The optical and infrared colors of L and T dwarfs are sensitive to cloud sedimentation and chemical processes in their atmospheres. In particular the J − K color of a cooling brown dwarf is sensitive to the vertical distribution of condensates in its atmosphere. Only atmosphere models which include sedimentation of condensates are able to reproduce the observed trends in J −K in which objects f...

The optical and infrared colors of L and T dwarfs are sensitive to cloud sedimentation and chemical equilibrium processes in their atmospheres. The i − z vs. J −K color-color diagram provides a window into diverse atmospheric processes mainly because different chemical processes govern each color, and cloud opacity largely affects J −K but not i − z. Using theoretical atmosphere models that inc...

The suitability of sedimentation equilibrium for characterizing the self-association of muscle glycogen phosphorylase b has been reappraised. Whereas sedimentation equilibrium distributions for phosphorylase b in 40 mM Hepes buffer (pH 6.8) supplemented with 1 mM AMP signify a lack of chemical equilibrium attainment, those in buffer supplemented additionally with potassium sulfate conform with ...

Kreuz, Leo E. (The Johns Hopkins University School of Medicine, Baltimore, Md.), and Allan H. Levy. Physical properties of chick interferon. J. Bacteriol. 89:462-469. 1965.-The sedimentation coefficient, diffusion coefficient, and molecular weight of chick-embryo interferon were determined by zone centrifugation and equilibrium sedimentation in cesium chloride density gradients, and by chromato...

Amyloid fibrils were isolated from the tissues of nine patients with amyloidosis in a state of high purity by homogenization of the tissue followed by extraction with distilled water. Physical, chemical, and ultrastructural studies suggest that amyloid fibrils from different individuals resemble each other, but are not identical. In tissue sections as well as by negative staining of isolated fi...

Freshwater wetlands located in dryland environments are characterised by high evapotranspiration rates and frequent periods of desiccation, which strongly influence the water chemistry solute budgets these systems. The transpiration groundwater, especially trees, is an important mechanism through can lose water. This process lead to groundwater salinization precipitation substantial quantities ...