The chemical and enzymatic properties of the cytochrome system in the particulate preparations obtained from dormant spores, germinated spores, young vegetative cells, and vegetative cells of Bacillus subtilis PCI219 were investigated. Difference spectra of particulate fractions from dormant spores of this strain suggested the presence of cytochromes a, a(3), b, c(+c(1)), and o. All of the cyto...

The extraction of chemical information from dense particulate suspensions, such as industrial slurries and biological suspensions, using near-infrared (NIR) spectroscopic measurements, is complicated by sample-to-sample path-length variations due to light scattering. Empirical pre-processing techniques such as multiplicative scatter correction (MSC), extended MSC, and derivatives have been appl...

Engineered cocrystals offer an alternative solid drug form with tailored physicochemical properties. Interestingly, although cocrystals provide many new possibilities, they also present new challenges, particularly in regard to their design and large-scale manufacture. Current literature has primarily focused on the preparation and characterization of novel cocrystals typically containing only ...

Groups of randomly bred infant Swiss mice were given s.c. injections of suspensions of (a) an organic extract of particulate atmospheric pollutants collected in New York City; (b) derived acidic, basic, neutral, aliphatic, aromatic, and insoluble fractions; and (c) three oxyneutral subfractions, in total doses of 10, 20, and 40 mg. Each test group consisted of a minimum of 44 mice; concurrent c...

Marine aggregates, agglomerations of particles and dissolved materials, are an important particulate pool in aquatic environments, but their optical properties are not well understood. To improve understanding of the optical properties of aggregates, two related studies are presented. In the first, an in situ manipulation experiment is described, in which beam attenuation of undisturbed and she...

Phase-separable particulate-containing gel structures constitute complex fluids. In many cases they may incorporate component concentration inhomogeneities within the ensemble matrix. When formulated into high consistency suspensions, these can lead to unpredictable time-dependent variations in rheological response, particularly under shear in simple parallel plate and cylindrical rotational ge...