|
|
|
Registros recuperados: 174 | |
|
| |
|
|
Alves, Yony Brugnolo; Costa, Gilberto Fernandes Da; Ribeiro, Joao Gabriel; Parre, Jose Luiz; Alves, Alexandre Florindo. |
O presente trabalho investigou, com as metodologias de causalidade segundo Granger e VECM, a relação entre o PIB Agropecuário brasileiro e as variáveis consumo de energia do setor, maquinário agrícola, rebanho bovino e produção de grãos no período de 1970 a 2005. O consumo de energia foi enfatizando devido à agropecuária ser produtora e consumidora desta. Os resultados apontam uma grande relação, no curto prazo, entre o PIB e o consumo de energia. Quando se considera o conjunto das variáveis encontrou-se evidência de causalidade segundo Granger, evidenciando a importância das variáveis selecionadas como variáveis explicativas do PIB agropecuário. --------------This study used Granger causality and VECM methodologies, to investigate the relationship between... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Energia; PIB Agropecuário; VECM; Causalidade segundo Granger; Energy; Agricultural GDP; VECM; Granger Causality; Agribusiness; Resource /Energy Economics and Policy. |
Ano: 2008 |
URL: http://purl.umn.edu/108096 |
| |
|
|
TURETTA, A. P. D.; FIDALGO, E. C. C.; PEDREIRA, B. da C. C. G.; GARCIA, E.; BONATTI, M.; MELLONI, G.; LÖHR, K.; MONTEIRO, J. M. G.; PRADO, R. B.; MOSTER, C.; MARTINS, A. L. da S.; MALHEIROS, T. F.; SIEBER, S.. |
Considering all the scenarios about population growth and the increasing demand for food, water and energy, we highlight the potential of MFA to provide a range of benefits - beyond its primary function that is to produce food - through the promotion of conservationist practices in rural landscapes. We presented a feasible methodology framework to evaluate the impact of rural practices on the FWE security nexus in the Atlantic Forest biome. The basis of this methodology is the use of secondary data and a participatory approach. Thus, we ensure a bottom-up approach, promoting the stakeholder engagement and a low cost, promoting its applicability. |
Tipo: Parte de livro |
Palavras-chave: Impacto; Práticas rurais; Sustentabilidade; Impact; Rural practices; Sustainability; Recurso Natural; Água; Alimento; Energia; Desenvolvimento Sustentável; Segurança Alimentar; Agricultura; Recurso Hídrico; Recurso Energético; Natural resources; Water; Foods; Energy; Sustainable development; Food security; Agriculture; Water resources; Energy resources. |
Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1142926 |
| |
|
|
TURETTA, A. P. D.. |
By 2030, it is estimated that the world population will be 8.3 billion people, increasing the pression in energy, water, food, land use and mineral extraction, especially in the developing world. These estimates indicate the immediate need to adopt interventions that can minimize these impacts. There is a lot of talk about sustainability, but it is still rare to make the results of integrated evaluations available on various topics. When considering the integrated Nexus Food-Water-Energy (F-W-E) assessment, this fact is even more challenging. Considering the importance of the agricultural sector in Brazil and the existence of areas in different stages of degradation, it becomes strategic for interventions that can generate socio-economic and environmental... |
Tipo: Anais e Proceedings de eventos |
Palavras-chave: Impacto Ambiental; Agricultura; Energia; Água; Uso da Terra; Alimento; Environmental impact; Agriculture; Energy; Water; Land use; Foods. |
Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1114264 |
| |
|
|
Herczeg, Rahel Sara; Suveges, Peter. |
A globális hőmérséklet-növekedés környezeti változásokhoz, a tengerszint emelkedéséhez, a csapadék mennyiségének és térbeli eloszlásának megváltozásához, szélsőséges időjárási viszonyokhoz vezet. Állat- és növényfajok kipusztulásának sebessége jelentősen nő. Bizonyos betegségek könnyebben elterjedhetnek. E fel¬sorolt hatásokból látható, hogy a mezőgazdaságot közvetlenül érinti a klímaváltozás. Fontos tehát, hogy a mezőgazdasági üzemek maguk is tegyenek a káros hatások enyhítéséért. Lehetséges megoldás a biomassza tüzelése, amely a mezőgazdasági rendeltetésű épületek és háztartások energiaköltségeit jelentősen mérsékli. Tanulmányunk olyan megoldást dolgoz ki, melyben a hő előállításához szükséges energia költsége teljes mértékben megszűnik, ami energiaerdő... |
Tipo: Journal Article |
Palavras-chave: Energia; Költség; Megtakarítás; Mezőgazdasági üzem; Háztartás; Energy; Costs; Savings; Agricultural plants; Households; Agribusiness; Community/Rural/Urban Development. |
Ano: 2009 |
URL: http://purl.umn.edu/92418 |
| |
|
|
Tong-sheng, Zhang. |
