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17/01/2023
Assemblea generale SIOOT/ASOO 2022-2023

Abbiamo il piacere di comunicare laCONVOCAZIONE ASSEMBLEA GENERALE SIOOT /ASOO ANNO 2022-2023 che si terrà presso la storica sede SIOOT sabato 28 gennaio 2023 alle ore 10.00. L’assemblea è riservata agli associati in regola con la quota annuale già versata per l’anno 2023 SIOOT o ASOO   L’Assemblea annuale ha una grandissima [ continua... ]

20/10/2022
INACTIVATION OF HEPATITIS A VIRUS ANDMS2 BY OZONE AND OZONE-HYDROGENPEROXIDE IN BUFFERED WATER

Disinfection of drinking water by chlorine is a primary means of preventing thetransmission of waterborne disease, and its efficacy is well-established. Thecomparative inactivation of highly purified hepatitis A virus (HAV) and MS2 by 1mg water/L, 2.0 and 0.4 mg ozone/L plus 0.6, 1.0 or 1.6 mg hydrogen peroxide/Lwas determined at temperatures from [ continua... ]

20/10/2022
Comparison of Ozone Inactivation, in Flowing Water, of Hepatitis A Virus, Poliovirus 1, and Indicator Organisms

In steadily flowing water at 20°C and pH 7, five organisms had the following order of resistance to ozone (at constant levels of ozone): poliovirus 1 (PV1) < Escherichia coli < hepatitis A virus (HAV) < Legioneila pneumophila serogroup 6 < Bacillus subtilis spores. The tests were repeated at 10°C with HAV, PV1, and E. coli. Ozone [ continua... ]

20/10/2022
Inactivation Kinetics of Viruses and Bacteria in Water by Use of Ozone

Although chlorine is the most widely used agent for disinfecting water, its use presents problems because of its relatively low effectiveness as a virucide and because of potentially toxic compounds that may be formed. Ozone is shown to have a much more rapid virucidal effect and may soon find its place in treating water and wastewater, alone or in [ continua... ]

20/10/2022
Effects of ozone treatment on the infectivity ofhepatitis A virus

The inactivation of a large-focus-forming variant of hepatitis A virus (HM-175) by ozone wasinvestigated. Experiments using mainly single-particle virus preparations suspended in phosphate-carbonate buffer were conducted over a range of pH levels (6-8) at 4 degrees C. Viral enumerationsinvolved the use of a radioimmunofocus assay. While some [ continua... ]

20/10/2022
THE MECHANISM OF OZONE INACTIVATION OF WATER BORNE VIRUSES

This work was supported in part by funds provided by the United States Department of Interior, Office of Water Research and Technology, as authorized under the Water Resources Research Act of 1964 as amended, Project Number B-013-ME. The authors also acknowledge contributions of the late David M. Gentile, who initiated this work while a Ph.D. [ continua... ]

20/10/2022
Inactivation of Human and Simian Rotaviruses by Ozone

The inactivation of simian rotavirus SA-11 and human rotavirus type 2 (Wa) by ozone was compared at 4°C by using single-particle virus stocks. Although the human strain was clearly more sensitive, both virus types were rapidly inactivated by ozone concentrations of 0.25 mg/liter or greater at all pH levels tested. Comparison of the virucidal [ continua... ]

20/10/2022
Reduction of influenza virus pathogenesis byexposure to 0.5 ppm ozone

Continuous exposure to 0.5 ppm ozone during the course of murine influenza A/PR8/34 virusinfection reduced the severity of the disease as quantitated by histologic (morphometric), biochemical(serum albumin in lavage fluid), and gravimetric (lung wt/dry weight ratios) parameters of lung injury.The ozone-mediated abatement of the lung injury was [ continua... ]

20/10/2022
Comparative Inactivation of Poliovirus Type 3 and MS2 Coliphage in Demand-Free Phosphate Buffer by Using Ozone

MS2 coliphage (ATCC 15597-Bl) has been proposed by the U.S. Environmental Protection Agency as a surrogate for enteric viruses to determine the engineering requirements of chemical disinfection systems on the basis of previous experience with chlorine. The objective of this study was to determine whether MS2 coliphage was a suitable indicator for [ continua... ]

20/10/2022
Microbiological aspects of ozone: bactericidal activity and antibiotic/antimicrobial resistance in bacterial strains treated with ozone

Antimicrobial resistance is one of the most complex global health challenges today. The world has long ignored warnings that antibiotics and other medicines are losing their effectiveness after decades of overuse and misuse in human medicine, animal health and agriculture. Common illnesses like pneumonia, postoperative infections, diarrhoeal and [ continua... ]

20/10/2022
Ozonization of blood for the therapy of viral diseases and immunodeficiencies. A hypothesis

In the last 3 decades major autohemotherapy after exposure to ozone has been used in Europe inuncontrolled trials carried out in patients with many illnesses, particularly chronic viral diseases andneoplasms. It appears that the treatment may activate the host's immune system by inducing theproduction of immunoactive cytokines and it may now be [ continua... ]

20/10/2022
Effects of ozone treatment on the infectivity of hepatitis A virus - Canadian Journal of microbiology

The inactivation of a large-focus-forming variant of hepatitis A virus (HM-175) by ozone wasinvestigated. Experiments using mainly single-particle virus preparations suspended in phosphate-carbonate buffer were conducted over a range of pH levels (6-8) at 4 degrees C. Viral enumerationsinvolved the use of a radioimmunofocus assay. While some [ continua... ]

20/10/2022
Liquid-Phase Study of Ozone inactivation of Venezuelan of Equine Encephalomyelitis Virus

Ozone, in a liquid-phase application, was evaluated as a residue-free viral inactivant that may be suitable for use in an arboviral research laboratory. Commonly used sterilizing agents may leave trace residues, be flammable or explosive, and require lengthy periods for gases or residues to dissipate after decontamination of equipment such as [ continua... ]

20/10/2022
Inactivation of Human Immunodeficency Virus Type 1 by Ozone in vitro

A device was designed to deliver a constant source of given concentrations of ozone to fluids containing human immunodeficiency virus type 1 (HIV-1). Ozone was found to inactivate HIV-1 virions in a dose-dependent manner. Greater than 11 log inactivation was achieved within 2 hours at a concentration of 1,200 ppm ozone. Similar concentrations of [ continua... ]

20/10/2022
Plasmas ozone inactivation of Legionella indeionized water and wastewater

The results show that ozone concentration determination using ultraviolet spectrophotometry (UV-2450) at 258 nm is easier than using indigo method at 600 nm. A strong linear relationship was foundbetween purge time and Oconcentration in deionized water. Ozone concentration can be predictedin deionized water. A higher O flow rate or lower [ continua... ]