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CoNeT Mobile Laboratory for Ethernet Based I/O Systems in Industrial Applications
Levent Ucun,Onur Akbatı,Galip Cansever 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
This paper studies Ethernet based I/O systems in industrial applications. This study is involved in CoNeT, the European Union funded project, which stands for Cooperative Network Training. The project aims at training of automation engineers, maintenance engineers, process workers and students both graduate and undergraduate in modern wired and wireless industrial network technology applied to control operations and automated solutions. Seven modules dealing with different subjects about industrial automation have been designed in the concept of the project. This study has been carried out to design the first module which is about training in Ethernet based I/O systems. Mobile laboratory involving different industrial communication devices from different automation manufacturers has been founded and industrial application-oriented experiments have been designed to be carried out in the mobile laboratory.
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Biocides Effect on the Microbiologically Influenced Corrosion of Pure Copper by Desulfovibrio sp.
Onan, Mert,Ilhan-Sungur, Esra,Gungor, Nihal Dogruoz,Cansever, Nurhan The Korean Electrochemical Society 2018 Journal of electrochemical science and technology Vol.9 No.1
The aims of this study were to determine the corrosion behavior of pure copper in the presence of Desulfovibrio sp. and also to investigate the effects of glutaraldehyde (GD) and isothiazolinone (ISO) on the corrosion behavior of pure copper in the presence of this sulfate-reducing bacteria (SRB) strain by using electrochemical techniques. Electrochemical measurements of pure copper were carried out at specified time intervals (0, 8, 24, 48, and 96 hr) over a period of exposure. Corrosion rates of pure copper from anodic and cathodic Tafel slopes and corrosion potential ($E_{corr}$) were determined. Biofilm and corrosion products on the copper surfaces were observed by Field Emission Scanning Electron Microscopy (FESEM) and Energy Dispersive X-Ray Spectrometry (EDS) analyses. The effects of solution types (PC (Postgate's C medium) and SRB (Desulfovibrio sp.)) and exposure times of copper and biocides (ISO or GD) on the corrosion rates of pure copper were evaluated by statistical analyses. As a result of the FESEM analysis, biofilm formation was observed on the surfaces of pure copper exposed to the Desulfovibrio sp. cultures both with and without the biocides. The results show that the pure copper was corroded by Desulfovibrio sp. However, the addition of GD or ISO to the Desulfovibrio sp. culture resulted in a decrease in the corrosion rate of the pure copper. It was also observed that both of the biocides showed a similar effect on pure copper's corrosion rate caused by Desulfovibrio sp.
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Asuman Cansev,Hatice Gulen,Atilla Eris 한국원예학회 2011 Horticulture, Environment, and Biotechnology Vol.52 No.2
In this study, one-year-old shoots of the olive (Olea europaea L.) cv. Gemlik were tested at artificial low temperatures (4, -5℃, -10℃, and -20℃) every month for two years. For low temperature treatment, the degree of cell membrane injury in leaves and barks was determined by ion leakage method. In addition, with regard to antioxidative defense mechanism, activities of catalase (CAT, EC 1.11.1.6) and ascorbate peroxidase (APX, EC 1.11.1.11) enzymes were determined. Leaf and bark tissues subjected to 4℃ and -5℃ injured to a limited extent in all months. However, more than 50% injury occurred by temperatures equal to or colder than -10℃ treatments depending on the season. For -10℃ and -20℃ treatments, the lowest and the highest injury in leaf and bark tissues were detected during winter and summer seasons, respectively. We determined in this study that CAT and APX enzyme activities are generally higher during fall and winter compared with those in summer. On the other hand, CAT and APX enzyme activities started increasing during fall along with a decreasing freezing injury while the activities of these enzymes decreased to some extent during winter when freezing injury was the lowest. In addition, while CAT activity decreased with low temperature treatments, APX activity did not change until -5℃ treatment but decreased with decreasing temperatures starting from -10℃ depending on the month the tissue was obtained. In conclusion, olive plant shows considerable tolerance to low temperatures that are achieved after daily gradual decreases by increasing cell membrane stability through complicated mechanisms including antioxidative enzyme metabolisms. In addition, APX may be more effective in maintaining cold-hardiness of olive compared with CAT.
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Yasemin Sahan,Asuman Cansev,Hatice Gulen 한국식품과학회 2013 Food Science and Biotechnology Vol.22 No.3
In this study, olive fruits (Olea europeae cv. Gemlik) of the most common sources of table olives in Turkey were used. Total polyphenol content (TPC),antioxidant capacity (AC), and antioxidant enzymes (catalase, CAT; ascorbate peroxidase, APX; and glutathione reductase, GR) of table olives were compared by 4different methods of ripe table olive processing. Results revealed that TPC of the processed olives ranged from 117.44 to 418.69 mg gallic acid equivalents/g fresh weight (f.w.). The highest AC as mg Trolox equivalents of 189.58/g f.w. was obtained from unprocessed black olives. CAT,APX, and GR activities of unprocessed olives were higher than those obtained in all processed olives. In conclusion,TPC, AC, and antioxidant enzyme activities are strongly affected by fruit ripening and processing in table olives of ‘Gemlik’ cultivar. In addition, the best processing technique is untreated black olives in brine for antioxidant properties.
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