Engineered water nanostructures (EWNS) and uses thereof

Patent metadata

Field	Value
Publication number	US-11479799-B2
Application number	US-201515511532-A
Country	US
Kind code	B2
Filing date	Sep 16, 2015
Priority date	Sep 16, 2014
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

Various embodiments of the present invention relate to, among other things, systems for generating engineered water nanostructures (EWNS) comprising reactive oxygen species (ROS) and methods for inactivating at least one of viruses, bacteria, bacterial spores, and fungi in or on a wound of a subject in need thereof or on produce by applying EWNS to the wound or to the produce.

First claim

The invention claimed is:

1. A method for inactivating at least one of viruses, bacteria, bacterial spores, and fungi in or on a wound of a subject in need thereof the method comprising:
contacting the wound with engineered water nanostructures (EWNS) comprising reactive oxygen species (ROS) and an electric charge from about 20 to about 100 e − ; wherein the electric charge of the EWNS is an average EWNS electric charge of a sample of EWNS, the average EWNS electric charge is determinable by parallel measurement of the aerosol current and the particle number concentration of the sample of EWNS, and the contacting inactivates the at least one of viruses, bacteria, bacterial spores, and fungi located in or on the wound.

2. The method of claim 1 , wherein the bacteria are at least one of gram-positive and gram-negative bacteria.

3. The method of claim 1 , wherein the method comprises inactivating viruses.

4. The method of claim 1 , wherein the bacteria comprise mycobacteria.

5. The method of claim 1 , wherein the bacteria are selected from the group consisting of Pseudomonas aeruginosa, Pseudomonas spp., Serratia marcescens, Staphylococcus aureus , methicillin-resistant Staphylococcus aureus (MRSA), Group A Streptococci, Group B, Streptococci, Group C Streptococci, Group G Streptococci, vancomycin resistant Enterococci (VRE), and Pseudomonas aeruginosa.

6. The method of claim 5 , wherein the bacteria is Pseudomonas aeruginosa.

7. The method of claim 1 , wherein the subject is a human subject.

8. The method of claim 1 , wherein the wound is contacted with EWNS at an EWNS concentration of about 5,000 to about 500,000 EWNS per mL.

9. The method of claim 8 , wherein the wound s contacted with EWNS for about 10 minutes to about 180 minutes.

10. The method of claim 1 , wherein the inactivating comprises reducing the number of colony forming units (cfu) on the wound by about 1 to about 6 log 10 compared to control.

11. The method of claim 1 , wherein the inactivating comprises reducing the number of colony forming units (cfu) on the wound at a rate of from about 1 log 10 /h to about 6 log 10 /h, compared to control.

12. The method of claim 1 , wherein the contacting efficiency is from about 50% to about 100%.

13. The method of claim 1 , wherein the ROS comprise hydroxide radicals (OH●) and superoxide (O 2 − ).

Assignees

• Harvard College

Inventors

• Demokritou Philip
• Pyrgiotakis Georgios
• Brain Joseph D

Classifications

• A61L2103/05

  Living organisms or biological materials · CPC title

• A61L2/18

  Liquid substances · CPC title

• A61L9/14

  using sprayed or atomised substances {including air-liquid contact processes} · CPC title

• C02F2303/04

  Disinfection · CPC title

• A61L2202/11

  Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps · CPC title