Transition parameter

The relationship between Tg and microbial stability is the least studied of all the stability areas. Based mainly on mold germination data, Slade and Levine (1991) postulated that glass transition parameters, specifically Tm/Ts ratio, T g and W g (related to C defined previously in Figure 32), could be useful for predicting the microbial stability of concentrated and... 

First-order phase transition from a nucleonic matter to the strange quark state with a transition parameter A > 3/2 that occurs in superdense nuclear matter generally gives rise to a toothlike kink on the stable branch of the dependence of stellar mass on central pressure. Based on the extensive set of calculated realistic equations of state of superdense matter, we revealed a new stable branch of superdense configurations. The new branch emerges for some of our models with the transition parameter A > 3/2 and a small quark core (.Mcore 0.004 A- 0.03M ) on the M(PC) curve, with Mmax 0.08M and A 0.82M for different equations of state. Stable equilibrium layered... 

The values given in this table represent randomly selected data from many studies or a particular cultivar/ variety used in the study. Starch phase transition parameters, measured by DSC, may change depending on many factors, including variety, cultivar, hybrid, starch water ratio in the sample, and scanning/experimental conditions. 

Table 4. EPR and Intervalence Transfer Transition Parameters for Half Met L Hemocyanlns...

We then investigated the formation of hybrid molecular assemblies in combinations of anionic peptide lipid 9 with cage-type hosts 7 and 8 after a previous method [44], Lamella-type aggregates are observed for a mixture of host 7 and lipid 9 at a 1 20 molar ratio in the dispersion state by negative staining electron microscopy. Phase transition parameters (temperature at peak maximum, T enthalpy change, AH entropy change, dS half-width of an endothermic peak, and hydrodynamic diameters (d,y) for the bilayer... 

Table 2. Phase transition parameters for aggregates in the dispersion state ...

Table 1. Helix-coil transition parameters for synthetic polypeptides...

Table 5. Transition Parameters of Mesophases of Macromolecules with Side-Chain Mesogens... 

Table 6 contains data on the transition parameters for a large series of main-chain mesogen macromolecules. Figure 15 shows scanning calorimetry data for poly(oxy-2,2 -dimethylazoxybenzene-4,4 -diyloxydodecanedioyl), entry 8 in Table 6. These data should be compared to data on low molecular mass p-butyl-p -methoxyazoxy-benzene which are shown in Fig. 12. Similar comparisons are available for two benzalazines (entries 14 and 16 of Table 6). Although the entropies of transition from the liquid crystal to the isotropic melt are small for all polymers listed as expected, they are larger than those of the corresponding nematic small molecules [1.6, 3.35, and 3.26 J/(K mol), respectively for the small molecules corresponding to entries 8, 14, and 16]. The main-chain nematics seem to have a somewhat larger entropy of transition than the side-chain nematics for larger flexible spacers.

Table 8. Transition Parameters of Macromolecular Condis Crystals...

The interactions of TDZ (6) with model membranes composed of different phospholipids were also studied by the same group [78]. Calorimetric studies demonstrated that TDZ (6) altered the thermotropic properties of negatively charged DMPC membranes to a larger extent than of zwitterionic phospholipids (PC and PE). The character of the drug-induced changes of the transition parameters of all studied lipids indicated that TDZ (6), similarly to other phenothiazine derivatives, was likely to be localized close to the po-lar/apolar interface of the bilayers. Experiments in which fluorescent probe 1,6-diphenyl-1,3,5-hexatriene (DPH) was employed revealed that TDZ (6) reduced the mobility of lipid molecules in a concentration-dependent manner and thus decreased membrane fluidity. The influence of TDZ (6) on isolated... 

Fig. 1 Composition dependence of the thermal transition parameters, Tg, Tm, and AFZf, estimated by DSC for CA-g-PLA samples (acetyl DS = 2.15). Data for Tm (melting temperature) and AHf (enthalpy of fusion) were obtained in the first run, while Tg was evaluated in the second. (Quoted from [23] with an adequate modification)...

All pressure-driven, rectilinear duct flows, whether Newtonian or non-Newtonian, undergo transition to turbulence when the transition parameter of Hanks, defined by... 

A map is commonly used for displaying the regimes of validity of the particular contact models (Fig. 4). The coordinates of the map are given by the transition parameter A as given by Eq. (4) and the ratio P = P/nwR. Here, P denotes the external load and 7iwR denotes a representative adhesive pull-off force Pad. 

Similar to Muller et al. [103], several authors performed self-consistent numerical computations of the non-linear equations based on the Lennard-Jones potential instead of dealing with analytical approaches. Greenwood [108, 109] and Feng [112] calculated the dependence of the pull-off force on the transition parameter A. For fixed y and R, softer spheres require less force to separate, though they deform more significantly. At the extreme limits of small and large values of A, however, the pull-off force becomes virtually independent of A. On a local scale, this is consistent with the prediction of the JKR and the DMT model that the pull-off force is independent of elastic moduli of spheres [112]. 

In analogy to indentation experiments, measurements of the lateral contact stiffness were used for determining the contact radius [114]. For achieving this, the finite stiffness of tip and cantilever have to be taken into account, which imposes considerable calibration issues. The lateral stiffness of the tip was determined by means of a finite element simulation [143]. As noted by Dedkov [95], the agreement of the experimental friction-load curves of Carpick et al. [115] with the JKR model is rather unexpected when considering the low value of the transition parameter A(0.2Further work seems to be necessary in order to clarify the limits of validity of the particular contact mechanics models, especially with regard to nanoscale contacts. 

Langer and Doltsinis [41, 42] find that the nonadiabatic transition parameter (10-10) is correlated to variations in the C(5)C(6) bond length as well as to out-of-plane motions. The importance of this degree of freedom for radiationless decay has been pointed out previously by Zgierski et al. [103],... 

Figure 10-14 demonstrates that typically the nonadiabatic transition parameter (10-10) is smaller compared to the 9Me-keto tautomer. In particular, due to the absence of any large out-of-plane deformations, there is no steep increase at about 40 fs. This explains why 7Me-keto G is somewhat longer lived than 9Me-keto G. Both methylated tautomers exhibit longer excited state nonradiative lifetimes than their unmethylated counterparts. 

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