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Reduction du nitrate dans les sediments marins. Comparaison des activites mesurees in vitro et in situ ArchiMer
Esteves, J; Bonin, P; Blanc, F; Mille, G; Bertrand, J.
In vitro nitrate reduction in hydrocarbon-polluted marine sediments has been studied by flow-through system. By analysing the rate of nitrate comsumption as a function of nitrate concentration the authors determined the Michaelis-Menten kinetics parameters. (km = 330 mu M; vax = 2.0 mu M/g super(-1)/h super(-1). The authors found a value of 60 mu M/m super(-2)/h super(-1) for the rate of in vitro nitrate consumption derived from the above kinetic parameters and from the nitrate concentration in the sediment. In parallel a value of 67.4 mu M/m super(-2)/h super(-1) was found for the rate of nitrate consumption under in situ conditions. The great similarity between both results would favor the in vitro technique as a valid and more convenient one.
Tipo: Text Palavras-chave: MED; Biogeochemistry; Oil pollution; Methodology; Environmental conditions; Experimental research; Comparative studies; Metabolism; Bacteria; Sediment chemistry; Reduction; Nitrates; Denitrification; Nitrogen cycle.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-979.pdf
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Research on lithium-phytological metabolismand recovery of hypo-lithium. Repositório Alice
MAGALHAES, J. R.; WILCOX, G. E.; ROCHA, A. N. F.; SILVA, F. I. M..
Os vegetais sao rica fonte de minerais na dieta humana. Foi demonstrado que o litio, mineral nao essencial em plantas, tem importante papel na normalidade psicossomatica do homem, com seu uso relacionado a problemas de saude, tais como hipertensao, depressao, balanco hormonal, leucemia, diabetes, caries e funcoes imunologicas, entre outros. Para determinar a absorcao de litio em plantas, conduziu-se um experimento em casa de vegetacao, em solucao nutritiva, com rabanete, alface e agriao, usando-se 0,1; 1,0 e 2,0 mM de litio. Trinta dias apos o transplante, as plantas foram coletadas e sues pesos frescos e de materia seca bem como concentracao de nutrientes foram analisados. Em geral, o litio aumentou a absorcao de ferro, mas nao afetou a absorcao de outros...
Tipo: Artigo de periódico Palavras-chave: Hipolitmia; Recuperacao; Metabolizacao; Litiofitologica; Watercross; Radish; Trace element; Hypo lithium; Lethium phytological; Agrião; Alface; Rabanete; Lettuce; Metabolism.
Ano: 1990 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/471699
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Residual feed intake and hematological and metabolic blood profiles of lle de France lambs R. Bras. Zootec.
Paula,Edson Ferraz Evaristo de; Souza,Damaris Ferreira de; Monteiro,Alda Lúcia Gomes; Santana,Miguel Henrique de Almeida; Gilaverte,Susana; Rossi Junior,Paulo; Locatelli Dittrich,Rosangela.
The objectives of this study were to estimate the phenotypic correlations of residual feed intake (RFI) and gross feed efficiency (GFE) with hematological and metabolic blood profiles of lambs and to determine the differences for these traits in animals of different RFI classes. Twenty Ile de France male lambs, 115±8 days of age and 31.3±4.1 kg of body weight (means ± SD), were individually housed and their dry matter intake was measured over 65 days. They were weighed every 13 days to determine the average daily weight gain and two blood samples were collected at the last two weighings (at 07h30) for analysis of blood variables. The animals were divided into two classes: negative RFI (most efficient: <0.5 SD below the mean; n = 6) and positive RFI...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Blood biochemistry; Feed efficiency; Hematology; Metabolism; Sheep.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001100007
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Residues of carbosulfan and its carbofuran metabolites and 3-hydroxy-carbofuran in oranges Rev. Bras. Frutic.
Trevisan,Marcos José; Baptista,Gilberto Casadei de; Trevizan,Luiz Roberto Pimentel; Papa,Geraldo.
