scholarly journals Aqueous and gaseous plasma applications for the treatment of mung bean seeds

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Martina Darmanin ◽  
Antje Fröhling ◽  
Sara Bußler ◽  
Julia Durek ◽  
Susanne Neugart ◽  
...  
Keyword(s):  
Mung Bean ◽  
Negative Impact ◽  
Nutrient Content ◽  
Positive Outcome ◽  
Test Tube ◽  
Atmospheric Plasma ◽  
Surface Barrier ◽  
Viral Pathogens ◽  
Surface Barrier Discharge ◽  
Set Up

AbstractSprouts are particularly prone to microbial contamination due to their high nutrient content and the warm temperatures and humid conditions needed for their production. Therefore, disinfection is a crucial step in food processing as a means of preventing the transmission of bacterial, parasitic and viral pathogens. In this study, a dielectric coplanar surface barrier discharge (DCSBD) system was used for the application of cold atmospheric plasma (CAP), plasma activated water (PAW) and their combination on mung bean seeds. Germination assessments were performed in a test tube set-up filled with glass beads and the produced irrigation water. Overall, it was found that the combined seed treatment with direct air CAP (350 W) and air PAW had no negative impact on mung bean seed germination and growth, nor the concentration of secondary metabolites within the sprouts. These treatments also reduced the total microbial population in sprouts by 2.5 log CFU/g. This research reports for first time that aside from the stimulatory effect of plasma discharge on seed surface disinfection, sustained plasma treatment through irrigation of treated seeds with PAW can significantly enhance seedling growth. The positive outcome and further applications of different forms, of plasma i.e., gaseous and aqueous, in the agro-food industry is further supported by this research.

scholarly journals Plasma applications for the treatment of bean sprouts: safety, quality and nutritional assessments under aqueous and gaseous set-ups

2021 ◽  
Author(s):  
Martina Darmanin ◽  
Antje Fröhling ◽  
Sara Bußler ◽  
Julia Durek ◽  
Susanne Neugart ◽  
...  
Keyword(s):  
Mung Bean ◽  
Negative Impact ◽  
Nutrient Content ◽  
Positive Outcome ◽  
Atmospheric Plasma ◽  
Surface Barrier ◽  
Viral Pathogens ◽  
Surface Barrier Discharge ◽  
Germination And Growth ◽  
First Time

Abstract Sprouts are particularly prone to microbial contamination due to their high nutrient content and the warm temperatures and humid conditions needed for their production. Therefore, disinfection is a crucial step in food processing as a means of preventing the transmission of bacterial, parasitic and viral pathogens. In this study, a dielectric coplanar surface barrier discharge (DCSBD) system was used for the application of cold atmospheric plasma (CAP), plasma activated water (PAW) and their combination on mung bean seeds. Overall, it was found that the combined seed treatment with direct air CAP (350 W) and air PAW had no negative impact on mung bean seed germination and growth, nor the concentration of secondary metabolites within the sprouts. These treatments also reduced the total microbial population in sprouts by 2.5 log CFU/g. This research reports for first time that aside from the stimulatory effect of plasma discharge on seed surface disinfection, sustained plasma treatment through irrigation of treated seeds with PAW can significantly enhance seedling growth. The positive outcome and further applications of different forms, of plasma i.e., gaseous and aqueous, in the agro-food industry is further supported by this research.

scholarly journals Inactivation of L. monocytogenes and S. typhimurium Biofilms by Means of an Air-Based Cold Atmospheric Plasma (CAP) System

Foods ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 157 ◽  
Author(s):  
Marlies Govaert ◽  
Cindy Smet ◽  
Annika Graeffe ◽  
James L. Walsh ◽  
Jan F. M. Van Impe
Keyword(s):  
Barrier Discharge ◽  
Ambient Air ◽  
Atmospheric Plasma ◽  
Inactivation Kinetics ◽  
Surface Barrier ◽  
Discharge System ◽  
Cold Atmospheric Plasma ◽  
Population Type ◽  
Cell Densities ◽  
Set Up

