PCL Based CIP-Loaded Double-Layer Films Deposited by Low-Electron Beam Dispersion Method and its Antibacterial Properties

2020 ◽  
Vol 22 (4) ◽  
pp. 255
Author(s):  
Qin Xu ◽  
Beibei Li ◽  
Zhengwei Xu ◽  
Xiaohong Jiang ◽  
M.A. Yarmolenko ◽  
...  
Keyword(s):  
Electron Beam ◽  
Double Layer ◽  
Slow Release ◽  
Antibacterial Properties ◽  
Bottom Layer ◽  
Release Time ◽  
Release Behavior ◽  
Dispersion Method ◽  
Comprehensive Performance ◽  
Sealing Layer

In this paper, low-electron beam dispersion (EBD) method is used to prepare a kind of double-layer films on different substrates. The bottom layer is a mechanically stirred mixture of the degradable polycaprolactone (PCL) and ciprofloxacin (CIP), and the top layer is polyurethane (PU) film. The molecular structure, chemical composition and morphology of the double-layer films were investigated by FTIR, XPS and SEM. The results showed that the surfaces of the double-layer films are uniform and the thicknesses can reach micron level. In addition, the two layers are well bonded. Then the films were sliced and immersed in PBS solution, and the time-dependent variable was used to analyze the kinetic slow-release behavior of CIP in the double-layer films by agar diffusion antibacterial experiments. It can be seen that sustained release time of CIP in the double-layer films can be up to 7 days, which is due to fact that the upper PU film working as a sealing layer helps to realize the drug slow-release. Based on the above research, the comprehensive performance of the films with the composition of PCL:CIP/PU=1:1/1 is the best.

scholarly journals SiO2Antireflection Coatings Fabricated by Electron-Beam Evaporation for Black Monocrystalline Silicon Solar Cells

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Minghua Li ◽  
Hui Shen ◽  
Lin Zhuang ◽  
Daming Chen ◽  
Xinghua Liang
Keyword(s):  
Electron Beam ◽  
Solar Cells ◽  
Conversion Efficiency ◽  
Single Layer ◽  
Bottom Layer ◽  
Energy Conversion Efficiency ◽  
Electron Beam Evaporation ◽  
Silicon Solar Cells ◽  
Antireflection Coatings ◽  
Efficiency Increase

In this work we prepared double-layer antireflection coatings (DARC) by using the SiO2/SiNx:H heterostructure design. SiO2thin films were deposited by electron-beam evaporation on the conventional solar cell with SiNx:H single-layer antireflection coatings (SARC), while to avoid the coverage of SiO2on the front side busbars, a steel mask was utilized as the shelter. The thickness of the SiNx:H as bottom layer was fixed at 80 nm, and the varied thicknesses of the SiO2as top layer were 105 nm and 122 nm. The results show that the SiO2/SiNx:H DARC have a much lower reflectance and higher external quantum efficiency (EQE) in short wavelengths compared with the SiNx:H SARC. A higher energy conversion efficiency of 17.80% was obtained for solar cells with SiO2(105 nm)/SiNx:H (80 nm) DARC, an absolute conversion efficiency increase of 0.32% compared with the conventional single SiNx:H-coated cells.

scholarly journals Brief Communication: The double layer in the separatrix region during magnetic reconnection

2015 ◽  
Vol 22 (2) ◽  
pp. 167-171
Author(s):  
J. Guo ◽  
B. Yu
Keyword(s):  
Electron Beam ◽  
Magnetic Reconnection ◽  
Double Layer ◽  
Particle In Cell ◽  
Acoustic Instability ◽  
Ion Acoustic ◽  
Evolution Stage ◽  
Spatial Size ◽  
Electron Holes ◽  
Observation Results

Abstract. With two-dimensional (2-D) particle-in-cell (PIC) simulations we investigate the evolution of the double layer (DL) driven by magnetic reconnection. Our results show that an electron beam can be generated in the separatrix region as magnetic reconnection proceeds. This electron beam could trigger the ion-acoustic instability; as a result, a DL accompanied with electron holes (EHs) can be found during the nonlinear evolution stage of this instability. The spatial size of the DL is about 10 Debye lengths. This DL propagates along the magnetic field at a velocity of about the ion-acoustic speed, which is consistent with the observation results.

