Download or read book Decontamination and Sterilization of Surfaces by Means of a One Atmosphere Uniform Glow Discharge Plasma written by and published by . This book was released on 2000 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decontamination of surfaces that have been exposed to biological agents must be accomplished quickly under battlefield conditions. Current decontamination processes utilize corrosive solutions. which require careful handling and can damage the equipment that must be treated. A simple. fast-acting. and safe method for equipment decontamination would minimize equipment downtime and minimize the number of personnel needed. It has been demonstrated that exposure of microorganisms to gas discharge plasma reaction products leads to their destruction. In particular. an air stream. treated by the One Atmosphere Uniform Glow Discharge Plasma (OAUGDP). has been shown to destroy microorganisms in a time frame of tens of seconds. Simulants of biological agents coating surfaces similar to military equipment were exposed to the OAUGDP reactor under various operating parameters. Exposure time was the principal variable. The performance of the OAUGDP reactor applied to several types of microorganism was evaluated. All microorganisms used were destroyed within seconds to minutes of plasma exposure. The results indicate that the OAUGDP can be successfully used for military biological decontamination. The OAUGDP reactor is especially useful for the decontamination of sensitive equipment. which would be harmed by chemical washes.

Download or read book Decontamination Using a One Atmosphere Uniform Glow Discharge Cold Plasma written by and published by . This book was released on 2002 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric Glow Technologies is developing an innovative mobile atmospheric plasma decon system based upon the patented one atmosphere uniform glow discharge plasma (OAUGDP) technology. This advanced system will be a deployable military protection system that will decontaminate highly toxic chemicals and microorganisms on sensitive equipment, personnel protective equipment, and aircraft, vehicle, and shelter interiors. Phase I efforts demonstrated feasibility of the system in the neutralization of chemical warfare simulants (99.3% reduction). Phase II efforts will extend studies to biological warfare agents including spores, building upon the proven efficacy of the OAUGDP against a wide range of microorganisms. Future work will involve optimizing the system for recirculation of the airflow and air cooling. Studies are currently underway to determine the concentration of atmospheric plasma produced active species as well as the extent of chemical and biological degradation achieved. The system will also be tested for materials and device compatibility as well as neutralization studies of actual chemical and biological warfare agents.

Download or read book Utilizing A One Atmosphere Uniform Discharge Plasma for Bio Chem Agent Sterilization Decon written by Malcolm McLean and published by . This book was released on 1998 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Initial experimental results demonstrated that the One Atmosphere Uniform Glow Discharge Plasma (OAUGDP) will cause structural changes in simulants for chemical agents. Phase I results established "proof of concept", that is, that the active species generated by the OAUGDP will react with and cause structural changes in chemical agent simulants. This was demonstrated using the simulant methyl salicylate (oil of wintergreen). Gas chromatography/mass spectrometry results indicate the formation of a new species with a molecular weight 16 amu greater than methyl salicylate. Based partially on this, the plasma active species is postulated to be atomic oxygen. It should be noted that methyl salicylate does not appear to react with ozone gas under standard temperature and pressure conditions. Also arising from the Phase I work is the elucidation of three distinct theories covering electrohydrodynamic (EHD) methods of neutral gas flow control. The theories are comprehensively discussed in the theoretical results section of this report. EHD flow control was developed during the Phase I work and was supported in part by Phase I funds.