Previous (biofilm) inactivation studies using Cold Atmospheric Plasma (CAP) focused on helium (with or without the addition of oxygen) as feeding gas since this proved to result in a stable and uniform plasma. In industry, the use of helium gas is expensive and unsafe for employees. Ambient air is a possible substitute, provided that similar inactivation efficacies can be obtained. In this research, 1 and 7 day-old (single/dual-species) model biofilms containing L. monocytogenes and/or S. typhimurium cells were treated with an air-based Surface Barrier Discharge (SBD) plasma set-up for treatment times between 0 and 30 min. Afterwards, cell densities were quantified via viable plate counts, and predictive models were applied to determine the inactivation kinetics and the efficacy. Finally, the results were compared to previously obtained results using a helium-based SBD and DBD (Dielectric Barrier Discharge) system. This study has demonstrated that the efficacy of the air-based CAP treatment depended on the biofilm and population type, with log-reductions ranging between 1.5 and 2.5 log10(CFU/cm2). The inactivation efficacy was not significantly influenced by the working gas, although the values were generally higher for the air-based system. Finally, this study has demonstrated that the electrode configuration was more important than the working gas composition, with the DBD electrode being the most efficient.

Surface analysis of groundwood paper treated by diffuse coplanar surface barrier discharge (DCSBD) type atmospheric plasma in air and in nitrogen

Holzforschung ◽  
2007 ◽  
Vol 61 (5) ◽  
pp. 528-531 ◽  
Author(s):  
András Tóth ◽  
Ludmila Černáková ◽  
Mirko Černák ◽  
Katarína Kunovská
Keyword(s):  
Plasma Treatment ◽  
Barrier Discharge ◽  
Surface Composition ◽  
Local Maximum ◽  
Atmospheric Plasma ◽  
Surface Barrier ◽  
Air Plasma ◽  
Surface Barrier Discharge ◽  
N Incorporation ◽  
Air Plasma Treatment

Abstract Paper made of groundwood was surface treated by atmospheric plasma of the diffuse coplanar surface barrier discharge (DCSBD) type in air and in nitrogen. Changes in surface composition and chemical bonding of the constituent elements were studied by X-ray photoelectron spectroscopy (XPS), and alterations in wetting were examined by contact angle measurements. Air plasma treatment resulted in strong oxidation but no N incorporation, while the ratio of the area of the O1 component (binding energy 532.1 eV) to that of the O2 component (533.2 eV) decreased, reflecting an increase in the proportion of O in C–O type bonds. Nitrogen plasma treatment followed by exposure to the atmosphere resulted in a slight N incorporation (1.5 at.%) and oxidation even more intense than observed for air plasma treatment. The O1/O2 ratio slightly increased, implying more O in C=O type bonds. The time dependence of surface oxidation showed a local maximum at treatment time of approximately 2 s for both the air and nitrogen plasmas.

Work Stress and Organisational Citizenship Behaviours (OCBs) in Call Centers Employees

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Sunita ◽  
Urvashi Singh ◽  
Shalini Singh ◽  
Rajnee Sharma
Keyword(s):  
Negative Impact ◽  
Call Centers ◽  
Negative Relationship ◽  
Married Couples ◽  
Call Centre ◽  
Simple Correlation ◽  
Nuclear Families ◽  
Set Up ◽  
Stress At Work ◽  
The Relationship

The present study was conducted to examine the relationship between organisational stress and organisational citizenship behaviours (OCBs) in employees of call centers. The study also further explored as how stress at work set-up has negative impact on OCBs. A sample of 250 employees working in call centre of Gurgaon belonging to an age group of 25-30 years were selected on availability basis. All were working married couples living in nuclear families. Job stress survey (Spielberger & Vagg, 1999) and Organisational Citizenship Behaviour (Bateman & Organ, 1983) were administered. Data was analysed by using simple correlation and multiple regression. Results showed the negative relationship between organisational stress and OCBs. Results of regression analysis also exhibited the negative impact of stress on OCBs. The implications for the employees are discussed.

scholarly journals Winter rye tolerance to low temperatures after seed treatment with surface barrier discharge

2021 ◽  
Vol 1787 (1) ◽  
pp. 012064
Author(s):  
S V Gundareva ◽  
A V Lazukin ◽  
N V Dorofeev ◽  
A G Romanov ◽  
S A Krivov
Keyword(s):  
Low Temperatures ◽  
Seed Treatment ◽  
Barrier Discharge ◽  
Surface Barrier ◽  
Winter Rye ◽  
Surface Barrier Discharge

Influence of Ozone Generated by Surface Barrier Discharge on Nematode and Plant Growth

