A novel antifungal surface-coating application to limit postharvest decay on coated apples: Molecular, thermal and morphological properties of electrospun zein–nanofiber mats loaded with curcumin

2016 ◽  
Vol 37 ◽  
pp. 74-83 ◽  
Author(s):  
Azime Yilmaz ◽  
Fatih Bozkurt ◽  
Perihan Kubra Cicek ◽  
Enes Dertli ◽  
Muhammed Zeki Durak ◽  
...  
Keyword(s):  
Surface Coating ◽  
Morphological Properties ◽  
Coating Application ◽  
Postharvest Decay ◽  
Nanofiber Mats

Investigation of FE model size definition for surface coating application

2012 ◽  
Vol 25 (5) ◽  
pp. 860-867 ◽  
Author(s):  
Yanhong Chen ◽  
Weimin Zhuang ◽  
Shiwen Wang ◽  
Jianguo Lin ◽  
Daniel Balint ◽  
...  
Keyword(s):  
Surface Coating ◽  
Fe Model ◽  
Coating Application ◽  
Model Size

scholarly journals Magnetic Carbon Nanofiber Mats for Prospective Single Photon Avalanche Diode (SPAD) Sensing Applications

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7873
Author(s):  
Marah Trabelsi ◽  
Al Mamun ◽  
Michaela Klöcker ◽  
Imane Moulefera ◽  
Anton Pljonkin ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
Carbon Nanofiber ◽  
Single Photon ◽  
Cost Effective ◽  
Morphological Properties ◽  
Avalanche Diode ◽  
Sensing Applications ◽  
Magnetic Nanofibers ◽  
Application Fields ◽  
Nanofiber Mats

Electrospinning enables simple and cost-effective production of magnetic nanofibers by adding nanoparticles to a polymer solution. In order to increase the electrical conductivity of such nanofibers, the carbonization process is crucial. In this study, the chemical and morphological properties of magnetic nanofiber mats prepared from polyacrylonitrile (PAN)/magnetite were investigated. In our previous studies, PAN/magnetite nanofiber mats were carbonized at 500 °C, 600 °C, and 800 °C. Here, PAN/magnetite nanofiber mats were carbonized at 1000 °C. The surface morphology of these PAN/magnetite nanofiber mats is not significantly different from nanofiber mats thermally treated at 800 °C and have remained relatively flexible at 1000 °C, which can be advantageous for various application fields. The addition of nanoparticles increased the average fiber diameter compared to pure PAN nanofiber mats and improved the dimensional stability during thermal processes. The high conductivity, the high magnetization properties, as well as shielding against electromagnetic interference of such carbonized nanofibers can be proposed for use in single photon avalanche diode (SPAD), where these properties are advantageous.

scholarly journals Carboxymethyl Cellulose (CMC) Based Electrospun Composite Nanofiber Mats for Food Packaging

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 302
Author(s):  
Motahira Hashmi ◽  
Sana Ullah ◽  
Azeem Ullah ◽  
Yusuke Saito ◽  
Md. Kaiser Haider ◽  
...  
Keyword(s):  
Carboxymethyl Cellulose ◽  
Food Packaging ◽  
Fruits And Vegetables ◽  
Continuous Production ◽  
Chemical Properties ◽  
Morphological Properties ◽  
Natural Polymers ◽  
Plastic Container ◽  
Sustainable Food ◽  
Nanofiber Mats

Cellulose is one of the most abundantly available natural polymers. Carboxymethyl cellulose (CMC) belongs to the cellulose family and has different degrees of substitution. Current research comprises the fabrication and characterization of CMC nanofibers using polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVP) as capping agents and carriers for sustainable food packaging applications. Recently authors successfully fabricated smooth and uniform nanofibers of stated polymers and optimized the ratios of three polymers for continuous production. However, in this research, it was further characterized for mechanical properties, surface properties, structural properties, air permeability, and chemical properties to confirm the suitability and scope of tri-component nanofibrous mats in food packaging applications. Different fruits and vegetables were packed in a plastic container and closed by nanofiber mats and by a plastic lid. All samples were observed after a specific period of time (fruits were kept for 40 days while vegetables were kept for 10 days in the controlled environment). It was observed in the results that fruits and vegetables closed by nanofiber based webs exhibited better freshness and lower accumulation of moisture as compared to that of containers with plastic lids. From the results of performed tests, it was observed that nanofiber mats possess enough mechanical, structural, and morphological properties to be used as food packaging.

scholarly journals POSSIBILITIES TO EXTEND THE LIFETIME OF SCREW DOWNHOLE MOTOR ROTORS SURFACE LAYER

2016 ◽  
pp. 72-78
Author(s):  
A. V. Oshibkov ◽  
M. V. Dvoinikov ◽  
S. A. Frolov ◽  
V. N. Svetashov ◽  
V. N. Pan’Kov ◽  
...  
Keyword(s):  
Surface Layer ◽  
Surface Coating ◽  
Coating Application ◽  
Surface Strengthening ◽  
Automated Line

The article considers the methods for surface strengthening of screw downhole motors rotors. The automated line and technology for rotors surface coating application are described.

scholarly journals Impact of a Novel Antimicrobial Surface Coating on Health Care–Associated Infections and Environmental Bioburden at 2 Urban Hospitals

2019 ◽  
Vol 71 (8) ◽  
pp. 1807-1813 ◽  
Author(s):  
Katherine D Ellingson ◽  
Kristen Pogreba-Brown ◽  
Charles P Gerba ◽  
Sean P Elliott
Keyword(s):  
Health Care ◽  
Environmental Contamination ◽  
Surface Coating ◽  
Environmental Samples ◽  
The United States ◽  
Bacterial Colony ◽  
Coating Application ◽  
Urban Hospitals ◽  
Control Units ◽  
The Impact

