Now showing items 41-50 of 919
Decay characteristics of 84Se
(Elsevier, 1968-11)
The nuclide 84Se has been identified among the fission products of 235U. The selenium fraction was obtained by solvent extraction from HBr into 2,6-dimethyl-4-heptanone. The radiations were studied by [beta]- and [gamma]-ray ...
Dynamics of energy transport in ternary molecular solids. I. Naphthalene steady state fluorescence
(Elsevier, 1981-05-01)
Energy transport experiments were conducted at liquid helium temperatures on ternary single crystals (host/guest/ supertrap, i.e. C10H8/C10D8/betamethylnaphthalene-d10) at guest concentrations of 50--99% and very low (about ...
The synthesis and chemistry of certain anthelmintic benzimidazoles
(Elsevier, 1990-04)
A basis for interest in the benzimidazole ring system as a nucleus from which to develop potential chemotherapeutic agents was established in the 1950s when it was found that 5,6-dimethyl-l-([alpha]-D-ribofuranosyl)benzimidazole ...
The illumination of molecular behavior by electron waves
(Elsevier, 1985-01)
Aspects of vapor-phase electron diffraction are discussed, singling out the seminal contributions of Yonezo Morino in collaboration with San-ichiro Mizushima and others. Recent developments leading to a precision approaching ...
The -ills of Educational Reform
(Springer-Verlag; Springer-Verlag New York, Inc., 1998-02)
Many instructors have sincerely accepted problem solving and critical thinking as instructional objectives. This kind of language, especially notions of the liberal-arts values of taking college classes, is used in compelling ...
Synthesis of polyamines with pendant cyanoimidazole units and their electrochemical properties
(John Wiley & Sons, Inc., 1998-10)
The 2-(1-methyl-4,5-dicyanoimidazolyl) group was attached to poly(diallylamine) and polyethylenimine, affording polymers containing an electron-withdrawing pendant group. The key to their preparation is high reactivity of ...
Measurement of ammonia and glutamine in cell culture media by gas sensing electrodes
(Kluwer Academic Publishers; Science & Technology Letters ; Springer Science+Business Media, 1989-04)
This paper describes the use of a commercially available off-line gas sensing electrode for determination of ammonia and glutamine in cell culture media. The measurement technique was tested in different media preparations ...
Form IV of carbamazepine
(Wiley Subscription Services, Inc., A Wiley Company, 2002-04)
Carbamazepine has been found to crystallize as a new polymorph that is stable at room temperature. We report the crystal structure of this C -centered monoclinic form (space group C 2/ c , cell parameters: a = 26.609, ...
Spectral variational principle for Green's functions
(Springer-Verlag, 1972-12)
For a suitable approximation ( q, q′, τ ) to the Dirac-Feynman Green's function of a quantummechanical system, the parameter is defined, where ℒ≡ i ∂/∂τ−ℋ. It is shown that Δ ≧0 and Δ →0 as K→K , the exact Green's function, ...
Two-particle continuous-time random walks and binary reactions in disordered media
(Elsevier, 1984-02-10)
The relation between unary-(trappihg) and binary (mutual annihilation) reactions in disordered systems is studied in the framework of the continuous-time random walk. It is found that if the waiting-time distribution of ...