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Inês Conceição Roberto - One of the best experts on this subject based on the ideXlab platform.
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Ferulic and p-coumaric acids extraction by Alkaline Hydrolysis of brewer's spent grain
Industrial Crops and Products, 2007Co-Authors: Solange Inês Mussatto, Giuliano Dragone, Inês Conceição RobertoAbstract:Abstract This work deals with the Alkaline Hydrolysis of brewer's spent grain (BSG) for the extraction of ferulic and p- coumaric acids, compounds of considerable interest for applications in the food, health, cosmetic, and pharmaceutical industries. A 2 3 full factorial design with three replicates at the center point was used to investigate the simultaneous effects of the variables: NaOH concentration (1.0, 1.5 and 2.0%, w/v), temperature (80, 100 and 120 °C), and reaction time (30, 60 and 90 min), on the Alkaline Hydrolysis. The assays were performed using a solid:liquid ratio of 1:20 (w/w). The Student's t -test revealed a positive influence ( p p -coumaric acids extraction from BSG. Linear models were well fitted ( R 2 > 0.90) to the experimental data to describe the extraction of these acids as a function of the operational variables employed. The best Alkaline Hydrolysis conditions consisted in using a 2% NaOH concentration, at 120 °C for 90 min. Under these conditions, a liquor containing 145.3 mg/l ferulic acid and 138.8 mg/l p -coumaric acid was obtained. These values corresponded to 9.65 mg ferulic acid and 9.22 mg p -coumaric acid per gram of solubilized lignin.
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ferulic and p coumaric acids extraction by Alkaline Hydrolysis of brewer s spent grain
Industrial Crops and Products, 2007Co-Authors: Solange Inês Mussatto, Giuliano Dragone, Inês Conceição RobertoAbstract:Abstract This work deals with the Alkaline Hydrolysis of brewer's spent grain (BSG) for the extraction of ferulic and p-coumaric acids, compounds of considerable interest for applications in the food, health, cosmetic, and pharmaceutical industries. A 23 full factorial design with three replicates at the center point was used to investigate the simultaneous effects of the variables: NaOH concentration (1.0, 1.5 and 2.0%, w/v), temperature (80, 100 and 120 °C), and reaction time (30, 60 and 90 min), on the Alkaline Hydrolysis. The assays were performed using a solid:liquid ratio of 1:20 (w/w). The Student's t-test revealed a positive influence (p 0.90) to the experimental data to describe the extraction of these acids as a function of the operational variables employed. The best Alkaline Hydrolysis conditions consisted in using a 2% NaOH concentration, at 120 °C for 90 min. Under these conditions, a liquor containing 145.3 mg/l ferulic acid and 138.8 mg/l p-coumaric acid was obtained. These values corresponded to 9.65 mg ferulic acid and 9.22 mg p-coumaric acid per gram of solubilized lignin.
Solange Inês Mussatto - One of the best experts on this subject based on the ideXlab platform.
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Ferulic and p-coumaric acids extraction by Alkaline Hydrolysis of brewer's spent grain
Industrial Crops and Products, 2007Co-Authors: Solange Inês Mussatto, Giuliano Dragone, Inês Conceição RobertoAbstract:Abstract This work deals with the Alkaline Hydrolysis of brewer's spent grain (BSG) for the extraction of ferulic and p- coumaric acids, compounds of considerable interest for applications in the food, health, cosmetic, and pharmaceutical industries. A 2 3 full factorial design with three replicates at the center point was used to investigate the simultaneous effects of the variables: NaOH concentration (1.0, 1.5 and 2.0%, w/v), temperature (80, 100 and 120 °C), and reaction time (30, 60 and 90 min), on the Alkaline Hydrolysis. The assays were performed using a solid:liquid ratio of 1:20 (w/w). The Student's t -test revealed a positive influence ( p p -coumaric acids extraction from BSG. Linear models were well fitted ( R 2 > 0.90) to the experimental data to describe the extraction of these acids as a function of the operational variables employed. The best Alkaline Hydrolysis conditions consisted in using a 2% NaOH concentration, at 120 °C for 90 min. Under these conditions, a liquor containing 145.3 mg/l ferulic acid and 138.8 mg/l p -coumaric acid was obtained. These values corresponded to 9.65 mg ferulic acid and 9.22 mg p -coumaric acid per gram of solubilized lignin.
