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Sample records for huiles essentielles presentant

  1. La production des huiles essentielles en France

    OpenAIRE

    Fernandez, Xavier; Monge, Romain; Chailan, Claude

    2012-01-01

    National audience; The essential oil production in France : species, economy, enhancing.; L'huile essentielle ou essence végétale se définit comme étant un liquide hydrophobe des composés odoriférants volatils secrété par une plante. Ce mélange complexe de diverses molécules (alcools, terpènes, cétones, etc...) est obtenu par distillation à la vapeur d'eau ; en France, ces productions originales sont partie prenante d'une filière dont l'aval est constitué par l'industrie du parfum, de la cosm...

  2. Activité biologique des huiles essentielles extraites de trois plantes aromatiques sur la mite tineola bisselliella (Lepidoptera, tineidae)

    OpenAIRE

    BOUCHIKHI TANI, Zoheir; KHELIL, Momamed Anouar; BENDAHOU, Mourad

    2012-01-01

    Les huiles essentielles extraites par hydrodistillation de trois plantes aromatiques de l'ouest algérientrachyspermum ammi (apiacées) 3ème Congrés internationale franco-maghrebin de Zoologie et d'ichtyologie - Marrakech 2012

  3. Etude de la caractérisation et la composition qualitative des huiles essentielles de six plantes médicinales par spectroscopie IR

    Directory of Open Access Journals (Sweden)

    N. BELBOUKHARI

    2013-03-01

    Full Text Available La séparation et l’identification des constituants des huiles essentielles des plantes ou d’autres sources naturels basée largement sur la chromatographie en phase gazeuse. Dans ce travail on nous développons des techniques de comparaison qui évitent en premier temps la séparation chromatographique, on se basant sur la comparaison des spectres infra rouge (IR des huiles essentielles avec celle des terpènes et sesquiterpènes purs qui constituent en majorité les huiles essentielles.

  4. Élaboration d’une nouvelle margarine additionnée des huiles essentielles de Citrus limon

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    Himed Louiza

    2014-01-01

    Full Text Available Ce travail s’est concentré sur la valorisation des huiles essentielles de Citrus limon. Ces dernières ont été extraites par pression à froid et par hydrodistillation, les rendements obtenus sont équivalents, respectivement, à 1,02 % et 2,18 %. L’activité antioxydante des huiles extraites a été étudiée par le test de DPPH°, ce radical puissant a été efficacement réduit par l’HE1, par l’HE2 par comparaison au Tocoblend. Ces résultats ont été confirmés par le test de blanchissement du β-carotène. Les deux tests ont permis de classer les huiles essentielles de Citrus limon extraites parmi les antioxydants plus puissants par rapport au Tocoblend. L’essai de formulation des margarines de table additionnées d’huiles essentielles de Citrus limon a été expérimenté, en vue de les exploiter et de substituer un additif synthétique (le Tocoblend. Les caractéristiques physico-chimiques des margarines élaborées (gras, non gras et point de fusion s’avèrent conformes à la recette préétablie. En outre, l’indice de peroxyde est conforme aux normes. L’analyse des acides gras a été faite par CPG, elle a montré la richesse de nos margarines en acides gras essentiels avec un rapport AGPI/AGS de 0,85. L’évaluation de la stabilité oxydative est réalisée par les tests de Rancimat et Schaal, les résultats obtenus ont montré que les margarines à huiles essentielles de Citrus limon étaient plus résistantes que celle au Tocoblend et que la margarine à l’HE1 était la plus résistante vis-à-vis de l’oxydation forcée. La métrologie sensorielle a été faite par les assesseurs de la margarinerie de CEVITAL et indique que les margarines aux huiles essentielles obtenues sont considérées comme étant homogènes, de couleur, de saveur et d’odeur acceptables et appréciées.

  5. Incidence des plantes régénérées in vitro sur les huiles essentielles ...

    African Journals Online (AJOL)

    SARAH

    31 mars 2016 ... L'analyse des huiles essentielles des deux espèces de Ocimum étudiées a été réalisé par la méthode .... biotechnologies végétales ont été développées pour .... Laboratoire d'Enzymologie et de Biochimie des Protéines.

  6. Analyse chimique et propriétés biologiques des huiles essentielles de Chiliadenus rupestris et Thymus coloratus (Zaater) de la région de Tlemcen.

    OpenAIRE

    Daoudi, Fatiha

    2016-01-01

    Les plantes médicinales restent toujours la source fiable des principes actifs connus par leurs propriétés thérapeutiques. Le présent travail porte sur la composition chimique et l’évaluation du pouvoir antioxydant, antibactérien et hémolytique de deux huiles essentielles : Thymus ciliatus sspcoloratus et Chiliadenus rupestris, deux plantes endémiques de l’Algérie. L’extraction des deux huiles essentielles par hydrodistillation, a montré que le rendement en huile de Chiliade...

  7. Variabilité chimique et intérêt économique des huiles essentielles de deux menthes sauvages : Mentha pulegium (Fliou) et Mentha rotundifolia (Domrane) de l’ouest algérien.

    OpenAIRE

    TAALBI, Amina

    2016-01-01

    Notre travail s’est basé principalement sur une étude de la variabilité chimique et l’intérêt économique des huiles essentielles de deux menthes sauvages de l’ouest algérien: Mentha pulegium et Mentha rotundifolia. Ces deux menthes, largement répandue en Algérie, de la famille des Lamiaceae sont connus dans le monde pour leurs propriétés thérapeutiques (antiseptique, antinévralgique, analgésique…) et l’intérêt économique de leurs huiles essentielles....

  8. Huile

    OpenAIRE

    Camps-Fabrer, H.

    2012-01-01

    L’huile peut être d’origine végétale ou animale. Nous ne traiterons pas la diversité des substances d’où peut être tirée l’huile et, pour ne citer qu’elles : huile de palme ou de myrte, d’iris ou de camomille, de rose ou de lilas, de pied de bœuf ou de graines de laitues et raves signalées pour les premières par Ibn Mangli et par Edrisi pour la dernière. Leur utilisation n’est qu’anecdotique et ne revêt pas l’importance des huiles comestibles typiques du monde berbère, que sont l’huile d’oliv...

  9. Variabilité de la composition chimique des huiles essentielles de Coriandrum sativum L et Pimpinella anisum L au cours de développement végétatif.

    Directory of Open Access Journals (Sweden)

    K. FYAD

    2013-03-01

    Full Text Available Dans cette étude, Nous nous sommes intéressés à quantifier et identifier les huiles essentielles extraites par hydrodistillation des parties aériennes fraîches des deux plantes aromatiques : Coriandrum sativum L et Pimpinella anisum L, aux cours de leur cycle de croissance (avant, pendant et après floraison ; cultivées dans un champ à l’université de Béchar. La récolte a été faite au cours de l'année 2011. Les huiles essentielles obtenues à partir des parties aériennes fraîches durant le cycle végétatif, ont été analysés par CPG.

  10. Evaluation des activités antioxydante et antibactérienne de l’huile essentielle de Citrus limon (variété Lisbon extraite par hydrodistillation

    Directory of Open Access Journals (Sweden)

    Louiza HIMED

    2016-03-01

    Full Text Available La présente étude porte sur l’évaluation des propriétés antioxydante et antibactérienne de l’huile essentielle de Citrus limon (Lisbon extraite par hydrodistillation et analysée par GC-MS. Le pouvoir antioxydant est évalué par le test au DPPH et le test de blanchissement du β-carotène. L’activité antibactérienne vis-à-vis de neuf souches bactériennes (deux à Gram positif et sept à Gram négatif est évaluée par la méthode des aromatogrammes et la méthode de dilution d’agar pour déterminer les CMI. L’extraction a donné un rendement moyen de 1,34±0,012%. Cette huile essentielle a montré des propriétés antioxydante et antibactérienne importantes. La concentration efficace qui réduit 50 % du DPPH en solution est de 0,09±0,001 µg/ml qui exprime une activité antioxydante plus importante que celle de α-tocopherol, ce résultat a été confirmé par le test de blanchissement du β-carotène. Les bactéries testées ont montré une sensibilité à l’huile essentielle. Ces activités sont liées à la richesse de l’huile essentielle en monoterpènes (81,01%.

  11. Activité antioxydante et anti-candidosique de l’huile essentielle de Laurus nobilis L. provenant de la région d’El Kala (Nord–Est Algérien

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    Amira OUIBRAHIM

    2015-12-01

    Full Text Available L’huile essentielle extraite de Laurus nobilis L. par hydrodistillation a fourni un rendement de 0,7%. L’analyse de l’huile essentielle par CG/SM a permis l’identification de 17 composants, principalement des monoterpènes. 1,8 cinéole (36,31%, β-linalol (22.52%, eugenol-methylether (9.17% et camphene (7.37% ont constitué les composés majoritaires avec un total de 96,95%. L’activité antioxydante in vitro a été évaluée à travers trois méthodes: le test de piégeage du radical libre DPPH avec un IC50 de 1,55 ± 0,14 mg/ml ; le test de blanchiment de β-carotène qui a permis d’enregistrer un pourcentage d’inhibition de la peroxydation lipidique de 41,97% et finalement l’évaluation du pouvoir réducteur qui s’est avéré faible par rapport à celui de l’acide ascorbique. L’activité anticantidosique a été testée sur 4 souches de Candida albicans en utilisant la méthode de dilution en milieu gélosé. Les quatre souches ont montré une sensibilité avec une CMI de 0,68 mg/ml pour les souches d’origine urinaire et vaginale et 1.08 mg/ml pour les Candida d’origine bucco-nasale. L’huile essentielle de Laurus nobilis originaire de la région d’El Kala a manifesté des propriétés antioxidantes modérées et des propriétés anticandidosiques.

  12. Etude de l’activité antibactérienne des huiles essentielles d’Inula viscosa, Salvia officinalis et Laurus nobilis de la région de Bejaia

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    Nawel Kheyar

    2014-02-01

    Full Text Available Dans cette étude, l’activité antibactérienne des huiles essentielles d’Inula viscosa, Salvia officinalis et Laurus nobilis a été évaluée in vitro par la méthode de diffusion sur gélose contre des souches de référence et multirésistante : il s’agit de Staphylococcus aureus (ATCC 6538, Pseudomonas aeruginosa (ATCC 27853, Escherichia coli (NAR, Klebsiella pneumoniae (E47 et Listeria innocua (CLIP 74915. Pseudomonas aeruginosa a été l’espèce la plus résistante, cependant, Staphylococcus aureus s’est montrée la plus sensible aux huiles testées. Les résultats de l’analyse chimique de la composition de l’huile Inula viscosa par chromatographie en phase gazeuse indiquent la richesse de cette dernière en thymol (6,93% and carvacrol (2,27%, ce qui pourrait être à l’origine des résultats observés.

  13. etude de l'ifficacité des huilles essentielles de curcuma longa comme un biopesticides cas antifongique

    OpenAIRE

    larabi, souhila; rabah, souhila

    2014-01-01

    Résumé Les plantes médicinales constituent une source immense de métabolites secondaires, dont les huiles essentielles, dotées de nombreuses activités biologiques ; Cette étude a pour objectif l'évaluation de l'effet des huiles essentielles de Curcuma longa Linn comme un biopesticide Cas antifongique. L'extraction des huiles essentielles de Curcuma Ionga Linn a été réalisée par hydrodistillation. Le rendement en HE est de 0,96%. L'activité antifongique est mise en évidence p...

  14. Variabilité de la composition chimique des huiles essentielles de Mentha rotundifolia du Nord de l’Algérie

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    Georges Lognay

    2007-01-01

    Full Text Available Variability of the chemical composition of Mentha rotundifolia from Northern Algeria. Algerian oils of Mentha rotundifolia (L. Huds., obtained by steam distillation (yield : 0,8%, have been analysed by means of GC-FID and GC/MS. The results indicate clearly the occurrence of two chemotypes which are presently described. The former contains high proportions of piperitone oxide (19,7–31,4% and piperitenone oxide (27,8–29,4% respectively and the latter revealed piperitenone (54,9% and piperitenone oxide (17,6% as the major constituents. Such particular composition is reported for the first time within the M. rotundifolia species.

  15. etude de pouvoir antimicrobiene et antioxydants des huilles essentielles

    OpenAIRE

    MOHAMMEDI, Zohra

    2014-01-01

    ensemble. - Résumé Les extraits naturels issus des végétaux contiennent une variété de composés phénoliques et des huiles essentielles auxquelles on attribue un pouvoir inhibiteur des microorganismes et des capacités antioxydantes. Les huiles essentielles de L. stoechas L et S. olusairum L ont été analysées par CPG et RÎvIIN du carbone-13. Les constituants majeurs sont : fenchone, cinéole et camphre pour la Lavande. Le fiiranodiène/furanoélémène (46 1/0) pour la partie aé...

  16. Etude des activités antimicrobienne et antioxydante des huiles essentielle et des flavonoides d'Artemisia herba alba Asso; Artemisia judaica .L. ssp. sahariensis; Artemisia campestris L; Herniaria mauritanica Murb et Warionia saharae Benth. et Cou.

    OpenAIRE

    GHERIB, MOHAMED

    2014-01-01

    naturels. Résumé Les plantes sont depuis toujours une source essentielle de médicaments. Aujourd'hui encore une majorité de la population mondiale, plus particulièrement dans les pays en voie de développement, se soigne uniquement avec des remèdes traditionnels à base de plantes. De l'aspirine au taxol, l'industrie pharmaceutique moderne elle-même s'appuie sur la diversité des métabolites secondaires des végétaux pour trouver de nouvelles molécules aux propriétés biologiq...

  17. Réglementations sur l’étiquetage et la présentation des huiles d’olive

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    Pouyet Brigitte

    2014-09-01

    Full Text Available L’huile d’olive est uniquement obtenue à partir du fruit de l’olivier (Olea europaea L.. Elle est mise sur le marché en respectant les dénominations et définitions suivantes : l’huile d’olive vierge est obtenue directement des olives, uniquement par des procédés mécaniques, éventuellement physiques et notamment thermiques, à condition qui n’altèrent pas l’huile. L’huile d’olive vierge ne doit subir d’autre traitement que le lavage, la décantation, la centrifugation et la filtration. Dans les huiles d’olives vierges on distingue deux catégories : l’huile d’olive vierge et l’huile d’olive vierge extra. L’huile d’olive lampante est impropre à la consommation. L’huile d’olive sans qualificatif est un mélange d’huile d’olive raffinée et d’huile d’olive vierge. L’huile de grignons d’olive est obtenue par extraction avec des solvants ou des traitements physiques, à partir du produit restant lorsque l’huile d’olive vierge ou vierge extra est extraite. Les méthodes d’analyses sont essentielles pour distinguer ces différentes catégories d’huiles d’olive.

  18. HUILES ESSENTIELLES DE : UTILISATIONS ET ACTI VITES BIOLOGIQUES

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    M.A. BOUZIDI

    2013-09-01

    Full Text Available As part of the valorization of Mediterranean plant species and especially the local flora of Tessala Mountain(Sidi Bel Abbes country, North West of Algeria, we conducted a study on the quantification of essential oil of Ruta chalepensis L. and highlightit antibacterial effect. It should be noted in the study area that this specie has never been any study. The extraction of essential oils of Ruta chalepensis L. by hydro distillation revealed a yield of 7.23%.The study of the antibacterial effect of essential oils againsttwo bacterial strains(Staphylococcus aureus ATCC 25923, Pseudomonas aeruginosa ATCC 27853 shows that this activity varies depending on different concentrations.

  19. Etude phytochimique ,activités antioxydanteset antimicrobiennes des extraits de cinq plantes médicinale et analyses de leur huilles essentielles

    OpenAIRE

    SELADJI, MERYEM

    2015-01-01

    Dans le cadre de la découverte de nouvelles molécules actives à partir des sources naturelles, de l’Ouest d’Algérie, nous nous sommes intéressés dans ce travail à l’étude des métabolites secondaires (phénols totaux, flavonoïdes, tanins, et huiles essentielles) ainsi qu’à l’évaluation des activités antioxydantes et antimicrobiennes des extraits de cinq espèces végétales Nepeta nepetella, Mentha rotundifolia, Moricandia arvensis, Atriplex canescens et Schinus molle. Les teneurs en poly...

  20. Etude des propriétés anti-oxydantes, anti-inflammatoires, anti-prolifératives et anti-migratoires des huiles essentielles de quelques plantes médicinales du Burkina Faso sur des lignées cellulaires du cancer de la prostate et de glioblastomes

    OpenAIRE

    Bayala, Bagora

    2014-01-01

    Essential oils are natural complex of volatile and odorous molecules, synthesized by aromatic plants. They have anti-infective, antioxidant, anticancer properties... The present work concerned the chemical composition, antioxidant, anti-inflammatory and anticancer propertiesof essential oils of Cymbopogon giganteus Chiov., Cymbopogon citratus [DC] Stapf, Ocimum basilicum Linnæus, Ocimum americanum Linnæus, Hyptis spicigera Lamarck, Lippia multiflora Moldenk, Ageratum conyzoides Linnæus, Eucal...

  1. EFFETS DES HUILES ESSENTIELLES SUR LES QUALITES HYGIENIQUES ET ORGANOLEPTIQUES DE LA BOISSON "BISSAP"

    Directory of Open Access Journals (Sweden)

    S.A. ADISSO

    2011-01-01

    Full Text Available This study was conducted in a conservation perspective. Thus, we have submitted 6 samples of "hibiscus" beverage taken from different Market in Cotonou Benin to microbiological and sensory analysis. The microbiological parameters studied (total mesophilic flora (total, total and thermotolerant coliforms (E. coli, staphylococci (Staphylococcus aureus, Salmonella, yeasts and moulds have given widely varying results for beverages analyzed immediately after purchase. In order to evaluate the effect of essential oils from Ocimum basilicum L. (Lamiaceae and Melaleuca leucadendron L. (Myrtaceae on mesophilic and fungal flora, a low dose of oils is added to a sample of the drink containing the sought germs and has stored at 26 ± 1°C or 4 ± 1°C. This study showed that the samples preserved with essential oils have retained their original color with natural flavors for eight days as opposed to controls not treated with essential oils, and are fermented rapidly. The degree of inhibition of mesophilic and fungal flora in different mixtures ranged from 22.87 to 99.59%. Therefore the oils have had a microbiostatic effect on germs initially contained in the drink. However,bactericidal and fungicidal effects of low doses of essential oils have been observed in vitro on strains isolated from the drinking. These results provide a basis for the conservation of Hibiscus "drink.

  2. Efficacité des huiles essentielles de Cymbopogon citratus et de ...

    African Journals Online (AJOL)

    Efficacy of essential oils of Cymbopogon citratus and Mentha piperita in ... Mentha piperita essential oil has menthol (46.7%) and neomenthol (8.28%) as major ..... Tunisian Thymus capitus Hoff. et Link. ... vulgaris (L) and Pimenta racemosa.

  3. Variabilité de la composition chimique de l'huile essentielle des ...

    African Journals Online (AJOL)

    SARAH

    30 avr. 2015 ... Objective: Characterize the essential oils (EO) of Lippia multiflora leaves ... composition of the essential oil from the Lippia multiflora leaves ..... d'autres plantes médicinales par exemple Thymus vulgaris (Nejad et al., 2008).

  4. 93 Occurrence et composition chimique de l'huile essentielle des ...

    African Journals Online (AJOL)

    Dibalo

    L. multiflora, influence of soil pH and the contents of organic carbon (C), total nitrogen ...... Malgré, le rôle important que l'azote joue dans la nutrition des végétaux ..... de la synthèse de composés nutraceutiques et aromatiques dans les fruits et.

  5. Étude de l'activité antibactérienne des huiles essentielles de ...

    African Journals Online (AJOL)

    SARAH

    31 juil. 2014 ... associée à l'évolution des civilisations. Dans toutes .... L'évolution peut, alors, être fulminante, aiguë et .... pratique quotidienne, c'est le milieu solide qui est le plus simple et ..... critiques et règles de lecture interprétative pour.

  6. VARIABILITÉ DE L’ACTIVITÉ ANTIMICROBIENNE DES HUILES ESSENTIELLES D’ EUCALYPTUS CAMALDULENSIS SELON L’AGE DES FEUILLES

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    B. YABRIR

    2015-11-01

    Full Text Available Essential oils extracted by hydrodistillation using "Clevenger" apparatus from the leaves of one, two and three years older of Eucalyptus camaldulensis showed variability as to their timicrobial activity on three bacterial strains: E. coli (ATCC 25922, staphylococcus aureus (ATCC 25923 and Pseudomonas aeruginosa(ATCC 27853 and two fungal strains (Candida lbicans and Aspergillus flavus. The type of the activity is bacteriostatic. The volatile phase seems to be active only against Staphylococcus aureus. The leaves of three years are less rich in oils; those of two years have the hi ghest yield.

  7. Etude chimique et biologique des huiles essentielles de Juniperus phoenicea ssp. lycia et Juniperus phoenicea ssp. turbinata du Maroc

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    Mansouri, N.

    2011-01-01

    Full Text Available Chemical and biological study of essential oils of Moroccan Juniperus phoenicea ssp. lycia and Juniperus phoenicea ssp. turbinata. The composition of the essential oils of the branches and berries of Juniperus phoenicea (Cupressaceae, J. phoenicea ssp. lycia (plain and J. phoenicea ssp. turbinata (mountain, obtained by hydrodistillation, collected from Morocco, was analyzed by GC and GC/MS. The yields of essential oils were varying in function of the subspecies and of the part of the plant studied. The essential oils of these tree species are largely dominated by α-pinene and may be an important source of this component of a great interest on the international market. The effectiveness of essential oils from branches of the subspecies lycia against fungi decay wood has also been emphasized.

  8. Assainissement microbiologique de l'air et des systèmes de ventilation au moyen d'huiles essentielles

    OpenAIRE

    Pibiri, Marie-Cécile

    2006-01-01

    Ventilation systems often host bacteria and fungi that may be dangerous for the health of exposed people. Essential oils are one means among others to prevent microbial development. Used as a basis for many traditional therapies, these odorant plant extracts have been studied extensively in the medical domain and their effectiveness in the treatment of numerous pathologies has been demonstrated. As opposed to most antimicrobial agents currently used for air disinfection, essential oils are no...

  9. SCREENING DES ACTIVITES ANTIOXYDANTE, ANTIBACTERIENNE ET ANTIFONGIQUE DE L’HUILE ESSENTIELLE EXTRAITE DU ZESTE DE PAMPLEMOUSSE (Citrus paradisi

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    H. M.Arohalassi

    2015-11-01

    Full Text Available The aim of this research is to assess in vitro antioxidant, antibacterial and antifungal activities of essential oil extracted from grapefruit peel (Citrus paradisi. Extraction has been made by water distillation. Antioxidant activity was obtained by using DPPH and β-carotene blanching. Results showed a high antioxidant activity (48.81% relatively to E vitamin (47.21% when antibacterial and antifungal activities have been made by disc diffusion method, results showed some inhibition activity of essential oil of grapefruit (Citrus paradise on some micro-organism.

  10. Décoloration d’une huile végétale (huile de lin)

    OpenAIRE

    TAHRAOUI, sarah

    2014-01-01

    aprés anlyses chimique et phsico-chimique de cinq terres décolorante différentes (tonsil EX 096 otimum (allemagne), T.D de maghnia (algérie) , t.d de turquie et T.D d'indonésie,nous avons effectué la décoloration d'une huile de lin par les cinq terres activées en faisant varier plusieurs paéramétre comme le temps d'agitation,la température de l'huile,le type et le pourcentage ed terre utilisée.

  11. Le commerce international de l’huile d’olive

    OpenAIRE

    Denis, L.

    2013-01-01

    1 – Comme vous le savez, depuis la deuxième guerre mondiale, les huiles végétales fluides alimentaires extraites de graines oléagineuses ont enregistré une croissance très importante. Cette croissance liée à l’augmentation des besoins globaux en huiles végétales fluides alimentaires et en farines protéiques a été particulièrement marquante à partir de l’année 1960, notamment pour l’huile de soja, l’huile de tournesol et l’huile de colza dont les productions ont évolué comme suit (en milliers ...

  12. Huile de colza et consommation alimentaire

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    Fénart Évelyne

    2004-03-01

    Full Text Available L’évolution des politiques agricoles aussi bien que les acquis scientifiques ont fortement influencé les conditions d’approvisionnement en graines oléagineuses en France. A la faveur de ces évolutions, le colza, culture déjà bien adaptée aux conditions pédo-climatiques et produite traditionnellement, se développe fortement au cours des trois dernières décennies du XXe siècle. En revanche la consommation alimentaire n’a pas répondu à ce succès de la culture puisque le doute sur l’innocuité de l’acide érucique l’a fait chuter, tandis que la réglementation sur son étiquetage a fortement gêné son développement, en dépit du potentiel représenté par ses qualités nutritionnelles. On assiste aujourd’hui à une revalorisation de l’image alimentaire de l’huile de colza en France, après la prise de conscience de l’importance de l’équilibre alimentaire en acides gras indispensables. L’huile de colza apparaît aujourd’hui non plus seulement comme une bonne huile alimentaire économique, mais comme un moyen d’améliorer la composition lipidique via la consommation des ménages, mais aussi au travers des repas pris en dehors du domicile ou encore des produits de l’industrie alimentaire.

  13. Metagenome Sequencing of the Microbial Community of a Solar Saltern Crystallizer Pond at Cáhuil Lagoon, Chile

    Science.gov (United States)

    Plominsky, Alvaro M.; Delherbe, Nathalie; Ugalde, Juan A.; Allen, Eric E.; Blanchet, Marine; Ikeda, Priscila; Santibañez, Francisco; Hanselmann, Kurt; Ulloa, Osvaldo; De la Iglesia, Rodrigo; von Dassow, Peter; Astorga, Marcia; Gálvez, María Jesús; González, María Lorena; Henríquez-Castillo, Carlos; Vaulot, Daniel; Lopes do Santos, Adriana; van den Engh, Gerrit; Gimpel, Carla; Bertoglio, Florencia; Delgado, Yolaine; Docmac, Felipe; Elizondo-Patrone, Claudia; Narváez, Silvia; Sorroche, Fernando; Rojas-Herrera, Marcelo

    2014-01-01

    huil Lagoon in central Chile harbors distinct microbial communities in various solar salterns that are arranged as interconnected ponds with increasing salt concentrations. Here, we report the metagenome of the 3.0- to 0.2-µm fraction of the microbial community present in a crystallizer pond with 34% salinity. PMID:25395641

  14. L’UTILISATION DE L’HUILE DE CLOU DE GIROFLE COMME ANESTHÉSIQUE POUR LES SMOLTS DE SAUMON ATLANTIQUE (SALMO SALAR L. ET COMPARAISON DE SES EFFETS AVEC CEUX DU 2-PHENOXYETHANOL.

    Directory of Open Access Journals (Sweden)

    CHANSEAU M.

    2002-04-01

    Full Text Available Cette étude révèle que l’huile de clou de girofle est un bon anesthésique pour les smolts de saumon atlantique, plus performant que le 2-phénoxyéthanol car agissant pour de plus faibles concentrations. Elle présente de plus un facteur de sécurité plus élevé, permettant notamment des temps d’exposition à l’anesthésique plus importants. Le temps de recouvrement de la position d’équilibre est toutefois nettement plus long chez les poissons anesthésiés avec l’huile de clou de girofle. Les concentrations optimales permettant la manipulation des poissons, les mesures des tailles et des poids, de même que le marquage à l’aide de Pit-Tag, se situent entre 1,7.10-4 mol.L-1 et 2,35.10-4 mol.L-1, soit entre 0,3 mL et 0,4 mL d’huile essentielle de clou de girofle (90 % d’eugénol pour 10 litres d’eau. Cet anesthésique étant peu soluble dans l’eau, en particulier lorsque la température de l’eau est relativement basse (15°C ou moins, un volume d’éthanol correspondant à 10 fois le volume d’huile doit être rajouté.

  15. Huile d’olive et huile de graines au xixème siècle en France (vu de la région Marseillaise)

    OpenAIRE

    Pierrein, Louis

    2013-01-01

    Au début du siècle, l’huile d’olive domine largement le marché dans le Midi de la France : aussi bien comme huile à bouche, comme huile de table, que comme huile à fabrique pour la savonnerie. C’est la période du « savon vert », à l’huile d’olive. Deux limitations à cette prépondérance : Comme produit à bouche, l’huile d’olive doit se borner à un marché territorialement assez restreint, au Midi méditerranéen essentiellement. On connait la division traditionnelle, alors, entre la France de la ...

  16. Air quality. How to give it back its original purity? The proliferation of air cleansers. Filters must be changed regularly. Measurement of the filtering efficiency of air treatment systems. The air treatment plants on the way of certification. Essential oils in a high building; Qualite de l'air. Comment lui rendre sa purete originelle? La proliferation des purificateurs d'air. Il faut changer les filtres regulierement. Mesure de l'efficacite de filtration des systemes de traitement d'air. Les centrales de traitement d'air sur la voie de la certification. Des huiles essentielles dans un immeuble de grande hauteur

    Energy Technology Data Exchange (ETDEWEB)

    Grumel, N.

    2000-07-01

    Outside air is polluted while the ambient indoor air is saturated with microorganisms. Inside buildings, the aeraulic networks are the link between both environments and the privileged place to clean the air using filtering systems. However, the notion of air quality is still badly perceived by owners, in particular in tertiary buildings. In France, efforts have to be made on the maintenance of aeraulic networks by hygiene specialists. Air quality inside buildings must be taken into consideration using communication and regulations. This dossier takes stock of the problem of air quality and of the available means to ensure a good air quality inside residential and tertiary buildings. The maintenance of air filters in one of the key points. It should be integrated in the general maintenance concept of buildings. The dossier includes a study of the in-situ measurement of the filtering efficiency of air treatment systems. This method is described in the Eurovent recommendation 4/10 of 1996. It has been experimented by the French technical centre of aeraulic and thermal industries (Cetiat) and the results are reported in the study. The performances of air treatment plants are now certified by Eurovent. This European organization has defined a program of tests which is conformable with the European EN 1886 and EN 13053 European standards. Finally, a new protocol of air decontamination based on the micronizing of essential oils in the aeraulic network of a 29 floors building is presented. (J.S.)

  17. Extraction Sans Solvant Assistée par Micro-ondes
    Conception et Application à l'extraction des huiles essentielles

    OpenAIRE

    Lucchesi, Marie-Elisabeth

    2005-01-01

    Solvent-Free Microwave Extraction (SFME) is a new extraction process developed at the Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments of Université de La Réunion. SFME is a combination of traditional extraction technique and an innovative technology, microwave heating. Indeed, although the cohobation and trapping systems of mixing essential water-oil vapor resemble Hydro-Distillation (HD), microwave heating reduces extraction delays considerably and removes the ne...

  18. L'ylang-ylang [Cananga odorata (Lam. Hook. f. & Thomson] : une plante à huile essentielle méconnue dans une filière en danger

    Directory of Open Access Journals (Sweden)

    Benini, C.

    2010-01-01

    Full Text Available Ylang-ylang [Cananga odorata (Lam. Hook. f. & Thomson]: a barely known essential oil plant in an industry at risk. Cananga odorata is a tropical tree from the Annonaceae family, native of Indonesia. Only the forma genuina can be called ylang-ylang. Nowadays, it is mainly cultivated in the Indian Ocean Islands in order to extract the ylang-ylang essential oil for the cosmetic industry. Ylang-ylang develops on many types of soils, under high temperatures and average precipitations of 1,500 mm per year. The pollarding, the maintenance, the elimination of water sprouts and the weeding must be performed to insure a high flower yield and facilitate harvesting. Flower harvest takes place all year long but flowers and essential oils yields are higher during the dry season. Mature and fresh flowers are then distillated and fractionated to obtain essential oil. Generated incomes are important for the economy of the three main producers: Union of Comoros, Madagascar and Mayotte. However, this plant is still poorly known despite its great economic value. This lack of information is a bottleneck for solving the ylang-ylang industry problems which endanger it. Moreover, there is no improvement program of this plant despite the high added value of its essential oil, probably due to the fact that its reproduction biology is far from being known. A thorough study of the plant and its essential oil could generate information necessary to solve the aforementioned problems, maintain and develop the ylang-ylang industry.

  19. Effet de l'hybridation interspecifique sur la teneur et la composition chimique des huiles essentielles d'eucalyptus cultivés au Maroc

    Directory of Open Access Journals (Sweden)

    Farah A.

    2002-01-01

    Full Text Available Interspecific hybridization effect on the content and the chemical composition of essential oils of eucalyptus grown in Morocco. In this work, the quality and quantity of the leave essential oils of five Eucalyptus hybrids were determined. The crosses of Eucalyptus globulus ssp. maideni, Eucalyptus globulus ssp. globulus, Eucalyptus grandis, Eucalyptus cladocalyx and Eucalyptus diversicolor with Eucalyptus camaldulensis have been studied. The average yield of parental species samples varies according to species. It is 3.4% for Eucalyptus globulus spp. maideni, 2.5% for Eucalyptus globulus spp. globulus and 1.6% for Eucalyptus diversicolor. Eucalyptus camaldulensis, Eucalyptus grandis and Eucalyptus cladocalyx are characterized by an average yield less than 1%, i.e. 0.8%, 0.4% and 0.3%, respectively. The average yields of the two hybrids Eucalyptus camaldulensis x Eucalyptus globulus spp. maideni and Eucalyptus camaldulensis x Eucalyptus diversicolor are 2.9% and 1.4% respectively. The combinations Eucalyptus camaldulensis x Eucalyptus globulus spp. globulus, Eucalyptus camaldulensis x Eucalyptus cladocalyx and Eucalyptus camaldulensis x Eucalyptus grandis are characterized by the lowest yields, i.e. 1%, 0.8% and 0.8% respectively. The analysis of the chemical composition shows that the hybrids Eucalyptus camaldulensis x Eucalyptus globulus spp. maideni give 1,8-cineole rates superior to 70%, which is required by the users. Comparatively to Eucalyptus camaldulensis, the essential oils of the other crosses reveal a slight decrease in percentage of this product. However, increases of the alpha-pinene and p-cymene contents have been recorded. In general, all products detected in essential oils have average percentages intermediate between those of parental species. Hybridization of eucalyptus can improve the quality and the quantity of eucalyptus essential oils.