The objectives of this study were to evaluate the residues of the insecticide carbosulfan and its carbofuran metabolites and 3-hydroxy-carbofuran in orange compartments (whole fruit, bagasse and juice) and comparison between the residual levels found in fruits with the maximum residue level and the safety interval established by the Brazilian legislation. Two field experiments were carried out, both with the following treatments: a-check; b-one application of 10 g of carbosulfan . 100 L-1 of water; c-one application with twice the rate applied in treatment b; d-four applications with the same rate applied in treatment b. Samples were taken at (-1), zero, 1, 3, 7, 14, 21 and 28 days after the last or unique application. The quantitative determinations were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citrus sinensis; Metabolism; Pesticide residues in citrus; Maximum residue level; Safety interval.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452004000200012
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Role of bacteria in the gastral cavity of Anthozoa. ArchiMer
Herndl, G; Velimirov, B.
Bacterial density of the coelenteric fluid (CF) of some anthozoan species was determined in situ and under laboratory conditions. In all species examined bacterial density of the CF was higher in the gastral cavity than in ambient ranging from 10 super(5) up to 5 x 10 super(6) cells. ml super(-1). Incubation experiments with the CF indicate that a bacterial population within the coelenteron is efficiently controlled by the CF, favoring bacterial growth if bacterial densities are low in the CF and showing clearance activity at high bacterial densities. Feeding of pre-starved anthozoans caused a rapid response of coelenteric rod-shaped bacteria. Evidence is presented that coelenteric bacteria are digested periodically although they contribute 1% to the...
Tipo: Text Palavras-chave: Anthozoa; Coelomic fluids; Bacteria; Microorganisms; Interspecific relationships; Metabolism; Nutrition.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-989.pdf
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Seasonal and diurnal variability in carbon respiration, calcification and excretion rates of the abalone Haliotis tuberculata L. ArchiMer
Chapperon, Coraline; Clavier, Jacques; Dugué, Clément; Amice, Erwan; Le Goff, Marion; Roussel, Sabine.
Abalone (Haliotis spp.) are commercially important marine shellfish species worldwide. Knowledge about the physiology of abalone that impacts life-history traits is important for a better understanding of the biology of the species and the impact of stressful husbandry procedures at different seasons. The present study quantified the seasonal and diurnal variations in four physiological parameters of the European species Haliotis tuberculata, i.e. carbon aerial and aquatic respiration, calcification and excretion rates, and the effect of prolonged aerial exposure upon abalone aerial respiration. We also investigated the effect of individual size upon these physiological parameters. Aquatic respiration and calcification rates showed an allometric...
Tipo: Text Palavras-chave: Ormer; Metabolism; Carbon fluxes; Physiology.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00431/54243/55886.pdf
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Seasonal variation of the effect of high-carbohydrate and high-protein diets on the intermediate metabolism of Parastacus brasiliensis (Crustacea, Decapoda, Parastacidae) maintained in the laboratory Iheringia, Sér. Zool.
Dutra,Bibiana K.; Silva,Karina M. da; Zank,Caroline; Conter,Maria R.; Oliveira,Guendalina T..
The goal of this study was to evaluate the effect of a high-carbohydrate diet (HC) and a high-protein diet (HP) on the metabolism of the crayfish Parastacus brasiliensis (Von Martens, 1869), collected in different seasons and maintained in the laboratory for 15 days. Crayfish were collected monthly from January 2002 to January 2004 at São Francisco de Paula, Southern Brazil, in Guarapirá stream. In the laboratory, the animals were kept submerged in aquariums under controlled conditions. They were fed ad libitum, for 15 days with either a HC or HP diet. At the end of this period, haemolymph samples were collected, as were hepatopancreas, gills, and abdominal muscle that were removed for determination of glycogen, free glucose, lipids, and triglycerides. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crayfish; Experimental culture; Diet; Metabolism; Seasonality.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000400003
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Short term variations in feeding and metabolism of Acartia tonsa (pelagic copepod) in the Berre lagoon (France) ArchiMer
Gaudy, R; Pagano, M; Cervetto, G; Saintjean, L; Verriopoulos, G; Beker, B.
