Colonization by Staphylococcus aureus of Nano-Structured Fluorinated Surfaces, Formed by Different Methods of Ion-Plasma Technology

2016 ◽  
Vol 162 (1) ◽  
pp. 71-74 ◽  
Author(s):  
V. M. Elinson ◽  
L. V. Didenko ◽  
N. V. Shevlyagina ◽  
G. A. Avtandilov ◽  
A. Kh. Gaidarova ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Plasma Technology ◽  
Ion Plasma

scholarly journals Increased Wear Resistance of High-Speed Tools Due to Diffusion Discrete Oxidation

2021 ◽  
Vol 346 ◽  
pp. 02014
Author(s):  
Elena A. Chekalova ◽  
Andrey V. Zhuravlev
Keyword(s):  
Wear Resistance ◽  
Comparative Studies ◽  
Surface Hardening ◽  
High Speed ◽  
Cutting Tool ◽  
Plasma Technology ◽  
Polycrystalline Structure ◽  
Ion Plasma ◽  
Discrete Surface ◽  
Oxidation Technology

Comparative studies of the effect of discrete surface hardening by standard ion-plasma technology and discrete oxidation technology on wear resistance have been carried out. Metallographic studies have shown that discrete oxidation has a polycrystalline structure. It was found that the technology of discrete oxidation makes it possible to increase the hardness by 31% in relation to the uncoated material, and the wear resistance of the cutting tool with oxidation is 1.5-3 times higher than that of the tool hardened by the standard ion-plasma technology.

scholarly journals Highly effective silver oxides: influence of oxygen concentration on antibacterial activity against clinical strains of Staphylococcus aureus

2021 ◽  
Vol 5 ◽  
pp. 54-60
Author(s):  
E.M. Gordina ◽  
◽  
S.A. Bozhkova ◽  
A.A. Erusin ◽  
◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Silver Oxide ◽  
Clinical Strains ◽  
Ion Plasma ◽  
Manual Methods ◽  
Subsequent Measurement ◽  
Minimum Ratio ◽  
Density Results ◽  
Metallic Target

Aim of study. Comparative analysis of antibacterial activity of silver oxides (Ag0,2O, Ag1 O, Ag2 O) in relation to clinical strains of Staphylococcus aureus obtained from patients with orthopaedic infection. Material and methods. Films of silver oxides were coated on paper surface in vacuum via the method of ion-plasma arc sputtering of the metallic target. Isolation of S.aureus was performed via standard manual methods from January to June 2021, identification was carried out via the MALDI-TOF-MS method. Sensitivity to antibiotics was evaluated according to EUCAST (2021, v.11.0) requirements. Antibacterial activity of the silver oxide samples obtained against 130 clinical strains of S.aureus was analysed in liquid nutrient broth with subsequent measurement of optical density. Results. Over 90% of the clinical strains of S.aureus isolated from patients with orthopaedic infection were sensitive to the silver oxides obtained. The amount of oxygen in the compound exerted almost no influence on the sensitivity to the oxides: even a minimum ratio between silver and oxygen provided a pronounced antibacterial effect. Additionally, the sensitivity to silver oxides did not depend on the MRSA resistance phenotype and the compounds were effective against XDR strains of S.aureus in 96.7% of the cases. Conclusion. All tested samples of silver oxides (Ag0,2O, Ag1 O, Ag2O) were characterised by pronounced antibacterial activity against S. aureus. The data obtained point to prospects in application of silver oxides for prevention and treatment of orthopaedic infection induced by Staphylococcus aureus without regard for the sensitivity phenotype of the pathogen.

Discrete Oxidation of a Hard Carbide Tool

2021 ◽  
Vol 316 ◽  
pp. 777-782
Author(s):  
Elena A. Chekalova ◽  
A.V. Zhuravlev
Keyword(s):  
Surface Hardening ◽  
High Speed ◽  
Cutting Tool ◽  
Uniform Structure ◽  
Complex Profile ◽  
Plasma Technology ◽  
Oxidation Layer ◽  
Ion Plasma ◽  
Discrete Surface ◽  
Oxidation Technology

Comparative investigations of the effect of discrete surface hardening by standard ion-plasma technology and discrete oxidation technology on the structure and hardness of high-speed steels are carried out. It is shown that, after hardening in the ion-plasma installation on the surface and in the thickness of the layer, droplet-shaped defects, craters and bundles are formed. Metallographic studies showed that the hardened discrete oxidation layer after repeated hardening has a dense, uniform structure. It has been established that the discrete oxidation technology allows to increase the wear resistance of a complex-profile cutting tool 2 times more, compared to a tool hardened by standard ion-plasma technology after regrinding.

scholarly journals KAJIAN ARTIKEL: POTENSI PLASMA NON TERMAL SEBAGAI KANDIDAT TERAPI MASTITIS SUBKLINIS

2020 ◽  
Vol 10 ◽  
pp. 1-9
Author(s):  
Elfahra Casanza Amalda ◽  
Farah Alhamidah ◽  
Yudit Oktanella ◽  
Muhammad Khuzain
Keyword(s):  
Staphylococcus Aureus ◽  
Biofilm Formation ◽  
Normal Cell ◽  
Bacterial Contamination ◽  
Clinical Symptoms ◽  
Subclinical Mastitis ◽  
Oxygen Species ◽  
Veterinary Science ◽  
Plasma Technology ◽  
Medical Field

Subclinical mastitis is the occurrence of inflammation in the parenchymal tissue of mammaryglands due to bacterial contamination that does not show clinical symptoms lead to impacted oneconomic losses. The highest incidence of subclinical mastitis is the presence of Staphylococcusaureus bacteria contamination. Subclinical mastitis in Indonesia is reported to reduce milk productionby up to 53.5%. Pathogenesis of Staphylococcus aureus occurs in the presence of biofilm formation asbacterial immune system to protecting itself from disinfectants and antibiotics. In the last few decades,the development of plasma technology has been widely used in the medical field as cancer therapy,reducing pain, accelerating wound healing and tissue sterilization. There is no study that using theconcept of utilizing Non Termal Plasma in the field of veterinary science, especially in mastitistherapy. Non Termal Plasma is able to decontaminate Staphylococcus aureus through inhibition anddestruction of biofilms. The mechanism of action of Non Termal Plasma in repairing mammary glandtissue is through the destruction of DNA in the Reactive Oxygen Species (ROS) process by increasingthe growth factor TGF-1 which accelerates the process normal cell regeneration. The objective ofthis study is to reviewing the efficacy of plasma non termal as subclinical mastitis theraphy. This studywas conducted through a narrative review approach by collecting international and nationalliterature with interval time of publication within 2010 – 2020.

Sign in / Sign up

Export Citation Format

Share Document