  20. Activité antifongique des huiles essentielles de Thymus bleicherianus Pomel et Thymus capitatus (L. Hoffm. & Link contre les champignons de pourriture du bois d'oeuvre

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    Amarti F.

    2008-01-01

    Full Text Available Antifungal activity of the Thymus bleicherianus Pomel and Thymus capitatus (L. Hoffm. & Link essential oils againstwood-decay fungi. Essential oils and their constituents have a long history of applications as antimicrobial agents, but theiruse as wood preservatives has rarely been reported. This study deals with the antifungal activity of two medicinal and aromaticplants essential oils of the Moroccan flora against four wood-decay fungi, in order to find new bioactive natural products. Thechemical composition of essential oils extracted by hydrodistillation from the aerial parts of Thymus bleicherianus Pomel andThymus capitatus (L. Hoffm. & Link was analyzed by GC and GC-MS. The major components of T. bleicherianus oil wereα-terpinene (42.2% and thymol (23.9%. Carvacrol (70.92% was the predominant constituent in the essence of T. capitatus.Minimal inhibitory concentrations of the essential oils added to malt agar medium in defined concentrations were determinedby a screening test with the agar dilution method. The oils, object of the survey, showed a strong antifungal activity againstall tested fungi.

  1. Activité larvicide sur Anopheles gambiae Giles et composition chimique des huiles essentielles extraites de quatre plantes cultivées au Cameroun

    Directory of Open Access Journals (Sweden)

    Tchoumbougnang F.

    2009-01-01

    Full Text Available Larvicidal activity against Anopheles gambiae Giles and chemical composition of essential oils from four plants cultivated in Cameroon. The chemical composition of the essential oils obtained by hydrodistillation of dry leaves from Cymbopogon citrates (DC. Stapf, Ocimum canum Sims, Ocimum gratissimum L. var 'gratissimum' L. and Thymus vulgaris L. cultivated in Cameroon were analyzed and their larvicidal activity against fourth instar larvae of Anopheles gambiae Giles were determined. The yields of extraction indicate that T. vulgaris (0.95% was richer in essential oil than C. citratus (0.67%. O. canum and O. gratissimum have approximately the same content in volatile constituents (0.59% and 0.60%, respectively. The analyses by GC and GC/MS showed that these oils are monoterpenic (86.8-97.4%. Oxygenated monoterpenes predominate in C. citratus and O. canum (81.6% and 68.9%, respectively while O. gratissimum oil contains a majority of monoterpene hydrocarbons (61.0%. T. vulgaris is characterized by the same proportion of monoterpene hydrocarbons (45.6% and oxygenated monoterpenes (48.9%. The main compounds found in the essential oil of C. citratus are acyclic monoterpenes such as geraniol (15.6%, geranial (39.3%, neral (21.9% and myrcene (14.0%. The essential oil of T. vulgaris is characterized by p-menthane structures given by thymol (40.1%, p-cymene (23.4% and γ-terpinene (15.1%; p-cymene (32.1% and thymol (24.3% were also the constituents quantitatively important in O. gratissimum essential oil while linalool (56.3% and limonene (10.9% were predominant in O. canum. Bioassay test done by the World Health Organization standard protocol revealed that these essential oils have remarkable larvicidal properties as they could induce 100% mortality in the larvae of A. gambiae at the concentration of 100 ppm for C. citratus, 200 ppm with T. vulgaris, 350 ppm for O. gratissimum and 400 ppm for O. canum. Their LC50 and LC80 show the same reactivity order. The essential oil of C. citratus was found to be the most efficient, with respective values of: LC50 = 18 ppm and LC80 = 25 ppm.

  2. Composition chimique et activité antimicrobienne des huiles essentielles de Thymus algeriensis Boiss. & Reut. et Thymus ciliatus (Desf. Benth. du Maroc

    Directory of Open Access Journals (Sweden)

    Chaouch, A.

    2010-01-01

    Full Text Available Chemical composition and antimicrobial activity of the Thymus algeriensis Boiss. & Reut. and Thymus ciliatus (Desf. Benth. essential oils of Morocco. The aim of this work is to study the chemical composition and antibacterial and antifungal activity of essential oils of Thymus algeriensis Boiss. & Reut. and Thymus ciliatus (Desf. Benth. of Morocco against seven microorganisms. The essential oils of T. ciliatus are characterized by the presence of thymol (44.2%, β-E-ocimene (25.8% and α-terpinene (12.3% as principal chemical components. The essential oils of T. algeriensis are formed mainly by camphor (27.7% and α-pinene (20.5%. The oil of T. ciliatus showed a strong antibacterial and antifungal activity against all tested bacteria and fungi. This bioactivity is due mainly to the richness of this essential oil in thymol known for its effectiveness against the microbial agents.

  3. Recherche d’adultération dans les huiles végétales : application à la qualité des huiles vierges et notamment de l’huile d’olive

    Directory of Open Access Journals (Sweden)

    Ollivier Denis

    2003-07-01

    Full Text Available La recherche d’adultération des huiles végétales alimentaires, notamment par des huiles raffinées dans les huiles vierges, et plus spécialement dans le cas des huiles d’olive vierge, constitue un véritable défit analytique. L’évolution de l’aspect réglementaire est décrite. Les différentes méthodes de dosage sont passées en revue : compositions en acides gras, en stérols, en triglycérides, analyse spectrophométrique, teneurs en stigmastadiènes. Un bilan analytique est dressé.

  4. Caractéristiques des huiles de lin et de chanvre

    Directory of Open Access Journals (Sweden)

    Morin Odile

    2015-11-01

    Full Text Available Les huiles de lin et de chanvre appartiennent à la famille des huiles riches en acides gras polyinsaturés contenant de l’acide alpha-linolénique (ALA. Le contexte actuel du déficit d’apport en ALA, précurseur indispensable des AGPI de la série des omégas 3 (ou n-3, comme en ses dérivés métaboliques supérieurs (EPA, DHA, fonde le regain d’intérêt pour les sources apportant le précurseur de ces acides gras essentiels. Les autorisations de commercialisation de l’huile de chanvre ou l’évolution réglementaire dans le cas de l’huile de lin en France, ont tenu compte de cet atout nutritionnel pourvu que les conditions de stabilité en conservation soient garanties.

  5. Réglementations sur l’étiquetage et la présentation des huiles d’olive

    OpenAIRE

    Pouyet Brigitte; Ollivier Véronique

    2014-01-01

    L’huile d’olive est uniquement obtenue à partir du fruit de l’olivier (Olea europaea L.). Elle est mise sur le marché en respectant les dénominations et définitions suivantes : l’huile d’olive vierge est obtenue directement des olives, uniquement par des procédés mécaniques, éventuellement physiques et notamment thermiques, à condition qui n’altèrent pas l’huile. L’huile d’olive vierge ne doit subir d’autre traitement que le l...

  6. Utilisation des Techniques Ultrasonores pour le Contrôle de la Qualité des Huiles Alimentaires

    OpenAIRE

    Aouzale, Noureddine; Chitnalah, Ahmed; Jakjoud, Hicham

    2010-01-01

    National audience; L'huile d'Argan et l'huile d'olive sont parmi les huiles naturelles les plus connues pour leurs avantages nutritionnels et leur impact positif sur la santé humaine. De ce fait, elles sont très demandées dans le marché et leurs prix ne cessent d'augmenter. Cependant ce domaine n'est pas à l'abri des duperies puisqu'il y a des commerçants qui mélangent ces huiles avec de l'huile de table pour réaliser des profits élevés. Notre objectif dans ce travail est d'utiliser un systèm...

  7. Les effets « santé » de l’huile d’olive

    OpenAIRE

    Saillard Morgane

    2014-01-01

    Les huiles d’olives bénéficient d’une forte image santé auprès des consommateurs. Pourtant il y a peu d’allégations nutritionnelles et de santé autorisées par la Commission pour ces huiles. On peut citer par exemple « riche en acides gras insaturés », « riche en vitamine E » ou des allégations plus élaborées telles que «Les polyphénols présents dans l’huile d’olive contribuent à protéger les lipides sanguins contre le stress oxydatif» ou ...

  8. Huile d’olive et santé osseuse

    Directory of Open Access Journals (Sweden)

    Coxam Véronique

    2014-09-01

    Full Text Available L’ostéoporose représente un problème majeur de santé. La prise en charge classique de cette pathologie, essentiellement curative, est destinée aux personnes qui ont exprimé la maladie. Une telle stratégie ciblant la personne âgée souffrant d’ostéoporose sévère s’avère trop tardive. En fait, le traitement idéal de l’ostéoporose, pour être efficace, doit être oral, dénué d’effet secondaire, et surtout précoce de façon à inhiber très en amont le processus de perte osseuse. C’est pourquoi les stratégies de prévention visant à réduire les risques d’ostéoporose doivent être développées et instaurées. Ainsi, le concept d’une alimentation saine, fournissant des quantités suffisantes de différents nutriments potentiellement ostéoprotecteurs, mérite d’être mentionné. Dans cette optique, les olives ou l’huile d’olive vierge sont des aliments fonctionnels intéressants qui, en plus de leur richesse en acides gras mono-insaturés (acide oléique, contiennent plusieurs composants polyphénoliques ayant des propriétés biologiques spécifiques. Ils pourraient ainsi constituer des éléments efficaces pour prévenir l’ostéoporose, comme en témoignent les données de la littérature.

  9. Caractérisation des huiles de sept variétés d’olivier tunisiennes

    Directory of Open Access Journals (Sweden)

    Abaza Leïla

    2002-03-01

    Full Text Available L’oliveraie tunisienne est riche en variétés, mais en dépit de cette richesse, aucune évaluation biochimique des huiles issues de ces variétés n’a été entreprise jusqu’à l’heure actuelle. C’est pourquoi nous procédons dans le présent travail à l’étude de la composition chimique des huiles de sept variétés à huiles cultivées en Tunisie. Outre la caractérisation variétale, cette étude a pour objectif l’amélioration de la qualité de nos huiles par le choix de variétés performantes du point de vue de la composition chimique de l’huile, pour répondre aux exigences du marché international relatives à la norme commerciale. Dans ce premier travail, nous nous intéressons à la composition de l’huile en acides gras et espèces moléculaires de triacylglycérols. Notre étude confirme qu’aussi bien la teneur en huile des olives que la composition en acides gras et triacylglycérols des huiles sont étroitement liées à la nature du cultivar. Parmi les variétés étudiées, la Sayali et la Chemchali se distinguent par un rendement élevé en huile, supérieur à 50%. Ces deux variétés possèdent les taux les plus élevés en acide oléique (82 et 71% et les taux les plus bas en acide linoléique (respectivement 4 et 10%. Elles possèdent aussi les taux les plus faibles de trilinoléine, respectivement 0,05 et 0,19%. Par conséquent, les huiles de ces deux variétés sont à recommander pour des coupages permettant de corriger la composition chimique des huiles des autres variétés

  10. Variabilité de la composition organique des huiles essentielles extraites d’organes de Monodora tenuifolia provenant de trois sites de récolte en Côte d’Ivoire

    National Research Council Canada - National Science Library

    Zana Adama Ouattara; Yves-Alain Bekro; Marc Gabin Dje Bi; Janat Akhanovna Mamyrbekova-Bekro; Guy Roger Mida Kabran; Amani Brice Kadja

    2016-01-01

    ...) provenant de trois sites de récolte en Côte d’Ivoire, ont été analysés par GC-MS. Les rendements et la composition chimique des HE obtenues par hydrodistillation, varient en fonction des organes de la plante...

  11. Dosage direct du cuminaldéhyde dans l’extrait de Cumin et d’anisaldéhyde dans l’huile essentielle d’Anis vert par spectrométrie IRTF

    Directory of Open Access Journals (Sweden)

    BOUZIDI N.

    2014-11-01

    Full Text Available Direct Determination of cuminaldehyde in Cumin and anisaldehyde in the essential oil of anise green by FTIR spectrometry Analytical method was developed for the direct Determination of cuminaldehyde in Cumin and anisaldehyde in the essential oil of green anise by using FTIR spectrometry. The determination of compounds was carried out by considering the specific band 1097 cm-1 corrected with a baseline established between 957 -1325 cm-1 for cuminaldéhyde ( rate in cumin 40.75%. and 1216 cm-1 corrected between 658 - 1792 cm-1 for anisaldéhyde ( rate in EO of green anise 0.14%.

  12. Efficacité des huiles essentielles d'Eucalyptus camaldulensis et de Cymbopogon citratus dans la protection des stocks de riz contre Sitophilus oryzae (Coleoptera: Curculionidae) et Sitotroga cerealella (Lepidoptera: Gelechiidae)

    OpenAIRE

    Togola, A.; Silvie, Pierre; Seck, P.A.; Menozzi, P.; Nwilene, F. E.; Glitho, I.A.; Chougourou, D.

    2014-01-01

    L'augmentation de la production rizicole en Afrique Subsaharienne et la recrudescence conséquente des ravageurs de stocks tels que Sitophilus oryzae et Sitotroga cerealella nécessitent des actions d'accompagnement de la recherche afin de préserver la qualité et la quantité des récoltes entreposées. Les méthodes de lutte les plus largement utilisées en milieu paysan dans le cadre de la protection des stocks sont les méthodes chimiques. Il apparaît nécessaire de développer de nouvelles mesures ...

  13. Les effets « santé » de l’huile d’olive

    Directory of Open Access Journals (Sweden)

    Saillard Morgane

    2014-09-01

    Full Text Available Les huiles d’olives bénéficient d’une forte image santé auprès des consommateurs. Pourtant il y a peu d’allégations nutritionnelles et de santé autorisées par la Commission pour ces huiles. On peut citer par exemple « riche en acides gras insaturés », « riche en vitamine E » ou des allégations plus élaborées telles que «Les polyphénols présents dans l’huile d’olive contribuent à protéger les lipides sanguins contre le stress oxydatif» ou « Le remplacement de graisses saturées par des graisses insaturées dans le régime alimentaire contribue au maintien d’une cholestérolémie normale ». D’autres effets santé bénéfiques ont pu être mis en évidence dans le régime méditerranéen grâce à certaines études : par exemple l’amélioration des fonctions cognitives (projet COGINUT ou des fonctions cardiovasculaires (étude PREDIMED, sans toutefois avoir d’allégations autorisées correspondantes. Des recherches supplémentaires sont nécessaires pour mieux comprendre le rôle de l’huile d’olive (et sa composition en acides gras et polyphénols dans ces fonctions.

  14. La filière huile d’olive en Tunisie

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    Gharbi Ines

    2014-03-01

    Full Text Available L’olivier a façonné, au fil des millénaires, les paysages, l’histoire, la culture et la gastronomie du bassin méditerranéen qui est encore aujourd’hui le cœur productif et commercial de l’huile d’olive. La Tunisie est le pays oléicole le plus important du Sud de la Méditerranée. Si l’on exclut l’Union européenne, la Tunisie est la plus grande puissance mondiale dans le secteur de l’huile d’olive, déployant de grands efforts de restructuration, de modernisation et d’amélioration de la qualité de ses huiles, accompagnés d’une considérable expansion de surfaces. L’enjeu sera pour la Tunisie d’assurer un ajustement permanent de sa politique oléicole et d’élaborer et mettre en œuvre des stratégies concurrentielles lui permettant de profiter de ces nouvelles opportunités et de renforcer sa compétitivité. La présente étude, qui s’insère dans le cadre de cette préoccupation, a pour objectif d’affiner cette connaissance. Elle se propose d’étudier la filière huile d’olive tunisienne et les possibilités d’amélioration de ses performances.

  15. Oil and Gas Prospects in Egypt Recherches d'huile et de gaz en Égypte

    Directory of Open Access Journals (Sweden)

    El Ayouti M. K.

    2006-10-01

    and gas pools mainly vvithin the Upper and Lower Cretaceous. Recent advances in seismic techniques are helping in locating deeper structures, which might prove instrumental in the upgrading of the oil possibilites of the region. At present, the exploration activities are going on in the different oil and gas provinces in Egypt. These activilles are expected to increase and are also expected to expand to new areas in the eastern part of the Gulf of Suez Basin, offshore and onland, in Northern Sinai and in the Offshore Mediterranean. These new areas are believed to house very good prospects which will be tested not before long. It is also hoped that progress in seismic tools and techniques will add to the possibilities of finding more oil and gas. On connaît des accumulations d'huiles depuis 1868, quelque 10 ans après le célèbre puits de Drake en Pennsylvanie (août 1859. Ces accumulations ont été trouvées comme des suintements dans des tunnels forés pour l'extraction du soufre dans la région de Gemsa sur la côte ouest du golfe de Suez. Depuis cette époque, les activités d'exploration se sont poursuivies à travers une longue histoire d'opérations qui témoignaient des derniers développement dans les outils et les techniques. Jusqu'à maintenant, la principale province à huile d'Egypte est le bassin du golfe de Suez où la majorité des réserves ont été trouvées. D'autres provinces à hydrocarbures sont le bassin du delta du Nil, celui d'Abu Garadig et la ride d'El Alamein, les deux derniers situés dans le désert occidental. Il y a eu trois importantes découvertes de gaz dans le delta du Nil, dont deux en mer, en plus de quelques indices de gaz encore non commerciaux. Outre les découvertes mentionnées, les activités d'exploration au cours de cette longue période ont apporté une masse d'informations géologiques et géophysiques qui ont contribué largement à la connaissance géologique de l'Egypte, et en particulier à la géologie p

  16. Formulation d’une huile d’olive de bonne qualité

    Directory of Open Access Journals (Sweden)

    Haddam Malika

    2014-09-01

    Full Text Available Pour améliorer la qualité d’huile d’olive de la variété « Arbequine », de plus en plus plantée dans les vergers marocains, nous avons réalisé, dans le présent travail, différents assemblages de cette variété avec deux autres connues pour leur qualité supérieure en termes de stabilité, critères organoleptiques et richesse en antioxydants naturels. Ce sont la variété « Picholine marocaine » et la variété d’Espagne « Picual ». La récolte des trois variétés d’olive a été réalisée au mois de décembre 2012 après vérification de la période optimale par calcul de l’indice de maturité qui est proche pour les trois variétés (de 2,9 à 3,3. Après extraction dans une unité de trituration moderne à deux phases, les analyses physico-chimiques et organoleptiques, selon les critères cités dans le Conseil Oléicole International (COI, des trois huiles ont été réalisées et ont permis de classer les trois huiles dans la catégorie Vierge Extra. Les analyses suivantes ont été réalisées sur les trois variétés d’huiles : composition en acides gras (AG et teneur en antioxydants naturels tels que les orthodiphénols et les tocophérols. La vérification de la stabilité à l’oxydation a été réalisée par le test Rancimat. Différents assemblages ont été effectués et ont été soumis aux mêmes analyses. Les résultats révèlent que la formulation la plus réussie est celle présentant 40 % « Arbequine », 30 % « Picholine marocaine » et 30 % « Picual », ayant une stabilité à l’oxydation la plus élevée (23,1 h, due à sa faible teneur en acides gras polyinsaturés et sa teneur augmentée en gamma tocophérol (2,3 mg/100 g d’huile et en orthodiphénols (3,3 mg/100 g d’huile.

  17. Recovery of Waterflood Residual Oil Using Alkali, Surfactant and Polymer Slugs in Radial Cores Récupération d'huile résiduelle par injection d'eau améliorée de produits alcalins, de tensio-actifs et de polymères dans des carottes radiales

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    Nasr-El-Din H. A.

    2006-11-01

    Full Text Available An experimental study has been conducted to examine mobilization and recovery of waterflood residual oil in radial cores. Alkali, surfactant, and polymer slugs of various compositions, sizes and sequences were tested. Core flood experiments were conducted with unfired radial Berea sandstone disks at a flow rate of 8 cm3/h. David Lloydminster crude oil (total acid number of 0. 45 mg KOH/g oil was used. The results of the present work showed that the composition and sequence of the injected chemical slug play an important role in mobilization and recovery of residual oil. For slugs lacking either mobility control, or low interfacial tension, no oil bank was formed and tertiary oil recovery was less than 20% Sor. A significant oil bank and tertiary oil recovery up to 70 % Sor were obtained with slugs having mobility control and low interfacial tension. However, maximum oil cut, incre-mental oil recovery and surfactant propagation were found to be functions of the alkali content in the slug. The incremental oil recovery, oil cut and slug injectivity greatly improved as the alkali concentration (sodium carbonate in the combined slug was increased. A slight delay in surfactant breakthrough and a significantly slower rate of surfactant propagation were observed at higher sodium carbonate concentrations. Une étude expérimentale ayant pour but d'examiner la mobilisation et la récupération assistée d'huile résiduelle, à la suite d'un déplacement par l'eau en milieu poreux, a été conduite. Des bouchons de produit alcalin, de surfactant et de polymère, ayant des compositions, grosseurs et séquences d'injection variées, furent essayés. Les déplacements en milieu poreux furent conduits en utilisant des carottes de grès berea (non traités à haute température et un débit de 8,0 cm3/h. Pour ce faire, on utilisa de l'huile de David Lloydminster (ayant un nombre acide de 0,45 mg KOH/g d'huile. Les résultats de ce travail ont démontré que la

  18. EXTRACTION DE L’HUILE À PARTIR DU GRIGNON D’OLIVE AVEC LE MELANGE : ACETONE – TRICHLOROETHYLENE

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    R MOUSSAOUI

    2005-06-01

    teneurs en insaponifiables et en phospholipides. L’analyse par chromatographie en phase gazeuse montre que les huiles extraites sont riches en acides gras insaturés et sont composées principalement d’acide oléique

  19. Amélioration de la qualité nutritionnelle des huiles de poissons

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    Turon Fabrice

    2004-03-01

    Full Text Available Il a été démontré ces dernières années que les deux acides gras essentiels eicosapentaénoïque (EPA et docosahexaénoïque (DHA, ont des propriétés physiologiques intéressantes chez l’homme. Ces effets bénéfiques ont accru l’intérêt de pouvoir disposer de préparations « ciblées », c’est-à-dire enrichies soit en EPA soit en DHA, les premières visant des applications en prophylaxie des maladies cardiovasculaires, les secondes visant à compléter l’alimentation de sujets risquant de présenter un déficit (prématurité et sénescence. Dans cette mise au point sur le biofaçonnement des huiles de poissons, nous nous attacherons à comprendre les avantages et les limites des méthodes mises en œuvre pour différencier l’EPA du DHA des huiles de poissons.

  20. Additifs anticongelants pour huiles de moteurs Antifreezing Additives for Motor Oils

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    Denis J.

    2006-11-01

    Full Text Available Cet article présente d'abord les principales familles chimiques d'additifs de congélation. Les paraffines normales restant dans l'huile après le déparaffinage cristallisent à basse température sous forme de fines lamelles constituées de plusieurs couches de molécules accolées, qui se superposent en spirales. Ces lamelles s'enchevêtrent en bloquant l'écoulement de l'huile. Les additifs s'interposent, soit par adsorption, soit par cocristallisation en favorisant la croissance des lamelles en épaisseur, ce qui les rend moins aptes à l'enchevêtrement. This article begins by describing the main chemical families of pour-point depressant additives. The normal paraffins remaining in the oil after dewaxing crystallize at low temperature in the form of very thin platelets made up of several layers of associated molecules that are superposed in spirals. These platelets become entangled and prevent the flow of oil. Additives work either by adsorption or by cocrystallization, enhancing the growth of lamella thickness, thus making them less capable of becoming entangled.

  1. Diffusion variétale du palmier à huile (Elaeis guineensis Jacq.

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    Durand-Gasselin Tristan

    2000-03-01

    Full Text Available La productivité du palmier à huile au cours du siècle passé a connu une croissance importante où l’amélioration génétique a pris une large part. Elle a connu un rythme de croissance assez comparable à celui obtenu pour des plantes annuelles de pays tempérés (blé, maïs, tournesol, etc.. Il est possible de dégager les étapes importantes qui ont marqué l’histoire de l’amélioration. Après une assez longue période de sélection massale, l’exploitation du gène « shell », dont l’hérédité a été découverte par Beirnaert en 1939, a apporté une amélioration de 30% [1]. Vers 1960, l’exploitation de l’hétérosis des croisements inter-origines apporte une nouvelle amélioration de 10% environ [2]. Enfin, deux cycles de sélection récurrente ont été achevés par différentes équipes et chacun a apporté 12 à 18% d’amélioration de la productivité. En 1991, la valeur moyenne des semences commerciales, plantées dans de bonnes conditions, était proche de 6,7 tonnes d’huile par hectare et par an [3]. Aujourd’hui, elle est de l’ordre de 7,2 t/ha/an [4]. Ces gains quantitatifs ont été accompagnés de progrès qualitatifs importants comme la diminution de la vitesse de croissance, l’augmentation du pourcentage d’huile dans les régimes ou l’acquisition d’une forte résistance à la fusariose en Afrique de l’Ouest [5]. La qualité du futur matériel végétal devrait être sensiblement améliorée par l’utilisation d’une base génétique élargie dans les programmes d’amélioration [6]. En effet, les stations de recherche disposent d’une bonne diversité génétique rassemblée lors de nombreuses prospections réalisées en Afrique (pour E. guineensis et sur une espèce apparentée en Amérique latine (pour E. oleifera. Ces collections apportent de nouveaux caractères de qualité de l’huile, de résistance à la fusariose, qui sévit en Afrique, ou à la pourriture du cœur en Am

  2. Risques et incertitudes sur le marché mondial des huiles de palme, palmiste et coprah

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    Voituriez Tancrède

    2000-01-01

    Full Text Available Nous essayons dans cet article de fournir les grandes caractéristiques du marché mondial des huiles végétales, avec l’intention tout d’abord de décrire la contribution des oléagineux pérennes et son évolution dans la production et le commerce mondial des huiles, puis de comprendre la nature particulière des risques attachés à ces cultures. À partir de données historiques couvrant la presque totalité du siècle, nous verrons que la situation actuelle est une situation d’incertitude : la part des oléagineux pérennes dans l’échange stagne après avoir connu un cycle de vingt années de croissance, tandis que les deux risques fondamentaux que sont l’exposition aux fluctuations des prix mondiaux (on n’arrache pas ses arbres au gré des baisses de cours et la rigidité de la productivité du travail (on ne sait pas mécaniser de manière satisfaisante la collecte des fruits ne trouvent pas de solution satisfaisante. La première partie aborde ces points. Nous reviendrons dans un deuxième temps sur un exemple réussi de couverture du risque, dans le cas de l’huile de palme, avec l’exemple malaysien qui prouvera que des stratégies nationales de gestion de risque peuvent être efficaces, sinon indispensables, et complémentaires du développement d’initiatives privées. Qu’en est-il de l’Afrique et quelle est l’ampleur des risques et des contraintes qu’y rencontrent les cultures oléagineuses pérennes : ce sont les deux questions qui occuperont notre troisième et dernière partie, en réponse desquelles seront décrits la convention de Lomé et ses effets sur la production et le commerce oléagineux sur le continent africain. Nous conclurons sur l’opportunité pour l’Afrique d’augmenter ses parts de marché nationales et internationales à la lumière des éléments apportés dans les trois parties de cet article.

  3. L’économie mondiale de l’huile d’olive

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    Barjol Jean-Louis

    2014-09-01

    Full Text Available Bien qu’elle ne contribue qu’à environ 3 % du marché mondial des huiles végétales alimentaires, l’huile d’olive fait l’objet d’un intérêt croissant de la part de nouveaux pays, notamment grâce aux résultats des recherches scientifiques qui confirment les caractéristiques positives de cet «or liquide» et sa place fondamentale dans la diète méditerranéenne. Cet intérêt se traduit par une transformation de la structure de la production et une concurrence plus forte entre les pays producteurs : derrière le géant espagnol et les producteurs traditionnels se trouvent désormais de nouveaux pays, producteurs de dernière génération qui recherchent une rentabilité maximum. L’évolution parallèle des circuits commerciaux d’approvisionnement reflète également un changement profond de la structure du marché mondial. L’offre encore trop atomisée et la pression de la demande extrêmement concentrée de la grande distribution donnent lieu à un niveau de prix particulièrement bas et préoccupant, de nature à remettre en question la rentabilité de cette production agricole dans les zones rurales les moins compétitives où elle joue un rôle si important.

  4. Étude des acides gras de huile de fruit de pistachier de l’Atlas algérien

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    Yousfi M.

    2003-09-01

    Full Text Available Les principales constantes chimiques d’huile de fruit de pistachier de l’Atlas ont été déterminées par des méthodes chimiques simples normalisées. La composition en acides gras totaux et libres de cette huile a été déterminée par chromatographie en phase gazeuse. Les acide gras libres ont été obtenus par leur fixation sur résine. L’analyse des esters méthyliques des acides gras effectuée sur une colonne capillaire imprégnée de DB. Wax de 60 mètres de longueur, montre chez cette espèce une prédominance des acides gras oléique, linoléique et palmitique. Les acides gras libres et totaux sont de même nature.

  5. Étude des acides gras de huile de fruit de pistachier de l’Atlas algérien

    OpenAIRE

    Yousfi M.; Nedjemi B.; Belal R.; Ben Bertal D.

    2003-01-01

    Les principales constantes chimiques d’huile de fruit de pistachier de l’Atlas ont été déterminées par des méthodes chimiques simples normalisées. La composition en acides gras totaux et libres de cette huile a été déterminée par chromatographie en phase gazeuse. Les acide gras libres ont été obtenus par leur fixation sur résine. L’analyse des esters méthyliques des acides gras effectuée sur une colonne capillaire imprégnée de DB. Wax de 60 mètres de longueur, montre chez cette espèce une pré...

  6. Observations on the Primary Migration of Oil in the la Luna Source Rocks of the Maracaibo Basin, Venezuela Observations de la migration primaire de l'huile dans les roches mères de la Formation de La Luna dans le bassin de Maracaïbo, Venezuela

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    Talukdar S.

    2006-11-01

    Full Text Available In the present work, an integrated approach has been made to understand the primary migration of oil in the organic-rich, oil prone, predominantly carbonate source rocks of the La Luna Formation of the Maracaibo Basin. Geochemical data on source rock extracts and the simulation of oil generation by hydrous-pyrolysis experiments indicate that the primary migration and expulsion of oil began at an early stage of thermal maturity and that the bulk oil expulsion at peak generation could have been as high as 75%. Fluorescence and transmitted light petrography of the source rocks at different maturity levels show the dominant mode of oil expulsion through microfractures. It is interpreted from the geochemical and geological data that the primary migration of oil in the La Luna source rocks took place as a separate oil phase through microfractures caused by the excess fluid pressure due to hydrocarbon generation. The oils expelled from the La Luna source are enriched in saturated hydrocarbons and depleted in resins + asphaltenes compared to the La Luna rock extracts. However the distributions of n-alkanes, in the oils and the rock extracts are very similar, which suggest that fractionation of the n-alkanes did not occur during the primary migration. In the Maracaibo Basin, updip lateral primary migration of oil within the La Luna source system seem to have occurred for a considerable distance. Local internal migration has been observed at a relatively early stage of maturity. Cette étude consiste en une approche intégrée cherchant à comprendre la migration primaire de l'huile dans les roches mères de la Formation de La Luna dans le bassin de Maracaïbo, riches en matière organique, génératrices d'huile et à dominante carbonatée. Les données géochimiques sur des extraits de roches mères et la simulation de genèse d'huile par des expériences de pyrolyse en présence d'eau indiquent que la migration primaire et l'expulsion de l'huile ont

  7. Evaluation de la neutralité organoleptique des huiles raffinées à l’aide d’un nez électronique

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    Vigneron Pierre-Yves

    2002-07-01

    Full Text Available Aucune technique analytique ne permet d’évaluer en contrôle industriel si une huile raffinée est de goût neutre c’est à dire dépourvue d’un goût spécifique. La détermination des composés volatils totaux par chromatographie en phase gazeuse de l’espace de tête ne parvient pas à répondre à ce problème puisque cette technique bien que rapide donne des résultats qui ne sont pas corrélés avec la note globale donnée par un panel de dégustation. Les nez électroniques équipés de semi-conducteurs donnent des résultats encourageants dans le cas des huiles de tournesol mais les capteurs actuellement disponibles sont insensibles aux flaveurs de certaines huiles comme les huiles de colza. Quoique de tels équipements ne puissent remplacer à ce jour l’évaluation sensorielle, ils peuvent être un contrôle complémentaire intéressant pour alléger le Contrôle Qualité quotidien d’une production d’huile raffinée.

  8. Presentation

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    Paulo Henrique Freire Vieira

    2013-12-01

    Full Text Available This dossier focuses on one of the essential debate topics today about the territorial dimension of the new development strategies concerned with the worsening of the global socioecological crisis, that is: the challenges related to the activation and integration in networks of localized agri-food systems. For its composition, some contributions presented and debated during the VI International Conference on Localized Agri-food System - The LAFS facing the opportunities and challenges of the new global context have been gathered. The event took place in the city of Florianópolis, from May 21th to 25th of 2013. The event was promoted by the Federal University of Santa Catarina (UFSC and by the Center for the International Cooperation on Agricultural Research for Development (CIRAD. Besides UFSC and CIRAD, EPAGRI, State University of Santa Catarina (UDESC, as well as research institutes and universities from other states (UFMG, IEA/SP, UFS, UFRGS and Mexican and Argentinian partners from the RED SIAL Latino Americana also participated in the organization of lectures, discussion tables and workshops.

  9. Synthèse d’arômes et désacidification d’une huile acide en milieu sans solvant

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    Karra-chaabouni Maha

    2002-07-01

    Full Text Available La neutralisation partielle de l’huile de grignon a été réalisée par estérification des acides gras libres, catalysé par le lipozyme™ en milieu sans solvant organique et à 40 °C. Le taux d’acidité de cette huile est passé alors de 30 à 13%. Le même enzyme a été utilisé pour synthétiser des arômes naturels en absence de solvant organique.

