Purpose: To investigate the neuroprotective effect of erythropoietin (EPO) against hypoxic-ischemic brain injury in neonatal mice, and underlying mechanism(s) action.
 Methods: Sixty mice were assigned to 3 groups: sham, model EPO intervention groups, each with 20 mice. Western blot assay was used determine changes protein expressions AMPK, UCP2 KLF2. Fluorescence intensity reactive oxygen...

Steady-state fluorescence spectroscopy is highly sensitive an analytical fluorescence detecting tool limited to diluted samples. The serious problem of quantitative analysis is dominant in the samples with optical density higher than 0.05 (10 mm cell) detected in the right angle cell geometry, because of the two kinds of inner filter effects IFEs (Lakowicz, 2006; Li & Hu, 2007; Kao et al., 1998...

A new fluorescence dye, N-amino-4-(2-hydroxyethylamino)-1,8-naphthalimide (AHN), based on 4-bromo-1,8-naphthalic anhydride was synthesized as a fluorescence probe for determining water content in organic solvents. Changing from a non-polar to a polar solvent increases the solvent interaction with excitation spectrum and emission spectrum shifts to longer wavelengths. The fluorescence intensity ...

We establish fluorescence fluctuation spectroscopy (FFS) with nanoscale detection volumes generated by stimulated emission depletion. Our method applies fluorescence correlation spectroscopy and fluorescence intensity distribution analysis to extract molecular information about mobilities and fluorescence emission in solution. The combination of correlation analysis with that of photon intensit...

We present a new method of fluorescence imaging, which yields nm-scale axial height determination and ~15 nm axial resolution. The method uses the unique spectral signature of the fluorescent emission intensity well above a reflecting surface to determine vertical position unambiguously. We have demonstrated axial height determination with nm sensitivity by resolving the height difference of fl...

OBJECTIVES Airway complications related to ischaemia are a major cause of morbidity after lung transplantation. Early detection of airway ischaemia and optimal management of the anastomotic site could reduce the risk of airway complications. Autofluorescence imaging (AFI) bronchoscopy has been increasingly recognized as an effective technique for detecting abnormal mucosal thickening. The aim o...

Regulation of nonradiative dissipation of absorbed light energy in PSII is an indispensable process to avoid photoinhibition in plants. To dissect molecular mechanisms of the regulation, we identified Arabidopsis mutants with reduced quenching of Chl fluorescence using a fluorescence imaging system. By analyses of Chl fluorescence induction pattern in the light and quantum yield of both photosy...

We compare the accuracy of a variety of Fluorescence Fluctuation Spectroscopy (FFS) methods for the study of Förster Resonance Energy Transfer (FRET) assays. As an example, the cleavage of a doubly labeled, FRET-active peptide substrate by the protease Trypsin is monitored and analyzed using methods based on fluorescence intensity, Fluorescence Correlation Spectroscopy (FCS) and Fluorescence In...

A new series of photoactive metallocyclodextrins with increased fluorescence intensity upon binding with ssDNAs/aptamers has been demonstrated to sensitively and selectively detect lysozyme. The detection mechanism relies on the formation of an aptamer-lysozyme complex, which leads to reduction of fluorescence intensity.