Consulta: subjectFacets:"Interactions"
Registros recuperados: 37
Data/hora: 06/06/2024 19:17:27

Eficiencia en el uso de nitrógeno en maíz.
Provedor de dados: 32
Autores: Alvarado Gómez, Luis Carlos.
El maíz ocupa a nivel mundial el tercer lugar en importancia después del trigo y el arroz. Este cultivo en México cubre una superficie anual aproximada de ocho millones de ha. El N como fertilizante es un elemento importante para lograr rendimientos satisfactorios, sin embargo, el uso indiscriminado de N ha traído cambios negativos en el ambiente, principalmente en la atmósfera, mantos acuíferos y sistemas lagunares, entre otros componentes de los ecosistemas, adicionalmente el alto costo energético hace necesario incrementar la eficiencia en el uso del N (EUN), una de las alternativas es el uso de variedades que absorban y metabolicen el N de manera más eficiente, El desarrollo de variedades mejoradas de maíces será mayor con el conocimiento de las bases...
Palavras-chave: Zea mays L.; Dosis de fertilización; Genotipos; Interacciones; Localidades; Fertilizer dosage; Genotypes; Interactions; Locations; Doctorado; Agroecosistemas Tropicales.
Ano: 2010
URL: http://hdl.handle.net/10521/432

Interactions Among Ecosystem Services Across Land Uses in a Floodplain Agroecosystem
Provedor de dados: 7
Autores: Bennett, Elena M.; Department of Natural Resource Sciences and McGill School of Environment, McGill University; elena.bennett@mcgill.ca.
Managing human-dominated landscapes such as agroecosystems is one of the main challenges facing society today. Decisions about land-use management in agroecosystems involve spatial and temporal trade-offs. The key scales at which these trades-offs occur are poorly understood for most systems, and quantitative assessments of the services provided by agroecosystems under different combinations of land uses are rare. To fill these knowledge gaps, we measured 12 ecosystem services (ES), including climate regulation, gas regulation, soil stability, nutrient regulation, habitat quality, raw material production, food production, fishing, sports, recreation, education, and social relationships, in seven common land-use types at three spatial scales, i.e., patch,...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agroecosystem; Ecosystem services; Floodplain; Interactions; Land uses; Spatial scales; Trade-offs.
Ano: 2014

Bacterial Dynamics in a Microphytobenthic Biofilm: a Tidal Mesocosm Approach
Provedor de dados: 5
Autores: Agogue, Helene; Mallet, Clarisse; Orvain, Francis; De Crignis, Margot; Mornet, Francoise; Dupuy, Christine.
In intertidal mudflats, during low tide exposure, microphytobenthos (MPB) migrate vertically through the surface sediment and form, with the heterotrophic bacteria, a transient biofilm. Inside this biofilm, multiple interactions exist between MPB and bacteria. These micro-organisms secrete a wide range of extracellular polymeric substances (EPS), which are major components of the biofilm matrix. In this study, we used a tidal mesocosm experiment in order to decipher the interactions of the MPB-EPS-bacteria complex within the biofilm. We tried to determine if the EPS could control bacterial activities and/or production and/or richness according to the age of the biofilm and to the immersion/emersion period. The dynamics of biomasses of MPB and prokaryotes,...
Tipo: Text
Palavras-chave: Muddy sediment; Microphytobenthos; Bacteria; Extracellular polymeric substances; Interactions; Mesocosm.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00181/29271/27682.pdf

Dual transcriptomics of virus-host interactions: comparing two Pacific oyster families presenting contrasted susceptibility to ostreid herpesvirus 1
Provedor de dados: 5
Autores: Segarra, Amelie; Mauduit, Florian; Faury, Nicole; Trancart, Suzanne; Degremont, Lionel; Tourbiez, Delphine; Haffner, Philippe; Barbosa-solomieu, Valerie; Pepin, Jean-francois; Travers, Marie-agnes; Renault, Tristan.
Background:  Massive mortality outbreaks affecting Pacific oyster (Crassostrea gigas) spat in various countries have been associated with the detection of a herpesvirus called ostreid herpesvirus type 1 (OsHV-1). However, few studies have been performed to understand and follow viral gene expression, as it has been done in vertebrate herpesviruses. In this work, experimental infection trials of C. gigas spat with OsHV-1 were conducted in order to test the susceptibility of several bi-parental oyster families to this virus and to analyze host-pathogen interactions using in vivo transcriptomic approaches.  Results:  The divergent response of these oyster families in terms of mortality confirmed that susceptibility to OsHV-1 infection has a significant...
Tipo: Text
Palavras-chave: Interactions; Ostreid herpesvirus 1; Gene expression; Susceptibility; Crassostrea gigas.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00199/31029/29431.pdf