  10. Presentation

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    Eduardo Vicente

    2013-06-01

    Full Text Available In the present edition of Significação – Scientific Journal for Audiovisual Culture and in the others to follow something new is brought: the presence of thematic dossiers which are to be organized by invited scholars. The appointed subject for the very first one of them was Radio and the invited scholar, Eduardo Vicente, professor at the Graduate Course in Audiovisual and at the Postgraduate Program in Audiovisual Media and Processes of the School of Communication and Arts of the University of São Paulo (ECA-USP. Entitled Radio Beyond Borders the dossier gathers six articles and the intention of reuniting works on the perspectives of usage of such media as much as on the new possibilities of aesthetical experimenting being build up for it, especially considering the new digital technologies and technological convergences. It also intends to present works with original theoretical approach and original reflections able to reset the way we look at what is today already a centennial media. Having broadened the meaning of “beyond borders”, four foreign authors were invited to join the dossier. This is the first time they are being published in this country and so, in all cases, the articles where either written or translated into Portuguese.The dossier begins with “Radio is dead…Long live to the sound”, which is the transcription of a thought provoking lecture given by Armand Balsebre (Autonomous University of Barcelona – one of the most influential authors in the world on the Radio study field. It addresses the challenges such media is to face so that it can become “a new sound media, in the context of a new soundscape or sound-sphere, for the new listeners”. Andrew Dubber (Birmingham City University regarding the challenges posed by a Digital Era argues for a theoretical approach in radio studies which can consider a Media Ecology. The author understands the form and discourse of radio as a negotiation of affordances and

  11. Presentation

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    Helmut Renders

    2008-10-01

    Full Text Available We present to our esteemed readers the second edition of our journal for 2008. We have chosen the theme “The life and work of Prof. Dr. Jürgen Moltmann” as its special emphasis. It is our way to pay homage to J. Moltmann in the year the Universidade Metodista de São Paulo awards him an honorary Doctor Honoris Causa degree. Sincethe seventies, Moltmann and Latin America have been in dialog. In his emblematic work “A Theology of Liberation”, Gustavo Gutiérrez, the Catholic, discussed with Moltmann, the Reformed, the relationship between eschatology and history (GUTIÉRREZ, Gustavo.Teologia da Libertação. 5ª edição. Petrópolis, RJ: Vozes, 1985, p. 27, 137-139. A dialog held in the premises of IMS, which nowadays is called UMESP, has produced the little book “Passion for life” (MOLTMANN, Jürgen. Paixão pela vida. São Paulo, SP: ASTE - Associaçãode Seminários Teológicos Evangélicos, 1978.In the following years, the wide theological work of J. Moltmann went all the way from debates to congresses and has conquered the classrooms. Most probably, J. Moltmann is nowadays the most widely read European author in Brazilian theological seminaries. Thisrecognition can only be held in unison and the wide response to our request for articles confirms the huge repercussion that Moltmann’s work has been having up to today in Brazil. The ecumenical theologian J. Moltmann is ecumenically read. We believe that thisway we may be better equipped to answer to anyone who asks us for the reason there is hope in us. We have organized the articles on J. Moltmann’s theology according to the original publication date of the books dealt with in each essay. We also communicate that some articles which were originally requested for this edition of the journal will be published in the journal Estudos de Regilião in May 2009.As it is usual with the journal Caminhando, we have, besides this thematic emphasis, yet other contributions in the areas of

  12. Filière huile de palme au Bénin : une dynamique essentiellement artisanale

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    Fournier Stéphane

    2000-03-01

    Full Text Available Après un premier siècle prometteur (de la moitié du xixe siècle à la moitié du xxe siècle, la filière huile de palme béninoise semble actuellement confrontée à un certain nombre de problèmes. Un secteur industriel assez peu développé et un secteur artisanal très peu mécanisé la rendent atypique parmi les autres pays de la sous-région du golfe de Guinée. Cet article se propose de tenter d’expliquer cette situation, en revenant sur les conditions d’évolution de cette filière au Bénin. Dans l’actuel mouvement de relance qu’opèrent gouvernement, centres de recherche nationaux, organisations internationales et ONG, la compréhension des dynamiques internes serait un atout.

  13. Enjeux de la recherche sur le palmier à huile en Afrique

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    Follin Jean-Claude

    2000-03-01

    Full Text Available L’Afrique, qui fournissait 80% des exportations mondiales en 1960, a pratiquement disparu des échanges internationaux. La supériorité des rendements en Asie du Sud-Est, les coûts de production trop élevés pour un produit dont le prix, en monnaie constante, a chuté avec l’expansion des productions asiatiques, des politiques agricoles trop rigides, peu incitatives et manquant de continuité ont fortement contribué à cette chute relative1. Pourtant, l’Afrique n’est pas sans atouts, il existe des pays à fortes potentialités comme le Nigeria et le Congo et un fort engouement des petits paysans pour la culture du palmier à huile dans des pays comme la Côte d’Ivoire, le Cameroun ou même le Bénin où les conditions de culture sont pourtant considérées comme à la limite du possible.

  14. Presentation

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    Nicanor Lopes

    2010-11-01

    Full Text Available The Journal Caminhando debuts with a new editorial format: eachmagazine will have a Dossier.In 2010 Christianity celebrated the centenary of Edinburgh. TheWorld Missionary Conference in Edinburgh in 1910 is regarded by manyas missiological watershed in the missionary and ecumenical movement.So the Faculty of Theology of the Methodist Church (FATEO decidedto organize a Wesleyan Week discussing the issue of mission. For anevent of this magnitude FATEO invited the Rev. Dr. Wesley Ariarajah,Methodist pastor and teacher of Sri Lanka with extensive experience inpastoral ministry in local churches and professor of History of Religionsand the New Testament at the Theological College of Lanka, maintainedby the Protestant Churches in Sri Lanka. In 1981 he was invited to jointhe World Council of Churches, where he presided for over ten years theCouncil of Interreligious Dialogue. From 1992 he served as Deputy GeneralSecretary of the WCC.The following texts are not the speeches of the Rev. Dr. WesleyAriarajah, for they will be published separately. Nevertheless, the journaldialogs with the celebrations of the centenary of Edinburgh, parting formthe intriguing theme: "Mission in the 21st century in Brazil". After all, howis it that mission takes place among us in personal, church, and communityactivities?Within the Dossier, as common to the journal, the textos are organizedas follows: Bible, Theology / History and Pastoral Care. Other items thatdo not fit within the Dossier, but, do articulate mission, can be found inthe section Declarations and Documents and Book Reviews.The authors of the Dossier have important considerations in buildinga contemporary missiological concept considering Brazilian reality.Anderson de Oliveira, in the Bible-Section, presents a significantexegeses of Matthew 26.6-13. What does it mean when Jesus is quotedwith the words: "For the poor always ye have with you, but me ye havenot always." Is this declaration challenging the gospels

  15. Les huiles d’olive vierges françaises : évolution, état des lieux

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    Pinatel Christian

    2014-09-01

    Full Text Available La production française d’huiles d’olive vierges bien que très modeste (environ 5000 T par rapport à la production mondiale (0,22 %, présente une originalité et une diversité de caractéristiques notamment organoleptiques. Cette diversité se retrouve dans les huit Appellations d’Origine françaises existantes actuellement qui représentent environ 30 % de la production nationale. La production en agriculture biologique, actuellement de l’ordre de 15 %, progresse. Le suivi des indices de qualité (acidité, indice de peroxyde, absorption spécifique en UV K232 et K270, éthyl esters, analyse organoleptique montre une amélioration constante de la qualité des huiles d’olive vierges qui sont conformes aux normes internationales. Toutefois, quelques échantillons présentent des valeurs de K270> 0,22, qui ne correspondent pas à un état d’oxydation élevé mais à une forte teneur en composés phénoliques. De plus, certaines productions françaises particulières (huiles « fruité noir », huiles Corse « à l’ancienne » présentent des typicités appréciées d’une partie des consommateurs et qui méritent d’être conservées et pérennisées, malgré leur classification dévalorisante par les critères règlementaires. Les teneurs en composés phénoliques totaux varient fortement en fonction des différents types de fruités ou de type de récolte. Les profils organoleptiques standards des AOP, AOC et des principales variétés françaises sont décrits par des descripteurs analogiques.

  16. Molecular Dynamics Simulation of Spontaneous Imbibition in Nanopores and Recovery of Asphaltenic Crude Oils Using Surfactants for EOR Applications Simulations de dynamique moléculaire d’imbibition spontanée dans des nanopores et pour la récupération d’huiles brutes asphalténiques en utilisant des agents tensioactifs pour des applications d’EOR

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    Stukan M.R.

    2012-12-01

    Full Text Available We present Molecular Dynamics (MD simulations of the imbibition process in nanopores in case of two different mechanisms of the wettability modification. We compare the imbibition of an aqueous surfactant solution into an oil-wet pore driven by surfactant adsorption onto the oil-wet rock surface (coating mechanism and the imbibition of an aqueous surfactants solution driven by surfactants removing the contaminant molecules from the originally water-wet surface (cleaning mechanism. Our results show qualitative difference in the imbibition dynamics in these two cases and indicate that MD simulation is a useful tool to investigate details of the imbibition mechanisms at the pore scale with direct implications for Enhanced Oil Recovery (EOR operations. Nous presentons des simulations de Dynamique Moleculaire (DM du processus d’imbibition dans des nanopores dans le cas de deux mecanismes differents de modification de mouillabilite. Nous comparons l’imbibition d’une solution aqueuse d’agent tensioactif dans un pore mouille d’huile entrainee par une adsorption d’agent tensioactif sur la surface de roche mouillee d’huile (mecanisme de revetement et l’imbibition d’une solution aqueuse d’agent tensioactif entrainee par des agents tensioactifs eliminant les molecules contaminantes de la surface originellement mouillee d’eau (mecanisme de nettoyage. Nos resultats montrent une difference qualitative en matiere de dynamique d’imbibition dans ces deux cas et indiquent que la simulation de DM constitue un outil utile pour etudier les mecanismes d’imbibition a l’echelle des pores avec des implications directes pour des operations de recuperation renforcee d’huile (EOR, Enhanced Oil Recovery.

  17. Impact de la trituration et du raffinage sur la teneur en micronutriments des huiles végétales de colza, soja et tournesol

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    Régis Jennifer

    2016-05-01

    Full Text Available Majoritairement constituées de triglycérides et de leurs acides gras, les huiles végétales contiennent également entre 1 et 5 % de micronutriments tels que les tocophérols, les phytostérols, les polyphénols et les coenzymes Q. Naturellement présents dans les graines de colza, soja et tournesol, ces composés sont connus pour leurs effets bénéfiques sur la santé. Leur transfert et leur préservation de la graine jusqu’à l’huile apparaissent dès lors comme primordiaux. Pourtant, une grande part de ces micronutriments est partiellement à totalement détruite au cours des procédés de trituration et de raffinage conventionnels. La préparation des graines (aplatissage, broyage, cuisson, l’extraction par solvant et le raffinage des huiles (neutralisation, décoloration et désodorisation sont, en effet, autant d’étapes qui ont une influence significative sur les teneurs en constituants mineurs des huiles brutes et raffinées. Des travaux visant à démontrer l’efficacité de différentes méthodes alternatives ont dès lors été conduits.

  18. Etude des phénomènes de pré-claquage et claquage de l'huile végétale à base de Jatropha Curcas comme substitut à l'huile minérale dans les équipements électriques haute tension

    OpenAIRE

    SITORUS, Henry-B-H; Beroual, Abderrahmane; Setiabudy, Rudy; Bismo, Setijo

    2014-01-01

    Cet article porte sur une étude comparative d'une huile végétale à base de jatropha curcas (VO) et de l'huile minérale (MO) sur la base des tensions de claquage et des caractéristiques de génération et de propagation des streamers qui s'y développent. Nous montrons que les tensions de claquage de ce produit naturel et de l'huile minérale, déterminées selon la norme CEI 60156 et CEI 60897 en alternatif, continue et impulsionnel (choc foudre 1,2/50 μs) sont très proches. Aussi, les longueurs fi...

  19. Le potentiel en huile des charbons : une approche géochimique The Oil Potential of Coals: a Geochemical Approach

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    Durand B.

    2006-11-01

    Full Text Available La pyrolyse Rock-Eval et la chromatographie des effluents de pyrolyse de charbons de tous âges géologiques montrent qu'ils produisent jusqu'à 20 % de leur poids d'hydrocarbures. Ces hydrocarbures sont surtout des hydrocarbures liquides (C+5 jusqu'à un rang correspondant à environ 1,5 % de pouvoir réflecteur de la vitrinite. C'est pourquoi des quantités appréciables d'huile devraient être formées au cours de la houillification de la plupart des charbons, quel que soit l'âge de leur dépôt. L'absence quasi générale de gisements d'huile dans les séries à charbons paléozoïques serait donc due à des facteurs géologiques et non des caractères géochimiques particuliers. Dans ces séries anciennes, l'huile formée a probablement été dissipée par migration au cours des cycles sédimentaires successifs. A rang égal, la variabilité des quantités et des distributions des hydrocarbures formés par pyrolyse est aussi grande pour les charbons que pour les autres types de matière organique. Rock-Eval pyrolysis and the chromatography of pyrolysis effluents from coals of all geological ages show that such coals produce up to 20% of their weight in hydrocarbons. These hydrocarbons are mainly liquid hydrocarbons (C+5 up to a rank corresponding to about 1,5% of the reflecting power of vitrinite. This is why appreciable quantities of oil should be formed during the coalification of most coals, no matter what their age of deposition may be. The quasi general absence of oil accumulations in Paleozoic coal series should thus be due to geological factors and not to specific geochemical features. The oil formed in such ancient series was probably dissipated by migration during successive sedimentary cycles. For equal rank, the variability of the amounts and distributions of hydrocarbons formed by pyrolysis is just as great for coals as for other types of organic matter.

  20. Thermal Evolution of Crude Oils in Sedimentary Basins: Experimental Simulation in a Confined System and Kinetic Modeling Evolution thermique des huiles dans les bassins sédimentaires : simulation expérimentale par pyrolyse en milieu confiné et modélisation cinétique

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    Behar F.

    2006-11-01

    Full Text Available A detailed knowledge of the cracking mechanisms of crude oils should highly improve the understanding of geochemical reactions involved in hydrocarbon degradation into lighter oil and gas and consequently the applicability of kinetic models currently used for prediction of gas formation. Although the mechanisms of cracking are well known for several model compounds or simple mixtures, there is, to date, no available method to model complex mixtures, especially when they contain heavy compounds, except by using empirical approaches. During thermal cracking, oil will produce both lighter and heavier molecules than those present in the initial sample. Thus, the pyrolysate will be a mixture of both new compounds and compounds not yet degraded. In order to discriminate between reactants and products, we have chosen to fractionate each oil into two classes : the first one (distillate 300- comprising light hydrocarbons ranging from C6 to C16 the second one (residue 300+ comprising both hydrocarbons and polar compounds. For simulation of thermal evolution of crude oils, about 100 experiments were carried out on two oils (Boscan and Pematang, in a closed pyrolysis system, over a wide range of heating times (few minutes to 1 month and temperatures (335 to 500°C. The pyrolysate is represented by 10 chemical fractions (C1, C2, C3-C5, C6-C13 saturates, benzene + toluene + xylenes + naphthalene, C9-C13 alkyl aromatics, C14+ saturates, C14+ condensed aromatics, C14+ alkyl and/or naphtheno aromatics + resins + asphaltenes and coke. For kinetic modeling, the degradation of each fraction, except for C1, C6-C13 aromatic mixture comprising benzene, toluene, xylenes and naphthalene, and coke considered as stable compounds, is described by a balanced elementary reaction governed by first order kinetics and obeying Arrhenius law. For a given oil, the kinetic parameters of the model (apparent activation energies Ei, preexponential factor A and stoichiometric

  1. Détermination de l’acidité et de l’indice de peroxyde dans les huiles d’olive vierges et dans les huiles raffinées par spectrométrie proche infrarouge à transformée de Fourier

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    Lagardere Lionel

    2004-01-01

    Full Text Available La technique spectroscopique proche infrarouge à transformée de Fourier (PIR-TF a été mise en œuvre pour la détermination de l’indice de peroxyde (IP et de l’acidité oléique d’huiles d’olive vierges et pour la détermination de l’IP d’huiles de tournesol. Les modèles de calibrage ont été réalisés en utilisant la régression des moindres carrés partiels (Partial Least Squares, PLS sur différentes régions spectrales. Les meilleurs résultats ont été obtenus dans le domaine 5100-4520 cm --1 pour l’évaluation de l’acidité oléique et dans le domaine 7500-6300 cm --1 pour la détermination de l’IP. Les calibrages obtenus pour les huiles d’olive vierges ont permis de « prédire » l’IP avec une incertitude de 1,0 meqO 2\\\\kg sur la gamme 3 à 32 meqO 2\\\\kg et l’acidité oléique avec une incertitude de 0,06 % (m\\\\m sur la gamme 0,15 à 1,3 %. Par ailleurs, l’IP peut être « prédit » avec une incertitude de 1,1 meqO 2\\\\kg dans le domaine 1,5 à 24 meqO 2\\\\kg pour des échantillons d’huiles de tournesol raffinées. En revanche, la mesure indirecte de l’IP sur des huiles raffinées de natures différentes est beaucoup moins performante. Il semble en effet préférable d’effectuer des calibrages par type d’huile. Du fait de sa simplicité et de sa rapidité, la technique PIR-TF est une méthode alternative à la mesure de ces deux indices dans l’industrie des corps gras. Automatisable, elle permet ainsi l’analyse de la qualité des huiles en routine ou en continu.

  2. La consommation urbaine de l’huile de palme rouge en Côte d’Ivoire : quels marchés ?

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    Cheyns Emmanuelle

    2001-11-01

    Full Text Available Au côté d’une extraction industrielle de l’huile de palme dont les débouchés sont l’exportation en Europe et, en Côte d’Ivoire, la seconde transformation en huile industrielle raffinée et produits dérivés (savons, margarines pour un marché ivoirien et sous-régional, il existe un secteur de transformation artisanal de l’huile rouge (et aussi de l’huile de palmiste et de savons qui répond à une demande différenciée des consommateurs ruraux mais aussi urbains. En termes d’équipements de transformation, le secteur artisanal est peu développé (beaucoup moins que dans d’autres pays de la sous-région. L’extraction de l’huile rouge y est soit entièrement manuelle, soit semi-mécanisée : utilisation de presses à vis verticales très simples et peu coûteuses. Les trente dernières années de développement industriel n’ont pas permis à la Côte d’Ivoire de se doter d’équipements semi-industriels ou artisanaux, intermédiaires 2 entre l’usine de 20 ou 40 t/h et la transformation manuelle par les femmes, alors que d’autres pays voisins se sont au contraire dotés de ces équipements [1]. Quoi qu’il en soit, ce secteur artisanal informel, maîtrisé par les femmes (transformation et commercialisation, approvisionne largement les marchés de consommation locaux, ruraux comme urbains, en un produit considéré comme spécifique (que ne fournit pas l’agro-industrie locale et qui semble toujours apprécié des consommateurs. Il nous amène à reconsidérer la filière « palmier à huile » sous l’angle d’une filière dont le produit est aussi « vivrier » (par opposition à produit de « rente » et qui assure un approvisionnement des marchés locaux, via des circuits informels, en répondant à une demande locale. Une première enquête 3 par entretiens approfondis auprès de 28 ménages abidjanais révèle une différenciation de la demande qui s’établit sur la qualité des produits, et qui

  3. Fiches techniques Les triacylglycérols des huiles de graines de quatre Cucurbitacées tropicales des genres Lagenaria et Luffa

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    Grondin Isabelle

    2002-03-01

    Full Text Available Les huiles de graines de quatre Cucurbitacées tropicales de l’île de la Réunion, provenant respectivement de deux variétés de l’espèce Lagenaria leucaritha (calebasses bouteille et la gale et de deux espèces du genre Luffa (pipangailles lisse et à côtes, ont été analysées aussi bien pour la fraction saponifiable que pour la fraction insaponifiable. L’étude de la fraction saponifiable a été consacrée, d’une part, à la détermination de la composition quantitative et qualitative en acides gras des différentes huiles dont les résultats ont fait l’objet d’une publication antérieure [1] et, d’autre part, à celle de leurs triacylglycérols. Une comparaison des compositions en acides gras des deux genres étudiés a permis de mettre en évidence les spécificités propres à chaque genre. Les genres Lagenaria et Luffa, présentant une composition en acides gras qualitativement similaire, contiennent ainsi les AG couramment rencontrés dans le règne végétal, à savoir les acides palmitique, stéarique, oléique et linoléique. Ce dernier est, par ailleurs, l’acide gras majoritaire avec des teneurs supérieures à 50%. La présence de cet acide gras essentiel confère ainsi à ces huiles de bonnes propriétés diététiques et nutritionnelles. Au sein du genre Lagenaria, les huiles des graines des variétés bouteille et la gale se caractérisent par leur teneur élevée en acide linoléique (71,5% pour la variété bouteille, et 81,5% pour la variété la gale. Les huiles de Lagenaria leucaritha sont du type palmitique-linoléique car ces deux acides gras représentent quantitativement plus de 85% des AG totaux. Contrairement à ces deux huiles, celles du genre Luffa se différencient, d’une part, par une teneur moindre en acide linoléique avec 55,3% pour l’espèce Luffa acutangula et 51,2% pour l’espèce Luffa cylindrica. D’autre part, elles sont du type palmitique-oléique-linoléique puisque ces trois

  4. Effet comparé des huiles essentielles de quatre espèces végétales contre la bruche du niébé (Callosobruchus maculatus Fab. et le charançon du riz (Sitophilus oryzae L

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    Gakuru, S.

    1995-01-01

    Full Text Available Compared Effect of Four Plant Essential Oils against Cowpea Weevil Callosobruchus maculatus Fab. and Rice Weevil Sitophilus oryzae L. The aim of this paper is to compare the essential oil effects of Eucalyptus tereticornis Sm., Eucalyptus citriodora Hook, Citrus sinensis (L. Obs. and Ocimum basilicum L. against the cowpea weevil (Callosobruchus maculatus Fab. and the rice weevil (Sitophilus oryzae L. The experiments were conducted in laboratory, in Petri dishes. As nutritive support, we used cowpea and maize grains for respectively C. maculatus and S. oryzae. The Petri dish bottom had a filter paper impregnated with a desired essential oil quantity. The obtained results showed that the tested essential oils were not efficient against S. oryzae. On the other hand, the essential oils of E. citriodora and O. basilicum were very efficient against C. maculatus. The respective LD 50 was 1.26 ml and 1.49 ml in acetone dilution of 2 %.

  5. Comparaison de l'usage d'huiles d'origine végétale ou minérale pour la lubrification de chaines de tronconneuse.

    OpenAIRE

    Bieswal, Marc; Debouche, Charles; Van Belle, Laurent

    2000-01-01

    Des études en laboratoire ont montré que les huiles végétales présentent un pouvoir lubrifiant supérieur aux huiles minérales dans le domaine de la lubrification limite (Kabuya 1995). Par ailleurs, des chiffres avancés dans la littérature ou par des fournisseurs de lubrifiants annoncent la possibilité de réduire la consommation de lubrifiant en passant à un lubrifiant à base d'huile végétale. Des chiffres de réduction d'usure sont aussi avancés par des constructeurs de tronçonneuses. L'essai ...

  6. Huiles usagées : schémas IFP de raraffinage Ifp Flowsheets for Rerefining Used Oils

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    Audibert F.

    2006-11-01

    Full Text Available Tout bailleur de licence de procédés de reraffinage des huiles doit rester averti des multiples problèmes concernant ce sujet. Le schéma proposé doit assurer la flexibilité requise du fait des qualités variables de charges et de la législation sur l'environnement. Les schémas complets proposés par l'Institut Français du Pétrole (IFP comprennent un premier flash, une purification physique en profondeur et une étape de raffinage adaptée à la demande locale. Des détails sont donnés sur chaque séquence ainsi que les analyses des produits. Any licensor must be aware of the problems involved in the rerefining of used ails. The proposed flowsheet should ensure the desired flexibility with regard ta feedstockquality variations and environmental - regulation requirements. The complete flowsheets proposed by Institut Français du Pétrole (IFP include a first flash, an in-depth physical purification and a refining step adapted to the local demands. Details are given for each séquence along with product analyses.

  7. Sources de la chambre de commerce et d’industrie de Marseille sur l’histoire de l’huile d’olive

    OpenAIRE

    Courdurie, Marcel

    2013-01-01

    Les archives de la Chambre de Commerce et d’Industrie de Marseille sont particulièrement importantes pour l’étude du commerce de l’huile d’olive du xviiième siècle à nos jours. On y trouve en abondance des renseignements sur la qualité des récoltes, les statistiques des importations et des exportations, l’évolution de la réglementation... Dans la présentation de ces sources, je voudrais insister uniquement sur leur principale originalité, c’est-à-dire la documentation relative au xviiième siè...

  8. ESSAI D'AMÉLIORATION D'EXTRACTION D'HUILE D'OLIVE - ANALYSE PHYSICOCHIMIQUE ET ÉVALUATION SENSORIELLE

    OpenAIRE

    BOUSSAFI, Saliha

    2015-01-01

    an ou4Tfier fe.5per.s'onne8 ayant 6riee êeprés ou de foin afin (['élaEorer ce travdl Résumé — L'huile d'olive est un produit ancestral largement reconnu pour ses effets bénéfiquessur la santé humaine. Sa technique de fabrication a beaucoup évolué au cours du dernier siècle, notamment ces dernières années avec l'automatisation croissante des chaînes de production. La première partie de ce travail fait le bilan de ces différentes évolutions, puis la seconde détaille l'impact de c...

  9. Biodisponibilité de l’acide a-linolénique : intérêt d’une huile combinée

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    Boulos Patricia

    2000-01-01

    Full Text Available L’objectif de notre étude était de comparer la biodisponibilité de l’acide a-linolénique selon qu’il est apporté par l’une ou l’autre des quatre huiles suivantes, de teneur en acide a-linolénique et/ou de structure glycéridique différentes : colza, soja, Isio4 à base de colza (Isio4-colza, le produit actuellement commercialisé et Isio4 à base de soja (Isio4-soja. Pour cela, le taux d’absorption intestinale de l’acide a-linolénique et sa répartition dans les TG et dans la phosphatidylcholine (PC de la lymphe ont été étudiés chez le rat, pris comme modèle animal.

  10. Intérêts des semences commerciales améliorées de palmier à huile (Elæis guineensis Jacq.

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    Cochard Benoît

    2001-11-01

    Full Text Available Le palmier à huile (Elæis guineensis Jacq. est originaire d’Afrique où il est encore exploité de façon traditionnelle. L’intensification de sa culture a commencé au début du xxe siècle, en Asie du Sud-Est. Ce n’est qu’entre les deux guerres mondiales que cette intensification s’est manifestée en Afrique. En Amérique latine, cette culture ne s’est développée que depuis la fin des années 60. En 2000, la production d’huile s’élève à 21,7 millions de tonnes. Par ailleurs, les extensions et renouvellements de plantations demeurent très vifs. Ainsi, les surfaces plantées sont de 6 562 000 hectares dans le monde en 2000 [1]. Dans ces conditions, le marché mondial des semences est estimé à plus de 150 millions de graines par an. Autant les agro-industriels se fournissent le plus souvent auprès des obtenteurs, autant les planteurs villageois, en particulier en Afrique, ne s’adressent pas systématiquement à eux, et sont confrontés à des désagréments ultérieurs, lors de la mise en récolte de leur plantation. Les semences commerciales de qualité prennent en compte des contraintes liées à la biologie florale de cette plante ainsi qu’aux caractéristiques morphologiques de la graine. Elles sont fabriquées en respectant un cahier des charges rigoureux permettant d’éviter aux exploitants de très mauvaises désillusions.

  11. Intérêt nutritionnel des huiles de tournesols : tournesol linoléique et tournesol à haute teneur en oléique

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    Delplanque Bernadette

    2000-11-01

    Full Text Available Depuis les années 60 le tournesol traditionnel représentait le chef de file des « huiles poly-insaturées ». Depuis l’apparition des premières variétés riches en acide oléique (18:1, les sélections naturelles ou traditionnelles de variétés nouvelles de tournesol oléique ont trouvé leur place et leur justification sur le plan nutritionnel, par la qualité diversifiée de leurs acides gras, mais aussi par la préservation des qualités de l’insaponifiable (riche en vitamine E et en phytostérols. Une complémentarité entre les tournesols linoléique et oléique pourrait être tout à fait intéressante par l’utilisation d’huiles combinées, en vue d’un équilibre diététique mono/poly-insaturé dont l’effet serait d’assurer l’expression optimale des paramètres de protection vis-à-vis de l’athérothrombose à l’origine des maladies cardiovasculaires. Le développement du « tournesol-mid-oléique » (mid-range-oleic pourrait également apporter une source d’oléique et de linoléique naturellement plus équilibrée. Cependant, il restera à satisfaire les besoins en alpha-linolénique (importance de la balance n-6/n-3 qui pourraient être apportés par le colza.

  12. Oxydation des huiles de bases minérales d'origine pétrolière. Relation entre leur composition chimique, l'épaississement et la composition de leur produits de dégradation Oxidation of Mineral Base Stocks of Petroleum Origin. Relationship Between Chemical Composition, Thickening and Oxidized Degradation Products

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    Faure D.

    2006-11-01

    Full Text Available Cette étude est basée sur la compréhension des problèmes liés à l'oxydation à haute température des huiles de base utilisées dans la formulation des lubrifiants pour moteurs automobiles. Les huiles étudiées sont d'origines différentes : huile Moyen-Orient et huile mer du Nord, respectivement à fortes et faibles teneurs en composés aromatiques et en soufre, huile hydroisomérisée et polyalphaoléfine, exemptes de ces composés, et huile hydrocraquée de composition intermédiaire. L'influence de la teneur et de la composition en produits aromatiques et en soufre des huiles sur la dégradation thermo-oxydante est montrée. Ces composés protègent naturellement les huiles de base contre l'oxydation, mais deviennent des précurseurs de dépôts dans des conditions d'oxydation sévères, en présence d'un catalyseur, tel le fer, qui est toujours présent dans un moteur. L'action des additifs antioxydants, inhibiteurs radicalaires et décomposeurs d'hydroperoxydes, est étudiée à l'aide d'essais d'oxydation en couche mince et en volume. Les produits d'oxydation sont identifiés, ce qui a permis d'améliorer la connaissance des processus de dégradation des composés en cours d'oxydation, et de montrer l'influence de ces processus sur la formation d'espèces oxydées volatiles, l'augmentation de la viscosité de l'huile et la formation d'espèces oxydées de haute masse molaire qui, en se condensant, participent à la formation de composés insolubles et de dépôts. This survey is based on an understanding of problems linked to the high-temperature oxidation of base stocks used for the formulation of lubricants for automotive engines. The oils investigated are of different origins : Middle East (MO and the North Sea (MDN, which respectively have high and low aromatics and sulfur contents, hydroisomerized oil (HYDI and polyalphaolefins (PA06, which are exempt from these compounds, and hydrocracked oil (HYDC, which has an intermediate

  13. Membrane Fractionation of Biomass Fast Pyrolysis Oil and Impact of its Presence on a Petroleum Gas Oil Hydrotreatment Fractionnement membranaire d’une huile de pyrolyse flash et impact de sa présence sur l’hydrotraitement d’un gazole atmosphérique

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    Pinheiro A.

    2013-09-01

    Full Text Available In order to limit the greenhouse effect causing climate change and reduce the needs of the transport sector for petroleum oils, transformation of lignocellulosic biomass is a promising alternative route to produce automotive fuels, chemical intermediates and energy. Gasification and liquefaction of biomass resources are the two main routes that are under investigation to convert biomass into biofuels. In the case of the liquefaction, due to the unstability of the liquefied products, one solution can be to perform a specific hydrotreatment of fast pyrolysis bio-oils with petroleum cuts in existing petroleum refinery system. With this objective, previous studies [Pinheiro et al. (2009 Energy Fuels 23, 1007-1014; Pinheiro et al. (2011 Energy Fuels 25, 804-812] have been carried out to investigate the impact of oxygenated model compounds on a Straight Run Gas Oil (SRGO hydrotreatment using a CoMo catalyst. The authors have demonstrated that the main inhibiting effects are induced from CO and CO2 produced during hydrodeoxygenation of esters and carboxylic acids. To go further, cotreatment of a fast pyrolysis oil with the same SRGO as used in the previous. studies was investigated in this present work. Firstly the bio-oil was separated into four fractions by membrane fractionation using 400 and 220 Da molecular weight cut-off membranes. The bio-oil and its fractions were analyzed by spectroscopic and chromatographic techniques. Then, one fraction (i.e. fraction enriched in compounds with molecular weight from 220 to 400 Da was mixed with the SRGO and co-treated. Despite some experimental difficulties mainly due to the emulsion instability, the hydrotreatment was successful. An inhibition has been observed on the hydro treating reactions of the SRGO in presence of the bio-oil fraction. The measurement of the CO/CO2/CH4 molar flowrate at the reactor outlet showed that the inhibition was due to the presence of CO and CO2 coming from HDO rather than to

  14. Entraînement de globules d'huile par un tensio-actif. Etude de la formation du banc Mobilization of Oil Ganglia by a Surfactant Analysis of Bank Formation

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    Moulu J. C.

