scholarly journals Research of YBCO Superconductor Coating on Austenitic Stainless Steel by Electrophoretic Deposition Method

2021 ◽  
Author(s):  
Shuya Sato ◽  
Setsuko Koura
Keyword(s):  
Electrophoretic Deposition ◽  
High Performance ◽  
Lower Cost ◽  
The Other ◽  
Ybco Superconductor ◽  
Deposition Method ◽  
Fabrication Method ◽  
Superconducting Wires ◽  
Ybco Layer ◽  
Current Value

Yttrium-based superconductors (YBCO) haven’t been widely applied. One reason is because of its high cost. In this study, we replaced the substrate and the fabrication method with lower-cost one, and found the possibility of making high-performance superconducting wires. Specifically, YBCO layer was fabricated by Electrophoretic deposition (EPD). Fabrication by this method needs calcination. The phenomenon that Fe in the substrate diffuses to YBCO layer during calcinating was confirmed. It was caused a decrease in YBCO performance. Therefore, CeO2 as an intermediate layer of substrate and YBCO was fabricated by EPD. It showed the possibility of preventing the spread of Fe. On the other hand, textured CeO2 layer was also fabricated in order to increase the characteristics of superconductor by EPD. And then it was also shown that to obtain a priority orientation is possible by controlling the current value.

scholarly journals Elimination of gatifloxacin from water: Treatment by electro-Fenton process and highlighting of a biological post-treatment

2019 ◽  
Vol 8 (4) ◽  
pp. 308-319 ◽  
Author(s):  
Mohamed Reda Arhoutane ◽  
Ghizlan Kaichouh ◽  
Muna Shueai Yahya ◽  
Miloud El Karbane ◽  
Hind Chakchak ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
High Performance ◽  
Lower Cost ◽  
Oxidative Degradation ◽  
Oxygen Demand ◽  
Fenton Process ◽  
Efficient Treatment ◽  
Liquid Chromatography Tandem Mass ◽  
Current Value ◽  
By Products

This study concerns the oxidative degradation and mineralization of gatifloxacin in aqueous solution at pH = 3 and in the presence of Fe2+ as catalyst  using electro-Fenton (EF) process, with carbon felt as a cathode and platinum as an anode. The mineralization is evaluated by the chemical oxygen demand by assessing the applied current value and concentration of catalyst Fe2+. Some stable by-products of gatifloxacin have been identified using high-performance liquid chromatography and liquid chromatography tandem mass spectrometry. The second part of this paper concerns the study of the biodegradability in determining of BOD5/COD during the mineralization of gatifloxacin by EF in order to evaluate the possibility of coupling electro-Fenton process with the biological one. This leads to an efficient treatment of water contaminated by this antibiotic with lower cost.

scholarly journals High-Performance Graphene Coating on Titanium Bipolar Plates in Fuel Cells via Cathodic Electrophoretic Deposition

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 437
Author(s):  
Yi Liu ◽  
Luofu Min ◽  
Wen Zhang ◽  
Yuxin Wang
Keyword(s):  
Graphene Oxide ◽  
Fuel Cells ◽  
Electrophoretic Deposition ◽  
High Performance ◽  
Proton Exchange Membrane ◽  
Corrosion Current ◽  
Proton Exchange ◽  
Bipolar Plates ◽  
Modified Graphene Oxide ◽  
Bare Titanium

In this article, we proposed a facile method to electrophoretically deposit a highly conductive and corrosion-resistant graphene layer on metal bipolar plates (BPs) while avoiding the oxidation of the metal substrate during the electrophoretic deposition (EPD). p-Phenylenediamine (PPD) was first grafted onto negatively charged graphene oxide (GO) to obtain modified graphene oxide (MGO) while bearing positive charges. Then, MGO dispersed in ethanol was coated on titanium plates via cathodic EPD under a constant voltage, followed by reducing the deposited MGO with H2 at 400 °C, gaining a titanium plate coated with reduced MGO (RMGO@Ti). Under the simulated environment of proton exchange membrane fuel cells (PEMFCs), RMGO@Ti presents a corrosion current of < 10−6 A·cm−2, approximately two orders of magnitude lower than that of bare titanium. Furthermore, the interfacial contact resistance (ICR) of RMGO@Ti is as low as 4 mΩ·cm2, which is about one-thirtieth that of bare titanium. Therefore, RMGO@Ti appears very promising for use as BP in PEMFCs.

scholarly journals Biofoam of Spittlebug, Poophilus costalis (Walker): Preferential Sites, Temperature Regulation, Chemical Composition and Antimicrobial Activity