Effects of nitrogen limitation on Dunaliella sp.–Alteromonas sp. interactions: from mutualistic to competitive relationships.
Provedor de dados: 5
Autores: Le Chevanton, Myriam; Garnier, Matthieu; Lukomska, Ewa; Schreiber, Nathalie; Cadoret, Jean-paul; Saint-jean, Bruno; Bougaran, Gael.
Interactions between photosynthetic and non-photosynthetic microorganisms play an essential role in natural aquatic environments and the contribution of bacteria and microalgae to the nitrogen cycle can lead to both competitive and mutualistic relationships. Nitrogen is considered to be, with phosphorus and iron, one of the main limiting nutrients for primary production in the oceans and its availability experiences large temporal and geographical variations. For these reasons, it is important to understand how competitive and mutualistic interactions between photosynthetic and heterotrophic microorganisms are impacted by nitrogen limitation. In a previous study performed in batch cultures, the addition of a selected bacterial strain of Alteromonas sp....
Tipo: Text
Palavras-chave: Interactions; Nitrogen limitation; Microalgae; Bacteria; Chemostat; Dissolved organic matter (DOM); Dunaliella.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00344/45529/45087.pdf

Uptake of dissolved inorganic and organic nitrogen by the benthic toxic dinoflagellate Ostreopsis cf. ovata
Provedor de dados: 5
Autores: Jauzein, Cecile; Couet, Douglas; Blasco, Thierry; Lemee, Rodolphe.
Environmental factors that shape dynamics of benthic toxic blooms are largely unknown. In particular, for the toxic dinoflagellate Ostreopsis cf. ovata, the importance of the availability of nutrients and the contribution of the inorganic and organic pools to growth need to be quantified in marine coastal environments. The present study aimed at characterizing N-uptake of dissolved inorganic and organic sources by O. cf. ovata cells, using the 15N-labelling technique. Experiments were conducted taking into account potential interactions between nutrient uptake systems as well as variations with the diel cycle. Uptake abilities of O. cf. ovata were parameterized for ammonium (NH4+), nitrate (NO3−) and N-urea, from the estimation of kinetic and inhibition...
Tipo: Text
Palavras-chave: Uptake; Nitrogen; Dinoflagellate; Ostreopsis; Kinetics; Interactions.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00382/49368/49840.pdf

Étude numérique et expérimentale du comportement d’hydroliennes
Provedor de dados: 5
Autores: Mycek, Paul.
This manuscript deals with the numerical and experimental characterisation of the behaviour of marine current turbines. In the experimental part, trials were run at IFREMER’s wave and current flume tank in Boulogne-Sur-Mer, on prototypes of three-bladed horizontal axis turbines. Configurations with one single turbine on the one hand, and two turbines aligned with the incoming flow on the other hand, were considered for a large range of TSRs and, when relevant, of inter-device distances. The behaviour of the turbines is analysed in terms of performances (power and thrust coefficients) and development of the wake. The effects of the ambient turbulence intensity rate are also considered. Besides, numerical computations, obtained from a tridimensional unsteady...
Tipo: Text
Palavras-chave: Hydroliennes; Interactions; Essais expérimentaux; Simulation numérique; Méthode particulaire; Méthode Vortex.; Marine current turbines; Interactions; Experimental trials; Numerical computation; Particle method; Vortex method.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00170/28152/26382.pdf

Les ADN polymérases B et D de l'Archaea hyperthermophile, Pyrococcus abyssi : contribution à l'étude des relations structure-fonction
Provedor de dados: 5
Autores: Castrec, Benoit.
DNA replication is a functionally conserved mechanism among the three domains of life. This processus is performed by DNA polymerases with two accessories factors, PCNA and RF-C, sliding clamp and clamp loader, respectively. Our model of study, the Euryarchaeota Pyrococcus abyssi, possesses one monomeric DNA polymerase, belonging to the Family B, and one heterodimeric DNA polymerase, belonging to the Family D. Usually, proteins interact with PCNA at a hydrophobic pocket which is formed by the IDCL (interdomain connecting loop) and the C-terminus. These interactions are mediated through common motifs like the PIP box (motif PCNA interacting Protein). We have demonstrated that Pol B has just one PIP box motif at the C-terminus, while Pol D has two PIP-type...
Tipo: Text
Palavras-chave: Thermostability; Interactions; Motifs; DNA replication; RF C; PCNA; DNA polymerases; Archaea; Thermostabilité; Interactions; Motifs; Réplication de l'ADN; RF C; PCNA; ADN polymérases; Archaea.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/these-6940.pdf

Comparative Proteomics of Ostreid Herpesvirus 1 and Pacific Oyster Interactions With Two Families Exhibiting Contrasted Susceptibility to Viral Infection
Provedor de dados: 5
Autores: Leprêtre, Maxime; Faury, Nicole; Segarra, Amelie; Claverol, Stéphane; Degremont, Lionel; Palos-ladeiro, Mélissa; Armengaud, Jean; Renault, Tristan; Morga, Benjamin.
Massive mortality outbreaks affecting Pacific oysters (Crassostrea gigas) spat/juveniles are often associated with the detection of a herpesvirus called ostreid herpesvirus type 1 (OsHV-1). In this work, experimental infection trials of C. gigas spat with OsHV-1 were conducted using two contrasted Pacific oyster families for their susceptibility to viral infection. Live oysters were sampled at 12, 26, and 144 h post infection (hpi) to analyze host-pathogen interactions using comparative proteomics. Shotgun proteomics allowed the detection of seven viral proteins in infected oysters, some of them with potential immunomodulatoy functions. Viral proteins were mainly detected in susceptible oysters sampled at 26 hpi, which correlates with the mortality and...
Tipo: Text
Palavras-chave: Proteomics; Interactions; Antiviral response; OsHV-1; Pacific oysters.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00669/78075/80307.pdf