Feeding, respiration, and ammonia excretion of Acartia tonsa were studied in a brackish lagoon, near Marseilles (Southern France). The experiments were performed during the same season in two successive years, using naturally occurring particles as food. Strong variations in both quantity and quality of food particles were recorded between the two series of experiments. The ingestion of particles according to their size was studied by means of the Coulter Counter technique. Females ingested more food than males. In both sexes, there was a tendency to select median to large particles, regardless of the shape of the particles-size spectrum. In 1990, the specific production rate, deduced from the energy budget, was equivalent to or greater than the observed...
Tipo: Text Palavras-chave: Acartia tonsa; Feeding; Metabolism; Production.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00096/20731/18368.pdf
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Sodium chloride added to transport water and physiological responses of Matrinxã Brycon amazonicus (Teleost: Characidae) Acta Amazonica
Urbinati,Elisabeth Criscuolo; Carneiro,Paulo César Falanghe.
The addition of salt to the water has been used to mitigate stress and improve survival in fishes. This study investigated the effects of sodium chloride (0.0, 1.0, 3.0 and 6.0 g/l) on levels of plasma cortisol, glucose, tryacilglycerol, total protein, hematocrit, hemoglobin, erythrocyte number, liver glycogen and lipid, and muscle lipid in adult matrinxã(Brycon amazonicum) after a 4-h transport and during a 96-h recovery period. Fish were sampled before and after transport, and 24 and 96 h of the recovery period. Plasma cortisol was higher than initial condition immediately after transportation, except in fish transported in 3.0 and 6.0 g/l of salt. A similar pattern was observed for blood glucose but fish transported in water with 0.0, 1.0 and 3.0 g/l of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Salt; Transport; Metabolism.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672006000400020
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Specific fatty acids as metabolic modulators in the dairy cow R. Bras. Zootec.
Pires,J.A.A.; Grummer,R.R..
This review summarizes recent developments on the utilization of specific fatty acids to modulate bovine energy metabolism, with emphasis on the periparturient dairy cow. A number of experiments have assessed the effects of polyunsaturated fatty acids on bovine hepatic energy metabolism using in vitro and in vivo models. Treatment of hepatocytes with specific fatty acids altered energy metabolism in vitro. For example, linolenic acid seemed to decrease hepatocyte triacylglycerol accumulation. This effect was confirmed in vivo, using parenteral infusions of emulsions derived from different fat sources to feed-restricted non-lactating cows. Additionally, polyunsaturated fatty acids can increase whole body response to insulin, potentially enhancing...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bovine; CLA; Linseed; Fish oil; Metabolism; Polyunsaturated fatty acid.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008001300033
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Sprint swimming performance of juvenile European sea bass ArchiMer
Nelson, J; Claireaux, Guy.
Despite its potential for determining animal success in a variety of ecologically important situations, very little is known about the sprint swimming performance of fishes. To evaluate whether selection on sprint swimming performance occurs in the wild, one must first demonstrate measurable and reproducible variation of sprint performance. In this study, we employ a computer-controlled laser detection system to study the sprint performance of 75 juvenile European sea bass Dicentrarchus labrax raised under uniform conditions in the laboratory. This percichthyid is a prized sport and food fish in Europe and similar ecologically to the North American striped bass Morone saxatilis. Individual European sea bass were subjected to endurance swimming performance...
Tipo: Text Palavras-chave: Dicentrarchux labrax; Juveniles; Computer laser detection; Endurance; Metabolism; Swimming performance; Fish.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-887.pdf
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Stover fodder quality traits for dual-purpose sorghum genetic improvement Open Agri
Blümmel, M..
Palavras-chave: Nitrogen; Sorghum; Organic matter; Body weight; Bioreactors; Genetic improvement; Sampling; Aromatic compounds; Forecasting; Metabolism.
Ano: 2006 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3197
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Substitution of fish meal with plant protein sources and energy budget for white shrimp Litopenaeus vannamei (Boone, 1931) ArchiMer
Suarez, J. A.; Gaxiola, G.; Mendoza, R.; Cadavid, S.; Garcia, G.; Alanis, G.; Suarez, A.; Faillace, J.; Cuzon, Gerard.