Based on the principles of hierarchy, representativeness, operability and completeness, 10 indices are selected from 3 aspects of resource consumption, energy consumption and environmental emissions during small town development. Comprehensive evaluation index system for industrial source-energy saving and pollution reducing in small towns in constructed. According to the fuzzy mathematical method, qualitative calculation model of two-level hierarchical structure is constructed. Among them, the first-level model focuses on each specific evaluation index. It calculates the membership degree of region to resource-energy and pollution reducing in evaluation index set, and sorts the calculation results. The second-level model focuses on the first-level... |
Tipo: Journal Article |
Palavras-chave: Small towns; Resource; Energy; Energy saving; Pollution reducing; China; Agribusiness. |
Ano: 2010 |
URL: http://purl.umn.edu/93239 |
| |
|
|
Kenagy,G.J.; Vásquez,Rodrigo A.; Nespolo,Roberto F.; Bozinovic,Francisco. |
We present an analysis of time and energy allocation in a day-active caviomorph rodent, the degu, Octodon degus, in central Chile. We quantified components of surface activity in the field on a daily basis in individual degus near the time of the summer solstice, when conditions of heat and aridity were also at a seasonal extreme, in order to answer the following questions. Does the absolute time available for surface activity limit performance? Does the allocation of time and energy for locomotion place a functionally significant limitation on overall energy balance and performance? Degus spent about 2/3 of their above-ground time foraging; they remained stationary about 88 % of the time, walked around slowly about 10 %, and were running rapidly from one... |
Tipo: Journal article |
Palavras-chave: Time; Energy; Activity; Central Chile. |
Ano: 2002 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000100014 |
| |
|
|
Gonçalves,CA; de Almeida,MA; Faria-Júnior,MJA; Pinto,MF; Garcia-Neto,M. |
Nutritionists need to make commercial decisions about the optimal nutrient content broiler feeds. In order to demonstrate that broiler prices may influence dietary nutrient density, this study developed quadratic feed intake and weight gain equations, according to broiler sex and feeding phase, to be applied in a nonlinear feed formulation model. Four hundred and eighty Cobb broilers were allotted to a completely randomized experimental with six treatments, each with four replicates of 10 birds each, from 1 to 56 days old. Treatments consisted of diets containing 2800, 2900, 3000, 3100, 3200, or 3300 kcal metabolizable energy (ME)/kg and constant nutrient to ME ratio. A nonlinear version of the PPFR feed formulation software (http://www.fmva.unesp.br/ppfr)... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy; Excel; Mathematical modeling; Nutrition; Response surface. |
Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000200173 |
| |
|
|
TURETTA, A. P. D.; FIDALGO, E. C. C.; PRADO, R. B.; MONTEIRO, J. M. G.; PEDREIRA, B. da C. C. G.; SCHULER, A. E.; DUARTE, G. T.. |
Considering the importance of the agricultural sector in Brazil and the existence of areas in different stages of degradation, it becomes strategic for interventions that can generate socio-economic and environmental benefits and positive impacts to the tripod F-W-E. Thus, the present study is based on the Ribeirão das Lajes dam (RJ), a core area for the water supply of the second largest city in Brazil - Rio de Janeiro. A methodological approach will be developed that will generate an integrated assessment tool to evaluate the impact of agriculture practices and its potentiality to ecosystem services provision in the Nexus F-W-E approach. |
Tipo: Anais e Proceedings de eventos |
Palavras-chave: Serviços ecossistêmicos; Multifuncionalidade da agricultura; Água; Alimento; Segurança Alimentar; Energia; Agricultura; Ecosystem services; Water; Food security; Energy; Agriculture. |
Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1114266 |
| |
|
| |
|
|
Marconato, Mariane Silva; Santini, Giuliana Aparecida. |
Durante muito tempo, os recursos fósseis e hídricos foram os grandes propulsores da civilização e da economia. O Brasil também se apoiou nessas fontes energéticas para o desenvolvimento de atividades industriais, agrícolas, de serviços e da própria sociedade. Entretanto, vive-se hoje uma crise no abastecimento energético, em função da problemática geopolítica, econômica e ambiental em torno da extração e comercialização desses recursos, uma vez que possuem ainda, caráter não renovável, portanto, finito na natureza. Os escassos investimentos governamentais e a abertura econômica do setor energético resultou no fim do monopólio energético, o que favoreceu a implantação de sistemas alternativos, na maioria, advindos da biomassa. Dentre esses, destaca-se a... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Energia; Fóssil; Hídrico; Renovável; Biomassa; Energy; Fossil; Water; Renewable; Biomass; Resource /Energy Economics and Policy. |
