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Differential scanning calorimetry

About: Differential scanning calorimetry is a research topic. Over the lifetime, 50315 publications have been published within this topic receiving 1152335 citations. The topic is also known as: DSC.


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Journal ArticleDOI
TL;DR: In this paper, a new class of materials has been synthesized, which showed a reversible capacity of and stable cycling, and differential scanning calorimetry studies showed much improved thermal stability of these materials in their totally charged states in contact with electrolyte.
Abstract: A new class of materials has been synthesized. The compound showed a reversible capacity of and stable cycling was demonstrated. Differential scanning calorimetry studies showed much improved thermal stability of these materials in their totally charged states in contact with electrolyte. The exothermic peak at in a charged electrode containing was drastically reduced asx increases in . No exotherm was observed below for in its totally charged state. We believe that the use of these materials will improve the overall safety of batteries. ©1998 The Electrochemical Society

288 citations

Journal ArticleDOI
TL;DR: Differential scanning calorimetry was used to determine the phase transitions of dried and rehumidified amorphous lactose, sucrose, and a mixture of sucrose and Amioca.
Abstract: Differential scanning calorimetry was used to determine the phase transitions of dried and rehumidified amorphous lactose, sucrose, and a mixture of sucrose and Amioca. Glass-transition, crystallization, and melting temperatures decreased with increasing moisture content. The time to crystallization of amorphous lactose held isothermally above the glass-transition temperature decreased as the temperature was increased. Isothermal crystallization time of lactose was a function of the temperature difference between the holding temperature and the glass-transition temperature independently of moisture content. Amorphous biological materials are metastable showing temperature, moisture content, and time-dependent phase transitions that affect their drying behavior, stickiness, storage stability, and quality.

288 citations

Journal ArticleDOI
TL;DR: Aqueous colloidal microgels have been prepared, based on poly(N-isopropylacrylamide)[poly(NIPAM)], cross-linked with bisacryamide, containing 5% w/w acrylic acid (AAc) as a comonomer as discussed by the authors.
Abstract: Aqueous colloidal microgels have been prepared, based on poly(N-isopropylacrylamide)[poly(NIPAM)], cross-linked with bisacrylamide, containing 5% w/w acrylic acid (AAc) as a comonomer. Transmission electron micrographs of the microgels show that the copolymer microgels are monodisperse spheres. The size of the microgel particles containing 5% AAc has been studied, using dynamic light scattering, as a function of pH (3–10), ionic strength (10–4–10–1M NaCl) and temperature (20–75 °C). The hydrodynamic diameter of the copolymer microgels decrease both with increasing ionic strength (at pH 6 and 25 °C) and reversibly with increasing temperature at pH values of 2.6, 3.4 and 6.5. However, under isothermal conditions in 10–3M NaCl at 25 °C, the hydrodynamic diameter increases in going from pH 3.3–9.4. In addition, the temperature-induced conformational changes in the polymer chains have been followed using high-sensitivity differential scanning calorimetry (HSDSC). A comparison is made with the behaviour of poly(NIPAM) microgel particles, not containing AAc. Explanations are offered to account for the pronounced difference in the physico-chemical properties observed.

287 citations

Journal ArticleDOI
TL;DR: In this article, the authors measured the heat of crystallization, ΔHac, to be 11.9±0.7 kJ/mol, substantially less than the value predicted by scaling ΔHAC of a•Ge.
Abstract: Thin layers of amorphous silicon (a‐Si) were produced by noble gas ion implantation of (100) substrates held at 77 K. Rutherford backscattering and channeling, and differential scanning calorimetry were used to measure the heat of crystallization, ΔHac, to be 11.9±0.7 kJ/mol, substantially less than the value predicted by scaling ΔHac of a‐Ge. The crystal growth velocity is found to have the form v=v0 exp(−2.24 eV/kT). We obtain a new estimate, 1420 K, for the melting temperature of a‐Si.

286 citations

Journal ArticleDOI
TL;DR: In this paper, heat-induced aggregation of β-lactoglobulin was investigated as a function of pH, heating temperature and NaCl concentration by measurements of reaction kinetics, differential scanning calorimetry, and light scattering.
Abstract: Heat-induced aggregation of β-lactoglobulin was investigated as a function of pH, heating temperature, and NaCl concentration by measurements of reaction kinetics, differential scanning calorimetry, and light scattering. The aggregation can be well interpreted using a reaction scheme consisting of two steps: a denaturation equilibrium, with a first-order unfolding reaction, followed by second-order aggregation reactions. Denaturation becomes rate limiting at high heating temperature, pH values close to the isoelectric point of the protein, and high NaCl concentration. At neutral pH a maximum is seen in the overall reaction rate as a function of NaCl concentration, which is explained by a stabilizing, salting-out effect of the salt in combination with an increase in the rate of successive aggregation reactions. At high NaCl concentrations physical bonding becomes increasingly important; large aggregates that continue to grow in time are formed, and two phases are distinguished in the aggregation step. The...

286 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20231,992
20224,368
20211,646
20201,696
20191,799
20181,990