Coastal phytoplankton community dynamics and coexistence driven by intragroup density-dependence, light and hydrodynamics
Provedor de dados: 5
Autores: Barraquand, F.; Picoche, C.; Maurer, Daniele; Carassou, L.; Auby, Isabelle.
Phytoplanktonic communities maintain a high diversity in a seemingly homogeneous environment, competing for the same set of resources. Many theories have been proposed to explain this coexistence despite likely competition, such as contrasted responses to temporal environmental variation. However, theory has developed at a faster pace than empirical evaluation using field data, which requires inferring drivers of community dynamics from observational time series. Here, we combine autoregressive models with a data set spanning more than 20 years of phytoplankton counts every two weeks, together with nutrients and physical variables. By comparing models dominated by nutrients or physical variables (hydrodynamics and climate), we first explore which abiotic...
Tipo: Text
Palavras-chave: Competition; Diatoms; Dinoflagellates; Hydrodynamics; Interactions; MAR; Mutualism; Network; Population dynamics; Seasonality; Time series.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00461/57257/59285.pdf

The emergence of Vibrio pathogens in Europe: ecology, evolution, and pathogenesis (Paris, 11-12th March 2015)
Provedor de dados: 5
Autores: Le Roux, Frederique; Wegner, K. Mathias; Baker-austin, Craig; Vezzulli, Luigi; Osorio, Carlos R.; Amaro, Carmen; Ritchie, Jennifer M.; Defoirdt, Tom; Destoumieux-garzon, Delphine; Blokesch, Melanie; Mazel, Didier; Jacq, Annick; Cava, Felipe; Gram, Lone; Wendling, Carolin C.; Strauch, Eckhard; Kirschner, Alexander; Huehn, Stephan.
Global change has caused a worldwide increase in reports of Vibrio-associated diseases with ecosystem-wide impacts on humans and marine animals. In Europe, higher prevalence of human infections followed regional climatic trends with outbreaks occurring during episodes of unusually warm weather. Similar patterns were also observed in Vibrio-associated diseases affecting marine organisms such as fish, bivalves and corals. Basic knowledge is still lacking on the ecology and evolutionary biology of these bacteria as well as on their virulence mechanisms. Current limitations in experimental systems to study infection and the lack of diagnostic tools still prevent a better understanding of Vibrio emergence. A major challenge is to foster cooperation between...
Tipo: Text
Palavras-chave: Global warming; Human health; Aquaculture; Interactions; Animal model; Bacterial disease; Genome plasticity; European network.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00278/38952/37494.pdf

Ecological and biological factors controlling the concentrations of trace elements (As, Cd, Cu, Hg, Se, Zn) in delphinids Globicephala melas from the North Atlantic Ocean
Provedor de dados: 5
Autores: Caurant, Florence; Amiard, Jean-claude; Amiard-triquet, Claude; Sauriau, Pierre-guy.
Trace elements (As, Cd, Cu, Hg, Se and Zn) were determined in liver and kidney of pilot whales Globicephala melas Traill, 1809 collected from 7 schools caught at different seasons around the Faroe Islands. These and other biological data at our disposal enabled us to confirm and to define more accurately the relations shown previously between age, sex and trace element concentrations in marine mammals. The most striking features were: (1) the elevated levels of Cd and Hg in pilot whales compared to other marine mammals and to minimum adverse-effect levels established for humans; (2) the biocumulative behaviour of Cd and Hg; (3) the high correlations between Hg and Se, predominantly influenced by age; and (4) the high correlations between Cd and Zn, the...
Tipo: Text
Palavras-chave: Marine mammals; Heavy metals; Interactions.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00196/30766/29149.pdf

Interactions microalgues-bactéries en système expérimental bispécifique : effets sur la croissance de Dunaliella sp.
Provedor de dados: 5
Autores: Le Chevanton, Myriam.
The use of algae-bacteria mixed culture has been suggested to improve performance of industrial microalgae culture. The present study aims to investigate impact of selected bacteria on Dunaliella sp. growth. 97 bacteria strains were isolated from a variety of marine microalgae cultures. The diversity of strains revealed members of α-and γ-proteobacteria, Cytophaga-Flavobacterium-Bacteroides and grampositive. A two-phase approach was then implemented to select bacteria that improve Dunaliella sp. growth, using an original high-throughput experimental device. Although a majority of bacteria induced performance reduction for Dunaliella sp., some resulted in significant improvements. In nitrogenlimited batch culture, the Alteromonas sp. bacteria demonstrated a...
Tipo: Text
Palavras-chave: Interactions; Microalgues; Bactéries; Dunaliella; Axénie; Interactions; Microalgae; Bacteria; Dunaliella; Axenic.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00187/29839/28291.pdf

