The impact of preozonation and filter contact time (depth) on microbial communities was examined in drinking water biofilters treating Ohio River water which had undergone conventional treatment (coagulation, flocculation, sedimentation) or solutions of natural organic matter isolated from groundwater (both ozonated and nonozonated). With respect to filter depth, compared to filters treating no...

Swine manure slurries were ozonated at a dosage of 1 g/L and tested for their toxicity to the house fly (Musca domestica). The observed toxicity of ozonated swine manure was consistent and independent of origin of the swine manure. A dose (dilution) response curve was performed. A 50% dilution in the ozonated swine manure slurry resulted in 90% reduction in toxicity. Neither the synthetic nor o...

This work evaluated the microbiological and physicochemical quality of Minas Frescal cheese sanitized with ozonated water at concentration of 2 mg.L-1 for 1 or 2 minutes. No counts of Enterobacteriaceae, Staphylococcus sp. and total and thermotolerants coliforms were found in the samples. Additionally, significant microbial reductions were observed for ozonated samples and the lowest counts wer...

The water quality of lakes, rivers and streams associated with metropolitan areas is declining from increased inputs of urban runoff that contain polycyclic aromatic hydrocarbons (PAHs). Our objective was to transform and mineralize PAHs in runoff using a combined chemical and biological approach. Using (14)C-labeled phenanthrene, (14)C-benzo(a)pyrene and a mixture of 16 PAHs, we found that ozo...

mT7 medium performed no better than m-Endo medium in enumerating cells of Escherichia coli and Citrobacter freundii exposed to ozone. Also, there was no difference in the plate count of heterotrophic bacteria in ozonated raw water determined on modified Henrici agar or R2A agar. Statistically significant differences were seen between bacteria and the type of water in which they were suspended d...

To date, KEK has developed cleaning techniques for superconducting niobium RF cavities. These include: electro-polishing (EP), buffered chemical polishing (BCP) barrel polishing (BP), high pressure rinsing (HPR), megasonic ]lot water rinsing, degassing water, ozonated water cleaning, waste water treatment, and so oil. In this paper, we present findings from electro-poloishing of cavities, which...

in this study,the effect of ozonated water(0.2, 0.5, and 1 ppm) with different exposure times (5,10, and 15 min) for control of staphylococcus aureus , escherichia coli and total counts in poultry carcass, on chiller water in slaughter house were investigated. for this purpose, control samples passed chiller water(without ozone) for (5,10, and 15 min) .other examples also treated (5, 10 , and 1...

ozone is a triatomic molecule consisting of three oxygen atoms. it is applied to oral tissues in the forms of ozonated water, ozonated olive oil and oxygen/ozone gas. this paper presents a brief review on the chemistry of ozone as well as its medical and dental applications focusing on its use in endodontics. ozone’s antimicrobial activity, its effect on dentin bonding, toxicity and contra-indi...

Alfalfa sprouts contaminated with Escherichia coli O157:H7 and Salmonella have been implicated in a number of foodborne disease outbreaks in recent years. Seeds are attributed to be the main source of contamination for sprouts. Data from studies on the treatment of E. coli O157:H7 inoculated alfalfa seeds with ozonated and electrolyzed oxidizing (EO) water were used to develop models for predic...

Purpose: Evaluating effects of Nd:YAG-laser, Er:YAG-laser, chlorhexidine and ozonated water application which is used for purpose antibacterial effects, on repair bond strength silorane based composite. Materials Methods: 100 cavities (2 mm deep, 3 diameter) prepared in acrylic blocks were filled with composite subjected thermal cycle divided into 5 groups (N=20). Group 1:Chlorhexidine; 2:Ozona...