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Assessment of sugarcane trash for agronomic and energy purposes in Brazil Scientia Agricola
Franco,Henrique Coutinho Junqueira; Pimenta,Maria Teresa Borges; Carvalho,João Luís Nunes; Magalhães,Paulo Sérgio Graziano; Rossell,Carlos Eduardo Vaz; Braunbeck,Oscar Antonio; Vitti,André Cesar; Kölln,Oriel Tiago; Rossi Neto,João.
Due to new possibilities for using sugarcane (Saccharum spp.) trash for electricity generation, and the production of 2nd generation ethanol and others chemicals, the interest for its recovery has increased. However, the question of how much trash can be removed from sugarcane field still needs to be clarified. This study evaluated the amount of dry matter, nutrients content, structural compounds and efficiency of the enzymatic hydrolysis of the hydrothermal pretreated materials for tops and dry leaves in samples from sugarcane varieties. Tops and dry leaves present differences in nutrients content and moisture. Therefore, the amount of trash to be collected should not be simply based on percentages, but also should take into account the different...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Saccharum spp.; Enzymatic hydrolysis; Sugarcane crop residues.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000500004
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Atividade microbiológica em solos sob cultivo de cana de açúcar. Repositório Alice
SOUZA, A. M.; VIEIRA, R. F.; RAMOS, N. P.; GONCALVES, J. R. P..
Resumo: O objetivo deste trabalho foi avaliar a atividade microbiológica e enzimática de solos cultivados com cana de açúcar. Os solos, Latossolo Roxo, foram coletados em área de 1 ano de corte A(1), três anos de corte D(3), cinco anos de corte C(5) e 8 anos de corte H(8), nas profundidades de 0-10 cm e 10-20 cm. O solo A(1), ao contrário dos outros, recebe regulares aplicações de vinhaça. Os parâmetros avaliados foram: atividade de hidrólise do diacetato de fluoresceína (HDF), potencial de mineralização de N (PMN) e atividades das enzimas glucosidase e urease. O solo C(5) apresentou os melhores resultados em termos de atividade por unidade de C orgânico do solo. Ressalta-se, porém, que as variabilidades dos dados obtidos foram altas, evidenciando a...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Microbiologia do solo; Cana de açúcar; Latossolo roxo; Soil biology; Microbiological quality; Enzymatic hydrolysis; Sugarcane.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/944535
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Avaliação do potencial antioxidante de proteínas do soro de leite concentradas por ultrafiltração e hidrolisadas por diferentes proteases comerciais. Repositório Alice
SOUZA, R. S. C. de; TONON, R. V.; STEPHAN, M. P.; SILVA, C. M.; PENTEADO, A. L.; CABRAL, L. M. C.; KUROZAWA, L. E..
Resumo: O objetivo do trabalho foi avaliar as atividades antioxidante e antimicrobiana de hidrolisados proteicos de soro de leite obtidos por diferentes proteases (Alcalase e Flavourzyme) e sua mistura (proporção 50:50). Previamente à hidrólise enzimática, o soro de leite foi concentrado por ultrafiltração com membranas cerâmicas tubulares. A reação enzimática foi realizada de acordo com o método pH-stat, sendo coletadas alíquotas com diferentes graus de hidrólise ( GH), ao longo de cada hidrólise proteica. Os hidrolisados foram analisados quanto a estimativa do teor de peptídeos, atividade antioxidante pelos métodos de captura do radical livre ABTS+ e do radical peroxila (Oxygen radical antioxidant capacity - ORAC), eletroforese e atividade...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Hidrólise enzimática; Grau de hidrólise; Capacidade antioxidante; Degree of hydrolysis; Soro de Leite; Proteína; Antioxidante; Proteína Hidrolisada; Peptídeo; Eletroforese; Peptides; Whey; Enzymatic hydrolysis; Antioxidant activity; Electrophoresis.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1115788
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Bioethanol production from rice straw residues BJM
Belal,Elsayed B..