La flottille artisanale française de Manche Ouest. Bilan des connaissances
Provedor de dados: 5
Autores: Morizur, Yvon; Berthou, Patrick; Latrouite, Daniel; Veron, Gerard.
A survey made during 1986-1987 on the artisanal fleet of the artisanal fleet in Northern Brittany and Western part of Cotentin allowed to describe this fleet in term of activity and metiers. Catches are given by species and by type of fishing activity. The result permit to outline interactions between the various activities and exploited resources. A summary of knowledge on exploited species is given.
Tipo: Text
Palavras-chave: Flottille; Métiers; Typologie; Interactions; Expèces exploitées; Manche; Fleet; Metiers; Interactions; Exploited species; Channel.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00422/53390/54252.pdf

Prise simultanee de quatre sources d'azote par le microphytobenthos du chenal de Lauzieres (Charente Maritime-France) en ete
Provedor de dados: 5
Autores: Collos, Y.
Simultaneous uptake of nitrate, nitrite, ammonium and urea by microphytobenthos incubated in batch mode immediately after sampling do not show any kind of interactions. A linear relationship is found between nitrate uptake and ammonium uptake, the latter values being about 2 to 3 times higher than former. Ammonium uptake was not saturated by a substrate level of 10 mu M, possibly indicating diffusion limited uptake. For all nitrogen sources, the uptake rate was related to the substrate concentration rather than the oxidation state of the nitrogen compounds.
Tipo: Text
Palavras-chave: Pond culture; Interactions; Nitrogen compounds; Phytobenthos; Food conversion; Urea; Ammonium compounds; Nitrites; Nitrates.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1532.pdf

La pêche de loisir dans le golfe du Morbihan
Provedor de dados: 5
Autores: Boude, Jp; Lesueur, M; Daures, Fabienne; Guyader, Olivier; Drouot, Bruno.
Leisure fishing, open to everyone and without a license, is a leisure activity in which many people are interested. Conversely to other harvesting activities such as fresh water fishing and hunting, it has practically not been studied until now (Appéré et Bonnieux, 2002). This study, dedicated to practice of leisure fishing at sea in the Gulf of Morbihan, set itself several objectives: - collect and assemble the available knowledge on regulations and practice of maritime leisure fishing - assess the amount of harvesting of certain recreational types of fishing and the economic impact generated by this activity, - highlight the problems of existing or potential cohabitations among the various users of the space and resources in the Gulf. - develop an...
Tipo: Text
Palavras-chave: Economic evaluation; Shellfish; Clams; Morbihan bay; Brittany; Leisure fishing; Cout de transport; Palourdes; Interactions; Conflits d'usage; Evaluation economique; Impact sur la ressource; Reglementation; Peche en bateau; Peche de plaisance; Peche à pied; Peche de loisir; Activités de peche; Golfe du morbihan.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2244.pdf

Interactions between ammonium and urea uptake by five strains of Alexandrium catenella (Dinophyceae) in culture
Provedor de dados: 5
Autores: Jauzein, Cecile; Loureiro, Sofia; Garces, Esther; Collos, Yves.
Short-term experiments were carried out to investigate whether interactions between ammonium (NH4+) and urea uptake regulate the total nitrogen assimilation of the toxic dinoflagellate Alexandrium catenella. To test for strain variability, 5 strains of A. catenella from the NW Mediterranean were used: 3 strains from the Thau lagoon (southern France) and 2 strains from the Catalonia basin (Spain). For each strain, the uptake rate of 1 nutrient (NH4+ or urea) at a reference concentration (10 mu gatN l(-1)) was measured as a function of the increasing concentration of the other nutrient (0 to 10 mu gatN l(-1)). Simultaneous N uptake rates of the distinct nitrogen sources were obtained from N-15-NH4+ and N-15-urea incorporation measurements. A strong...
Tipo: Text
Palavras-chave: Strain variability; Interactions; Urea; Ammonium; Alexandrium catenella.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6432.pdf

The influence of natural dissolved organic matter on herbicide toxicity to marine microalgae is species-dependent
Provedor de dados: 5
Autores: Coquille, Nathalie; Menard, Dominique; Rouxel, Julien; Dupraz, Valentin; Eon, Melissa; Pardon, Patrick; Budzinski, Helene; Morin, Soizic; Parlanti, Edith; Stachowski-haberkorn, Sabine.
Microalgae, which are the foundation of aquatic food webs, may be the indirect target of herbicides used for agricultural and urban applications. Microalgae also interact with other compounds from their environment, such as natural dissolved organic matter (DOM), which can itself interact with herbicides. This study aimed to evaluate the influence of natural DOM on the toxicity of three herbicides (diuron, irgarol and S-metolachlor), singly and in ternary mixtures, to two marine microalgae, Chaetoceros calcitrans and Tetraselmis suecica, in monospecific, non-axenic cultures. Effects on growth, photosynthetic efficiency (Ф’M) and relative lipid content were evaluated. The chemical environment (herbicide and nutrient concentrations, dissolved organic carbon...
Tipo: Text
Palavras-chave: Microalgae; Herbicides; Natural dissolved organic matter; DOM; Toxicity; Interactions.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00428/53964/55113.pdf

