The pressure dependence of the decay of exciplex formed between acetophenone (AP) and N,N,N',N'-tetramethylbenzidine (TMB), and anthracene (A) and N,N-dimethylaniline (DMA) was studied in supercritical carbon dioxide by transient absorption and fluorescence techniques. Both the exciplexes showed similar trend in decay rate constant measured at various pressures of supercritical carbon dioxide. ...

Investigation of their ultracentrifugal and electrophoretic behavior and chemical reactivity has been used to characterize the suprastructure of the nongenetic urease isozymes. As purified from jack bean meal, urease is obtained in the LY form (M, = 480,000, s20,W = 18.3), which is composed of two noncovalently bound, equal and active A1 half-units (M, = 240,000, sZo,W = 11.5) which separate af...

or non-reacting gas mixtures, thus enabling values of (for such mixtures T to be used to guide the equation of state theory for mixtures. This is of interest, for a complete knowledge of the van der Waals forces in mixtures is of profound importance in the application of thermodynamics to chemical equilibria at finite pressures. I J. W. Gibbs, Scientific Papers, Vol. I, p. 87. 2 J. A. Beattie, ...

This study is an experimental laboratory, conducted to get the antibacterial activity in types of multiflora honey, randu mente rambutan sono acacia rubber honey. In this study, preliminary tests, phytochemical screening, and tests have been carrying out determine Minimum Inhibitory Level (MIC) Killing Rate (KBM) at concentrations 20, 25, 50, 100%. Phytochemical test results it's known that eac...

The methyl groups of choline which have been shown to be donated in various reactions in animal metabolism (1, 2) have not been demonstrated to participate in plant methylation reactions. Experiments by Matchett, Kirkwood, and Marion (3, 4), Dubeck and Kirkwood (5), and Sribney and Kirkwood (6), with Hordeum distichum, Ricinus communis, and Dice&a hybrids in which choline was supplied as a poss...

A formally exact Kirkwood-Buff virial formula for the surface tension of a supersaturated interface is derived. A modified Gibbs ensemble method is given that allows the creation of interacting supersaturated phases of equal chemical potential, and which enables the Kirkwood-Buff formula to be applied. The methods are tested by Monte Carlo simulation of a supersaturated Lennard-Jones fluid with...