Fourier transform infrared spectroscopy as a novel approach for analyzing the biochemical effects of anionic surfactants on a surfactant-degrading acrobacter butzleri strain

Cataloged from PDF version of article.Anionic surfactant-biodegrading capability of an Arcobacter butzleri strain was analyzed under aerobic conditions. The A. butzleri isolate displayed efficient surfactant-biodegrading capacity for sodium dodecyl sulfate (SDS) at concentrations of up to 100 mg/L in 6 days, corresponding to 99.0% removal efficiency. Fourier transform infrared spectroscopy was applied to observe the effects of varying concentrations of SDS on the biochemistry of bacterial cells. Results suggest that protein secondary structures were altered in bacterial cells at sufficiently high SDS concentrations, concurrent with SDS biodegradation

Temperature tunable LNA microchip lasers for helium pumping near 1083 nm

No abstract availabl

Laser UV à semiconducteur nitrure pompé par des micropointes

Dans un Laser à Semiconducteur Micropointes (LSM), le milieu amplificateur est pompé par un faisceau d'électrons issus de micropointes effet de champ. Ce type de laser est particulièrement adapté aux semi-conducteurs à grands gaps tels que les nitrures GaN et AIN émettant dans l'UltraViolet, pour lesquels le dopage et la prise de contact ohmique deviennent problématiques. Ce papier présente ce dispositif et l'état d'avancement des travaux

CdTe/CdMnTe GRINSCH \Graded Index Separate Confinement Heterostructure\ structures for compact lasers in the visible region

SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : RM 1409 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Self-assembled GaN quantum dots grown by plasma-assisted molecular beam epitaxy

It is shown that under specific growth conditions the strain relaxation of GaN deposited on AlN obeys the Stranski-Krastanov mechanism. As a consequence, it is demonstrated that, for both cubic and hexagonal phases, the growth of self-organized three-dimensional islands can be achieved. These islands behave as quantum dots, exhibiting optical properties dominated by localization effects