A rice straw -cellulose utilizing mold was isolated from rotted rice straw residues. The efficient rice straw degrading microorganism was identified as Trichoderma reesei. The results showed that different carbon sources in liquid culture such as rice straw, carboxymethyl cellulose, filter paper, sugar cane bagasse, cotton stalk and banana stalk induced T. reesei cellulase production whereas glucose or Potato Dextrose repressed the synthesis of cellulase. T. reesei cellulase was produced by the solid state culture on rice straw medium. The optimal pH and temperature for T. reesei cellulase production were 6 and 25 ºC, respectively. Rice straw exhibited different susceptibilities towards cellulase to their conversion to reducing sugars. The present study...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cellulase; Trichoderma reesei; Rice straw residues; Enzymatic hydrolysis; Bioethanol.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000100033
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Cassava Pulp Enzymatic Hydrolysate as a Promising Feedstock for Ethanol Production BABT
Valeriano,Ixthá Hasselmann; Marques,Gabriel Lessa Lisboa; Freitas,Suely Pereira; Couri,Sonia; Penha,Edmar das Mercês; Gonçalves,Márcia Monteiro Machado.
ABSTRACT The aim of this study was to produce bioethanol from enzymatic hydrolysates of cassava pulp, a by-product of cassava flour manufacturing, using an alcohol-tolerant Saccharomyces cerevisiae strain. First, the best operational condition of the starch hydrolysis process was determined through a complete factorial design (24), with triplicates at the central point. The independent variables evaluated were: the concentrations of α-amylase (Termamyl 2X) and glucoamylase (AMG 300L) and both liquefaction and saccharification times. The most favorable hydrolysis condition in the assay was achieved using 0.517 mL AMG.g starch-1 and 0.270 mL Termamyl.g starch-1, with liquefaction and saccharification times of 1 and 2 h, respectively. The broth obtained at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Starch waste; Enzymatic hydrolysis; Alcoholic fermentation.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100207
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Chemical pretreatment of Arundo donax L. for second-generation ethanol production. Repositório Alice
LEMÕES, J. S.; SILVA, C. F. L. e.; AVILA, S. P. F.; MONTERO, C. R. S.; SILVA, S. D. dos A. e; SAMIOS, D.; PERALBA, M. do C. R..
bitstream/item/187160/1/Sergio-Delmar-Chemical-pretreatment-of-Arundo-donax-L...r-second-generation.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Acid pretreatment; Alkaline pretreatment; Arundo biomass; Biofuel; Giant reed; Xylose Raw material; Enzymatic hydrolysis; Glucose; Lignocellulose; Response surface methodology.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1100191
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Clarification of pineapple juice by microfiltration Ciênc. Tecnol. Aliment.
Carvalho,Lucia Maria Jaeger de; Silva,Carlos Alberto Bento da.
In the present work, pineapple juice was first hydrolyzed with a commercial pectinase (Ultrazym 100 G) and then clarified by microfiltration. A tubular polyethersulfone membrane with an average cut-off of 0.3 µm and a total effective filtration area of 0.05 m² was applied. The transmembrane pressures were 1.5 and 3.0 bar, respectively, and the processes was conducted at room temperature. The results showed that the pineapple juice permeate fluxes were of 57.77 L/m²/hours (1.5 bar) and 46.85 L/m²/hours (3.0 bar). Concentration polarization and possibly fouling occurred during the processes. The best clarified juice fluxes were obtained when low transmembrane pressures (1.5 bar) were applied.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fruit juice; Enzymatic hydrolysis; Membrane processes.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612010000300040
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Destoxificação da torta de mamona por diferentes soluções de óxido de cálcio. Repositório Alice
FEITOSA, T. S.; ANDRADE, I. R. A. de; POMPEU, R. C. F. F.; CÂNDIDO, M. J. D.; SALLES, H. O.; EGITO, A. S. do..
2014
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Destoxificação; Ricinus aglutinina; Mamona; Torta; Ricinus communis; Eletroforese; Ricina; Hidrólise; Óxido de cálcio; Lectina; Castor bean; Hydrolysis; Detoxification; Enzymatic hydrolysis; Digestibility; Calcium oxide; Lectins.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/993315
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Effects of hydrolysis and digestion in vitro on the activity of bovine plasma hydrolysates as inhibitors of the angiotensin I converting enzyme BABT
Gómez Sampedro,Leidy Johanna; Zapata Montoya,José Edgar.
