Consulta: subjectFacets:"Wheat straw"
Registros recuperados: 8
Data/hora: 02/06/2024 12:07:24

Paja de trigo como sustrato en el crecimiento de plántulas de brócoli.
Provedor de dados: 32
Autores: Díaz Serrano, Fidel René.
Con el objetivo de utilizar la paja de trigo como sustrato en el crecimiento de plántulas de brócoli se hicieron varios experimentos. En el primero se evaluaron 3 sustratos de paja de trigo con extracción de fenólicos con agua común. Las plántulas de brócoli presentaron porcentajes de inhibición entre 54.92 y 57.40 % en la parte aérea y entre 38.31 y 44.78 % en raíces con respecto al testigo. En el segundo se identificaron por cromatografía de capa fina y se cuantificaron por cromatografía líquida de alta resolución los ácidos p-cumárico y ferúlico como probables compuestos inhibidores del crecimiento. Los porcentajes de recuperación de estos ácidos fueron muy bajos con respecto a la concentración de fenólicos solubles totales (CFST) cuantificados por...
Palavras-chave: Paja de trigo; Sustratos; Fenólicos; Plántulas; Brócoli; Wheat straw; Substrates; Phenolics; Seedlings; Broccoli; Doctorado; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/497

Paja de trigo como sustrato en el crecimiento de plántulas de brócoli.
Provedor de dados: 32
Autores: Díaz Serrano, Fidel René.
Con el objetivo de utilizar la paja de trigo como sustrato en el crecimiento de plántulas de brócoli se hicieron varios experimentos. En el primero se evaluaron 3 sustratos de paja de trigo con extracción de fenólicos con agua común. Las plántulas de brócoli presentaron porcentajes de inhibición entre 54.92 y 57.40 % en la parte aérea y entre 38.31 y 44.78 % en raíces con respecto al testigo. En el segundo se identificaron por cromatografía de capa fina y se cuantificaron por cromatografía líquida de alta resolución los ácidos p-cumárico y ferúlico como probables compuestos inhibidores del crecimiento. Los porcentajes de recuperación de estos ácidos fueron muy bajos con respecto a la concentración de fenólicos solubles totales (CFST) cuantificados por...
Palavras-chave: Paja de trigo; Sustratos; Fenólicos; Plántulas; Brócoli; Wheat straw; Substrates; Phenolics; Seedlings; Broccoli; Doctorado; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/497

Characterization of cellulolytic activities of Bjerkandera adusta and Pycnoporus sanguineus on solid wheat straw medium
Provedor de dados: 69
Autores: Quiroz-Castañeda,Rosa E; Balcázar-López,Edgar; Dantán-González,Edgar; Martinez,Alfredo; Folch-Mallol,Jorge; Martínez Anaya,Claudia.
Cellulolytic properties of two white rot fungi, Bjerkandera adusta and Pycnoporus sanguineus, cultivated on wheat straw agar medium, were characterized and compared. Optimal growing parameters for maximum enzyme production for both fungi were wheat straw medium pH 5 and 28ºC. B. adusta showed, on the 6th day of culture, carboxymethylcellulose (CMC)ase activity levels 1.6 times higher than maximal P. sanguineus activity, achieved on the 8th day. B. adusta supernatants also displayed higher activity levels towards xylan (3.6-fold) compared to those of P. sanguineus. However, enzymes from P. sanguineus were more robust resisting one hour incubation at high temperatures (up to 80ºC), and exhibiting activity and stability in pH range from 2 to 8. Cellulolytic...
Tipo: Journal article
Palavras-chave: B. adusta; Cellulases; P. sanguineus; Wheat straw; Xylanases.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582009000400005

Soil water evaporation under densities of coverage with vegetable residue
Provedor de dados: 70
Autores: Gava,Ricardo; Freitas,Paulo S. L. de; Faria,Rogério T. de; Rezende,Roberto; Frizzone,José A.
This study was conducted at the Agronomic Institute of Paraná (IAPAR) in Londrina, State of Paraná (PR), Brazil (latitude 23º18'S, longitude 51º09'W and average altitude of 585 m). The local climate, according to the classification of Köeppen, is Cfa type, i.e., humid subtropical climate, with rain in all seasons and can occur dry seasons during the winter. It was determined soil evaporation (E) under different coverage densities with residue from the wheat crop. The treatments were installed in weighting lysimeters of 2.66 m² and 1.3 m deep, which allows to determine E by the mass difference with measuring precision of 0.1mm at one hour intervals. Treatments consisted of 0; 2.5; 5 and 10 t ha-1 of wheat crop residues, placed evenly over each lysimeter. In...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wheat straw; Soil coverage; Water losses.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000100010

