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| Registros recuperados: 14 | |
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| Silva,Isley Cristiellem Bicalho da; Basílio,Josiana Jussara Nazaré; Fernandes,Luiz Arnaldo; Colen,Fernando; Sampaio,Regynaldo Arruda; Frazão,Leidivan Almeida. |
| ABSTRACT: The production of biochar from organic residues promises to be an interesting strategy for the management of organic waste. To assess the effect of biochar on soil properties and the production and nutrition of common bean (Phaseolus vulgaris L.), three simultaneous experiments were conducted in a greenhouse with different biochar from organic residues (rice husk, sawdust, and sorghum silage) used as filtration material for swine biofertilizer. In each experiment the treatments consisted of five different biochar concentrations (0, 25, 50, 75 and 100 L m−3), arranged in a completely randomized design, with four repetitions. In the experiments, the use of biochar increased soil pH, cation exchange capacity, nutrient availability in the soil, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris L.; Agricultural residues; Biochar; Soil fertility. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000500378 |
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| HOMDOUNG, NIGRAN. |
| Torrefaction and densification are suitable techniques for upgrading solid biomass materials. They can improve the energy properties of solid fuels. The objective of this research was to evaluate changes in physico-chemical properties of agricultural residues (corn-cobs and rice husks) during torrefaction. Physical properties of the torrefied biomass pellets were analysed. The results showed that increasing the torrefaction temperature and time resulted in reduced moisture and volatile matter content of corn-cobs and rice husks. At the same time, fixed carbon, ash content and heating values were increased. The heating values of both torrefied fuels were in the range of 14.9–16.9 MJ/kg, increased by about 16 to 22% from the raw biomass. The optimum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural residues; Torrefaction; Densification; Torrefied biomass; Solid fuels. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5741 |
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| Regina,Magali; Broetto,Fernando; Giovannozzi-Sermanni,Giovanni; Marabotini,Rosita; Peranni,Claudio. |
| This work aimed to study the stationary and periodically mixed culture of L. edodes to the production of lignocellulolitic enzymes activity. LE 95/17, LE 96/22 and Leax strains were incubated in 25 g of eucalyptus sawdust substrate in Erlenmeyer flasks in stationary culture at 25º C and in a bioreactor with four complete rotations daily at 25º C and 3% CO2. The samples were collected at 8, 11, 14, 17 and 20 days after the incubation. Oxidative and hydrolytic enzymes analyses were performed. Lignin peroxidase enzyme was not found in the lignolytic system for LE 95/17, LE 96/22 and Leax strains in the different incubation methods. The use of bioreactor could be a practicable system to induce the laccase activity for L22 and Leax and MnP activity for L17 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Shiitake; Enzymes; Agricultural residues. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000200001 |
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| Bajaj,Bijender Kumar; Singh,Satbir; Khullar,Mowkshi; Singh,Kaurab; Bhardwaj,Shikha. |
| The aim of this work was to study the production of fibrinolytic protease by Bacillus subtilis I-2 on agricultural residues. Molasses substantially enhanced (63%) protease production (652.32 U/mL) than control (398.64 U/mL). Soybean meal supported maximum protease production (797.28 U/mL), followed by malt extract (770.1 U/mL), cotton cake (761.04 U/mL), gelatin (742.92 U/mL) and beef extract (724.8 U/mL). Based on the Plackett-Burman designed experiments, incubation time, soybean meal, mustard cake and molasses were identified as the significant fermentation parameters. Ammonium sulfate precipitation and DEAE sephadex chromatography resulted 4.8-fold purification of protease. Zymography showed the presence of three iso-forms in the partially purified... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fibrinolytic Protease; Production; Agricultural residues; Bacillus subtilis I-2. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000500653 |
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| Souza, Patrícia Nirlane da Costa; Maia, Natália da Costa; Guimarães, Luís Henrique Souza; Resende, Mário Lúcio Vilela de; Cardoso, Patrícia Gomes. |
| The production of tannase by Aspergillus sp. GM4 under solid-state fermentation (SSF) was investigated using different vegetables leaves such as mango, jamun, coffee and agricultural residues such as coffee husks, rice husks and wheat bran. Among substrates used jamun leaves yielded high tannase production. The Plackett-Burman design was conducted to evaluate the effects of 12 independent variables on the production of tannase under SSF using jamun leaves as substrate. Among these variables, incubation time, potassium nitrate and tannic acid had significant effects on enzyme production. The best incubation time was studied and others variables were optimized using the Central Composite Design. The best conditions for tannase production were: incubation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Surface response methodology; Enzyme; Jamun; Agricultural residues. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/22731 |
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| Silva,Roberto da; Lago,Ellen S.; Merheb,Carolina W.; Macchione,Mariana M.; Park,Yong Kun; Gomes,Eleni. |
