The obtained derivative was characterized by spectroscopic, colorimetric, chromatographic and rheological analyses to study the effect of the free amino groups on the physicochemical properties of the macromolecule. A titration experiment was conducted to study the acid-base dissociation constants in aqueous media for the carboxylic and amino groups in the GG-EDA and to shed light on the possibility that the derivative shows a polyampholyte structure under physiological conditions. The rheological analysis conducted on bot…

Polymers and PlasticsEthylenediamine02 engineering and technology010402 general chemistryPolysaccharide01 natural sciencesBiomedical deviceGellan gumPolyampholyte polymerschemistry.chemical_compoundBiomedical devicesMaterials ChemistryOrganic chemistryAmine derivatized gellan gumchemistry.chemical_classificationOrganic ChemistryHydrogels021001 nanoscience & nanotechnologyGellan gum0104 chemical sciencesHydrogelchemistrySelf-healing hydrogelsAmine gas treatingTitrationPOLYMERS0210 nano-technologyDerivative (chemistry)MacromoleculeCarbohydrate Polymers
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The Efficacy of an Experimental Single Solution versus Alternate Use of Multiple Irrigants on Root Dentin Microhardness

2013

The objective of this work was to use fnite element analysis to compare the effect of forces coming to bear on abutments 4.1 or 5.0 mm in diameter connThis study was carried-out to evaluate and compare the efficacy of various irrigants when used singly or in combination on the microhardness of root canal dentin. Study Design: A total of 50 root-halves were randomly divided into 5 groups immediately after the initial baseline microhardness measurements and treated with: Group-1; 7.5%Ethylenediaminetetraaceticacid (EDTA)+ 2.5%sodium hypochlorite (NaOCl), Group-2; 7.5%ethyleneglycol-bis[b-aminoethylether]-N, N,N0,N0-tetraaceticacid (EGTA)+ 2.5%NaOCl, Group-3; 7.5%trans1,2diaminocyclohexane NNN…

Root canalCdtaEthylenediamineDentistryEthylenediamineOdontologíaRoot dentinIndentation hardnesschemistry.chemical_compoundClinical and Experimental DentistryDentinmedicineGeneral DentistryChemistrybusiness.industryResearchSignificant differenceEDTAEGTA:CIENCIAS MÉDICAS [UNESCO]Ciencias de la saludEGTAmedicine.anatomical_structureSodium hypochloriteUNESCO::CIENCIAS MÉDICASbusinessNuclear chemistry
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Solution chemistry of N,N'-ethylenebis(salicylideneimine) and its copper(II), nickel(II) and iron(III) complexes

1991

Abstract Potentiometric determination of protonation-deprotonation equilibria of the N,N'-ethylenebis(salicylideneimine) (H2sal2en), the related N-(2-aminoethyl)salicylideneimine, (Hsalen), and their organic fragments, salicylaldehyde (Hsal) and ethylenediamine (en), has been used to study the equilibria involved in the formation of Schiff bases from Hsal, sal− and en and in their complex formation with copper(II), nickel(II) and iron(III) ions in dimethyl sulfoxide (dmso)-water (80:20 wt./wt.) mixture (25 °C and 0.1 mol dm−3 KClO4 ionic strength): en+Hsal⇔Hsalen; en+2Hsal⇔H2sal2en; en+ sal−⇔salen−; en+2sal−⇔sal2en2−; sal−+en+MN+⇔[M(salen)](n−1)+; 2sal−+en+Mn+⇔ [M(sal2en)](n−2)+. In these t…

Schiff baseLigandInorganic chemistrychemistry.chemical_elementEthylenediamineProtonationMedicinal chemistryCopperInorganic Chemistrychemistry.chemical_compoundNickelchemistrySalicylaldehydeMaterials ChemistryChelationPhysical and Theoretical ChemistryInorganica Chimica Acta
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Nanostructural changes in dentine caused by endodontic irrigants