Download or read book Optimization of the Mod VIII One Atmosphere Uniform Glow Discharge Plasma Reactor for Surface Energy Treatment written by and published by . This book was released on 2006 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: A plasma reactor system has been developed to provide roll-to-roll surface treatment of fabrics and films using an air plasma. Effects of air plasma surface treatment at one atmosphere can include etching, cleaning, sterilization, disinfection, and increasing surface energy, all without the use of chemical inputs and with minimal toxic by-products. Webs can be continuously and uniformly treated by proper control of gas flow, electrode configuration, plasma parameters, fabric speed, and fabric tension. Tests conducted in this work focused on raising the surface energy of PET and HDPE using various electrode configurations. For industrial applications, the exposure time required to make the surface wettable (having a contact angle less than 20 degrees) should be one second or less. The reactor system was tested with a variety of electrode geometries, two of the more successful of which were a variable gap curved-to-flat plate geometry that consists of a rotating, grounded, stainless steel drum in combination with a flat transparent upper electrode. In this configuration, a One Atmosphere Uniform Glow Discharge Plasma(OAUGDP)® exists at the minimum gap, but tends to transition to a filamentary glow discharge as the gap widens. This filamentation was minimized by proper gas flow and adjustment of the dielectric barrier configuration, reducing any negative impact on processing results. When a transparent electrode configuration is in use, the phenomenology of this unique plasma volume can be studied in situ in both the normal and transverse directions with respect to the electric field. Results are compared to previous experiments conducted in the Plasma Sciences Laboratory using static sample exposure, including effects of the exposure duration time and the ageing effect. Contact angle measurements based on the sessile water drop test were conducted to confirm proper operation and uniformity of effect.

Download or read book Increase in the Surface Energy of Metal and Polymeric Surfaces Using the One Atmosphere Uniform Glow Discharge Plasma OAUGDP written by Anna K. Carr and published by . This book was released on 1997 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plasma Assisted Decontamination of Biological and Chemical Agents written by Selçuk Güçeri and published by Springer Science & Business Media. This book was released on 2011-10-12 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma decontamination is a rapidly expanding area of modern science and engineering. An increasing number of engineers are using plasma methods for decontamination of chemical and biological agents. Plasma decontamination is effectively applied today to clean and sterilize different surfaces, high volume air and water streams, industrial exhausts, and even living tissue of animals and humans. This book provides a fundamental introduction to virtually all aspects of modern plasma decontamination, as well as the most recent technological achievements in the area. The book is segmented into four specific sections of modern plasma decontamination: (1) plasma bio-decontamination, including disinfection and sterilization of surfaces, water and air streams; (2) plasma decontamination of chemical agents, including cleaning of air, water, and industrial exhaust gases from different pollutants and especially volatile organic compounds VOC; (3) plasma treatment of living tissue, including different subjects of plasma medicine from skin sterilization to tissue engineering; (4) major electric discharges applied for the plasma-assisted decontamination of chemical and biological agents.

Download or read book Plasma for Bio Decontamination Medicine and Food Security written by Zdenko Machala and published by Springer Science & Business Media. This book was released on 2012-02-03 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-thermal (cold) plasmas at atmospheric pressure have recently found many breakthrough applications in biology, medicine, and food security. Plasmas can efficiently kill bacteria, yeasts, moulds, spores, biofilms and other hazardous microorganisms, including potential bio-terrorism agents. They can be employed for bio-decontamination and sterilization of surfaces, medical instruments, water, air, food, even of living tissues without causing their damage. Direct or indirect plasma interaction with living cells of microorganisms or even humans enables novel bio-medical applications, e.g. treatment of skin diseases and ulcers. Plasma-enhanced blood coagulation coupled with its antiseptic properties proved success in wound healing and opens new possibilities in surgery, emergency medicine and military applications. Plasma treatment allows cell manipulations, their removal and targeted transfer into the injured area, which can accelerate wound healing. Plasma induced apoptosis (programmed cell death) of tumor cells brings forth a great potential for cancer treatment. Besides, plasma enables painless treatment of dental caries, root canal disinfection, and other dentistry applications. This book is a selection of reviewed manuscripts issuing from the NATO Advanced Research Workshop Plasma for bio-decontamination, medicine and food security held in Jasná, Slovakia, on 15-18 March 2011. It provides a comprehensive overview of the current knowledge and research activities focused at the plasma applications in areas such as bio-decontamination, water chemistry, effects on cells; biofilm inactivation, UV sterilization, and medicine, especially tissue treatment and wound healing, as well as dentistry and food security.

