We have observed optical bistability caused by absorption-induced thermal expansion of mirrors forming a Fabry-Perot interferometer. From the resulting anomalous transmission line shapes, absorption coefficients of the mirror coatings as low as 0.2parts in 10(6) (ppm) have been successfully measured.

We present experimental data showing a significant dependence of light absorption on temperature in photorefractive LiNbO3 :Fe crystals. The results are successfully explained by assuming that the widths of the Fe absorption bands in the visible and in the infrared spectral region depend on temperature. The findings are of relevance for thermal fixing of holograms. Furthermore, a temperature-in...

The quantum confinement model, which assigns some of the luminescence features in porous silicon to size quantization in Si nano-crystallites, also predicts quantization of both the conduction and valence bands into sub-levels. In order to resolve this effect we have used a new experimental technique called “photo-induced infrared absorption spectroscopy”. Here, a pump, visible laser, optically...

It remains a significant challenge to overcome the poor permeability of cyclosporine A and enhance its oral absorption. In this study, we have identified a positively charged chitosan that is able to induce coiling up of anionic lipids to form nanocochleates with an average size of 114.2 ± 0.8 nm, without the need for calcium ions. These functional chitosan-induced nanocochleates enhanced gastr...

heparin- induced thrombocytopenia (hit) is an antibody mediated adverse effect of heparin therapy which is classified into two subtypes, hit i which is non-immune, spontaneously reversible thrombocytopenia and; hit ii which is an autoimmune-mediated adverse effect of heparin therapy. in this case report, we described a 65-year old male patient with hit ii after coronary artery bypass grafting. ...

This paper focuses on molecular absorption noise caused by molecular absorption in the higher frequency bands, such as THz band (0.1–10 THz). This transmission induced noise has been predicted to exist in the THz band, since the conservation of energy requires the conservation of the absorbed energy in the medium. There exist multiple models for the molecular absorption noise. Most of them focu...

We hypothesized that the function of duodenocyte apical membrane acid-base transporters are essential for H(+) absorption from the lumen. We thus examined the effect of inhibition of Na(+)/H(+) exchanger-3 (NHE3), cystic fibrosis transmembrane regulator (CFTR), or apical anion exchangers on transmucosal CO(2) diffusion and HCO(3)(-) secretion in rat duodenum. Duodena were perfused with a pH 6.4...

Coupling absorption and laser-induced incandescence measurements to retrieve energy band gap, wavelength-dependent absolute values of the refractive index function carbon nanoparticles sampled from different heights in flame.

the role of blood transfusion as a cause of induced malaria is a known fact, and an increase in this condition has already observed in iran mainly due to the increase in blood transfusions. among cases in whom the onset and course of the disease were followed, it was observed that fever and other symptoms of malaria usually appear about 6 weeks alter the transfusion and appear mainly among pati...