Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Article Citation - WoS: 1Citation - Scopus: 1Triploid Induction of Green Tiger Shrimp, Penaeus Semisulcatus (de Haan, 1844) Using Temperature and Chemical Shock(John Wiley and Sons Inc., 2015) Kır, Mehmet; Tarhan, Gökhan; Okur, Özgür; 01. Izmir Institute of TechnologyTriploidy in fertilized eggs of Penaeus semisulcatus was induced by temperature and chemical shocks. The eggs, which were obtained from the shrimp broodstock maintained at 29C, were exposed to cold temperature (8, 10, 12, and 14 C) and 6-dimetiloaminopurine (6-DMAP) concentrations (100, 150, 200, and 250 μM) for different durations (4, 6, and 8min) 9min after spawning was detected. While the highest triploidy rate of 49.7±4.5% was obtained with a 200μM 6-DMAP concentration for a duration of 8min, the best mean triploidy rate of 45.5±2.8% for cold shock was obtained at a temperature of 10 C for a duration of 8min. Temperature and 6-DMAP concentration did not have significant effect on triploidy rate (P>0.05) but shock duration had significant effect on triploidy rate for individual cold temperature shock or 6-DMAP chemical shock (P<0.05). Although longer durations of shock agent increased the rates of triploid induction, they generally had an adverse effect on hatching rates in the study.Article An Investigation of the Presence of Methane and Other Gases at the Uzundere-Izmir Solid Waste Disposal Site, Izmir, Turkey(Elsevier Ltd., 2003) Onargan, Turgay; Polat, Mehmet; Polat, Mehmet; 03.02. Department of Chemical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyIzmir is a large metropolitan city with a population of 3,114,860. The city consists of 27 townships, each township has a population of not less than 10,000 inhabitants. The two major solid waste disposal sites are in the townships of Uzundere and Harmandali. The amount of solid waste that is disposed at each of these sites is about 800 and 1800 t/day, respectively. In Uzundere, compost is produced from the organic fraction of urban solid wastes while the residual material is deposited at a disposal site with a remaining capacity of 700,000 m3 as of 2001. Gas monitoring and measurements were carried out at the disposal site in Uzundere. For this purpose, nine sampling wells were drilled on selected locations. Each well was furnished with perforated metal pipes suitable for gas monitoring and measurements. The following gases were monitored: O2, CH4, CO, CO 2, and H2S. The most important finding was that the concentrations of CH4 in the wells ranged from 7 to 57%. Dilution of the CH4 by O2 down to the LEL levels (5-15%) is always possible and poses a continuing risk at the site. Furthermore, the levels of O2 require that access to the site be limited to only authorized personnel