    2006-11-01

    Full Text Available Lors de l'injection d'une solution de tensio-actif dans un gisement déjà balayé par de l'eau, l'huile résiduelle, piégée sous la forme de globules discontinus, est remise en mouvement et se regroupe éventuellement sous la forme d'un banc d'huile. Le but de la présente étude est d'expliquer la formation de ce banc au cours d'un tel déplacement. Les résultats d'expériences réalisées en micromodèles de billes de verre permettent de constater que : - la récupération globale est corrélable avec le nombre capillaire Nc= uVdf/O, u et Vdf étant la viscosité et la vitesse de Darcy du fluide injecté, O la tension interfaciale avec l'huile en place ; - la vitesse des globules varie différemment avec u, Vdf, O et tend vers la même limite plus grande que la vitesse du fluide injecté pour de grandes valeurs du nombre capillaire Nc ; - le banc d'huile ne se forme que dans le cas où la vitesse des globules atteint celle du fluide injecté. L'huile déplacée reste alors groupée avec une saturation importante au niveau du front de tensio-actif. When a surfactant solution is injected into a reservoir previously waterflooded, the residual oil trapped as discontinuous ganglia is mobilized and eventually bunched together forming an oil bank. The aim of this study is to explain the formation of this bank during such a drive. The results of experiments performed in micromodels of glass beads show that: a Overall recovery can be correlated with the capillary number, Nc = uVfd/O, in which u and Vfd are the viscosity a and Darcy velocity of the injected fluid and O is the interfacial tension with the oil in place. b Ganglia velocity varies differently with u, Vfd and O, and it tends towards the same limit faster than the velocity of the injected fluid for high values of the capillary number Nc. c The oil bank is formed only in the case where globule velocity attaints that of injected fluid. the dispaced oil then remains bunched, with high

  15. Formulation de fluxants pour bitumes à base d’esters méthyliques d’huiles végétales

    Directory of Open Access Journals (Sweden)

    Alfos Carine

    2003-09-01

    Full Text Available Les fluxants pétroliers servent à améliorer la viscosité du bitume lors de son répandage, et par voie de conséquence le mouillage des granulats. Leur évaporation entraîne la montée en cohésion du revêtement. Malheureusement, ces produits d’origine fossile, outre les problèmes qu’ils posent en termes de COV, ne sont pas sans effet sur les conditions de travail des personnels de chantier et l’environnement (air, eau. De plus leur utilisation s’effectue à 160 °C -- au-dessus du point éclair -- et n’est pas sans présenter un risque d’explosion (les sites industriels de fabrication et de stockage de ces produits nécessitent une autorisation de type installations classées. Le recours à des esters méthyliques d’huiles végétales (EMVH, comme fluidifiant permet de remédier à ces inconvénients, mais, sans optimisation (ajout d’additifs, la montée en consistance du liant s’effectue plus lentement selon la réaction de siccativation liée à la présence de doubles liaisons sur les chaînes grasses des esters. L’influence des caractéristiques chimiques des esters (composition en acides gras, teneur en tocophérols notamment et de l’ajout, en quantité catalytique, d’huiles végétales siccatives sur la siccativité finale des liants EMVH, ont été étudiés. Différents esters méthyliques ont été testés (esters méthyliques de colza, de tournesol et de lin. Les analyses réalisées avant et après traitement thermique (1 h à 160 °C pour tenir compte des conditions réelles d’utilisation font apparaître des corrélations entre, teneur en tocophérols, richesse en doubles liaisons conjuguées et performances au séchage. Une modification de la formule sur base esters a été optimisée par incorporation d’huiles végétales siccatives. Il s’avère que ces huiles jouent le rôle d’activateur ou d’inhibiteur de séchage, selon la nature de l’ester méthylique employé. Des

  16. Ifp's New Flexible Hydrocracking Process Combines Maximum Conversion with Production of High Viscosity, High Vi Lube Stocks Le nouveau procédé IFP d'hydrocraquage à haute flexibilité combine conversion maximum et production de bases, huile à haute viscosité et à indice de viscosité élevé

    Directory of Open Access Journals (Sweden)

    Hennico A.

    2006-11-01

    Full Text Available Institut Français du Pétrole (IFP has developed a new dual catalytic system for its hydrocracking process that enables high conversion to middle distillates and production of high viscosity, high VI lube stocks. Although the hydrocracking process is mainly devoted to the conversion of vacuum distillates, deasphalted oil or mixture of both into high quality middle distillates, it can also produce a residue, that after dewaxing will be a very high VI lube base oil. In this presentation major emphasis is put on the possibility to produce very high VI lubes with high viscosity thanks to the development of the new catalytic system. Large flexibility in feedstock selection and easy control of operating variables allow the production of all grades of lube oils associated with high quality middle distillates for a large range of conversion levels. L'Institut Français du Pétrole (IFP a mis au point, pour son procédé d'hydrocraquage, un nouveau système catalytique à 2 catalyseurs qui permet une forte conversion en distillats moyens et la production de fractions lubrifiantes à haute viscosité et indice de viscosité élevé. Si le procédé d'hydrocraquage est essentiellement utilisé pour la conversion de distillats sous vide, d'huile désasphaltée ou d'un mélange des deux en distillats moyens de haute qualité, il peut aussi produire un résidu qui, après déparaffinage, fournira une base pour lubrifiant à indice de viscosité très élevé. Cet article souligne particulièrement la possibilité de produire des lubrifiants à indice de viscosité très élevé et haute viscosité, grâce à ce nouveau système catalytique. Une grande flexibilité dans le choix des produits à traiter et la facilité de contrôle des paramètres opératoires permet la production de toutes les qualités d'huiles lubrifiantes associées à des distillats moyens de haute qualité, pour une large gamme de niveaux de conversion.

  17. Le processus de labellisation de l’Appellation d’Origine Protégée « Huile d’olive Bni Arouss »

    Directory of Open Access Journals (Sweden)

    Touriya Belaiche

    2015-10-01

    Full Text Available La reconnaissance des produits de terroir par une démarche de labellisation est l’un des axes d’intervention prioritaires du Plan Maroc Vert. Dans la région de Larache, il existe un savoir-faire ancestral en matière de greffage du rameau d’olivier (Olea Europaea sur des oléastres (Olea Sylvestris souvent centenaires. L’huile produite par ces oliviers greffés est prisée, à la fois pour son goût et pour les attributs qui lui sont prêtés, car ces arbres sont présents dans une zone ayant une importance culturelle et religieuse majeure. Nous avons mené un projet de recherche-intervention qui a visé à contribuer au maintien d'une oléiculture durable et rentable et à la préservation des savoir-faire traditionnels, par le biais de l'amélioration des pratiques de la filière et la labellisation. Cet article relate la méthodologie et les étapes que nous avons suivies pour accompagner les agriculteurs dans la démarche de labellisation et le dépôt d’une demande de reconnaissance d’Appellation d’Origine Protégée. Un premier diagnostic a permis d’identifier les problèmes de production, de récolte, de pressage et de conservation. Puis, l’aire géographique de l’appellation a été délimitée en partenariat avec un Groupement d’Intérêt Economique qui réunit les coopératives présentes dans la zone ainsi qu’avec les partenaires institutionnels. Enfin, un cahier des charges a été défini. Il décrit la future organisation de la production d’appellation protégée, au niveau des exploitations agricoles comme au niveau collectif. Le dossier d’Appellation d’Origine Protégée de l’« Huile d’olive Bni Arouss » a été déposé début 2014.

  18. Les homologations d'huiles pour moteurs thermiques dans l'administration des PTT Motor Oil Specifications for the French Postal and Telecommunications Administration

    Directory of Open Access Journals (Sweden)

    Illien J.

    2006-11-01

    Full Text Available L'Administration des PTT, qui dispose d'un parc automobile de plus de 50000 véhicules, a cherché à définir les exigences de graissage de ses moteurs afin de pouvoir acquérir, à un prix raisonnable, une huile de qualité bien adaptée à ses besoins. La variété des types de véhicules (essence et Diesel, des services (route et ville, plaine et montagne et des conditions climatiques (totalité du territoire français a nécessité une étude approfondie - à laquelle l'Institut Français du Pétrole a pris une large part - qui a abouti à la définition d'une huile type et d'essais pratiques sur véhicules très significatifs, objets d'un cahier des charges PTT présentant un intérêt général pour les autres grandes administrations ou services importants. Le présent article expose les motivations et les clauses du cahier des charges ainsi que les résultats des essais d'homologation de la dernière consultation. The French Postal and Telecommunications Admirtiistration (PTT, which has a fleet of more thon 50,000 vehicles, has been trying to define the lubrication requirements of its engines so as to be able to acquire, at a reasonable price, a higth-quality ail Chat is well suited to its needs. The variety of vehicle types (gasoline and diesel, of services (open road and towns, plains and mountains and of climatic conditions (all French territory required an in-depth study to be made, with the Institut Fronçais du Petrole playing an important part. This study resulted in the definition of a reference ail and of meaningful vehicle tests, all set forth in a PTT specifications book.

  19. Etude du déplacement de l'huile par le gaz Analysis of Oil Displacement by Gas

    Directory of Open Access Journals (Sweden)

    Delclaud J.

    2006-11-01

    Full Text Available Les ingénieurs « réservoir u prévoient avec beaucoup de difficultés l'exploitation des gisements en utilisant les relations perméabilités relatives-saturations fournies par les laboratoires. Ceci amène à se demander si le concept est valide en écoulement transitoire, si les mesures sont effectuées selon des procédures convenables, si la relation statique entre la pression capillaire et la saturation est conservée en régime variable, si enfin la méconnaissance des lois de combinaison de ces fonctions n'est pas la cause de l'insatisfaction des ingénieurs. Le travail présenté ici traite des trois premiers points. Deux séries d'expériences sont réalisées à cet effet : - d'une part, des expériences de déplacement de l'huile par le gaz, où l'on s'intéresse à l'établissement et à la caractérisation de phénomènes pseudo-stationnaires. Les échantillons poreux choisis sont de faibles dimensions. Ils permettent ainsi de réduire la durée des périodes transitoires; - d'autre part, des expériences de déplacement sur des échantillons homogènes de grandes dimensions où l'on étudie les phénomènes transitoires. On mesure, tout au long du massif, la pression dans les deux phases et la saturation. Les perméabilités relatives sont calculées en tout point et à tout instant, à partir des équations de continuité. II ressort de ces travaux que la relation perméabilité relative-saturation est la même en tout point du milieu poreux, tout au long de l'écoulement transitoire, qu'elle ne dépend pas de la vitesse d'écoulement et que la relation pression capillaire-saturation coïncide avec celle établie par la méthode des états restaurés. La validité du concept en écoulement transitoire est donc prouvée. La méthode de WELGE, JOHNSON, BOSSLER et NAUMANN conduit à des résultats différents de ceux obtenus. On montre, pour expliquer ces écarts, que les hypothèses théoriques de cette méthode sont

  20. Utilisation des huiles végétales et de leurs produits de transestérification comme carburants Diesel Use of Vegetable Oils and Their Transesterification Products As Diesel Fuels

    Directory of Open Access Journals (Sweden)

    Gateau P.

    2006-11-01

    Full Text Available L'utilisation d'huiles végétales et de leurs dérivés comme carburants Diesel a fait l'objet, depuis 1981, de plusieurs études financées par l'Agence Française pour la Maîtrise de l'Energie (AFME et réalisées par l'institut Français du Pétrole (lFP en collaboration avec Elf Renault, le Centre d'Etudes et d'Expérimentation du Machinisme Agricole Tropical (CEEMAT et l'institut de Recherches pour les Huiles et Oléagineux (IRHO. Ce document rassemble les résultats obtenus au banc d'essai sur plusieurs types de moteurs représentant un assez large éventail d'applications, depuis le motoculteur utilisé en agriculture africaine jusqu'au moteur classique de tracteur ou de camion. Deux types de produits ont été examinés : les huiles végétales elles-mêmes employées pures ou en mélange au gazole, et les esters méthyliques de ces huiles utilisés tels quels. Lors d'un fonctionnement de courte durée les huiles aussi bien que les esters conduisent globalement à un fonctionnement satisfaisant du moteur; les pertes de performances par rapport au gazole restent modérées voire imperceptibles. Les seuls problèmes dans ce cas concernent la mise en oeuvre, difficile avec les huiles en raison de leur très forte viscosité, beaucoup plus aisée avec les esters. En endurance, l'inconvénient majeur des huiles végétales et de leurs dérivés concerne la formation de dépôts au nez des injecteurs. Sur les moteurs rustiques à préchambre (type Hatz ce phénomène reste limité puisqu'il a été possible de conduire, sans incident, un ensemble d'essais d'endurance de 1100 h avec différents types d'huiles pures (arachide, coton, palme. Sur les moteurs à Injection directe la formation de dépôts constitue une très sérieuse contrainte puisqu'elle conduit pratiquement à proscrire l'utilisation d'huiles même en mélange (25 ou 50 % dans le gazole. Les esters peuvent alors être proposés à condition qu'un certain nombre de pr

  1. Etude phytochimique et pouvoir antîmicrobien de Juniperusphoenicea L., Juniperus oxycedrus L. et Cupressus sempervirens L. de la région de Tlemcen.

    OpenAIRE

    MAZARI, Khadidja

    2014-01-01

    Ce travail est consacré à l'étude pliytochimique et biologique de trois plantes: Juniperusphoenicea L., Juniperus oxycedrus L. et Cupressus J sempervirens L., poussant à l'état spontané dans la région de Tlemcen. P Des tests phytochimiques réalisés lors de cette étude ont permis de détecter les différentes familles de composés chimiques existantes dans les feuilles de ces plantes. L'extraction des huiles essentielles nous a révélé que le rendement en huile essentielle de J. phoeni...

  2. What is Essential for Virtual Reality Systems to Meet Human Performance Goals? (les Caracteristiques essentielles des systemes VR pour atteindre les objectifs militaires en matiere de performances humaines)

    Science.gov (United States)

    2001-03-01

    recherches doivent être entreprises sur la facilité d’utilisation de ces technologies afin de permettre aux militaires de les acheter en connaissance...learning. Presently the system is developed as a 1. generation version with basic functionality financed by our company. We find though, that the...missions and training sessions. The project is financed by Systematic and the ingredients used are Systematic’s skills and knowledge, technologically

  3. Main concerns of CFTC about sustainable development applied to energy; Preoccupations essentielles de la CFTC sur le developpement durable applique a l'energie

    Energy Technology Data Exchange (ETDEWEB)

    Laffitte, O.

    2003-07-01

    In the framework of the French national debate on energies, this paper presents the main recommendations of the trade union for chemistry, mining, textile industry and energy industry of the French syndicate CFTC about the application of the sustainable development principles to the energy domain: the energy right for everyone, the importance of individual and collective liabilities in the domain of energy production and consumption, the necessity of an urgent legislative evolution at the European level, a sustainable policy of energy production, the problem of the energy consumption in transportation systems, the problem of security and safety in energy industries, the industrial strategy of companies in the energy sector. (J.S.)

  4. Identification et étude du comportement de quelques additifs des huiles moteurs à base minérale par spectrophotométries IR intégrale et différentielle Identification and Study of the Behavior of Several Additives for Mineral-Bass Motor Oils by Differential and Integral Ir Spectrophotometry

    Directory of Open Access Journals (Sweden)

    Subran C.

    2006-11-01

    Full Text Available L'utilisation d'additifs dans les huiles moteurs est un facteur déterminant pour la longévité et les performances des moteurs. On présente dans cet article quelques procédés d'identification de certains additifs (améliorant d'indice de viscosité, antioxydants, détergents, antimousse, abaisseur du point de congélation en utilisant les méthodes de la spectroscopie IR différentielle et intégrale, l'étude de leur comportement durant l'altération des huiles, le contrôle des dosages dans les huiles neuves. La technique est caractérisée par sa rapidité, par les faibles quantités d'huile prélevées (millilitres, par la possibilité d'un contrôle permanent et d'un diagnostique possible de l'ensemble huile-moteur. The addition of additives to motor oils is one of the main factors in determining the optimum duration of the use of an oil as well as the lifetime and efficiency of an automotive engine. This article describes several processes used for identifying various additives (VI improvers, antioxidant, detergent, antifoaming, pour-point depressant involving differential and integral IR spectroscopy methods. Additive behavior during use is discussed along with how to control dosages in new oils. The technique proposed is characterized by its rapidity, by the small quantities of samples used (milliliters by the possibility of permanent control, and by being able to make a general diagnosis of the oil/engine system.

  5. Etude numérique et expérimentale des distributions équipées de poussoirs hydrauliques. Influence et comportement de l'aération de l'huile Numerical and Experimental Study of Valvetrains Equipped with Hydraulic Lash Adjusters. Influence and Behaviour of Oil Aeration

    Directory of Open Access Journals (Sweden)

    Porot P.

    2006-11-01

    Full Text Available Un code numérique de simulation des distributions équipées de poussoirs hydrauliques a été développé. Le code est basé sur trois sous-modèles couplés : mécanique, hydraulique et physique. Le premier étudie la distribution comme un assemblage masses ressorts, le deuxième étudie le poussoir comme un organe hydraulique à part entière et le dernier permet d'étudier l'aération de l'huile et en particulier les phénomènes de dissolution. Une validation expérimentale a été menée sur un banc culasse alimenté par une huile mélangée à de l'air en proportions mesurées. L'instrumentation permettait de mesurer l'accélération de la tête de soupape, son déplacement au voisinage du siège et la force entre poussoir et soupape. Cette validation a montré que la simulation reflétait bien la réalité, notamment en ce qui concerne les effets de l'aération. A model of valvetrain equipped with a direct acting hydraulic lash adjuster (HLA is presented. As it is the cause of many problems, a possible aeration is taken into account. The main model is made of three submodels:1. The first one is a mechanical one with masses, springs and dampers and needs the cam laws and the pressure of the chamber of the HLA as data. 2. The second submodel is an hydraulic one. It studies the HLA chamber through the check valve flows, the leakage flow and the mechanical strains on the chamber oil. This submodel gives the chamber pressure to the first submodel. 3. The third submodel is a physical one and evaluates the instantaneous amount of air present in the chamber oil. It takes into account the arrival of new bubbles through the check valve and the mass exchanges (diffusion, dissolution between the bubbles and the oil bulk. This amount of air has a direct influence on the chamber pressure calculation made in the second submodel. Experimental validation of the model was conducted on an engine head. This engine head was feeded by an oil circuit in which

  6. Caractéristiques dynamiques d'un écoulement co-courant eau-huile-air Dynamic Characteristics of a Co-Current Water-Oil-Air Flow

    Directory of Open Access Journals (Sweden)

    Fabre J.

    2006-11-01

    Full Text Available Les auteurs présentent une étude expérimentale sur la structure locale d'un écoulement quasi parallèle co-courant à trois phases : eau-huile-air. L'objectif principal de cette étude est la détermination des contraintes de cisaillement aux interfaces eau-huile et air-huile. L'écoulement est réalisé dans un canal rectangulaire équipé d'une soufflerie et d'un système pour séparer et recycler les phases liquides, en continu. Les résultats expérimentaux présentés sont relatifs aux régimes lisses des interfaces : les vitesses et leurs fluctuations sont mesurées par anémométrie laser dans l'eau et anémométrie à film chaud dans l'air. Les résultats sur l'interface gaz-liquide confirment que l'écoulement est identique à celui sur une paroi se déplaçant à la vitesse du liquide à la surface. Dans l'eau, la structure est celle d'un écoulement de Couette turbulent. Près de la paroi inférieure et près de l'interface liquide-liquide les échelles locales de vitesse et de longueur regroupent assez bien les mesures de vitesses et de fluctuations turbulentes longitudinales. This article is an experimental investigation, of the local structure of a quasi-parallel co-current three-phase flow invoiving water, oil and air. The main aim of this investigation is to determine the shear stresses on the water-oil and air-oil interfaces. Flow is induced in a rectangular channel equipped with a wind tunnel and a system for separating and recirculating the liquid phases continuously. The experimental results that are given have to do with smooth interface regimes. Velocities and their fluctuations are measured by laser anemometry in water and by hot-wire anenometry in air. The results on the gas-liquid interface confirm that flow is identical to flow over a wall moving at the velocity of the liquid on the surface. In water, the structure is that of a turbulent Couette flow. Near the bottom wall and near the liquid-liquid interface, the

  7. Multi Response Optimization of NOx Emission of a Stationary Diesel Engine Fuelled with Crude Rice Bran Oil Methyl Ester Optimisation à réponses multiples de l’émission de NOx d’un moteur Diesel stationnaire alimenté par de l’ester méthylique d’huile de riz brut

    Directory of Open Access Journals (Sweden)

    Saravanan S.

    2012-05-01

    Full Text Available In the present work, an attempt was made to reduce the NOx emission of crude rice bran oil methyl ester without any considerable increase in smoke density, when used as a fuel in a stationary CI engine. Three factors namely, fuel injection timing, Exhaust Gas Recirculation (EGR and fuel injection pressure were chosen and their combined effect in controlling the NOx emission of a stationary Diesel engine fuelled with crude rice bran oil methyl ester was investigated. Three levels were chosen in each factor and NOx emission, smoke density and brake thermal efficiency were taken as the response variables. Experiments were designed by employing design of experiments method and Taguchi’s L9 orthogonal array was used to conduct the engine tests with different levels of the chosen factors. Multi Response Signal-to-Noise ratio (MRSN was calculated for the response variables and the optimum combination level of factors was obtained simultaneously using Taguchi’s parametric design. Confirmation experiment was conducted for the obtained optimum combination level of factors and the results were compared with normal operating conditions and significant improvement was observed in the response variables. Dans la présente étude, il a été tenté de réduire les émissions de NOx de l'ester méthylique d'huile de riz brut sans accroissement considérable de la densité de fumée lorsqu'il est utilisé comme carburant dans un moteur stationnaire à allumage par compression. Trois facteurs, à savoir le calage d'injection de carburant, le pourcentage de recirculation des gaz d'échappement (EGR ; Exhaust Gas Recirculation et la pression d'injection de carburant ont été choisis, et leur effet combiné a été examiné en matière de maîtrise des émissions de NOx d'un moteur Diesel stationnaire alimenté avec de l'ester méthylique d'huile de riz brut. Trois niveaux ont été choisis pour chaque facteur et les émissions de NOx, la densité de fum

  8. adaptation et selection de varietes performantes de riz pluvi

    African Journals Online (AJOL)

    PROJET SOJA

    plante (graines, tiges et racines) sont intéressantes pour les protéines (17,5 %) et les ... Le taux en huile essentielle de 2,7 % pour la plante en floraison est ... Les formations végétales sont de type matorral dense sur des sols tantôt jeunes.

  9. sur la croissance des graines de gombo en serre Résumé Abstract

    African Journals Online (AJOL)

    AKA BOKO

    Laboratoire de Physiologie végétale, Phytopathologie et Amélioration des plantes, Unité ... C'est une plante de grande valeur nutritionnelle, riche en protéines, sels ..... les huiles essentielles du gingembre sont majoritairement constituées de.

  10. 2308-IJBCS-Articles-Dr Cheikh Thiaw

    African Journals Online (AJOL)

    hp

    2 Direction de la Protection des végétaux (DPV); KM 15, Route de Rufisque, ... post-récolte au Sénégal, la bioactivité des extraits et huile essentielle de Senna occidentalis L. sur les œufs et ... protéine (25%) et en lipide (50%) alimentaire.

  11. 1017-IJBCS-Article-Ines Edna Deleke Koko

    African Journals Online (AJOL)

    DR GATSING

    2 Laboratoire de Pharmacognosie et des huiles essentielles, Faculté des Sciences Techniques (UAC). ... chimiques contenus dans les drogues végétales utilisées pour le traitement ...... capables de se combiner aux protéines de la peau pour ...

  12. 2134-IJBCS-Article-Prof Paulin Azokpota

    African Journals Online (AJOL)

    hp

    végétales utilisées comme emballages alimentaires en Afrique de l'Ouest ... 4Laboratoire de Pharmacognosie et des Huiles Essentielles (L.A.P.H.E) ; Faculté des Sciences et techniques, ... Il est apparu que les teneurs en protéines, en lipides.

  13. Évaluation de l'activité antimicrobienne de quatre feuilles utilisées ...

    African Journals Online (AJOL)

    SARAH

    30 nov. 2015 ... poudre végétale des feuilles de chaque espèce (Musa sapuentum, Manihot esculenta .... huiles essentielles extraites de certaines espèces de plantes et testées sur ..... protéines membranaires, telles que les porines. Le LPS.

  14. Insensitive Munitions (Les Munitions a Risque Attenue)

    Science.gov (United States)

    1992-07-01

    une huile ou un fluide 1,pk-.dA0 nvdrauliqiie. at oii i uantite d air disponible aixi ie eat limitee. Lea terni--atures sont beaucoup moina W...securisation sont des composantes essentielles de I environnement "munition". SAFETrY SPECIFICATIONS AND C-RITERIA CONC’ERNING MUNITIlONS’ INTFENDFI) FOR THEF

  15. Détermination des facteurs physicochimiques liés à la qualité de l’huile de palme intervenant dans la stabilité de la ‘sauce jaune’

    OpenAIRE

    2013-01-01

    La « sauce jaune » est une sauce qui accompagne le taro (Colocassia esculenta) pilé, met autrefois réservé aux cérémonies traditionnelles dans l’Ouest et le Nord-Ouest du Cameroun. La «sauce jaune» est une émulsion d’huile de palme dans l’eau stabilisée par le sel gemme dans laquelle on ajoute un certain nombre d’épices écrasées. La préparation de cette sauce est très délicate. Nous avons par un questionnaire mené une enquête dans les quartiers de la ville de Yaoundé portant su...

  16. Diffusion du matériel végétal amélioré palmier à huile en milieu villageois : l’expérience du Bénin

    Directory of Open Access Journals (Sweden)

    Adje Isaac A.

    2001-09-01

    Full Text Available Le palmier à huile se cultive dans la région du Sud Bénin où il représente un produit populaire et de grande notoriété au sein des producteurs agricoles. Son importance socio-économique reste très marquée tant au niveau des populations qu’au niveau national. Ainsi, depuis l’époque coloniale jusqu’aux premières décennies de l’indépendance du pays, les plans de développement ont consacré d’importants financements pour sa promotion, notamment le sous-secteur industriel à travers les différentes sociétés d’État qui ont été successivement créées à cet effet [1]. Malgré ces importants efforts et l’engouement des populations, cette culture a connu un déclin parce qu’elle n’a pas pu s’adapter assez rapidement à l’évolution du climat, marquée par une chute de la pluviométrie, et à la fluctuation du marché mondial des oléagineux caractérisé par la concurrence des pays producteurs des zones écologiquement plus favorables [2]. Il s’en est suivi au Bénin une désorganisation de la filière dans toutes ses composantes (palmeraies villageoises et plantations industrielles qui a été préjudiciable à l’économie nationale. Suite à sa libéralisation, marquée par la mise en oeuvre des Programmes d’ajustement structurel (PAS, on assiste à un redressement général de l’économie nationale qui a touché aussi le secteur palmier à huile et a amené l’État à décider de la réhabilitation de cette filière. La dévaluation du franc CFA intervenue en 1994 a été un atout majeur pour justifier cette relance. Ainsi, dans le cadre de la table ronde sur le secteur rural de septembre 1995 et dans celui de la priorité accordée à la diversification agricole, l’orientation a été prise de relancer la production du palmier à huile par des actions au nombre desquelles on peut citer le « programme de développement des plantations villageoises et celui de la réhabilitation des plantations

  17. Comparative Studies with N-Methyl-2-Pyrrolidone and Furfural As Solvents for Extraction of Lube Distillates Etude comparative de deux solvants, la n-methyl-2 pyrrolidone et le furfural, pour l'extraction de distillats pour huiles lubrifiantes

    Directory of Open Access Journals (Sweden)

    Krishna R.

    2006-11-01

    Full Text Available Solvent extraction of spindle raw lube distillate from Oman crude using n-methyl pyrrolidone (NMP containing 1. 5wt. % water has been studied using a six-stage all-glass mixer-settler. Results of three operating temperatures with NMP are reported. A 65-55°C extraction temperature appears to be most appropriate for this stock. Data obtained at this temperature have been compared with those for furfural on the basis of phase boundary curves, extraction and lube refining indices and selectivity. Comparison of the results shows NMP to be more selective as far as raffinate yield is concerned. It requires lower operating solvent-to-feed ratios and lower temperatures. On étudie dans cet article l'extraction par solvant de distillats bruts pour huiles lubrifiantes spindles au moyen de n-méthyl pyrrolydone (NMP contenant 1,5 % d'eau en poids, dans une unité en verre constituée par une batterie de six mélangeurs-décanteurs. On présente les résultats relatifs à trois températures de fonctionnement avec la NMP. Une température d'extraction de 66-55°C est celle qui convient le mieux pour cette huile de base. On compare les résultats obtenus à cette température avec ceux du furfural, en ce qui concerne les courbes de solubilité, les indices de raffinage et d'extraction, et les sélectivités. La comparaison des résultats montre que la NMP est plus sélective et conduit à un rendement de raffinat plus élevé. Elle nécessite des taux de solvant par rapport à la charge plus faibles ainsi que des températures d'extraction plus basses.

  18. Hydrocraquage sous pression d'une huile de soja : procédé d'étude et allure générale de la transformation Soybean Oil Hydrocracking under Pressure: Process and General Aspect of the Transformation

    OpenAIRE

    Nunes P. P.; Brodzki D.; Bugli G.; Djega-Mariadassou G.

    2006-01-01

    Un procédé d'étude de l'hydrocraquage des huiles végétales en autoclave est décrit. Les principaux objectifs de cette étude sont relatifs à la transformation de l'huile de soja (composé modèle) en essence et gazole, en limitant la formation de polymères et de coke. L'analyse des gaz et la chromatographie haute résolution de deux fractions résultant de la distillation sous vide de la phase liquide ont permis de mettre en évidence les principales étapes de l'hydrocraquage. Pour cette première a...

  19. Analysis of heavy oils flows in saturated rocks; Analyse des ecoulements d'huiles lourdes dans les roches saturees

    Energy Technology Data Exchange (ETDEWEB)

    Luc Dormieux; Denis Garnier [Ecole Nationale des Ponts et Chaussees, 6 et 8 avenue Blaise Pascal Cite Descartes - Champs/Marne, 77455 Marne la Vallee Cedex 2, (France); Thierry Yalamas; Elisabeth Bemer; Jean-Francois Nauroy [Institut Francais du Petrole 1 et 4 avenue de Bois-Preau, 92852 Rueil-Malmaison Cedex, (France)

    2005-07-01

    In heavy oil reservoirs, the fluid is a viscous material, possibly nonlinear. In order to describe the flow of such oils in the rock, an extension of Darcy law to non Newtonian fluids is presented. Besides, oil production in this type of reservoir is responsible for rock erosion and the formation of a paste (slurry) made up of a mixture of oil and sand grains is observed. Based on a non linear homogenization technique, a modelling of the constitutive behavior of this slurry is proposed. (authors)

  20. Huiles et corps gras végétaux : ressources fonctionnelles et intérêt nutritionnel

    Directory of Open Access Journals (Sweden)

    Morin Odile

    2012-03-01

    Full Text Available The wide variety of oleaginous resources potentially provides to industrial users a wide range of fats and oils, and so, a large range of properties. But less than 10 vegetable fats and oils – such as palm and its fractions, soybean, rapeseed, sunflower, cotton, peanut and olive oils – represent more than 90 % of the world production. So, these few vegetable fats and oils will have to respond simultaneously to numerous expectations, depending on the user, such as providing optimized nutrients and offering the texture looked forward or resisting to an established cooking temperature. Innovation (use of new variety with modified compositions, existing “niche” oil or completely new resource could be an option to solve a specific issue, even if economical or regulatory constraints may not favor such alternatives. After summarizing vegetable fats and oils composition and the properties of fatty acids, this paper presents not only optimized processes allowing extraction of compounds of interest, but also processes for the conversion and enlargement of oils and fats functionalities in order to answer to the different and specific expectations of industrial users and consumers.

  1. Les ajustements dans l’économie de plantation villageoise de palmier à huile face à la privatisation de la filière en Côte d’Ivoire

    Directory of Open Access Journals (Sweden)

    Akindes Francis

    2001-11-01

    Full Text Available Les techniques nouvelles diffusées par la Sodepalm ont bouleversé les pratiques culturales dans le milieu paysan ivoirien. Ces techniques qui ont accompagné l’introduction de la monoculture intensive du palmier à huile ont influencé les comportements à au moins deux niveaux : le premier est celui de la vulgarisation d’un matériel végétal hautement performant, en lieu et place de la variété dura, traditionnellement exploitée en quasi-cueillette par les populations du Sud forestier ; le second niveau tient dans l’insertion des planteurs villageois de palmiers dans un système « contractuel » au sein duquel la structure d’encadrement offre sa connaissance technique, ses moyens de production et sa monnaie [1]. En retour, il appartient au planteur de faire montre de sa volonté de travail, de son acceptation des nouveaux itinéraires techniques, principalement orientés vers la maximisation du rendement à l’hectare des arbres et, au final, de mettre ses produits à la disposition des usines de l’Ensemble agro-industriel (EAI dont il dépend. Pendant presque trois décennies, la gestion intégrée de la filière dévolue à la Palmindustrie1 dans un contexte socio-économique stable a permis une planification et un suivi plus ou moins effectifs de ces activités de production et de transformation des régimes villageois. Mais, à partir de 1986, des difficultés liées à la chute des cours internationaux ont profondément affecté cette organisation de la filière. Elles ont entraîné une progressive déstabilisation des modes de gestion et induit des changements institutionnels et organisationnels majeurs [2]. Les projets d’extension et de renouvellement du verger ont été compromis du fait de l’arrêt des grands programmes incitatifs, de l’allégement du dispositif d’encadrement et de la disparition des subventions aux intrants. En 1995, les planteurs ont été conviés à s’auto-approvisionner en semences s

  2. Energy Equation Derivation of the Oil-Gas Flow in Pipelines Dérivation de l’équation d’énergie de l’écoulement huile-gaz dans des pipelines

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    Duan J.M

    2012-09-01

    well describe the oil-gas two-phase flow. Lors de la simulation d’un écoulement multiphasique huile-gaz dans une conduite, le calcul thermodynamique représente un processus important en interaction avec le calcul hydraulique; il influence la convergence du programme et la précision des résultats. La forme de l’équation d’énergie constitue la clef du calcul thermodynamique. Basée sur l’équation d’énergie de l’écoulement huile-gaz dans un pipeline, la formule de chute de température explicite (ETDF; Explicit Temperature Drop Formula est dérivée pour un calcul de température d’état stable huile-gaz. Cette nouvelle équation d’énergie prend en compte de nombreux facteurs, tels que l’effet Joule-Thomson, le travail de pression, le travail de frottement, ainsi que l’incidence des ondulations de terrain et le transfert de chaleur avec le milieu extérieur le long de la ligne. Ainsi, il s’agit d’une forme globale de l’équation d’énergie, laquelle pourrait décrire précisément la réalité d’un pipeline à phases multiples. Pour cette raison, un certain nombre de points de vue de la littérature à propos du calcul de température d’un écoulement diphasique huile-gaz dans des pipelines sont passés en revue. L’élimination de la boucle d’itération de température et l’intégration de l’équation de température explicite, au lieu de l’équation d’énergie d’enthalpie, dans le calcul conjugué hydraulique et thermique, se sont avérées améliorer l’efficacité de l’algorithme. Le calcul a été appliqué non seulement au modèle de composants mais aussi au modèle Black-Oil. Ce modèle est incorporé respectivement dans le modèle de composants ainsi que le modèle Black-Oil et deux simulations sont effectuées sur deux pipelines en service, les pipelines multiphasiques Yingmai-Yaha et Lufeng; les résultats de température sont comparés à la simulation calculée par OLGA et aux résultats mesurés. Il

  3. Improvement of Heavy Oil Recovery in the VAPEX Process using Montmorillonite Nanoclays Amélioration de la récupération d’huile lourde par utilisation de nanoargiles de Montmorillonite dans le procédé VAPEX

    Directory of Open Access Journals (Sweden)

    Pourabdollah K.

