Authors:Dragana Živković, Aleksandra Mitovski, Ljubiša Balanović, Dragan Manasijević, and Živan Živković
Terpilowski et al. [ 9 ] and Cakir et al. [ 10 ], while Kleppa [ 11 ], Wittig et al. [ 12 ], and Yazawa et al. [ 13 ] expolored them using direct reaction calorimetry, and newest reference by Brunetti et al. [ 14 ]. Optimal thermodynamic activities for indium
Authors:Werner Hässelbarth, Jürgen Rauch, and Stefan M. Sarge
Among all these measurements and uncertainty budgets, that of the adiabatic temperature rise stands out as being specific to this type of calorimetry and applicable to other measurements in this field. Therefore, a separate publication was decided. The
Authors:F. Langmaier, M. Mládek, K. Kolomaznik, J. Šívarová, and S. Sukop
Hydrolysates from chromed leather waste obtained in powdered form on an industrial scale by using biotechnical methods were
analysed by TG an DSC techniques. Besides about 9% (mass/mass) of moisture, around 1% (mass/mass) of cyclohexylamine was found
in the pulverized hydrolysates. Calorimetric measurement of the reaction heats of the reactions of the hydrolysates with commercially
available aldehydes indicates that their reactivity decreases in the sequenceglutardialdehyde>>methylglyoxal≈acetaldehyde>>glyoxal>formaldehyde.
The Modulated Differential Calorimetry (MDSC) is applied to the determination of the reversibility in the cholesteryl chloride, which presents a cholesteric monotropic phase between the isotropic and crystalline states. The experimental modulation parameters that govern this method i.e. frequency, amplitude and heating/cooling rate, are determined. MDSC curves and complementary thermomicroscopical observations assign melting, crystallization and liquid cholesteric transition as ‘non reversing’, and clarification as ‘reversing’.
Authors:D. Hourston, M. Song, H. Pollock, and A. Hammiche
Modulated-temperature differential scanning calorimetry was used to measure the glass transition temperature,Tg, the heat capacity relaxation in the glassy state and the increment of heat capacity, δCp, in the glass transition region for several polymers. The differential of heat capacity with respect to temperature was used
to analyseTg and δCp simply and accurately. These measurements are not affected by complex thermal histories.
Differential scanning calorimetry (DSC) is extensively used in chemistry and physics to analyze, e.g. phase transitions of different compounds [ 1 , 2 ]. Recently this technique has been used with increasing
Authors:Paul-Antoine Santoni, Frédéric Morandini, and Toussaint Barboni
The aim of this study is to investigate fireline intensity at the laboratory scale by means of oxygen consumption (OC) calorimetry and to test Byram’s formulation. Effective heat of combustion and combustion
Authors:A. Samuni, D. Crommelin, N. Zuidam, and Y. Barenholz
This study was aimed to investigate the physicochemical changes induced in 200 nm extruded oligolamellar DPPC:DPPG (10:1)
liposomes by freezing, followed by γ-irradiation, in the absence and presence of 5 mM stable cyclic nitroxide radicals, 2,2,6,6-tetramethylpiperidine-1-oxyl
(Tempo) and 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl (Tempol). The characterization is based on the use of differential
scanning calorimetry (DSC) and was aimed to differentiate the contribution of freezing and γ-irradiation in the presence and
absence of nitroxides. Liposomal preparations of DPPC/DPPG which have sub-, pre- and main-phase transitions in the temperature
range (0�C<Tm<50�C) were used.
Our results show that: (1) freezing modified and induced fusion to MLV as well as fission to SUV, (2) freezing did not fully
prevent the radiation-induced changes in the thermotropic characteristics of the liposomes, and (3) Tempo and Tempol did not
prevent the changes in thermotropic behavior caused as a result of freezing of the liposomal dispersion. These results demonstrate
that DSC is a powerful and sensitive tool in both physical and chemical studies of lipid assemblies.
Authors:M. Eugenia Sesto Cabral and E. Elizabeth Sigstad
that 1 °C increase in temperature between 20 and 25 °C produces 7% increase in respiration rate.
Calorimetry could be a suitable technique to measure CO 2 evolution from glucose amended soils. A method was developed to measure CO 2 evolution