Download or read book Exploratory Applications of a One Atmosphere Uniform Glow Discharge Plasma written by Chaoyu Liu and published by . This book was released on 1995 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Low Temperature Plasma Technology written by Paul K. Chu and published by CRC Press. This book was released on 2013-07-15 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a team of pioneering scientists from around the world, Low Temperature Plasma Technology: Methods and Applications brings together recent technological advances and research in the rapidly growing field of low temperature plasmas. The book provides a comprehensive overview of related phenomena such as plasma bullets, plasma penetration into biofilms, discharge-mode transition of atmospheric pressure plasmas, and self-organization of microdischarges. It describes relevant technology and diagnostics, including nanosecond pulsed discharge, cavity ringdown spectroscopy, and laser-induced fluorescence measurement, and explores the increasing research on atmospheric pressure nonequilibrium plasma jets. The authors also discuss how low temperature plasmas are used in the synthesis of nanomaterials, environmental applications, the treatment of biomaterials, and plasma medicine. This book provides a balanced and thorough treatment of the core principles, novel technology and diagnostics, and state-of-the-art applications of low temperature plasmas. It is accessible to scientists and graduate students in low-pressure plasma physics, nanotechnology, plasma medicine, and materials science. The book is also suitable as an advanced reference for senior undergraduate students.

Download or read book Plasma for Bio Decontamination Medicine and Food Security written by Zdenko Machala and published by Springer Science & Business Media. This book was released on 2012-02-05 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-thermal (cold) plasmas at atmospheric pressure have recently found many breakthrough applications in biology, medicine, and food security. Plasmas can efficiently kill bacteria, yeasts, moulds, spores, biofilms and other hazardous microorganisms, including potential bio-terrorism agents. They can be employed for bio-decontamination and sterilization of surfaces, medical instruments, water, air, food, even of living tissues without causing their damage. Direct or indirect plasma interaction with living cells of microorganisms or even humans enables novel bio-medical applications, e.g. treatment of skin diseases and ulcers. Plasma-enhanced blood coagulation coupled with its antiseptic properties proved success in wound healing and opens new possibilities in surgery, emergency medicine and military applications. Plasma treatment allows cell manipulations, their removal and targeted transfer into the injured area, which can accelerate wound healing. Plasma induced apoptosis (programmed cell death) of tumor cells brings forth a great potential for cancer treatment. Besides, plasma enables painless treatment of dental caries, root canal disinfection, and other dentistry applications. This book is a selection of reviewed manuscripts issuing from the NATO Advanced Research Workshop Plasma for bio-decontamination, medicine and food security held in Jasná, Slovakia, on 15-18 March 2011. It provides a comprehensive overview of the current knowledge and research activities focused at the plasma applications in areas such as bio-decontamination, water chemistry, effects on cells; biofilm inactivation, UV sterilization, and medicine, especially tissue treatment and wound healing, as well as dentistry and food security.

Download or read book Development of a Test Methodology for Determining the Efficacy of One Atmosphere Uniform Glow Discharge Plasma Against Airborne Contaminants written by Ronald Edward Domitrovic and published by . This book was released on 2006 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: A universal generation curve is developed for a parallel electrode reactor in which ozone generation rates can be determined from the known Reynolds number, electrode diameter to electrode gap ratio and plasma power to air flow power ratio. It is shown that ozone generation follows a bell shaped curve with increasing rates of production at a low ratio of plasma power to flow power, reaching a maximum and then decreasing to nearly zero at sufficiently high values of plasma power to flow power ratio. A principal area of development for OAUGDP and other atmospheric plasmas is for their use in destroying microorganisms, both on surfaces and in air streams. The ducted OAUGDP system was experimentally tested for efficacy against Bacillus atrophaeus endospores and results are presented in terms of the Reynolds number, the dimensionless plasma exposure time and the plasma power to airflow power ratio. Higher Reynolds numbers require higher treatment times for a given plasma power to flow power ratio.