The angiotensin I-converting enzyme (ACE) inhibiting activity of bovine plasma hydrolyzates obtained by Alcalase 2.4 L at different degrees of hydrolysis (DH) was evaluated. For the evaluation of ACE inhibition (ACEI), Hippuryl-His-Leu was used as substrate and the amount of hippuric acid liberated by non-inhibiting ACE was determined by spectrophotometry at 228 nm. The results showed that the enzymatic hydrolysis increased the ACEI activity as compared with the un-hydrolyzed plasma. The highest activity was onbtained with a DH of 6.7%. The peptide fractions with the maximum activity were isolated using ultrafiltration membranes, ion exchange chromatography and high performance liquid chromatography on reverse phase (RP-HPLC). The fraction with highest...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Enzymatic hydrolysis; Bioactive peptides; Angiotensin I-converting enzyme inhibitors; Peptide sequence.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000300012
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Effects of surface proteins and lipids on molecular structure, thermal properties, and enzymatic hydrolysis of rice starch Ciênc. Tecnol. Aliment.
HU,Pan; FAN,Xiaoxu; LIN,Lingshang; WANG,Juan; ZHANG,Long; WEI,Cunxu.
Abstract Rice starches with different amylose contents were treated with sodium dodecyl sulfate (SDS) to deplete surface proteins and lipids, and the changes in molecular structure, thermal properties, and enzymatic hydrolysis were evaluated. SDS treatment did not significantly change the molecular weight distribution, crystalline structure, short-range ordered degree, and gelatinization properties of starch, but significantly altered the pasting properties and increased the swelling power of starch. The removal of surface proteins and lipids increased the enzymatic hydrolysis and in vitro digestion of starch. The influences of removing surface proteins and lipids from starch on swelling power, pasting properties, and enzymatic hydrolysis were different...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Enzymatic hydrolysis; Molecular structure; Rice starch; Surface proteins and lipids; Thermal properties.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000100084
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Enzymatic hydrolysis of raw and pre-treated Eucalyptus. Repositório Alice
COLOMBI, B. L.; HEINZ, K. G. H.; ZANONI, P. R. S.; MAGALHAES, W. L. E.; TAVARES, L. B. B..
Ethanol from lignocellulosic biomass (LCB), such as agricultural and forest residues, is known as the second generation (2G) ethanol. Carbohydrate fractions in LCB (cellulose and hemicellulose) are not readily available for microbial fermentation and they need to be released by additional pre-treatment and hydrolysis operations. This process is intrinsically more difficult and costly. In this study the efficiency of enzymatic hydrolysis of the species Eucalyptus urophylla and the hybrid E. urophylla x E. grandis, submitted or not to alkaline pre-treatment with green liquor, has been evaluated. The hydrolysis was carried out with a enzymatic cocktail containing aggressive cellulases, high level of ?-glucosidases and hemicellulase at 6% (g enzyme/g solid),...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Eucalyptus; Eucalipto; Espécie exótica; Second generation ethanol; Pre-treatment; Enzymatic hydrolysis; Etanol de segunda geração; Madeira; Pré tratamento; Hidrólise enzimática.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1029093
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Fed batch enzymatic saccharification of food waste improves the sugar concentration in the hydrolysates and eventually the ethanol fermentation by Saccharomyces cerevisiae H058 BABT
Yan,Shoubao; Yao,Jianming; Yao,Liming; Zhi,Zhijun; Chen,Xiangsong; Wu,Jingyong.
The enzymatic hydrolysis of food waste by commercially available enzymes and the subsequent ethanol fermentation of the hydrolysates by Saccharomyces cerecisiae H058 were studied in this work. The optimum batch enzymatic conditions were found to be saccharification pH of 4.5, temperature of 55!, glucoamylase concentration of 120 u/g, α-amylase concentration of 10 u/g, solid-liquid ratio of 1: 0.75 (w/w). Fed batch hydrolysis process was started with a solid-liquid ratio of 1: 1 (w/w), with solid food waste added at time lapse of 2 h to get a final solid-liquid ratio of 1: 0.5 (w/w). After 4 h of reaction, the reducing sugar concentration reached 194.43 g/L with a enzymatic digestibility of 93.12%. Further fermentation of the batch and fed batch enzymatic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Food waste; Enzymatic hydrolysis; Hydrolysates; Fermentation; Ethanol production.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000200002
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Hidrólise de proteínas tóxicas de sementes de mamona utilizando látex vegetal como fonte proteolítica. Repositório Alice
EGITO, A. S. do; POMPEU, R. C. F. F.; ANDRADE, F. P. de; FEITOSA, T. S.; RAMOS, M. V.; SALLES, H. O..
