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Natural and organo-montmorillonite as antibacterial nanoclays for cotton garment
Ali Sadeghian Maryan,Majid Montazer 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.22 No.-
Here, antibacterial activities of the powder and colloidal forms of natural and organo-montmorillonite(Mt) and also clay mineral and the cotton fabrics treated with various Mt and clay mineral wereinvestigated against S. aurous as Gram-positive and E. coli as Gram-negative bacteria based on AATCC 100standardmethod. The durability of the treated cotton fabrics was also studied against home laundering. The cell cytotoxicity of natural and modified montmorillonite was assessed through MTT against cellfibroblast of human skin. The natural and organo-Mt in powder and colloid forms and also on the cottonfabrics indicated good antibacterial activities however clay mineral showed no antibacterial properties. Further, the kinetic of bacteria killing of treated cotton fabrics followed Chick–Watson model. Naturalmontmorillonite indicated lower cytotoxicity in comparison of cell viability of natural and modifiedmontmorillonite with human skin cell.
Data Buffering Multilevel Model at a Multiservice Traffic Service Node
Mykhailo Klymash,Maryan Kyryk,Nazar Pleskanka,Volodymyr Yanyshyn 한국산학기술학회 2014 SmartCR Vol.4 No.4
The basic principles of data buffering at a multiservice traffic service node were reviewed. A multilevel data buffering mode was proposed for nodes that serves a large amount of TCP traffic. Each level of the model has its own characteristics and is relatively independent. However, a malfunction of any one of them may adversely affect the efficiency of other levels. The network interface represents the physical level, which is the lowest. Packet routing occurs at the protocol level. Two queues provide communication between the physical layer (a network interface card) and the IP module. One is called the backlog and is used for incoming packets, while the other is called txqueue and works for outgoing packets. In current networks, the basis for data transmission is the TCP/IP protocol stack. It provides a set of tools to deliver data from one application to another. Optimization of the data buffering multilevel model to ensure a satisfactory quality of service in a multiservice data network was performed in this paper.
Hong Chan Ma,Damisih,Maryane Putri,Jong Hoon Cheon,김재홍,이희영 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.61 No.12
Indium-saving transparent conductive oxide (TCO) thin films, <i>i.e.</i>, zinc and tin co-doped indium oxide (IZTO) films, were investigated for dye-sensitized solar cell (DSSC) applications. The films were prepared by the radio-frequency (RF) magnetron sputtering method utilizing a ceramic target with a nominal composition equal to In<sub>0.6</sub>Zn<sub>0.2</sub>Sn<sub>0.2</sub>O<sub>1.5</sub>. The substrate temperature was changed from room temperature to 400 ℃ while the RF power and the argon gas pressure during deposition were kept constant. The photovoltaic conversion efficiencies of the DSSC samples made with IZTO electrodes were compared with the samples made with FTO electrodes. Values of approximately 6.81% and 4.74% were obtained for the DSSC samples with FTO and IZTO electrodes, respectively, when the firing process was carried out in air atmosphere during DSSC fabrication. However, with the addition of post-annealing in argon or a forming gas, efficiency values increased to 6.06% or 5.54%, respectively, for the DSSC sample with an IZTO electrode.
RF 마그네트론 스퍼터를 사용하여 증착한 IZTO 박막의 Zn/Sn 비율에 따른 효과
김기환,마리야느 푸트리,구창영,이정아,김정주,이희영,Kim, Ki Hwan,Putri, Maryane,Koo, Chang Young,Lee, Jung-A,Kim, Jeong-Joo,Lee, Hee Young 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.8
Indium Zinc Tin Oxide (IZTO) thin films were developed as an alternative to Indium Tin Oxide (ITO) thin films. ITO material which has been acknowledged with its low resistivity and optical transparency of 85-90% has been used as major transparent conducting oxide (TCO) materials. However, due to the limited source, high price, and instability problems at high temperature of indium, many researches has been focused on indium-saving TCO materials. Mason Group of Northwestern University was reported to expand the solubility limit up to 40% by co-doping with 1:1 ratio of $Zn^{+2}$ and $Sn^{+4}$ ions. In this study, the properties of IZTO thin films corresponding to Zn/Sn different ratio were investigated. In addition, the effect of substrate temperature variable to the structural, optical and electrical properties of IZTO thin films was investigated.
Aly A. Aly,Omima M. El-Mahdy,Marian M. Habeb,Abeer Elhakem,Amal A. Asran,Maryan M. Youssef,Heba I. Mohamed,Rania S. Hanafy 한국식물병리학회 2022 Plant Pathology Journal Vol.38 No.2
Pathogenicity of eight Bacillus strains to seedlings of four cotton cultivars was evaluated under greenhouse conditions. Each of the tested cultivars was individually treated with powdered inoculum of each bacterial strain. Untreated seeds were planted as control treatments in autoclaved soil. Effects of the tested strains on levels and activities of some biochemical components of the infected seedlings were also assayed. The biochemical components included total soluble sugars, total soluble proteins, total free amino acids, peroxidase, polyphenol oxidase, phenols, and lipid peroxidation. ANOVA showed that Bacillus strain (B) was a very highly significant source of variation in damping-off and dry weight. Cotton cultivar (V) was a nonsignificant source of variation in damping-off while it was a significant source of variation in dry weight. B × V interaction was a significant source of variation in damping- off and a nonsignificant source of variation in dry weight. Bacillus strain was the most important source of variation as it accounted for 59.36 and 64.99% of the explained (model) variation in damping-off and dry weight, respectively. The lack of significant correlation between levels and activities of the assayed biochemical components and incidence of damping-off clearly demonstrated that these biochemical components were not involved in the pathogenicity of the tested strains. Therefore, it was hypothesized that the pathogenicity of the tested strains could be due to the effect of cell wall degrading enzymes of pathogenic toxins. Based on the results of the present study, Bacillus strains should be considered in studying the etiology of cotton seedling damping-off.