Download or read book ElectroMed2001 written by and published by . This book was released on 2001 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Commerce Business Daily written by and published by . This book was released on 1998-10 with total page 1996 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Low Temperature Plasma for Biomedical Applications written by Mounir Laroussi and published by Frontiers Media SA. This book was released on 2023-11-09 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low-temperature plasmas (LTP) at atmospheric gas pressure play an increasing role in biomedical applications. The experimentally observed benefits of LTP for these applications are attributed to the controllable fluxes of chemically active species that can be produced in air at near room temperatures and delivered to bio-matter to induce desired effects. Recent research on the biomedical applications of LTP has generated new scientific knowledge regarding the interaction of plasma with soft matter including cells, tissues, seeds, and plants. The observed effects of LTP on biological cells are mediated by the plasma-produced reactive oxygen species (ROS) and reactive nitrogen species (RNS). These include hydroxyl, OH, atomic oxygen, O, singlet delta oxygen, O2(1Δ), superoxide, O2-, hydrogen peroxide, H2O2, and nitric oxide, NO. Some of these species are known to play important roles in biology serving as signaling molecules in living organisms. When they come in contact with biological cells these species interact with the lipids and proteins of the cell membrane, enter the cell and increase the intracellular ROS concentrations, which can lead to DNA damage and may compromise the integrity of other cell organelles. ROS and RNS can also trigger cell signaling pathways, which can lead to cellular death by apoptosis or necrosis. Other plasma-generated agents that could play biological roles are charged particles (electrons and ions), UV photons, and electric fields.

Download or read book Sterilization and Decontamination of Surfaces Contaminated With Biological and Chemical Warfare Agents Using Atmospheric Pressure Plasma Discharges written by and published by . This book was released on 1999 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our Phase I effort was meant to demonstrate that an effective technology for rapid surface sterilization of biological contaminants and neutralization of chemical warfare agents could be developed based on the application of an atmospheric pressure plasma. We used both a DC corona and dielectric barrier discharge for the sterilization tests which were conducted on a variety of substrates including metals and chemically resistant fabrics. Medically accepted biological indicator spores (Bacillus subtilis var niger and Bacillus stearothermophilus) were used to determine the effectiveness of the plasma discharge. The chemical neutralization tests were conducted using a DC corona discharge on a metal substrate contaminated with either diisopropylmethyl phosphonate or dimethylmethyl phosphonate. These simulants are of similar chemical structure to classes of chemical warfare agents like GB and Sarin. Results include decomposition of the chemical agent simulants with decomposition by-products including water, acetic acid and gases like CO2; complete sterilization in 15 minutes of some substrates contaminated with up to 105 spores over about a 1 cm2 and the concentration of the model pathogens and the surface characteristics of the contaminated substrate affects the sterilization results. A rough surface with defects is difficult to completely sterilize on short time scales

Download or read book Bioelectrics written by Hidenori Akiyama and published by Springer. This book was released on 2016-09-19 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on bioelectrics, a new multidisciplinary field encompassing engineering and biology with applications to the medical, environmental, food, energy, and biotechnological fields. At present, 15 universities and institutes in Japan, the USA and the EU comprise the International Consortium of Bioelectrics, intended to advance this novel and important research field. This book will serve as an introductory resource for young scientists and also as a textbook for use by both undergraduate and graduate students – the world’s first such work solely devoted to bioelectrics.

Download or read book Industrial Plasma Engineering written by J Reece Roth and published by Routledge. This book was released on 2017-11-01 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a leading expert in the field, the paperback edition of Industrial Plasma Engineering, Volume 2: Applications to Nonthermal Plasma Processing provides a background in the principles and applications of low temperature, partially ionized Lorentzian plasmas that are used industrially. The book also presents a description of plasma-related processes and devices that are of commercial interest. The text is suitable for students or in-service users with a physics and calculus background at the sophomore level. These two volumes are intended to be used as textbooks at the senior or first-year graduate level by students from all engineering and physical science disciplines and as a reference source by in-service engineers.