Ano: 2008 |
URL: http://purl.umn.edu/112629 |
| |
|
| |
|
| |
|
|
MANTOVANI, B. H. M.; PEART, R. M.; GIBSON, H.. |
Desenvolveu-se um modelo matematico, em SLAM II, para simular colheita e transporte de palhada de milho, feno e cavacos de madeira para abastecer continuamente uma unidade de processamento de biomassa. Usaram-se dez anos de dados climatologicos e de producao do estado de Indiana, EUA, para quantificar o efeito do clima no desempenho do sistema, que foi analisado em diferentes situacoes. O clima mostrou ser variavel importante, especialmente na colheita de palhada de milho e feno. Houve casos em que foi preferivel alugar equipamento do que comprar, para diminuir custos de producao. Foram produzidas, em media, 3,3 t/ha e 1,9 t/ha de palhada de milho e feno, respectivamente. Cavacos de madeira vindos de corte de florestas naturais totalizaram 86 t/ha, de... |
Tipo: Artigo de periódico |
Palavras-chave: Modelos matematicos; Sistema; Cavacos; Corn residue; Simulation; Harvest; Biomassa; Colheita; Energia; Etanol; Madeira; Milho; Palhada; Produção; Simulação; Biomass; Energy; Ethanol production; Wood chips. |
Ano: 1985 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/471688 |
| |
|
| |
|
|
Zhang,Sen; Song,Ping; Li,Shuang. |
Abstract The effect of the intracellular microenvironment in the presence of an oxygen vector during expression of a fusion protein in Escherichia coli was studied. Three organic solutions at different concentration were chosen as oxygen vectors for fumarase expression. The addition of n-dodecane did not induce a significant change in the expression of fumarase, while the activity of fumarase increased significantly to 124% at 2.5% n-dodecane added after 9 h induction. The concentration of ATP increased sharply during the first 6 h of induction, to a value 7600% higher than that in the absence of an oxygen-vector. NAD/NADH and NADP/NADPH ratios were positively correlated with fumarase activity. n-Dodecane can be used to increase the concentration of ATP... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oxygen vector; Energy; Fusion protein; Expression; Redox metabolism. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000300662 |
| |
|
| |
|
| |
|
|
TEIXEIRA, A. H. de C.; AZEVEDO, P. V. de; SILVA, B. B. da; SOARES, J. M.. |
Durante o ano de 1994, um experimento foi conduzido em Petrolina,PE, Brasil latitude 09o09' S, longitute 40o24' W, altitude 365,5 m. Os componentes do balanco de energia foram avaliados na cultura da videira, com dois anos de idade, variedade Italia, conduzida sob um sistema de latada, 4 m x 2 m. A media de todas proporcoes diarias da radiacao solar global para o saldo de radiacao, nos dias irrigados foi 3% maior que para os dias nao irrigados. A media de todas porcoes diarias do saldo de radiacao transformadas em fluxo de calor latente de evaporacao para os dias irrigados foi 7% maior que para os dias nao irrigados, enquanto que a media de todas as porcoes diarias transformadas em fluxo de calor sensivel e fluxo de calor no solo para os dias irrigados... |
Tipo: Parte de livro |
Palavras-chave: Microaspersor; Balanco; Variacao; Grape; Balance; Variation; Clima; Energia; Irrigação; Uva Itália; Vitis Vinifera; Climate; Energy; Sprinkler irrigation. |
Ano: 1996 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/133581 |
| |
|
|
Khan, Muhammad Tahir; Brulé, Mathieu; Maurer, Claudia; Argyropoulos, Dimitrios; Müller, Joachim; Oechsner, Hans. |
Different fractions of banana (stalk, peel, and flesh) as well as the whole unpeeled banana were studied in a laboratory Biochemical Methane Potential (BMP) assay. After completion of 35-day digestion at 37°C in 2L-reactors, specific methane yields reached 0.256, 0.322, 0.367 and 0.349 m³/kg VS (volatile solids) for stalk, peel, flesh, and unpeeled banana respectively. Considering the country of Uganda, East Africa, the collection of peels and stalks from banana production would yield a theoretical potential of about 60 GWh of electrical energy per year in biogas plants. In order to verify the suitability of banana fractions to the biogas process, their chemical composition was analyzed, and their methane production kinetics was estimated with exponential... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy biogas; Anaerobic digestion; BMP assay; Model; Energy; Methane; Waste. |
Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3244 |
| |
Registros recuperados: 174 | |
|
|
|