Browsing by Author "Erbil, G.Ç."

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Acceptability of Different Concentrations of Chlorella sp. in Filipino Delicacy Puto as Coloring Agent
(2024) Sarrı, J.H.; Erbil, G.Ç.; Elp, M.; Kadak, A.E.
Natural colorants play a crucial role in food product development and improvement of health. Microalga Chlorella sp. is one of the sources of natural colorant. In this study, different concentrations of microalga Chlorella sp. (0.5, 1, and 2%) were added to Puto as coloring agents to evaluate its sensory properties. Pigments such as chlorophyll a and total carotenoid quantities of Chlorella powder and the experimental group were also investigated. It was found that the natural colorant Chlorella sp. at all levels of concentrations did not affect the color properties (p≥0.05) of the Puto products. However, the smell and texture of Puto differed significantly (p≤0.05) when 2% Chlorella sp. was incorporated. The study also found that the 0.5% and 1% amounts of Chlorella sp. component did not significantly affect (p≥0.05) the Puto’s taste and overall acceptability. However, the 2% level of Chlorella sp. significantly decreased both overall acceptability and taste attributes. Moreover, Chlorella sp. powder constituted 4004.79±119.1 µg g-1 chlorophyll a and 1442.67±74.41 µg g-1 total carotenoids. Chlorophyll a amounts in experimental groups varied from 14.34±0.49 µg g-1 to 54.06±1.71 µg g-1 while total carotenoids amounts were found ranging from 5.59±0.37 µg g-1 and 18.06±0.66 µg g-1. Puto used these biomasses at a concentration of 0.5%, 1%, and 2% as natural green colorants. However, chlorophyll a and carotenoid pigments level at 2% Chlorella sp. were not tolerable for the production of Puto. Hence, the Chlorella sp. biomass at 0.5% and 1% would be suitable for use as a natural colorant in the Filipino delicacy Puto.
Myo-inositol as a carbon source in Chlorella sp. production
(Elsevier Ltd, 2024) Erbil, G.Ç.; Elp, M.; Durmaz, Y.
The study aimed to investigate the possible use of myo-inositol as a carbon source in Chlorella sp. culture. Firstly, experiments were conducted with different myo-inositol concentrations and glycerol in flasks. Secondly, a laboratory-scale tubular photobioreactor (PBR) was operated with CO2 and myo-inositol to determine performance under industrial production conditions. The highest dry weight of the experiments with flasks was 1.62 ± 0.02 g.L−1 and was obtained with 1 g.L−1 myo-inositol concentration. Myo-inositol yielded two times higher lipid accumulation compared to glycerol in the experiment with flasks and 12 % compared to CO2 in the PBR experiment. The results revealed that myo-inositol is one of the most efficient carbon sources with 0.86 CBCR (carbon to biomass conversion rate). Even if myo-inositol is more expensive than many carbon sources such as CO2, high efficiency and less light energy expenses make it a competitive carbon source in Chlorella sp. production.
Myo-inositol as a carbon source in Chlorella sp. production
(2024.01.01) Erbil, G.Ç.; Elp, M.; Durmaz, Y.
The study aimed to investigate the possible use of myo-inositol as a carbon source in Chlorella sp. culture. Firstly, experiments were conducted with different myo-inositol concentrations and glycerol in flasks. Secondly, a laboratory-scale tubular photobioreactor (PBR) was operated with CO2 and myo-inositol to determine performance under industrial production conditions. The highest dry weight of the experiments with flasks was 1.62 +/- 0.02 g.L-1 and was obtained with 1 g.L-1 myo-inositol concentration. Myo-inositol yielded two times higher lipid accumulation compared to glycerol in the experiment with flasks and 12 % compared to CO2 in the PBR experiment. The results revealed that myo-inositol is one of the most efficient carbon sources with 0.86 CBCR (carbon to biomass conversion rate). Even if myo-inositol is more expensive than many carbon sources such as CO2, high efficiency and less light energy expenses make it a competitive carbon source in Chlorella sp. production.