Differential scanning calorimetry components

Teoh, H.M., Schmidt, SJ., Day, G.A., and Faller, J.F. 2001. Investigation of commeal components using dynamic vapor sorption and differential scanning calorimetry. J. Food Sci. 66, 434-440. Tromp, R.H., Parker, R., and Ring, S.G. 1997. Water diffusion in glasses of carbohydrates. Carbo-hydr. Res. 303, 199-205. 

In mixed bilayer vesicles diacetylenic and natural lipids exhibit the same miscibility behavior as in monomolecular films. This can be demonstrated using differential scanning calorimetry (DSC). The neutral lipid (23) is immiscible with DSPC or DOPC as indicated by the two phase transitions of the mixed liposomes which occur at the same temperatures as those of the pure components (Fig. 33 a). 

Hoh et al. [4] used differential scanning calorimetry (DSC), FT-IR, and solid-state 13C-NMR to gain information about the epoxy/silane resin interphase. They used FT-IR to correlate the extent of reaction with the extent of interdiffusion as in the above studies. For both NMR and DSC studies, bulk models were used to study the molecular mobility of interfacial components. 

Permeability studies coupled with differential scanning calorimetry and thermal perturbation infrared spectroscopy investigations of the stratum corneum and its lipid and protein components have enabled the physical structure of the stratum corneum to be probed on a molecular level. 

Recently, two pyrazine (pz)-linked hetero-triads of cobalt phthalocyanine (CoPc) and ZnTPP, namely (CoPc)-pz-(ZnTPP)-pz-(CoPc) (15) and (ZnTPP)-pz-(CoPc)-pz-(ZnTPP) (16), have been prepared [30], The thermal properties of these triads and related macrocyclic components have been studied by thermal gravimetric analysis and differential scanning calorimetry. It has been found that the thermal stability of axial coordination increases in the order ZnPc(pz)2 < ZnTPP(pz)2 sa CoPc(pz)2, and the thermal decomposition of the triads 15 and 16 proceeds firstly via the degradation of the spacer ligand. 

The evidence from wide angle x-ray scattering (WAXS), differential scanning calorimetry (DSC), and IR spectroscopy (IR) shows that both polymers crystallize separately according to their own unit cell structure. The WAXS diffraction lines of each component are present in the blends no new bands appear (12,13,14). By DSC one observes the melting peaks corresponding to each polymer (Figure 1), and IR shows the typical characteristic crystalline bands of the pure polymers in the blends. The IR spectra of the blend can essentially be accounted for as the sum of the spectra of the components. 

Litwinienko, G., and Kasprzyska-Guttman, T. 2000. Study on the Autoxidation Kinetics of Fat Components by Differential Scanning Calorimetry. 2 Unsaturated Fatty Acids and Their Esters. Ind. Eng. Chem. Res., 39,13-17. 

The heat of gelatinization, which can be measured using differential scanning calorimetry, seems to be related directly to the amylopectin content, indicating that amylopectin (and not amylose) is the component responsible for the crystalline structure of starch (see the chapter, Physicochemical Structure of the Starch Granule ). 

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