Investigations and Concerns about the Fate of Transgenic DNA and Protein in Livestock

2021 ◽  
Author(s):  
Ahmet Aykaç ◽  
İzel Ok
Keyword(s):  
Zinc Oxide Nanoparticles ◽  
Wound Dressing ◽  
Mesoporous Silica Nanoparticles ◽  
Healing Process ◽  
Antibacterial Properties ◽  
Release Time ◽  
Wound Healing Process ◽  
Zno Nps ◽  
And Control ◽  
Scanning Electron

Hydrogels are biocompatible and swollen materials that have been used as a wound dressing for years. Among them, chitosan-based hydrogels have become popular in the wound healing process owing to their low toxic, biocompatible, biodegradable, antibacterial properties. Chitosan (CS) has been used either as a pure form or incorporated with polymers or nanoparticles to increase antimicrobial activity and stability. In this context, zinc oxide nanoparticles (ZnO NPs) have been used to enhance antibacterial activity and mesoporous silica nanoparticles (MSN) have been employed to develop mechanical strength and control of drug release time. In this study, we report the synthesis and fully characterizations of ZnO NPs, MSN and the hydrogel by using dynamic light scattering (DLS), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR). We have also prepared and characterized chitosan-based hydrogels functionalized by MSNs and ZnO NPs.

Facile Fabrication of N-Slow Release Fertilizer Hydrogel Beads by Alginate-Based Composites

2021 ◽  
Vol 889 ◽  
pp. 91-97
Author(s):  
Suntree Sangjan ◽  
Wadchara Thongsamer
Keyword(s):  
Sodium Alginate ◽  
Slow Release ◽  
N Fertilizer ◽  
Order Kinetic ◽  
Release Behavior ◽  
Hydrogel Beads ◽  
Hydrogel Composite ◽  
Slow Release Fertilizer ◽  
Order Kinetic Model ◽  
Fertilizer Release

A novel slow-release N-fertilizer hydrogel beads were developed using sodium alginate (SA) and alginate-talcum (ST) composite as N-absorbent. In this work, the hydrogel composite were fabricated by simple method and low cost. N-fertilizer hydrogel beads were prepared two types, for SA types, which were different sodium alginate (1(SA1), 3(SA3), 5(SA5), 7(SA7), and 10(SA10) wt%). And, for ST types, sodium alginate and talcum were vary ratios to 1:0.5(S1T0.5), 1:1(S1T1), and 1:2 (S1T2). The chemical structure of hydrogel composite beads were characterized via Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The release behavior were investigate by Zero-order kinetic model, First-order kinetic model, Higuchi model and Korsmeyer-Peppas model. We have found that the N-fertilizer release constants in Korsmeyer-Peppas model were decrease with increase SA content for 1-5 wt% in SA hydrogel beads. However, SA contents were more than 5 wt% which rapidly enhanced fertilizer release. In addition, to add talcum in ST hydrogel beads significantly reduced fertilizer release rate. The N-fertilizer hydrogel beads exhibits significantly slow release behavior. These results indicates that the development of slow-release fertilizer hydrogel beads can be improve the effectiveness of N-fertilizer.

Enhancement of Antibacterial Properties of a Silver Nanowire Film via Electron Beam Irradiation

2020 ◽  
Vol 3 (4) ◽  
pp. 2117-2124 ◽  
Author(s):  
Ji-Hyeon Kim ◽  
Junfei Ma ◽  
Sungjin Jo ◽  
Seunghun Lee ◽  
Chang Su Kim
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Antibacterial Properties ◽  
Silver Nanowire ◽  
Beam Irradiation

Using antibacterial fibers and metallic wires to make woven fabrics used as smart diapers

2020 ◽  
pp. 152808372093037
Author(s):  
Bing-Chiuan Shiu ◽  
Jia-Ci Jhang ◽  
Ting-Ting Li ◽  
Hao-kai Peng ◽  
Li-wei Wu ◽  
...  
Keyword(s):  
Short Circuit ◽  
Antibacterial Properties ◽  
Silver Ions ◽  
Bottom Layer ◽  
Woven Fabrics ◽  
Cellular Phones ◽  
Electric Resistance ◽  
Nonwoven Fabrics ◽  
Metallic Wires ◽  
Moisture Absorbent