| The use of waste as raw material is important for government economy and natural balance. The purpose of this work was to study the production of CMCase and xylanase by a Brazilian strain of Thermoascus aurantiacus in solid state fermentation (SSF) using different agricultural residues (wheat bran, sugarcane bagasse, orange bagasse, corncob, green grass, dried grass, sawdust and corn straw) as substrates without enrichment of the medium and characterize the crude enzymes.The study of the extracellular cellulolytic and hemicellulolytic enzymes showed that T. arantiacus is more xylanolytic than cellulolytic. The highest levels of enzymes were produced in corncob, grasses and corn straw. All the enzymes were stable at room temperature by 24 h over a broad pH... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermoascus aurantiacus; Xylanase; CMCase; Solid state fermentation; Agricultural residues. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000300006 |
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| Gaitán-Hernández,Rigoberto; Esqueda,Martín; Gutiérrez,Aldo; Beltrán-García,Miguel. |
| The chemical changes in barley-straw (BS), wheat-straw (WS) and vineyard-pruning (VP) substrates were determined during colonization of Lentinula edodes mycelia (during primordium development) in solid state fermentation. Primordia appeared 39-50 days after inoculation. VP appeared to promote early sporophore initiation. The concentration of hemicellulose in BS and VP decreased gradually from 25.5% to 15.6% and from 15.8% to 12.3%, respectively. However in WS, hemicellulose decreased from 27.2% to 9.5%. Lignin broke down continuously in BS and WS, with 31.8% and 34.4% degradation, respectively; higher than that of cellulose. During the pinning stage, the C:N ratio decreased in VP and BS, but not in WS. On all substrates the phenols decreased notably... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural residues; Vegetative growth; Chemical properties; Shiitake mushroom. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100004 |
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| KRATZ, D.; WENDLING, I.; STUEPP, C. A.; FRAGOSO, R. de O.. |
| The definition of best substrates is often difficult due to variability of results observed in different measured variables. Therefore, we defined the best substrates for Piptadenia gonoacantha seedlings production through ranking, taking into account the relative importance of each variable in seedlings quality. In this regard, 13 substrates were formulated, composed of carbonized rice husk in different grain size, coconut fiber and two commercial substrates, pine bark and vermiculite base, all of which had their physical and chemical properties evaluated. Direct seeding was held in containers of 115 cm³, remaining for 90 days in a greenhouse and 30 days in a hardening area with full sunlight. After 120 days, an assessment of height, stem diameter, shoot... |
| Tipo: Artigo de periódico |
Palavras-chave: Pau-jacaré; Forest seedlings quality; Agricultural residues; Seedling production; Silviculture. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1060029 |
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| BARBOSA, B. M.; VAZ JUNIOR, S.; COLODETTE, J. L.; AGUIAR, A. R. de; CABRAL, C. P. T.; FARIA, B. de F. H. de. |
| Corn fiber (CF) is an agroindustrial residue obtained from starch or corn syrup. Currently, there has been increasing research interest in lignocellulosic materials from these residual materials. Consequently, this paper is a novel approach that complements the structural and chemical characterizations already published in the literature for CF. In this study, isolation, chemical composition and characterization was conducted of hemicellulose by means of 1H NMR and FTIR-ATR and Klason lignin by means of acid soluble lignin (ASL) and acid insoluble lignin (AIL) determination using UV spectrophotometry and Py?GC‒MS. Hemicellulose was obtained after aqueous extraction, lipid removal, delignification and alkaline extraction. The isolated... |
| Tipo: Artigo de periódico |
Palavras-chave: Lignocellulosic biomass; Agricultural residues; Bioproducts; Green chemistry. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1145474 |
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| Colla,Luciane Maria; Primaz,Andreiza Lazzarotto; Benedetti,Silvia; Loss,Raquel Aparecida; Lima,Marieli de; Reinehr,Christian Oliveira; Bertolin,Telma Elita; Costa,Jorge Alberto Vieira. |
| Abstract A Plackett–Burman Factorial Design of 16 experiments was conducted to assess the influence of nine factors on the production of lipases by filamentous fungi. The factors investigated were bran type (used as the main carbon source), nitrogen source, nitrogen source concentration, inducer, inducer concentration, fungal strain (Aspergillus niger or Aspergillus flavus were selected as good lipase producers via submerged fermentation), pH and agitation. The concentration of the yeast extract and soybean oil and the pH had a significant effect (p < 0.05) on lipase production and were consecutively studied through a Full Factorial Design 23, with the concentration of yeast extract and pH being significant (p < 0.05). These variables were optimized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural residues; Lipase; Optimization; Submerged bioprocess. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000200461 |
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| Scatolino,Mário Vanoli; Silva,Danillo Wisky; Mendes,Rafael Farinassi; Mendes,Lourival Marin. |
| Agricultural residues are materials generated in large quantities in Brazil and can accumulate to such extent as to cause environmental problems. Among agricultural residues, maize cob is one worthy of notice, and an alternative use for maize cob would be to produce particleboard panels in association with wood particles. This study aimed to evaluate the feasibility of using maize cob for production of particleboard panels. The following maize cob percentages were used: 0%, 25%, 50%, 75% and 100%, in association with particles of Pinus oocarpa wood. Panels were made with 8% of urea formaldehyde and 1% of paraffin (based on dry weight of particles). For compressing the panels, a pressure of 3.92 MPa was applied at a temperature of 160º C, for 8 minutes.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental problems; Reuse; Physicomechanical properties; Agricultural residues. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000400006 |
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| Registros recuperados: 14 | |
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