Study of the interaction of fish myosin with the products of lipid oxidation: The case of aldehydes
Provedor de dados: 5
Autores: Chopin, Christine; Kone, Matenin; Serot, Thierry.
The aim of this study was to assess the modifications of fish myosin induced by interactions with four aldehydes: hexanal, 2-hexenal, 2,4-hexadienal, and 2,6-nonadienal. These compounds are generated during lipid oxidation and are known to have an impact on the functional properties of proteins.  The interactions between protein and aldehydes were highlighted by measuring the content of aldehydes in the gaseous phase by the SPME-GC technique. Results show that the partition of aldehydes between the proteinaceous system and the gas phase decreases with time, except for hexanal. This decrease is proportional to the number of carbons and double bonds.  The reaction between myosin and unsaturated aldehydes induces a decrease in the free sulfhydryl and amino...
Tipo: Text
Palavras-chave: SPME; Interactions; Aldehydes; Fish myosin.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2676.pdf

Interacciones entre corales y macroalgas: dependencia de las especies involucradas
Provedor de dados: 20
Autores: Márquez, J.C.; Díaz, J.M.
Macroalgae proliferation on coral reefs has been a recognized phenomenon for the past two decades and is generally entitled to the human activities on the coasts. Even thought, the role of competition in this process is not clear and it has been assumed that algae are competitively superior to corals, even when it has been demonstrated that this is not always the case. It is probable that the result of coral-macroalgae depends upon the species involved. The goal of this study was to demonstrate that there is a dependence relation between interaction category and interacting species. In order to resolve this, quantifications of interactions per category along 20 m transects were done on three representative localities at the Archipielago de San Bernardo....
Tipo: Journal Contribution
Palavras-chave: Coral; Interactions; Competition; Benthos; Benthos; Http://aims.fao.org/aos/agrovoc/c_878.
Ano: 2005
URL: http://hdl.handle.net/1834/2013

Interaction entre les activités de pêche dans le golfe de Gabès
Provedor de dados: 20
Autores: Jabeur, Ch.; Missaoui, H.
Les activités de pêche dans le Golfe de Gabès sont diverses et sont rarement monospécifiques, plusieurs espèces sont pêchées par un même engin (cas du chalutage) et une même espèce est exploitée par plusieurs engins et donc par plusieurs métiers (chalutage et pêche côtière). Les interactions qui existent entre ces métiers sont fortes et sont essentiellement de type compétition sur les ressources et l’espace. Les relations de complémentarité et de substitution sont rares.
Tipo: Journal Contribution
Palavras-chave: Catching methods; Marine fisheries; Fishing; Interactions; Fishing gear.
Ano: 2000
URL: http://hdl.handle.net/1834/4293

Evaluation des intercations entre les dauphins et les filets de pêche des sardiniers de la région de Mahdia et réduction de leur impact par l'utilisation des ondes acoustiques générées par le "tube dauphin".
Provedor de dados: 20
Autores: Ben Naceur, L.; Bdioui, M.; M'rabet, R.
ن ارتفاع تكلفة صيانة الشباك الدائرة و العينية جراء هجمات الدلافين،يؤثر كثيرا علي مرد ودية وحدات الصيد. و للحد من هذه الهجمات، ابتكر المعهد الوطني لعلوم وتكنلوجيا البحار آلة ميكانيكية سميت "انبوب الدلفين"، تبعث عند طرقها، ذبذبات صوتية قادرة علي إجبار الدلافين علي مغادرة مكان تواجد شباك الصيد . بعد مدة استعمال ناجحة نسبيا طفت المشكلة علي الساحة من جديد وبأكثر حدة. لهذا الغرض أنجز برنامج عمل، مكن من تقييم التفاعل بين الدلافين والشباك الدائرة لصيد الأسماك الصغيرة العائمة بجهة المهدية ومن إدخال بعض التحسينات علي "أنبوب الدلفين" الذي أثبتت التجارب الميدانية بأنه أصبح قادرا علي تشويش جهاز الرصد عند الدلافين مع بعث حدة صوتية لا يتحملها الجهاز الحسي السمعي لهذا الحيوان.
Tipo: Journal Contribution
Palavras-chave: Gillnets; Gear research; Interactions; Interactions; Marine mammals; Pelagic fisheries; Seine nets; Sound waves; Gillnets; Sound waves; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_32431; Http://aims.fao.org/aos/agrovoc/c_29057; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 2007
URL: http://hdl.handle.net/1834/4282

L'interaction hôte-parasite en aquaculture : cas du charax, diplodus puntazzo (pisces, sparidae)  infesté par myxidium leei (myxozoa)
Provedor de dados: 20
Autores: Tarer, V.; Marques, A.; Raymond, J. Ch.
Un échantillonnage de poissons parasités (Diplodus puntazzo) en provenance d’une firme aquacole située au Sud-est de la Corse (Ouest méditerranéen) montre une infestation due à un Myxidium leei. Le parasite envahit l’épithélium intestinal causant amaigrissement du poisson et une forte mortalité. Les spécimens de plus de 16 cm de longueur totale étaient significativement moins infestés. Toutefois, l’infestation ne montre pas de différence significative entre mâles et femelles quelle que soit la taille des spécimens. Quelques paramètres hématologiques ont été utilisés pour montrer le rôle du parasite dans cette maladie de poissons et statuer sur l’interaction hôte-parasite.
Tipo: Journal Contribution
Palavras-chave: Fish diseases; Interactions; Parasitic diseases; Hosts; Aquaculture; Parasitism; Fish culture.
Ano: 2000
URL: http://hdl.handle.net/1834/4291