Cloth diapers also known as eco-diapers, traditional sandwich-structured eco-diapers are composed of top and bottom layers that are made of cotton or polyester nonwoven fabrics. On account of the hydrophilic bottom layer, urine permeates when the water absorption reaches saturation. In this study, polypropylene is melt-blown into hydrophobic polypropylene nonwoven fabrics to be used as the top and bottom layer. Polypropylene is hydrophobic but after being fabricated into nonwoven fabrics, the porous structure enables the urine to leak to the absorbent interlayer of eco-diapers. Hence, the top layer of diaper does not contain urine, which makes smart diapers more comfortable than cloth diapers that are made of cotton or other moisture-absorbent materials. Moreover, the sensing mechanism via Bluetooth module can detect the water content of the interlayer with a view to improving the demerit of urine leakage. The interlayer is the sensing layer that has antibacterial function. Two types of antibacterial yarns are treated by zinc oxide and silver ions. The yarns are fabricated into antibacterial woven fabrics, after which the antibacterial properties of fabrics are investigated with quantitative and qualitative tests. Next, two parallel metallic wires are assembled in order to trigger short circuit when sensing moisture, thereby obtaining different electric resistance based on different moisture levels. Furthermore, the miniature senor can signify the cellular phones or buzzers when the two metallic wires generate electrical resistance due to the presence of urine. The metallic wires are silver-plated copper yarns, stainless steel fibers, and copper fibers, which possess different electric resistance for the corresponding miniature sensors. This study proposes an efficient manufacture of smart diapers that require only a combination of woven fabrics and two metallic wires to sense moisture, the design of which can be encompassed in diverse fields.

scholarly journals Properties of Slow Release Fertilizer Composites Made from Electron Beam-irradiated Poly(Butylene Succinate) Compounded with Oil Palm Biomass and Fertilizer

BioResources ◽  
2018 ◽  
Vol 13 (4) ◽  
Author(s):  
Harmaen Ahmad Saffian ◽  
Khalina Abdan ◽  
Mohd Ali Hassan ◽  
Nor Azowa Ibrahim ◽  
Seng Hua Lee ◽  
...  
Keyword(s):  
Electron Beam ◽  
Oil Palm ◽  
Slow Release ◽  
Butylene Succinate ◽  
Slow Release Fertilizer ◽  
Oil Palm Biomass

The Effect of pH in the Tap Water on Nutrient Release from Slow Release Fertilizers

2014 ◽  
Vol 931-932 ◽  
pp. 754-757
Author(s):  
Jittrera Buates ◽  
Petchporn Chawakitchareon ◽  
Rewadee Anuwattana
Keyword(s):  
Slow Release ◽  
Tap Water ◽  
Nutrient Release ◽  
Release Behavior ◽  
Release Formulation ◽  
Total N ◽  
Nutrient Contents ◽  
Scientific Methods ◽  
N Release ◽  
Slow Release Fertilizers

The objective of this research is to study the nutrient release behaviors on slow release fertilizer (Osmocote® N13:P13:K13, 3 month release formulation). The fertilizer was added into distilled water which adjusted pH of 6.5 and 7.5. The nutrient release behaviors were determined by collecting samples every 1 week and analyzed the nutrient contents in samples by scientific methods. As the result, for the total N release behavior, it may be considered that at lower pH condition tended to release more than that at higher one, for the P (shown by P2O5) and K (shown by K2O) release behaviors may be high at high pH condition.

Microstructural, thermal and antibacterial properties of electron beam irradiated Bombyx mori silk fibroin films

2014 ◽  
Author(s):  
S. Asha ◽  
Sangappa ◽  
Prashantha Naik ◽  
K. Sharat Chandra ◽  
Ganesh Sanjeev
Keyword(s):  
Electron Beam ◽  
Bombyx Mori ◽  
Silk Fibroin ◽  
Antibacterial Properties ◽  
Bombyx Mori Silk
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