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Registros recuperados: 12
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Analysis of some important cost factor of poultry meat production AgEcon
Szentirmay, Andras.
Cost efficiency is one of the most important influencing factors of competitiveness in poultry business because the international price competition of poultry meat products is getting tightly year by year. This study would like to open up some property of the cost structure of chicken meat production, and try to draw up some interesting analysis about the correlation of the different cost factors of poultry meat producing. The starting point of the study is the vertically integrated poultry chain where different supply chain elements working together. The analysed supply chain elements are the chicken growing (broiler growing) and the chicken slaughtering (producing fresh chicken meat products). The study analysing the cost structure of these activities...
Tipo: Journal Article Palavras-chave: Poultry industry; Cost efficiency; Cost structure; Correlation analysis; Vertical integration; Profitability; Demand and Price Analysis; Livestock Production/Industries; Production Economics.
Ano: 2007 URL: http://purl.umn.edu/51952
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Concentrations en métaux toxiques chez Crassostrea gasar (Huître de mangrove) en zone urbaine lagunaire d'Abidjan (Côte d'Ivoire) OceanDocs
Métongo, Bernard Soro.
Cet article présente les résultats relatifs à une étude des concentrations en métaux toxiques (Cd, Cu, Hg et Zn) chez Crassostrea gasar (huître de mangrove). Une étude comparative est faite entre les échantillons collectés en zone urbaine (Abidjan) et ceux des régions rurales (Assini-mafia et Assouindé). Les échantillons collectés en zone urbaine d'Abidjan ont des teneurs en métal plus élevées que ceux de la zone rurale, en raison de la pollution chimique due aux rejets urbains et industriels. Les corrélations polluants-poids des organismes et entre polluants sont assez bonnes.
Tipo: Journal Contribution Palavras-chave: Correlation analysis; Heavy metals.
Ano: 1991 URL: http://hdl.handle.net/1834/5161
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Correlation Analysis of Financial Contagion: What One Should Know Before Running a Test AgEcon
Corsetti, Giancarlo; Pericoli, Marcello; Sbracia, Massimo.
This paper builds a general test of contagion in financial markets based on bivariate correlation analysis – a test that can be interpreted as an extension of the normal correlation theorem. Contagion is defined as a structural break in the data generating process of rates of return. Using a factor model of returns as theoretical framework, we nest leading contributions in the literature as special cases of our test. We show that, while the literature on correlation analysis of contagion is successful in controlling for a potential bias induced by changes in the variance of global shocks, current tests are conditional on a specific yet arbitrary assumption about the variance of country specific shocks. Our results suggest that, for a number of pairs of...
Tipo: Working or Discussion Paper Palavras-chave: Contagion; Financial crisis; Correlation analysis; Financial Economics; F30; C10; G10; G15.
Ano: 2001 URL: http://purl.umn.edu/28420
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Lumping and correlation analyses of arthropod taxa in tropical irrigated rice fields International Rice Research Institute
Zhang, W. J.; Schoenly, K. G..
p.41-43
Palavras-chave: Arthropods; Biodiversity; Taxa; Sampling; Computer software; Correlation analysis; Irrigated soils.
Ano: 2004 URL: http://hdl.handle.net/123456789/768
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Morphogenetic responses of embryo culture of wheat related to environment culture conditions of the explant donor plant Scientia Agricola
Dodig,Dejan; Zorić,Miroslav; Mitić,Nevena; Nikolić,Radomirka; King,Stephen R.; Lalević,Blažo; Šurlan-Momirović,Gordana.
Availability of immature embryos as explants to establish wheat (Triticum aestivum L.) by tissue culture can be limited by climatic factors and the lack of high quality embryos frequently hampers experimentation. This study evaluates the effects of rainfall, various temperature-based variables and sunshine duration on tissue culture response (TCR) traits including callus formation (CF), regenerating calli (RC), and number of plants per embryo (PPE) for 96 wheat genotypes of worldwide origin. The objectives of this study were to evaluate the significance of a particular climatic factor on TCR traits and to determine the period of wheat growth during which these factors were the most effective. The genotypes were grown in an experimental field during three...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum L.; Biplot; Correlation analysis; Environment variable; Growth period.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000300007
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Optimization of Phenolics and Flavonoids Extraction Conditions and Antioxidant Activity of Roasted Yerba-Mate Leaves (Ilex paraguariensis A. St.-Hil., Aquifoliaceae) using Response Surface Methodology Anais da ABC (AABC)
BASSANI,DÉBORA C.; NUNES,DOMINGOS S.; GRANATO,DANIEL.
This study focused on maximizing the extraction of total phenolics and flavonoids as well as the antioxidant activity measured by the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay from roasted yerba mate (Ilex paraguariensis) as a function of time (5, 7.5 and 10 min) and temperature of extraction (60, 75 and 90°C). The data were subjected to Response Surface Methodology and the results showed that polynomial equations were significant, did not present lack of fit, and presented adjusted determination coefficients above 98%, proving their suitability for prediction purposes. Using the desirability function, the optimum operating conditions to obtain a higher extraction of antioxidants was found to be 10 min of extraction at 90°C, and the tea prepared under...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phenolic composition; Correlation analysis; Desirability function; Phytochemicals; Functional foods.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200923
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Pedotransfer functions to estimate retention and availability of water in soils of the state of Santa Catarina, Brazil Rev. Bras. Ciênc. Solo
Costa,André da; Albuquerque,Jackson Adriano; Almeida,Jaime Antônio de; Costa,Adriano da; Luciano,Rodrigo Vieira.
