scholarly journals Plasma Needles on the Teeth Structure and Compressibility

2016 ◽  
Vol 2 (4) ◽  
Author(s):  
Mohammed U. Hussein
Keyword(s):  
Atmospheric Pressure ◽  
Treatment Time ◽  
Mechanical Damage ◽  
Argon Plasma ◽  
Load Force ◽  
Plasma Exposure ◽  
Negative Results ◽  
Plasma Needle ◽  
Jet Plasma ◽  
Different Gases

The aim from this research  is  to prove not affected the teeth of both damage macroscopic and  the internal structure of teeth (compressibility). The teeth were collected from (Al karama dental specialized) in Baghdad, directly after uprooted from the patient's mouth. It was in table by the material (normal saline, sodium chloride, 0.9%), according to instructions of dental disease specialist. It was regarded as a natural model replica. It has been conducted two tests on some samples: studying the macroscopic damage for teeth and studying the influence compressibility for teeth. The design of generation argon plasma needle   system, this system works on production Non- thermal plasma at atmospheric pressure, where used simples electronics constructions and cost low, it has power   to generate high electric field on electrodes enough to ionize different gases and flow in atmospheric pressure. The device jet plasma needle used  surely from  no events any  macroscopic or mechanical damage in build inside teeth (compressibility) ,where it applied  on some teeth sample at time double treatment time ,then teeth check  consequently  favorableness result ,where load  force of tooth without  plasma exposure  was 1.74kN while load  force of tooth with   plasma exposure  was 1.824kN.Studying the macroscopic damage for teeth, the mentioned area were not affected with damage or change colors, therefore in effecting the teeth with any negative results during plasma needle process.

scholarly journals Influence of non-thermal argon plasma needle on blood coagulation

2019 ◽  
Vol 14 (29) ◽  
pp. 101-106
Author(s):  
Kadhim A. Aadim
Keyword(s):  
Blood Coagulation ◽  
Power Supply ◽  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Experimental Setup ◽  
Argon Gas ◽  
Ac Power ◽  
Plasma Needle ◽  
Electric Component ◽  
Non Thermal Plasma

Non-thermal argon plasma needle at atmospheric pressure wasconstructed. The experimental setup was based on a simple and lowcost electric component that generates a sufficiently high electricfield at the electrodes to ionize the argon gas which flow atatmospheric pressure. A high AC power supply was used with 1.1kV and 19.57 kHz. Non-thermal Argon plasma used on bloodsamples to show the ability of non-thermal plasma to promote bloodcoagulation. Three tests have been done to show the ability of plasmato coagulate both normal and anti-coagulant blood. Each bloodsample has been treated for varying time from 20sec. to 180sec. atdifferent distances. The results of the current study showed that thecold plasma produced from argon significantly increase the in vitrospeed of blood coagulation, the plasma increases activation andaggregation of platelets, causes proliferation of fibroblasts and fibrinproduction accelerates blood coagulation.

scholarly journals Plasma Treatment Limits Human Melanoma Spheroid Growth and Metastasis Independent of the Ambient Gas Composition

Cancers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2570 ◽  
Author(s):  
Sybille Hasse ◽  
Tita Meder ◽  
Eric Freund ◽  
Thomas von Woedtke ◽  
Sander Bekeschus
Keyword(s):  
Plasma Treatment ◽  
Treatment Time ◽  
Argon Plasma ◽  
Ambient Air ◽  
Human Melanoma ◽  
Melanoma Metastasis ◽  
Spheroid Growth ◽  
Tumor Entity ◽  
Melanoma Treatment ◽  
Jet Plasma

Melanoma skin cancer is still a deadly disease despite recent advances in therapy. Previous studies have suggested medical plasma technology as a promising modality for melanoma treatment. However, the efficacy of plasmas operated under different ambient air conditions and the comparison of direct and indirect plasma treatments are mostly unexplored for this tumor entity. Moreover, exactly how plasma treatment affects melanoma metastasis has still not been explained. Using 3D tumor spheroid models and high-content imaging technology, we addressed these questions by utilizing one metastatic and one non-metastatic human melanoma cell line targeted with an argon plasma jet. Plasma treatment was toxic in both cell lines. Modulating the oxygen and nitrogen ambient air composition (100/0, 75/25, 50/50, 25/75, and 0/100) gave similar toxicity and reduced the spheroid growth for all conditions. This was the case for both direct and indirect treatments, with the former showing a treatment time-dependent response while the latter resulted in cytotoxicity with the longest treatment time investigated. Live-cell imaging of in-gel cultured spheroids indicated that plasma treatment did not enhance metastasis, and flow cytometry showed a significant modulation of S100A4 but not in any of the five other metastasis-related markers (β-catenin, E-cadherin, LEF1, SLUG, and ZEB1) investigated.

