Influence of Ni2+ on urease activity produced by biofilms of Arthrobacter oxydans 1388
نویسندگان
چکیده
New TiO2-based hybrid materials composed of an organic polymer, cellulose acetate butyrate and copolymer of acrylonitrile acrylamide (AN + AA) were prepared. The effectiveness of immobilization of microbial strain Arthrobacter oxydans 1388 on the newly synthesized hybrid membranes was investigated by biochemical methods. The obtained results revealed that the matrix more suitable for biofilm formation was composed of organic polymers without a metal component in the membrane composition. The influence of Ni2+ on urease activity produced by biofilms was investigated. The experimental results demonstrated that 2 mg L-1 concentration of Ni2+ in the nutrient medium is more appropriate for biofilm proliferation.
منابع مشابه
Antimicrobial Activity of Bulgarian Products and Their Extracts Containing Bioactive Components
Phytoncides are organic compounds, produced by plants in order to protect them from different microorganisms. Over the years a number of plants and their extracts are subjected to investigation of their antibacterial properties. The increase in the number of side reactions caused by antibiotics, and other drugs used in medical practice, turned back the attention of many scientists to studies of...
متن کاملThe Effect of Biosurfactant of Saccharomyces Cerevisiae on Biofilms Produced by Staphylococcus Aureus, Epidermidis and Saprophyticus: A Laboratory Study
Background and Objectives: Biosurfactants are amphiphilic molecules produced by microorganisms that due to surfactant activity, have several applications in different industries such as cleaning, emulsification, foaming and dispersion. The aim of this study was to investigate the effect of biosurfactant extracted from saccharomycess cerevisiae on biofilm formation of staphylococcus aureus (PTC...
متن کاملAn intact urease assembly pathway is required to compete with NikR for nickel ions in Helicobacter pylori.
We examined the effects of urease and hydrogenase assembly gene deletions on NikR activation in H. pylori strains 26695 and G27. The loss of any component of urease assembly increased NikR activity under Ni2+-limiting conditions, as measured by reduced transcript levels and 63Ni accumulation. Additionally, SlyD functioned in urease assembly in strain 26695.
متن کاملInvestigation of the effect of biosurfactant of Bacillus subtilis against Staphylococcus strains biofilms
Background: Biosurfactants are compounds that are produced by different microorganisms and have an emulsifying property. This study aimed to investigate extractive biosurfactant from bacillus subtilis (PTCC1720) against the biofilms of Staphylococcus aureus (PTCC 1112), Staphylococcus saprophyticus (PTCC 1440) and Staphylococcus epidermidis (PTCC 1435). Materials and Methods: This study was con...
متن کاملBiotreatment of ammonia from air by an immobilized Arthrobacter oxydans CH8 biofilter.
A heterotrophic Arthrobacter oxydans CH8 that was capable of removing NH3 from NH3 containing gas was isolated from livestock farming wastewater. The A. oxydans CH8 was immobilized with calcium alginate packed into filter column. Metered NH3-containing gas was partially humidified and passed through the glass column. Extensive tests including the removal characteristics, the removal efficiencie...
متن کامل