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Vapor-Form™ for Fighting Pathogens

6/11/2020

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Received new laser cut lids with multiple ports for holding up to 12 filaments. Photo shows 6 filament configuration. 
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Vapor-Form™ for Fighting Pathogens

6/8/2020

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The straight 3% peroxide vapors, emitted from a single filament, essentially ruined the hygrometer in less than two weeks. This suggests the vapor strength is considerable and reinforces the likelihood that even a low concentration of peroxide is capable of disinfecting pathogens.  
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Vapor-Form™ for Fighting Pathogens

5/4/2020

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Experimenting with various concentrations of Hydrogen Peroxide between 3% and 12% to observe behavior relative to humidity. The typical off-the-shelf concentration of peroxide is 3%, which is widely available in stores. 12% is the maximum concentration used in this testing, as this is likely the highest that's available online and still fairly safe for handling by homeowners. In the electronics industry, we routinely use ~30% concentrations which I'd consider unsafe for handling by most people.  

What I'm observing is that peroxide emits vapor, similar to water vapor emitted from a water source. The redesign to have up to 12 filaments for each device will be tested when the new lids arrive.  

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Vapor-Form™ for Fighting Pathogens

4/26/2020

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Tested high concentration (shock) liquid chlorine and observed the same behavior as bleach, where after only ~12 hours the yellowish liquid turned clear and emitted little odor. More research is showing chlorine concentration decays in a matter of hours, so it does not appear chlorine is likely to work as a vapor source. Further, in rinsing the reservoir I observed the lid separate from the tray, indicating the chlorine liquid and/or vapor was likely attacking/etching the bonding. 

For this application, the requirement is have vapor emission for extended periods of time. Plan is to assess vapors emitted from recognized coronavirus disinfectants. The EPA published a list of 392 different "Products with Emerging Viral Pathogens AND Human Coronavirus claims for use against SARS-CoV-2." See attached link (below). Of particular note is hydrogen peroxide liquid and vapor, used in sterilization and disinfection of hospital waste and devices. Origineer Design has been working with hydrogen peroxide for some time, as a additive for controlling mold and mildew formation in Musik Tent and HumiForm reservoirs. A few cap-fulls of 3% peroxide, has been found to be very effective in preventing pathogens in Origineer Design product reservoirs and the associated filaments. These are chronicled in the Musik Tent blog at https://www.origineer.com/blog1. 

To evaluate HumiForm in generating peroxide vapor, it should be relatively simple to measure humidity levels as an indicator of the emission rate. We still need lab assistance in measuring the effectiveness of vapors at these emission rates in disinfecting/sterilizing pathogens.  
EPA: Products with Emerging Viral Pathogens AND Human Coronavirus
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Vapor-Form™ for Fighting Pathogens

4/22/2020

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Observed today that the yellowish tint of the bleach has changed to completely clear, and the vapors are barely noticeable. I was not expecting such a rapid oxidizing by the surrounding air. Bleach appears to decompose too rapidly to be effective as a vapor source. Transitioning to concentrated liquid chlorine.
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Vapor-Form™ for Fighting Pathogens

4/21/2020

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Testing at 100% strength Germicidal Bleach (Sodium Hypochlorite, Solution, 5% available chlorine) in shower to see how it might control mold growth. 

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Vapor-Form™ for Fighting Pathogens

4/20/2020

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Redesigning filament configuration to increase emission by more than 1000%, if needed, from the original single filament to 12 filaments. 

The SDS (safety data sheet) for germicidal bleach, and for the disinfecting Clorox, indicates a chemical name, Sodium Hypochlorite (NaOCl), at 5% to 10% weight. The online SDS is available at https://www.thecloroxcompany.com/wp-content/uploads/2020/03/Clorox-Germicidal-Bleach1-Bilingual-1.pdf. In one reference, it appears the manufacturer of CAS RN, 7681-52-9, Sodium Hypochlorite is actually Spectrum Chemical Mfg. Corp, and their SDS (https://www.spectrumchemical.com/MSDS/S1669_AGHS.pdf) indicates Sodium Hypochlorite, Solution, 5% available chlorine.  

