Magnetic Circularly Polarized Luminescence in the Photoexcited States of Racemic [n]Helicenes (n=3-5,7) in Tetrahydrofuran and Dimethyl Sulfoxide Solutions.

This paper reports the first magnetic circularly polarized luminescence (MCPL) characteristics of racemic helicenes, including four unsubstituted [n]helicenes (n=3,4,5,7) and two [4]helicene derivatives bearing methoxy substituents, in tetrahydrofuran (THF) and dimethyl sulfoxide (DMSO) solutions. The value of |g | was calculated to be of the order of 10  T within 350-430 nm under the north-up (N-up) and south-up (S-up) Faraday geometries in an external magnetic field of 1.6 T.

Sign dependence of MCPL spectra on type and position of substituent groups of pyrene and phenanthrene derivatives.

Diamagnetic achiral pyrene and phenanthrene derivatives substituted with electron-donating hydroxyl/methoxy groups and electron-withdrawing carboxylic acid groups exhibited clear magnetic circularly polarised luminescence (MCPL) spectra at 360-460 nm in dilute solvents upon the application of N-up and S-up Faraday geometries under an external magnetic field of 1.6 T. Their MCPL signs were also susceptible upon application of the same Faraday geometry.

Photoinduced Reorientation and Photofunctional Control of Liquid Crystalline Copolymers with -Formed -Benzylideneaniline Derivative Side Groups.

The influence of the annealing conditions on the thermally stimulated photoinduced molecular reorientation of a photoinactive liquid crystalline polymethacrylate with phenyl aldehyde and benzoic acid side groups () doped with 4-methoxyaniline, which forms photoalignable 4-methoxy--benzylideneaniline (MNBA) side groups , was investigated. Light exposure and subsequent thermal stimulation under a N atmosphere realized sufficient cooperative molecular reorientation ( > 0.7), but the simultaneous thermal hydrolysis of the MNBA groups under humid air lowered the molecular reorientation performance.

A complementary scheme for automated detection of high-uptake regions on dedicated breast PET and whole-body PET/CT.

In this study, we aimed to develop a hybrid method for automated detection of high-uptake regions in the breast and axilla using dedicated breast positron-emission tomography (db PET) and whole-body PET/computed tomography (CT) images. In our proposed method, high-uptake regions in the breast and axilla were detected using db PET images and whole-body PET/CT images. In db PET images, high-uptake regions in the breast were detected using adaptive thresholding technique based on the noise characteristics.

Adaptation time, electroretinography, and pupillography in healthy subjects.

Purpose: To investigate the relationship between adaptation time and the parameters of electroretinography (ERG) and pupillography in healthy subjects.

Methods: Forty-six eyes of 23 healthy women (mean age 21.7 years) were enrolled.