during the past decade, natural plant products as environmentally safe option have received attention for controlling phytopathogenic diseases. investigation of plants containing natural antimicrobial metabolites for plant protection has been recognized as a desirable method of disease control. the fungus fusarium oxysporum causes diseases such as root rot, damping off and fusarium wilt and it ...

Abstract: The major effects of cylindrical and row trenched cooling holes with angles alpha=30, beta=0, alpha=40, beta=0 alpha=50, at BR=3.18 on the effectiveness film near combustor end wall surface is an important subject to study in detail. In current study, researchers used a FLUENT package 16/11 simulate 3-D model Pratt Whitney gas turbine engine. this research, RNG turbulence K-ε was anal...

In strained mechanical resonators, the concurrence of tensile stress and geometric nonlinearity dramatically reduces dissipation. This phenomenon, called dissipation dilution, is employed in mirror suspensions gravitational-wave interferometers at nanoscale, where soft clamping strain engineering have allowed extremely high quality factors. However, these techniques so far been applied only to ...

objective: this study designed to test the antibacterial potency of enrofloxacin (enr) and essential oils from zataria multiflora boiss (zeo) and trachyspermum copticum (teo)on aeromonas hydrophila. material and methods: the antibacterial potency of test compounds was determined by several methods including the inhibition zone diameter determination, microbroth dilution method and colorimetric ...

helicobacter pylori is the causative agent of gastritis and peptic ulcer disease. eradication of h. pylori is hard to achieve and often require multiple antibiotics regimens. these regimens are quite expensive and have substantial side effects. licorice is a traditional drug which is frequently used for gastric discomforts in iran. the susceptibility of h. pylori to the extract of licorice has ...

the oxidation of ferrous iron (fe2+) in solution using acidithiobacillus ferrooxidans has industrial applications exclusively in the regeneration of ferric iron (fe3+) as an oxidizing agent for the removal of hydrogen sulfide from waste gases, desulfurization of coal, leaching of non-ferrous metallic sulfides and treatment of acid mine drainage. the aim of this investigation was to increase the...

Production planning in mineral exploitation should be undertaken to maximize exploited ore at a minimum unplanned dilution. Unplanned dilution reduction is among the ways to enhance the quality of products, and hence, reduce the associated costs, resulting in a higher profit. In this way, firstly, all the parameters contributing to unplanned dilution in underground stopes and specifically the c...

Superconducting circuit testing and materials loss characterization requires robust reliable methods for the extraction of internal coupling quality factors microwave resonators. A common method, imposed by limitations on device design or experimental configuration, is single-port reflection geometry, i.e. reflection-mode. However, impedance mismatches in cryogenic systems must be accounted thr...

A model of two microbial species in a chemostat competing for single resource the presence an internal inhibitor is considered. The four-dimensional system ordinary differential equations. Using general growth rate functions species, we give complete analysis existence and local stability all steady states. We describe behavior with respect to operating parameters represented by dilution input ...