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| Registros recuperados: 88 | |
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| Santos Junior, Silvio; Dias, Marcelo Fernandes Pacheco; Mendonca, Erica Silva; Rosa, Nadir Paula Da; Silva, Tania Nunes da. |
| Muitos compostos químicos são encontrados na atmosfera terrestre atuando como “gases de efeito estufa”. Eles são importantes uma vez que impedem a reflexão total dos raios solares, Entretanto, os níveis de alguns desses gases, principalmente o gás carbônico (CO2), vem aumentando a uma taxa de 25% desde o processo de industrialização em larga escala, iniciado a 150 anos atrás. Nos últimos 20 anos o CO2 vem correspondendo a 84% dos gases provenientes das atividades humanas, e, 82% dele é resultante da queima de combustíveis fósseis. Considerando que o aumento da população e o surgimento de novas tecnologias continuam demandando energia de forma incremental, é imperativo a busca de soluções energéticas alternativas, mais sustentáveis. Neste contexto, a... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Biocombustível; Sustentabilidade; Recursos naturais; Soja; Biofuel; Sustainability; Natural Resources; Soybeans; Environmental Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/109812 |
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| Saunders, Caroline M.; Kaye-Blake, William; Cagatay, Selim. |
| The recent rise of food cost in world markets has accelerated the research examining the underlying factors for this rise. The present research investigated the separate and combined impacts of three factors thought to contribute to the price rise: adverse weather events, strong and sustained growth in high populated countries, and increased biofuels production. The research further analysed the effects of these price rises on consumption expenditures in Brazil, China and India. Analyses were carried out using a partial equilibrium trade model with a focus on the 2004 to 2007 period. The modelling suggests that the most important factor behind the price rise depends on the commodity, with maize/corn, oilseeds, and sugar most affected by biofuels, while... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Food prices; Partial equilibrium model; Biofuel; Agricultural and Food Policy; International Relations/Trade; F11; Q17. |
| Ano: 2009 |
URL: http://purl.umn.edu/51460 |
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| Hayes, Dermot J.; Babcock, Bruce A.; Fabiosa, Jacinto F.; Tokgoz, Simla; Elobeid, Amani E.; Yu, Tun-Hsiang (Edward); Dong, Fengxia; Hart, Chad E.; Chavez, Eddie C.; Pan, Suwen; Carriquiry, Miguel A.; Dumortier, Jerome. |
| We examined four evolution paths of the biofuel sector using a partial equilibrium world agricultural sector model in CARD that includes the new RFS in the 2007 EISA, a two-way relationship between fossil energy and biofuel markets, and a new trend toward corn oil extraction in ethanol plants. At one extreme, one scenario eliminates all support to the biofuel sector when the energy price is low, while the other extreme assumes no distribution bottleneck in ethanol demand growth when the energy price is high. The third scenario considers a pure market force driving ethanol demand growth because of the high energy price, while the last is a policy-induced shock with removal of the biofuel tax credit when the energy price is high. Standard results hold where... |
| Tipo: Journal Article |
Palavras-chave: Biofuel; EISA; Ethanol; Tax credit; World agricultural sector model; Agribusiness; Consumer/Household Economics; Crop Production/Industries; Demand and Price Analysis; International Relations/Trade; Livestock Production/Industries; Political Economy; Production Economics; Resource /Energy Economics and Policy; Q13; Q18; Q38. |
| Ano: 2009 |
URL: http://purl.umn.edu/53093 |
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| Crago, Christine Lasco; Khanna, Madhu. |
| A carbon tax would penalize carbon intensive fuels like gasoline and shift fuel consumption to less carbon intensive alternatives like biofuels. Since biofuel production competes for land with agriculture, a carbon tax could raise land rents, divert land towards fuel production, and raise agricultural prices. This paper analyzes the welfare effect of a carbon tax on fuel with gasoline and biofuel as available fuel choices, in the presence of a labor tax and biofuel subsidy. The second-best optimal carbon tax is also quantified. Findings show that when biofuels is part of the fuel mix, the carbon tax has a commodity price effect which arises from tax-induced changes in land rent. The commodity price effect could exacerbate or attenuate the tax interaction... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Carbon tax; Optimal fuel tax; Biofuel; Environmental Economics and Policy; Q42; Q48; Q54; H23. |
