The parameters n and m were originally defined by Wells [15], with n being the number of intermolecular H-bonds formed by a molecule and m the number of molecules to which the latter is joined, while k denotes the size of the essential ring of the net (for the whole crystal, the ratio between the number of H-bonds and the number of molecules is n/2).
However, we did not use these lines to test for crystal cell/plasmatocyte ratio alterations because it would be difficult to discern between the effect of not having the clusters and the effect of gene up-regulation in hemocytes.
Crystallization from the melt and partial melting of samples indicate that the isotactic PMMA also is able to crystallize the stereocomplex crystals, the ratio of these two crystalline species being very sensitive to the stoichiometric ratio of the mixture and the isotactic content of the PMMA.
Energy dispersive X-ray spectroscopy (EDX; Phoenix EDAX X-ray analyzer equipped with a Sapphire super ultra-thin window detector attached to a Hitachi S-4700 FE-SEM) was used to determine the crystal Si/Al ratios.
Large zeolite ZSM-5 crystals (Si/Al ratio of 17, 100 μm×20 μm×20 μm) were provided by ExxonMobil (Machelen, Belgium).
A stable 1D magnet can be obtained as well on the basis of elongated crystals (aspect ratio > 1.25) aligned with their elongation axis along the chain axis.
In contrast, much denser spherical mineral nodules composed of platelet-like calcium-deficient apatite crystals (Ca/P ratio: 1.27 ± 0.02) with more than doubled surface coverage (71%) were obtained on the Ti-pSBMA substrates, supporting that the zwitterionic polymer coatings more effectively templated the heterogeneous mineral nucleation and growth.
The zeolite type (crystal structure, SiO2/Al2O3 ratio and surface net charge) play a relevant role in the dispersion of DAPs.
The poly ethylene terephthalate)/thermotropic liquid crystal polymer (weight ratio 80 20) blend composites with two different weight percentages of nanoclay were prepared using a twin-screw extruder.
Si/Al ratio, crystal cell parameters, and crystallinity were characterized by X-ray diffraction (XRD) analysis (X'Pert PRO MPD, Holland).
