Calorimetry studies

Luan CH, Harris RD, Prasad KU et al (1990) Differential scanning calorimetry studies of the inverse temperature transition of the polypentapeptide of elastin and its analogs. Biopolymers 29 1699-1706... 

Sujak, A., K. Strzalka, and W.I. Gruszecki. 2007b. Thermotropic phase behaviour of lipid bilayers containing carotenoid pigment canthaxanthin A differential scanning calorimetry study. Chem. Phys. Lipids 145 1-12. 

The American Society for Testing and Materials (ASTM) is a not-for-profit organization that provides a forum for the development and publication of voluntary consensus standards for materials, products, systems, and services.67 One ASTM committee (E27) develops standardized physical and chemical test methods on the hazard potential of chemicals, including but not limited to reactive hazards. The committee has developed standard analytical methods for calorimetry studies in addition to a standard guide for determining binary chemical compatibility (ASTM, 2000). 

Figure 11.4 Results of a hypothetical titration calorimetry study of the reaction A(aq) + B(aq) AB(aq), showing the dependence of the curve shape on the values (a) of the equilibrium constant for ArH° — 100 kj mol-1, and (b) of the enthalpy of reaction, for Kc = 100 (see text).

Figure 11.5 Typical curve for a continuous titration calorimetry study of an exothermic reaction, using the calorimeter of Figure 11.1 in the heat flow isothermal mode of measurement./ is the frequency of the constant energy pulses supplied to the heater C in Figure 11.1 b. Adapted from [196,197],...

Table 11.1 Results of the titration calorimetry study of reactions 11.32 and 11.33 at 298.15 Kand ionic strength / = 0.1 M (NaCIC>4). Data from [225],...

J. A. Westrick, J. L. Goodman, K. S. Peters. A Time-Resolved Photoacoustic Calorimetry Study of the Dynamics of Enthalpy and Volume Changes Produced in the Photodissociation of Carbon Monoxide from Sperm Whale Carboxymyoglobin. Biochemistry 1987, 26, 8313-8318. 

VS. Muralha, R. M. Borges dos Santos, J. A. Martinho Simoes. Energetics of Alkyl-benzyl Radicals A Time-Resolved Photoacoustic Calorimetry Study. J. Phys. Chem. A 2004,108, 936-942. 

Tananuwong, K. and Reid, D. S. (2004). Differential scanning calorimetry study of glass transition in frozen starch gels. J. Agric. Food Chem. 52, 4308-4317. 

The relative bond enthalpies from the photoacoustic calorimetry studies can be placed on an absolute scale by assuming that the value for D//(Et3Si—H) is similar to D/f(Me3Si—H). In Table 2.2 we have converted the D/frei values to absolute T>H values (third column). On the basis of thermodynamic data, an approximate value of D//(Me3SiSiMc2—H) = 378 kJ/mol can be calculated that it is identical to that in Table 2.2 [1]. A recent advancement of photoacoustic calorimetry provides the solvent correction factor for a particular solvent and allows the revision of bond dissociation enthalpies and conversion to an absolute scale, by taking into consideration reaction volume effects and heat of solvation [8]. In the last colunm of Table 2.2 these values are reported and it is gratifying to see the similarities of the two sets of data. 

It has been reported that the y-form, which melts at approximately 101°C, is the thermodynamically most stable form at room temperature and that the sorbitol system is monotropic [8]. Studies of the various forms show that upon standing or upon stress conditions, sorbitol will convert to the y-form [7]. However, a solution calorimetry study performed on selected crystal forms of sorbitol reports that sorbitol hydrate is the most stable form followed by the y-form [18]. 

McClements, D.J. (2000). Isothermal titration calorimetry study of pectin-ionic surfactant interactions. Journal of Agricultural andFood Chemistry, 48, 5604-5611. 

Wangsakan, A., Chinachoti, P., McClements, D.J. (2003). Effect of different dextrose equivalent of maltodextrin on the interactions with anionic surfactant in an isothermal titration calorimetry study. Journal of Agricultural and Food Chemistry, 51, 7810— 7814. 

The kinetic results of the differential scanning calorimetry studies on the monomers in Table 3 are presented in Tables 4 and 5. The reaction order n with the exception of example 78a in Table 3 was approximately unity for all of the... 

Calorimetry studies of the reaction of hydrazine with 6 reveal a strong exotherm at temperatures above 85 °C. 

Morgan, R. J., Walkup, C. M., Hoheisel, T. H. Differential Scanning Calorimetry Studies of the Cure of Carbon Fiber-Epoxy Composite Prepregs, J. Appl. Polym. Sci., 30, 289 (1985)... 

G. Krien, Thermal Decomposition of Tetrazene , SympChemProblConnectedStab-Expls (Proc) 1976, A, 371-76 (1977) CA 87, 203825 (1977) [The author reports a differential scanning calorimetry study on the decompn kinetics of Tetrazene. It was found that no simple set of kinetic eqtns can describe the thermal decompn of the compd. He concludes that the reason for the stability of Tetrazene at RT. in contrast to its instability at elevated temps, is its very high activation energy]... 

In the course of calorimetry study of hydrolysis ofTi(OR)4, at different concentrations and h ratios the values of enthalpies of hydrolysis reaction were measured (-AHJ at 298.15K as 14.2, 64.9, 19.3 kJ/mol for R = Et, Pr, Bun respectively [660], These values grow linearly at the first stage when h increases from 0 to 1 and practically do not undergo any changes with further introduction of water. Therefore, the first step of hydrolysis should be regarded as reaction with stoichiometry of h = 1 ... 

Talsma, H., van Steenbergen, M.J., Salemink, P.J.M, Crommelin, D.J.A. The cryopreservation of liposomes. 1. A differential scanning calorimetry study of the thermal behavior of a liposome dispersion containing mannitol during freezing/thawing. Pharm. Res. 8, 1021-1026,1991... 

K. Seefeldt, J. Miller, F. Alvarez-Nunez, N. Rodriguez-Hornedo, Crystallization pathways and kinetics of carbamazepine-nicotinamide cocrystals from the amorphous state by in situ thermomicroscopy, spectroscopy, and calorimetry studies, J. Pharm. Sci. 96 (2007) 1147-1158. 

Thermally induced permeability enhancement of the more lipophilic solutes (butanol, octanol and hydrocortisone) through hairless mouse stratum corneum occurred in the temperature range also associated with lipid transitions in the calorimetry studies. Therefore, it seems likely enhanced permeabilities and lipid mobility within the stratum corneum are correlated. However, these macroscopic studies are unable to provide more specific information concerning the molecular origins of the thermal transitions. The studies provide even less information concerning possible irreversible alterations of the keratinized protein components of the stratum corneum. 

Price, D., Bullett, K. J., Cunliffe, L. K., Hull, T. R., Milnes, G. J., Ebdon, J. R., Hunt, B. J., and Joseph, P., Cone calorimetry studies of polymer systems flame retarded by chemically bonded phosphorus, Polym. Degrad. Stab., 2005, 88, 74—79. 

Liu, H., and Lelievre, J. (1992). A differential scanning calorimetry study of melting transitions in aqueous suspensions containing blends of wheat and rice starch. Carbohydr. Polym. 17 145-149. 

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