Use of Agricultural Residue Feedstock In North Dakota Biorefineries
Provedor de dados: 31
Autores: Leistritz,   F. Larry; Hodur,   Nancy M.; Senechal,   Donald M.; Stowers,   Mark D.; McCalla,   Darold; Saffron,   Chris M.
Rising prices and uncertain supplies of petroleum, together with environmental concerns regarding fossil fuel combustion, have enhanced interest in biobased products and fuels. This study analyzes the feasibility of a multi-product biorefinery that uses wheat straw as feedstock to produce ethanol, electricity, and cellulose nanofibers. Nanofibers (nanowhiskers) would be used as reinforcements in a biobased nanocomposite material that could substitute for fiberglass in many applications. The growth of a biobased industry could have major economic development implications for the Great Plains/Midwest region.
Tipo: Journal Article
Palavras-chave: Biomass; Biomaterials; Cellulose nanofibers (CNFs); Economic development; Ethanol; Wheat straw; Agribusiness; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/90655

BIOREFINERIES USING AGRICULTURAL RESIDUE FEEDSTOCK IN THE GREAT PLAINS
Provedor de dados: 31
Autores: Leistritz,   F. Larry; Hodur,   Nancy M.; Senechal,   Donald M.; Stowers,   Mark D.; McCalla,   Darold; Saffron,   Chris M.
Rising prices and uncertain supplies of petroleum, together with environmental concerns regarding fossil fuel combustion, has enhanced interest in biobased products and fuels. The work reported here analyzes the feasibility of a multi-product biorefinery using wheat straw as feedstock that produces ethanol, electricity, and cellulose nanofibers. The nanofibers (nanowhiskers) would be used as reinforcements in a biobased nanocomposite material that could substitute for fiberglass in many applications. The analysis indicates that, at 2005 prices and costs, the biorefinery would be marginally profitable. Anticipated advances in bioprocessing technology would enhance profitability. The facility would also make a substantial contribution to the biorefinery site...
Tipo: Working or Discussion Paper
Palavras-chave: Biomass; Biomaterials; Ethanol; Wheat straw; Cellulose nanowhiskers (CNW); Economic development; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/7323

PRELIMINARY FEASIBILITY ANALYSIS FOR AN INTEGRATED BIOMATERIALS AND ETHANOL BIOREFINERY USING WHEAT STRAW FEEDSTOCK
Provedor de dados: 31
Autores: Leistritz,   F. Larry; Senechal,   Donald M.; Stowers,   Mark D.; McDonald,   William F.; Saffron,   Chris M.; Hodur,   Nancy M.
Biobased products and fuels appear to have a very bright future.  A consortium led by NDSU is currently engaged in a project that would use cellulose nanofibers derived from wheat straw to make a product that could substitute for fiberglass and plastics in many applications, including automotive parts.  The work described here analyzes the economic value of producing cellulose nanowhiskers (CNW) as a co-product in an ethanol biorefinery.  An ASPEN Plus-based process model was developed to evaluate ethanol production from wheat straw.  The base case model generated 54.418 million gallons per year (MGPY) of denatured ethanol, using approximately 900,000 tons per year of wheat straw feedstock.  The capital cost was estimated at $185 million.  Total operating...
Tipo: Working or Discussion Paper
Palavras-chave: Biomass; Biomaterials; Ethanol; Wheat straw; Cellulose nanowhiskers (CNW); Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/23500

Modeling Cellulosic Bioenergy Feedstock Supply
Provedor de dados: 31
Autores: Archer,   David W.
Tipo: Conference Paper or Presentation
Palavras-chave: Bioenergy; Feedstock; GIS; Corn stover; Wheat straw; Environmental Economics and Policy; Production Economics; Resource /Energy Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/61372