Studies on water retention and availability are scarce for subtropical or humid temperate climate regions of the southern hemisphere. The aims of this study were to evaluate the relations of the soil physical, chemical, and mineralogical properties with water retention and availability for the generation and validation of continuous point pedotransfer functions (PTFs) for soils of the State of Santa Catarina (SC) in the South of Brazil. Horizons of 44 profiles were sampled in areas under different cover crops and regions of SC, to determine: field capacity (FC, 10 kPa), permanent wilting point (PWP, 1,500 kPa), available water content (AW, by difference), saturated hydraulic conductivity, bulk density, aggregate stability, particle size distribution (seven...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Field capacity; Permanent wilting point; Plant available water; Correlation analysis; Path analysis.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400007
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Perceptions of Rural Air Quality: What Will the Neighbors Think? AgEcon
Lohr, Luanne.
Individuals exposed to odors from livestock facilities do not report annoyance uniformly. The reaction to a detectable odor depends on perceptions of the odor and its source which are mediated by odor attributes and personal factors. Correlations among these factors were tested in a rural context using date from a pilot study of seventeen households neighboring two swine operations in Michigan. Annoyance was measured as the impact of the neighboring facility on enjoyment of property. Characterization of odor as a problem was positively correlated with offensiveness, frequency and duration of exposure. Annoyance was negatively correlated with term of residence, current employment on a farm, and acquaintance with the facility owner. Annoyance was positively...
Tipo: Journal Article Palavras-chave: Correlation analysis; Environmental annoyance; Manure management; Odor nuisance; Agribusiness; Community/Rural/Urban Development; Environmental Economics and Policy.
Ano: 1996 URL: http://purl.umn.edu/90381
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Phosphorus nutrition reduces brown spot incidence in rainfed upland rice International Rice Research Institute
Singh, R. K.; Singh, C. V.; Shukla, V. D..
p.31-32
Palavras-chave: Application rates; Correlation analysis; Drought; Fungal diseases; Nutrient availability; Nutrient content; Phosphorus; Phosphorus fertilizers; Plant disease control; Plant nutrition; Upland rice; Cochliobolus miyabeanus.
Ano: 2005 URL: http://hdl.handle.net/123456789/1164
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Reconstruction of the 3-D Dynamics From Surface Variables in a High-Resolution Simulation of North Atlantic ArchiMer
Fresnay, S.; Ponte, Aurelien; Le Gentil, Sylvie; Le Sommer, J..
Several methods that reconstruct the three-dimensional ocean dynamics from sea level are presented and evaluated in the Gulf Stream region with a 1/60° realistic numerical simulation. The use of sea level is motivated by its better correlation with interior pressure or quasigeostrophic potential vorticity (PV) compared to sea surface temperature and sea surface salinity, and, by its observability via satellite altimetry. The simplest method of reconstruction relies on a linear estimation of pressure at depth from sea level. Another method consists in linearly estimating PV from sea level first and then performing a PV inversion. The last method considered, labeled SQG for surface quasigeostrophy, relies on a PV inversion but assumes no PV anomalies. The...
Tipo: Text Palavras-chave: Ocean dynamics; Quasi-geostrophy; Potential vorticity; Sea surface height; Correlation analysis; Spectral analysis.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00425/53632/54468.pdf
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The autecology of the edible oyster Crassostrea cucullata Born, 1778: size related vertical distribution at Mkomani, Mombasa OceanDocs
Ruwa, R.K.; Okemwa, E.; Polk, P..
The littoral oyster Crassostrea cucullata occurs between 1.05-3.35 m above chart datum with the highest density occuring between 1.85-2.75m. Its distribution is size-related as demonstrated by computation of correlation coefficients (r) and regression equations. The shell lengths (i.e. maximum linear dimension) decreases in an upshore direction. The analysis show high r-values which are significant at P<0.001. The elevation and density related effects on the shell lengths of the oysters are discussed.
Tipo: Journal Contribution Palavras-chave: Correlation analysis; CRASSOSTREA CUCULLATA; OYSTER REEFS; Oyster culture; Vertical distribution; Oyster culture; Http://aims.fao.org/aos/agrovoc/c_5483.
Ano: 1986 URL: http://hdl.handle.net/1834/1289
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Validación de tres productos de precipitación en la costa ecuatoriana OceanDocs
Cedeño, J..
Three precipitation products with global coverage have been analyzed for the ecuadorian coastal zone (below 1000 m above sea level), during the period 1964-1994, to evaluate their behavior and consistency, in addition to their response to the governing seasonal cycle. The precipitation products are : CRU (Climate Research Unit, University of East Anglia), GPCC (Global Precipitation Climatology Centre, Deutscher Wetterdients), and UDEL (University of Delaware), regridded at a regular grid of 0.25°. The reference dataset chosen (INMAHI 12k) is based on observations from 51 rain-gauges located at meteorological stations on the Ecuadorian littoral, gridded at 0.25°. The analysis is based, principally, on comparison of the products with the observed annual...
Tipo: Journal Contribution Palavras-chave: Atmospheric precipitations; Correlation analysis; Weather; Annual variations.
Ano: 2010 URL: http://hdl.handle.net/1834/4211
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