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| Registros recuperados: 143 | |
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| Jimenez Yan, L; Brito, A; Cuzon, Gerard; Gaxiola, G; Garcia, T; Taboada, G; Soto, L; Brito, R. |
| L. vannamei postlarvae are normally raised with a protein dense diet (50% protein) rich in fishmeal. Part of the protein is utilized for energy purpose instead of protein synthesis. Based on a previous energy partitioning study, the effects of two isoenergetic compounded feed treatments - animal protein (AP) and vegetable protein and carbohydrates (VPC) - upon growth efficiency and energy budget of shrimp postlarvae and early juveniles were determined. Recovered energy (RE) or production (P) after 50 days trial was similar (2 J day(-1)) in both treatments, from PL14 to PL19. However, early juveniles discriminated between animal protein (116 J day(-1)) and vegetable protein and carbohydrates (88 J day(-1)). The difference in respiration indicated a higher... |
| Tipo: Text |
Palavras-chave: Shrimp; Physiology; Vegetable protein; Animal protein; Energy; Juvenile; Postlarvae. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1879.pdf |
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| Alfaro Lucas, Joan Manel; Pradillon, Florence; Zeppilli, Daniela; Michel, Loic; Martinez‐arbizu, P; Tanaka, H; Foviaux, M; Sarrazin, Jozee. |
| Productivity and environmental stress are major drivers of multiple biodiversity facets and faunal community structure. Little is known on their interacting effects on early community assembly processes in the deep sea (>200 m), the largest environment on Earth. However, at hydrothermal vents productivity correlates, at least partially, with environmental stress. Here, we studied the colonization of rock substrata deployed along a deep‐sea hydrothermal vent gradient at four sites with and without direct influence of vent fluids at 1700 m depth in the Lucky Strike vent field (Mid‐Atlantic Ridge, MAR). We examined in detail the composition of faunal communities (>20 µm) established after two years and evaluated species and functional patterns. We... |
| Tipo: Text |
Palavras-chave: Colonization; Community assembly; Energy; Environmental filtering; Functional beta-diversity; Species beta-diversity. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00641/75342/76070.pdf |
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| Muller-feuga, Arnaud. |
| Industrial potentialities related to biotechnology of microalgae are examined, highlighting a wide spectrum of applications which concern principally nutrition, health, environment and energy. The french situation of research on microalgae, especially at Ifremer, is assessed, showing that the main axis are fine chemistry, aquaculture, environment, bio-process engineering. It covers the majority of the applications, but leaves in shade certain important aspects such as human food and CO2 fixation. Concerning the general approach, some significant improvements can be expected from a more accurate control of bacteriological and genetic quality of cultures. About the industrial aspects, a national initiative seems in progress. The variety of potential... |
| Tipo: Text |
Palavras-chave: Process engineering; Energy; Environment; Health; Food; Aquaculture; Biotechnology; Microalgae; Génie des procédés; Energie; Environnement; Santé; Alimentation; Aquaculture; Biotechnologie; Microalgues. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/1997/rapport-1092.pdf |
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| Maldonado, Carlos; Cuzon, Gerard; Guzman, Emilio; Brito, Roberto; Soto, Luis; Arena, Leticia; Gaxiola, Gabriela. |
| Herbivorous (20% vegetable protein, 40% carbohydrate) and carnivorous diets (40% marine animal protein, 20% carbohydrate) were experimentally tested to assess their effect on the energy balance and energetic substrates utilized by postlarvae (PL's /15 days) and juvenile shrimp (3-6 g) of Litopenaeus vannamei. Postlarval stage 60 (PL60, early juveniles) shrimps fed HeD and CaD diets, then late juveniles (3-6 g) acclimated to the same diets were tested for their respective energy partitioning potential. No significant differences (p>0.05) on growth were obtained in early juveniles (mean final wet weight of 0.19 g). However in late juvenile stages a significant difference (p<0.05) in growth rate was observed. In terms of energy partitioning, both early... |
| Tipo: Text |
Palavras-chave: Energy; Juveniles; Metabolism; Protein sources; Shrimp. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-7402.pdf |