    2011-10-01

    Full Text Available In this paper, the nanoclay particles were introduced as mobile adsorbents in oil reservoirs to adsorb the asphaltenes, reduce the viscosity and enhance the dispersion. The objective of this paper is experimental investigation of enhanced heavy oil recovery using in situ nanoparticles for the first time. Moreover, two thermal analysis methods (thermogravimetry and differential thermal analysis were used to analyze the asphaltene content of residue hydrocarbons in the swept chambers in nano-assisted and conventional VAPEX processes. Experiments were carried out using Iranian heavy oil and propane: the setup consisted of two sand-packed cells; one packed only with glass beads as the oil matrix and the other with glass beads and modified montmorillonite as the nanoclay, while they had similar porosity and permeability. The content of deposited asphaltene in swept matrixes, the propagation pattern of vapor chambers in heavy oil matrixes, and the rates of solvent consumption and oil production were determined. The results elucidated that montmorillonite changed the matrix heterogeneity and led to forming enhanced breakthroughs, to increasing the interfacial surface of vapor/bitumen and to accelerating the oil production. It was found that not only was the rate of vapor injection diminished, but the heavy oil recovery was also markedly enhanced by 30(±4%. Dans cet article, on decrit l’utilisation de particules de nanoargile en tant qu’adsorbant mobile dans des reservoirs d’huile afin d’adsorber les asphaltenes, reduire la viscosite de l’huile et renforcer la dispersion. L’objectif de cet article consiste en la description d’une etude experimentale de recuperation amelioree d’huile lourde par l’utilisation de nanoparticules in situ. Ce qui constitue une premiere. En outre, deux methodes d’analyse thermique (thermogravimetrie et analyse thermique differentielle ont ete utilisees pour analyser la teneur en asphaltene des residus d

  4. Oil Shale and Its Relation to Petroleum and Other Fuels (Summary Les schistes à l'huile et leurs relation avec le pétrole et les autres combustibles (résumé

    Directory of Open Access Journals (Sweden)

    Billo S. M.

    2006-10-01

    Full Text Available World oil reserves in oil shales (1. 2 to 2 trillion barrels are at least 4 times as large as proven crude oil petroleum reserves (310 billion barrels. Petroleum is produced from oil shale by pyrolysis (destructive distillation by hecit. Coal can also be converted ta synthetic petroleum products by direct hydrogenation and by the modified Fischer-Tropsch process. Rising cost of oil exploration and production and increasing efficiency of synthetizing processes indicate that synthetic fuels may increase the supply of natural liquid fuels in the foreseeable future. The term kerogen is often used to comprise all the organic matter contained in sediments and may be of two kinds: 1 coalylike kerogen, and 2 sapropellic kerogen - oil shale type. It is believed that both kerogen and petroleum were formed from hypothetical ancestor - protopetroleum. They are found together in sedimenfs and their C13C12 ratios are similar. The largest producer of oil shale ore China, the USSR and Sweden. The USA is technologically prepared to begin production of synthetized fuels through varying economic condition. Richness and size of deposits, cost of mining, cost of retorting, character of products, and location of deposit in relation to plant and market, determine the economic value of a given deposit. Les réserves mondiales de schistes à huile (1,2 à 2 x 10. 12 barils sont au moins quatre fois supérieures aux réserves prouvées de pétrole brut (310 x 10. 9 barils. On extrait le pétrole des schistes par pyrolyse (distillation destructive thermique. Le charbon peut aussi être transformé en hydrocarbures par hydrogénation et par le procédé Fischer-Tropsch modifié. L'augmentation des coûts de l'exploration et de la production du pétrole et amélioration de l'efficacité des procédés synthétiques montrent que les produits synthétiques vont jouer un rôle croissant dans l'approvisionnement en combustibles liquides au cours des années à venir. Le terme k

  5. Adoption du matériel végétal et itinéraires techniques en plantations villageoises de palmier à huile. Cas de la région des lagunes, Côte d’Ivoire.

    Directory of Open Access Journals (Sweden)

    Cheyns Emmanuelle

    2001-09-01

    Full Text Available En Côte d’Ivoire, la privatisation de la société d’État Palmindustrie, en 1997, marque un tournant dans l’organisation de la filière palmier à huile. Les planteurs villageois, qui représentent aujourd’hui deux tiers des superficies en palmier, bénéficiaient d’un système d’approvisionnement en intrants à crédit et d’un conseil technique via un système d’encadrement par la société d’État. La privatisation de la filière et les incertitudes qu’elle suscite, ainsi que la forte chute des cours mondiaux de l’huile depuis deux ans ont conduit progressivement à une suppression du système d’approvisionnement à crédit et à une modification de l’encadrement technique des planteurs villageois [1]. Les conséquences directes sont une tendance à la diminution de l’investissement en intrants chez les petits planteurs (faibles apports en engrais, utilisation de matériel végétal non sélectionné et, dans certaines zones, au développement de stratégies de diversification qui conduisent à des pratiques culturales moins intensives (association de cultures vivrières au palmier les trois premières années de plantation d’une parcelle, etc. [2]. Une région est particulièrement touchée en Côte d’Ivoire, il s’agit de la région des Lagunes (périphérie d’Abidjan. La proximité d’un marché important (Abidjan pour la vente d’huile artisanale et de vin et d’alcool de palme (bangui et koutoukou, ainsi que la limitation de la fourniture de semences dans cette région au cours du deuxième Plan palmier (1985 à 1990, voir encadré ont largement contribué au développement de stratégies de production éloignées des itinéraires techniques conseillés par les encadreurs, et ce bien avant la privatisation, même si celle-ci accentue les tendances [3, 4]. Une enquête2 auprès de 150 planteurs villageois de la région des Lagunes a été réalisée afin de quantifier et tenter d’expliquer ces

  6. Étude théorique et expérimentale du transfert du dioctyl phtalate à partir d'un disque de PVC plastifié plongé dans une huile comestible

    Science.gov (United States)

    Djilani, S.-E.; Toubal, A. A.; Messadi, D.

    1998-10-01

    When polymer and liquid are contacted with each other, as in packaging, some mass exchanges may occur, which constitute a major drawback when the liquid is a foodstuff or blood. However, these mass transfers in the polymers can appear as very interesting from the industrial point of view, if one is able to use and control them. It is then necessary to have a good knowledge of these transfer processes which are controlled by diffusion. Dioctyl phthalate (DOP) migration into an edible oil was studied under worst conditions: high plasticization level (50% by weight) and temperature(30 circC). The quantitative analysis of DOP in a such complex liquid medium and in the PVC itself was made easy by the use of the radioactive tracer technique. A simplified mathematical model, obtained by neglecting the oil transport in the PVC, was evaluated. This model based on the research of a finite differences explicit solution allows to reproduce for the DOP, the concentration profiles in the polymer and the kinetics of transfer in the oil, with a P-value ≥ 0.001. La mise en contact polymère-liquide se traduit généralement par des échanges de matière entre les 2 milieux considérés, ce qui constitue un inconvénient majeur lorsque le liquide est un aliment ou le sang. Cependant, ces transferts de matière dans les polymères peuvent apparaître comme très intéressants sur le plan industriel, si l'on est capable de les utiliser et de les contrôler. Il est donc nécessaire d'avoir une bonne connaissance de ces processus de transfert qui sont contrôlés par diffusion. Nous avons étudié la migration du dioctyl phtalate (DOP) dans une huile comestible en nous plaçant dans les conditions les plus défavorables: taux de plastification (50% en poids) et température (30°C) élevés. L'analyse quantitative du DOP dans un milieu liquide aussi complexe et dans le PVC lui- même a été facilitée par l'utilisation de la technique des traceurs radioactifs. Un modèle math

  7. Imaging of Pseudo Oil Base Mud in Environmental Scanning Electron Microscopy Imagerie des boues de forage à base d'huile de substitution par microscopie électronique à balayage ambiant

    Directory of Open Access Journals (Sweden)

    Tricart J. P.

    2006-12-01

    Full Text Available Characterizing pseudo oil base muds (POBM amounts to determining the relationships between the size distribution of droplets and stability of emulsions. Conventional scanning and transmission electron microscope (SEM and TEM have been used to investigate these problems. However, hydrated samples are difficult to handle using such techniques. The Environmental Scanning Electron Microscope (ESEM or Electroscan and the cryogenic techniques have opened the door to the study of wet and non-conductive specimens, and of various liquids or emulsions. ESEM with the cold stage allows us to directly visualize emulsions :- without any preparation or coating;- at different temperatures, by controlling the specimen temperature (between -180°C and -8O°C and pressure (between 400 and 1400 Pa. La caractérisation des boues de forage à base d'huile de substitution (POBM équivaut à définir la relation entre la répartition dimensionnelle des gouttelettes et la stabilité des émulsions. Les microscopes électroniques à balayage (SEM et à transmission (TEM classiques ont été utilisés pour étudier ces problèmes. Toutefois, les échantillons hydratés sont d'un traitement difficile à l'aide de ces techniques. Le microscope environnemental électronique à balayage (ESEM ou electroscan et les techniques cryogéniques ont ouvert la voie à l'étude de spécimens humides et non conducteurs, de liquides et d'émulsions divers. A froid, l'ESEM nous permet de visualiser des émulsions : - sans aucune préparation ou enrobage, - à différentes températures, en régulant la température (entre - 180°C et - 80°C et la pression (entre 400 et 1400 kPa du spécimen. Le présent document se propose de caractériser les boues à base d'huile de substitution et d'étudier : - l'homogénéité de la formulation et la procédure de préparation, - l'influence de la répartition dimensionnelle des gouttelettes sur la stabilité des émulsions.

  8. Indices chimiques pour l'évaluation de l'état diagénétique des huiles et des roches sapropéliques Chemical Evidence for Evaluating the Diagenetic State of Sapropelic Oils and Rocks

    Directory of Open Access Journals (Sweden)

    Du Rouchet J.

    2006-11-01

    Full Text Available Les analyses chromatographiques des vapeurs produites par le chauffage à 220 °C d'huiles brutes et de roches mettent en évidence une augmentation avec la diagenèse des teneurs en n-alcanes relativement aux teneurs en cyclones et en iso-alcanes. Une étude statistique permet de préciser la regularite de l'evolution des rapports des teneurs en n-C 6 et en méthylcyclopentane etdes teneurs en n-C 7 et en I-trans-2-diméthylcyclopentane et met en évidence pour les roches une corrélation significative entre ces rapports et les réflectances de la vitrinite. Ces rapports peuvent donc être considérés comme des indicateurs diagénétiques; ils paraissent être moins dépendants des caractéristiques particulières de la matière organique originelle que les couples pristane-n-C 17 et phytane-n-C 18 habituellement utilisés pour repérer l'état d'évolution des huiles et des extraits de roche. Une calibration en termes de réflectance de la vitrinite est proposée. Chromatographic analyses of the vapors produced by crude cils and rocks heated to 220°C reveal, with diagenesis, an increase in the n-alkane contents with respect to the cyclone and isoalkane contents. A statistical survey shows the regularity of the variation in the ratios of the n-C 6 and methylcyclopentane contents and the n-C7 and I-trans-2-dimethylcyclopentane contents and reveals a meaningful corrélation for rocks between these ratios and the vitrinite reflectances. Therefore, these ratios may be considered as diagenetic indicators. They appear to depend less on the particular properties of the original organic motter thon on the pristane/n-C 17 and phytane/n-C 18 pairs normally used to determine the state of evolution of ails and of rock extracts. A calibration in terms of vitrinite reflectance is proposed.

  9. Rôle des additifs anti-usure des huiles lubrifiantes dans un teste de frottement simulant le contact segment-chemise Role of Antiwear Additives for Lube Oils in a Friction Test Simulating Ring-Liner Contact

    Directory of Open Access Journals (Sweden)

    Martin J. M.

    2006-11-01

    Full Text Available Nous avons mis en oeuvre un test de frottement dans lequel les conditions tribologiques sont voisines de celles existant au niveau segment-chemise des moteurs à explosion. Nous avons éprouvé différentes huiles commerciales ainsi que des additifs purs. Ayant choisi la température comme paramètre variable au cours de ce test nous pouvons déterminer pour chaque lubrifiant une plage de température correspondant à une zone d'efficacité maximale de l'additif anti-usure qu'il contient. La température correspondant à la limite inférieure de cette plage est liée à la nature chimique de l'additif. De plus lorsqu'un gradient de température existe entre les deux pièces en frottement, on observe, dans la zone d'efficacité maximale du lubrifiant, un phénomène de pulsations verticales de la goutte d'huile placée dans le contact. Des éléments d'interprétation, expliquant ces deux phénomènes, sont proposés et conduisent à relier l'efficacité anti-usure d'un additif à ses propriétés d'adsorption à la surface des pièces frottantes. The tribological conditions in the test used were similar to these existing in the ringliner area. of explosion engines. Different commercial cils were tested along with pure additives. Since temperature was chosen as a variable parameter during these tests, it was possible to determine a temperature range for each lubricant, corresponding to the maximum efficiency zone for the antiwear additive it contained. The temperature corresponding to the lower limit of this range is linked to the chemical nature of the additive. Likewise, when a temperature gradient exists between two rubbing parts, a vertical pulsation phenomenon of the drop of cil n the contact area occurs in the maximum efficiency zone of the lubricant. Interpretation elements explaining these two phenomena are proposed and lead to linking the antiwear efficiency of an additive to its adsorption properties on the surface of rubbing parts.

  10. Évolution des classifications et spécifications des huiles pour moteurs (situation en avril 1989 Evolution of Classifications and Specifications for Motor Oils (Situation April 1989

    Directory of Open Access Journals (Sweden)

    Ayel J.

    2006-11-01

    Full Text Available D'une manière générale, les lubrifiants pour moteurs répondent à des classifications de viscosité et de service ainsi qu'à des spécifications émanant d'organismes nationaux ou internationaux, comme la Society of Automotive Engineers (SAE et l'American Petroleum Institute (API aux États-Unis ou le Comité des Constructeurs d'Automobiles du Marché Commun (CCMC en Europe. Celles-ci sont destinées à mieux qualifier les produits. De leur côté, les constructeurs de moteurs établissent, de plus en plus systématiquement, des normes d'homologation d'huiles afin de satisfaire au mieux les exigences de lubrification de leur production dans le but d'améliorer la longévité et la fiabilité des mécaniques tout en rationalisant leur entretien. De grands utilisateurs, enfin, tels que les armées ou les grandes administrations civiles, ont également mis au point des spécifications, véritables cahiers des charges, pour satisfaire leurs propres besoins. Toutes ces normes définissent des limites de caractéristiques physico-chimiques ainsi que des niveaux minimaux de performances à atteindre lors d'essais sur moteurs et sur simulateurs de laboratoire. Avec le développement technologique des moteurs à essence et Diesel, ainsi qu'avec l'apparition de nouvelles contraintes législatives, économiques et écologiques (économie d'énergie, allongement des intervalles de vidange, lutte antipollution, . . . , ces spécifications sont devenues de plus en plus nombreuses et de plus en plus complexes. De plus, elles sont en perpétuelle évolution, quelquefois à un rythme excessif. Malgré cela, le présent document fait le point sur la situation des normes au début de l'année 1989, analyse les plus importantes d'entre elles, rappelle, le cas échéant, les grandes étapes qui ont mené aux spécifications actuelles et, lorsque cela est possible, indique leurs évolutions prévisibles dans un avenir relativement proche. Generally speaking

  11. Gasoils de substitution à partir d'esters d'huiles végétales: une opportunité pour certains pays ? Replacement Gas Oils from Vegetable Oil Esters: an Opportunity for Some Countries ?

    Directory of Open Access Journals (Sweden)

    Stern R.

    2006-11-01

    Full Text Available Les procédés IFP de fabrication d'esters méthylique ou éthylique à partir d'huiles végétales offrent le double avantage d'assurer une production valorisable à la fois en tant que substitut du gasoil, notamment pour certains pays en voie de développement, et comme matière première chimique pour l'industrie. Le point clé de l'économie de la transformation réside dans la valorisation du sous produit principal qu'est la glycérine; l'intérêt de lui trouver de nouveaux débouchés est la conclusion immédiate qui ressort de toutes les études à caractère économique entreprises sur le sujet. IFP processes for manufacturing methyl or ethyl esters from vegetable oils have the double advantage of upgrading production both as a replacement for gas oil, particularly for some developing countries, and as a chemical raw material for industry. The key point in the economics of processing lies in the upgrading of the main byproduct, which is glycerine. The advantage of finding new outlets for it is the immediate conclusions shown by all the economic studies undertaken on this subject.

  12. Application de la chromatographie sur couche mince à l'étude quantitative et qualitative des extraits de roches et des huiles Application of Thin-Layer Chromatography to the Quantitative and Qualitative Analysis of Rock and Oil Extracts

    Directory of Open Access Journals (Sweden)

    Huc A. Y.

    2006-11-01

    Full Text Available La technique développée ici répond à un besoin de miniaturisation des analyses des huiles et des extraits de roche. La chromatographie sur couche mince permet en effet l'analyse qualitative et quantitative de faibles quantités d'échantillons. On peut grace à cette méthode étudier les extraits obtenus à partir des cuttings (5 à 10 g de roche. Nous nous sommes attachés à faire une étude critique de l'information obtenue et de comparer cette dernière aux résultats fournis par les autres méthodes analytiques (chromatographie liquide. The technique described here meets the need to miniaturize analyses of ails and rock extracts. Thin-layer chromatography tan be used for the qualitative and quantitative analysis of small amounts of samples. This method is capable of onalyzing extracts from cuttings (5 ta 10 g of rock. This article attempts to make a critical study of the information obtained and to compare il with results using other analytical methods (liquid chromatography.

  13. La filière palmier à huile en Côte d’Ivoire 3 ans après la privatisation : état des lieux d’un procès de recomposition institutionnelle

    Directory of Open Access Journals (Sweden)

    Cheyns Emmanuelle

    2000-03-01

    Full Text Available La filière palmier à huile en Côte d’Ivoire se trouve dans une phase de transition. La privatisation à laquelle elle est contrainte depuis 1997 la soumet à des recompositions institutionnelles. Elle devra sortir du modèle agro-industriel autocentré pour évoluer vers des perspectives d’autonomisation et de différenciation des acteurs. Or cette transition semble marquée par des tensions entre les acteurs de la filière. La présente étude1 se veut un état des lieux des premiers signaux des mutations observables dans cette filière. Elle repose sur l’hypothèse suivante : les tensions résultent de négociations et de renégociations des formes de coordination qu’implique la nouvelle donne et annoncent une diversité plus marquée dans le « paysage productif ».

  14. Effects of Interfacial Reaction on the Radial Displacement of Oil by Alkaline Solutions Effets des réactions interfaciales sur le déplacement radial de l'huile par les solutions alcalines

    Directory of Open Access Journals (Sweden)

    Nasr-El-Din H. A.

    2006-11-01

    'eau, de géométrie radiale. Pour visualiser le processus de déplacement, on utilise un milieu poreux constitué de perles de verre fritté placées entre deux plaques de verre. Le milieu est initialement saturé avec la phase huileuse, à savoir l'huile de paraffine (non réactive, ou l'huile de paraffine enrichie de 1 % en poids d'acide linoléique (réactif. On étudie expérimentalement les effets du débit de l'injection et de la concentration en NaOH dans la phase aqueuse sur le schéma du déplacement. On mesure également la récupération en volume d'huile à l'épreuve de la filtration. Des mesures de tension interfaciale (IFT du système réactif ont été prises à l'aide d'un tensiomètre à goutte tournante. Une chute importante de la tension interfaciale traduit la réaction chimique à l'interface entre l'acide linéoléique de la phase huileuse et la soude NaOH de la phase aqueuse. On a également trouvé que l'évolution de la tension interfaciale IFT par rapport au temps dépendait de la concentration en NaOH, avec une activité interfaciale maximum (IFT minimum pour une concentration de 0,1 % de NaOH en poids. Les essais de déplacement font apparaître un changement significatif des schémas de déplacement au cours de la récupération secondaire du système réactif par rapport à ceux du système non réactif. Une chute significative de la récupération par filtration est obtenue pour les systèmes réactifs, particulièrement pour les débits d'injection élevés. On a trouvé que la récupération du système réactif variait suivant la concentration de NaOH dans la phase aqueuse, avec une récupération minimum pour 0,1 % de NaOH en poids.

  15. Caractérisation chimique et évaluation de l’activité biologique de certaines espèces de Daucus de la région de Tlemcen (Algérie)

    OpenAIRE

    Meliani, Nawel

    2014-01-01

    La région de l’ouest Algérien et particulièrement Tlemcen est riche en Plantes Aromatiques et Médicinales (PAM) dont les huiles essentielles sont susceptibles d’être utilisées dans différents domaines. La composition de ces dernières permet de les caractér iser, d’en évaluer la qualité, de mettre en évidence une éventuelle spécificité locale. L’objectif principal de cette étude est : (i) d’accroître notre connaissance sur la composition chimique des huiles essentielles et d’évalue...

  16. Present time

    CERN Document Server

    Romero, Gustavo E

    2014-01-01

    The idea of a moving present or `now' seems to form part of our most basic beliefs about reality. Such a present, however, is not reflected in any of our theories of the physical world. I show in this article that presentism, the doctrine that only what is present exists, is in conflict with modern relativistic cosmology and recent advances in neurosciences. I argue for a tenseless view of time, where what we call `the present' is just an emergent secondary quality arising from the interaction of perceiving self-conscious individuals with their environment. I maintain that there is no flow of time, but just an ordered system of events.

  17. Technologies for Fire and Damage Control and Condition Based Maintenance

    Science.gov (United States)

    2011-12-01

    maintenance selon l’état », un système CBM pouvant évaluer en temps réel la charge entière en huiles du navire pour le personnel de bord ou le gestionnaire du...lubrifiantes essentielles permettra aux mécaniciens de remplacer les lubrifiants au besoin, au lieu de le faire selon un calendrier fixe. Dans le

  18. Turbine Engine Testing.

    Science.gov (United States)

    1981-01-01

    coax lus i (sust Pur oviun. 2.2. Caract6r istique essentielle des essa is roacteur 1 l’aviuno(_ Les essa is A 1 avionnage sont caraclerimen par 1...centrifugation. La centrale eat munie d’un Echangeur huils / eau. Lea pompes sont doubldes pour des raisons de sdcuritd et en cas de panne Electrique le...lea mesures effectudes sur les parties tournantes, essentiellement des contraintes Bur lea aubages. Des sondes mobiles de pression ou de tempdrature t

  19. Could radioactivity have played a major role in the evolution of life?; La radioactivite aurait-elle ete la cause d'une etape essentielle dans l'evolution des etres vivants?

    Energy Technology Data Exchange (ETDEWEB)

    Vendryes, G.

    2010-09-15

    A recent discovery shows the presence of the remains of multicellular organisms in rocks dating back 2.1*10{sup 9} years which is far older than acknowledged till now. The discovery took place in Gabon near the Oklo natural reactor. The author raises the hypothesis that the passage from unicellular to multicellular organisms may have been triggered by the radiation released by uranium which was present in water at that time and began to accumulate in the sediment layers that will form the basis of the Oklo reactor millions of years later. (A.C.)

  20. CATCHY PRESENTATIONS

    DEFF Research Database (Denmark)

    Eriksen, Kaare; Tollestrup, Christian; Ovesen, Nis

    2011-01-01

    An important competence for designers is the ability to communicate and present ideas and proposals for customers, partners, investors and colleagues. The Pecha Kucha principle, developed by Astrid Klein and Mark Dytham, has become a widely used and easy format for the presentation of new concepts...

  1. Evaluation, au laboratoire, du pouvoir dispersant d'une huile pour moteurs à essence et relation avec les résultats obtenus dans la séquence VE Laboratory Evaluation of the Dispersive Power of Gazoline Engines Oils and Relation with Sequence Ve Test Results

    Directory of Open Access Journals (Sweden)

    Hipeaux J. C.

    2006-11-01

    Full Text Available L'évaluation du pouvoir dispersant d'une huile pour moteurs à essence est incluse dans les spécifications internationales telles que les spécifications du Comité des Constructeurs du Marché Commun (CCMC et les spécifications de l'American Petroleum Institute (API. Cette évaluation est effectuée à partir d'essais longs, sévères et coûteux sur moteurs au banc. Il s'agit des essais sur moteurs Mercedes M102E (niveaux CCMC G4 et G5 et Ford Pinto 2,3l (niveaux API SG et SH. Le coût de ces essais nécessite l'utilisation, au laboratoire, de tests de présélection des lubrifiants qui soient fiables. Le test le plus employé, pour l'évaluation du pouvoir dispersant d'une huile pour moteur, est l'essai à la tache . Il est effectué en présence de polluants provenant d'une huile de moteur Diesel enrichie en matières charbonneuses (tableaux 1 et 4, fig. 2. Cependant, certaines technologies d'additifs, qui donnent de bons résultats dans cet essai, donnent de mauvais résultats sur essais moteurs et inversement (tableau 2. Dans la Séquence VE, d'une durée de 288 h, l'huile est soumise à différents cycles de température (tableau 3. Si l'on suit, par l'essai à la tache, l'évolution du pouvoir dispersant de cette huile, en fonction du temps d'essai, on décrit les courbes représentées figure 1. Les méthodes OXYDISP et POTDISP que nous proposons dans cet article, permettent d'obtenir les mêmes évolutions et le même classement des produits que lors de l'essai moteur. Ces méthodes sont basées sur l'association de deux séquences successives. La première séquence consiste en un vieillissement préalable du lubrifiant par oxydation artificielle à haute température (160 ou 180°C (tableau 5. La seconde séquence correspond à l'évaluation du pouvoir dispersant du lubrifiant, en cours et en fin d'oxydation, par réalisation d'essais à la tache. L'huile oxydée subit alors un traitement particulier, par pollution artificielle,

  2. La conversion des résidus et huiles lourdes : au carrefour du thermique et du catalytique Conversion of Residues and Heavy Oils At the Crossroads of Thermal Cracking and Catalytic Reactions

    Directory of Open Access Journals (Sweden)

    Le Page J. F.

    2006-11-01

    Full Text Available Cet article passe en revue les diverses familles de procédés de conversion des résidus et huiles lourdes. Tous les résultats semblent converger pour accréditer l'idée que dans tous ces procédés, y compris les procédés dits catalytiques, l'essentiel de la conversion des espèces de poids moléculaire élevé, résines et asphaltènes, procède par mécanisme radicalaire : la clef de la conversion profonde, c'est paradoxalement la maîtrise de la condensation radicalaire de ces espèces. Hydrogène seul, hydrogène en présence de solvant donneur, d'additifs ou encore mieux de catalyseurs, sont les armes dont dispose tout raffineur pour affirmer cette maîtrise, dans la mesure où il ne tient pas à fabriquer du coke. Tous ces procédés de conversion des résidus donnent par ailleurs naissance à des produits craqués dont la nature et la distribution rappellent celles des produits de première distillation du pétrole brut dont est issu le résidu soumis au craquage. This article reviews the different families of conversion processes for residues and heavy oils. All the results seem to converge to support the idea that in all these processes, including so-called catalytic processes, most of the conversion of high-molecular-weight species (resins and asphaltenes operates by a radical mechanism. The key to in-depth conversion is, paradoxically, the mastery of the radical condensation of these species. Hydrogen alone, hydrogen in the presence of a donor solvent, of additives or, better yet, of catalysts, are the arms at the disposal of all refiners to assert this mastery, to the extent that they do not want to manufacture coke. All such conversion processes for residues also give rise to cracked products whose nature and distribution recall those of first-distillation products of crude oil, from which the residue comes that is subjected to cracking.

  3. Information Presentation

    Science.gov (United States)

    Holden, Kritina L.; Thompson, Shelby G.; Sandor, Aniko; McCann, Robert S.; Kaiser, Mary K.; Adelstein, Barnard D.; Begault, Durand R.; Beutter, Brent R.; Stone, Leland S.; Godfroy, Martine

    2009-01-01

    The goal of the Information Presentation Directed Research Project (DRP) is to address design questions related to the presentation of information to the crew. In addition to addressing display design issues associated with information formatting, style, layout, and interaction, the Information Presentation DRP is also working toward understanding the effects of extreme environments encountered in space travel on information processing. Work is also in progress to refine human factors-based design tools, such as human performance modeling, that will supplement traditional design techniques and help ensure that optimal information design is accomplished in the most cost-efficient manner. The major areas of work, or subtasks, within the Information Presentation DRP for FY10 are: 1) Displays, 2) Controls, 3) Procedures and Fault Management, and 4) Human Performance Modeling. The poster will highlight completed and planned work for each subtask.

  4. Information Presentation

    Science.gov (United States)

    Holden, K.L.; Boyer, J.L.; Sandor, A.; Thompson, S.G.; McCann, R.S.; Begault, D.R.; Adelstein, B.D.; Beutter, B.R.; Stone, L.S.

    2009-01-01

    The goal of the Information Presentation Directed Research Project (DRP) is to address design questions related to the presentation of information to the crew. The major areas of work, or subtasks, within this DRP are: 1) Displays, 2) Controls, 3) Electronic Procedures and Fault Management, and 4) Human Performance Modeling. This DRP is a collaborative effort between researchers at Johnson Space Center and Ames Research Center.

  5. Recommandations essentielles de sécurité relatives au travail du personnel des laboratoires géologiques de chantier Essential Safety Recommendations Concerning Work by Personnel in Well Site Mud Logging Units

    Directory of Open Access Journals (Sweden)

    Chambre Syndicale du Pétrole

    2006-11-01

    storage, handling and disposal of chemicals commonly present in such units. Nineteen simplified prevention data sheets review the risks that such chemicals entail for the personnel and specify the first aid to be practiced. The last two appendixes define classified zones for onshore and offshore drilling.

  6. Voting Present

    Directory of Open Access Journals (Sweden)

    James Lo

    2013-12-01

    Full Text Available During his time as a state senator in Illinois, Barack Obama voted “Present” 129 times, a deliberate act of nonvoting that subsequently became an important campaign issue during the 2008 presidential elections. In this article, I examine the use of Present votes in the Illinois state senate. I find evidence that Present votes can largely be characterized as protest votes used as a legislative tool by the minority party. Incorporating information from Present votes into a Bayesian polytomous item-response model, I find that this information increases the efficiency of ideal point estimates by approximately 35%. There is little evidence of significant moderation by Obama when Present votes are accounted for, though my results suggest that Obama’s voting record may have moderated significantly before his subsequent election to the U.S. Senate. My results also suggest that because legislative nonvoting may occur for a variety of reasons, naive inclusion of nonvoting behavior into vote choice models may lead to biased results.

  7. Motion of an Oil Droplet Through a Water-Filled Uneven Pore Déplacement d'une gouttelette d'huile à travers un pore irrégulier rempli d'eau

    Directory of Open Access Journals (Sweden)

    Singhal A. K.

    2006-11-01

    motivation de cet article. L'observation de la relation apparemment linéaire entre débits et gradients de pression dans un écoulement polyphasique en milieu poreux, dissimule la vraie nature des phénomènes de déplacement tels que l'écoulement discontinu de Haine, la rupture et la fusion des gouttelettes, etc. La plupart de ces phénomènes ne sont connus que qualitativement. La présente étude constitue une tentative de les décrire quantitativement à partir des calculs approchés admettant un régime quasi stationnaire et pour le cas d'un pore ayant une géométrie idéale donnée. La progression d'une gouttelette d'huile non mouillante le long d'un pore périodiquement convergent-divergent dont l'unité de base est un bicône tronqué, se présente sous un cheminement fluctuant, continu par morceaux et ressemblant à l'écoulement discontinu de Haine. En plus de cet écoulement discontinu, des variations dans le déplacement des gouttelettes peuvent également se produire à cause de leur fragmentation, de leur coalescence ou de l'instabilité de leur configuration interfaciale. Les différentes parties d'une gouttelette peuvent être nécessaires pour s'adapter à diverses courbures et il peut quelquefois arriver qu'elles ne puissent maintenir une courbure moyenne constante partout sur l'interface. Une gouttelette peut donc se fragmenter au passage des étranglements. Certaines parties de gouttelettes éclatées peuvent alors circuler au milieu du pore et parfois fusionner entre elles à certains endroits. Les gouttelettes s'immobilisent chaque fois que les gradients de pression disponibles à travers elles sont insuffisants pour surmonter la pression de seuil présentée par leurs interfaces. Les implications possibles de ces phénomènes dans le piégeage d'huile résiduelle, les hystérésis des courbes de pression capillaire et de perméabilités relatives, et les fluctuations dans les écoulements polyphasiques des fluides en milieu poreux, sont discutés.

