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Öğe Determination of the bioenergy production capacity from biochemical profiles of some aquatic phytoremediation plants. Energy while cleaning(Scibulcom Ltd., 2014) Gunes A.; Cakar H.; Akat O.; Guney M.A.; Ozkul B.; Koru E.; Korkut A.Y.; Suzer C.; Cirik S.; Firat K.; Saka S.This study aims to research the possibilities of converting some hydrophytes into energy by revaluating them after the harvesting process. These hydrophytes used in the phytoremediation studies disperse naturally in aquatic mediums, sometimes even revealing themselves as invasive species. Chosen hydrophytes samples (Eichornia crassipes, Cyperus alternifolius, Lemna minor, Pistia stratiotes, Typha latifolia, Nasturtium officinale, Houttonia cordata) are analysed in terms of oil rate, biochemical profiles which include elaeostearic compositions, COI/T.20/Doc No 17 (capillary column gas chromatography) and in-house methods. The obtained data are analysed in comparison to the elaeostearics rate and compositions of the plants used in biodiesel procurement (canola, soy, palm, sunflower, Botryococcus and Chlorella oils). As a result, it is found that linolenic acid and linoleic acid percentages especially stand forth in the plants Eichornia sp., Cyperus sp., Lemna sp., the stearic and oleic acid percentages are significantly high in Pistia sp., and palmitic elaeostearic percentage is higher in the plants of Houttonia sp. and Nasturtium sp. than the plants currently used in biodiesel procurement, yet the oil rate within their system is lower than these plants. Moreover, it is thought that the plant waste obtained after the harvest carried out in order to ensure the water quality of the systems may in the least meet this deficit.Öğe Effects of light intensity, salinity and temperature on growth in Çamalti strain of Dunaliella viridis Teodoresco from Turkey(2008) Ak I.; Cirik S.; Göksan T.In this study, Dunaliella viridis was isolated from Çamalti salt work and its growth rate, cell density, chlorophyll-a and total carotenoids content were studied in a batch system. This strain was cultured at different NaCl concentrations (1, 2 and 3M), different temperatures (25 and 28°C) and different light intensities (50 and 75 µmol photon/m2/sec). In this experiment maximum growth rate was at 2 M salinity with 28°C temperature and 50 µmol photon/m2/sec light intensity. Maximum cell density for D. viridis was obtained at 25°C, 50 µmol photon/m2/sec, 2M cultures. The highest chlorophyll-a and total carotenoids were calculated as 2.84±0.50 and 1.11±0.05 pg cell-1, respectively. The optimum temperature and salinity for growth of D. viridis strain were around 25°C and 2 M NaCl. The present study shows that cell densities and pigment yields of D. viridis Çamalti strain are strongly dependant on salinity, temperature and light intensity. © 2008 Asian Network for Scientific Information.Öğe Greenhouse cultivation of Gracilaria verrucosa (Hudson) Papenfuss and determination of chemical composition [Gracilaria verrucosa (Hudson) Papenfuss'n?n Sera Koşullar?nda Yetiştiriciligi ve Kimyasal İçeriginin Belirlenmesi](2010) Cirik S.; Çetin Z.; Ak I.; Cirik S.; Göksan T.The agarophyte Gracilaria verrucosa (Hudson) Papenfuss was cultivated under greenhouse conditions in Modified Johnson Medium over a 5-month period. Biomass productivity ranged between 5.00 g L-1 to 16.37 g L-1 and the highest biomass was obtained in December. Relative growth rate (RGR) varied from 4.03±1.63 to 1.21±0.34% day-1. While the highest percentages of protein were found in December (20.28±0.94% of dw), the lowest percentages were in March (14.99±0.14% of dw). Phosphorus content ranged from 101.66±3.11 ppm (march) to 114.03±5.44 ppm (december). The lipid concentrations of G. verrucosa were measured within 2.39±0.77% dw and 2.66±0.94% dw. The agar yiel were determined between 9.65±1.12 and 18.64±2.38% of dw in december and march. The melting and gelling temperatures were stable through the experiment. The highest and the lowest values for both melting and gelling temperatures were 39.00±0.35°C (december) - 34.00±0.32°C (march) and 86.50±0.30°C (march) - 85.50±040°C (february), respectively. As a result of this study G. verrucosa could be cultivated in greenhouse conditions succesfully. Depending on the high growth rates, high concentrations of crude protein, phosphorus and agar of Gracilaria we conclude that it can be cultivated in greenhouse conditions. © Central Fisheries Research Institute (CFRI) Trabzon.Öğe Gulluk lagoon (Aegean Sea, Turkey) ecosystems [Gulluk lagunu (Ege Denizi, Turkiye) ekosistemi](1999) Egemen O.; Onen M.; Buyukisik B.; Hossucu B.; Sunlu U.; Gokpinar S.; Cirik S.Gulluk Lagoon has an area of 2500 decares with a depth of 0.5-5.0 m and is connected to Gulluk Bay by a channel. In this study, samplings of phytoplankton and benthos were taken and physico-chemical parameters were recorded monthly during 1993 at 5 stations. The temperature reached a minimum of 10.42°C in January and a maximum of 26.9°C in July, with a mean annual temperature of 19.53±1.511. The salinity in the lagoon ranged from 7.48‰ to 13.92‰ in January and March, respectively with a mean annual salinity of 10.65 ± 0.555. Dissolved oxygen in the sub-surface (0.25 m) water was 5.56 mg 1-1 in June and 9.06 mg 1-1 in February, with an annual mean 7.31 ± 0.331. The Secchi-disk depth was 1.12 m in May and 2.40 m in October. Nutrient measurements revealed moderately high levels of ammonia (ranging from 4.39 to 29.70 µg-at 1-1), low nitrate (0.81 to 17.87 µg-at 1-1), nitrite (0.19 to 1.35 µg-at 1-1), phosphate (0.01 to 0.45 µg-at 1-1), and silicon (0.26 to 6.00 µg-at 1-1). Chlorophyll a distribution generally indicated that productivity was highest in May (21.49 mg 1-1) and lowest in September (0.77 mg 1-1). Melosira moniliformis was the predominant phytoplankton species. All of the stations were characterized by high species diversity. Identification of the benthic species was carried out with 60 samples collected from 5 stations in a of one year period. As result 68 benthi species belonging to 7 taxa (Nemertina, Polychaeta, Oligochaeta, Crustacea, Mollusca, Insecta, Echinodermata) were identified. The polychaetae were numerically dominated by Notomastus latericeus (3737 individuals), followed by Hediste diversicolor (1524 individuals), and Spionidae (sp) (1361 individuals). Economically important fish species in Gulluk Lagoon consist of mullets (Mugil cephalus, M. capito, Chelon labrosus, Liza saliens), Sparus aurata (gilthead sea bream), Dicentrarchus labrax (sea bass), Solea solea (sole), Anguilla anguilla (eel) and Cyprinus carpio (carp), with an annuall yield varying from 10 to 69 tonnes.
