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Registros recuperados: 15
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AXENIC CULTIVATION OF Pleurotus ostreatus var. Florida IN SUPPLEMENTED SUGARCANE BAGASSE BRIQUETTES REA
Magalhães,Anderson C.; Moreira,Bruno R. de A.; Zied,Diego C..
ABSTRACT Articles on the applicability of briquetting to the production of mushrooms are rare. Therefore, this research provides the scientific community and, mainly, producers, unpublished technical information regarding the productive yield of oyster mushroom cultivated in sugarcane bagasse briquettes supplemented with bioproducts of cereals. In 30 days of axenic cultivation, 6 tons-force briquettes with 80% humidity resulted in higher productivity (30.4%), and generated the lowest physical volume of exhausted compound (44.8%), thus, overcoming the technical performance of the other briquetting matrices tested, and even of methods traditionally used for the preparation of substrate for P. ostreatus cultivation on a commercial scale. The conclusion is,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Briquetting; Bioconversion; Edible mushrooms; Productivity.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000600835
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Bioconversion of biomass: a case study of ligno-cellulosics bioconversions in solid state fermentation BABT
Pandey,Ashok; Soccol,Carlos R..
Lignocellulosic residues obtained from crops cultivation form useful sources to be used as substrate for bioconversion processes. Sugarcane bagasse, which is a complex substrate obtained from the processing of sugar cane, is an important biomass among such sources. Due to its abundant availability, it can serve as an ideal substrate for microbial processes for the production of value added products. This paper reviews recent developments on biological processes developed on production of various products in solid state fermentation using sugarcane bagasse as the substrate and describes production of protein enriched feed, enzymes, amino acid, organic acids and compounds of pharmaceutical importance, etc. through microbial means.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ligno-cellulosics; Sugarcane bagasse; Bioconversion; Solid state fermentation.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000400001
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Bioconversion of ginsenoside Rb1 into compound K by Leuconostoc citreum LH1 isolated from kimchi BJM
Quan,Lin-Hu; Piao,Jin-Ying; Min,Jin-Woo; Yang,Dong-Uk; Lee,Hee Nyeong; Yang,Deok Chun.
About 40 different types of ginsenoside (ginseng saponin), a major pharmacological component of ginseng, have been identified along with their physiological activities. Among these, compound K has been reported to prevent the development of and the metastasis of cancer by blocking the formation of tumors and suppressing the invasion of cancerous cells. In this study, ginsenoside Rb1 was converted into compound K via interaction with the enzyme secreted by β-glucosidase active bacteria, Leuconostoc citreum LH1, extracted from kimchi. The optimum time for the conversion of Rb1 to compound K was about 72 hrs at a constant pH of 6.0 and an optimum temperature of about 30ºC. Under optimal conditions, ginsenoside Rb1 was decomposed and converted into compound K...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioconversion; Compound K; Ginsenoside Rb1; Leuconostoc citreum LH1.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000300049
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Bioconversion of petroleum hydrocarbons in soil using apple filter cake BJM
Medaura,M. Cecilia; Ércoli,Eduardo C..
The aim of this study was to investigate the feasibility of using apple filter cake, a fruit-processing waste to enhance the bioremediation of petroleum contaminated soil. A rotating barrel system was used to study the bioconversion of the xenobiotic compound by natural occurring microbial population. The soil had been accidentally polluted with a total petroleum hydrocarbon concentration of 41,000 ppm. Although this global value was maintained during the process, microbial intervention was evidenced through transformation of the petroleum fractions. Thus, fractions that represent a risk for the environment (GRO, Gasoline Range Organics i.e., C6 to C10-12; DRO, Diesel Range Organics i.e., C8-12 to C24-26 and RRO, Residual Range Organics i.e., C25 to C35)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Apple filter cake; Bioconversion; Bioremediation; Petroleum contaminated soil.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000300004
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Bioconversion of R-(+)-limonene to perillic acid by the yeast Yarrowia lipolytica BJM
Ferrara,Maria Antonieta; Almeida,Débora S.; Siani,Antonio C.; Lucchetti,Leonardo; Lacerda,Paulo S.B.; Freitas,André; Tappin,Marcelo R.R.; Bon,Elba P.S..
Perillyl derivatives are increasingly important due to their flavouring and antimicrobial properties as well as their potential as anticancer agents. These terpenoid species, which are present in limited amounts in plants, may be obtained via bioconversion of selected monoterpene hydrocarbons. In this study, seventeen yeast strains were screened for their ability to oxidize the exocyclic methyl group in the p-menthene moiety of limonene into perillic acid. Of the yeast tested, the highest efficiency was observed for Yarrowia lipolytica ATCC 18942. The conversion of R (+)-limonene by Y. lipolytica was evaluated by varying the pH (3 to 8) and the temperature (25 to 30 ºC) in a reaction medium containing 0.5% v/v limonene and 10 gµL of stationary phase cells...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Yarrowia lipolytica; Bioconversion; Limonene; Perillic acid.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000400008
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Comparison of the susceptibility of two hardwood species, Mimosa scabrella Benth and Eucalyptus viminalis labill, to steam explosion and enzymatic hydrolysis BABT
Ramos,L. P.; Carpes,S. T.; Silva,F. T.; Ganter,J. L. M..
