Photodynamic inactivation (PDI) is a process that uses photosensitizing substances to produce reactive oxygen species. This achieved by exposing photosensitizers specific wavelengths of light and causing oxidative damage in cells. sterilization technique commonly utilized has been extensively investigated owing its environmentally friendly inert characteristics. In this study, erythrosine was s...

Properly managed biopiles can be used for slaughterhouse-residual degradation and bacterial pathogen inactivation, which otherwise represent a major health risk in the environment. Biopiles were used to dispose of slaughterhouse-residuals and determine the occurrence and persistence patterns of indicators of pathogenic bacteria. The indicator bacteria included the family Enterobacteriaceae, tot...

The efficacy of hydrodynamic pressure (HDP) treatment for inactivation of Escherichia coli O157:H7 in blade-tenderized beef steaks was studied. Beef steaks (N = 48) were inoculated with a five-strain cocktail of Escherichia coli O157:H7 and treated with blade tenderization (BT), HDP or a combination of BT followed by HDP (BTH). Control and treated steaks were cooked to 54.4C (undercooked), 62.8...

Replication forks arrested by inactivation of the main Escherichia coli DNA polymerase (polymerase III) are reversed by the annealing of newly synthesized leading- and lagging-strand ends. Reversed forks are reset by the action of RecBC on the DNA double-strand end, and in the absence of RecBC chromosomes are linearized by the Holliday junction resolvase RuvABC. We report here that the UvrD hel...

INTRODUCTION The Cu polyester thin-sputtered layers on textile fabrics show an acceptable bacterial inactivation kinetics using sputtering methods. MATERIALS AND METHODS Direct current magnetron sputtering (DCMS) for 40 s of Cu on cotton inactivated Escherichia coli within 30 min under visible light and within 120 min in the dark. For a longer DCMS time of 180 s, the Cu content was 0.294% w/w...

In order to understand the microbial inactivation mechanism of high-pressure carbonation (HPC), we examined the changes in the activity of the respiratory chain and DNA damage in Escherichia coli cells. HPC was performed under 1-6 MPa at 30°C for 1 min. The increase in CO2 pressure decreased the number of viable cells of E. coli, intracellular ATP, and intracellular NADH, and increased the numb...

AIMS To develop an anti-microbial filter media using an attached quaternary ammonium compound (QAC) and evaluate its performance under conditions relevant to household drinking water treatment in developing countries. METHODS AND RESULTS Silica sand was coated with dimethyloctadecyl [3-(trimethoxysilyl) propyl] ammonium chloride via covalent silane chemistry. Filter columns packed with coated...

The E. coli inactivation using hydrogen peroxide (H2O2) and cobalt ferrite granulated catalyst was investigated in a fixed-bed flow reactor. CoFe2O4 synthesized by the co-precipitation method, granulated, annealed at 1150°C. X-ray diffraction analysis used to identify crystal structure of catalyst. demonstrates good catalytic activity for bacteria presence H2O2. An increase concentration increa...

background and objectives: pathogen reduction technologies are among methods to eliminate transfusion transmitted infections. mirasol method using riboflavin in combination with ultraviolet rays is one of them. the aims of this study were to investigate the effectiveness of mirasol method to inactivate some model pathogens as well as examination of the sensitivity of plasma proteins after treat...

Preharvest control strategies, to reduce or eliminate pathogenic bacteria in leafy vegetables that may be consumed raw, provide additional food safety protection and shelf life quality extension beyond what is possible achieve with postharvest sanitation alone. The aim of this study was characterize the efficacy effect contact time electrolyzed water (e-water), 1-bromo-3-chloro-5-dimethylhydant...