2016 ◽  
Vol 44 (12) ◽  
pp. 3071-3076 ◽  
Author(s):  
Fumiaki Mitsugi ◽  
Tomoya Abiru ◽  
Tomoaki Ikegami ◽  
Kenji Ebihara ◽  
Shin-Ichi Aoqui ◽  
...  
Keyword(s):  
Plant Growth ◽  
Barrier Discharge ◽  
Surface Barrier ◽  
Surface Barrier Discharge

scholarly journals An open-source surface barrier discharge plasma pretreatment for reduced cracking of outdoor wood coatings

Cellulose ◽  
2021 ◽  
Author(s):  
Sebastian Dahle ◽  
Megi Pilko ◽  
Jure Žigon ◽  
Rok Zaplotnik ◽  
Marko Petrič ◽  
...  
Keyword(s):  
Discharge Plasma ◽  
Barrier Discharge ◽  
Protective Coatings ◽  
Surface Barrier ◽  
Source Surface ◽  
Plasma Pretreatment ◽  
Plasma Device ◽  
Surface Barrier Discharge ◽  
Barrier Discharge Plasma ◽  
Outdoor Weathering

AbstractThe development of a simple surface barrier discharge plasma device is presented to enable more widespread access to and utilization of plasma technology. The application of the plasma device was demonstrated for pretreatment of wood prior to application of protective coatings for outdoor usage. The coatings' overall performance was increased, showing a reduction or absence of cracking due to weathering on plasma-pretreated specimens. Moreover, after ten months of outdoor weathering, the plasma-pretreated specimens showed fewer infections with biotic factors and improved adhesion performance in cross-cut tests, while the surface gloss performed independently from plasma pretreatment. In contrast to that, plasma-pretreated specimens were slightly more prone to discoloration due to outdoor weathering, whereas the plasma pretreatment did not impact the initial color after coating application. Graphic abstract

scholarly journals INFLUENCE OF SUBSTRATE THICKNESS ON DIFFUSE COPLANAR SURFACE BARRIER DISCHARGE PROPERTIES

2014 ◽  
Vol 54 (6) ◽  
pp. 383-388 ◽  
Author(s):  
Jan Čech ◽  
Miroslav Zemánek ◽  
Pavel Sťahel ◽  
Hana Dvořáková ◽  
Mirko Černák
Keyword(s):  
Atmospheric Pressure ◽  
Barrier Discharge ◽  
Ccd Camera ◽  
Surface Barrier ◽  
Substrate Thickness ◽  
Barrier Thickness ◽  
Electrical Parameters ◽  
Dielectric Barrier ◽  
Surface Barrier Discharge ◽  
Influence Of Substrate

In presented work the influence of dielectric barrier thickness on the parameters of Diffuse Coplanar Surface Barrier Discharge was investigated. The discharge was operated at atmospheric pressure laboratory air. The electrical parameters of the system were studied both experimentally and using numerical simulations. The discharge pattern was studied as well using intensified CCD camera.

Full scale co-digestion of organic waste

2000 ◽  
Vol 41 (3) ◽  
pp. 195-202 ◽  
Author(s):  
H. Kübler ◽  
K. Hoppenheidt ◽  
P. Hirsch ◽  
A. Kottmair ◽  
R. Nimmrichter ◽  
...  
Keyword(s):  
Negative Impact ◽  
Biogas Production ◽  
Electrical Power ◽  
Nutrient Content ◽  
Primary Energy ◽  
Gas Production ◽  
Waste Streams ◽  
Volatile Solids ◽  
Operation Results ◽  
The Impact

Operational results of a co-digestion facility were assessed over a period of 18 months. The organic fraction of municipal solid waste (OFMSW) contains a considerable amount of contaminants and grit (up to 6% w/w). A BTA-Pulper efficiently treated the different waste streams and converted a high amount of volatile solids (VS) into the digester feedstock. The seasonal fluctuations of the waste composition significantly influenced the biogas production. The impact of this seasonally variant degradability of VS had to be considered by evaluating the operation results. The waste streams investigated did not show any negative impact on digester performance. The hydraulic retention time (HRT) in the digester considerably affected the VS-reduction. Despite a considerable decrease of VS-degradation a reduction of HRT from 14 to 8 days slightly improves the gas production rate (GPR). An activated sludge system efficiently reduced the pollution of the effluent.The nutrient content of the anaerobic compostwas favourable and the content of pollutants was low. The facility produced surplus electrical power up to 290 MJ/t. An overall energy balance shows that the facility substitutes primary energy.

Sign in / Sign up

Export Citation Format

Share Document