quantitative structure-activity relationship (qsar) studies of a series of substituted 3-hydroxy-pyridine-4-ones and 3-hydroxy-pyran-4-ones as antibacterial and antifungal agents against a variety of microorganisms were performed. multiple linear regression approach was used as variable selection method. the antimicrobial activities of these compounds against staphylococcus aureus, aspergilus n...

The purpose of this study is to carry out comparative in vitro study of bactericidal effect of antimicrobial drugs used in modern endodontics against some basic microbial agents of periodontitis. Using the agar diffusion method (experiment with sterilized disks and wells) antimicrobial effect of five antimicrobial agents used in endodontics is evaluated: Rockle, Cresophene, I2/KI, Cupral, Ca(OH...

vinca major, minor and rosea are three species of vinca genus and apocynaceae family. the present work is to investigate antimicrobial effects of these plants against candida albicans, pseudomonas aeroginosa and staphylococus aureus. alkaloids from leaf extracts had a better effect on pseudomonas aeroginosa than alkoloids from stem and root. alkaloids from stem extracts were more effective than...

hyssopus of­ficinalis l. is one of the most important medicinal plants. medicinal herbs are contaminated by microorganisms. conventional methods for reducing of microbial loads such as ethylene oxide, propylene oxide and also use of steam are hazardous and instead, non-thermal process such as microwave and gamma radiation are being used widely in order to eliminate the microbial contaminations ...

recently, the effects of antimicrobial activity of silver nanoparticles was considered by researcher because of bacterial resistance to antimicrobial agents in chemical.the aim of this study was to evaluate the antimicrobial activity of the gold nanoparticles on escherichia coli. gold nanoparticles are chemically synthesized. standard strain of e. coli was cultured in a nutrient broth. minimum ...

the dorsal skin of the iranian frog, rana ridibanda, is associated with numerous prominent granular glands which extract their secretions in the response to stressor or invading pathogens .the secretions have broad spectrum antimicrobial effects. in this research the effect of antimicrobial skin secretions from iranian frog (rana ridibanda) has been examined against gram positive methycillin re...

The present study investigated the effect of sumac (SWE) and Rosemary water extracts (RWE) on microbial growth in ground beef meat during refrigerated storage. The meat samples were explored for changes in TVC, E.coli (0157:H7) and S.aureus populations. Antimicrobial effectiveness of extracts was more pronounced against Gram-positive strain compared with Gram-negative strain. Antimicrobial impa...

The present study investigated the effect of sumac (SWE) and rosemary water extracts (RWE) on microbial growth in ground beef meat during refrigerated storage. The meat samples were explored for changes in TVC, E. coli (0157:H7) and S. aureus populations. Antimicrobial effectiveness of extracts was more pronounced against gram-positive strain compared with gram-negative strain...