Effect of Atmospheric Pressure Argon Plasma Jet on the Growth of Bread Molds

2016 ◽  
Vol 675-676 ◽  
pp. 744-748 ◽  
Author(s):  
Panakamon Deeyai ◽  
Plaimein Amnuaycheewa ◽  
Pansak Kerdtongmee
Keyword(s):  
Atmospheric Pressure ◽  
Treatment Time ◽  
Power Level ◽  
Argon Plasma ◽  
Fungal Growth ◽  
Plasma Jet ◽  
Dry Weight ◽  
Wheat Bread ◽  
Whole Wheat Bread ◽  
Argon Plasma Jet

Atmospheric pressure plasma is potential to inhibit microbial growth on various food surfaces without affecting product bulk and leave no significant chemical residues. The aim of this work was to study the effect of atmospheric pressure argon plasma on the mold growth on white flour wheat bread and whole wheat bread. Aspergillus sp., was isolated from the two breads and inoculated on potato dextrose agar (PDA) and was directly exposed to argon plasma jet treatment at powers of 10, 20, or 40W for 5 or 10 min. Fungal dry weight determination was used to study the effect of APJ on the inactivation of the molds on the breads. The results showed there is a correlation between power level and treatment time. The higher the power and the longer the treatment time, the higher the degree of fungal inactivation. The amounts of the molds were significantly reduced after plasma treatment, especially in power of 40 W for 10 min. These results demonstrated that argon plasma jet could be used effectively to inhibit the fungal growth on bread surface.

Inactivation of Bread Molds on Agar by Atmospheric Pressure Plasma Jet

2017 ◽  
Vol 866 ◽  
pp. 92-96 ◽  
Author(s):  
Panakamon Thonglor ◽  
Plaimein Amnuaycheewa
Keyword(s):  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Dry Weight ◽  
Atmospheric Pressure Plasma Jet ◽  
Plasma Exposure ◽  
Pressure Plasma ◽  
Higher Power ◽  
Argon Plasma Jet

The aim of this study was to evaluate the effect of argon plasma jet, generated at atmospheric pressure, on Aspergillus sp. The molds were isolated from commercial white bread and inoculated on potato dextrose agar (PDA) containing 10% tartaric acid. The atmospheric pressure plasma jet (APPJ) was generated at a high frequency (43 kHz) power of 10, 20, or 30W and applied to the inoculated molds on PDA for 5, 10, or 20 minutes. The PDA plates were incubated for 3 and 6 days and the fungal inactivation was investigated directly under light microscope and indirectly by comparing the fungal dry weights. The results indicated that higher power supply and longer plasma exposure time led to more reduction in the fungal dry weight. The APPJ appears to be effective in destroying Aspergillus sp., yet the optimal plasma treatment condition remains to be optimized.

Argon Plasma Induced Surface Modifications For Resistless Patterning Of Aluminium Films

1991 ◽  
Vol 223 ◽  
Author(s):  
Neeta Agrawal ◽  
R. D. Tarey ◽  
K. L. Chopra
Keyword(s):  
Etch Rate ◽  
Argon Plasma ◽  
Surface Modifications ◽  
Surface Chemical ◽  
Plasma Exposure ◽  
X Ray ◽  
Aluminium Fluoride ◽  
A New Technique ◽  
Plasma Exposure Time ◽  
Surface Chemical Modification

ABSTRACTArgon plasma exposure has been used to induce surface chemical modification of aluminium thin films, causing a drastic change in etch rate in standard HNO3/CH3COOH/H3PO4 etchant. The inhibition period was found to increase with power and Ar plasma exposure time. Auger electron and x-ray photoelectron spectroscopies have indicated formation of an aluminium fluoride (AlF3) surface layer due to fluorine contamination originating from the residue left in the plasma chamber during CF4 processing. The high etch selectivity between unexposed and argon plasma exposed regions has been exploited as a new technique for resistless patterning of aluminium.

scholarly journals Effect of Low-Pressure Plasma Treatment Parameters on Wrinkle Features

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3852
Author(s):  
Bongjun Gu ◽  
Dongwook Ko ◽  
Sungjin Jo ◽  
Dong Choon Hyun ◽  
Hyeon-Ju Oh ◽  
...  
Keyword(s):  
Power Flow ◽  
Treatment Time ◽  
Argon Plasma ◽  
Negative Ions ◽  
Low Pressure ◽  
Nitrogen Plasma ◽  
Pressure Plasma ◽  
Positive Ions ◽  
Low Pressure Plasma ◽  
Optical Adhesive