In researching VOC's (volatile organic compounds) resulting from bleach, it seems Chloroform (CHCl₃) and Carbon Tetrachloride (CCl4​) are the most prevalent. I'm researching various portable monitors for testing chlorine concentration. 
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Vapor-Form™ for Fighting Pathogens

4/19/2020

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Have requested assistance today from The Clorox Company:

I may have developed an immediate and elegant solution for disinfecting common household items, such as mail, packages, shoes, newspapers, face masks and gloves, using Clorox Germicidal Bleach. This is done by adapting my patented cigar humidifier product to emit dilute chlorine vapor. The new product, dubbed “ChloroCloud™,” allows the concentration of chlorine vapor emitted to be modulated by varying the dilution of water and bleach. As examples, I could envision this device being placed inside a mailbox to disinfect mail, or inside a storage bin to disinfect gloves, masks, shoes and other items.
 
Would the Clorox Company have interest in collaborating? It would be very helpful to have Clorox’s assistance in identifying the optimum concentration that’s both safe and effective, measuring vapor emission, and providing testing. Please visit www.origineer.com/blog for additional information and give me a call if there is interest. Thank you.



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Vapor-Form™ for Fighting Pathogens

4/17/2020

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Considering goals for testing once lab is identified. The infectious dose (amount required for someone to become infected) for COVID-19 does not appear to be understand at this time. It's expected to be a relatively low value due to the virus being highly contagious. Initial thoughts and concern are that we'll need to test chlorine vapors ability to diffuse/permeate into or through items being sterilized.

Some possible designed tests and related questions:
Are COVID-19 sample available? Other viruses (Marburg, Ebola, Rabies, HIV, Smallpox, Hantavirus, Flu, Dengue, Rotavirus, SARS-CoV, SARS-CoV-02, MERS-CoV)?
  • Perform initial screening tests with following factors. levels and responses.
    • Factor 1 = Test chamber volume. Level 1 = 36 quarts. *
    • Factor 2 = Virus culture type. Level 1 = COVID-19.
    • Factor 3 = Virus culture concentration. Level 1 = TBD plaque-forming units (PFU) per milliliter
    • Factor 4 = Ratio of water to bleach. Level 1 = 1:1 and Level 2 = 10:1
    • Factor 5 = Exposure Time. Level 1 = 5 minutes and Level 2 = 60 minutes
    • Response = Delta  PFU per milliliter*
* Located a 36 qt Weathertight Tote at the Container Store (SKU#: 10067984), that has similar volume to standard T3 and C3 Style Size mailboxes. 
  • Design experiment to test viral culture on substrates, such as paper, plastic, rubber, metal, cloth, etc, in test chamber with ChloroCloud. Need to specify substrates  (i.e., materials, thickness, porosity), exposure time(s), and vapor concentration(s). Include viral culture in petri-dish as a control? Place viral culture control sample in second test chamber without ChloroCloud? 
  • Place viral culture on paper into test chamber, and cover with second layer sheets of paper with viral culture. Repeat for stack. How many sheets are practical? Repeat for other substrates?
  • Should we eliminate light during testing, to simulate ChloroCloud being placed inside a mailbox? 
  • Other considerations?
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Vapor-Form™ for Fighting Pathogens

4/14/2020

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Photo below shows common items inside a storage bin with ChloroCloud device emitting dilute chlorine vapor. We are investigating labs capable of performing viral cultures to aid in investigating ChloroCloud's capabilities in disinfecting pathogens.  I reached out to the Director at the Center for Infectious Disease Dynamics (CIDD) at Penn State, and also to the President of Lab Corp, about the possibility of evaluating ChloroCloud's capability in eliminating pathogens. 
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    Author

    Damon DeBusk is a multi-patented product designer, process and quality engineer, project manager, author, and inventor of Musik Tent Instrument Humidors and HumiForm Cigar Humidifiers. He has decades of experience with HCl gas and liquid chlorides, and was co-inventor for U.S. Patent 5,599,425,  Predecomposition of organic chlorides for silicon processing, a commercial product sold by Air Products under the trade name, Trans-LC, and authored numerous technical publications .

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  • Home
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