Dinámica de las interacciones algal-coral en dos Bahías de la región de Santa Marta (caribe colombiano) con distinto grado de influencia antropogénica
Provedor de dados: 20
Autores: Mejía N., N.; Garzón-Ferreira, J.
As a contribution to understanding the potential impact of macroalgae on coral communities, this work evaluated the presence and dynamics of algae-coral interactions in two bays of the Santa Marta region. Two stations were sampled in Chengue Bay, located within the Tayrona Natural Park, and two other in the Santa Marta Bay which is adjacent to the city of Santa Marta. Three permanent 10 m belt transects were settled at each station, at which a total of 270 coral colonies were monitored monthly. Algae - coral interactions were recorded from each colony based on five categories defined by the distance between the coral tissue and the algal mat. A total of 1956 interactions were recorded, 67% of which corresponded to direct contacts, 22% to indirect contacts,...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Algae; Interactions; Coral reefs; Algae; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_258.
Ano: 2003
URL: http://hdl.handle.net/1834/3190

How to use the Reductionist approach for evaluating subsystems to research the elements of the development
Provedor de dados: 31
Autores: Goda,   Pal; Toth,   Tamas; Kollar,   Kitti.
Reductionist approach for evaluating subsystems
Tipo: Journal Article
Palavras-chave: System; Sub-system; Interactions; Components general spider map theory; Local community; Network entropy; Social physics; Agribusiness; Community/Rural/Urban Development.
Ano: 2008
URL: http://purl.umn.edu/47545

Visualizing main effects and interactions for binary logit models
Provedor de dados: 31
Autores: Mitchell,   Michael N.; Chen,   Xiao.
This paper considers the role of covariates when using predicted probabilities to interpret main effects and interactions in logit models. While predicted probabilities are very intuitive for interpreting main effects and interactions, the pattern of results depends on the contribution of covariates. We introduce a concept called the covariate contribution, which reflects the aggregate contribution of all of the remaining predictors (covariates) in the model and a family of tools to help visualize the relationship between predictors and the predicted probabilities across a variety of covariate contributions. We believe this strategy and the accompanying tools can help researchers who wish to use predicted probabilities as an interpretive framework for...
Tipo: Journal Article
Palavras-chave: Logistic regression; Predicted probabilities; Main effects; Interactions; Covariate contribution; Research Methods/ Statistical Methods.
Ano: 2005
URL: http://purl.umn.edu/117500

IDENTIFYING CONSUMER VALUATION PATTERNS OF ALTERNATIVE NUTRITION AND HEALTH LABELS COMBINATIONS: EVIDENCE FROM SPAIN
Provedor de dados: 31
Autores: Barreiro-Hurlé,   Jesús; Gracia,   Azucena; de Magistris,   Tiziana.
The provision of nutrition and health information on food labels is increasing as an industry and regulation answer to the growing consumer concern with diet-health relationships. Prior research has shown that the presence of this information on food labels is valued by consumers; however there is still no clear pattern on which labelling options are more valued and how different consumers value the different options. This paper analyses the results of a choice experiment conducted to identify the effect of multiple health and nutrition information sources on consumer food choice, taking into account preference heterogeneity using a latent class approach. Results show that different consumer groups can be identified with clearly distinguishable valuation...
Tipo: Conference Paper or Presentation
Palavras-chave: Nutrition facts panel; Latent class; Choice experiments; Consumer; Interactions; Health claims; Nutrition claims; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety; Health Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/53338

Does disturbance determines the prevalence of dwarf mistletoe (Arceuthobium, Santalales: Viscaceae) in Central Mexico?
Provedor de dados: 97
Autores: QUEIJEIRO-BOLAÑOS,MÓNICA E; CANO-SANTANA,ZENÓN; CASTELLANOS-VARGAS,IVÁN.
Large vegetation disturbance rates have been reported in the "Zoquiapan y Anexas" Protected Natural Area in Central Mexico. Arceuthobium globosum and A. vaginatum coexist within this area and have a deleterious impact on Pinus hartwegii. This study seeks to understand the relationship between this disturbance and the two dwarf mistletoe species prevalent in this zone. Twenty-four plots measuring 60 x55 m containing P. hartwegii trees were selected. Within these plots, the physical features of the land, the density of host and non-host trees, the prevalence of each mistletoe species, and six disturbance indicators were recorded. We found that A. vaginatum infests up to 47 % of P hartwegii trees and that its prevalence is affected positively by the slope,...
Tipo: Journal article
Palavras-chave: Disturbance indicators; Interactions; Logging; Parasitic plants; Pinus hartwegii.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000200007