Wrinkles attract significant attention due to their ability to enhance the mechanical and optical characteristics of various optoelectronic devices. We report the effect of the plasma gas type, power, flow rate, and treatment time on the wrinkle features. When an optical adhesive was treated using a low-pressure plasma of oxygen, argon, and nitrogen, the oxygen and argon plasma generated wrinkles with the lowest and highest wavelengths, respectively. The increase in the power of the nitrogen and oxygen plasma increased the wavelengths and heights of the wrinkles; however, the increase in the power of the argon plasma increased the wavelengths and decreased the heights of the wrinkles. Argon molecules are heavier and smaller than nitrogen and oxygen molecules that have similar weights and sizes; moreover, the argon plasma comprises positive ions while the oxygen and nitrogen plasma comprise negative ions. This resulted in differences in the wrinkle features. It was concluded that a combination of different plasma gases could achieve exclusive control over either the wavelength or the height and allow a thorough analysis of the correlation between the wrinkle features and the characteristics of the electronic devices.

scholarly journals Application of non-equilibrium plasmas in medicine

2012 ◽  
Vol 77 (12) ◽  
pp. 1689-1699 ◽  
Author(s):  
Zoran Petrovic ◽  
N. Puac ◽  
G. Malovic ◽  
S. Lazovic ◽  
D. Maletic ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Medical Applications ◽  
Gas Mixture ◽  
Oxygen Species ◽  
Special Issue ◽  
Plasma Sources ◽  
Volatile Organic ◽  
Plasma Needle ◽  
Group A ◽  
Non Equilibrium

We review the potential of plasma medical applications, the connections to nanotechnologies and the results obtained by our group. A special issue in plasma medicine is the development of the plasma sources that would achieve non-equilibrium at atmospheric pressure in atmospheric gas mixture with no or only marginal heating of the gas, and with desired properties and mechanisms that may be controlled. Our studies have shown that control of radicals or chemically active products of the discharge such as ROS (reactive oxygen species) and/or NO may be used to control the growth of the seeds. At the same time specially designed plasma needle and other sources were shown to be efficient to sterilize not only colonies of bacteria but also planctonic samples (microorganisms protected by water) or bio films. Finally we have shown that plasma may induce differentiation of stem cells. Non-equilibrium plasmas may be used in detection of different specific markers in medicine. For example proton transfer mass spectroscopy may be employed in detection of volatile organic compounds without their dissociation and thus as a technique for instantaneous measurement of the presence of markers for numerous diseases.

scholarly journals Surface modification of PMMA polymer and its composites with PC61BM fullerene derivative using an atmospheric pressure microwave argon plasma sheet

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Andrzej Sikora ◽  
Dariusz Czylkowski ◽  
Bartosz Hrycak ◽  
Magdalena Moczała-Dusanowska ◽  
Marcin Łapiński ◽  
...  
Keyword(s):  
Contact Angle ◽  
Surface Modification ◽  
Chemical Composition ◽  
Water Contact Angle ◽  
Plasma Sheet ◽  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Fullerene Derivative ◽  
Water Contact ◽  
Pmma Polymer

AbstractThis paper presents the results of experimental investigations of the plasma surface modification of a poly(methyl methacrylate) (PMMA) polymer and PMMA composites with a [6,6]-phenyl-C61-butyric acid methyl ester fullerene derivative (PC61BM). An atmospheric pressure microwave (2.45 GHz) argon plasma sheet was used. The experimental parameters were: an argon (Ar) flow rate (up to 20 NL/min), microwave power (up to 530 W), number of plasma scans (up to 3) and, the kind of treated material. In order to assess the plasma effect, the possible changes in the wettability, roughness, chemical composition, and mechanical properties of the plasma-treated samples’ surfaces were evaluated by water contact angle goniometry (WCA), atomic force microscopy (AFM), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). The best result concerning the water contact angle reduction was from 83° to 29.7° for the PMMA material. The ageing studies of the PMMA plasma-modified surface showed long term (100 h) improved wettability. As a result of plasma treating, changes in the samples surface roughness parameters were observed, however their dependence on the number of plasma scans is irregular. The ATR-FTIR spectra of the PMMA plasma-treated surfaces showed only slight changes in comparison with the spectra of an untreated sample. The more significant differences were demonstrated by XPS measurements indicating the surface chemical composition changes after plasma treatment and revealing the oxygen to carbon ratio increase from 0.1 to 0.4.

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