other compounds found in healthy cell walls (Cochrane et al., 2000), as well as from a number of compounds Carotenoids, compounds valuable for their antioxidant properties that increase in concentration during host–pathogen inin humans and animals, are sometimes present in the bran layers of teractions (Pierce and Essenberg, 1987; Belefant-Miller rice (Oryza sativa L.). We developed a nondestru...

This paper presents the results of absorption spectra, fluorescence properties and the effect of solvents on UV-Vis spectra of dye quaternized 4-acetylamino-N-2-aminomethylpyridine-1,8-naphthalimide. The fluorescency of the dye was evaluated and its Stokes shift value was 6140 cm-1 in DMF. The solvatochromism behavior of the novel compound is investigated by studying its spectra in pure organic...

A quantum dot (QD) conjugated whole-cell E. coli biosensor (E. coli–QD bioconjugates) was developed as a new molecular tool for probing cellular damage. The E. coli–QD bioconjugates were viable and exhibited fluorescence emission at 585 nm. Scanning electron microscopy (SEM) analysis of E. coli–QD bioconjugates revealed that the QDs were immobilized on the cell-surfaces and the fluorescence emi...

in the near future, design of a new generation of drugs targeting proteins will be required. considering the complex bond between the drug and protein, the structure and stability of the target protein should be considered. so far, a series of in vitro investigations have been conducted with the aim of predicting drug-biological medium interactions. in these studies, use of spectroscopic method...

six fluorescent compounds were isolated and characterized in rhizomorph of a. mellea and were presented first as: f , f , f , mf , mf and mf . these compounds differed by rf on chromatoplaque, max in uv spectra and ex, em and max in fluorescence spectra. their gc-ms analysis indicated that f has a phenolic moiety and the other five are the benzenic derivatives. f compound was more fluorescent r...

Being different from common sensing molecules existing as monomer in solution, the gelators as sensing molecules self-assembled together in gels. Therefore, the interaction strength between gelators is believed as an important factor for gels to recognize selectively anions. In this paper, we choose two gelators, presenting similar binding sites for anions, but different strengths in intermolec...

We have detected the synchronous enhancement of Ca II H & K emission with the short-period planetary orbit in HD 179949. High-resolution spectra taken on three observing runs extending more than a year show the enhancement coincides with φ ∼ 0 (the sub-planetary point) of the 3.093-day orbit with the effect persisting for more than 100 orbits. The synchronous enhancement is consistent with plan...

Software package Mathematica is used for computer simulation of steady state fluorescence spectra of ring molecular system. The cyclic antenna unit LH2 of the bacterial photosystem from purple bacterium Rhodopseudomonas acidophila can be modeled by such system. Dynamic disorder, interaction with a bath, is included in Markovian approximation. Also three different models of uncorrelated static d...

Wild-type apocytochrome c and its hydrophobic segment deleted mutants, named delta28-39, delta72-86 and delta28-29/72-86 were constructed, expressed and highly purified respectively. Insertion ability into phospholipid monolayer, inducing leakage of entrapped fluorescent dye fluorescein sulfonate (FS) from liposomes, and translocation across model membrane system showed that the wild-type apopr...