Abstract Background Approximately 1 in 25 people admitted to a hospital in the United States will suffer a health care–associated infection (HAI). Environmental contamination of hospital surfaces contributes to HAI transmission. We investigated the impact of an antimicrobial surface coating on HAIs and environmental bioburdens at 2 urban hospitals. Methods A transparent antimicrobial surface coating was applied to patient rooms and common areas in 3 units at each hospital. Longitudinal regression models were used to compare changes in hospital-onset multidrug-resistant organism bloodstream infection (MDRO-BSI) and Clostridium difficile infection (CDI) rates in the 12 months before and after application of the surface coating. Incidence rate ratios (IRRs) were compared for units receiving the surface coating application and for contemporaneous control units. Environmental samples were collected pre- and post-application to identify bacterial colony forming units (CFUs) and the percent of sites positive for select, clinically relevant pathogens. Results Across both hospitals, there was a 36% decline in pooled HAIs (combined MDRO-BSIs and CDIs) in units receiving the surface coating application (IRR, 0.64; 95% confidence interval [CI], .44–.91), and no decline in the control units (IRR, 1.20; 95% CI, .92–1.55). Following the surface application, the total bacterial CFUs at Hospitals A and B declined by 79% and 75%, respectively; the percentages of environmental samples positive for clinically relevant pathogens also declined significantly for both hospitals. Conclusions Statistically significant reductions in HAIs and environmental bioburdens occurred in the units receiving the antimicrobial surface coating, suggesting the potential for improved patient outcomes and persistent reductions in environmental contamination. Future studies should assess optimal implementation methods and long-term impacts.

scholarly journals Needleless Electrospun Magnetic Carbon Nanofiber Mats for Sensor Applications

2021 ◽  
Vol 6 (1) ◽  
pp. 76
Author(s):  
Marah Trabelsi ◽  
Al Mamun ◽  
Michaela Klöcker ◽  
Lilia Sabantina
Keyword(s):  
Carbon Nanofiber ◽  
Volume Ratio ◽  
Morphological Properties ◽  
High Porosity ◽  
Sensor Applications ◽  
Sensing Applications ◽  
Electrospinning Method ◽  
Magnetic Nanofibers ◽  
Nanofiber Mats ◽  
Surface Morphologies

Magnetic nanofibers can be fabricated by adding nanoparticles in polymer solution using electrospinning method. The advantages of such nanofibers include a large surface-to-volume ratio and high porosity, which makes them promising for sensing applications. In addition, carbonization of such nanofibers increases electrical conductivity. In this study, the chemical and morphological properties of magnetic nanofiber mats prepared from polyacrylonitrile (PAN)/magnetite and carbonized at 500 °C, 600 °C, 800 °C, and 1000 °C were measured. Resulting surface morphologies with some agglomerations are discussed. Addition of nanoparticles increased average fiber diameter and improved dimensional stability.

Photocrosslinkable modified vegetable oil based resin for wood surface coating application

2012 ◽  
Vol 74 (4) ◽  
pp. 697-704 ◽  
Author(s):  
Arunjunai Raj Mahendran ◽  
Günter Wuzella ◽  
Nicolai Aust ◽  
Andreas Kandelbauer ◽  
Uwe Müller
Keyword(s):  
Vegetable Oil ◽  
Wood Surface ◽  
Surface Coating ◽  
Coating Application

Emergence of Twisted Magnetic Flux Related Sigmoidal Brightening

2000 ◽  
Vol 179 ◽  
pp. 263-264
Author(s):  
K. Sundara Raman ◽  
K. B. Ramesh ◽  
R. Selvendran ◽  
P. S. M. Aleem ◽  
K. M. Hiremath
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Magnetic Flux ◽  
Ultra Violet ◽  
Active Regions ◽  
Morphological Properties ◽  
Energy Storage And Conversion ◽  
The Sun ◽  
X Rays ◽  
The Magnetic Field

Extended AbstractWe have examined the morphological properties of a sigmoid associated with an SXR (soft X-ray) flare. The sigmoid is cospatial with the EUV (extreme ultra violet) images and in the optical part lies along an S-shaped Hαfilament. The photoheliogram shows flux emergence within an existingδtype sunspot which has caused the rotation of the umbrae giving rise to the sigmoidal brightening.It is now widely accepted that flares derive their energy from the magnetic fields of the active regions and coronal levels are considered to be the flare sites. But still a satisfactory understanding of the flare processes has not been achieved because of the difficulties encountered to predict and estimate the probability of flare eruptions. The convection flows and vortices below the photosphere transport and concentrate magnetic field, which subsequently appear as active regions in the photosphere (Rust & Kumar 1994 and the references therein). Successive emergence of magnetic flux, twist the field, creating flare productive magnetic shear and has been studied by many authors (Sundara Ramanet al.1998 and the references therein). Hence, it is considered that the flare is powered by the energy stored in the twisted magnetic flux tubes (Kurokawa 1996 and the references therein). Rust & Kumar (1996) named the S-shaped bright coronal loops that appear in soft X-rays as ‘Sigmoids’ and concluded that this S-shaped distortion is due to the twist developed in the magnetic field lines. These transient sigmoidal features tell a great deal about unstable coronal magnetic fields, as these regions are more likely to be eruptive (Canfieldet al.1999). As the magnetic fields of the active regions are deep rooted in the Sun, the twist developed in the subphotospheric flux tube penetrates the photosphere and extends in to the corona. Thus, it is essentially favourable for the subphotospheric twist to unwind the twist and transmit it through the photosphere to the corona. Therefore, it becomes essential to make complete observational descriptions of a flare from the magnetic field changes that are taking place in different atmospheric levels of the Sun, to pin down the energy storage and conversion process that trigger the flare phenomena.

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