  8. Technical presentation

    CERN Multimedia

    FI Department

    2008-01-01

    RADIOSPARES, the leading catalogue distributor of components (electronic, electrical, automation, etc.) and industrial supplies will be at CERN on Friday 3 October 2008 (Main Building, Room B, from 9.00 a.m. to 3.00 p.m.) to introduce its new 2008/2009 catalogue. This will be the opportunity for us to present our complete range of products in more detail: 400 000 part numbers available on our web site (Radiospares France, RS International, extended range of components from other manufacturers); our new services: quotations, search for products not included in the catalogue, SBP products (Small Batch Production: packaging in quantities adapted to customers’ requirements); partnership with our focus manufacturers; demonstration of the on-line purchasing tool implemented on our web site in conjunction with CERN. RADIOSPARES will be accompanied by representatives of FLUKE and TYCO ELECTRONICS, who will make presentations, demonstrate materials and answer any technical questio...

  9. Overview Presentation

    Science.gov (United States)

    Lytle, John

    2001-01-01

    This report provides an overview presentation of the 2000 NPSS (Numerical Propulsion System Simulation) Review and Planning Meeting. Topics include: 1) a background of the program; 2) 1999 Industry Feedback; 3) FY00 Status, including resource distribution and major accomplishments; 4) FY01 Major Milestones; and 5) Future direction for the program. Specifically, simulation environment/production software and NPSS CORBA Security Development are discussed.

  10. Technical presentation

    CERN Multimedia

    FP Department

    2009-01-01

    07 April 2009 Technical presentation by Leuze Electronics: 14.00 – 15.00, Main Building, Room 61-1-017 (Room A) Photoelectric sensors, data identification and transmission systems, image processing systems. We at Leuze Electronics are "the sensor people": we have been specialising in optoelectronic sensors and safety technology for accident prevention for over 40 years. Our dedicated staff are all highly customer oriented. Customers of Leuze Electronics can always rely on one thing – on us! •\tFounded in 1963 •\t740 employees •\t115 MEUR turnover •\t20 subsidiaries •\t3 production facilities in southern Germany Product groups: •\tPhotoelectric sensors •\tIdentification and measurements •\tSafety devices

  11. Geochemical controls of the oils acidity in petroleum reservoirs; Controles geochimiques de l'acidite des huiles dans les reservoirs petroliers

    Energy Technology Data Exchange (ETDEWEB)

    Rouquette, N.

    2004-12-01

    Within the framework of this thesis, we were interested in the study of acid oils. Thus, after having developed an analytical method to separate acids from crude oils, this one was applied to the analysis of several series of acid oils presenting various degrees of biodegradation. In the first chapter devoted to their molecular study, it was shown that the alteration of the organic matter proceeds according to a quasi-stepwise order and that the major part of the carboxylic acids appeared as an Unresolved Complex Mixture. The only identified resolved compounds were apparently not formed by biodegradation of the oil in place but rather seem either to have been incorporated during oil migration, or to correspond to compounds initially present in the reservoir rock. Among those, we isolated and identified by NMR a new higher plant tri-terpenic derivative, the 24-nor,28-lupanoic acid. In the second chapter, a new method to evaluate acidity, applicable to small quantities of oil, was developed. This one is based on the methylation of the acid species by iodo-methane marked with carbon 13. In the case of a series from the Gulf of Guinea tested initially, the enrichment after labelling presents a perfect correlation with the values of acidity measured by the TAN method (for 'Total Acid Number'). The isotopic labelling method was applied later to a broader range of oil samples. As a whole, a linear correlation seems to exist between {sup 13}C labelling and TAN index, which lets consider that this method could represent an interesting alternative to the measurement of the TAN index in oil exploration. (author)

  12. De nouveaux procédés d’extraction des huiles pour des produits finis de haute qualité

    Directory of Open Access Journals (Sweden)

    Parmentier Michel

    2004-11-01

    Full Text Available New concerns have appeared recently from the European and American consumers about quality, safety and environmental impact of the food products. In the particular case of European countries, the coming back of traditional products with a high sentimental value should be noticed. To fit the forthcoming demand of the consumer, the Oils and Fats industry have to develop a new approach based on alternative technologies that may emerge from the research with very specific objectives: no solvents, mild technologies, less energy consumption and final wastes. The purpose of this article is to discuss about the new biological tools capable to generate alternative ways for the oil elaboration: use of enzymes for destructuration of the vegetal or animal tissues and the subsequent utilisation of membrane techniques for the separation and purification steps. These new technologies involving less heat and mechanical stress to the oil, lead to a better “native” quality of the final products. However, fundamental research is needed on the separation mechanisms of those complex mixtures to optimise the process and prepare the transfer to the industrial conditions. The present article reports a contribution on the aqueous extraction of rapeseed oil as an example

  13. Effet de l’huile d’argan sur la contractilité de l’aorte : susceptibilité au stress oxydatif

    Directory of Open Access Journals (Sweden)

    Benajiba N.

    2006-01-01

    Full Text Available The aim of the present study was to evaluate the effect of long-term argan oil administration on vascular responsiveness and susceptibility to H2O2. 16 Wistar rats were divided into 2 groups; control group and treated group receiving 5 ml/kg/day of argan oil. After 8 weeks of treatment, vascular contractility was measured on isolated aortic rings from both groups by addition to the organ bath of cumulative concentration of vasoactive drugs (phenylephrine, acetylcholine and sodium nitroprussiate. In parallel, these isolated aortic rings were exposed to increasing doses of H2O2 (0, 1, 5 and 10 mM for 20 minutes and the residual vascular response to phenylephrine (PE 10−6 M and acetylcholine (Ach 10−6 M was evaluated. Our results show that no significant differences between control and argan oil group were observed. Maximal contraction response to 10−6 MPE was 1.68 ± 0.20 g and 2.14 ± 0.20 g for control and argan oil groups, respectively. In precontracted isolated aortic rings, endothelium dependent relaxation to acetylcholine and endothelium-independent relaxation were not influenced by the diet. Maximal relaxation in response to 10−6M of Ach was 54 % for control group and 47 % for argan oil group. Addition of hydrogen peroxide (H2O2 to the organ bath for 20 minutes led to a dosedependent alteration of vascular reactivity, which was characterized by similar decrease in both the PE-induced contraction and the Ach-induced relaxation in the two experimental groups. These results suggest that argan oil treatment does not influence vascular reactivity nor its sensitivity to the oxidative stress.

  14. Flow boiling of refrigerant-oil mixtures; Transferts de chaleur dans un melange constitue de fluide frigorigene et d'huile

    Energy Technology Data Exchange (ETDEWEB)

    Feidt, M.

    1999-10-13

    The phase out of chlorine containing refrigerants (CFC and HCFC) has led to the introduction of new refrigerants and lubricants to the market. The interest in using HFC fluids as working fluids to replace fluids harmful to the stratospheric ozone layer. The study presents the influence of synthetic oil (POE ISO 68) on flow boiling of refrigerants R134a (pure fluid) and R410A (R32/R125 50%/50%). Local and average heat transfer coefficients and pressure drops have been measured for a smooth horizontal tube. The distribution of the heat transfer coefficient at the inner wall has been obtained from solving the inverse heat conduction problem (IHCP) and resulted in a local combination of nucleate and convective contributions to flow boiling. Local heat transfer coefficients have been averaged and displayed as a function of the vapour quality. For R134a: small amounts of oil (1% to 6%) in the liquid phase increased the heat transfer coefficient at low and intermediate vapour qualities (less than 0.60) compared to pure fluid. However a hugh reduction of the heat transfer has been observed at higher vapour qualities. For R410A : oil dramatically decreases the heat transfer coefficient compared to pure fluid. Pressure drops are also affected by small amounts of lubricant: an important increase has been noted for both fluids. Available design methods for flow boiling heat transfer coefficient (superposition, enhancement, asymptotic) badly predict the experimental results. Nevertheless a new design method accounting for flow patterns has shown good agreements. The influence of the lubricant on the heat transfer is discussed and a new proposition is made to calculate pressure drops. (author)

  15. Quelles questions éthiques posent la production de palmier à huile et la recherche sur les biocarburants ?

    Directory of Open Access Journals (Sweden)

    de Lattre-Gasquet Marie

    2010-11-01

    Full Text Available At present, palm oil and biofuels arouse both hopes and fears. Palm oil, which is very important for the economy of several Asian and African countries and is used mostly by the food industry and oleochemisty, and very little as for biofuels, has positive and negative impacts on the use of land and the climate. Its production is often criticized from a social point of view and the quality of its oil is discussed from a nutritional point of view. A number of devices are set to encourage firms growing palm trees to have an ethical and deontological approach. Agricultural research institutions (and researchers individually are increasingly constrained by ethical issues related to biofuels. In France, the Joint Ethics Committee of Inra (Institut national de la recherche agronomique and Cirad (Centre de coopération internationale en recherche agronomique pour le développement has recently worked on this question. Biofuels appear as a revealing (in the chemical sense of a crack in the ethos of those institutions. Cirad and Inra both carry out mission-oriented research. For years, researchers have worked to increase productivity and agricultural revenues, improve food security and market stabilization, reduce inequalities, etc. This mission-oriented research was a moral bail to agricultural productivity. Environmental damages provoked by agriculture and development policies leading to a wide range of problems are undermining the ethos of the two research institutions. Biofuels research, in large terms, is revealing difficulties as different research issues are competing among themselves. The Committee recommended revising the meaning of “mission-oriented research” and made specific recommendations on how to deal with some ethical questions related to biofuels research.

  16. REPONSES DES INDUSTRIELS AUX PREOCCUPATIONS DES NUTRITIONNISTES Modèle prédictif de l’isomérisation trans des acides gras polyinsaturés au cours de la désodorisation industrielle des huiles végétales

    Directory of Open Access Journals (Sweden)

    Henon Georges

    2000-01-01

    Full Text Available Le modèle mathématique présenté concerne l’isomérisation géométrique des acides gras polyinsaturés se produisant au cours de la dernière étape de raffinage des huiles appelée désodorisation. Ce modèle a été élaboré dans le cadre du projet européen TransLinE (trans a-linolenic acid in Europe relatif à l’étude de l’impact nutritionnel des isomères trans de l’acide a-linolénique sur la santé. Le rôle de la société Lesieur dans cette étude était de produire une huile spécialement isomérisée répondant aux critères suivants : – teneur en isomères trans de l’acide a-linolénique égale à 5% ; – teneur minimum en isomères trans de l’acide linoléique (à défaut de la valeur zéro irréalisable, un rapport transC18 :3/transC18 :2 de 10 a été une cible acceptée ; – composition des isomères identique à celle obtenue par désodorisation. Cette dernière contrainte impliquait un traitement thermique, donc un raffinage de l’huile suivi d’une désodorisation dans des conditions à définir. Plutôt que d’opérer par tâtonnements, il a été décidé de modéliser l’isomérisation géométrique au cours de cette désodorisation qui, rappelons-le, est un traitement thermique sous pression réduite avec injection de vapeur (industriellement ou d’azote. Le matériel utilisé pour ces expérimentations est un désodoriseur de laboratoire d’une capacité de 3,2 l chauffé électriquement par des colliers enveloppants. L’azote et/ou la vapeur d’eau sont injectés en fond de réacteur au travers d’une plaque perforée. La vapeur et les composés volatils entraînés sont condensés par passage dans un piège froid maintenu à – 80 °C. La pression résiduelle en cours de désodorisation était de l’ordre de quelques millimètres de mercure ( 3 mmHg. Le refroidissement de l’huile en fin d’opération est assuré par une circulation d’eau dans un serpentin intérieur. Les d

  17. Pore-Level Investigation of Heavy Oil Recovery using Steam Assisted Gravity Drainage (SAGD Étude à l’échelle des pores de la récupération d’huiles lourdes par drainage gravitaire assisté par injection de vapeur (SAGD

    Directory of Open Access Journals (Sweden)

    Mohammadzadeh O.

    2010-12-01

    entrapment of steam due to the capillarity followed by condensation, steam condensation at the interface due to temperature gradient, and snap-off of liquid films are also illustrated using glass micromodels in pore-level visualization experiments. L’application réussie du procédé de drainage gravitaire assisté par injection de vapeur à l’aide de puits horizontaux lors de divers essais de champ, essentiellement au Canada, montre qu’on peut atteindre un taux de récupération élevé et des rapports vapeur injectée/pétrole récupéré économiquement viables. Le procédé de récupération par SAGD a été développé sur le plan théorique, testé sur pilote et commercialisé, tout cela au Canada; il reste cependant encore plusieurs problèmes techniques à résoudre dans ce procédé. Les phénomènes qui se développent à l’échelle des pores lors de la récupération d’huiles lourdes à l’aide du procédé SAGD ne sont pas encore très bien compris, ce qui conduit à intégrer la physique du processus au niveau des pores dans des modèles mathématiques. L’étude à l’échelle des pores des phénomènes physiques concernant la distribution des fluides et les types d’écoulement dans le milieu poreux dans ce procédé devrait apporter une nette amélioration de la compréhension des phénomènes macroscopiques observés aussi bien en laboratoire que sur le terrain. L’objectif principal de cet article est l’étude visuelle et la description des phénomènes à l’échelle des pores par l’utilisation d’un micromodèle en verre. Des expériences de SAGD ont été effectuées au laboratoire sur des micromodèles de réseaux capillaires gravés sur des plaques de verre qui, au départ, ont été saturés d’huile lourde. Ces expériences furent réalisées dans une chambre à vide pour éviter des pertes de chaleur excessives vers l’extérieur. Les premiers résultats montrent que lorsque l’interface huile lourde/vapeur est établie, un

  18. Variabilité selon le captureur de l'efficacité de répulsifs à base d'huiles végétales dans la protection individuelle contre les piqûres de Simulium damnosum s. l.

    Directory of Open Access Journals (Sweden)

    Sylla M.

    2002-12-01

    Full Text Available Dans le présent article, nous faisons état de la variabilité selon le captureur de l'efficacité de répulsifs à base d'huiles végétales appliquées sur la peau contre les piqûres de Simulium damnosum s. l. Les expérimentations ont été effectuées en zones de savane (Chaussée-Niaka et de forêt (Soubré de Côte d'Ivoire. Les formulations (lotions, crèmes] testées lors de ces travaux ont été obtenues à partir d'huiles d'amande de palme (Elaeis guineensis, de coco (Cocos nucifera et de gobi (Carapa procera. La technique classique de capture sur homme à l'aide de tubes à hémolyse en matière plastique a été utilisée. Pour chaque journée d'expérimentation, un captureur non traité (jambes non enduites de répulsif servait de témoin. Les résultats indiquent qu'en savane, quels que soient le répulsif et le captureur, la densité simulidienne se situait de 1 à 4, 1 à 6 et de 2 à 10 simulies par homme et par jour lorsque le captureur était respectivement protégé avec le coco, le palmiste et le gobi. Avec les mêmes répulsifs, en zone de forêt, l'agressivité simulidienne variait de 9 à 16, de 2 à 30 et de 8 à 49 piqûres par jour. En comparaison, le témoin recevait de 67 à 90 et de 310 à 533 piqûres par jour, respectivement en zones de savane et de forêt. Malgré les variations importantes dans le nombre de simulies capturées en fonction du captureur choisi, nos résultats montrent que quels que soient le répulsif et l'espèce simulidienne, une protection similaire est conférée à tous les captureurs. Ils indiquent également que le recours à des substances naturelles locales, utilisées comme répulsifs en application dermique, est l'une des meilleures méthodes de protection personnelle contre les simulies.

  19. Synthèse, caractérisation et application aux huiles lubrifiantes d'additifs polymères phosphosoufrés améliorants de VI, antiusure et extrême pression Phosphosulphurized Antiwear and Extreme-Pressure Vi Polymer Additives, Synthesis, Characterization and Lubricant Applications

    Directory of Open Access Journals (Sweden)

    Keromest C.

    2006-11-01

    Full Text Available Des copolymères de méthacrylates d'alkyle (PMA et un copolymère d'éthylène et de propylène (OCP, utilisables comme additifs améliorants d'indice de viscosité des huiles lubrifiantes, ont été préparés en leur incorporant des motifs fonctionnels anti-usure et extrême pression (AU-EP, sous la forme d'esters dithiophosphoriques ; les performances mécaniques des produits ont été pré-évaluées au moyen d'une machine quatre billes. Polyalkylmetlhacrylates (PMA and an ethylene/propylene copolymer (OCP, usable both as lubricant VI improver and antiwear extreme-pressure (AW-EP additives, were prepared by introducing AW-EP functional moieties on PMA and OCP back-bones under the form of dialkyldithiophosphoric esters; mechanical performances of these polymers were pre-assessed by means of a four-ball machine.

  20. BioDiesel as Additive in High Pressure and Temperature Steam Recovery of Heavy Oil and Bitumen Utilisation d’un biogazole comme additif pour la récupération d’huile lourde et de bitume par injection de vapeur à hautes pression et température

    Directory of Open Access Journals (Sweden)

    Babadagli T.

    2012-05-01

    compositions of bioDiesel in steam at 1.8 MPa pressure and 205°C are at least one order of magnitude higher than the requested bioDiesel dosages. Further tests are planned by reducing bioDiesel dosages to about 0.5 to 1.0 g-bioDiesel/kilogram-steam and by monitoring the solubility of bioDiesel in bitumen. L’utilisation d’additifs pour améliorer l’efficacité des procédés de récupération thermique d’huile lourde et de bitume a été étudiée de manière approfondie pendant des décennies. Deux types courants d’additifs utilisés dans des applications thermiques, principalement en récupération assistée par injection de vapeur, consistent en des solvants et des agents tensioactifs. L’utilisation de solvants présente des inconvénients du fait de leur coût élevé et de la difficulté à les récupérer. Le coût et la stabilité des agents tensioactifs aux température et pression de réservoir limitent leur usage. Nous proposons l’utilisation d’un biogazole tel qu’un ester méthylique d’acides gras en tant qu’additif tensioactif pour réduire la tension interfaciale huile lourde/bitume-eau dans les procédés de récupération assistée par injection de vapeur. Les avantages de l’utilisation d’un biogazole en tant qu’additif tensioactif consistent en ce que le biogazole est chimiquement stable aux pression et température d’exploitation du réservoir, qu’il ne dégrade pas la qualité des hydrocarbures produits ni la composition chimique des eaux de production et que son utilisation est économiquement viable. Nous avons mené une série d’expériences de récupération assistée de bitume par injection de vapeur afin de clarifier le potentiel de récupération additionnelle et la capacité d’amélioration d’efficacité du biogazole. De la vapeur à 1,8 MPa et 205 °C a été utilisée au cours de ces essais, à un débit de 900 g/h. Le milieu poreux utilisé consistait en un sable pétrolifère à teneur normale en bitume

  1. Recuperação de áreas desflorestadas da Amazônia: será pertinente o cultivo da palma de óleo (Dendê? Recovery of deforested areas in Amazonia: would cultivation of oil palm be relevant? Récupération des zones déboisées en Amazonie:la culture du palmier à huile serait-elle une solution?

    Directory of Open Access Journals (Sweden)

    Bertha K. Becker

    2010-01-01

    Full Text Available O artigo discute a pertinência – ou não – de apoiar a expansão da lavoura do dendê na Amazônia, como uma das possibilidades de recuperar áreas desflorestadas e promover o desenvolvimento regional. Responde a três questões: quais as vantagens e quais os riscos associados à lavoura do dendê? Qual a relação entre zoneamento e desenvolvimento na Amazônia? Que desafios devem ser enfrentados como condição para a implementação dessa atividade?L'article discute la pertinence - ou non – d'un appui à l'expansion des plantations de palmiers à huile en Amazonie, une des possibilités pour récupérer les zones déboisées et promouvoir le développement régional. Il répond à trois questions: quels sont les avantages et quels sont les risques associés à la plantation de palmiers à huile? Quelle est la relation entre le zonage et le développement de l'Amazonie? Quels défis doivent être relevés pour permettre la mise en œuvre de cette activité?The article discusses the relevance - or otherwise - to support the expansion of oil palm plantation in the Amazon, one of the possibilities to recover deforested areas and promote regional development. Answers to three questions as sought: what are the advantages and what are the risks associated with oil palm plantation? What is the relationship between zoning and development in the Amazon? Whhat challenges should be addressed as a condition for implementation of this activity?

  2. L’huile de colza : une huile multi-usages en devenir

    Directory of Open Access Journals (Sweden)

    Vigneron Pierre-Yves

    2006-09-01

    Full Text Available Ageing tests have been carried out with refined rapeseed oil in different conditions (transparent and non transparent bottles, moderate and dim natural light exposure, room and refrigerator temperature. The results mainly based on sensory evaluation show that rapeseed oil keeps a rather good quality if kept in a non transparent bottle and best if stored in the refrigerator. Results of frying tests under household conditions show that chemical degradation of rapeseed oil is lower than for sunflower oil. But for both oils, the level of degradation compounds are below the 25% polar compounds limit, assuming that the consumer does respect the recommendations on the label i.e. temperature ≤ 180°C and not more than 10 fryings. Although the French regulation does not allow until now to use oils for frying purpose with more than 2% of linolenic acid of their fatty acid composition, results demonstrate that rapeseed oil could be used worthwhile for frying. However on the basis of room odor tests, rapeseed oil might not be accepted by some consumers due to its fishy odor during frying operation. Therefore from a marketing point of view, it is advisable to limit the use of rapeseed oil to seasoning and cooking purposes.

  3. Hydrocraquage sous pression d'une huile de soja : procédé d'étude et allure générale de la transformation Soybean Oil Hydrocracking under Pressure: Process and General Aspect of the Transformation

    Directory of Open Access Journals (Sweden)

    Nunes P. P.

    2006-11-01

    Full Text Available Un procédé d'étude de l'hydrocraquage des huiles végétales en autoclave est décrit. Les principaux objectifs de cette étude sont relatifs à la transformation de l'huile de soja (composé modèle en essence et gazole, en limitant la formation de polymères et de coke. L'analyse des gaz et la chromatographie haute résolution de deux fractions résultant de la distillation sous vide de la phase liquide ont permis de mettre en évidence les principales étapes de l'hydrocraquage. Pour cette première approche du processus général, trois types d'hydrocraquages ont été utilisés : thermique et en présence d'un oxyde ou d'un catalyseur bifonctionnel performant (hydrogénant/craquant. Dans ce dernier cas, l'hydrogénation des doubles liaisons des chaînes latérales des triglycérides a été mise en évidence pendant le chauffage du réacteur jusqu'à environ 673 K, température à laquelle s'initie le véritable hydrocraquage. A cette température sont observées la décarbonylation/décarboxylation des acides gras (précédemment issus de la coupure des liaisons ester des triglycérides et une hydrogénolyse marquée en présence d'un catalyseur métallique. Il en résulte principalement des alcanes dont la structure linéaire est celle des acides gras initiaux. Le rendement global brut peut atteindre 83 % dans les conditions de température et de pression choisies, y inclus le pourcentage en fraction gazeuse (CO, CO2, C1-C4 A laboratory process for studying the hydrocracking of vegetable oils in a high-pressure batch reactor is described. The main goals of this study concern the transformation of soybean oil (used as a model into gasoline and diesel fuel fractions while limiting polymerization and coking. Gas analysis and high-resolution chromatography of two liquid fractions resulting from vacuum distillation were used to determine the main steps in the hydrocracking process. For this initial study of the general process, the three

  4. Abstract Presentations: What Do SGIM Presenters Prefer?

    OpenAIRE

    Tulsky, Asher A.; Kouides, Ruth W

    1998-01-01

    We surveyed physicians presenting abstracts at the 1995 Society of General Internal Medicine annual meeting to determine whether the oral or poster format better achieved their presentation goals. Poster presentations better met respondents' objectives for feedback and criticism and for networking and developing collaborative projects, while oral presentations better met their objectives for national visibility and sharing knowledge within one's field. Sixty-nine percent of respondents prefer...

  5. Etude phytochimique, activités antimicrobiennes et antioxydantes de Saccocalyx satureioïdes, Salvia verbenaca et Teucriumpolium de la région Ouest d'Algérie

    OpenAIRE

    BELMEKKI, Nacéra née TEBICHEK

    2014-01-01

    Résumé L'étude des espèces Saccocalyx satureioïdes, Teucrium polium et Salvia verbenaca appartenant à la famille des Lamiaceae, a porté sur un screening phytochimique visant à caractériser les différentes familles de composés chimiques contenues dans leur partie aérienne, puis l'extraction sélective des classes dont les tests sont positifs. L'analyse des huiles essentielles de Saccocalyx saiureioïdes, Teucrium polium par chromatographie gazeuse couplée à la spectrométrie de ...

  6. Etude phytochimique et activités biologiques de quatre espèces camerounaises de la famille des Myrtaceae: Eucalyptus saligna Sm., Callistemon viminalis W., Syzygium guineense W. et Syzygium aromaticum M. et P.

    OpenAIRE

    Djoukeng, Jules Désiré; Tabacchi, Raffaele

    2006-01-01

    Les plantes de la famille des Myrtaceae sont très aromatiques, avec une abondance en huile essentielle d'où l'usage médicinal. Certaines plantes de cette famille sont utilisées traditionnellement dans la conservation des denrées en stockage dans les pays en voies de développement. Afin de mieux comprendre l'utilisation traditionnelle de Eucalyptus saligna Sm., Callistemon viminalis G., Syzygium guineense W. et Syzygium aromaticum Merr. et Perry (Myrtaceae) nous avons entrepris l'étude phytoch...

  7. Presentation rubric: improving faculty professional presentations.

    Science.gov (United States)

    Hayne, Arlene N; McDaniel, Gretchen S

    2013-01-01

    This article describes the content of a presentation evaluation rubric for use in the development and improvement in faculty performance to enhance learning. Lectures or professional presentations require skills that can be learned through the use of evidence-based practices for all forms of public speaking. A core competency of nursing faculty is to serve as a role model in skilled oral communication. The use of an evaluation presentation rubric can increase faculty competency in this area. © 2013 Wiley Periodicals, Inc.

  8. Making your presentation fun: creative presentation techniques

    Energy Technology Data Exchange (ETDEWEB)

    KEENEN,MARTHA JANE

    2000-05-18

    What possesses someone to volunteer and go through hoops and red tape to make a presentation at a conference? For that matter, why does anyone ever present anything to anyone? Actually, presentations are a fact of life and there are many reasons for doing a presentation and doing it well. New and existing staff need training and orientation to the way things are done here. Handing all of them a manual and hoping they read it is pretty much a waste of paper. On the other hand, an effective, entertaining and upbeat presentation on the relevant topics is more likely to stick with those people. They will even have a name and face to remember and seek out when they have an issue on or with that topic. This can be a very effective beginning for networking with new peers. The presenter is seen as knowledgeable, as a source of information on company topics and possibly evaluated as a potential mentor or future manager. Project staff and/or peers benefit from clear, concise, presentations of topical knowledge. This is one way that a group working on various aspects of the same project or program can stay in touch and in step with each other. Most importantly, presentations may be the best or only door into the minds (and budgets) of management and customers. These presentations are a wonderful opportunity to address legal and compliance issues, budget, staffing, and services. Here is a chance, maybe the only one, to demonstrate and explain the wonderfulness of a program and the benefit they get by using the services offered most effectively. An interactive presentation on legal and compliance issues can be an effective tool in helping customers and/or management make good risk management decisions.

  9. Develop your presentation skills

    CERN Document Server

    Theobald, Theo

    2016-01-01

    Going beyond handling nerves and presenting PowerPoint slides, the third edition of "Develop Your Presentation Skills "offers practical advice on developing a captivating presentation, constructing compelling content, and boosting self-confidence. The book includes three new chapters on delivering a "stripped down"presentation, using new media to engage with the audience, and handling being asked to present on short notice."

  10. Teaching Presentation Skills

    Science.gov (United States)

    Baker, William H.; Thompson, Michael P.

    2004-01-01

    Effective teaching of presentation skills focuses on the most important element of the presentation--the message itself. Some instructors place the heaviest emphasis on the messenger (the presenter) and focus their presentation feedback on all the presenter is doing wrong--saying "um," gesturing awkwardly, and so forth. When students receive this…

  11. Workshop Presentations: Overviews

    Data.gov (United States)

    National Aeronautics and Space Administration — These slides were presented at the AePW, April 21-22, 2012. Additional presentations can be found on each of the associated analysis webpages. Separate pages contain...

  12. Marketing through Video Presentations.

    Science.gov (United States)

    Newhart, Donna

    1989-01-01

    Discusses the advantages of using video presentations as marketing tools. Includes information about video news releases, public service announcements, and sales/marketing presentations. Describes the three stages in creating a marketing video: preproduction planning; production; and postproduction. (JOW)

  13. Make Your Presentation Powerful

    Science.gov (United States)

    Palmer, Erik

    2015-01-01

    "I was planning on doing a lot of work today during your presentation, but I couldn't get anything done. I just had to pay attention!" The author received this unexpected feedback from a teacher at the end of a presentation he gave, and although he considered it a compliment, it made him reflect on the dire state of presentations in…

  14. Presenting Food Science Effectively

    Science.gov (United States)

    Winter, Carl K.

    2016-01-01

    While the need to present food science information effectively is viewed as a critical competency for food scientists by the Institute of Food Technologists, most food scientists may not receive adequate training in this area. Effective presentations combine both scientific content and delivery mechanisms that demonstrate presenter enthusiasm for…

  15. Rotating Poster Presentations

    Science.gov (United States)

    Lagares, Manuel; Reisenleutner, Sandra

    2017-01-01

    Oral presentations are a common practice in foreign language classes, often used to assess students' speaking skills. Usually, the presentations are delivered by students in front of the class, often with PowerPoint slides or Prezi as support. However, frequently the audience does not engage with the presentation and thus, the benefits of this…

  16. Innovative presentations for dummies

    CERN Document Server

    Anthony, Ray

    2014-01-01

    Be the speaker they follow with breakthrough innovative presentations Innovative Presentations For Dummies is a practical guide to engaging your audience with superior, creative, and ultra-compelling presentations. Using clear language and a concise style, this book goes way beyond PowerPoint to enable you to reimagine, reinvent, and remake your presentations. Learn how to stimulate, capture, and hold your audience in the palm of your hand with sound, sight, and touch, and get up to speed on the latest presentation design methods that make you a speaker who gets audiences committed and acting

  17. Behavioural present value

    OpenAIRE

    Krzysztof Piasecki

    2013-01-01

    Impact of chosen behavioural factors on imprecision of present value is discussed here. The formal model of behavioural present value is offered as a result of this discussion. Behavioural present value is described here by fuzzy set. These considerations were illustrated by means of extensive numerical case study. Finally there are shown that in proposed model the return rate is given, as a fuzzy probabilistic set.

  18. CERN Electronics Pool presentations

    CERN Multimedia

    2011-01-01

    The CERN Electronics Pool has organised a series of presentations in collaboration with oscilloscope manufacturers. The last one will take place according to the schedule below.   Time will be available at the end of the presentation to discuss your personal needs. The Agilent presentation had to be postponed and will be organised later. -     Lecroy: Thursday, 24 November 2011, in 530-R-030, 14:00 to 16:30.

  19. Presentation skills for nurses.

    Science.gov (United States)

    Foulkes, Mark

    2015-02-20

    This article emphasises the importance of effective presentation skills. Such skills allow nurses to share knowledge and expertise and to communicate clearly in a range of workplace scenarios. Nurses are increasingly being asked to present in formal and informal situations, such as conferences, poster presentations, job interviews, case reports and ward-based teaching. This article explores the principles underpinning the development of these skills, discusses the situations in which they could be applied and demonstrates how nurses might improve and develop as presenters.

  20. Conjugando el presente

    Directory of Open Access Journals (Sweden)

    Héctor Rojas Herazo

    1968-06-01

    Full Text Available La añoranza suele ser, casi siempre, la línea critica de menor resistencia. El lema de que "todo tiempo pasado fue mejor" tiene un poco la culpa. En cualquier orden del conocimiento el pasado sigue el verdadero presente. Ese presente en que nos gusta respirar y vivir. Nada de compromiso circundante. Nada de inmediatez.

  1. Presentism meets black holes

    CERN Document Server

    Romero, Gustavo E

    2014-01-01

    Presentism is, roughly, the metaphysical doctrine that maintains that whatever exists, exists in the present. The compatibility of presentism with the theories of special and general relativity was much debated in recent years. It has been argued that at least some versions of presentism are consistent with time-orientable models of general relativity. In this paper we confront the thesis of presentism with relativistic physics, in the strong gravitational limit where black holes are formed. We conclude that the presentist position is at odds with the existence of black holes and other compact objects in the universe. A revision of the thesis is necessary, if it is intended to be consistent with the current scientific view of the universe.

  2. Impact of the lubricating oil on thermodynamic performances of reversible heat pumps; Impact de l'huile de lubrification sur les performances thermodynamiques des pompes a chaleur reversibles

    Energy Technology Data Exchange (ETDEWEB)

    Youbi-Idrissi, M.

    2003-12-01

    This work deals with the effect of oil on the energy performances of refrigerating systems. To characterise this impact, two thermodynamic properties were studied: the solubility and the enthalpy. Thus, a simple measurement method was presented, allowing to study both transient and steady-state behaviour of various refrigerant/oil pairs. Thus, experimental data were validated and modelled. The suitable use of the solubility curves showed the zeotropic character of the refrigerant/oil mixture, which is directly reflected on the enthalpy calculation. For this property, a thermodynamic model was developed and experimentally validated. Its application led to a new presentation of the Mollier diagram taking into account the oil presence. It was then shown that, among all the circuit elements, the evaporator is the most penalized by the oil presence. Its performances decrease when the circulating mass fraction of oil increases, the superheat decreases and when the refrigerant-oil solubility increases. An experimental study on a reversible heat pump confirmed that if the circulation mass fraction of oil in the machine is lower than 2%, the impact of oil is reduced. Lastly, a local model of a refrigerating unit, initially charged with a zeotropic mixture, allowed to analyse the profiles of temperature, heat transfer coefficient and local composition of the refrigerant along a circuit. (author)

  3. Workshop Presentations: BSCW Analysts

    Data.gov (United States)

    National Aeronautics and Space Administration — These slides were presented at the AePW, April 21-22, 2012. They detail the analytical results generated by each of the participating analysis teams for the...

  4. Workshop Presentations: RSW Analysts

    Data.gov (United States)

    National Aeronautics and Space Administration — These slides were presented at the AePW, April 21-22, 2012. They detail the analytical results generated by each of the participating analysis teams for the...