Fish meal (FM) has long been considered an essential ingredient for the formulation of shrimp feeds. Until recently, 12%FM was considered a minimum amount, below which weight gain would become reduced due to a reduction in feed intake. In order to test this perceived minimum value, an experiment was conducted on a long-term basis with 4 replicates. Four practical isonitrogenous and isoenergetic diets were formulated for Litopenaeus vannamei juveniles. Survival, weight gain, feed conversion ratio (FCR) and protein efficiency ratio were determined for 0, 6, 10 and 15% FM diets and a reference diet. Shrimp survival ranged from 84 to 86.5%. Shrimp fed a diet with 0% FM showed lower average weight and SGR compared to the other treatments (P<0.05). FCR of...
Tipo: Text Palavras-chave: Metabolism; Growth; Plant proteins; Substitution fish meal; L. vannamei.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6630.pdf
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Supplementation of extract of Lafoensia pacari in the diet of semi heavy laying hens Animal Sciences
Moreira, Janaina da Silva; Stringhini, José Henrique; Conceição, Edemilson Cardoso da; Arhnold, Emmanuel; Noleto, Raiana Almeida; Carvalho, Fabyola Barros de.
 It was intended to evaluate the supplementation of Lafoensia pacari standardized in tannins extract in the diet of laying hens on the performance, internal and external quality of eggs and metabolism of the feed nutrients. A total of 168 Isa Brown laying hens, aged 24 weeks, with the mean weight of 2.6 kg and the mean posture rate of 87% were used during 4 periods of 28 days each. The treatments consisted of Halquinol performance-enhancing antibiotic, Mannanoligosaccharide (MOS) prebiotic and three levels of pacari extract – 1,000, 2,000 and 3,000 mg kg-1of feed. The experimental design was completely randomized, with six treatments and seven replicates of four hens each. The pacari standardized in tannin extract presented a percentage of albumen and an...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.04.00.00-2; 5.04.03.00-1 egg production; Metabolism; Performance; Phytogenic additive..
Ano: 2017 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/32209
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Symmorphosis in the proximal pathway for oxygen in the leaf-eared mouse Phyllotis darwini Biol. Res.
CANALS,MAURICIO; FIGUEROA,DANIELA; SABAT,PABLO.
In this report, we explore the matching of structures to functional needs by comparing previously reported data of maximal oxygen consumption and the development of the lung in the leaf-eared mouse Phyllotis darwini in warm and cold environments. We discuss whether the state of structural design is commensurate with functional needs from regulated morphogenesis as predicted by the hypothesis of symmorphosis. We found a close match between respiratory structures and functional needs during postnatal development, expressed as safety factors close to unity. However, in the adult stage the safety factors were greater than two, which suggests that adult animals acquired a structure greater than that required considering their maximum capacities. A high safety...
Tipo: Journal article Palavras-chave: Metabolism; Ontogeny; Phyllotis darwini; Symmorphosis.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000100009
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Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensis Neotropical Ichthyology
Pereira,Jéssica A.; Veronez,Alexandra C.S.; Coppo,Gabriel C.; Duca,Charles; Chippari-Gomes,Adriana R.; Gomes,Levy C..
ABSTRACT Oxygen and temperature are the most limiting factors in aquatic environments. Several species are exposed to variations of these factors in water because of physical, chemical and biological processes. The objective of this study was to evaluate the metabolic profile and the tolerance to the hypoxia of Geophagus brasiliensis exposed to changes in temperature and oxygen availability. The fish were exposed to 20 and 90% of oxygen saturation combined with different temperatures (20°, 24° and 28° C) for 8 h. Hepatic and muscular glycogen, as well as the activities of lactate dehydrogenase (LDH), malate dehydrogenase (MDH), citrate synthase (CS) and their ratios were evaluated. Both glycogen and MDH activity showed a significant difference in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aerobic and anaerobic pathways; Behavior; Metabolism; Oxygen.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100202
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The metabolic status of diapause embryos of <i>Artemia franciscana</i> (SFB) OMA
Clegg, J.S.; Drinkwater, L.E.; Sorgeloos, P..