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ferulic and p coumaric acids extraction by Alkaline Hydrolysis of brewer s spent grain
Industrial Crops and Products, 2007Co-Authors: Solange Inês Mussatto, Giuliano Dragone, Inês Conceição RobertoAbstract:Abstract This work deals with the Alkaline Hydrolysis of brewer's spent grain (BSG) for the extraction of ferulic and p-coumaric acids, compounds of considerable interest for applications in the food, health, cosmetic, and pharmaceutical industries. A 23 full factorial design with three replicates at the center point was used to investigate the simultaneous effects of the variables: NaOH concentration (1.0, 1.5 and 2.0%, w/v), temperature (80, 100 and 120 °C), and reaction time (30, 60 and 90 min), on the Alkaline Hydrolysis. The assays were performed using a solid:liquid ratio of 1:20 (w/w). The Student's t-test revealed a positive influence (p 0.90) to the experimental data to describe the extraction of these acids as a function of the operational variables employed. The best Alkaline Hydrolysis conditions consisted in using a 2% NaOH concentration, at 120 °C for 90 min. Under these conditions, a liquor containing 145.3 mg/l ferulic acid and 138.8 mg/l p-coumaric acid was obtained. These values corresponded to 9.65 mg ferulic acid and 9.22 mg p-coumaric acid per gram of solubilized lignin.
Yongyou Hu - One of the best experts on this subject based on the ideXlab platform.
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recovery of phosphorus and nitrogen from Alkaline Hydrolysis supernatant of excess sludge by magnesium ammonium phosphate
Bioresource Technology, 2014Co-Authors: Wei Bi, Yiyong Li, Yongyou HuAbstract:Abstract Magnesium ammonium phosphate (MAP) method was used to recover orthophosphate (PO43−-P) and ammonium nitrogen (NH4+-N) from the Alkaline Hydrolysis supernatant of excess sludge. To reduce alkali consumption and decrease the pH of the supernatant, two-stage Alkaline Hydrolysis process (TSAHP) was designed. The results showed that the release efficiencies of PO43−-P and NH4+-N were 41.96% and 7.78%, respectively, and the pH of the supernatant was below 10.5 under the running conditions with initial pH of 13, volume ratio (sludge dosage/water dosage) of 1.75 in second-stage Alkaline Hydrolysis reactor, 20 g/L of sludge concentration in first-stage Alkaline Hydrolysis reactor. The order of parameters influencing MAP reaction was analyzed and the optimized conditions of MAP reaction were predicted through the response surface methodology. The recovery rates of PO43−-P and NH4+-N were 46.88% and 16.54%, respectively under the optimized conditions of Mg/P of 1.8, pH 9.7 and reaction time of 15 min.
Kjeld Ingvorsen - One of the best experts on this subject based on the ideXlab platform.
