Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleAçık Erişim2024Scopus SJRQ3Lipid content and wastewater treatment potential of Chlorella vulgaris and Scenedesmus obliquus isolated from Uzuncaylr Dam Lake
Can, Şafak Seyhaneyildiz; Can, Erkan; Yilmaz, Kadir
Production of microalgae for biodiesel, one of the alternative renewable energy sources, is costly due to nutrient media. Industrial and domestic wastewater contains nitrogen, phosphorus and other nutrients that are the primary food source for algae. Releasing this environmentally harmful effluent into receiving bodies of water, such as the sea or a freshwater reservoir, without prior treatment causes serious problems. Combining microalgae cultivation with wastewater treatment is a promising strategy for improving wastewater and reducing the cost of nutrient media required for algae production. In this study, wastewater obtained from a wastewater treatment facility was diluted with clean water to 0.25%, 50%, and 75% concentrations, and Chlorella vulgaris and Scenedesmus obliquus were cultured in these nutrient media for 20 days. As a result, microalgae increased their biomass and lipid content, while consuming nitrite, nitrate, phosphate, and ammonium from the wastewater as nutrients.
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İncele - MakaleYalnız künye2018Scopus SJRQ1Evaluation of anesthetic potential of rosewood (Aniba rosaeodora) oil as a new anesthetic agent for goldfish (Carassius auratus)
Kizak, Volkan; Can, Erkan; Danabaş, Durali; Can, Şafak Seyhaneyildiz
The aim of this research was to investigate the efficacy of rosewood (Aniba rosaeodora) essential oil (EO) as a new herbal anesthetic compared with camphor (Cinnamomum camphora) EO and commonly used chemical agent 2-phenoxyethanol (2-PE) on goldfish (Carassius auratus). The anesthetic efficacies of these herbal EOs and 2-PE were evaluated in goldfish with mean body weight of 7.36 ± 0.77 g. Fish were exposed to each anesthetic concentrations and the lowest effective concentrations (LECs) were established according to deep anesthesia (AD < 3 min) and full recovery (RF < 5 min) times. RD and CP showed anesthetic characteristics and induced AD. The LECs for each anesthetic were established at 250 μl L−1 for RD (AD; RF → 171 ± 2.28 s; 297 ± 7.69 s), 250 μl L−1 for CP (AD; RF → 129 ± 4.18 s; 291 ± 2.81 s) and 700 μl L−1 for 2-PE (AD; RF → 177 ± 2.35 s; 214 ± 4.93 s). At concentrations of 50, 100, 150, 200 μl L−1 for RD, 50, 100, 150 μl L−1 for CP and 400, 500 μl L−1 for 2-PE failed to induce AD in goldfish. There were significantly differences found among RD, CP and 2-PE concentrations in terms of induction and recovery times (p < 0.05). The fastest AD and RF were obtained by 300 μl L−1 CP (120 ± 1.94 s) and 600 μl L−1 2-PE (190 ± 4.34 s), respectively. Fish exposed to 300 μl L−1 RD and 800 μl L−1 2-PE took slightly longer to achieve AD than 300 μl L−1 CP. Induction and recovery times for EOs and 2-PE were significantly dependent on concentrations. Negative relationships was recorded between AD and RF for all anesthetics. No mortality or adverse effects occurred and fish stayed calm during trials. Results showed that RD was found to be an effective anesthetic as well as CP for goldfish and can be used at least 3-fold lower concentrations than 2-PE. In conclusion, rosewood (Aniba rosaeodora) EO, as a new potential anesthetic for fish, proved to be an effective natural agent resulting in rapid induction and recovery.
AtıfScopus25WoS20OpenAlex23İncele - MakaleYalnız künye2018Scopus SJRQ3Anesthetic efficacy of cymbopogon citratus essential oil as a herbal agent in two ornamental fish species
Kizak, Volkan; Can, Erkan; Can, Şafak Seyhaneyildiz; Özçiçek, Esin
The efficacy of Cymbopogon citratus essential oil (CcEO) as a herbal anesthetic agent was evaluated for two ornamental fish species, Sciaenochromis fryeri and Labidochromis caeruleus. Fish were exposed to various essential oil concentrations and the lowest effective concentrations were determined according to deep anesthesia (AD<3 min) and full recovery (RF<10 min) times. CcEO showed anesthetic traits and induced AD in S. fryeri and L. caeruleus. The lowest effective concentrations was 200 µl/L for S. fryeri (AD; RF → 122 ± 1.8 s; 638 ± 8.9 s) and 200 µl/L for L. caeruleus (AD; RF → 139 ± 6.9 s; 625 ± 11.1 s). At concentration of 25 µl/L C. citratus essential oil did not induce AD in both of ornamental fish species. No significant differences were found between fish species in terms of induction and recovery times for same concentrations excluding AD time of 200 µl/L concentration. Although the fastest AD were obtained by 300 µl/L, recovery times were prolonged and fish did not full recover in 20 min. Induction and recovery times for CcEO were significantly dependent on concentrations and negative relationships were recorded between AD and RF. Neither mortality nor adverse effects were observed on two fish species. As a result, CcEO showed anesthetic properties for S. fryeri and L. caeruleus.
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