Signaling Recognition Events with Fluorescent Sensors and Switches.

The Stability of Cyclodextrin Complexes in Solution.

Two-photon fluorescence microscopy is one of the most important recent inventions in biological imaging. This technology enables noninvasive study of biological specimens in three dimensions with submicrometer resolution. Two-photon excitation of fluorophores results from the simultaneous absorption of two photons. This excitation process has a number of unique advantages, such as reduced specimen photodamage and enhanced penetration depth. It also produces higher-contrast images and is a novel method to trigger localized photochemical reactions. Two-photon microscopy continues to find an increasing number of applications in biology and medicine.

Two-Photon Excitation Fluorescence Microscopy

Role of Structural Factors in the Nonlinear Optical Properties of Phthalocyanines and Related Compounds

http://dbkgroup.org/Papers/davey_kell_micrev96.pdf

Flow cytometry and cell sorting of heterogeneous microbial populations: the importance of single-cell analyses.

Unique properties of chromophore-containing bilayer aggregates: enhanced chirality and photochemically induced morphological change

Fluorescence quenching of pyrene and naphthalene in aqueous cyclodextrin solutions. Evidence of three-component complex formation

Photoresponsive membranes have been constructed by incorporating the amphiphatic alkylammonium salts containing azobenzene chromophores into dipalmitoylphosphatidylcholine liposomes.

PHOTORESPONSIVE MEMBRANES. REGULATION OF MEMBRANE PROPERTIES BY PHOTOREVERSIBLE cis–trans ISOMERIZATION OF AZOBENZENES

— Photoresponsive artificial membranes have been prepared by embedding amphiphatic alkyl-ammonium salts containing azobenzene chromophore in dipalmitoylphosphatidylcholine liposomes. The configurational change due to transcis photoisomerization of the azobenzene chromophore provided the perturbation of the membrane structure to result in the increase of the water and bromo-thymol blue permeability of the liposomal membranes.

Photoresponsive artificial membrane. regulation of membrane permeability of liposomal membrane by photoreversible cis‐trans isomerization of azobenzenes

The Balmer-β line of the excited hydrogen atom ( n = 4) (H*) produced in e—H 2 collisions has been measured at a resolution of about 0.03 A and at angles of 55° and 90° with respect to the electron beam. The translational energy distribution of H* has been calculated from an analysis of the line shape. Three major components appear and their peaks lie at about 0, 4 and 8 eV. The excitation function of H* is found to have three thresholds at 17.1, 24 and 27 eV. These results show that there are three major processes for the formation of H*: dissociation through the (1sσ g )(4l) states of H 2 and predissociation through relevant Rydberg states for the 0 eV component; dissociation mainly through the (2pσ u ) 2 state for the 4 eV component; and dissociation mainly through the (2pσ u (4l) states for the 8 eV component.

Teiichiro Ogawa

Papers

Unique properties of chromophore-containing bilayer aggregates: enhanced chirality and photochemically induced morphological change

Fluorescence quenching of pyrene and naphthalene in aqueous cyclodextrin solutions. Evidence of three-component complex formation

PHOTORESPONSIVE MEMBRANES. REGULATION OF MEMBRANE PROPERTIES BY PHOTOREVERSIBLE cis–trans ISOMERIZATION OF AZOBENZENES

Photoresponsive artificial membrane. regulation of membrane permeability of liposomal membrane by photoreversible cis‐trans isomerization of azobenzenes

Translational energy distribution and production mechanism of excited hydrogen atoms produced by controlled electron impact on H2