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Survival of prokaryotes in a polluted waste dump during remediation by Alkaline Hydrolysis
Ecotoxicology, 2014Co-Authors: Marie Bank Nielsen, Kasper Urup Kjeldsen, Mark Alexander Lever, Kjeld IngvorsenAbstract:A combination of culture-dependent and culture-independent techniques was used to characterize bacterial and archaeal communities in a highly polluted waste dump and to assess the effect of remediation by Alkaline Hydrolysis on these communities. This waste dump (Breakwater 42), located in Denmark, contains approximately 100 different toxic compounds including large amounts of organophosphorous pesticides such as parathions. The Alkaline Hydrolysis (12 months at pH >12) decimated bacterial and archaeal abundances, as estimated by 16S rRNA gene–based qPCR, from 2.1 × 10^4 and 2.9 × 10^3 gene copies per gram wet soil respectively to below the detection limit of the qPCR assay. Clone libraries constructed from PCR-amplified 16S rRNA gene fragments showed a significant reduction in bacterial diversity as a result of the Alkaline Hydrolysis, with preferential survival of Betaproteobacteria, which increased in relative abundance from 0 to 48 %. Many of the bacterial clone sequences and the 27 isolates were related to known xenobiotic degraders. An archaeal clone library from a non-hydrolyzed sample showed the presence of three main clusters, two representing methanogens and one representing marine aerobic ammonia oxidizers. Isolation of alkalitolerant bacterial pure cultures from the hydrolyzed soil confirmed that although Alkaline Hydrolysis severely reduces microbial community diversity and size certain bacteria survive a prolonged Alkaline Hydrolysis process. Some of the isolates from the hydrolyzed soil were capable of growing at high pH (pH 10.0) in synthetic media indicating that they could become active in in situ biodegradation upon Hydrolysis.
Giuliano Dragone - One of the best experts on this subject based on the ideXlab platform.
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Ferulic and p-coumaric acids extraction by Alkaline Hydrolysis of brewer's spent grain
Industrial Crops and Products, 2007Co-Authors: Solange Inês Mussatto, Giuliano Dragone, Inês Conceição RobertoAbstract:Abstract This work deals with the Alkaline Hydrolysis of brewer's spent grain (BSG) for the extraction of ferulic and p- coumaric acids, compounds of considerable interest for applications in the food, health, cosmetic, and pharmaceutical industries. A 2 3 full factorial design with three replicates at the center point was used to investigate the simultaneous effects of the variables: NaOH concentration (1.0, 1.5 and 2.0%, w/v), temperature (80, 100 and 120 °C), and reaction time (30, 60 and 90 min), on the Alkaline Hydrolysis. The assays were performed using a solid:liquid ratio of 1:20 (w/w). The Student's t -test revealed a positive influence ( p p -coumaric acids extraction from BSG. Linear models were well fitted ( R 2 > 0.90) to the experimental data to describe the extraction of these acids as a function of the operational variables employed. The best Alkaline Hydrolysis conditions consisted in using a 2% NaOH concentration, at 120 °C for 90 min. Under these conditions, a liquor containing 145.3 mg/l ferulic acid and 138.8 mg/l p -coumaric acid was obtained. These values corresponded to 9.65 mg ferulic acid and 9.22 mg p -coumaric acid per gram of solubilized lignin.
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ferulic and p coumaric acids extraction by Alkaline Hydrolysis of brewer s spent grain
Industrial Crops and Products, 2007Co-Authors: Solange Inês Mussatto, Giuliano Dragone, Inês Conceição RobertoAbstract:Abstract This work deals with the Alkaline Hydrolysis of brewer's spent grain (BSG) for the extraction of ferulic and p-coumaric acids, compounds of considerable interest for applications in the food, health, cosmetic, and pharmaceutical industries. A 23 full factorial design with three replicates at the center point was used to investigate the simultaneous effects of the variables: NaOH concentration (1.0, 1.5 and 2.0%, w/v), temperature (80, 100 and 120 °C), and reaction time (30, 60 and 90 min), on the Alkaline Hydrolysis. The assays were performed using a solid:liquid ratio of 1:20 (w/w). The Student's t-test revealed a positive influence (p 0.90) to the experimental data to describe the extraction of these acids as a function of the operational variables employed. The best Alkaline Hydrolysis conditions consisted in using a 2% NaOH concentration, at 120 °C for 90 min. Under these conditions, a liquor containing 145.3 mg/l ferulic acid and 138.8 mg/l p-coumaric acid was obtained. These values corresponded to 9.65 mg ferulic acid and 9.22 mg p-coumaric acid per gram of solubilized lignin.