Assessment of health risks and local intervention associated to living together with dogs and cats, developed at Jardim Parana, district of Brasilandia. São Paulo, Sp,- Brazil, 2003
Provedor de dados: 195
Autores: Gomes, Luciana Hardt; de Almeida, Marilene Fernandes; Paranhos, Noêmia Tucunduva; Garcia, Rita de Cássia; Nunes, Vânia de Fátima Plaza; Montenegro Neto, Hildebrando; Cardoso, Sônia Maria Sodré.
Objective: To carry out a situational diagnosis of interactions among man, animal and environment, to test intervention and control model in dogs and cats and lo make local population aware in order to improve human and animal health. Material and Method: The project "Evaluation of risks to the heath and local intervention associated to living together with dogs and cats" was carried out in the area invaded in Jardim Paraná, District of Brasilândia, São PauLo city, Brazil, in 2003 by the Center of Zoonosis Control of the São Paulo Municipality. Animal census, vaccinations, treatment of ectoparasitosis and endoparasitosis, animal register, animal sterilization, serological and soil examinations and removal of animals was carried through. Forty seven percent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zoonoses; Community health; Local planning; Animal health; Environment; Risk factors; Human; Animal; Interactions; Intervention; Population control; Sterilization; Dogs; Cats Zoonosis; Planificación en salud comunitaria; Estrategias locales; Salud animal; Medio ambiente y salud publica; Factores de riesgo; Hombres; Animales; Vínculo ser humano-animal; Estudios de intervención; Regulación de la población zoonoses; Planejamento em saúde comunitária; Estratégias locais; Saúde animal; Meio ambiente e saúde pública; Fatores de risco; Homens; Animais; Vínculo homem-animal; Estudos de intervenção; Controle da população; Esterilização reprodutiva; Cães; Gatos.
Ano: 2003
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3262

Arthropods obtained from the Amazonian tree species "Cupiuba" (Goupia glabra) by repeated canopy fogging with natural Pyrethrum
Provedor de dados: 36
Autores: ADIS,Joachim; HARADA,Ana Yoshi; FONSECA,Claudio Ruy V. da; PAARMANN,Wilfried; RAFAEL,José Albertino.
Two canopies of a widely distributed Amazonian tree species, Goupia glabra Aubl. (Celastraceae, height 38 and 45m) were fogged several times with 1% natural pyrethrum during the rainy and dry seasons (1991-1994) in the Adolpho Ducke Forest Reserve near Manaus/Brazil. Between 50 and 158 ind./m2 of arthropods were obtained per tree and fogging event. Hymenoptera, mostly Formicidae, and Diptcra dominated. A total of 95 ant species occurred on a single tree. Most ants were permanently foraging in the canopy and their recolonization after fogging seems to follow stochastic pathways. Data indicated an interaction between - 1) predating Formicidae and gall building Cecidomyiidae and - 2) Cecidomyiidae and the parasitic Hymenoptera.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Canopy fogging; Pyrethrum; Arthropods; Recolonization; Interactions; Amazon; Neotropics.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671998000300273

Interactions between cationic liposomes and drugs or biomolecules
Provedor de dados: 42
Autores: CARMONA-RIBEIRO,ANA MARIA.
Multiple uses for synthetic cationic liposomes composed of dioctadecyldimethylammonium bromide (DODAB) bilayer vesicles are presented. Drugs or biomolecules can be solubilized or incorporated in the cationic bilayers. The cationic liposomes themselves can act as antimicrobial agents causing death of bacteria and fungi at concentrations that barely affect mammalian cells in culture. Silica particles or polystyrene microspheres can be functionalized by coverage with DODAB bilayers or phospholipid monolayers. Negatively charged antigenic proteins can be carried by the cationic liposomes which generate a remarkable immunoadjuvant action. Nucleotides or DNA can be physically adsorbed to the cationic liposomes to be transferred to mammalian cells for gene...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Interactions; Dioctadecyldimethylammonium bromide; Phospholipids; Liposomes; Drugs; Surfaces.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652000000100005

Community structure of turf algae in interactions with massive corals in Tayrona National Natural Park, Colombian Caribbean
Provedor de dados: 50
Autores: Gómez-Cubillos,Catalina; Gavio,Brigitte; Zea,Sven.
ABSTRACT Algal turfs are currently the most abundant benthic component on most coral reefs. Their wide distribution, functional role and positive response to factors that stress corals confirm their importance in the functioning of reef ecosystem. It has been shown that species composition, structural development and sediment retention influence their capacity to kill and displace adjacent live coral tissue. In this study in two reefs of the Tayrona National Natural Park (Colombian Caribbean), the variation in structure of turfs growing on and in direct interaction with massive live corals was determined, and its structural complexity was related with its sediment retention capacity. For that, the taxonomical composition was determined, and canopy height,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coral reefs; Algal turfs; Interactions; Structure of algal assemblages; Sediment retention; Colombian Caribbean.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612020000300045