Steam explosion of two hardwood species was carried out with and without addition of sulfuric acid (H2SO4 0.5%, p/v) as a pretreatment catalyst. In general, wood chips of Eucalyptus viminalis Labill were shown to be more amenable to pretreatment than chips derived from bolds of Mimosa scabrella Benth (bracatinga). This was apparent from all pretreatment parameters tested including the overall recovery yields of pretreated fractions, carbohydrates (pentoses and hexoses) recovered as water-solubles, yield of dehydration by-products and lignin susceptibility to acid hydrolysis. There was no evidence for complete deacetylation of both wood species during pretreatment and lignin appeared to undergo extensive acid hydrolysis at higher pretreatment severities....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Eucalyptus viminalis; Mimosa scabrella; Steam explosion; Pretreatment; Bioconversion.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000200009
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Consolidated briefing of biochemical ethanol production from lignocellulosic biomass Electron. J. Biotechnol.
Spyridon,Achinas; Willem Euverink,Gerrit Jan.
Bioethanol production is one pathway for crude oil reduction and environmental compliance. Bioethanol can be used as fuel with significant characteristics like high octane number, low cetane number and high heat of vaporization. Its main drawbacks are the corrosiveness, low flame luminosity, lower vapor pressure, miscibility with water, and toxicity to ecosystems. One crucial problem with bioethanol fuel is the availability of raw materials. The supply of feedstocks for bioethanol production can vary season to season and depends on geographic locations. Lignocellulosic biomass, such as forest-based woody materials, agricultural residues and municipal waste, is prominent feedstock for bioethanol cause of its high availability and low cost, even though the...
Tipo: Journal article Palavras-chave: Bioconversion; Bioethanol; Fermentation; Hydrolysis; Renewable fuels.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000500009
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Enzyme-assisted extraction (EAE) for the production of antiviral and antioxidant extracts from the green seaweed Ulva armoricana (Ulvales, Ulvophyceae) ArchiMer
Hardouin, Kevin; Bedoux, Gilles; Burlot, Anne-sophie; Donnay-moreno, Claire; Berge, Jean-pascal; Nyvall-collen, Pi; Bourgougnon, Nathalie.
In order to develop innovative methods for the production of bioactive extracts with potential health benefits, enzyme-assisted extraction has been applied for the bioconversion of Ulva armoricana (Ulvales, Ulvophyceae). The extraction yields, chemical composition, the antioxidant and antiviral activities were determined to assess the efficiency of six commercial enzymatic preparations. Endo-protease treatments significantly increased the extraction yields compared to the control. The organic matter, neutral sugar and protein contents were increased in all extracts compared to an extraction with water, up to 2.0-fold, 2.7-fold and 1.75-fold, respectively. The samples prepared by a multiple-mix of glycosyl-hydrolases and an exo-β-1,3(4)-glucanase revealed...
Tipo: Text Palavras-chave: Ulvan; Antiviral activity; Carbohydrate; Endo-protease; Bioconversion; Biorefinery.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00321/43187/45542.pdf
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Expression in Escherichia coli and characterization of beta-xylosidases GH-39 and GH-43 from Bacillus halodurans C-125 Inra
Smaali, I.; Remond-Zilliox, C.; O Donohue, M..
To develop xylosidases as tools for the hydrolysis of wheat bran arabinoxylans, two beta-xylosidases from Bacillus halodurans C-125 have been cloned and expressed in Escherichia coli. The recombinant (His)6-tagged enzymes, designated as XylBH39 and XylBH43, were efficiently purified using Ni2+-affinity chromatography. Determination of native molecular masses indicated that XylBH43 is dimeric in solution, whereas a similar analysis of XylBH39 did not allow differentiation between the dimeric and trimeric states. Both enzymes had similar pH and temperature optima (pH 7.5 and 55°C for XylBH39 and pH 8 and 60°C for XylBH43) and were relatively stable over the pH range of 3.5–8.5. In contrast, XylBH39 was more thermostable. At 60°C, XylBH39 and XylBH43...
Tipo: Journal Article Palavras-chave: Xylosidase; Heterologous expression; Hemicelluloses; Bioconversion; Bacillus halodurans C-125.
Ano: 2006 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20075d4d976a&uri=/notices/prodinra1/2010/09/
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Growth and antibacterial activity of Lentinula edodes in liquid media supplemented with agricultural wastes Electron. J. Biotechnol.
Hiroko Hassegawa,Regina; Megumi Kasuya,Maria Catarina; Dantas Vanetti,Maria Cristina.
Antibacterial activity of Lentinula edodes against Bacillus subtilis was evaluated in cell-free filtrates obtained after growth in 14 different culture media. The highest B. subtilis growth inhibition was promoted by filtrates of growth media supplemented with rice bran, vermiculite or molasses. L. edodes dry mycelial biomass in liquid culture with 0.5% added rice bran was 3.2 mg/ml, after growth for 30 days at 25ºC without shaking, and 4.3 mg/ml under orbital shaking (150 rpm). However, antibacterial activity, detected between 20 and 24 days of incubation of stationary cultures, was absent in filtrates of aerated cultures. Temperatures of 20-25ºC enhanced both growth and antibacterial activity. Optimum pH for L. edodes mycelial growth...
