The Experts below are selected from a list of 61017 Experts worldwide ranked by ideXlab platform
Gustavo Adolfo Saavedra Pinto - One of the best experts on this subject based on the ideXlab platform.
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optimization of ultrasound extraction of phenolic compounds from coconut cocos nucifera shell powder by response surface methodology
Ultrasonics Sonochemistry, 2008Co-Authors: Sueli Rodrigues, Gustavo Adolfo Saavedra Pinto, Fabiano A N FernandesAbstract:Coconut is a tropical fruit largely consumed in many countries. In some areas of the Brazilian coast, coconut shell represents more than 60% of the domestic Waste Volume. The coconut shell is composed mainly of lignin and cellulose, having a chemical composition very similar to wood and suitable for phenolic extraction. In this work, the use of ultrasound to extract phenolic compounds from coconut shell was evaluated. The effect of temperature, solution to solid ratio, pH and extraction time were evaluated through a 2(4) experimental planning. The extraction process was also optimized using surface response methodology. At the optimum operating condition (30 degrees C, solution to solid ratio of 50, 15 min of extraction and pH 6.5) the process yielded 22.44 mg of phenolic compounds per gram of coconut shell.
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ultrasound extraction of phenolic compounds from coconut cocos nucifera shell powder
Journal of Food Engineering, 2007Co-Authors: Sueli Rodrigues, Gustavo Adolfo Saavedra PintoAbstract:Coconut is a tropical fruit largely consumed in many countries. In some areas of the Brazilian coast, coconut shell represents more than 60% of the domestic Waste Volume. The shell is composed mainly of lignin and cellulose with chemical composition very similar to wood. As several kinds of wood are used as a phenolic source to produce extracts for artificial aging of alcoholic beverages, in this work, the coconut shell was evaluated as a source of phenolic compounds. The coconut powder was submitted to different toasting temperatures and the phenolic compounds were extracted by the application of ultrasound. The ultrasound extraction methodology has been studied as a low cost alternative in substitution to solvent reflux extraction. The experiments were done according to a factorial experimental planning and the effects of toasting time, toasting temperature and extraction time were evaluated through response surface methodology. The results indicate that high amounts of phenolics can be extracted from coconut shell by ultrasound assisted extraction technology, and that the extraction time was the most significant parameter for the process.
Sueli Rodrigues - One of the best experts on this subject based on the ideXlab platform.
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optimization of ultrasound extraction of phenolic compounds from coconut cocos nucifera shell powder by response surface methodology
Ultrasonics Sonochemistry, 2008Co-Authors: Sueli Rodrigues, Gustavo Adolfo Saavedra Pinto, Fabiano A N FernandesAbstract:Coconut is a tropical fruit largely consumed in many countries. In some areas of the Brazilian coast, coconut shell represents more than 60% of the domestic Waste Volume. The coconut shell is composed mainly of lignin and cellulose, having a chemical composition very similar to wood and suitable for phenolic extraction. In this work, the use of ultrasound to extract phenolic compounds from coconut shell was evaluated. The effect of temperature, solution to solid ratio, pH and extraction time were evaluated through a 2(4) experimental planning. The extraction process was also optimized using surface response methodology. At the optimum operating condition (30 degrees C, solution to solid ratio of 50, 15 min of extraction and pH 6.5) the process yielded 22.44 mg of phenolic compounds per gram of coconut shell.
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ultrasound extraction of phenolic compounds from coconut cocos nucifera shell powder
Journal of Food Engineering, 2007Co-Authors: Sueli Rodrigues, Gustavo Adolfo Saavedra PintoAbstract:Coconut is a tropical fruit largely consumed in many countries. In some areas of the Brazilian coast, coconut shell represents more than 60% of the domestic Waste Volume. The shell is composed mainly of lignin and cellulose with chemical composition very similar to wood. As several kinds of wood are used as a phenolic source to produce extracts for artificial aging of alcoholic beverages, in this work, the coconut shell was evaluated as a source of phenolic compounds. The coconut powder was submitted to different toasting temperatures and the phenolic compounds were extracted by the application of ultrasound. The ultrasound extraction methodology has been studied as a low cost alternative in substitution to solvent reflux extraction. The experiments were done according to a factorial experimental planning and the effects of toasting time, toasting temperature and extraction time were evaluated through response surface methodology. The results indicate that high amounts of phenolics can be extracted from coconut shell by ultrasound assisted extraction technology, and that the extraction time was the most significant parameter for the process.