Insects ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 340
Author(s):  
Kitherian Sahayaraj ◽  
Balakrishnan Saranya ◽  
Samy Sayed ◽  
Loko Yêyinou Laura Estelle ◽  
Koilraj Madasamy
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
High Performance ◽  
Host Plants ◽  
Ground Level ◽  
College Campus ◽  
The Other ◽  
Mimosa Pudica ◽  
Ft Ir ◽  
Gas Chromatography Mass Spectroscopy

The foam produced by nymphs of Poophilus costalis on eleven different host plants belonging to eight families on St. Xavier’s College campus in India was studied over five months. The chemical composition and antimicrobial activity of these biofoams were investigated. The results revealed that P. costalis preferred Theporsia purpurea and Mimosa pudica for laying their eggs and producing foam, over the other tested plants. P. costalis produce their foam on either nodes or internodes on monocotyledons (30%) (p < 0.05), whereas on dicotyledons, they produce more foam on the stems (63.8%) than on the leaves (6.2%) (p < 0.01). The number of nymphs in each piece of foam from P. costalis varied from 1 to 3 (mean = 1.8 per plant). They produced their foam (5.7 to 45.2 cm) from the ground level on a plant. The length and breadth of a piece of foam ranged from 1.0 to 3.9 cm and 0.6 to 4.7 cm, respectively. The foam tended to be cooler than the environment. Qualitative profiling showed that the foam consists of carbohydrates, including maltose; trypsin; amino acids; protease. The foam was also analyzed using a spectrophotometer, Fourier transform infrared spectroscopy (FT-IR), gas chromatography–mass spectroscopy (GC-MS), and high-performance liquid chromatography (HPLC). The antimicrobial activity of the biofoam was the greatest against Staphylococcus aureus, the growth of which was reduced by 55.9 ± 3.9%, suggesting that the foam could be used as an antimicrobial product. However, no activities were observed against Fusarium oxysporum and Candida albicans.

Individual Differences in Attention and the Prediction of Flight Criteria

1971 ◽  
Vol 33 (3_suppl) ◽  
pp. 1335-1342 ◽  
Author(s):  
Daniel Gopher ◽  
Daniel Kahneman
Keyword(s):  
Individual Differences ◽  
Selective Attention ◽  
Dichotic Listening ◽  
High Performance ◽  
The Other ◽  
Listening Test ◽  
Transient Instability ◽  
High Performance Aircraft

A dichotic listening test was constructed which requires S to monitor a relevant message and to ignore a concurrent message presented to the other ear. The test has promising validity for predicting different criteria of proficiency in flying high-performance aircraft. An analysis of the most valid type of errors suggests that a change in an existing orientation is accompanied by a transient instability of selective attention. Most errors in continuous attention are omissions, which indicate a failure of the listening set. Intrusions, which indicate a failure of selectivity, are rare and their frequency is not correlated to flight criteria.

On the Chemistry of Tetrabenzyl Thiuram Disulfide and Tetramethyl Thiuram Disulfide with Bis (Triethoxysilylpropyl) Tetrasulfide in Silica Compounds

2003 ◽  
Vol 76 (4) ◽  
pp. 876-891 ◽  
Author(s):  
R. N. Datta ◽  
A. G. Talma ◽  
S. Datta ◽  
P. G. J. Nieuwenhuis ◽  
W. J. Nijenhuis ◽  
...  
Keyword(s):  
High Performance ◽  
Room Temperature ◽  
Succinic Anhydride ◽  
Dynamic Properties ◽  
The Other ◽  
Resonance Spectroscopy ◽  
Reaction Products ◽  
Negative Effect ◽  
Higher Temperature ◽  
Analytical Tools

Abstract The use of thiurams such as Tetramethyl thiuram disulfide (TMTD) or Tetrabenzyl thiuram disulfide (TBzTD) has been explored to achieve higher cure efficiency. The studies suggest that a clear difference exists between the effect of TMTD versus TBzTD. TMTD reacts with Bis (triethoxysilylpropyl) tetrasulfide (TESPT) and this reaction can take place even at room temperature. On the other hand, the reaction of TBzTD with TESPT is slow and takes place only at higher temperature. High Performance Liquid Chromatography (HPLC) with mass (MS) detection, Nuclear Magnetic Resonance Spectroscopy (NMR) and other analytical tools have been used to understand the differences between the reaction of TMTD and TESPT versus TBzTD and TESPT. The reaction products originating from these reactions are also identified. These studies indicate that unlike TMTD, TBzTD improves the cure efficiency allowing faster cure without significant effect on processing characteristics as well as dynamic properties. The loading of TESPT is reduced in a typical Green tire compound and the negative effect on viscosity is repaired by addition of anhydrides, such as succinic anhydride, maleic anhydride, etc.

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