22 research outputs found
La faune ichtyologique des bassins du Mono et du lac Togo (Togo)
D'une façon générale le climat du Togo peut se diviser en deux régimes principaux : un régime subéquatorial au Sud et un régime tropical au Nord. Le Mono qui coule du Nord au Sud subit l'influence combinée de ces deux climats. Son régime hydrologique est du type tropical de transition, c'est-à-dire qu'il n'y a qu'une crue mais plus durable que celle des rivières de la région sahélo-soudanienne. Au total, 50 espèces ont été recensées dans le Mono grâce à divers moyens d'échantillonnage. Cela est assez loin de la capacité théorique qui est estimée à 60-61 si l'on considère l'ensemble du bassin versant mais se situe près de la capacité théorique calculée (52-53) sur une base ne prenant en compte que la partie du Mono toujours en eau, le cours supérieur étant asséché environ six mois de l'année. Le régime alimentaire de 20 espèces a été étudié, il ne diffère pas de ce qui est habituellement observé dans les autres rivières d'Afrique de l'Ouest. Certaines espèces ont une période de reproduction limitée durant la saison des hautes eaux, d'autres n'ont pas de saison de frai particulière. La fécondité observée sur neuf espèces est de l'ordre de celle constatée chez les mêmes espèces d'Afrique occidentale. (Résumé d'auteur
Iodine-125 brachytherapy for brain tumours - a review
Iodine-125 brachytherapy has been applied to brain tumours since 1979. Even though the physical and biological characteristics make these implants particularly attractive for minimal invasive treatment, the place for stereotactic brachytherapy is still poorly defined
Curative intended radiation therapy for young patients with invasive uterine cervical carcinoma: Clinical outcomes in 105 patients in a Japanese multi-institutional study
Care of Preschoolers with Congenital Heart Disease by Kindergarten and Nursery Teachers in Japan
Effect of grain boundary segregation of carbon on critical grain boundary strength of ferritic steel
Effects of Cocatalyst on Carrier Dynamics of a Titanate Photocatalyst with Layered Perovskite Structure
Mid-Infrared Surface Plasmon Polariton Sensors Resonant with the Vibrational Modes of Phospholipid Layers
We present an experimental study of subwavelength hole arrays in thin metal films employed as surface-enhanced optical sensors operating in the mid-infrared. The extremely narrow surface plasmon polariton spectral resonances are fitted to an analytical Fano interference model in the wavelength range 2-10 mu m. In general, the resonance frequency shifts after deposition of few-molecule layers (3.2-24 nm thickness) according to electrodynamic polarization models, hence allowing for label-free sensing. The absolute value of the shift is shown to depend on the overlap between the electric field distribution of the specific surface plasmon mode and the molecular layer, as verified by electromagnetic simulations. Biochemical sensor application is finally demonstrated by determining, from a single mid-infrared measurement, both the thickness and the absorption spectrum of phospholipid monolayers and trilayers, obtained by liposome adsorption.We present an experimental study of subwavelength
hole arrays in thin metal films employed as surface-enhanced optical
sensors operating in the mid-infrared. The extremely narrow surface
plasmon polariton spectral resonances are fitted to an analytical Fano
interference model in the wavelength range 2−10 μm. In general, the
resonance frequency shifts after deposition of few-molecule layers
(3.2−24 nm thickness) according to electrodynamic polarization
models, hence allowing for label-free sensing. The absolute value of
the shift is shown to depend on the overlap between the electric field
distribution of the specific surface plasmon mode and the molecular
layer, as verified by electromagnetic simulations. Biochemical sensor
application is finally demonstrated by determining, from a single midinfrared
measurement, both the thickness and the absorption
spectrum of phospholipid monolayers and trilayers, obtained by
liposome adsorption