Active Studies on Health Physics

Biochemical Studies on Active Transport

The active transport process, so important in cell function, has been studied in the past with intact cells. Models which have arisen from this work all depend on: first, a specific protein to recognize the substrate; second, translocation of the substrate across the cell membrane; third, release of substrate within the cell and restoration of the system to its initial state. These steps are ad...

Active vs passive recruitment to quitline studies: public health implications.

Survey Results on Active Galaxy Physics and Evolution

The cosmic X-ray background (XRB) is largely due to accretion onto supermassive black holes integrated over cosmic time. Thus, extragalactic X-ray surveys offer the potential to contribute substantially to our understanding of the physics of Active Galactic Nuclei (AGN) as well as the evolution of the AGN population. Such surveys have dramatically advanced over the past four years, largely due ...

Studies on the Active Site of Clostripain

Clostripain is rapidly and selectively inactivated by the chloromethyl ketone derived from cr-N-tosyl-L-lysine (TLCK) with an apparent second order rate constant of 8.7 X lo4 M-I set-i at pH 6.5. Alkylation by TLCK occurs only with catalytically active enzyme, the rate of which is considerably retarded by the competitive inhibitors, oc-Ntosyl-L-homoarginine methyl ester and benzamidine. In cont...

Studies on the Active Site of Chymotrypsin.

as it rises in b to enter c above the midline, etc. It can be easily seen that a similar oscillation about the midline takes place in the rotating fluid annulus of Figure 4a and in the more general situation of Figure 4b. These oscillations can be made quite small by adjusting the density of the buffer to match the particle density and by speeding up the rate of buffer flow to shorten the perio...