Effect of mannitol on the pharmacokinetics of amikacin in wistar rats
Provedor de dados: 52
Autores: Olguín,Hugo Juárez; Portugal,Miriam Carrasco; Pérez,Janett Flores; Vieyra,Angélica Camacho; Pérez,Carmen Flores; Rodríguez,Alfonso Alfaro.
The study analyzed the effect of mannitol on the pharmacokinetics (PK) of amikacin. Adult Wistar rats were treated as follows: Group 1 (G1) received mannitol for three days, Group 2 (G2) received mannitol plus 10 mg/kg of amikacin simultaneously, and Group 3 only amikacin. The PK study was conducted on the 4th day. For which, blood samples were drawn at fixed times during 24 h and immunoenzymatically analyzed. Results revealed significant differences (p&lt;0.05) between the groups, e.g. Cmax were 62.26 ± 15.75 µg/ml for G1, 72.63 ± 24.80 µg/ml for G2 and 68.61 ± 27.40 µg/ml for G3. The AUC also differed in the three groups, being largest for G2, 222.52 ± 47.30 µg/ml/h, and smallest for G1, 135.59 ± 39.00 µg/ml/h. Alteration of the PK parameters observed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pharmacokinetics; Interactions; Amikacin; Mannitol; Antibiotics; Diuretics.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400006

Antinociceptive activity of Thyme (Thymus vulgaris L.) and interactions with neurotropics and analgesics
Provedor de dados: 60
Autores: Rašković,Aleksandar Lazar; Kvrgić,Maja Petar; Tomas,Ana Drago; Stilinović,Nebojša Petar; Čabarkapa,Velibor Spasoje; Stojšić-Milosavljević,Anastazija Ðurica; Kusturica,Milica Nada Paut; Rakić,Dušica Branko.
The plant world represents an important source of potential therapeutic agents, but concomitant administration of herbal and conventional medications may result in interactions with subsequent beneficial or adverse effects. This study was designed to examine the analgesic effect of thyme tincture and thyme syrup, two commonly used thyme formulations, and their interactions with codeine, paracetamol, pentobarbital and diazepam in mice. The identification and quantification of thymol and carvacrol were carried out by GC/MS and GC/FID. The analgesic activity was studied using a hot plate method. Effects of thyme syrup on diazepam-induced motor coordination impairment in rotarod test and on pentobarbital-induced sleeping time were also determined. Thymol...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thymus vulgaris; Hot plate; Analgesic; Interactions; Pentobarbital; Diazepam.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100634

Interrelationships between Grain Nitrogen Content and other Indicators of Nitrogen Accumulation and Utilization Efficiency in Wheat Plants
Provedor de dados: 117
Autores: Nikolic,Olivera; Zivanovic,Tomislav; Jelic,Miodrag; Djalovic,Ivica.
The topic of N wheat nutrition was prevalent during the last decades of the 20th century for many reasons such as energy crises, profitability of small grain production, and ecosystem protection and preservation. The objective of this study was to determine the interrelationships between wheat (Triticum aestivum L.) grain N content and other indicators of N nutrition efficiency to better understand the N nutrition process in wheat plants. The experiment included 30 wheat cultivars and experimental lines from Serbia. Plant samples of each genotype were taken at anthesis and maturity. The following parameters related to N accumulation and translocation within the wheat plant were calculated: N content (at anthesis, grain, straw, and total at maturity), N...
Tipo: Journal article
Palavras-chave: Interactions; Nitrogen nutrition; Path coefficients.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100018

Fusarium oxysporum dispersion by larvae of Cyclocephala modesta, Dyscinetus gagates and Diloboderus abderus in Brazil
Provedor de dados: 65
Autores: Salgado-Neto,Geraldo; Vaz,Marcos André Braz; Guedes,Jerson Vanderlei Carús; Muniz,Marlove Fátima Brião; Blume,Elena.
ABSTRACT: The scientific and economic importance of soybean root rot justifies the study of this disease, especially the role of insects as dispersers in the spread of root pathogens. The objective was to identify and evaluate qualitatively and quantitatively the role of Cyclocephala modesta, Dyscinetus gagatesand  Diloboderus abderus(Coleoptera: Melolonthidae) in the dispersion of root pathogens in cultivated fields. The fungi were identified to the species level with DNA extraction and sequencing of these organisms within Melolonthidae larvae. Larvae were dissected and separated into the parts: mouth parts, prothorax, cuticle and digestive tract (alimentary canal). The Internal Transcribed Spacer region of the rRNA was amplified and compared to sequences...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological control; Dissemination; Fusarium oxysporum; Interactions; Melolonthidae; White grubs.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000600943

Mixed and monospecific stands of eucalyptus and black-wattle: I - fine root length density
Provedor de dados: 65
Autores: Viera,Márcio; Schumacher,Mauro Valdir; Liberalesso,Edenilson.
Fine root length density (FRLD) was evaluated in mixed and monospecific stands of Eucalyptus grandis x E. urophylla and Acacia mearnsii in Southern Brazil. FRLD (≤2,0mm) at 8 and 18 months after planting in the treatments: 100E (100% of eucalyptus); 100A (100% of Acacia mearnsii); 50E:50A (50% of eucalyptus + 50% of Acacia mearnsii). The findings demonstrated that the FRLD at 8 months of age have the same distribution, in the two different species, in the distribution of the different soil layers, reaching the maximum projection of 125cm from the tree trunk. For the age of 18 months after planting, it was verified that the FRLD in the monospecific stand of Acacia mearnsii was higher than in the monoculture and mixed stand of Eucalyptus grandis x E....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fine root length density; Eucalyptus grandis x E. urophylla; Acacia mearnsii; Mixed-species Eucalyptus plantations; Interactions.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012001000016