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Portable Decontamination and Sterilization System--slide presentation
Portable Decontamination and Sterilization System--slide presentation
****!!!! "Adding salt to the aqueous solution used to produce sterilant allows humidity control, which improves kill of bacterial spores" "• Indicator to show ClO2 is present: • Indicator is printed on or attached to inside of pouch • Changes color on exposure to ClO2" "Reversible indicator on outside of sterilizer bag to show when unit is too cold and should be warmed for correct functioning" "To eliminate bacterial spores, it is highly desirable to control the humidity during sterilization to 70 to 95%, preferably 90 to 95%. Adding NaCl to the NaClO2 solution lowers the humidity of the gases produced from 100% to the desired range."
·apps.dtic.mil·
Portable Decontamination and Sterilization System--slide presentation
The Role of Water Solubility and Diffusion Coefficient in Air of Chlorine Dioxide Gas during Surface Decontamination and Compatibility of Selected Plastics and Elastomers
The Role of Water Solubility and Diffusion Coefficient in Air of Chlorine Dioxide Gas during Surface Decontamination and Compatibility of Selected Plastics and Elastomers
****!!!!****!!!!**** {Includes data table of studies of gas and liquid against specific pathogens on food} "ClO2 disinfects by oxidation through the one-electron transfer mechanism, resulting in a reduction to ClO2–...The inactivation may be reached by allowing permeability of the cell membrane by changing the configuration of lipids and protein which involve the oxidation of amino acids by the gas. The second option is due to the reaction with nucleic acid and/or protein structures... However, some research showed degradation in viral RNA, inducing genotoxicity or discontinuing replication of genome information." "At higher relative humidity, a greater reduction of pathogen population was reported. This might be explained due to the increment of the pores’ sizes in the bacteria due to swelling at high humidity, which allow penetration of the ClO2 molecule into the bacteria." "Gaseous ClO2 showed a negative impact on treated fruits and vegetables through enzymatic browning formation... is related to the deterioration of nutritional quality. However, additional treatments can be added to the gas exposure to inhibit browning..." "negative color change in spinach leaves, which occurred during storage after being exposed even to 50 ppm of gaseous ClO2. Also, treatments with higher concentrations may lead to bleaching of fruits and vegetables" "reaction rate was estimated to be... which is significantly higher than the reaction rate reported by previous researchers ... the chamber used here was stainless steel... likely increased the reaction with the walls, and created minor corrosion" "larger exposure surface area for the water in contact with the gas increased the overall decay rate" "some crevices in equipment could impact the effectiveness of the ClO2 gas treatment due to the time for gas to diffuse into the crevice" "the ClO2 gas concentration is surface area- and water volume-dependent" "Results showed an increase in the reaction rate due to water presence at different water volume and exposure surface area. After 7 days’ exposure at 3000 ppm of ClO2 gas, none of the selected plastics or elastomers showed a significance difference (p0.05) in the hardness value." "excitation wavelengths of ClO2 are near the ultraviolet and visible light... leads to dissociation into ClO + O or Cl + O2" " Further research can also be extended to determine the rate of ClO2 molecules dissolving into water, and the residuals form."
·trace.tennessee.edu·
The Role of Water Solubility and Diffusion Coefficient in Air of Chlorine Dioxide Gas during Surface Decontamination and Compatibility of Selected Plastics and Elastomers