| Ano: 2010 |
URL: http://purl.umn.edu/60894 |
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| Neves,Cristina; Maroneze,Mariana Manzoni; Santos,Aline Meireles dos; Francisco,Erika Cristina; Wagner,Roger; Zepka,Leila Queiroz; Jacob-Lopes,Eduardo. |
| ABSTRACT This study aimed to evaluate third generation biodiesel production by microalgae Phormidium autumnale using cassava processing wastewater as a platform. Experiments were performed in a heterotrophic bubble column bioreactor. The study focused on the evaluation of the bioreactor (batch and fed-batch) of different operational modes and the analysis of biofuel quality. Results indicate that fed-batch cultivations improved system performance, elevating biomass and oil productions to 12.0 g L−1 and 1.19 g L−1, respectively. The composition of this oil is predominantly saturated (60 %) and monounsaturated (39 %), resulting in a biodiesel that complys with U.S., European and Brazilian standards. The technological route developed indicates potential for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microalgae; Cyanobacteria; Agroindustrial wastewater; Biofuel. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000500412 |
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| Zezza, Annalisa. |
| This paper tries to identify under which conditions voluntary certification could be an answer to the governance of sustainability at global level. The study addresses the case of biofuel sustainability certification in Brazil and the role of the EU Directive on biofuels. The case study has permitted to identify and analyze some of these factors as the degree of dependence from foreign market, the policy environment, the structure of the supply chain, the benefits and costs associated to certification as well as some unintended consequences. The research has been conducted through a case study in the state of Sao Paolo (Brazil). |
| Tipo: Presentation |
Palavras-chave: Biofuel; Certification; Brazil; EU; Sustainability; Environmental Economics and Policy. |
| Ano: 2012 |
URL: http://purl.umn.edu/124112 |
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| Caraschi,José C.; Viana,Ronaldo da S.; Moreira,Bruno R. de A.; Prates,Glaucia A.. |
| ABSTRACT The aim of this study was to evaluate the energetic potential achieved by the application of phyto-regulators to sweet sorghum cultivars. A randomized complete block design was used. Experiments were conducted using two sweet sorghum cultivars (BRS 508 and BRS 509), fourphyto-regulators (ethephon, ethyl-trinexapac, glyphosate, and sulfometuron-methyl), and a control; four replicates were performed 70 days after sowing, at the beginning of the flowering phase of the plants, with the aid of a CO2-pressurized coastal sprayer. The plants were harvested after 40 days, with the stems being cleared at the height of the apical bud, and were subjected to grinding for the extraction of broth. The following analyses were carried out: chemical (total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Green Energy; Bioenergy; Biofuel; Renewable energy. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000400426 |
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| Santos,Lilian Dena dos; Zadinelo,Izabel Volkweis; Moesch,Augusto; Bombardelli,Robie Allan; Meurer,Fabio. |
| Abstract: The objective of this work was to evaluate the use of crude glycerol as an energy source to replace corn, in diets for Nile tilapia (Oreochromis niloticus) in the fattening stage. Two hundred Nile tilapia (190±4.5 g) were distributed in 20 tanks, in a completely randomized design. The treatments consisted of crude glycerol at 0, 60, 120, 180, and 240 g kg-1, to replace the dietary levels of corn, in order to maintain a constant digestible energy. Fish productive performance and the chemical composition of the fillet were evaluated. Histological analyses of the hepatopancreas, intestine, and visceral fat were also carried out. Crude glycerol had no effect on the performance parameters; however, it caused a quadratic reduction of visceral fat.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oreochromis niloticus; Zea mays; Alternative feed; Biofuel; By-product. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000101104 |
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| Registros recuperados: 88 | |
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