Search results for "Activation method"

showing 3 items of 3 documents

Temperature changes in 2% chlorhexidine gluconate using two activation methods with different intensity levels

2018

Background Chlorhexidine is an irrigant solution widely used in root canal treatment because of its good antimicrobial properties. However, its mixture with sodium hypochlorite results in the appearance of substance called p-chloroaniline, a cytotoxic substance. This is also found when chlorhexidine is heated. The use of passive ultrasonic irrigation is related to an irrigant thermal increase, which can cause the appearance of p-chloroaniline. Thus, the objective is to establish the influence of ultrasonic and sonic activation, with the use of different intensities, upon the temperature of chlorhexidine gluconate (CHX). Material and methods The following groups were established: control (wi…

0301 basic medicineRoot canalResearchChlorhexidine030206 dentistry:CIENCIAS MÉDICAS [UNESCO]Intensity (physics)Operative Dentistry and Endodontics03 medical and health scienceschemistry.chemical_compound030104 developmental biology0302 clinical medicinemedicine.anatomical_structureVolume (thermodynamics)chemistrySodium hypochloriteChlorhexidine gluconateUNESCO::CIENCIAS MÉDICASmedicineUltrasonic sensorActivation methodGeneral DentistryBiomedical engineeringmedicine.drug
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Neutron yield from carbon, light- and heavy-water thick targets irradiated by 40MeV deuterons

2009

Abstract Angular and energy distributions of neutrons produced by the interaction of deuterons of 40 MeV in carbon, light- and heavy-water targets, in which they are stopped, have been measured by the activation method. A discrepancy with a time-of-flight measurement for d + C has been found. The results are compared with a Monte-Carlo calculation and are discussed in the frame of building a deuteron-to-neutron converter for the SPIRAL2 radioactive ion-beam facility.

Nuclear and High Energy PhysicsNuclear TheoryActivationchemistry.chemical_element[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciencesNuclear physicschemistry.chemical_compoundNeutron yield0103 physical sciencesThick target neutronyieldMonte-Carlo codeNeutronIrradiationNuclear Experiment010306 general physicsInstrumentationHeavy waterPhysics010308 nuclear & particles physicschemistryDeuteriumMonte carlo codePhysics::Accelerator PhysicsActivation methodCarbonNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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Synthesis of peptides with α,β‐dehydroamino acids, V. coupling experiments with C‐terminal dehydrophenylalanine and dehydroalanine residues

1986

N-Protected model dipeptides of C-terminal (Z)-ΔPhe and ΔAla couple with glycine esters after activation with either diphenyl phosphorazidate (DPPA), N-cyclohexyl-N′-[2-(N-methylmorpholinio)ethyl]carbodiimide p-toluenesulfonate (WSC), N,N′-dicyclohexylcarbodiimide + 1-hydroxybenzotriazole (DCC + HOBt), or the mixed anhydride (MA) with isobutyl chlorocarbonate to give in good or mostly moderate yields the (Z)-ΔPhe-containing tripeptides 1 – 9 and ΔAla-containing tripeptides 11 – 19, respectively. In the MA and DPPA methods, further acylation products 20a – d are formed to a great extent, expecially during the ΔAla peptide syntheses. (E)-TFA-Gly-ΔPhe and Gly-OtBu, irrespective of the activati…

chemistry.chemical_classificationDouble bondStereochemistryChemistryOrganic ChemistryPeptideTripeptideAdductAcylationchemistry.chemical_compoundDehydroalaninePhysical and Theoretical ChemistryActivation methodCarbodiimideLiebigs Annalen der Chemie
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