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| PIEROZZI JR. I.; CAPUTI, E.; FILARDI, A. L.. |
| A Embrapa Monitoramento por Satélite, desde 1991, adaptou-se a esse novo cenário tecnológico e vem aprimorando, sempre que possível, seus recursos físicos e humanos a essa realidade. Justamente por estar acompanhando e aplicando essa tecnologia desde seu início, a Unidade possui um histórico de acontecimentos e desenvolvimento de infraestrutura, linguagens computacionais e metodologias que refletem exatamente a rapidez com a qual a Internet vem se desenvolvendo e a amplitude de aplicações que vem oferecendo. Este histórico é apresentado no trabalho, com o intuito de resgate e registro da experiência da equipe do Centro, nesta área específica do conhecimento humano, avaliando as transformações e adaptações de tecnologias e linguagens e sua importância como... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Redes de comunicação; Difusão de informação.; Internet.. |
| Ano: 2000 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/16875 |
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| Cavlovic, Therese A.; Baker, Kenneth H.; Berrens, Robert P.; Gawande, Kishore. |
| An understanding of the empirical relationship between income and environmental quality is evolving through recent studies investigating the Environmental Kuznets Curve (EKC). The EKC represents an inverted-U relationship between income and environmental degradation. However, studies may employ different methods, evaluate different environmental indicators, and use different data, resulting in a broad spectrum of findings and leading to sometimes conflicting interpretations. The purpose of this paper is to synthesize the results of existing EKC findings by conducting a statistical meta-analysis, and to predict new income turning points (ITP). Results indicate how both methodological choices and pollutant types affect ITPs. |
| Tipo: Journal Article |
Palavras-chave: Environmental Economics and Policy; Q20. |
| Ano: 2000 |
URL: http://purl.umn.edu/31330 |
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| Viljoen, Machiel F.; Dudley, N.J.; Gakpo, E.F.Y.. |
| Information on the value of water in use is a prerequisite for the efficient allocation, utilization, trading and transfer thereof. These issues are becoming very important for South Africa. Linear programming (LP) and stochastic dynamic programming (SDP) are two techniques that can be applied to value water. Based on a simulated irrigation farming situation downstream of the Vanderkloof Dam wherein farmers hold a capacity share (CS) this paper draws a comparison between the marginal value products (MVP’s) obtained from applying LP and SDP simultaneously. Linear programming is used to optimize water use on the farm during the immediate season while SDP is used to optimize the use of water in storage in the farmers capacity share (CS) in the Vanderkloof Dam... |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2000 |
URL: http://purl.umn.edu/54209 |
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| Pereira,V.A.; Auler Jr.,J.O.; Carmona,M.J.; Mateus,F.H.; Lanchote,V.L.; Breimer,D.D.; Santos,S.R.C.J.. |
| We describe a new simple, selective and sensitive micromethod based on HPLC and fluorescence detection to measure debrisoquine (D) and 4-hydroxydebrisoquine (4-OHD) in urine for the investigation of xenobiotic metabolism by debrisoquine hydroxylase (CYP2D6). Four hundred µl of urine was required for the analysis of D and 4-OHD. Peaks were eluted at 8.3 min (4-OHD), 14.0 min (D) and 16.6 min for the internal standard, metoprolol (20 µg/ml). The 5-µm CN-reverse-phase column (Shimpack, 250 x 4.6 mm) was eluted with a mobile phase consisting of 0.25 M acetate buffer, pH 5.0, and acetonitrile (9:1, v/v) at 0.7 ml/min with detection at lexcitation = 210 nm and lemission = 290 nm. The method, validated on the basis of measurements of spiked urine, presented 3... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Debrisoquine; 4-hydroxydebrisoquine; HPLC-F; Urinary excretion kinetics; Debrisoquine test validation; CYP2D6. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000500004 |
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| Pagand, Pascal; Blancheton, Jean-paul; Casellas, Claude. |
| Fish excretions and the transformation of nitrogen by bacteria in the nitrifying biofilter are two of the main sources of dissolved inorganic nitrogen (DIN) in fish farms that use recirculating water systems. In this study, the DIN concentration in an experimental Dicentrarchus labrax aquaculture system was calculated using empirical sub-models for fish growth, ingested food and water replacement. The specific growth rate (SGR) (% day(-1)) and the daily feeding rate (DFR) (% day(-1)) both depend on the average weight, W (g), of the fish: Y = aW(b), where Y may be SGR or DFR, and a and b are empirical constants. The DIN discharge rate, Gamma(N) (% of ingested nitrogen), in the experimental aquaculture system was expressed as a function of increasing... |
| Tipo: Text |
Palavras-chave: Recirculating water system; Nitrogen production; Model; Fish farm effluent; European sea bass; Dissolved inorganic nitrogen. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/2000/publication-514.pdf |
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| Brosig, Stephan. |
| The paper describes a two stage model of Hungarian households' food demand. Demand for the food aggregate is represented by a Working-Leser type single equation model while demand for seven distinct food types is modelled in a complete demand system using the LA/AIDS functional form. Estimation is based on household budget survey data for 1996. Demand elasticities are estimated for average households as well as for specific groups defined by sociodemographic characteristics. Fruit and vegetables are found to be the food types with most elastic demand but in general, differences between elasticities for different products as well as between different sociodemographic groups are relatively small. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Food demand; Demand modelling; Hungary; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; D12; C31; C51. |
| Ano: 2000 |
URL: http://purl.umn.edu/14864 |
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| Noelke, Corinna M.; Caswell, Julie A.. |
| We develop a model of the impact of food quality management systems (QMS) on competitiveness and markets. QMS seek to control the quality of a product as determined by the array of individual attributes it possesses. To date only a few studies have attempted to better understand the effect of the introduction of quality management systems. No model has been introduced which captures the interactions within the supply chain and at the interface with consumers when these systems are introduced. Keywords: Product Quality, Quality Assurance, Supply Chain |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Product Quality; Quality Assurance; Supply Chain; Marketing. |
| Ano: 2000 |
URL: http://purl.umn.edu/21874 |
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| Waldschmidt,Ana M.; Barros,Everaldo G. de; Campos,Lucio A.O.. |
| The stingless bee species Melipona quadrifasciata includes two subspecies, Melipona quadrifasciata anthidioids and Melipona quadrifasciata quadrifasciata. The morphological difference between the two subspecies is the presence of three to five continuous yellow stripes on the terga on the 3rd to 6th segments in workers and males of M. q. quadrifasciata, and two to five interrupted bands in M. q. anthidioides. We identified a DNA marker which is present in M. q. quadrifasciata and absent in M. q. anthidioides. Only one among the M. q. quadrifasciata colonies did not present the marker. It was also absent in bees collected in northern Minas Gerais State (Brazil), despite their morphological resemblance to M. q. quadrifasciata. The marker can be used for... |
| Tipo: Info:eu-repo/semantics/other |
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| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000300019 |
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