Fabiano A N Fernandes - One of the best experts on this subject based on the ideXlab platform.
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optimization of ultrasound extraction of phenolic compounds from coconut cocos nucifera shell powder by response surface methodology
Ultrasonics Sonochemistry, 2008Co-Authors: Sueli Rodrigues, Gustavo Adolfo Saavedra Pinto, Fabiano A N FernandesAbstract:Coconut is a tropical fruit largely consumed in many countries. In some areas of the Brazilian coast, coconut shell represents more than 60% of the domestic Waste Volume. The coconut shell is composed mainly of lignin and cellulose, having a chemical composition very similar to wood and suitable for phenolic extraction. In this work, the use of ultrasound to extract phenolic compounds from coconut shell was evaluated. The effect of temperature, solution to solid ratio, pH and extraction time were evaluated through a 2(4) experimental planning. The extraction process was also optimized using surface response methodology. At the optimum operating condition (30 degrees C, solution to solid ratio of 50, 15 min of extraction and pH 6.5) the process yielded 22.44 mg of phenolic compounds per gram of coconut shell.
Sachio Fujine - One of the best experts on this subject based on the ideXlab platform.
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parc process for an advanced purex process
Progress in Nuclear Energy, 2000Co-Authors: Gunzo Uchiyama, Toshihide Asakura, Shinobu Hotoku, Hideaki Mineo, K Kamei, M Watanabe, Y Nakano, S Kimura, Sachio FujineAbstract:An advanced PUREX process, the PARC process, has been developed which aims to reduce the radioactive Waste Volume containing TRU elements (neptunium, plutonium, americium and curium) and the environmental hazard risk due to long-lived nuclides such as technetium-99, carbon-14 and iodine-129. This paper describes the concept of the PARC process and major results of chemical flow sheet experiments using spent fuels.
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the separation of neptunium and technetium in an advanced purex process
Solvent Extraction and Ion Exchange, 1998Co-Authors: Gunzo Uchiyama, Toshihide Asakura, Shinobu Hotoku, Sachio FujineAbstract:ABSTRACT An advanced PUREX process has been developed which can reduce TRU Waste Volume and the environmental hazard risk due to long-lived nuclides. The separation of neptunium and technetium from plutonium and uranium solutions has been studied before the U/ Pu partitioning step in the PUREX process. The effectiveness of normal-butyraldehyde as a reductant of Np( VI) to Np( V) and of high acid scrubbing of technetium was shown in a basic study and a chemical flowsheet study.
Gunzo Uchiyama - One of the best experts on this subject based on the ideXlab platform.
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parc process for an advanced purex process
Progress in Nuclear Energy, 2000Co-Authors: Gunzo Uchiyama, Toshihide Asakura, Shinobu Hotoku, Hideaki Mineo, K Kamei, M Watanabe, Y Nakano, S Kimura, Sachio FujineAbstract:An advanced PUREX process, the PARC process, has been developed which aims to reduce the radioactive Waste Volume containing TRU elements (neptunium, plutonium, americium and curium) and the environmental hazard risk due to long-lived nuclides such as technetium-99, carbon-14 and iodine-129. This paper describes the concept of the PARC process and major results of chemical flow sheet experiments using spent fuels.
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the separation of neptunium and technetium in an advanced purex process
Solvent Extraction and Ion Exchange, 1998Co-Authors: Gunzo Uchiyama, Toshihide Asakura, Shinobu Hotoku, Sachio FujineAbstract:ABSTRACT An advanced PUREX process has been developed which can reduce TRU Waste Volume and the environmental hazard risk due to long-lived nuclides. The separation of neptunium and technetium from plutonium and uranium solutions has been studied before the U/ Pu partitioning step in the PUREX process. The effectiveness of normal-butyraldehyde as a reductant of Np( VI) to Np( V) and of high acid scrubbing of technetium was shown in a basic study and a chemical flowsheet study.
