Polyester knitted fabrics have been equipped with antibacterial properties by coating with aqueous suspensions of zinc oxide (ZnO) with different particle diameters. It can be shown that the antibacterial efficacy aga...Polyester knitted fabrics have been equipped with antibacterial properties by coating with aqueous suspensions of zinc oxide (ZnO) with different particle diameters. It can be shown that the antibacterial efficacy against Staphylococcus aureus and Klebsiella pneumonia and the permanence of the coating after defined washing cycles depends on the composition of the ZnO dispersion. To improve the wettability of the textile, the combustion chemical vapor deposition (CCVD) is used to generate a hydrophilic nano layer of a hydroxyl terminated silicon network on the surface of the textiles. The comparison of CCVD-treated and untreated polyester samples does not show differences in the antibacterial activity. The influence of the coating in terms of amount and particle size of ZnO on the viability and proliferation of 3T3 mouse fibroblast cells is examined. A particle content of a maximum of 20 μg ZnO/cm2 is found to be cytocompatible for coating of textiles.展开更多
The present paper aims at numerical simulation of the intriguing experimental observations made by Bojarevics on the appearance of swirl in flows in an electrically induced flow.Although controlled by poloidal force,t...The present paper aims at numerical simulation of the intriguing experimental observations made by Bojarevics on the appearance of swirl in flows in an electrically induced flow.Although controlled by poloidal force,the flow rotates due to the presence of the earth magnetic field.The bulk flow rotates almost as a whole which indicates that the swirl is generated through a mechanism of"poloidal suppression".展开更多
A funnel-type mold is commonly used to provide necessary clearance for the submerged entry nozzle in the thin slab casting(TSC).The partially solidified shell is subjected to the mechanical deformations,which can lead...A funnel-type mold is commonly used to provide necessary clearance for the submerged entry nozzle in the thin slab casting(TSC).The partially solidified shell is subjected to the mechanical deformations,which can lead to the defects formation and,as a results,to a breakout.Traditionally,the results of the flow simulation,performed by the finite volume method(FVM),are fed to the external package for the finite element analysis of stress and strain.A coupled model was assembled using“creeping solid”approach by blending the Norton-Hoff viscoplastic stress for the solidifying shell with the Newtonian viscous stress of the liquid melt.The FVM was used to combine both liquid and solid stress models within a single solver.The iterative procedure based on the improved both side diffusion method was introduced to treat the nonlinear relation between the viscoplastic stress and the strain rate.The modeled shell thickness was verified by previously published breakout measurements and the simulation results.Temperature distribution,obtained during the TSC simulation,dominantly corresponds to the viscoplastic range.Developed numerical approach is robust and has direct industrial application.展开更多
Correction to:J.Iron Steel Res.Int.(2022)29:88-102 https://doi.Org/10.1007/s42243-021-00734-8The original version of this article unfortunately contained mistakes.The assignment of the affiliations was incorrect,and t...Correction to:J.Iron Steel Res.Int.(2022)29:88-102 https://doi.Org/10.1007/s42243-021-00734-8The original version of this article unfortunately contained mistakes.The assignment of the affiliations was incorrect,and the corrected table is given below.The original article has been corrected.展开更多
文摘Polyester knitted fabrics have been equipped with antibacterial properties by coating with aqueous suspensions of zinc oxide (ZnO) with different particle diameters. It can be shown that the antibacterial efficacy against Staphylococcus aureus and Klebsiella pneumonia and the permanence of the coating after defined washing cycles depends on the composition of the ZnO dispersion. To improve the wettability of the textile, the combustion chemical vapor deposition (CCVD) is used to generate a hydrophilic nano layer of a hydroxyl terminated silicon network on the surface of the textiles. The comparison of CCVD-treated and untreated polyester samples does not show differences in the antibacterial activity. The influence of the coating in terms of amount and particle size of ZnO on the viability and proliferation of 3T3 mouse fibroblast cells is examined. A particle content of a maximum of 20 μg ZnO/cm2 is found to be cytocompatible for coating of textiles.
基金Item Sponsored by the Austrian Federal Ministry of EconomyFamily and Youth and the National Foundation for ResearchTechnology and Development
文摘The present paper aims at numerical simulation of the intriguing experimental observations made by Bojarevics on the appearance of swirl in flows in an electrically induced flow.Although controlled by poloidal force,the flow rotates due to the presence of the earth magnetic field.The bulk flow rotates almost as a whole which indicates that the swirl is generated through a mechanism of"poloidal suppression".
基金the financial support by the Austrian Federal Ministry of Economy,Family and Youth and the National Foundation for Research,Technology and Development within the framework of the Christian Doppler Laboratory for Metallurgical Applications of Magnetohydrodynamics.
文摘A funnel-type mold is commonly used to provide necessary clearance for the submerged entry nozzle in the thin slab casting(TSC).The partially solidified shell is subjected to the mechanical deformations,which can lead to the defects formation and,as a results,to a breakout.Traditionally,the results of the flow simulation,performed by the finite volume method(FVM),are fed to the external package for the finite element analysis of stress and strain.A coupled model was assembled using“creeping solid”approach by blending the Norton-Hoff viscoplastic stress for the solidifying shell with the Newtonian viscous stress of the liquid melt.The FVM was used to combine both liquid and solid stress models within a single solver.The iterative procedure based on the improved both side diffusion method was introduced to treat the nonlinear relation between the viscoplastic stress and the strain rate.The modeled shell thickness was verified by previously published breakout measurements and the simulation results.Temperature distribution,obtained during the TSC simulation,dominantly corresponds to the viscoplastic range.Developed numerical approach is robust and has direct industrial application.
文摘Correction to:J.Iron Steel Res.Int.(2022)29:88-102 https://doi.Org/10.1007/s42243-021-00734-8The original version of this article unfortunately contained mistakes.The assignment of the affiliations was incorrect,and the corrected table is given below.The original article has been corrected.
