introduction: pseudomonas aeruginosa is a gram-negative bacterium that considered as important opportunistic human pathogen. one of the mechanisms that help bacteria to tolerate survival in adverse conditions and resistance to antibiotics is biofilm formation through quorum sensing (qs) signals and toxin-antitoxin (ta) systems. qs and ta are two systems that have important roles in biofilm form...

conclusions the analysis recommended that ta genes are prevalent in clinical isolates of e. coli strains. the analysis revealed that hipba ta system is associated with biofilm formation. results the results of the analysis revealed that 107 e. coli isolates were potent for biofilm formation by cra. the findings by microtiter plates showed that 102 e. coli isolates were biofilm producers. the re...

conclusions according to the average of wqi index, quality of water was good in station number one, medium in station number two, and bad in the rest of stations. according to the wilcox index, qualities of water in third station were medium and in the rest were good. results by using wqi, the best water quality was reported in station number one with the scalar quantity of 71.11 (water with be...

the counseling system is the one of the basis on which all social and political affairs are presented and investigated through public and political consultation in the form of discussions and free conversations. in the counseling system, it is the public wisdom and agreement that leads to the selection and determination of rulers, social and political constructs and institutions, codifying and ...

in the linear system ax = b the points x are sometimes constrained to lie in a given subspace s of column space of a. drazin inverse for any singular or nonsingular matrix, exist and is unique. in this paper, the singular consistent or inconsistent constrained linear systems are introduced and the effect of drazin inverse in solving such systems is investigated. constrained linear system arise ...

extended abstract: introduction the complexity of the phenomenon of time and its meaning has always been considered an obstacle to understanding the nature of time. time is an important phenomenon in detailed discussions about its nature, particularly in philosophy and physics filed. sun, earth and rotations it should be considered a major factor in the definition of the concept of astronomical...

this paper reviews the essence of effective governance and importance of a multi-sectoral approach in generating health systems response to hiv/aids. this comprehensive approach highlights the importance of integrating reproductive sexual health programs and hiv prevention services, including peer education, life skills, and voluntary counseling and testing (vct), for prevention of mother–to-ch...

the present study was conducted to investigate qualitative and quantitative aspects of irrigated wheat production in three major farming systems i.e. peasant, commercial and cooperative systems in kordestan province. accordingly, seven basic hypotheses were tested. the data were drawn from individual interviews with 360 farmers who planted wheat in 2004-2005. the sample was selected using multi...