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| Registros recuperados: 35 | |
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| Mantoam, Edemilson J; Mekonnen, Mesfin M; Romanelli, Thiago Libório. |
| The intensification of agricultural production systems demand power, supplied by agricultural machinery, besides more agricultural inputs such as fertilizer, pesticides and seeds. Agricultural mechanization provided increase in the global production of food, fiber and bioenergy; and it brought economic benefits to producers, but causing larger energy consumption. Energy embodiment in agricultural machinery has been approached, but data usually are from car industry. This study aimed to determine the energy demand in a plant that assembles five types of agricultural machinery from a multinational manufacturer located in Piracicaba municipality in Sao Paulo state, Brazil. That plant assembles two types of sugarcane harvester, coffee harvesters, sprayers and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural engineering mechanization; Industrial process; Life cycle assessment; Energy balance; Sustainability. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4831 |
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| Higa,T.S.; Bergamo,F.C.; Mazzucatto,F.; Fonseca-Alaniz,M.H.; Evangelista,F.S.. |
| The relationship of body weight (BW) with white adipose tissue (WAT) mass and WAT gene expression pattern was investigated in mice submitted to physical training (PT). Adult male C57BL/6 mice were submitted to two 1.5-h daily swimming sessions (T, N = 18), 5 days/week for 4 weeks or maintained sedentary (S, N = 15). Citrate synthase activity increased significantly in the T group (P < 0.05). S mice had a substantial weight gain compared to T mice (4.06 ± 0.43 vs 0.38 ± 0.28 g, P < 0.01). WAT mass, adipocyte size, and the weights of gastrocnemius and soleus muscles, lung, kidney, and adrenal gland were not different. Liver and heart were larger and the spleen was smaller in T compared to S mice (P < 0.05). Food intake was higher in T than S mice... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Swimming training; Energy balance; White adipose tissue; WAT gene expression; C57BL/6 mice. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012001000016 |
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| Marín Sosa, Ma. Isabel. |
| Los intercambios de energía y masa entre la superficie de la tierra y la atmósfera controlan la disposición de agua en el planeta, por lo que su conocimiento y modelación es importante. A escalas regionales, como los distritos de riego, el tema se ha abordado usando sensores remotos en satélites, donde el escalamiento de las mediciones de campo a las áreas de influencia o footprints de las observaciones satelitales deben ser intercomparables. A nivel de campo, se ha empleado la técnica de covarianza de vórtices para medir de forma directa los flujos de energía y masa, no obstante, se han encontrado problemas en el cierre de los balances, que se argumenta son producto del uso de diferentes footprints de las componentes del balance de energía. Así, en el... |
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Palavras-chave: Cierre balance de energía; Modelo uni-paramétrico de la geometría sol-sensor; Temperatura aerodinámica; Eddy Covariance; Temperatura radiativa; Albedo; Balance de energía; Función de distribución bidireccional de la reflectancia; Función de distribución bidireccional de la emisividad; Energy balance closure; Sun-sensor uni-parametric model; Aerodynamic temperature; Eddy covariance technique; Radiative temperature; Energy balance; Bidireccional reflectance distribution function; Bidireccional emissivity distribution function; Hidrociencias; Doctorado. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2035 |
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| Dalla Marta, Anna; DIPSA-University of Firenze; anna.dallamarta@unifi.it; Natali, Francesca; DIPSA-University of Firenze;; Mancini, Marco; DIPSA-University of Firenze;; Ferrise, Roberto; DIPSA-University of Firenze;; Bindi, Marco; DIPSA-University of Firenze;; Orlandini, Simone; DIPSA-University of Firenze;. |
| The contribution of agrobiomasses, as a source of energy, to the reduction of greenhouse gas emissions was confirmed by several studies. Biomass from agriculture represents one of the larger and more diverse sources to exploit and in particular ethanol and diesel have the potential to be a sustainable replacement for fossil fuels, mainly for transport purposes. However, the cultivation of energy crops dedicated to the production of biofuels presents some potential problems, e.g., competitiveness with food crops, water needs, use of fertilizers, etc., and the economic, energy, and environmental convenience of such activity depends on accurate evaluations about the global efficiency of the production system. In this study, the processes related to the... |
| Tipo: Peer-Reviewed Insight |
Palavras-chave: Agroenergy; Bioethanol; Energy balance; Pure vegetable oil; Water balance. |
| Ano: 2011 |
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| Jordan,Rodrigo A.; Gomes,Eder P.; Biscaro,Guilherme A.. |