The brine shrimp <i><i>Artemia</i> franciscana</i> is widely used in aquaculture and basic research in areas ranging from molecular biology to evolution and ecology. A key of its life history involves the production of encysted embryos whose development is halted (enters diapause) at the gastrula stage. These shelled embryos are released into the aqueous environment where diapause continues until terminated by suitable conditions that produce an "activated embryo", which then can resume development when conditions permit. Very little is known about the metabolism of diapause embryos, in contrast to activated embryos, which have been studied extensively. We have examined selected features of metabolism in diapause embryos produced in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diapause; Embryos; Metabolism; Artemia franciscana.
Ano: 1996 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2924
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The planktonic stages of the salmon louse ( Lepeophtheirus salmonis) are tolerant of end-of-century p CO2 concentrations ArchiMer
Thompson, Cameron R.s.; Fields, David M.; Bjelland, Reidun M.; Chan, Vera Bin San; Durif, Caroline M.f.; Mount, Andrew; Runge, Jeffrey A.; Shema, Steven D.; Skiftesvik, Anne Berit; Browman, Howard I..
The copepod Lepeophtheirus salmonis is an obligate ectoparasite of salmonids. Salmon lice are major pests in salmon aquaculture and due to its economic impact Lepeoph- theirus salmonis is one of the most well studied species of marine parasite. However, there is limited understanding of how increased concentration of pCO2 associated with ocean acidification will impact host-parasite relationships. We investigated the effects of increased pCO2 on growth and metabolic rates in the planktonic stages, rearing L. salmonis from eggs to 12 days post hatch copepodids under three treatment levels: Control (416 matm), Mid (747 matm), and High (942 matm). The pCO2 treatment had a significant effect on oxygen consumption rate with the High treatment animals exhibiting...
Tipo: Text Palavras-chave: Salmon lice; Copepod; Ocean acidification; Parasite; Energetics; Metabolism; Growth; Lipid; Lepeophtheirus salmonis; Aquaculture.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00588/69998/67911.pdf
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Total and non-fibrous carbohydrates intake and digestibility of five forage sorghum silages harvested in a Brazilian semi-arid region. Repositório Alice
SANTOS, R. D. dos; GONÇALVES, L. C.; MACEDO, F. de A. F. de; QUEIROZ, L. de O.; NEVES, A. L. A.; PEREIRA, L. G. R.; SCHERER, C. B.; ARAUJO, G. G. L. de; MUNIZ, E. N.; OLIVEIRA, G. F..
Sorghum has potential to be used as a feed source for ruminants, especially in semi-arid regions, owing to its high resistance to drought and extreme temperatures factors that contribute to increase its yield for silage production as compared to traditional crops (i.e. corn) grown under arid conditions.
Tipo: Parte de livro Palavras-chave: Lambs; Metabolism; Nutrition; Ruminants.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1008794
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Transcriptomic analysis reveals specific metabolic pathways of enterohemorrhagic Escherichia coli O157:H7 in bovine digestive contents ArchiMer
Segura, Audrey; Bertoni, Marine; Auffret, Pauline; Klopp, Christophe; Bouchez, Olivier; Genthon, Clemence; Durand, Alexandra; Bertin, Yolande; Forano, Evelyne.
Background The cattle gastrointestinal tract (GIT) is the main enterohemorrhagic Escherichia coli (EHEC) reservoir. In order to identify nutrients required for the survival or multiplication of EHEC in the bovine GIT, we compared the transcriptomes of the EHEC O157:H7 reference strain EDL933 cultured in vitro in bovine digestive contents (DCs) (rumen, small intestine and rectum) using RNA-sequencing. Results Gene expression profiles showed that EHEC EDL933 activated common but also specific metabolic pathways to survive in the different bovine DCs. Mucus-derived carbohydrates seem important in EHEC nutrition in posterior DCs (small intestine and rectum) but not in rumen content. Additional carbohydrates (xylose, ribose, mannitol, galactitol) as well as...
Tipo: Text Palavras-chave: EHEC O157:H7; Bovine gastrointestinal tract; RNA-seq; Metabolism; Carbon sources; Mucus-derived carbohydrates; Ethanolamine; Respiration.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00464/57563/59734.pdf
Registros recuperados: 191
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