イオン液体の光安定性に対する構成イオンの効果

Photodegradation products of imidazolium ionic liquids by using 266nm laser irradiation are reported. It is found that photodegradation productsconsist of several highly colored and colorless products. The main photodegraded products are the imidazolium salt with butyl chain dissociated. Photodegradation depends on anion. Photostability was found to increase in the order : bis(trifluoromethanesulfonyl)imide (Tf2N)- > BF4- >Pf6-. C-2 substitution to methyl group of ionic liquids have a great effect to suppress the photo-degradation. Reaction mechanism is related to the C-2 proton acidity and hydrogen bonding between cation and anion. These results indicate that for photochemical reaction in imidazolium ionic liquids by using UV light source should be noted and the deactivation caused by the photolysis of ionic liquids should be considered

Lactobacillus pentosus strain b240 suppresses pneumonia induced by Streptococcus pneumoniae in mice.

Oral administration of probiotics has been known to improve inflammatory responses against infectious diseases. Here, we describe the inhibitory effect of oral intake of heat-killed Lactobacillus pentosus strain b240 (b240) on pneumococcal pneumonia in a murine experimental model

Design of a Semi-confocal Fluorescence Microscope for Observing Excitation Spectrum of Soluble Molecules Adsorbed at the Air/water Interface

A semi-confocal fluorescence microscope is designed and constructed aiming to observe fluorescence excitation spectrum of soluble molecules adsorbed at the air/water interface. With a conventional confocal fluorescence microscope, the target molecules of pyrene arises some difficulties: excitation wavelength in deep ultraviolet forces low transmission performance of microscopic objectives and low wavelength-tunable performance of an excitation laser. A total internal reflection illumination with a light-guide coupled monochromated-xenon lamp is combined with the confocal fluorescence microscope. Theoretical feasibility and performance of the microscope are discussed with preliminary results obtained