Inactivation of Bacteria by Non-Thermal Plasmas

Morent, Rino

doi:10.5772/18610

Cited by 23 publications

(20 citation statements)

References 106 publications

(181 reference statements)

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“…ICPs are more recently being used for plasma etching [3][4][5][6][7][8][9][10][11], sterilization and decontamination of sensitive material surfaces [12][13][14], particle generation [15,16], growth of carbon nano tubes [17], polymerization [18], diamond deposition [19,20] surface modification [21] and vapor deposition [22]. Additionally, ICPs are also used in life science [23], for atomic clocks for the global positioning system (GPS) [24] and they are used for thrusters in electric propulsion [25].…”

Section: Introductionmentioning

confidence: 99%

E‐H Transition in Argon/Oxygen Inductively Coupled RF Plasmas

Wegner

Küllig

Meichsner

2015

Contrib. Plasma Phys.

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This contribution presents results of comprehensive investigation of the E-H transition in an inductively coupled radio frequency argon/oxygen discharge at 13.56 MHz. For the characterization of the discharge arrangement, the spatial magnetic and electric field components of the planar coil in vacuum are calculated and provide information about the electron heating region. The used double coil leads to a radial symmetric field distribution. Further, voltage and current probe measurements reveal the inductivity of the coil and the phase shift between the coil voltage and the current. As a result, the coil current and the RF voltage are directly proportional. The phase shift is nearly constant in the E-mode and decreases slightly in the H-mode. The positive ion saturation current as well as the line integrated electron density are measured by means of Langmuir probe and 160 GHz microwave interferometer, respectively, to study the mode transition in argon with different oxygen contents. The positive ion saturation current and the electron density decrease with increasing oxygen admixture at fixed pressure and RF power. The onset and the way of the E-H transition strongly depend on the oxygen content. The mode transition of a pure argon discharge is step like and changes to a continuous mode transition with the admixture of oxygen.

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Section: Introductionmentioning

confidence: 99%

E‐H Transition in Argon/Oxygen Inductively Coupled RF Plasmas

Wegner

Küllig

Meichsner

2015

Contrib. Plasma Phys.

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“…Given that thermal plasma produces high gas temperature, non-thermal "cold" plasma is much more suitable as an emerging sterilization method [81,86] , for inactivation of microbial loads on human tissues and heat sensitive surfaces. [88] Furthermore, cold plasma can be produced at low pressures, under vacuum, but for practicality and economic reasons, it is more convenient and cost-effective when generated at atmospheric pressure and therefore called cold atmospheric-pressure plasma (CAP).…”

Section: Thermal and Non-thermal Plasmasmentioning

confidence: 99%

“…[90] Gramnegative bacteria are more susceptible to gas plasma treatments than gram-positive [104,118] and differences in susceptibility are thought to be due to variation in the thickness of the peptidoglycan murein layer in the bacterial cell wall. [86,104] Skin floral bacteria Staphylococcus epidermidis is of particular importance in sterilization of TBTM given its frequent association with contamination from procurement and processing sites. It is normally found in the hair follicle where it is protected from antiseptics.…”

Section: Mechanisms Of Microbial Inactivation By Capmentioning

confidence: 99%

“…[86,89,102] The microbial inactivation effect of CAP can be attained by direct exposure to both the ignited plasma discharge products such as ROS, RNS, UV radiation, or indirectly through the long-lived species that are capable to reach the treated substrate without the electric field effect [91] . Generally, decontamination through plasma treatment is accomplished via oxidative stress arisen from synergetic actions of plasma discharge products.…”

Section: Mechanisms Of Microbial Inactivation By Capmentioning

confidence: 99%

“…Due to this variation of the constituent's temperature, non-thermal plasma is also termed non-equilibrium plasma. [86,87] Low and atmospheric pressure plasmas…”

Section: Thermal and Non-thermal Plasmasmentioning

confidence: 99%

See 2 more Smart Citations

Terminal sterilization: Conventional methods versus emerging cold atmospheric pressure plasma technology for non‐viable biological tissues

Marsit

Sidney

Branch

et al. 2016

Plasma Processes & Polymers

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Tissue products are susceptible to microbial contamination from different sources, which may cause disease transmission upon transplantation. Terminal sterilization using gamma radiation, electron‐beam, and ethylene oxide protocols are well‐established and accepted, however, such methods have known disadvantages associated with compromised tissue integrity, functionality, safety, complex logistics, availability, and cost. Non‐thermal (cold) atmospheric pressure plasma (CAP) is an emerging technology that has several biomedical applications including sterilization of tissues, and the potential to surpass current terminal sterilization techniques. This review discusses the limitations of conventional terminal sterilization technologies for biological materials, and highlights the benefits of utilizing CAP.

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Effects of plasma activated water on wheat: Germination, growth parameters, photosynthetic pigments, soluble protein content, and antioxidant enzymes activity

Kučerová

Henselová

Slováková

et al. 2019

Plasma Processes & Polymers

111

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The paper presents the study on the effects of the plasma activated water (PAW) generated by transient spark discharge on the wheat (Triticum aestivum L.) cultivated in vitro and in vivo. Water uptake and germination of seeds, growth parameters of seedlings and plants, as well as the content of photosynthetic pigments, soluble proteins and activity of antioxidant enzymes are reported and correlated with the concentrations of reactive oxygen and nitrogen species in the PAW. The PAW improves germination, early development of the seedlings, the content of photosynthetic pigments in the leaves and soluble protein content in the roots, and suppresses the activity of antioxidant enzymes. The results indicate that the PAW may effectively stimulate growth of the wheat seedlings and positively affect their metabolism especially in the soil with low nutrient content.

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Inactivation of Bacteria by Non-Thermal Plasmas

Cited by 23 publications

References 106 publications

E‐H Transition in Argon/Oxygen Inductively Coupled RF Plasmas

E‐H Transition in Argon/Oxygen Inductively Coupled RF Plasmas

Terminal sterilization: Conventional methods versus emerging cold atmospheric pressure plasma technology for non‐viable biological tissues

Effects of plasma activated water on wheat: Germination, growth parameters, photosynthetic pigments, soluble protein content, and antioxidant enzymes activity

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