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Registros recuperados: 49
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A method for the rapid determination of chlorophyll plus phaeopigments in samples collected by merchant ships IRD
Dandonneau, Yves.
Tipo: Text Palavras-chave: METHODE D'ANALYSE; ANALYSE QUANTITATIVE; CHLOROPHYLLE; FLUORESCENCE; COEFFICIENT DE CORRELATION; NAVIRE DE PECHE; PHAEOPIGMENT; FILTRATION; FLUORIMETRE.
Ano: 1982 URL: http://www.documentation.ird.fr/hor/fdi:02215
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A pulse-amplitude modulated fluorescence-based method for assessing the effects of photosystem II herbicides on freshwater periphyton Inra
Dorigo, U.; Leboulanger, C..
A test was developed that measures in vivo chlorophyll a fluorescence variables to assess the apparent sensitivity of freshwater periphytic algae to photosystem II inhibitors. Natural periphytic communities from rivers were collected on artificial substrata, and the effects of short-term exposures to two PSII herbicides (atrazine andisoproturon) on the fluorescence parameters were measured with apulse-amplitude modulated fluorometer. The EC50 for each herbicide were calculated from fluorescence yield indices, and these results were compared to 14C-based primary production measurements on the same communities. The fluorescence-based method appears to give very reliable estimations of EC50 for each pesticide we tested, ranging from 0.46 to5.18 µM and 0.07 to...
Tipo: Journal Article Palavras-chave: PHOTOSYSTEME II; FLUORIMETRIE; CHLOROPHYLLE; METHODE COMMUNITY TOLERANCE; FLUORESCENCE; HERBICIDES; PERIPHYTON; PHOTOSYNTHESIS.
Ano: 2001 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0200014220090064&uri=/notices/prodinra1/2010/11/
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Ability of two Bradyrhizobium japonicum strains to persist in soil and nodulate soybeans after dual inoculation. Inra
Cleyet-Marel, J.C.; Crozat, Y.; Pinochet, X..
The competitiveness of two Bradyrhizobium japonicum strains was determined under controlled conditions. The relationship between the ratio of the nodules formed by the two bradyrhizobial strains and the ratio of the two strains in the inoculum was established and used as an internal standard to evaluate the equilibrium ratio between populations of the two strains in the soil. The fluorescent antibody (FA) technique was also used for counting the bradyrhizobial populations directly in the soil. Results with the FA technique were analysed and compared with the estimate obtained through nodule occupancy. The initial ratio of the two bradyrhizobial strains in populations introduced simultaneously into the soil changed during incubation time and the two strains...
Tipo: Journal Article Palavras-chave: BRADYRHIZOBIUM; FLUORESCENCE; FORMATION DES NODULES.
Ano: 1995 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9700008237064589&uri=/notices/prodinra1/2010/12/
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Apparition de substances de type phenolamide lors de l'interaction Dianthus caryophyllus L. var. scania-Phytophthora parasitica dastur Inra
Ponchet, M.; Martin-Tanguy, J.; Andreoli, C.; Martin, C..
Lorsque des sections basales de boutures d’oeillet (Dianthus caryophyllus L. var. « Scania ») deviennent résistantes à Phytophthora parasitica Dastur, il apparaît des substances très fluorescentes parmi lesquelles un groupe (taches chromatographiques 6-6’) semble plus spécifiquement marquer l’état de résistance lorsqu’elles s’accumulent considérablement in situ. Tous ces composés fluorescents ont une nature aminée et possèdent un spectre d’absorption ultra-violet de type hydroxycinnamique. Nous proposons que ces molécules nouvelles, de type phénolamides, puissent servir de marqueurs physiologiques chez l’oeillet, en particulier de la résistance à P. parasitica. Leur purification en vue d’une identification est en cours.
Tipo: Journal Article Palavras-chave: ELICITATION; PHYTOPHTHORA PARASITICA; DIANTHUS CARYOPHYLLUS; RESISTANCE; PHENOLAMIDE; FLUORESCENCE.
Ano: 1982 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=ANT108&uri=/notices/prodinra1/2008/12/
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Approche histopathologique de la résistance du riz (Oryza sativa) au virus de la panachure jaune (RYMV) IRD
Lett, Jean-Michel.
