application of atoxigenic strains of aspergillus flavus to reduce aflatoxin levels is the most successful strategy applied in some agricultural crops. the role of ammonium hydroxide for preliminary screening of the competitiveness of atoxigenic a. flavus isolates to interfere with aflatoxin production by highly toxigenic isolates were evaluated. out of 270 a. flavus isolates, 17 were detected a...

In this study, polyamide-aluminum foil-polypropylene (PA-Al-PP) composite films with different orientation status of the PP layer were prepared, and their morphology, tensile, peeling and heat seal behavior were studied. The comparative study of tensile and fracture behaviors of single-layer film of PA, Al and PP, as well as the composite films of PA-Al, PP-Al and PA-Al-PP revealed that in PA-A...

The photoacoustic (PA) technique is one of many techniques for measuring thermal conductivity of thin films. Compared with other techniques for thermal conductivity measurement, the photoacoustic method is relatively simple, yet is able to provide accurate thermal conductivity data for many types of thin films and bulk materials. In this work, the PA measurement in a high frequency range is mad...

Abstract A numerical study of the planar gas expansion under pulsed evaporation into background is carried out. The chosen conditions are typical for nanosecond laser deposition thin films and nanostructure synthesis, with saturated pressure at surface 5.4 MPa 50 500 Pa. problem solved based on direct simulation Monte Carlo method solution BGK model kinetic equation. generally good agreement wa...

TLC screening and Evaluation of antioxidant, antibacterial activity of Onopordon macrocephalum by bioautography methodOnopordon known as scotch thistle is a medicinal plant of the Asteraceae family that is widely distributed in Europe and Asia, also it has many valuable medicinal properties as hypotensive and antitumor. Thin layer chromatography (TLC) is wildly used in natural product ext...

drying properties of high moisture potato slices with initial moisture content of about 4.06 (db) under thin layer fixed, semi fluidized and fluidized bed conditions were studied. drying air temperatures of 40, 50, 60 and 70°c were applied in experiments using a laboratory fluidized bed convective dryer. in order to predict the drying behavior of potato slices, seven thin layer drying models we...

This work aims at studying the potential of modifying surface used polyamide (PA) reverse osmosis (RO) commercial membranes by coatings made renewable and biodegradable polymers, chitosan (CS) polyvinyl alcohol (PVA), filled with Cu-ion-exchange layered AM-4 titanosilicate UZAR-S3 stannosilicate to provide antifouling properties enlarging life time thin-film composite (TFC) membranes. The water...

the primary cilium which is an organelle in nearly every cell in the vertebrate body extends out of the cell surface like an antenna and is known as cell sensor of mechanical and chemical stimuli. in previous numerical simulations, researchers modeled this organelle as a cantilevered beam attached to the cell surface. in the present study, however, we present a novel model that accommodates for...

two dimensional thin layer chromatography on polyamide sheets is a useful method for identification of pth-amino acids which have very close rf-values. the solvent systems described here are particularly effective and have an edge over other solvent systems used for the separation of pth-amino acids. the solvent systems provide a clear separation of all pth-amono acids except lle / leu in a rel...

drying characteristics of quercus were determined experimentally as a function of temperature, air velocity, and variety (quercus persica and quercus libani). in order to estimate and select a suitable drying curve, five different thin layer drying models were fitted to the experimental data. experiments were performed at the air temperatures of 50, 60 and 70°c. at each temperature level, two a...