2014
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Destoxificação; Variedade BRS-Energia; Mamona; Ricinus communis; Biocombustível; Substância tóxica; Protease; Digestibilidade; Extrato vegetal; Enzima; Hidrólise; Latex; Semente; Torta; Detoxification; Toxic substances; Biorremediação; Ricin; Calotropis procera; Biofuels; Digestibility; Castor beans; Enzymatic hydrolysis.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/993310
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Hydrolysis of various thai agricultural biomasses using the crude enzyme from Aspergillus aculeatus iizuka FR60 isolated from soil BJM
Boonmee,Atcha.
In this study, forty-two fungi from soil were isolated and tested for their carboxymethyl cellulase (CMCase) and xylanase activities. From all isolates, the fungal isolate FR60, which was identified as Aspergillus aculeatus Iizuka, showed high activities in both CMCase and xylanase with 517 mU/mg protein and 550 mU/mg protein, respectively. The crude enzyme from A. aculeatus Iizuka FR60 could hydrolyze several agricultural residues such as corncob, and sweet sorghum leaf and stalk at comparable rates with respect to the tested commercial enzymes and with a maximum rate in rice hull hydrolysis (29 μg sugar g-1 dry weight substrate mg-1 enzyme hr-1). The highest amount of glucose was obtained from corncob by using the crude enzyme from A. aculeatus Iizuka...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural wastes; Aspergillus aculeatus Iizuka; Enzymatic hydrolysis; Mean specific rate; Reducing sugars.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200005
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In vitro protein digestibility of enzymatically pre-treated bean (Phaseolus vulgaris L.) flour using commercial protease and Bacillus sp. protease Ciênc. Tecnol. Aliment.
Dias,Disney Ribeiro; Abreu,Celeste Maria Patto de; Silvestre,Marialice Pinto Coelho; Schwan,Rosane Freitas.
The common bean (Phaseolus vulgaris L.) is a staple food in the Brazilian diet and represents the major source of dietary protein and other micronutrients and minerals. Despite the considerable protein concentration in beans, the food is considered of low biological value when compared to animal proteins and other plant protein sources. To improve the availability of protein in beans, enzymatic treatments were performed in four cultivars (ON, OPNS, TAL and VC3). The approach was a completely randomized design with four replicates. We used a 4 × 3 factorial arrangement (four cultivars and three treatments: treatment 1-addition of commercial protease (Trypsin 250, Difco), treatment 2-addition of protease from Bacillus sp., and treatment 3:-control without...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bean flour; Enzymatic hydrolysis; Alkaline protease.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612010000100014
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Influence of hydrolysis time on protein recovery and amino acid composition of hydrolysates from Sepia officinalis viscera ArchiMer
Soufi-kechaou, Emna; Jaouen, Pascal; Ben Amar, Raja; Berge, Jean-pascal.
Enzymatic hydrolysis of cuttlefish viscera by Protamex, Pepsin, Delvolase and Multifect Neutral was investigated in a batch reactor during 6 hours with an hourly sampling. The influence of the enzyme used and the hydrolysis conditions (operating pH, temperature) was studied with regards to the extent of proteolytic degradation and to molecular weight distribution of the peptides. After 360 min of hydrolysis, cuttlefish viscera treated with Pepsin yielded significantly (p < 0.05) higher protein recoveries compared to the substrate autolysed or treated with other external proteases. However, the amino acid composition showed that this was Protamex hydrolysis which gave the highest percentage of essential amino acids. At least, according to the FPLC...
Tipo: Text Palavras-chave: Enzymatic hydrolysis; Cuttlefish Protein Hydrolysates (CPH); Cuttlefish By-Products (CBP); Essential Amino Acids (EAA); Protein recovery.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00114/22508/20191.pdf
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Molecular cloning and characterization of an a-amylase cDNA highly expressed in major feeding stages of the coffee berry borer, Hypothenemus hampei. Repositório Alice
BEZERRA, C. A.; MACEDO, L. L. P.; AMORIM, T. M. L.; SANTOS, V. O.; FRAGOSO, R. da R.; LUCENA, W. A.; MENEGUIM, A. M.; VALENCIA-JIMENEZ, A.; ENGLER, G.; SILVA, M. C. M. da; SA, M. F. G. de; FREIRE, E. V. S. A..
