let r be a prime ring with extended centroid c, h a generalized derivation of r and n ⩾ 1 a xed integer. in this paper we study the situations: (1) if (h(xy))n = (h(x))n(h(y))n for all x; y 2 r; (2) obtain some related result in case r is a noncommutative banach algebra and h is continuous or spectrally bounded.

The (p, q)-growth of entire function solutions of Helmholtz equations in R has been studied. We obtain some lower bounds on order and type through function theoretic formulae related to those of associate. Our results extends and improve the results studied by McCoy [10].

CHONDRITES. T.J. McCoy, C.M. Corrigan, J. Davidson, D.L. Schrader, and K. Righter Dept. of Mineral Sciences, Smithsonian Institution, Washington DC 20560-0119 USA ([email protected]) Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC 20015-1305, USA Center for Meteorite Studies, School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287 USA...

The intracellular penetration and activity of linezolid in human polymorphonuclear leukocytes and tissue-cultured cells (McCoy) were evaluated. Linezolid reached intracellular concentrations slightly greater than extracellular ones in both types of cell. The uptake was rapid and not saturable and was affected by environmental temperature and cell viability. Linezolid showed slight intracellular...

ASSIMILANT. V. S. Reynolds, H. Y. McSween, Jr., W. F. McDonough, and T. McCoy, Department of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560-0119, USA, Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996-1410, USA, Geochemistry Laboratory, Department of Geology, University of Maryland, College Park, MD 2074...

To the Editor:-The McCoy levering laryngoscope is a useful device,’.’ but does not uniformly improve the view in some cases of difficult laryngoscopy.’.’ We report a case in which the McCoy laryngoscope did not improve the direct view of the larynx, but instead lifted the epiglottis and expanded structures around the laryngeal aperture (LA), thereby facilitating “blind” tracheal intubation. A 7...

a ring $r$ is a strongly clean ring if every element in $r$ is the sum of an idempotent and a unit that commutate. we construct some classes of strongly clean rings which have stable range one. it is shown that such cleanness of $2 imes 2$ matrices over commutative local rings is completely determined in terms of solvability of quadratic equations.

The technique of cultivation ofTRIC agent, and other Chlamydia (Bedsonia) by centrifugation onto irradiated McCoy cells, developed by Gordon, Magruder, Quan, and Arm (i 963), Magruder, Gordon, Quan, and Dressler (i963), and Gordon, Dressler, and Quan (I967), has been used to recover laboratory-adapted isolates of TRIC agent from the infected eyes of simians (Gordon and others, I963) and of man ...

in this paper we define a new type of rings ”almost powerhermitian rings” (a generalization of almost hermitian rings) and establish several sufficient conditions over a ring r such that, every regular matrix admits a diagonal power-reduction.