  5. Workshop Presentations: HIRENASD Analysts

    Data.gov (United States)

    National Aeronautics and Space Administration — These slides were presented at the AePW, April 21-22, 2012. They detail the analytical results generated by each of the participating analysis teams for the HIRENASD.

  6. Fostering oral presentation performance

    NARCIS (Netherlands)

    Ginkel, van Stan; Gulikers, Judith; Biemans, Harm; Mulder, Martin

    2016-01-01

    Previous research revealed significant differences in the effectiveness of various feedback sources for encouraging students’ oral presentation performance. While former studies emphasised the superiority of teacher feedback, it remains unclear whether the quality of feedback actually differs bet

  7. Analysis of oil migration in one and two-stage heat pumps; Analyse de la migration d'huile dans les pompes a chaleur mono- et bi-etagees

    Energy Technology Data Exchange (ETDEWEB)

    Zehnder, M.; Favrat, D.

    2003-07-01

    This final report for the Swiss Federal Office of Energy SFOE describes work done at the Swiss Federal Institute of Technology in Lausanne, Switzerland, as part of the Swiss Retrofit Heat Pump project that examines ways of replacing traditional oil-fired domestic heating systems with heat pumps. The apparatus used to investigate the migration of oil within the refrigeration circuit of a purpose-built air-water heat pump is described. The construction of the heat pump, which could be operated in single or two-stage mode, is described and the results obtained from the investigations are presented. The properties of lubricants used in heat pumps are discussed and the techniques used to measure the oil concentration in the various parts of the refrigeration cycle, which include the use of an infra-red spectrometer, are described.

  8. Blade Testing Trends (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Desmond, M.

    2014-08-01

    As an invited guest speaker, Michael Desmond presented on NREL's NWTC structural testing methods and capabilities at the 2014 Sandia Blade Workshop held on August 26-28, 2014 in Albuquerque, NM. Although dynamometer and field testing capabilities were mentioned, the presentation focused primarily on wind turbine blade testing, including descriptions and capabilities for accredited certification testing, historical methodology and technology deployment, and current research and development activities.

  9. Presenting New Grammar

    Institute of Scientific and Technical Information of China (English)

    WU Cai-ling; WANG Xi

    2015-01-01

    More and more researchers have now agreed upon the necessity of teaching grammar, but it still remains controversial as how to teach the forms, with the central consideration of not to harm the meaning-focused communicative teaching method. In this essay, one of the issues in grammar teaching will be discussed as how to present new grammar to learners, through evaluating and modifying a particular presentation activity in a grammar-teaching textbook.

  10. Communication and presentation skills

    OpenAIRE

    Lorencová, Ivana

    2014-01-01

    This bachelor thesis deals with individual factors of communication and basic presentations skills. The theoretical part specifies the basic elements of verbal and non-verbal communication and basic factors connected with preparation and realisation of a presentation. The practical part of the thesis comprises an analysis of impacts of speaker's visual and other communication influences over an audience. The results are applied to a Multimedia Display exhibition taking place during the bachel...

  11. Developing a paper presentation.

    Science.gov (United States)

    Pierce, L L; Gregg, M M

    1994-01-01

    The purpose of this article is to provide suggestions for developing and presenting papers at an educational conference or other professional meeting. The authors offer suggestions on how to write an abstract, deal with rejection or success, develop an outline, construct a lecture, select audiovisual materials, and use public-speaking skills. The practical strategies described in this article are intended to enable rehabilitation nurses and other readers to develop and/or enhance their paper presentations.

  12. Stellar Presentations (Abstract)

    Science.gov (United States)

    Young, D.

    2015-12-01

    (Abstract only) The AAVSO is in the process of expanding its education, outreach and speakers bureau program. powerpoint presentations prepared for specific target audiences such as AAVSO members, educators, students, the general public, and Science Olympiad teams, coaches, event supervisors, and state directors will be available online for members to use. The presentations range from specific and general content relating to stellar evolution and variable stars to specific activities for a workshop environment. A presentation—even with a general topic—that works for high school students will not work for educators, Science Olympiad teams, or the general public. Each audience is unique and requires a different approach. The current environment necessitates presentations that are captivating for a younger generation that is embedded in a highly visual and sound-bite world of social media, twitter and U-Tube, and mobile devices. For educators, presentations and workshops for themselves and their students must support the Next Generation Science Standards (NGSS), the Common Core Content Standards, and the Science Technology, Engineering and Mathematics (STEM) initiative. Current best practices for developing relevant and engaging powerpoint presentations to deliver information to a variety of targeted audiences will be presented along with several examples.

  13. The psychological present.

    Science.gov (United States)

    Hayes, L J

    1992-01-01

    The present paper compares behavior-analytic and cognitive treatments of the concept of psychological history with regard to its role in current action. Both treatments take the position that the past bears some responsibility for the present, and are thereby obligated to find a means of actualizing the past in the present. Both do so by arguing that the past is brought to bear in the present via the organism. Although the arguments of the two positions differ on this issue, neither provides a complete account. An unconventional treatment of psychological history is proposed, the logic of which is exemplified in anthropological, biological, and psychological perspectives. The unconventional treatment in psychological perspective holds that (a) the organism's interaction with its environment, not the organism itself, changes with experience; and (b) the past interactions of an organism exist as, and only as, the present interactions of that organism. This solution to the problem of psychological history provides obligations and opportunities for analysis that are not available when the more conventional positions of cognitivism and behavior analysis are adopted.

  14. TUBERCULOSIS PRESENTING AS EPIGLOTTITIS

    Directory of Open Access Journals (Sweden)

    FAHIM AHMED SHAH

    2015-03-01

    Full Text Available We report a rare case of laryngeal tuberculosis in Oman Tuberculous affection of larynx is un-common in Oman and is rarely been reported. Tuberculosis is a chronic illness, acute clinical presentation is unusual. We report the case of a thirty One year old lady, post renal transplant with tuberculous involvement of the larynx, who presented with symptoms and clinical signs of acute epiglottitis. ENT examination showed initially a severely swollen epiglottis which turned nodular in about two weeks. The patient had been on immunosuppressive medications and glucocorticoids post renal trans-plant. Tuberculosis still presents sporadically in countries where the overall incidence of tuber-culosis is much lower as compared to developing countries. A strong index of suspicion is needed in immunocompromised patients with suboptimal response to routine medications. Diagnostic difficulty in this peculiar situation with differential diagnosis and management of laryngeal tuberculosis is discussed along with review of literature.

  15. Study of a case of essential hypoproteinaemia using the isotopes {sup 131}I and {sup 15}N; Etude a l'aide des isotopes {sup 131}I et {sup 15}N d'un cas d'hypoproteinemie essentielle

    Energy Technology Data Exchange (ETDEWEB)

    Dubert, A.; Coursaget, J.; Fallot, P.; Royer, P. [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires; Hopital des Enfants Malades, 75 - Paris (France)

    1959-07-01

    Hypoproteinaemia both human and experimental has been studied with the help of nuclear labelling. A comparative study has been made of the fate of serum proteins labelled by an endogenous path after administration of nitrogen-15 glycine and also of serum albumin labelled by exogenous path using iodine-131. We have determined the biological period of the serum albumin and serum globulins and also the magnitude of the vascular and extravascular pools of serum albumin. In this way it has been possible to measure the speed of replacement of plasma proteins. A presentation of results taken from both clinical observation and experiment leads to a discussion on the pathogenic mechanism of hypoproteinaemia. (author) [French] Les hypoproteinemies humaine et experimentale ont ete explorees a l'aide d'indicateurs nucleaires. Une etude comparative du devenir des proteines seriques marquees par voie endogene, apres administration de glycocolle-{sup 15}N et de l'albumine serique marquee par voie exogene a l'iode-131 a ete realisee. On a determine la periode biologique de la serumalbumine et des globulines seriques ainsi que la grandeur des 'pools' vasculaire et extravasculaire de la serumalbumine. Il a ete ainsi possible d'evaluer la vitesse de renouvellement des proteines plasmatiques. La confrontation des resultats tires de l'observation clinique et de l'experimentation conduit a une discussion sur le mecanisme pathogenique de l'hypoproteinemie. (auteur)

  16. [Atypical presentation of preeclampsia].

    Science.gov (United States)

    Ditisheim, A; Boulvain, M; Irion, O; Pechère-Bertschi, A

    2015-09-09

    Preeclampsia is a pregnancy-related syndrome, which still represents one of the major causes of maternal-fetal mortality and morbidity. Diagnosis can be made difficult due to the complexity of the disorder and its wide spectrum of clinical manifestations. In order to provide an efficient diagnostic tool to the clinician, medical societies regularly rethink the definition criteria. However, there are still clinical presentations of preeclampsia that escape the frame of the definition. The present review will address atypical forms of preeclampsia, such as preeclampsia without proteinuria, normotensive preeclampsia, preeclampsia before 20 weeks of gestation and post-partum preeclampsia.

  17. Milk: Past and Present

    Science.gov (United States)

    Bulajić, S.; Đorđević, J.; Ledina, T.; Šarčević, D.; Baltić, M. Ž.

    2017-09-01

    Although milk/dairy consumption is part of many cultures and is recommended in most dietary guidelines around the world, its contribution to overall diet quality remains a matter of controversy, leading to a highly polarized debate within the scientific community, media and public sector. The present article, at first, describes the evolutionary roots of milk consumption, then reviews the milk-derived bioactive peptides as health-promoting components. The third part of the article, in general, presents the associations between milk nutrients, disease prevention, and health promotion.

  18. Book Presentation | 27 February

    CERN Multimedia

    The CERN Library

    2013-01-01

    "A caccia del bosone di Higgs. Magneti, governi, scienziati e particelle nell'impresa scientifica del secolo" by Luciano Maiani and Romeo Bassoli, published by Mondadori. On Wednesday 27 February Luciano Maiani will present the book "A caccia del bosone di Higgs. Magneti, governi, scienziati e particelle nell'impresa scientifica del secolo". More information here. The presentation will take place in the Council Chamber at 16.00 and will be followed by a debate and book signing. The book will be on sale. You are cordially invited.

  19. Effective lecture presentation skills.

    Science.gov (United States)

    Gelula, M H

    1997-02-01

    Lectures are the most popular form of teaching in medical education. As much as preparation and organization are key to the lecture's success, the actual presentation also depends upon the presenter's ability to reach the audience. Teaching is a lively activity. It calls for more than just offering ideas and data to an audience. It calls for direct contact with the audience, effective use of language, capability to use limited time effectively, and the ability to be entertaining. This article offers a structure to effective lecturing by highlighting the importance of voice clarity and speaking speed, approaches to using audiovisual aids, effectively using the audience to the lecture, and ways to be entertaining.

  20. Imagined futures, present lives

    DEFF Research Database (Denmark)

    Dalsgaard, Anne Line; Wildermuth, Norbert

    2006-01-01

    is discussed centrally in this attempt to contribute to an empirically grounded understanding of the role that media play for youth in their striving to ‘find a place in life'. In the empirical context presented in the article, imaginations, expanded and circulated by a globalized media circuit...

  1. Generating Embodied Information Presentations

    NARCIS (Netherlands)

    Theune, M.; Heylen, D.; Nijholt, A.; Stock, O.; Zancanaro, M.

    2005-01-01

    The output modalities available for information presentation by embodied, human-like agents include both language and various nonverbal cues such as pointing and gesturing. These human, nonverbal modalities can be used to emphasize, extend or even replace the language output produced by the agent. T

  2. Presentation design: pecha kucha

    OpenAIRE

    Aníbal, J.

    2011-01-01

    Global presentation phenomena has started in 2003. Pecha Kucha: change in attitude • wonderfully creative • unconventional way “to do PowerPoint". Design is about people creating solutions that help or improve the lives of other people. "Design is not an art although there is art in it", Garr Reynolds.

  3. Creating Meaningful Multimedia Presentations

    NARCIS (Netherlands)

    Hardman, L.; Ossenbruggen, J.R. van

    2006-01-01

    Finding relevant information is one step in the chain of understanding information. Presenting material to a user in a suitable way is a further step. Our research focuses on using semantic annotations of multimedia elements to increase the ”presentability” of retrieved info

  4. The Persistence of Presentism

    Science.gov (United States)

    Hargreaves, Andy; Shirley, Dennis

    2009-01-01

    Background/Context: This study draws on the voluminous research on teachers' workplace orientations and especially on Dan Lortie's documentation of conservatism, individualism, and presentism among teachers. Purpose/Objective/Research Question/Focus of Study: This study investigated a school reform network of over 300 secondary schools entitled…

  5. Presentation of 2004 earnings

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-03-01

    This presentation offers financial information on the AREVA Group earnings for the year 2004. With manufacturing facilities in over 40 countries and a sales network in over 100, Areva offers customers technological solutions for nuclear power generation and electricity transmission and distribution. The Group also provides interconnect systems to the telecommunications, computer and automotive markets. (A.L.B.)

  6. Neurosyphilis: Various Presentations

    Directory of Open Access Journals (Sweden)

    Kezban Aslan

    2012-12-01

    Full Text Available Neurosphylisis develops in about 5 % of untreated patients infected with Treponema pallidum. Spirocet, disseminates systemically hours to days after inoculation. Early invasion to central nervous system can be seen in infected patients without symptomatic. In these lecture we presented three patients with different complain. The patients have had; diplopia, headache and blurred vision, numness and slimming of legs.

  7. Presentation design: pecha kucha

    OpenAIRE

    Aníbal, J.

    2011-01-01

    Global presentation phenomena has started in 2003. Pecha Kucha: change in attitude • wonderfully creative • unconventional way “to do PowerPoint". Design is about people creating solutions that help or improve the lives of other people. "Design is not an art although there is art in it", Garr Reynolds.

  8. Presentism and black holes

    NARCIS (Netherlands)

    Sengers, G. (Geurt)

    2017-01-01

    textabstractIn a recent publication in the European Journal for Philosophy of Science (Romero and Pérez, European Journal for Philosophy of Science, 4, 293–308, 2014), Romero and Pérez claim to reveal new trouble for the already difficult life of presentism in relativistic spacetimes. Their argument

  9. Managing Presentation Anxiety

    Science.gov (United States)

    Hartman, Jackie L.; LeMay, Elaine

    2004-01-01

    All business communication professors struggle with anxiety-ridden students when discussing public speaking. To alleviate students' fears of speaking in public a process was designed to allow business communication students to acknowledge, address, and annul their presentation fears. A six-year comparative study using qualitative methods and…

  10. Econophysics: Past and present

    Science.gov (United States)

    de Area Leão Pereira, Eder Johnson; da Silva, Marcus Fernandes; Pereira, H. B. B.

    2017-05-01

    This paper provides a brief historical review of the relationship between economics and physics, beginning with Adam Smith being influenced by Isaac Newton's ideas up to the present day including the new econophysics discipline and some of the tools applied to the economy. Thus, this work is expected to motivate new researchers who are interested in this new discipline.

  11. Cystosarcoma phyllodess. Case presentation

    Directory of Open Access Journals (Sweden)

    Lidia Torres Ajá

    2006-08-01

    Full Text Available A 12 year-old patient is presented, with tumor of the left breast of 11,7 cms, of quick growth, without another accompanying sintomatology, which was diagnosed as cystosarcoma phyllodess benign. In the twenty-five years of existence of our hospital, it is the first tumor phyllodes detected in girl, for that is considered a curious and interesting case that can enrich the experience of other professionals of the health.

  12. Ground Vehicle Robotics Presentation

    Science.gov (United States)

    2012-08-14

    Mr. Jim Parker Associate Director Ground Vehicle Robotics Distribution Statement A. Approved for public release Report Documentation Page...Briefing 3. DATES COVERED 01-07-2012 to 01-08-2012 4. TITLE AND SUBTITLE Ground Vehicle Robotics Presentation 5a. CONTRACT NUMBER 5b. GRANT...ABSTRACT Provide Transition-Ready, Cost-Effective, and Innovative Robotics and Control System Solutions for Manned, Optionally-Manned, and Unmanned

  13. EPIDEMIOLOGY LENSES : A PRESENTATION

    Directory of Open Access Journals (Sweden)

    Prakash V. Kotecha

    2010-07-01

    Full Text Available The presentation started with his nostalgic memory with Professor NR Mehta, Professor DH Trivedi and Professor AK Niyogi with whom he had the opportunity to work as a student and then as a colleague. He refreshed his memory as warden of Dr. Jivraj Mehta Hall where his predecessors were Prof NR Mehta and Professor DH Trivedi and he remembered to be the first time examiner with Prof. Niyogi who was examiner with him for the last time in his career .....

  14. Scleroderma. A case presentation.

    Directory of Open Access Journals (Sweden)

    Rubén Bembibre Taboada

    2005-08-01

    Full Text Available This article presents a brief review about generalized sclerosis (sclerodermia and reports a case with such disease talking into consideration that the patient received clinical intensive care assistaance and had a clinical diagnosis supoported by lab test for a clinical and differential diagnosis. Medical treatment was applied for the disease and for the possible complications, but the patients follow up was wrong due to multi organ failure as a consequence of derlying disease.

  15. Presentation = Speech + Slides

    Directory of Open Access Journals (Sweden)

    Derik Badman

    2008-12-01

    Full Text Available Back in October, Aaron Schmidt posted “HOWTO give a good presentation” to his blog walking paper. His second bullet point of “thoughts” on good presentations is: Please don’t fill your slides with words. Find some relevant and pretty pictures to support what you’re saying. You can use the pictures to remind yourself what you’re going [...

  16. Neurosyphilis presenting as parkinsonism.

    Science.gov (United States)

    McAuley, John; Hughes, Gaenor

    2015-09-28

    In the postantibiotic era, neurosyphilis continues to have a significant incidence, especially in certain subpopulations. We report, for the first time, neurosyphilis presenting as parkinsonism without more typical neurosyphilitic clinical features. A 53-year-old man developed clinical features of gradual onset consistent with idiopathic Parkinson's disease but was found to have positive treponemal serology and cerebrospinal fluid Venereal Disease Research Laboratory (VRDL) reaction. Antibiotic treatment dramatically improved all the parkinsonian symptoms. However, over the subsequent 15 years, the patient slowly deteriorated again in a manner typical of idiopathic Parkinson's disease. A dopaminergic deficit was demonstrated on ((123)I)FP-CIT SPECT. This is the first report in the postantibiotic era of neurosyphilis presenting as relatively pure parkinsonism. Blood test screening for syphilis is therefore appropriate if there is any clinical doubt about an idiopathic parkinsonian presentation. The patient's late second deterioration may suggest that the neurosyphilitic basal ganglial insult primed or accelerated development of idiopathic-like disease. 2015 BMJ Publishing Group Ltd.

  17. Tuberous Sclerosis: Multiple Presentations

    Directory of Open Access Journals (Sweden)

    M. Sanei Taheri

    2008-01-01

    Full Text Available Introduction: Tuberous sclerosis is an autosomal do-minant genetic disorder that involves multiple or-gans. The predominant lesions are the hamartomas. Classically tuberous sclerosis has been characterized by a classic clinical triad of facial angiofibromas in 90%,retardation in 50-80%,seizure 80-90% and all three in 30%."nThe disease occurs in 1:100,000 persons in all races with nearly equal distribution between the sexes. "nCase Presentation: We had six patients who admitted with different presentations of tuberous sclerosis with a past history of convulsion from childhood, skin le-sions and mental retardation, also with new onset headache and changed pattern of convulsion. In physical examination facial angiofibromas and sub-ungual fibromas apparently detected. Brain CT scan study with contrast showed multiple calcified nod-ules associated with tubers and ventriculomegaly, also an enhancing enlarged nodule at foramen of mo-nro, which was suggestive of subependymal giant cell astrocytoma (SGCA. In abdominal and pelvic CT scan and ultrasonography, massive bilateral angio-myolipomatosis diagnosed. Also Focal hypodense le-sions in liver which were hyperechoic in ultrasono-graphy were diagnosed. With MRI study tubers, white matter lesions and subependymal nodules asso-ciated with SGCA were detected better. After surgery SGCA was proved."nDiscussion: Our patients had different presentations and various findings of this spectrum discussed in this lecture.

  18. L’huile d’olive d’Ollioules à Versailles Ollioules olive oil at Versailles. Perception and promotion of the Provençaux at court in the late seventeenth century

    Directory of Open Access Journals (Sweden)

    Frédéric d’Agay

    2008-06-01

    Full Text Available Après un exposé de la façon dont sont considérés les Provençaux sous l’Ancien Régime par les gens de cour et leurs contemporains, sont présentées les familles provençales fixées à la Cour à la fin du xviie siècle, au moment de son installation à Versailles. À commencer par les familles de toute éternité à la Cour, les Villeneuve, Simiane, Vintimille, Castellane-Grignan, puis les grandes réussites du xviie siècle comme les Brancas ou les Luynes, et celles qui deviennent des références sous Louis XIV, tels les Forbin. Exemple de cette volonté de se hisser qu’ont les familles provençales, les Boyer-Bandol, riches marchands d’Ollioules au xvie siècle, agrégés à la noblesse au début du règne de Louis XIII, passés au parlement d’Aix, sont devenus en un peu plus d’un demi-siècle des « gens de qualité » par leur fortune et leurs emplois, ce qui confirme la prise de pouvoir de la noblesse parlementaire aixoise. Fille de Maurel de Pontevès, le Crésus de la Provence, la présidente de Bandol vient à Paris en 1687 pour y placer ses fils au collège Louis-le-Grand et les faire élever par un précepteur avec qui elle entretient une nombreuse correspondance. Le puîné, le chevalier de Bandol, est reçu page de la Dauphine, l’aîné reprend le mortier familial et les cadets sont d’épée. Cette correspondance énumère les phases et les moyens de l’ascension sociale, ainsi que les échanges qui y contribuent. On trouve en annexe les listes des produits et cadeaux envoyés à Paris et à Versailles, les achats parisiens et le rôle des hardes du jeune page et de sa bibliothèque.An exposé on the manner in which the Provencaux (people of Provence were regarded by the people of the court and their peers under the Ancien Régime, is followed by a presentation of the Provençal families at court in the late seventeenth century, when the latter moved to Versailles. Starting with the families who had

  19. Xeroderma pigmentosum. Case presentation.

    Directory of Open Access Journals (Sweden)

    Damaris Díaz Leonard

    2008-08-01

    Full Text Available Twelve years old patient (YGS, female, white, of rural origin; with history of facial and truncal bullae since the age of eight months when exposed to the sun light. It was first diagnosed as solar dermatitis. At the age of 6 it was assessed as xeroderma pigmentosum. This diagnosis was confirmed at the age of 10 by the histopathology department and reassessed by the National Reference Centre. For the infrequency of this disease, a bibliographic revision was carried out to make a report for this case presentation.

  20. Toxocariasis Presenting as Encephalomyelitis

    Directory of Open Access Journals (Sweden)

    Gregory Helsen

    2011-01-01

    Full Text Available We describe a farmer who presented with a clinical picture of a transverse thoracic myelitis. MRI showed inflammatory lesions in brain and thoracic spinal cord. Toxocariasis was suspected because of eosinophilia in blood and cerebrospinal fluid, and this diagnosis was confirmed immunologically. He was successfully treated with antihelminthics in combination with corticosteroids. Neurotoxocariasis is rare and diagnosis can be difficult because of the different and atypical clinical manifestations. It should be considered in every case of central neurological syndrome associated with eosinophilia.

  1. Exit Presentation -- Maintaining Balance

    Science.gov (United States)

    Heap, Erin

    2010-01-01

    This slide presentation reviews the projects which the author engaged in during an internship at Johnson Space Center. Project 1 was involved with Stochastic Resonance (SR). Stochastic resonance is a phenomenon in which the response of a non-linear system to a weak input signal is optimized by the presence of a particular non-zero level of noise. The goal of this project was to develop a countermeasure for sensorimotor disturbances that are experienced after long duration space flight. The second project was a pilot study that was to examine how adaptation to a novel functional task was affected by postural disturbance.

  2. Sarcoidosis Presenting Addison's Disease.

    Science.gov (United States)

    Takahashi, Kentaro; Kagami, Shin-Ichiro; Kawashima, Hirotoshi; Kashiwakuma, Daisuke; Suzuki, Yoshio; Iwamoto, Itsuo

    2016-01-01

    We herein describe a second Japanese case of sarcoidosis presenting Addison's disease. A 52-year-old man was diagnosed with sarcoidosis based on clinical and laboratory findings, including bilateral hilar lymphadenopathy and elevated levels of serum angiotensin-converting enzyme and lysozyme, as well as the presence of noncaseating epithelioid granulomas. The patient also exhibited general fatigue, pigmentation, weight loss, hypotension and hyponatremia, suggestive of chronic adrenocortical insufficiency. An endocrine examination confirmed primary adrenocortical insufficiency. This case suggests the direct involvement of sarcoid granuloma in the adrenal glands.

  3. Presenting Newtonian gravitation

    Energy Technology Data Exchange (ETDEWEB)

    Counihan, Martin [School of Physics and Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ (United Kingdom)

    2007-11-15

    The basic principles of the Newtonian theory of gravitation are presented in a way which students may find more logically coherent, mathematically accessible and physically interesting than other approaches. After giving relatively simple derivations of the circular hodograph and the elliptical orbit from the inverse-square law, the concept of gravitational energy is developed from vector calculus. It is argued that the energy density of a gravitational field may reasonably be regarded as -g{sup 2}/8{pi}G, and that the inverse-square law may be replaced by a Schwarzschild-like force law without the need to invoke non-Euclidean geometry.

  4. Analyzing in the present

    DEFF Research Database (Denmark)

    Revsbæk, Line; Tanggaard, Lene

    2015-01-01

    The article presents a notion of “analyzing in the present” as a source of inspiration in analyzing qualitative research materials. The term emerged from extensive listening to interview recordings during everyday commuting to university campus. Paying attention to the way different parts...... the interdependency between researcher and researched. On this basis, we advocate an explicit “open-state-of mind” listening as a key aspect of analyzing qualitative material, often described only as a matter of reading transcribed empirical materials, reading theory, and writing. The article contributes...

  5. Bad (Re)Presentations

    CERN Multimedia

    Computer Security Team

    2013-01-01

    This time, we would like to address copyright violations (again) - but with a twist. While previous articles focussed on “Music, videos and the risk for CERN” or on software licences, the focus is now on using photos, music and images “found” on the Web for presentations, publications and web pages…   Just recently, a video produced for CERN and published on YouTube and Facebook used background music from a contemporary popular artist. However, the people responsible failed to obtain the appropriate permission to actually use that music. They thought that having bought it on iTunes was sufficient. But it was not: “buying” means you have the right to listen, but not the right for further distribution or re-publication. As a result, the videos were pulled from YouTube and Facebook. Similarly, how many of us integrate graphics and images “found” on the Web into our presentations?  How many of us...

  6. Summaries of Presentations

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    This two-day conference on the ecology of the Columbia River Reservoirs was organized by the Columbia Mountains Institute of Applied Ecology. Presentations focused on key differences between the former natural river system and the current system of reservoirs now comprising much of the Columbia River. The first day of the workshop consisted of presentations at the Revelstoke Community Centre. The second day included a choice of field trips to the Columbia River Flats to hear about BC Hydro's revegetation program and the bird migration monitoring station; a tour of the revegetation work at the Illeciwaet Greenbelt; a tour of the Revelstoke Dam; or a canoe trip. The workshop was financially supported by Fisheries Renewal BC, through the Columbia-Kootenay Fisheries Renewal Partnership. The list of papers presented were: (1) The value of the Columbia River to the First Nations' by Wilfred Jacob of the Ktunaxa-Kinbasket Tribal Council, (2) 'Big River Ecology' by Jack Stanford of the University of Montana, (3) 'Sinixt Nation perspective on the Columbia River' by Marilyn James of the Sinixt Nation, (4) 'Cottonwood floodplain ecology - Current status and restoration options' by Bob Jamieson of BioQuest International Consulting Ltd., (5) 'Wildlife and reservoirs in the Kootenay Region' by Ray Dichromium of Ecodomain Consulting, (6) 'Operational Regime of the Columbia River - How much flexibility is there to manage biological resources?' by Ralph Legge of BC Hydro, (7) 'Biological implications of the current operational regime - Management options' by Gary Birch of BC Hydro, (8) 'Challenge of managing fisheries in the Columbia River' by Jay Hammond of the BC Ministry of Environment, (9) 'Ecology and genetics of wild fish and their interaction with hatcheries' by Mart Gross of the University of Toronto, (10) 'Fertilization as a mitigation option for nutrient depletion' by Ken

  7. Film Presentation: Die Urknallmaschine

    CERN Multimedia

    Carolyn Lee

    2010-01-01

    Die Urknallmaschine, an Austrian film by Gerd Baldauf, narrated by Norbert Frischauf (Alpha Österreich - ORF, 2009).  In CERN’s gigantic complex particles are accelerated to almost the speed of light, brought to collision and made to divide into even smaller particles. Public opinion of CERN’s research is also divided. Sceptics fear that black holes may be created. Might the goal to study the origin of the world lead to its destruction? The Austrian researcher Norbert Frischauf worked at CERN for many years. With his guidance it is possible to explore the world’s largest research centre, get a glimpse of the fascinating work the scientists do there and take a crash course in particle physics. Die Urknallmaschine will be presented on Friday, 25 June from 13:00 to 14:00 in the Main Auditorium. Language: German

  8. Presenting practice financial information.

    Science.gov (United States)

    Webster, Lee Ann H

    2007-01-01

    Medical practice leadership teams, often consisting primarily of physicians with limited financial backgrounds, must make important business decisions and continuously monitor practice operations. In order to competently perform this duty, they need financial reports that are relevant and easy to understand. This article explores financial reporting and decision-making in a physician practice. It discusses reports and tools, such as ratios, graphs, and comparisons, that practices typically include in their reports. Because profitability and cash flow are often the most important financial considerations for physician practices, reports should generally focus on the impact of various activities and potential decisions upon these concerns. This article also provides communication tips for both those presenting practice financial information and those making the decisions. By communicating effectively, these leaders can best use financial information to improve decision-making and maximize financial performance.

  9. RESRAD model presentation

    Energy Technology Data Exchange (ETDEWEB)

    Yu, C.; Faillace, E.; Chen, S.Y. [Argonne National Lab., IL (United States); Wallo, A. III; Williams, W.A.; Peterson, H.; Domotor, S. [Dept. of Energy, Washington, DC (United States)

    1998-05-01

    RESRAD was one of the multimedia models selected by the US Nuclear Regulatory Commission (NRC) to include in its workshop on radiation dose modeling and demonstration of compliance with the radiological criteria for license termination. This paper is a summary of the presentation made at the workshop and focuses on the 10 questions the NRC distributed to all participants prior to the workshop. The code selection criteria, which were solicited by the NRC, for demonstrating compliance with the license termination rule are also included. Among the RESRAD family of codes, RESRAD and RESRAD-BUILD are designed for evaluating radiological contamination in soils and in buildings. Many documents have been published to support the use of these codes. This paper focuses on these two codes. The pathways considered, the databases and parameters used, quality control and quality assurance, benchmarking, verification and validation of these codes, and capabilities as well as limitations of these codes are discussed in detail.

  10. Parathyroid adenoma. Case presentation

    Directory of Open Access Journals (Sweden)

    Daniel Olivera Fajardo

    2016-10-01

    Full Text Available Parathyroid Adenoma is a non-malignant tumor of the thyroid glands, which increases the levels of parathormone. This hormone regulates blood and bone levels of calcium, phosphorus and Vitamin D. Its classic triad is characterized by the increase of the levels of parathormone, hyperkalimia and Hipophosphatemia. This entity affects between 500-1000 inhabitants and is the main cause of primary Hyperparathyroidism in about 80-85% of the patients. It is presented a case of a 69 year old female patient, admitted due to pathologic fractures of hip, clavicle, and fingers, caused by primary hyperparathyroidism originated by parathyroid adenoma. For the low incidence of this entity, its publication is considered of interest for the scientific staff.

  11. Tuberous sclerosis. Case presentation.

    Directory of Open Access Journals (Sweden)

    Graciela Caridad Cabrera Acea

    2009-03-01

    Full Text Available A mixed race female, 34 years of age was attended due to papule lesions in the facial area between one and ten mm of diameter. These lesions were flat, with skin colour, symmetrically distributed in the central part of the face (cheeks, chin and nose, of soft texture with telangiectasia. She referred to present these lesions since she was seven years of age, and three months before attending to consultation she noticed an increase in the number and size of these lesions. The patient has a normal intelligence coefficient and declared family history of these lesions. The diagnosis was sebaceous adenoma. Since this is not a frequent disease and due to the patient’s age we decided to publish this case.

  12. Huile d’olive et santé osseuse

    OpenAIRE

    Coxam Véronique; Wauquier Fabien; Darie Cédric; Spilmont Mélanie; Davicco Marie-Jeanne; Wittrant Yohann

    2014-01-01

    L’ostéoporose représente un problème majeur de santé. La prise en charge classique de cette pathologie, essentiellement curative, est destinée aux personnes qui ont exprimé la maladie. Une telle stratégie ciblant la personne âgée souffrant d’ostéoporose sévère s’avère trop tardive. En fait, le traitement idéal de l’ostéoporose, pour être efficace, doit être oral, dénué d’effet secondaire, et surtout précoce de façon à inhiber très en ...

  13. Friture profonde : les interactions huile-produit

    Directory of Open Access Journals (Sweden)

    Courtois Francis

    2012-03-01

    Full Text Available Among the many thermal processes used to prepare tasty food, deep fat frying is one of the fastest and cheapest. Oil serves both as an ingredient and as a heating medium. Recently, nutrition became amajor health issue especially in developed countries where obesity is widespread. Fried products being often considered as too calorific, many research projects try to understand the underlying mechanisms of oil uptake in the fried product. There is a difficult challenge in reducing fat content without altering texture and taste. This papers aims at reviewing most interesting researches published on oil uptake.

  14. COMPETITIVITE DE LA FILIERE HUILE D'OLIVE EN ALGERIE ...

    African Journals Online (AJOL)

    fondée sur le calcul des coûts de production dans les exploitations ag- ricoles de la wilaya de ... L'Algérie ne dispose pas d'un avantage comparatif sur les prix ; mais ...... volume, ce circuit demeure marginal face aux modes de commer-.