2013

Objective: To study nanostructural dentinal changes produced by endodontic irrigants. Study Design: Experimental study. Nanoindentations were performed on peritubular (PD) and intertubular dentine (ID) with an atomic force microscopy. Stiffness and adhesion force were determined before and after application of 5.25% sodium hypochlorite (NaOCl) and 17% ethylenediaminetetraacetic acid (EDTA). Normalized differences before and after treatment for stiffness and adhesion forces were calculated. A paired T-test was used to compare stiffnes and adhesion force before and after irrigants application. Results: After treatment with EDTA there was a 29.80% reduction in stiffness in ID and a 63.53% redu…

Sodium HypochloriteDentistryOdontologíaEthylenediaminetetraacetic acidIn Vitro TechniquesEndodonticschemistry.chemical_compoundstomatognathic systemmedicineDentinAdhesion forceHumansGeneral DentistryEdetic AcidRoot Canal IrrigantsAtomic force microscopyChemistrybusiness.industryStiffnessAdhesion:CIENCIAS MÉDICAS [UNESCO]Ciencias de la saludmedicine.anatomical_structureOtorhinolaryngologySodium hypochloriteUNESCO::CIENCIAS MÉDICASDentinSurgeryResearch-Articlemedicine.symptombusinessAfter treatmentMedicina Oral, Patología Oral y Cirugía Bucal
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CCDC 178510: Experimental Crystal Structure Determination

2003

Related Article: B.Macias, M.V.Villa, E.Chicote, S.Martin-Velasco, A.Castineiras, J.Borras|2002|Polyhedron|21|1899|doi:10.1016/S0277-5387(02)01098-7

Space GroupCrystallography(Ethylenediamine)-(ethanol)-triaqua-copper(ii) bis(proline-dithiocarbamato)-copper(ii)Crystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 224277: Experimental Crystal Structure Determination

2004

Related Article: J.Vicente, J.-A.Abad, R.Clemente, J.Lopez-Serrano, M.C.Ramirez de Arellano, P.G.Jones, D.Bautista|2003|Organometallics|22|4248|doi:10.1021/om0303552

Space GroupCrystallography(NNN'N'-tetramethylethylenediamine)-(2-(p-tolylimino(diphenyl)phosphino)phenyl)-palladium(ii) perchlorateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 207942: Experimental Crystal Structure Determination

2003

Related Article: J.Terrematte, S.Daniele, L.G.Hubert-Pfalzgraf, J.M.Decams, H.Guillon, P.Richard|2003|Inorg.Chem.Commun.|6|1039|doi:10.1016/S1387-7003(03)00160-6

Space GroupCrystallography(mu~2~-NNN'N'-Tetramethylethylenediamine-NN')-hexakis(2266-tetramethyl-35-heptanedionato-OO')-di-yttriumCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 821788: Experimental Crystal Structure Determination

2011

Related Article: M.Risto, T.Chivers, J.Konu|2011|Dalton Trans.|40|8238|doi:10.1039/c1dt10646e

Space GroupCrystallographyCrystal System(bis(diphenylphosphorothioyl)methanidethiolato)-chloro-(NNN'N'-tetramethylethylenediamine)-indium(iii)Crystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 263310: Experimental Crystal Structure Determination

2006

Related Article: N.Ortega-Villar, A.L.Thompson, M.C.Munoz, V.M.Ugalde-Saldivar, A.E.Goeta, R.Moreno-Esparza, J.A.Real|2005|Chem.-Eur.J.|11|5721|doi:10.1002/chem.200500171

Space GroupCrystallographyCrystal SystemCrystal Structure(N-Benzyl-NN'N'-tris(2-pyridylmethyl)ethylenediamine)-(dicyanamide-N)-iron(ii) hexafluorophosphate methanol solvateCell ParametersExperimental 3D Coordinates
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CCDC 263315: Experimental Crystal Structure Determination

2006

Related Article: N.Ortega-Villar, A.L.Thompson, M.C.Munoz, V.M.Ugalde-Saldivar, A.E.Goeta, R.Moreno-Esparza, J.A.Real|2005|Chem.-Eur.J.|11|5721|doi:10.1002/chem.200500171

Space GroupCrystallographyCrystal SystemCrystal Structure(mu~2~-Dicyanamide-NN'')-bis(N-benzyl-NN'N'-tris(2-pyridylmethyl)ethylenediamine)-di-iron(ii) tris(hexafluorophosphate)Cell ParametersExperimental 3D Coordinates
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