Tipo: Text Palavras-chave: PATHOLOGIE VEGETALE; VIROSE; BIOLOGIE DU PARASITE; RELATION HOTE PARASITE; RESISTANCE DE L'HOTE; BIOLOGIE MOLECULAIRE; CYTOLOGIE; TEST ELISA; MICROSCOPIE ELECTRONIQUE; FLUORESCENCE; VIRUS DE LA PANACHURE JAUNE.
Ano: 1997 URL: http://www.documentation.ird.fr/hor/fdi:010014938
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Autocatalytic processing of recombinant human procathepsin L. Contribution of both intermolecular and unimolecular events in the processing of procathepsin L in vitro Inra
Ménard, R.; Carmona, E.; Takabe, S.; Dufour, E.; Plouffe, C.; Mason, P.; Mort, J.S..
Tipo: Journal Article Palavras-chave: PROCESSUS AUTOCATALYTIQUE; PROCATHEPSINE L RECOMBINANT; DICHROISME CIRCULAIRE; FLUORESCENCE.
Ano: 1998 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010856c8d17&uri=/notices/prodinra1/2010/09/
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Characterisation without sources : early prehistoric pottery from the South Coast of New Guinea IRD
Bickler, S..
Cet article traite des échanges de poterie le long de la côte sud de la Nouvelle-Guinée. Une collection de poteries datant de la période "red slip" ou "early" datée d'environ 1900-900 BP, a été examinée en utilisant des méthodes de détermination physiques et chimiques. Compte tenu de l'absence d'information sur l'origine des argiles et dégraissants, une approche exploratoire fut adoptée. L'analyse statistique multivariée des éléments traces fut combinée au regroupement par affinités pétrographiques pour isoler différentes "sources". Le résultat de cette analyse permet de construire un modèle simplifié pour distinguer les groupes de poterie de l'île de Yule et de Port-Moresby sur la base des données issues d'analyses par le procédé de la fluorescence X. Les...
Tipo: Text Palavras-chave: FOUILLE ARCHEOLOGIQUE; ART PREHISTORIQUE; CERAMIQUE; CERAMOLOGIE; ANALYSE MINERALOGIQUE; ARGILE; ANALYSE STATISTIQUE; PETROGRAPHIE; FLUORESCENCE; DIFFRACTION DES RX; COMMERCE.
Ano: 1999 URL: http://www.documentation.ird.fr/hor/fdi:010020765
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Degré de condensation des acides humiques et stabilité structurale des sols IRD
Bachelier, Georges.
Tipo: Text Palavras-chave: SOL; ACIDE HUMIQUE; MATIERE ORGANIQUE; METHODE D'ANALYSE; FLUORESCENCE; STABILITE STRUCTURALE; EVALUATION; CONDENSATION.
Ano: 1981 URL: http://www.documentation.ird.fr/hor/fdi:20735
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Dictyostelium extracellular vesicles containing Hoechst 33342 transfer the dye into the nuclei of living cells: A fluorescence study Inra
Tatischeff, I.; Lavialle, F.; Pigaglio-Deshayes, S.; Péchoux-Longin, C.; Chinsky, L.; Alfsen, A..
Cells of the eukaryotic unicellular microorganism Dictyostelium discoideum are constitutively resistant to vital staining of their nuclei by the DNA-specific dye Hoechst 33342. By studying the mechanisms of this resistance, we evidenced that these cells expel vesicles containing the dye for detoxification (Tatischeff et al., Cell Mol Life Sci, 54: 476–87, 1998). The question to be addressed in the present work is the potential use of these extracellular vesicles as a biological drug delivery tool, using Hoechst 33342 as a model of a DNA-targeting drug. After cell growth with or without the dye, vesicles were prepared from the cell-free growth medium by differential centrifugation, giving rise to two types of vesicles. Negative staining electron microscopy...
Tipo: Journal Article Palavras-chave: FLUORESCENCE; CROISSANCE CELLULAIRE DICTYOSTELIUM DISCOIDEUM.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008953b2bfe&uri=/notices/prodinra1/2010/11/
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Distribution et évolution des biomasses végétales dans le petit barrage de Brobo (centre de la Côte d'Ivoire) IRD
Thomas, S.; Cecchi, Philippe; Corbin, Daniel; Assamoi, J.B..
