the aim of this study was to compare invasive and non-invasive strains of shigella flexneri isolated from tehran by a 120 kda protein band by sds-page, electron microscopy of cell culture and congo red dye methods. methods: s. flexneri strains were isolated by standard bacterial methods from fecal specimens of children attending to the 3 children’s hospitals. phenotype analysis for screening vi...

The photoinduced electron transfer between either cationic 5,50-dichloro-3,30,9-triethylthiacarbocyanine (1) or a structurally similar anionic dye (2) and appropriate donors, e.g. ascorbic acid, and acceptors, e.g. methyl viologen, was studied by ns-laser photolysis. In aqueous solution the dyes in the ground state are present as an equilibrated mixture of dimers and monomers, whereas the tripl...

Changes in the chemical structures of morphine and codeine in the presence of hydrogen peroxide, a major component of hair dye and decolorant treatments, were examined with high-performance liquid chromatography/mass spectrometry (LC/MS). A mixture of morphine and hydrogen peroxide solution, after incubation at 39 degrees C for 24 h, produced two reaction products (hydroxymorphines). When codei...

A dynamic combinatorial library of metal-dye complexes was obtained by reacting aqueous solutions of the dyes Methyl Calcein Blue, Arsenazo I, and Xylenol Orange with CuCl(2) and NiCl(2). The mixture gave a characteristic UV-Vis response upon addition of the peptide hormones angiotensin I and angiotensin II. This allowed distinguishing pure samples of peptide hormones from mixtures. The discrim...

A mixture of the Pd(II) complex [Pd(NO(3))(2)(bipy)] (bipy = 2,2'-bipyridine) and the fluorescent dye Methylcalcein blue (MCB) constitutes a chemosensing ensemble which can be used for the detection of pyrophosphate (PPi) by fluorescence spectroscopy. The sensor operates in buffered aqueous solution at neutral pH, and allows sensing PPi at low to mid micromolar concentrations with very good sel...

To reduce costs, a low-cost thin-film solar cell technique known as the Dye Sensitized Solar Cell (DSSC)/Gratzel emerged. DSSC is an easy to manufacture photovoltaic but lacks its stability and higher conversion efficiency factors. In this paper, overcome these challenges keep cost factor on trial, photogalvanic was also studied using H-shaped glass tube. Both cells were dyes Erythrosin B, Tart...

Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis is a technique that is used to separate proteins in a mixture for the purpose of identifying them individually. Proteins coated in SDS (which gives them a negative charge), are pulled through a thin gel by an electrical current. They separate on the gel based on size--the larger the protein, the slower it moves. Proteins can be stained w...

Background: Thoracic paravertebral block (TPVB) entails injecting a local anesthetic inside the thoracic space (TPVS). Loss of resistance to air injection (air-LOR) was first technique described in humans locate TPVS. To date, no study has investigated spread any substance after into TPVS using air-LOR nor cranial and caudal limits space.
 Aim: identify boundaries TPVS, determine whether i...

In this paper, we intend to present a classical method of extraction and analysis betanin from Algerian red beetroot, know the efficiency binary mixture (Ethanol-Water) on extraction. Also, content extract obtained using optical spectroscopic methods. This dye is natural pigment with high antioxidant power widely used as dye. addition, bioavailability reinforces its potential for future therape...

Wastewaters of several industries such as textile, leather or dye etc., contain dangerous and toxic compounds, even some which are potential carcinogenics. Considering the volume composition, wastewaters textile industry have much more polluting characteristics compared to other industries. Although treatment processes must definitely be implemented in point environment living organisms, many f...