Showing papers in "Thermochimica Acta in 1985"

TL;DR: The thermal stability of bovine whey proteins; β-lactoglobulin (β-1g), α-la and serum albumin (BSA) was studied individually and in mixtures in the temperature range 25 −140°C by differential scanning calorimetry.

TL;DR: In this paper, an AC calorimeter technique operating at very low frequencies has been developed for the study of second-order phase transitions, where only a small amount of sample is required (50 to 100 mg), such as insulator crystals, fluids and liquid crystals, can be investigated at I atm and at pressures up to ∼3000 bar.

TL;DR: In this article, the melting properties of rare earth trifluorides have been studied by differential thermal analysis, where modified sample holders were used to increase the sensitivity of temperature measurements.

TL;DR: In this article, a high-strength Type 1 cement produced from raw taconite and copper-nickel tailings of Minnesota is the subject of hydration studies by using thermal methods such as TGA and DTA.

TL;DR: The thermal decomposition of crystalline and gelatinous aluminium hydroxides to alumina has been investigated by thermogravimetry, differential thermal analysis, x-ray diffraction study and infrared spectrophotometry as mentioned in this paper.

TL;DR: The thermal conductivity of solid samples can be measured with DSC by melting experiments with a pure metal (indium or gallium) on top of cylindrical pellets as discussed by the authors.

TL;DR: In this paper, the design and construction of small sample adiabatic calorimeters are discussed and solutions to them are discussed, with illustrative examples of data obtained with them.

TL;DR: The heat capacity of [Fe(2pic)3]Cl2·C2H5OH Crystal (2-pic: 2-picolylamine) has been measured with an adiabatic calorimeter between 13 and 315 K as mentioned in this paper.

TL;DR: In this paper, the DISC (differential, isoperibol, scanning calorimeter) is described for low-temperature calorimetric measurements in the temperature range 4 K T.

TL;DR: In this paper, the kinetics of thermal decomposition and combustion of bagasse were investigated by thermal analysis and gas-solid chromatography in the temperature range of 20-600°C.

TL;DR: The thermal decomposition of these compounds was monitored by DTA and TG, and the resulting products have been studied by X-ray and IR techniques as discussed by the authors, showing that ammonium dawsonite and lithium hydrotalcite are less stable.

TL;DR: In this paper, the phase diagram of the binary system NaNO3KNO3 has been studied by differential scanning calorimetry (DSC) and the liquidus curve has its minimum at 494 K and 50 mol% KNO3 with a very flat solidus curve.

TL;DR: In this paper, enthalpy increment measurements have been carried out on BaZrO 3 and SrZRO 3 in the temperature range 1030-1700 K using a high-temperature differential calorimeter.

TL;DR: In this paper, an improved analytical technique for calculating the kinetic parameters from lignin pyrolysis data was used to investigate the kinetics of pyrolysin pyroglysis.

TL;DR: In this article, a new type of flow microcalorimeter for measuring heat capacities at constant pressure of liquids and solutions was constructed, which is similar in design to Picker's except for the flow system, which consists of two syringe type of pumps and two flowing paths in each flow cell.

TL;DR: In this paper, the role of interfaces in reactions involving solids is discussed, and it is emphasized that the isothermal kinetic characteristics of such reactions are often determined by the progressive changes of interface geometry as reaction advances, and obedience to a particular rate equation does not necessarily provide information concerning the chemistry of the processes involved.

TL;DR: In this article, it has been shown that the Arrhenius equation adequately describes the temperature dependence of the overall degradation rate constant for cellulose and wood pyrolysis.

TL;DR: In this article, the non-isothermal crystallization kinetics of ZrF4BaF2 and ZrFs4-BaF3 glasses were studied on the basis of the method for determining the activation energy for crystal growth from DSC curves of various heating rates.

TL;DR: In this article, the effects of the inorganic matrix of the oil shale on the oxidation of the kerogen at temperatures up to 1000°C in an air atmosphere were investigated.

TL;DR: In this paper, the most important problems encountered in the statistical treatment of dense, complex molecular fluids are indicated, and a brief summary of recent experimental work on thermodynamic excess properties of liquid mixtures of type (Y + an n-alkane).

TL;DR: In this paper, the most promising applications of thermal methods are found in process development: enthalpimetric process investigation on the bench scale, and applications to a pressure reaction, to a highly unstable radical reaction and to fermentations are shown.

TL;DR: In this paper, the effect of various factors involved in a kaolinite dehydroxylation reaction was studied using isothermal TG measurements, and the results showed that the activation energy increased with increasing partial water pressure in the reaction environment and increasing of structural disorder.

TL;DR: In this paper, energy changes occurring during adsorption in gas-solid and solution-solid systems are considered in connection with measurement of the enthalpies, and experimental apparatuses allowing determination both of heat evolved and adsorbed amounts are described, with special regard to those using heat-flow microcalorimeters.

TL;DR: In this paper, the authors used the weighted least-squares method with the equation g(α) = kt + b and using criteria based on the minimization of the difference between α exp and α calc.

TL;DR: In this paper, wood and wood residues derived from liquefaction of Populus tremuloides were studied by means of TG/DTG in order to establish a simple and rapid method to determine the major constituents.

TL;DR: In this article, an easy-install combination between a thermoanalytical and spectroscopical method aiming at the quantification and identification of the thermal decomposition products is demonstrated for an epoxy resin sample.

TL;DR: In this paper, the thermal decomposition of rice husk and that treated with HCl and H2SO4 of various concentrations were carried out by TG, DTG and DTA.