Tipo: Text Palavras-chave: BARRAGE; LAC ARTIFICIEL; LIMNOLOGIE; PRODUCTION PRIMAIRE; BIOMASSE ALGALE; PERIPHYTON; PHYTOPLANCTON; MACROPHYTE; CHLOROPHYLLE; FLUORESCENCE; PROFONDEUR; PLUVIOMETRIE; VARIATION SAISONNIERE; PETIT BARRAGE.
Ano: 2007 URL: http://www.documentation.ird.fr/hor/fdi:010040042
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Effect of aggregation and sodium salt on emulsifying properties of egg yolk phosvitin Inra
Castellani, O.; David Briand, E.; Guérin-Dubiard, C.; Anton, M..
Phosvitin (PVT) is one of the most relevant proteins of hen egg yolk as it could bind multivalent cations in a high quantity. In addition it is capable to stabilise emulsions. Generally, studies about emulsifying properties of protein deal with soluble proteins at a molecular state. However, technological processes and ionic strength conditions can affect the aggregated and charged states of proteins, altering thus their emulsifying properties. In this work, emulsifying properties of PVT at pH 6 in aggregated and non-aggregated states, at two different ionic strengths (0.05 and 0.15 M) have been studied. The emulsifying activity of PVT was inferred from the size of emulsion droplets measured by laser light diffraction. The stability of PVT emulsions under...
Tipo: Journal Article Palavras-chave: PHOSPHOPROTEIN; PHOSVITIN; AGGREGATE; FLUORESCENCE; EMULSION; IONIC STRENGTH; AGGREGATE.
Ano: 2005 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007c2584032&uri=/notices/prodinra1/2007/02/
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Effects of acylation on the structure, lipid binding, and transfer activity of wheat lipid transfer protein Inra
Pato, C.; Tran, V.; Marion, D.; Douliez, J.P..
Study of the effect of protein chemical acylation on their functional properties or activity often brings valuable information regarding structure-function relationships. We performed such work on wheat lipid transfer protein, LTP1, to investigate the role of grafted acyl chains on the lipid binding and transfer properties. LTP1 was acylated by using anhydride derivatives of various chain lengths from C2 to C6. Only the chemical modifications with hexanoic acid yielded a marked effect on the tertiary structure and a slight change in the secondary structure. The affinity of the modified proteins for myristoyl-lysophosphatidylcholine was similar to that of the native protein accompanied by a slight decrease in stoichiometry. Interestingly, the acylation of...
Tipo: Journal Article Palavras-chave: PROTEINE DE TRANSFERT DE LIPIDE; ACYLATION; STRUCTURE; FLUORESCENCE; RELATION STRUCTURE PROPRIETE; MODIFICATION CHIMIQUE LIPID-BINDING PROTEINS; ACYLATION; STRUCTURE; FLUORESCENCE; LIPID TRANSFER.
Ano: 2002 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0200012717093418&uri=/notices/prodinra1/2011/03/
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Effets de la contrainte hydrique sur la photosynthèse du mil IRD
Bois, Jean-François.
La réponse à la contrainte hydrique du mil est étudiée en conditions contrôlées, sur différentes populations. Deux méthodes ont été utilisées : la premièire concerne la mesure des échanges gazeux (CO2 et H2O) en chambre d'assimilation ; la seconde concerne la mesure #in vitro$ de la fluorescence de la chlorophylle. L'étude de la régulation des échanges gazeux se révèle peu discriminante entre populations. La contrainte hydrique affecte la photosynthèse par effet stomatique et par effet non-stomatique. Une intervention précoce de la contrainte hydrique sur les mécanismes photochimiques est mise en évidence. Pour les potentiels hydriques inférieurs à -15 bars, les paramètres de fluorescence montrent une différence significative entre deux populations,...
Tipo: Text Palavras-chave: PHYSIOLOGIE VEGETALE; MIL; PHOTOSYNTHESE; DEFICIT HYDRIQUE; METHODOLOGIE; MESURE; FLUORESCENCE; CHLOROPHYLLE; RESISTANCE; SECHERESSE; ECHANGE GAZEUX.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:38959
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Etude de la résistance du Coffea arabica au nématode Meloidogyne exigua conférée par le gène Mex-1 et mise au point des outils pour son analyse fonctionnelle IRD
Alpizar, Edgardo.