Tipo: Journal article Palavras-chave: Bacterial inhibition; Bioconversion; Mycelial growth; Mushroom; Shiitake.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582005000200011
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Isolation and characterization of bacterial strains with a hydrolytic profile with potential use in bioconversion of agroindustial by-products and waste Ciênc. Tecnol. Aliment.
Mazzucotelli,Cintia Anabela; Ponce,Alejandra Graciela; Kotlar,Catalina Elena; Moreira,María del Rosario.
There is a trend towards the use of novel technologies nowadays, mainly focused on biological processes, for recycling and the efficient utilization of organic residues that can be metabolized by different microorganisms as a source of energy. In the present study the isolation of bacterial strains from six different agro-industrial by-products and waste was performed with the objective of evaluating their hydrolytic capacities and suitability for use in bioconversion of specific substrates. The 34 isolated strains were screened in specific culture media for the production of various hydrolytic enzymes (lipase, protease, cellulase, and amylase). It was found that 28 strains exhibited proteolytic activity, 18 had lipolytic activity, 13 had caseinolytic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydrolytic profile; Waste management; Bioconversion.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612013000200013
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Microbial production of biovanillin BJM
Converti,A.; Aliakbarian,B.; Domínguez,J.M.; Vázquez,G. Bustos; Perego,P..
This review aims at providing an overview on the microbial production of vanillin, a new alternative method for the production of this important flavor of the food industry, which has the potential to become economically competitive in the next future. After a brief description of the applications of vanillin in different industrial sectors and of its physicochemical properties, we described the traditional ways of providing vanillin, specifically extraction and chemical synthesis (mainly oxidation) and compared them with the new biotechnological options, i.e., biotransformations of caffeic acid, veratraldehyde and mainly ferulic acid. In the second part of the review, emphasis has been addressed to the factors most influencing the bioproduction of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vanillin; Bioconversion; Review; Ferulic acid; Escherichia col.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000300001
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Production of ethanol from mesquite [Prosopis juliflora (SW) D.C.] pods mash by Zymomonas mobilis in submerged fermentation Scientia Agricola
Silva,Celiane Gomes Maia da; Andrade,Samara Alvachian Cardoso; Schuler,Alexandre Ricardo Pereira; Souza,Evandro Leite de; Stamford,Tânia Lúcia Montenegro.
Mesquite [Prosopis juliflora (SW) D.C.], a perennial tropical plant commonly found in Brazilian semi-arid region, is a viable raw material for fermentative processes because of its low cost and production of pods with high content of hydrolysable sugars which generate many compounds, including ethanol. This study aimed to evaluate the use of mesquite pods as substrate for ethanol production by Z. mobilis UFPEDA205 in a submerged fermentation. The fermentation was assessed for rate of substrate yield to ethanol, rate of ethanol production and efficiency of fermentation. The very close theoretical (170 g L-1) and experimental (165 g L-1) maximum ethanol yields were achieved at 36 h of fermentation. The highest counts of Z. mobilis UFEPEDA-205 (both close to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Renewable sources; Bioconversion; Fermentative parameters.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000100019
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Screening of filamentous fungi for production of xylitol from D-xylose BJM
Sampaio,Fábio Coelho; Silveira,Wendel Batista da; Chaves-Alves,Virgínia Maria; Passos,Flávia Maria Lopes; Coelho,Jorge Luiz Cavalcante.
Eleven filamentous fungi were screened for xylitol production in batch cultures. Production was generally low under the growth conditions used in this study. Penicillium crustosum presented the highest production, 0.52 g L-1 from 11.50 g L-1 of D-xylose, representing consumption of 76% of the original D-xylose.
Tipo: Info:eu-repo/semantics/other Palavras-chave: Xylose; Bioconversion; Xylitol; Filamentous fungi.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000400007
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STUDYING DEVELOPMENT OF HERMETIA ILLUCENS FLY LARVAE CULTIVATED ON HIGH CELLULOSE PLANT SUBSTRATES CIGR Journal
Yuirna, Olga.
Hermetia illucens L. larvae with experimentally confirmed morphological and genetic characteristics were grown on plant substrates with 4.3% to 19.0% cellulose content: crushed corn kernels, wheat bran, beet pulp, and distillery stillage. It has been determined that the larvae are able to grow rapidly on the plant substrates during 10-14 days until the prepupal stage if optimal conditions are maintained, i.e.: air temperature (28 °C) and substrate humidity about 60%. The highest substrate conversion was demonstrated for corn kernels and was equal to 77% in 14 days. A biomass yield of 181 g from 1 kg of substrate was obtained. With wheat bran the conversion was 64%, process time: 10 days. Distillery stillage and beet pulp contained high amounts of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fly Hermetia illucens L.; Larvae of Black soldier fly; Biomass; Bioconversion; Plant substrates; Amount of cellulose; Feed of farm animals.
Ano: 2018 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4567
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