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| Bentamy, Abderrahim; Croize-fillon, Denis. |
| The main objective of this paper is to thoroughly examine the remotely sensed wind characteristics around the coasts of Brittany as well as some more specific areas. The offshore wind power potential is then assessed. To achieve this objective, information on wind speed and direction with sufficient spatial and temporal sampling under all weather conditions and during day and night is required. This study uses more than 12 years (December 1999–December 2012) of consistent remotely sensed data retrieved from the ASCAT and QuikSCAT scatterometers to estimate the conventional moments and associated wind distribution parameters. The latter are comparable to wind observations from meteorological stations. Furthermore, combining in-situ and scatterometer wind... |
| Tipo: Text |
Palavras-chave: Wind; Energy; Scatterometer; Remote sensing; Brittany. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00175/28648/28552.pdf |
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| Bacca, Helene; Huvet, Arnaud; Fabioux, Caroline; Daniel, Jean-yves; Delaporte, Maryse; Pouvreau, Stephane; Van Wormhoudt, A; Moal, Jeanne. |
| To investigate the control at the mRNA level of glycogen metabolism in the cupped oyster Crassostrea gigas, we report in the present paper the cloning and characterization of glycogen phosphorylase and synthase cDNAs (Cg-GPH and Cg-GYS, respectively, transcripts of main enzymes for glycogen use and storage), and their first expression profiles depending on oyster tissues and seasons. A strong expression of both genes was observed in the labial palps and the gonad in accordance with specific cells located in both tissues and ability to store glucose. Cg-GPH expression was also found mainly in muscle suggesting ability to use glycogen as readily available glucose to. supply its activity. For seasonal examinations, expression of Cg-GYS and Cg-GPH genes... |
| Tipo: Text |
Palavras-chave: Reproduction; Regulation; Oyster; Glycogen; Expression; Gene; Energy; Crassostrea gigas; Bivalve. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-435.pdf |
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| Aoki,C; Lopes,FS; de Oliveira,AMR; Souza,FL de; Marques,MR. |
| Large-bodied arthropods, such as cicadas, can be able to reallocate significant amounts of nutrients during adult emergence. Evidence suggests that Quesada gigas Olivier emergence constitutes an important nutrient flux from belowground to aboveground. The purpose of this study was to estimate the amount of nitrogen, proteins, and lipids resulting from the emergence of Q. gigas in an urban ecosystem in Central Brazil. Adult specimens captured from September to November 2006 were weighed and submitted to biochemical analysis. Population density was approximately 4,200 individuals per hectare. Mean individual dry mass was 1.03 g and contained 12.6% proteins, 8.4% lipids, and 5% nitrogen. Total biomass input from the species was 4.3 kg ha-1 y-1, with a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Annual cicada; Biomass; Energy; Nutrient cycling; Chain feed. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000400004 |
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| Vega Desdín, F.M.; Fernández Vila, L.J.; Viamonte Fernández, J.L.; Díaz Díaz, J.E.. |
| Estudios oceanográficos realizados en aguas marinas cubanas han permitido identificar grandes diferencias de temperatura en la distribución vertical de las aguas oceánicas adyacentes; estos gradientes térmicos pueden utilizarse para la generación de energía eléctrica a partir del uso de energía térmica marina. Esta tecnología tiene ventajas secundarias, debido a que el agua fría bombeada desde las profundidades es rica en sustancias nutritivas y sin agentes patógenos la que puede ser utilizada en el cultivo de especies marinas. Otras fuentes de energía marina que pueden ser utilizadas como generadoras de energía eléctrica se relacionan con las mareas y la intensidad de las corrientes marinas, sobre todo en canales y pasas donde los flujos se incrementan. |
| Tipo: Preprint |
Palavras-chave: Energy; Energy; Http://aims.fao.org/aos/agrovoc/c_2565. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/3603 |
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| Cai, Yang; Guo, Pu; Fang, Wendong. |
