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Journal of Thermal Analysis and Calorimetry
Authors: Bedřich Smetana, Simona Zlá, Aleš Kroupa, Monika Žaludová, Jaromír Drápala, Rostislav Burkovič, and Daniel Petlák

DTA heating curves obtained during three repeated DTA runs, alloy A12 Phase transition temperatures obtained at cooling process are significantly shifted to lower values. The nucleation problem is the reason

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The melting and crystallization behaviour of water restrained in polysulfone (PSF) hollow fibre has been investigated by DSC. The PSF hollow fibre was prepared by wet spinning. The morphology of the fibre was observed by scanning electron microscopy. The amount of water was varied by successive evaporation and it was observed that melting and crystallization shifted to temperatures lower than those observed for free water. DSC and NMR studies showed that water in hollow fibres is in a restricted state.

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The phase transition from the solid state to the liquid crystal state was investigated for the copper(II) salts of the fatty acids with 10, 12, 14, 16 or 18 carbon atoms in the chain, by measuring the temperature dependence of the conductance and capacitance of a cell containing the material under investigation. The temperatures deduced from these dependences agree reasonably with those found by DSC measurements and with those to be found in the literature. Differences in dielectric behaviour between the samples are qualitatively discussed.

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The nature of the β to α phase transition in silver iodide was investigated by conventional and modulated temperature DSC and dielectric property measurements. On cooling, the high temperature phase remained stable 2.5C below its normal transition temperature even at a very slow cooling rate 0.2C h–1. Dielectric property measurements under conventional and microwave heating suggested an anomalous effect of the latter on the β to α phase transition in this material.

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Journal of Thermal Analysis and Calorimetry
Authors: Ljubiša Balanović, Dragan Manasijević, Dragana Živković, Aleksandra Mitovski, Nadežda Talijan, Duško Minić, and Živan Živković

diagrams (CALPHAD) approach and the phase transition temperatures of the Al–Ge–Zn ternary system were measured using DTA. Experimental results from this study and literature were compared with the predicted phase diagram of the Al–Ge–Zn ternary system

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this study, 1 H NMR technique is described that can be used to estimate the phase transition temperature ( T c ) of phospholipid. Figure 1 shows the high-resolution 1 H NMR spectra of liposome obtained from: (a) DPPC; (b) DPPC/5-FU; (c) DPPC

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To investigate the nm-size dependence of structural and thermal properties for AgI, the formation of composites between AgI and porous silica with controlled pore diameters of 10, 15, 30, and 50 nm was examined. The introduction of AgI within the micropores of the porous silica was performed successfully by a salt-bridge precipitation method with using AgNO3 and KI aqueous solutions. The AgI formed within the micropores was identified to be β/γ-AgI, independent of the pore size of 10-50 nm, by powder X-ray diffractometry. In differential scanning calorimetry, the composites showed thermal anomaly at around 150C on heating due to the phase transition from β/γ -AgI to α -AgI as in the case of bulk crystalline AgI (T trs=147C). However, the transition temperature from α-AgI to β/γ -AgI on cooling decreased remarkably with the decrease of the pore size from 50 to 10 nm. The result indicates the possibility for AgI particles with diameter less than 10 nm to exist as α -AgI even below 100C.

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). The phase transition temperatures are in good agreement with the published data [ 24 , 25 ]. Compared with other liposomes, pure DPPC liposomes own the highest main transition temperature and its transition peak is the narrowest (the HHW equal to 0

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phase transition temperature ( T g )” for the polymeric blend samples. The phase transition temperature ( T g ) is a temperature boundary almost for all amorphous polymers (and many crystalline polymers) above which the substance remains soft, flexible

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glasses was assessed based on three standard criteria, whose values were determined from the experimentally obtained characteristic temperatures on the DSC curves. The shift of the phase transition temperature as a function of bismuth content was discussed

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