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Optimization of carbohydrate productivity of Spirulina microalgae as a potential feedstock for bioethanol production
, Article International Journal of Environmental Science and Technology ; Volume 16, Issue 3 , 2019 , Pages 1303-1318 ; 17351472 (ISSN) ; Baghdadi, M ; Torang, A ; Sarkhosh, S ; Sharif University of Technology
Center for Environmental and Energy Research and Studies
2019
Abstract
The main goal of this research is to use the biomass productivity, carbohydrate content, and carbohydrate productivity as useful responses for optimization of macronutrients concentrations (K2HPO4, NaHCO3, and NaNO3) in cultivation of Spirulina microalgae as a feedstock for bioethanol production. In this study, individual and synergistic effects of medium components on the mentioned responses were investigated. The culture medium was optimized using central composite design for achieving the maximize biomass productivity (165 mg L−1 day−1 at K2HPO4: 438 mg L−1, NaHCO3: 15.92 g L−1, and NaNO3: 0.5 g L−1), carbohydrate content (42.0% of dry mass at K2HPO4: 192 mg L−1, NaHCO3: 5.71 g L−1, and...
Asparaginase Effect on Acrylamide Reduction During Food Processing
, M.Sc. Thesis Sharif University of Technology ; Aalemzadeh, Iran (Supervisor) ; Vossoughi, Manoochehr (Supervisor)
Abstract
In recent year's acrylamide as a suspected substance for tumor growth has been studied. In some researches this topic is mentioned that acrylamide is produced by the reaction of asparagine and natural sugars. This reaction takes place only at very high temperatures during the heating process. The maximum amount of this substance is determined in fried potato products. The purpose of this study was determined to remove and reduce acrylamide formation during frying of potato. Acrylamide production when it was blanching and when it was dipped in the enzyme solution of asparaginase was examined. When potato pieces were placed in a commercial enzyme solution 200 lU/ml, acrylamide formation was...