| 20-day in-situ ADCP current and CTD data are used to investigate the characteristics and energy of the internal tides in the northern South China Sea (NSCS). The results show that the O1, K1, M2 and S2 constituents of internal tides are energetic and diurnal constituents (O1 and K1) are dominating. In the observational period, the current vectors of these four constituents all rotate clockwise and the maximum semi-major axe of internal tidal ellipses is more than 14 cm/s. The variation of ocean temperature shows that the internal tides present obvious quasi-diurnal oscillation and the average amplitude reaches 50 m. Furthermore, these internal tides carry high energy and appear to be intermittent. The maximum values of KE (PE) during the observational... |
| Tipo: Journal Contribution |
Palavras-chave: Internal tides; In situ measurements; Energy. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5844 |
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| Protásio, Thiago de Paula; Trugilho, Paulo Fernando; de Siqueira, Humberto Fauller; de Melo, Isabel Cristina Nogueira Alves; Andrade, Carlos Rogério; Guimarães Junior, José Benedito. |
| O objetivo deste estudo foi avaliar pellets torrificados e in natura,produzidos a partir da madeira residual de Pinus, destinados ao uso bioenergético. A compactação da madeira residual de Pinus sp. oriunda de serraria foi realizada em uma peletizadora com matriz plana de 8 mm. As torrefações foram realizadas em forno elétrico, tipo mufla, estabilizado em temperaturas finais de 220 °C e 250 °C por 30 min. Foram determinadas as seguintes propriedades nos pellets: densidades aparente e energética unitárias, densidades a granel e energética do granel, composição química imediata (materiais voláteis, cinzas e carbono fixo), poder calorífico superior e umidade. Observou-se aumento do poder calorífico superior e redução do teor de umidade nos pellets... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Recursos Florestais; Engenharia Florestal; Energia da Biomassa Florestal. Densificação; Tratamento térmico; Biomassa florestal; Energia Densification; Heat treatment; Forestry biomass; Energy. |
| Ano: 2015 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/843 |
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| Paula, Luana Elis de Ramos e; Trugilho, Paulo Fernando; Rezende, Raphael Nogueira; Assis, Claudinéia Olímpia de; Baliza, Ana Elisa Rodarte. |
| This study aimed to produce and evaluating the briquettes made from residues of plant biomass and test different times and temperatures. The material utilized was composed of wood processing residues (wood shaving and sawdust), coffee bean parchment and coffee tree stem, beam stem and pod, soybean stem and pod, rice husk, corn leaf, stem, straw and cob and sugar cane straw and bagasse. Briquetting was performed at a pressure of 150 Bar. Different times were tested for briquetting sawdust from wood and different temperatures for rice husk and parchment coffee. For evaluation of the briquettes quality, the apparent relative density, compression resistance and combustion index were determined. The results indicated that the briquetting time and temperature... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy; Biomass; Briquetting Energia; Biomassa; Briquetagem. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/253 |
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| 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 |
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| 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 |
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| Rosson, C. Parr, III. |
| These three invited papers examine the role that exchange rates may have in influencing commodity prices, input prices and farm income. The papers arguably represent one of the most important recent attempts to quantify and explain these new linkages. As U.S. and world agriculture moves from a period of high output prices to a period of lower prices, understanding the impact of macroeconomic variables on farm input costs and farm income will become more important. Further, it will be equally important for policy makers to undertake appropriate market interventions in order to have maximum effectiveness should this period of cost-price-squeeze continue to intensify. Each of the papers has something significant to contribute to the understanding and debate... |
| Tipo: Journal Article |
Palavras-chave: Energy; Exchange rates; Macropolicy; Markets; Trade; Agribusiness; Farm Management; Financial Economics; Marketing; Resource /Energy Economics and Policy; F42. |
| Ano: 2009 |
URL: http://purl.umn.edu/53098 |
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| Registros recuperados: 143 | |
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