A photochemical treatment with UV multi-wavelength irradiation was applied to investigate the degradation of saponins mixture obtained from alfalfa leaves. The photo-degradation studied in an aqueous solution at a pH range 4–7 and temperature 20–80 °C. samples were irradiated for 80 min using mid-pressure mercury lamp emission wavelengths between 250 740 nm. dependence absorbed radiation on con...

To evaluate and understand inactivation of HRV under many physical conditions and chemical agents, HRV86 were selected to expose with temperature, ultraviolet light (UV), Sodium hypochlorite, Virkon S, Peracetic acid (PAA), Glutaraldehyde and Ethanolin, respectively. The inactivation of HRV was analyzed by infectivity of the viral strains on the HeLa cells. Our research found the rhinovirus was...

Neisseria gonorrhoeae dihydrofolate reductase undergoes a time-dependent, irreversible inactivation by 2,4-diamino-5-[3,5-dimethoxy-4-(p-bromoacetamidophenoxy)benzyl] pyrimidine. The kinetics of inactivation are consistent with the reversible formation of an enzyme-inhibitor complex followed by covalent binding to the enzyme. The reversible component is competitive with dihydrofolate and has an...

Using gold nanoparticles (AuNPs) on "capillary enzyme-linked immunosorbent assay (ELISA)", we produced highly sensitive and rapid assays, which are the major attributes for point-of-care applications. First, in order to understand the size effect of AuNPs, AuNPs of varying diameters (5 nm, 10 nm, 15 nm, 20 nm, 30 nm, and 50 nm) conjugated with Horseradish Peroxidase (HRP)-labeled anti-C reactiv...

In this study Response Surface Methodology was used to optimize process conditions and to evaluate the effect of ultrasound on quality attributes (antioxidant activity, pH, total soluble solid, turbidity) and the inactivation of Escherichia coli bacteria in carrot juice. Independent variables in this study were temperature (25-50°C), time (20-40 min) and frequency (0-130 kHz). In this study the...

In this study Response Surface Methodology was used to optimize process conditions and to evaluate the effect of ultrasound on quality attributes (antioxidant activity, pH, total soluble solid, turbidity) and the inactivation of Escherichia coli bacteria in carrot juice. Independent variables in this study were temperature (25-50°C), time (20-40 min) and frequency (0-130 kHz). In this study the...

A powerful photoand thermostable, LiF:Fj** color center laser pumped by radiation at 740 nm (alexandrite laser) or at 683 nm (Raman shifted (H2) second harmonic of a Nd:YAG laser) is described. This is the first time an average power as high as —1.4 W and an energy per pulse as high as 1OOmJ, with record real efficiency of 53% (683 nm pumping) and 28% (740 nm pumping) were achieved for a room t...