Results 261 to 270 of about 61,606 (285)

Thermal Decomposition and Solution Calorimetry of Ammonium Samarium Bromides.

ChemInform, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Oppermann, H., Hennig, C.
openaire   +2 more sources

Characterisation of polyethylene glycol solid dispersions using differential scanning calorimetry and solution calorimetry

International Journal of Pharmaceutics, 1991
Abstract Solid dispersions of nortriptyline HCl in a range of molecular weight PEG samples were manufactured using a low temperature fusion method, whereby the drug remained intact within the dispersion. The phase diagrams obtained using differential scanning calorimetry were monotectic in nature, suggesting that these diagrams represent systems ...
D.Q.M. Craig, J.M. Newton
openaire   +1 more source

Polymorphic status of sorbitol: solution calorimetry versus DSC

Thermochimica Acta, 1993
Abstract The knowledge of the polymorphic status of sorbitol (C6H14O6: D-glucitol, a sugar substitute) is very important for its use in industrial processes. To investigate this problem we have used differential scanning calorimetry (DSC). The derived enthalpies of fusion of three different sorbitol modifications show noticeable deviations from ...
H.K. Cammenga, I.D. Steppuhn
openaire   +1 more source

Heat exchange calorimetry for estimating heats of solution

Thermochimica Acta, 1985
Abstract A simplified calorimeter has been developed for estimating heats of solution by means of heat exchange calorimetry which was originally proposed by the authors. An analog operational technique is preferred for analyses of thermal phenomena observed in the sample vessel.
Shuko Fujieda, Masaki Nakanishi
openaire   +1 more source

Oxide melt solution calorimetry of rare earth oxides

Journal of Thermal Analysis and Calorimetry, 2002
Key to the evaluation of the long-term durability and reactivity of REE-materials is the accurate determination of their thermodynamic properties. High-temperature oxide melt solution calorimetry offers an effective methodology for the determination of enthalpies of formation for REE-materials.
K. B. Helean, A. Navrotsky
openaire   +1 more source

Calorimetry—an important tool in solution chemistry

Thermochimica Acta, 2004
Abstract Calorimetry belongs to the most important experimental techniques. It is the only experimental method allowing for direct measurements of various physical and chemical processes and reactions. When appropriate model is used, analysis of results on molecular level is possible.
openaire   +1 more source

Differential Calorimetry of Thermally Induced Processes in Solution

Review of Scientific Instruments, 1967
An apparatus for the differential thermal analysis of small (1.7 ml) samples of solutions is described. A heat effect amounting to 50 cal per liter of solution taking place over a 30° temperature interval can be measured with a precision of 5%, and a change in heat capacity of the solution amounting to 2 cal deg−1 per liter of solution can be measured ...
Raymond Danforth, Henry Krakauer, Julian M. Sturtevant   +2 more
openaire   +1 more source

Determination of Amorphous Content of Lactose Samples by Solution Calorimetry

Drug Development and Industrial Pharmacy, 2004
Earlies studies suggest that solution calorimetry can be used to determine the extent of amorphous content of drug and excipient, when the solubility and dissolution rate of the compound in the chosen solvent are reasonably high. In the present study, the use of solution calorimetry for assessment of amorphous content of a sample that is not completely
Päivi, Harjunen, Vesa-Pekka, Lehto, Mikko, Koivisto, Elina, Levonen, Petteri, Paronen, Kristiina, Järvinen   +5 more
openaire   +2 more sources

Temperature and power measurements in precision solution calorimetry

Journal of Chemical Education, 1961
Presents the design of a calorimetric apparatus, and accompanying circuit schematic, and their application to calorimetry measurements.
William F. O'Hara, Ching-Hsien Wu, Loren G. Hepler   +2 more
openaire   +1 more source

Differential Scanning Calorimetry Applications to Protein Solutions

1984
This report surveys the recent advances in differential scanning calorimetry as applied to the thermodynamic study of protein solutions.
openaire   +1 more source