Abstract: a-Amylases are common enzymes responsible for hydrolyzing starch. Insect-pests, whose larvae develop in seeds, rely obligatorily on a-amylase activity to digest starch, as their major food source. Considering the relevance of insect a-amylases and the natural a-amylase inhibitors present in seeds to protect from insect damage, we report here the molecular cloning and nucleotide sequence of the full-length AmyHha cDNA of the coffee berry borer, Hypothenemus hampei, a major insect-pest of coffee crops. The AmyHha sequence has 1879 bp, containing a 1458 bp open reading frame, which encodes a predicted protein with 485 amino acid residues, with a predicted molecular mass of 51.2 kDa. The deduced protein showed 55?79% identity to other insect...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Expressão gênica; Curculionideo; Praga de planta; Amido; Hidrolise; Curculionidae; Gene expression; Insect pests; Starch; Enzymatic hydrolysis.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1003023
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Molecular cloning and characterization of an alfa-amylase cDNA highly expressed in major feeding stages of the coffee berry borer, Hypothenemus hampei. Repositório Alice
BEZERRA, C. A.; MACEDO, L. L. P.; AMORIM, T. M. L.; SANTOS, V. O.; FRAGOSO, R. da R.; LUCENA, W. A.; MENEGUIM, A. M.; VALENCIA-JIMENEZ, A.; ENGLER, G.; SILVA, M. C. M.; ALBUQUERQUE, E. V. S.; GROSSI-DE-SA, M. F..
Abstract: a-Amylases are common enzymes responsible for hydrolyzing starch. Insect-pests, whose larvae develop in seeds, rely obligatorily on a-amylase activity to digest starch, as their major food source. Considering the relevance of insect a-amylases and the natural a-amylase inhibitors present in seeds to protect from insect damage, we report here the molecular cloning and nucleotide sequence of the full-length AmyHha cDNA of the coffee berry borer, Hypothenemus hampei, a major insect-pest of coffee crops. The AmyHha sequence has 1879 bp, containing a 1458 bp open reading frame, which encodes a predicted protein with 485 amino acid residues, with a predicted molecular mass of 51.2 kDa. The deduced protein showed 55?79% identity to other insect...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Expressão gênica; Curculionideo; Praga de planta; Amido; Hidrolise; Curculionidae; Gene expression; Insect pests; Starch; Enzymatic hydrolysis.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1006141
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Optimization of the production process of enzymatic activity of Lentinula edodes (Berk.) Pegler in holocelulases. Repositório Alice
CHICATTO, J. A.; CASTAMANN, V. A.; HELM, C. V.; TAVARES, L. B. B..
Issues such as fossil fuels and oil supplies have stimulated the search for renewable alternatives such as biofuels. Agricultural crop residues represent an abundant renewable resource for the future of bioethanol. For it to be a viable alternative, the second-generation ethanol which ought to provide a net energy gain, environmental benefits, should be economically viable, and also be produced in large quantities without reducing food supplies. The current difficulty of lignocellulosic biofuel production is the hydrolysis of biomass into sugar. This is a work in which the white-rot Lentinula edodes fungus secretes substantial amounts of hydrolytic enzymes and is useful for degradation of lignocellulosic biomass which have not been described yet. The...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Bioetanol; Celulase; Xilanase; Hidrólise enzimática; Basidiomiceto; Bioethanol; Cellulase; Xylanase; Enzymatic hydrolysis; Basidiomycetes.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/987490
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Potential of giant reed (Arundo donax L.) for second generation ethanol production Electron. J. Biotechnol.
Lemons e Silva,Claudia Fernanda; Artigas Schirmer,Manoel; Nobuyuki Maeda,Roberto; Araújo Barcelos,Carolina; Pereira,Nei.
Background The production of second generation ethanol from lignocellulosic biomasses that have not had their potential fully explored as feedstock is of great importance. Arundo donax is one these biomasses. It is a promising grassy plant to be used as a renewable resource for the production of fuels and chemicals, because of its fast growth rate, ability to grow in different soil types and climatic conditions. The present study evaluated its use as feedstock for the production of second generation ethanol. Results Initially its chemical characterization was carried out, and a protocol for fractioning the biomass through diluted acid pretreatment followed by alkaline pretreatment was developed, providing a solid fraction which was undergone to enzymatic...
Tipo: Journal article Palavras-chave: Acid and alkaline pretreatments; Alcohol fermentation; Cellulase; Enzymatic hydrolysis; Lignocellulose.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000100003
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