Results 191 to 200 of about 3,494,282 (240)

Characterisation of polyethylene glycols using solution calorimetry

International Journal of Pharmaceutics, 1991
Abstract The heats of solution of a range of polyethylene glycols (PEGs) have been measured using samples prepared under various heating and cooling protocols. The values obtained were shown to be highly sensitive to both PEG molecular weight and to the thermal history of the sample.
J M Newton
exaly   +2 more sources

Evaluation of the amorphous content of lactose by solution calorimetry and Raman spectroscopy

Talanta, 2005
Solution calorimetry can be used to determine the amorphous content of a compound when the solubility and dissolution rate of the compound in the chosen solvent are reasonably high.
Kristiina Jarvinen, K Jarvinen
exaly   +2 more sources

The fusion thermochemistry of self-associated aromatic compounds at 298.15 K studied by solution calorimetry

Journal of Chemical Thermodynamics, 2019
© 2019 Elsevier Ltd The solution calorimetry approach for determination of the fusion enthalpy at 298.15 K of aromatic compounds not capable of self-association was extended to those forming intermolecular hydrogen bonds.
Marat Ziganshin, Timur Mukhametzyanov, Mikhail Yagofarov   +2 more
exaly   +1 more source

Novel sample container for solution calorimetry

Review of Scientific Instruments, 1979
A new design for calorimeter sample containers is described. The basic design is a hollow right cylinder with thin, glass membranes covering both ends. The membranes are intended to be broken out completely to release the sample contained within. The membranes are sealed to the container body with silicone rubber.
D L, Raschella, R L, Fellows, J R, Peterson   +2 more
openaire   +2 more sources

Isothermal and solution calorimetry to assess the effect of superplasticizers and mineral admixtures on cement hydration

Journal of Thermal Analysis and Calorimetry, 2011
The heat of hydration evolution of eight paste mixtures of various water to binder ratio and containing various pozzolanic (silica fume, fly ash) and latent hydraulic (granulated blast furnace slag) admixtures have been studied by means of isothermal ...
Nele de Belie
exaly   +2 more sources

Applications of Calorimetry to Nonelectrolyte Solutions

Journal of Chemical & Engineering Data, 1996
This paper describes the application of calorimetry to the measurement of the excess molar enthalpies for binary mixtures of nonelectrolytes. Batch, displacement, and flow calorimeters are described, using as examples the batch calorimeter of McGlashan;, the displacement calorimeters of Van Ness and of Marsh and Stokes, and the flow calorimeters of ...
J. Bevan Ott, Jadwiga T. Sipowska
openaire   +1 more source

Solution calorimetry of nitrosonium salts

Journal of the Chemical Society, Dalton Transactions, 1980
The standard enthalpies of formation of crystalline [NO][ClO4], [NO][HSO4], and [NO]2[S2O7] have been determined as 59.0, –680.3, and –1 041.0 kJ mol–1 respectively, based on enthalpies of reaction with aqueous base. The discrepancies between these and some previously published values are discussed in terms of the competing neutralisation and ...
Arthur Finch, Peter N. Gates, Terence H. Page   +2 more
openaire   +1 more source

Isoperibol Reaction-Solution Calorimetry

2008
The determination of enthalpies of reaction in solution, using isoperibol reaction-solution calorimetry, is often the easiest and most accurate method of determining enthalpies of formation of compounds that cannot be studied by combustion calorimetry.
José A. Martinho Simões, Manuel Minas da Piedade   +1 more
openaire   +1 more source

Calorimetry of model biomolecules in aqueous solution

Thermochimica Acta, 1985
Abstract A survey of the thermodynamic properties of aqueous solutions of model compounds is presented. The review is focused on the analysis of the thermal data obtained from dilution and mixing experiments monitoring weak interactions occurring between solvated solute species.
openaire   +2 more sources

Calorimetry Studies of Chlorpromazine Hydrochloride in Solution

Langmuir, 2000
The self-association of the tranquilizer chlorpromazine hydrochloride in aqueous solution was studied. Using isothermal titration calorimetry, the critical micelle concentration and solvent−micelle interactions were evaluated as a function of temperature, ionic strength, and pH.
Yoshihito David Saito, Shandiz Tehrani, Mariko M. Okamoto, Henry H. Chang, Phoebe Dea   +4 more
openaire   +1 more source