| The energy balance for the production of sunflower oil and cake was carried out during the agricultural and industrial stage phase, where it was considered a cold extraction by hydraulic pressing, with the plant location in a rural area with a radius of 30km range. Data on productivity was used in two varieties of sunflower (Helio 358 and Aguará 04) grown in different seasons (2007/2008, 2008/2009), under different irrigation levels. Data showed that irrigation resulted in an increase in productivity of both varieties, and the best response was observed for Aguará 04 variety. Moreover, the increased intensity of irrigation negatively affected the energy balance, reducing the ratio between energy produced and energy used in the production chain. The most... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioenergy; Sunflower; Irrigation; Energy balance. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000600006 |
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| Filgueiras,Roberto; Mantovani,Everardo C.; Althoff,Daniel; Dias,Santos H. B.; Cunha,Fernando F. da. |
| ABSTRACT Surface temperature (Ts) is a determining factor to obtain energy balance parameters, being relevant to understand the influence of this variable on the estimation of evapotranspiration. Thus, the objective of this study was to simulate errors in Ts estimation to verify the consequences of actual evapotranspiration (ETa) estimated by the SAFER (Simple Algorithm for Evapotranspiration Retrieving) model. For this, an image of the Landsat-8 satellite was used to induce errors from 0.2K to 10K in the variable Ts, allowing verifying the consequences in the ETa data. After the estimations of Ts and ETa, the quantitative consequences and dynamics of Ts impact on the ETa data were verified along the different land uses in the study area. The results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy balance; Irrigated areas; Remote sensing; NDVI. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000800023 |
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| Araujo,Alisson V. de; Brandão Junior,Delacyr da S.; Colen,Fernando. |
| The aim of this study was to analyze, under the energetic point of view, the cultivation of corn in three management systems (low, medium and high-tech), using two landrace varieties ('Argentino' and 'BR da Várzea'), a double hybrid cultivar (SHS 4080) and a simple hybrid (IAC 8333). Five performance indicators were used: energy efficiency, liquid cultural energy, cultural efficiency, energy balance and productive energy efficiency. From the perspective of family farming, it was verified the largest social importance of the systems under low and medium levels of technology, due to the increase employment capacity of rural labor. The liquid cultural energy and energy balance were more favorable for the system under high technological level, unlike cultural... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy balance; Cultural efficiency; Productive energy efficiency; Sustainability; Zea mays L. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400004 |
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| Franco Junior,Nelson C.; Milan,Marcos; Romanelli,Thiago L.. |
| Citrus orchards are very important in Brazil, especially in São Paulo State, where occupy an area of 600,000 ha approximately. To identify sustainability degree of citrus production system, an energy analysis allows evaluating efficiency of direct and indirect applied inputs. Thus, this study aimed to evaluate citrus production system under energetic point of view, in which invested energy is paid back with citrus production; being compared within three scenarios for operational field efficiency. As result, by sensitivity analysis was determined that fuel was the main energy demander, followed by pesticides and fertilizers. In operational work capacity analysis, all combinations between efficiency (minimum, typical and maximum) and yield levels became... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy balance; EROI; Machinery management; Sustainability. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000400014 |
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| Aguila, J; Cuzon, Gerard; Pascual, C; Domingues, P; Gaxiola, G; Sanchez, A; Maldonado, T; Rosas, C. |
| As has been demonstrated in previous studies, Octopus maya can be fed on artificial diets. In the present study six different diets were assayed. Five diets were designed to test the effect of percentage of inclusion of fish protein concentrate (CPSP: 0, 5, 10, 15, and 20%) and were offered to octopuses as a specifically designed artificial diet. The sixth diet consisted of frozen crab (Callinectes spp) and was used as control diet. Blood metabolites and energy budget of octopuses were evaluated to determine how CPSP levels modulate the digestive capacity and allow retaining energy for growth. Wild animals (316.4 +/- 9.8 g) were used in the study. Results showed that CPSP produced a positive specific growth rate (SGR, % day(-1)) with high value in... |
| Tipo: Text |
Palavras-chave: Energy balance; Blood metabolites; Nutrition; Octopus maya. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3638.pdf |
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| Registros recuperados: 35 | |
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