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A mechanism for the oxidation of glutathione to glutathione disulfide with organotellurium(IV) and organoselenium(IV) compounds. A stepwise process with implications for photodynamic therapy and other oxidative chemotherapy
(The American Chemical Society: The Journal of Organic Chemistry, 1994-12-30)
The reactions of telluroxides or their hydrates 3-5 with glutathione to give telluropyrylium dyes 1, 2 or diphenyl telluride, respectively, and glutathione disulfide have at least two discrete steps. A fast reaction, which ...
Quarter-micron lithography with a gapped Markle-Dyson system
(American Vacuum Society, 1994-11)
0.25-µm lithography has previously been demonstrated using an ungapped prototype Markle–Dyson system, in which the wafer was held in soft contact with the mask. However, such an in-contact scheme would be inappropriate for ...
Computer simulation of photoconductivity decay in AgBr microcrystals: Relaxation model
(American Institute of Physics, 1994-10-01)
Previous workers have explained photoconductivity decay in AgBr microcrystals by proposing a model involving lattice relaxation following shallow surface trapping of electrons. This model is investigated using Monte Carlo ...
History-dependent control of unstable periodic orbits
(American Physical Society, 1994-09)
We present a method of stabilizing unstable periodic orbits in systems whose natural time scales are on the order of or faster than the time it would take for the experimental implementation of the Ott-Grebogi-Yorke (OGY) ...
Swelling of copolymer micelles by added homopolymer
(American Chemical Society: Macromolecules, 1994-08-15)
We present a simple theory and a supporting experimental study of the extent to which block
copolymer micelles in a homopolymer matrix can be swollen by relatively low molecular weight homopolymer which is compatible with ...
Stepwise mechanism for oxidative addition of bromine to organoselenium(II) and organotellurium(II) compounds
(The American Chemical Society: Organometallics, 1994-08)
The oxidative-addition reactions of bromine (5 x 10(-4) or 5 x 10(-5) M) to phenyl selenide (1), phenyl telluride (2), 2,6-di-tert-butylselenopyran-4-one (3), 2,6-di-tert-butyltelluropyran-4-one (4), 2,6-diphenyltelluropyran-4-one ...
Period-doubling route to chaos in a semiconductor laser subject to optical injection
(American Institute of Physics, 1994-06-27)
Experimental measurements and a single-mode analysis of a quantum-well laser diode subject to strong optical injection are combined to demonstrate that the diode follows a period-doubling route to chaos. All laser parameters ...
Modeling the performance of a high-speed scan mirror for an airborne line scanner
(The International Society for Optical Engineering (SPIE), 1994-04-01)
The Digital Imaging and Remote Sensing Laboratory at the
Rochester Institute of Technology is developing a new airborne multispectral
imaging scanner. One of the most critical components of the
scanner system is the ...
Synchronization of chaotic diode resonators by occasional proportional feedback
(American Physical Society, 1994-03-14)
Synchronization of a pair of chaotic diode resonators has been experimentally achieved by applying a minute feedback signal to the amplitude of the drive voltage of a slave resonator. The signal is proportional to the ...
A Near stellar occultation by P/Grigg-Skjellerup
(International Society for Optical Engineering (SPIE), 1994-03)
P/Grigg-Skjellerup was observed to pass within 200 km of the line of sight to an anonymous faint star on the 1992 July 8 UT. The star's brightness was attenuated by 35% at closest approach by the comet. This result, combined ...