Tipo: Text Palavras-chave: CAFE; NEMATODE PHYTOPARASITE; LUTTE GENETIQUE; RESISTANCE DE L'HOTE; GENE; AMELIORATION DES PLANTES; AMELIORATION GENETIQUE; TRANSFORMATION; RACINE; METHODOLOGIE; ESSAI BIOLOGIQUE; EXPERIMENTATION IN VITRO; EXPERIMENTATION IN VIVO; FLUORESCENCE; MICROSCOPIE ELECTRONIQUE; ANALYSE FONCTIONNELLE; GENE MEX 1; TRANSGENESE.
Ano: 2006 URL: http://www.documentation.ird.fr/hor/fdi:010039187
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Etude de méthodes applicables à l'échantillonnage d'espèce du complexe Simulium damnosum : rapport trimestriel, juillet-août-septembre 1978 IRD
Bellec, Christian; Hébrard, Georges; Mustapha, Aliou.
Tipo: Text Palavras-chave: METHODOLOGIE; ECHANTILLONNAGE; ECOLOGIE; LIEU DE REPOS; PIEGE; MARQUAGE; FLUORESCENCE; CYCLE GONOTROPHIQUE; ADULTE; REINVASION; SIMULIUM DAMNOSUM.
Ano: 1978 URL: http://www.documentation.ird.fr/hor/fdi:15187
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Etude spectrographique de la fluorescence des acides humiques et des acides fulviques de divers sols IRD
Bachelier, Georges.
Tipo: Text Palavras-chave: ACIDE HUMIQUE; ACIDE FULVIQUE; FLUORESCENCE; ANALYSE SPECTRALE; METHODOLOGIE; ETUDE COMPARATIVE.
Ano: 1981 URL: http://www.documentation.ird.fr/hor/fdi:01407
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Etudes écologiques sur Culex pipiens fatigans Wiedemann, 1828 (Diptera, Culicidae) dans une zone urbaine de savane soudanienne ouest-africaine : longévité et déplacements d'adultes marqués avec des poudres fluorescentes IRD
Subra, Raymond.
Tipo: Text Palavras-chave: ECOLOGIE; DEPLACEMENT; ESPERANCE DE VIE; CYCLE GONOTROPHIQUE; MILIEU URBAIN; MILIEU RURAL; METHODOLOGIE; MARQUAGE; FLUORESCENCE; RADIOELEMENT; CULEX PIPIENS FATIGANS.
Ano: 1972 URL: http://www.documentation.ird.fr/hor/fdi:18945
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Expérience de marquage-lâcher-recapture, portant sur Aedes aegypti Linné, en zone de savane soudanienne ouest africaine : 2. Relations entre habitat, morphologie et comportement IRD
Hervy, Jean-Paul.
Tipo: Text Palavras-chave: ECOLOGIE; BIOLOGIE; MORPHOLOGIE; ETHOLOGIE; FEMELLE; GITE; ECHANTILLONNAGE; METHODOLOGIE; CAPTURE; MARQUAGE; FLUORESCENCE; LACHER; AEDES AEGYPTI.
Ano: 1977 URL: http://www.documentation.ird.fr/hor/fdi:19129
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Expérience de marquage-lâcher-recapture portant sur Aedes aegypti Linné, en zone de savane soudanienne ouest-africaine : 1. Le cycle trophogonique IRD
Hervy, Jean-Paul.
Tipo: Text Palavras-chave: ECOLOGIE; PHYSIOLOGIE; CYCLE GONOTROPHIQUE; NUTRITION; FEMELLE; ECHANTILLONNAGE; METHODOLOGIE; CAPTURE; MARQUAGE; FLUORESCENCE; LACHER; AEDES AEGYPTI.
Ano: 1977 URL: http://www.documentation.ird.fr/hor/fdi:19128
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Generalised canonical correlation analysis for the interpretation of fluorescence spectral data Inra
Devaux, M.F.; Courcoux, P.; Vigneau, É.; Novales, B..
Tipo: Journal Article Palavras-chave: FLUORESCENCE; ANALYSE SPECTRALE; ANALYSE DE CORRELATION CANONIQUE.
Ano: 1998 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9900012218074267&uri=/notices/prodinra1/2009/12/
Registros recuperados: 49
Primeira ... 123 ... Última
 

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