  15. Holographie en infrarouge sur de minces couches d'huile.

    Science.gov (United States)

    Cormier, M; Blanchard, M; Rioux, M; Beaulieu, R

    1978-11-15

    Oil films of approximately 1-microm thickness on glass plates are used as a holographic recording medium at a 10.6-microm wavelength. This dynamic recording medium (on which the recording is not permanent) shows diffraction efficiencies up to 20% when reconstructing at 632.8 nm, the spatial frequency at the recording being as high as ~50 cycles/mm. Furthermore, the response time of these oil films when recording ir can be as small as 2 msec so that ir holography of moving objects is possible in real time.

  16. Leader mode d'emploi 10 compétences essentielles pour communiquer, collaborer et innover

    CERN Document Server

    Paquet, René

    2013-01-01

    Communiquer efficacement, favoriser la collaboration, stimuler la créativité et résoudre les conflits dans un climat de coopération, voilà les aptitudes qui caractérisent le leader qui dirige avec brio. Que vous soyez à la barre d'une équipe de cinq ou de trente personnes, vous trouverez dans cet ouvrage tous les outils pour entretenir la motivation de vos employés, susciter les bonnes réactions, éviter les faux pas, maximiser votre productivité et ainsi devenir un meneur de premier ordre. Quelques conseils à appliquer : Prendre le temps de créer une relation avec chacun de mes collaborateurs. Apprendre les règles, les normes et les valeurs de l'organisation. Favoriser le développement des compétences et l'acquisition des connaissances. Établir des canaux de communication. Exprimer des attentes claires. Quelques erreurs à éviter Faire de la micro-gestion : tenter de tout contrôler. Travailler en vase clos. Remettre à plus tard les tâches moins agréables. Rester dans ma zone de confort ...

  17. L'hypertension artérielle essentielle peut-elle être prevenue?

    OpenAIRE

    Krzesinski, Jean-Marie; Saint-Remy, Annie

    2003-01-01

    Prevalence of arterial hypertension is growing, in particular due to population ageing. Hypertension is a major risk factor for cardiovascular morbidity and mortality. Prevention is conceivable on a theoretical basis by reduction or, if possible, prevention of excess weight, diet modifications, increased physical activity among other means. To be efficient, prevention should include an early detection of patients at risk and a long term assessment of efficacy requiring many efforts from both ...

  18. Le leadership en santé et la philosophie appliquée : une ressource essentielle.

    Science.gov (United States)

    Fistein, Elizabeth; Malloy, David Cruise

    2017-07-01

    En qualité de professionnels de la santé, nous sommes déterminés à assurer l'exploitation efficiente et efficace de nos établissements. Les outils dont nous disposons sont les structures bureaucratiques, les règles, les règlements, les politiques et, bien sûr, les mesures. Il n'y a rien de foncièrement pernicieux à avoir des établissements efficients, efficaces et mesurés, mais nous soutenons que l'humanité et l'authenticité manquent cruellement dans cet environnement, au prix d'un travail significatif. Les solutions que nous proposons appartiennent au milieu de la philosophie, et particulièrement au secteur qui repose sur des principes fondamentaux : qu'est-ce qu'une infirmière, qu'est-ce qu'un patient, qu'est-ce qu'un hôpital?

  19. Presentation of Pydio

    CERN Document Server

    CERN. Geneva

    2014-01-01

    **Pydio is an open-source platform for file sharing and synchronisation.** It is wildly used by enterprises and organizations worldwide, including major universities. Pydio comes with a rich web-based interface, native clients for both iOS and Android mobile devices, and lately a new sync client for desktop platforms. Pydio v6 is of great useability and introduces many new features that makes it the ultimate sharing machine. Its architecture makes it a perfect fit for either easily deploying an on-premise dropbox solution, or building more complicated solutions where the box feature is integrated as OEM. Storage-agnostic, Pydio is a simple layer that can be deployed on top of any storage backend, thus providing scalability and high-availability out-of-the-box. Charles du Jeu is the lead developer of the solution and will briefly present its feature and how it can fit for research and engineering purpose. See https://pyd.io/ for more information.

  20. Sarcoidosis: An unusual presentation.

    Science.gov (United States)

    Madureira, Pedro; Pimenta, Sofia; Cardoso, Hélder; Guimarães Cunha, Rui; Costa, Lúcia

    A 35-year-old man presented with a 3-year history of arthralgia and purple coloration of the skin of his fingers and feet. Hand and foot radiography showed cystic bone lesions on phalanges suggestive of sarcoidosis. Lab tests revealed increased liver enzymes. Liver MRI evidenced an enlarged liver and retroperitoneal lymphadenopathy. Histological analysis of the finger skin, lymph nodes and liver demonstrated the presence of granulomas, confirming the diagnosis of sarcoidosis. The patient started prednisolone with rapid improvement of the symptoms. Skin lesions are divided into two groups: specific for sarcoidosis (with granulomas, lupus pernio-like) and nonspecific (without granulomas, erythema nodosum-like). Specific cutaneous lesions usually cause no other symptoms beyond cosmetic changes. Lupus pernio stands out for having distinctive features but, to the best of our knowledge, the simultaneous involvement of both hands and feet has never been reported. Copyright © 2016 Elsevier España, S.L.U. and Sociedad Española de Reumatología y Colegio Mexicano de Reumatología. All rights reserved.

  1. TACE Case Presentations

    Directory of Open Access Journals (Sweden)

    Mahyar Mohammadifard

    2010-05-01

    Full Text Available Gold standard treatment of hepatocellular carci-noma is surgical resection but more than 80% of patients with HCC are unresectable at the time of diagnosis, and due to poor local circumstances or the patient's general condition, the prognosis is poor. "nBecause HCC tumors are fed exclusively by the he-patic artery, successful TACE leads to tumor necrosis. The liver parenchyma is rarely damaged because it is fed by the portal vein. Injection of an emulsion of iodized oil and cytostatic agents into the hepatic artery leads to selective deposition of the emulsion in the tumor. Compared with intravenous administration of cytostatic material, TACE reduces the maximum plasma concentration and increases the average concentration of cytostatic agents in the tumor, especially when the cytostatic material is combined with gelatin powder particles. "nFor example, concentration of an emulsion of cisplatin in iodized oil 4-9 weeks after intraarterial administration is 42 times greater in the tumor than in the parenchyma."nTwo cases of HCC are presented which were treated successfully with TACE 20 months ago."nIn the first patient after one session of TACE, tumor markers fell down into normal range and MDCT showed complete necrosis and cystic changes in the mass without residual or recurrent tumor until this time. "nIn the next case tumor markers showed no significant decrease after the first session of TACE and MDCT showed residual tumor which was fed by an accessory arterial branch from SMA. This branch was treated in another session. Two months later, tumor markers fell down and MDCT showed no tumor activity. "nThese patients have been symptom free after the mentioned interventions.

  2. THE UPSIDE OF PRESENTISM

    Directory of Open Access Journals (Sweden)

    Lynn Fendler

    2009-01-01

    Full Text Available El presentismo es visto generalmente como un mal necesario en historiografía. Este artículo explora lo positivo de esta inevitabilidad. Aplicando un enfoque filosófico al análisis discursivo en la tradición de la nueva historia cultural, se distingue -de una parte-¿ entre un uso estratégico del presentismo, y -de otra- un enfoque racionalista en historia. El artículo concluye considerando algunas implicaciones políticas en historiografía de las explicaciones racionalistas y de las explicaciones estratégicamente presentistas. Los modos de comprensión racionalistas inscriben las expectativas del pasado en las visiones del futuro; asignando al historiador el papel de profeta; y perpetuando nociones de agentes ahistóricos. En contraste, las historias estratégicamente presentistas incorporan una orientación que deliberadamente emplea las lentes y perspectivas del presente en orden a tener en cuenta supuestos y perspectivas actuales. Cuando las asunciones son examinadas en relación a las perspectivas presentistas, dichos presupuestos sueltan su rienda en el pensamiento. Dado que el presentismo es inevitable, no debe ser desestimado por completo, sino que debe ser una cuestión sondeada y examinada críticamente. Con dicho foco, el presentismo estratégico en la historiografía debe posibilitar una reflexión sobre los límites de lo que es posible pensar.

  3. Texts of presentation

    Energy Technology Data Exchange (ETDEWEB)

    Magnin, G.; Vidolov, K.; Dufour-Fallot, B.; Dewarrat, Th.; Rose, T.; Favatier, A.; Gazeley, D.; Pujol, T.; Worner, D.; Van de Wel, E.; Revaz, J.M.; Clerfayt, G.; Creedy, A.; Moisan, F.; Geissler, M.; Isbell, P.; Macaluso, M.; Litzka, V.; Gillis, W.; Jarvis, I.; Gorg, M.; Bebie, B.

    2004-07-01

    Implementing a sustainable local energy policy involves a long term reflection on the general interest, energy efficiency, distributed generation and environmental protection. Providing services on a market involves looking for activities that are profitable, if possible in the 'short-term'. The aim of this conference is to analyse the possibility of reconciling these apparently contradictory requirements and how this can be achieved. This conference brings together the best specialists from European municipalities as well as important partners for local authorities (energy agencies, service companies, institutions, etc.) in order to discuss the public-private partnerships concerning the various functions that municipalities may perform in the energy field as consumers and customers, planners and organizers of urban space and rousers as regards inhabitants and economic players of their areas. This document contains the summaries of the following presentations: 1 - Performance contracting: Bulgarian municipalities use private capital for energy efficiency improvement (K. VIDOLOV, Varna (BG)), Contracting experiences in Swiss municipalities: consistent energy policy thanks to the Energy-city label (B. DUFOUR-FALLOT and T. DEWARRAT (CH)), Experience of contracting in the domestic sector (T. ROSE (GB)); 2 - Public procurement: Multicolor electricity (A. FAVATIER (CH)), Tendering for new green electricity capacity (D. GAZELEY (GB)), The Barcelona solar thermal ordinance (T. PUJOL (ES)); 3 - Urban planning and schemes: Influencing energy issues through urban planning (D. WOERNER (DE)), Tendering for the supply of energy infrastructure (E. VAN DE WEL (NL)), Concessions and public utility warranty (J.M. REVAZ (CH)); 4 - Certificate schemes: the market of green certificates in Wallonia region in a liberalized power market (G. CLERFAYT (BE)), The Carbon Neutral{sup R} project: a voluntary certification scheme with opportunity for implementation in other European

  4. Crystallography: past and present

    Science.gov (United States)

    Hodeau, J.-L.; Guinebretiere, R.

    2007-12-01

    structure (chemical order, anisotropy, charge transfer, magnetic order) versus an external parameter like temperature, pressure, magnetic or electric field. Modern crystallography is also extended to the study of very small crystals, powders, ill-ordered or non-crystallized materials. Thus presently, crystallography is concerned with any solid that “scatters” an incident beam. Nevertheless, as quoted by A. Guinier, “the problems facing crystallographers have only changed, ... new ones have appeared which require reflection and imagination, ... and which in turn may still bring much joy to all those who like crystallography” [4]. Such developments open up crystallography to modern materials like artificial ones and nanostructures with low- and/or multi-scaled-periodicities and/or extremely small “crystal size” and to materials of the “real world”, with mixtures of phases and/or amorphous contribution and/or defects, a common characteristic of ancient materials analysed in patrimonial research. In our contribution we will show by selected examples that these improvements were allowed (i) by the use of powerful sources, apparatus and detectors which allow micro-diffraction, in-situ diffraction, spectroscopy, resonant scattering, inelastic scattering, coherent scattering, (ii) by the development of methods like diffraction anomalous fine structure (DAFS), pair distribution function (PDF), simulated annealing, single object reconstruction, (iii) by combination of scattering and spectroscopy and by combination of scattering and microscopy. Such combination of different approaches is very efficient and, as said by H. Curien at the IUCr Bordeaux Congress in 1990, “in crystallography, there is a constant alternation between the crystal space and its associated reciprocal space, ... the alternation between experiment and model building is another feature of crystallography activity ..., the crystallographer relies both on his computer and on his diffractometer

  5. Définition des limites de flexibilité des apports en acides oléique, linoléique et alphalinolénique sur la lipidémie et les paramètres d’athérothrombose chez l’homme : intérêt des huiles végétales combinées

    Directory of Open Access Journals (Sweden)

    Delplanque Bernadette

    2002-07-01

    Full Text Available Les maladies cardiovasculaires représentent le premier problème de santé publique des pays occidentaux. Des études récentes de prévention secondaire ont montré que des régimes maintenant un apport en acide oléique de 10 à 13% de l’apport énergétique total (AET pouvaient protéger de l’apparition d’accidents cardio-vasculaires [8], mais augmenter cet apport d’acide oléique à plus de 20% de l’AET pourrait limiter cet effet bénéfique en induisant une augmentation du LDL-C [12, 34]. Grundy, dans le but de clarifier le ratio nécessaire entre acides gras saturés et insaturés (mono and poly, concluait en 1997 à d’« insufficient data for recommended Oleic intake », et proposait pour le moment 15-16% d’acide oléique à titre de « reasonable compromise ». L’objectif de notre étude était de définir des rapports entre acides oléique, linoléique et alphalinolénique (OL/LA/ALA ratio et de valider l’apport oléique après avoir stabilisé le rapport linoléique/alphalinolénique du régime d’hommes normolipidémiques (n = 40. Pour atteindre 11, 13 et 16% de l’AET sous forme d’acide oléique, nous avons utilisé des huiles de tournesol, de tournesol oléique (HOSO et de colza pour obtenir des mélanges spécifiques ajustés à l’apport en acides gras proposés au protocole. Chacun de ces trois régimes (comportant 11, 13 et 16% d’acide oléique a été suivi pendant 16 semaines et l’épuration postprandiale d’un repas gras (1 000 Kcal, 62,5% lipides a été suivie pendant 8 heures à la fin de chaque période de régime. Les résultats indiquent que la stabilité des paramètres d’athérogenèse évalués à jeun et en postprandial est maintenue à un niveau favorable après ces régimes à 11, 13 et 16% d’apport en acide oléique : il n’y a pas de différences statistiques significatives sur les concentrations à jeun de LDL-C, non-HDL-C, HDL-C, TG, ApoB, ApoAI ou sur l’amplitude de la r

  6. present

    African Journals Online (AJOL)

    convention declared that English and Chichewa be the official languages of .... Malawi's Centre for Language Studies (CLS), to articles in scholarly journals. ..... formulation and implementation, and also to explain on the feasibility of the.

  7. Mathematical Reasoning in Teachers' Presentations

    Science.gov (United States)

    Bergqvist, Tomas; Lithner, Johan

    2012-01-01

    This paper presents a study of the opportunities presented to students that allow them to learn different types of mathematical reasoning during teachers' ordinary task solving presentations. The characteristics of algorithmic and creative reasoning that are seen in the presentations are analyzed. We find that most task solutions are based on…

  8. Mathematical Reasoning in Teachers' Presentations

    Science.gov (United States)

    Bergqvist, Tomas; Lithner, Johan

    2012-01-01

    This paper presents a study of the opportunities presented to students that allow them to learn different types of mathematical reasoning during teachers' ordinary task solving presentations. The characteristics of algorithmic and creative reasoning that are seen in the presentations are analyzed. We find that most task solutions are based on…

  9. METHODS FOR PERFECTING PRESENTATION SKILLS

    OpenAIRE

    Daniela N. Ilieva - Koleva

    2014-01-01

    Presentation skills are crucial for the nowadays managers and business people. This article aims to examine different traditional and unconventional methods for enhancing and perfecting presentation skills. It provides suggestions on how to structure a presentation, what type of verbal language to include, and pays significant attention to body language during presentations, as well as to the relation between the presenter and the audience. The paper highlights a variety of instruments and te...

  10. Put Power into Your Presentations: Using Presentation Software Effectively

    Science.gov (United States)

    Safransky, Robert J.; Burmeister, Marsha L.

    2009-01-01

    Microsoft PowerPoint, Apple Keynote, and OpenOffice Impress are relatively common tools in the classroom and in the boardroom these days. What makes presentation software so popular? As the Chinese proverb declares, a picture is worth a thousand words. People like visual presentations. Presentation software can make even a dull subject come to…

  11. Integral Presentations of Catalan Numbers

    Science.gov (United States)

    Dana-Picard, Thierry

    2010-01-01

    We compute in three different ways the same definite parametric integral. By-products are the derivation of a combinatorial identity and two integral presentations of Catalan numbers. One of them leads to a presentation using the [gamma] function.

  12. Integral Presentations of Catalan Numbers

    Science.gov (United States)

    Dana-Picard, Thierry

    2010-01-01

    We compute in three different ways the same definite parametric integral. By-products are the derivation of a combinatorial identity and two integral presentations of Catalan numbers. One of them leads to a presentation using the [gamma] function.

  13. Langerhans cell histiocytosis presenting as hypothyroid goitre: a unique presentation.

    Science.gov (United States)

    Marupudi, Krishna Chaitanya; Karanth, Suman S; Thomas, Joseph

    2014-12-02

    Langerhans cell histiocytosis (LCH) is a disease involving the antigen presenting cells, which can range from a single system involvement with an indolent course to a multisystem disease with increased morbidity. We present a rare case of LCH presenting as hypothyroid goitre that was successfully treated as per the LCH III trial protocol with a combination of vinblastine and oral prednisolone. We highlight the need for awareness of this rare presentation of LCH as a painless goitre which is often misdiagnosed as poorly differentiated thyroid carcinoma or overlooked as a benign disease.

  14. Dressed to Present: Ratings of Classroom Presentations Vary with Attire

    Science.gov (United States)

    Gurung, Regan A. R.; Kempen, Laura; Klemm, Kayla; Senn, Rebecca; Wysocki, Rosie

    2014-01-01

    This study investigates the effects of formality of dress on ratings of classroom presentations. Participants (N = 65, 66% women) from a Midwestern university in the United States rated three female students giving a presentation designed for a health psychology class in one of four outfits: casual, party, business casual, or business formal.…

  15. Isolated Torticollis May Present as an Atypical Presentation of Meningitis

    Directory of Open Access Journals (Sweden)

    Roger Chirurgi

    2012-01-01

    Full Text Available Background. Bacterial meningitis is a life-threatening medical emergency that requires urgent diagnosis and treatment. Diagnosis is infrequently missed if the patient presents with the classic symptoms of fever, headache, rash, nuchal rigidity, or Kernig or Brudzinski sign. However, it may be less obvious in neonates, elderly, or immunocompromised patients. Meningitis which presents as isolated torticollis, without any other signs or symptoms, is exceedingly rare. Objective. To identify an abnormal presentation of meningitis in an adult immunocompromised patient. Case Report. We present a case of an adult diabetic male who presented multiple times to the ED with complaint of isolated torticollis, who ultimately was diagnosed with bacterial meningitis. Conclusion. We propose that in the absence of sufficient explanation for acute painful torticollis in an immunocompromised adult patient, further evaluation, possibly including a lumbar puncture may be warranted.

  16. Unusual presentation of Klinefelter syndrome

    Directory of Open Access Journals (Sweden)

    Chanchal Das

    2013-01-01

    Full Text Available Introduction: Klinefelter syndrome usually presents in the puberty and adulthood with its characteristic features. We report a boy who had Klinefelter syndrome with hypospadias and hydrocele. Case Note: Six and half year old boy had complaints of genitourinary problem in the form of hypospadias, small phallus and hydrocele. Karyotyping showed 47,XXY. Conclusion: This case illustrates that Klinefelter syndrome was presented in the infancy with hypospadias and hydrocele which are very uncommon presentation of the disease

  17. Atypical presentation of atypical amyloid.

    Science.gov (United States)

    Holanda, Danniele G; Acharya, Veena K; Dogan, Ahmet; Racusen, Lorraine C; Atta, Mohamed G

    2011-01-01

    Amyloidosis is a group of diseases categorized by precipitation of a group of protein aggregates (amyloid) in tissues, including the kidney, and proteinuria is usually the commonest, though not exclusive, hallmark of clinical presentation. AL and AA are the most commonly recognized forms of amyloidosis involving the kidney, but other forms have been described. We present a case of renal amyloidosis due to a novel amyloidogenic protein, leucocyte cell-derived chemotaxin 2, without proteinuria at presentation or on subsequent follow-up.

  18. Unusual presentation of gallbladder perforation

    OpenAIRE

    Jayasinghe, G.; Adam, J.; Abdul-Aal, Y.

    2016-01-01

    Introduction: Gall bladder perforation is associated with high mortality rates and therefore must be recognised and managed promptly. We present an unusual presentation of spontaneous gall bladder perforation. Case presentation: An elderly lady with multiple medical co-morbidities was admitted with sepsis following a fall. Initial assessment lead to a diagnosis of pneumonia, however a rapidly expanding right flank mass was incidentally noted during routine nursing care. Imaging studies wer...

  19. Presentation of Neonatal Sinovenous Thrombosis

    Directory of Open Access Journals (Sweden)

    J Gordon Millichap

    2008-09-01

    Full Text Available Signs, risk factors, comorbidities, and radiographic findings in 59 neonates presenting with sinovenous thrombosis are reported from Indiana University School of Medicine, Indianapolis, IN.

  20. MHC Class I Antigen Presentation- Recently Trimmed and Well Presented

    Institute of Scientific and Technical Information of China (English)

    BarryFlutter; BinGao

    2004-01-01

    Presentation of antigenic peptide to T cells by major histocompatibility complex (MHC) class I molecules is the key to the cellular immune response. Non-self intracellular proteins are processed into short peptides and transported into endoplasmic reticulum (ER) where they are assembled with class I molecules assisted by several chaperone proteins to form trimeric complex. MHC class I complex loaded with optimised peptides travels to the cell surface of antigen presentation cells to be recognised by T cells. The cells presenting non-self peptides are cleared by CD8 positive T cells. In order to ensure that T cells detect an infection or mutation within the target cells the process of peptide loading and class I expression must be carefully regulated. Many of the cellular components involved in antigen processing and class I presentation are known and their various functions are now becoming clearer. Cellular & Molecular Immunology. 2004;1(1):22-30.

  1. MHC Class Ⅰ Antigen Presentation- Recently Trimmed and Well Presented

    Institute of Scientific and Technical Information of China (English)

    Barry Flutter; Bin Gao

    2004-01-01

    Presentation of antigenic peptide to T cells by major histocompatibility complex (MHC) class Ⅰ molecules is the key to the cellular immune response. Non-self intracellular proteins are processed into short peptides and transported into endoplasmic reticulum (ER) where they are assembled with class Ⅰ molecules assisted by several chaperone proteins to form trimeric complex. MHC class Ⅰ complex loaded with optimised peptides travels to the cell surface of antigen presentation cells to be recognised by T cells. The cells presenting non-self peptides are cleared by CD8 positive T cells. In order to ensure that T cells detect an infection or mutation within the target cells the process of peptide loading and class Ⅰ expression must be carefully regulated. Many of the cellular components involved in antigen processing and class Ⅰ presentation are known and their various functions are now becoming clearer. Cellular & Molecular Immunology. 2004;1(1):22-30.

  2. Twisting lipoma presenting as appendicitis-a rare presentation.

    Science.gov (United States)

    Sathyakrishna, Basavapatna Ramakrishnaiah; Boggaram, Suryanarayan Giridhar; Jannu, Nagamalleswara Rao

    2014-08-01

    Right iliac fossa (RIF) pain is the most common presenting complaint in the general surgical ward. Though there are several causes for the RIF pain, acute appendicitis is the first and common diagnosis. Here we present one of the rare differential diagnoses of RIF pain in a young female patient with one month history of intermittent right lower abdominal pain. Patient's symptoms and clinical findings indicated acute appendicitis, though ultrasonography didn't show any significant abnormality. Through diagnostic laparoscopy we found that there was torsion of anterior abdominal wall parietal peritoneal pedunculated lipoma located in RIF region. The clinical presentation, examination, investigation, laparoscopic findings and further management is presented in this case report.

  3. Present status of processing method

    Energy Technology Data Exchange (ETDEWEB)

    Kosako, Kazuaki [Sumitomo Atomic Energy Industries Ltd., Tokyo (Japan)

    1998-11-01

    Present status of processing method for a high-energy nuclear data file was examined. The NJOY94 code is the only one available to the processing. In Japan, present processing used NJOY94 is orienting toward the production of traditional cross section library, because a high-energy transport code using a high-energy cross section library is indistinct. (author)

  4. Neutrino astronomy: Present and future

    Indian Academy of Sciences (India)

    Thomas McCauley

    2006-10-01

    I briefly review the present and future status of the burgeoning field of neutrino astronomy. I outline the astrophysics and particle physics goals, design, and performance of the various current and proposed neutrino telescopes. Also described are present results and future expectations.

  5. Multiphasic presentation of Rasmussen's encephalitis

    NARCIS (Netherlands)

    A. Avbersek; A. Miserocchi; A.W. McEvoy; A.V. Patel; E. Aronica; I. Blumcke; T.S. Jacques; J. Acheson; M. Thom; S.M. Sisodiya

    2015-01-01

    Rasmussen's encephalitis is a rare, chronic inflammatory disorder of unknown cause, characterised by drug-resistant focal epilepsy that may rarely present in adolescence or adulthood. We present a case of Rasmussen's encephalitis with prominent recurrent fluctuation in symptoms and well-documented f

  6. Preparing Slide Presentations on Computers.

    Science.gov (United States)

    Elberfeld, John K.

    1982-01-01

    Suggest use of well-organized slide presentation as effective way to introduce computers to large audiences and discusses how to get started--state objective, analyze audience, outline presentation, prepare slides--and equipment needed to obtain slides from television screens, miniature components, and book illustrations. References and sources…

  7. Integrating Financial Analysis into Presentations

    Science.gov (United States)

    Saatci, Elizabeth

    2004-01-01

    Assignments that combine case studies with applied research can work for presentations as well as for written reports. One such assignment that has proven to be successful both in the author's classes and later in the students' professional lives is based on (1) incorporating banking concepts and encouraging their use in presentations; (2)…

  8. Presentation Skills Workshops for Nurses.

    Science.gov (United States)

    Kinn, S.; Kenyon, M.

    2002-01-01

    Workshops were held to prepare nurses (n=87) to present results of professional activities. One year after the course, 20 had made oral and 30 written presentations. The workshops increased their confidence and were considered practical, informal, and nonthreatening. (Contains 31 references.) (SK)

  9. Let's Talk about Student Presentations

    Science.gov (United States)

    Doree, Suzanne; Jardine, Richard; Linton, Thomas

    2007-01-01

    This article offers our ideas on why it is important to teach our students how to speak about mathematics and some practical resources for incorporating speaking activities, helping students prepare, evaluating student presentations, and getting your department to talk about student presentations. The ideas in this article were compiled when the…

  10. Atypical presentations of Wolframs syndrome

    Directory of Open Access Journals (Sweden)

    S Saran

    2012-01-01

    Full Text Available Background: Wolfram syndrome is a rare hereditary or sporadic neurodegenerative disorder also known as DIDMOAD. The classically described presentation is of insulin-dependent diabetes, followed by optic atrophy, central diabetes insipidus, and sensory neural deafness. Also included are less well-described presentations of Wolframs syndrome. We here present three cases of atypical presentation of this syndrome. Case 1: A 15-year-old boy with insulin-dependent diabetes was presented for evaluation of depressive symptoms associated with suicidal tendency. Neuropsychiatric manifestations are described with Wolframs syndrome, and wolframin gene, in recessive inheritance, is associated with psychiatric illnesses without other manifestations of Wolframs syndrome. Case 2: A 17-year-old diabetic boy on insulin with good control of blood sugar presented for evaluation of delayed puberty. Central hypogonadism and other anterior pituitary hormone dysfunctions are the less publicized hormone dysfunctions in Wolframs syndrome. Case 3: A 23-year-old female who was on insulin for diabetes for the past 14 years, got admitted for evaluation of sudden loss of vision. This patient had developed a vitreous hemorrhage and, on evaluation, was found to have optic atrophy, sensory neural hearing loss, and diabetes insipidus, and presented differently from the gradual loss of vision described in Wolframs syndrome. Conclusion: Wolframs syndrome being a multisystem degenerative disorder can have myriad other manifestations than the classically described features. Neuropsychiatric manifestations, depression with suicidal risk, central hypogonadism, and secondary adrenal insufficiency are among the less well-described manifestations of this syndrome.

  11. An unusual presentation of sporotrichosis

    Directory of Open Access Journals (Sweden)

    S S Vaishampayan

    2013-01-01

    Full Text Available Sporotrichosis can mimic a few diseases. Sporotrichosis presenting as a hypoaesthetic plaque or plaque suggestive of leprosy has not been mentioned in literature. Herein we present a case of a 26 years old man who presented with hypoesthetic plaque on left ankle and was clinically diagnosed to have borderline tuberculoid leprosy who later developed few nodules in linear fashion on left leg, which ruptured to form non healing ulcers. Culture from ulcer grew Sporothrix schenckii. Patient was successfully treated with oral potassium iodide.

  12. Visual presentation and computer animation

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Hua.

    1991-01-01

    This paper presents an assessment of the current computer graphics and video technologies as they applied to the fields of visual presentation and computer animation, including a discussion of inherent incompatibilities between computer graphics and video systems. The near-term technology trend is directed towards the integration of sound, video and computer graphics into a multimedia, desktop presentation system. With the forthcoming High-Definition Television (HDTV) standard, it can be predicted that computer graphics and video will eventually be integrated to a desktop video system. Recent advances in technology development to achieve these goals are described. 3 tabs.

  13. Galactosemia presenting as recurrent sepsis.

    Science.gov (United States)

    Rathi, Narendra; Rathi, Akanksha

    2011-12-01

    Galactosemia is a treatable metabolic disorder caused by the deficiency of enzyme galactose-1-phosphate uridyl transferase (GALT) and inherited as an autosomal recessive trait. A case of neonate manifesting with recurrent Escherichia coli sepsis is presented here which turned out to be a classic galactosemia. No other common presenting features were observed in this infant except cataract on slit lamp examination. To the best of our knowledge, there is no case of galactosemia reported in literature which presented with recurrent neonatal sepsis without hepatomegaly, hyperbilirubinemia, bleeding disorder, vomiting, diarrhea, failure to thrive, hypoglycemia, coagulopathy, hemolysis or renal tubular acidosis.

  14. The nature of the present

    CERN Document Server

    Romero, Gustavo E

    2012-01-01

    The feeling of a moving present or `now' seems to form part of our most basic perceptions about reality. Such a present, however, is not reflected in any of our theories of the physical world. In this short note I argue for a tenseless view of time, where what we call `the present' is just an emergent secondary quality arising from the interaction of perceiving self-conscious individuals with their environment. I maintain that there is no flow of time, but just an ordered system of events.

  15. Blastomycosis presenting as solitary nodule: A rare presentation

    Directory of Open Access Journals (Sweden)

    Ashish Dhamija

    2012-01-01

    Full Text Available Blastomycosis is a chronic granulomatous and suppurative mycosis, caused by Blastomyces dermatitidis, which in the great majority of cases presents as a primary pulmonary disease. Primary cutaneous blastomycosis is very rare. We present a 57-year-old female patient with a solitary, slowly progressive nodule over upper lip of 2½ months duration. Initially, differential diagnosis of cutaneous leishmaniasis, pyoderma and deep mycoses were entertained. Slit smear preparation was suspicious of deep mycotic infection which was subsequently confirmed by biopsy and culture.

  16. Caractérisation phytochimique de l'espèce saharo-endémique Myrtus nivellei Batt & Trab (Myrtaceae

    Directory of Open Access Journals (Sweden)

    Meriem TOUAIBIA

    2014-05-01

    Full Text Available Cette étude est basée sur la valorisation d'une plante endémique du Sahara Algérien: l'espèce Myrtus nivellei Batt & Trab. L’extraction de sa fraction aromatique volatile et de ses composés polaires offre de nouvelles perspectives sur ses éventuelles propriétés pharmacologiques. L'huile essentielle, extraite par entrainement à la vapeur, a donné un rendement de 2,91%. L'analyse de sa composition chimique par CG/SM a révélé la présence d'une forte proportion en sesquiterpènes hydrocarbonés (δ-elemene 15,69% et Azulène 6,18%, en monoterpènes oxygénés (1,8 cinéole 12,06% et en alcools monoterpéniques (α-terpinéol 13,01%. L'analyse de l'extrait ethanolique a révélé sa richesse en polyphenols totaux (734 μg eq/mg ES, en flavonoïdes (181,1 μg eq/mg ES, en flavonols (711,75 μg eq/mg ES, en anthocyanes (25,5 μg eq/mg ES et en sucres totaux (17,26 μg eq/mg ES, alors que l'extraits méthanolique a présenté des teneurs moindres mais s'est montré remarquablement riche en tanins (155,27 μg eq/mg ES. Myrtus nivellei Batt & Trab.; huile essentielle; extraits; polyphenols

  17. Geographical variations of the constituents of the essential oil of Crithmum maritimum L., Apiaceae.

    Science.gov (United States)

    Coiffard, L; Piron-Frenet, M; Amicel, L

    1993-02-01

    Synopsis Crithmum maritimum L. is a halophyte and chasmophyte apiaceous plant, which grows on all the world's coastlines but is particularly abundant in France. The essential oil obtained by steam distillation from samples of leaves of Crithmum maritimum L. gathered in two areas of France, Brittany and Provence, was analysed first by ultraviolet spectroscopy and secondly by capillary GC. In the first analysis, two distinct UV spectra were obtained depending on the two origins. In all, about 27 components were identified in the two sample types by GC, and they were quantified when possible. Dillapiole is the main constituent representing 75% of the oil whatever its origin. Résumé Crithmum maritimum L. est une plante halophyte et chasmophyte de la famille des Apiacées qui pousse sur toutes les côtes rocheuses, et qui est particulièrement abondante en France. L'huile essentielle a été obtenue par distillation à la vapeur d'eau à partir d'échantillons de feuilles de la plante recueillie dans deux régions françaises, la Bretagne et la Provence. Elle a été analysée d'abord en spectroscopie ultra-violette puis par chromatographie en phase gazeuse sur colonne capillaire. Les premières analyses montrent deux spectres UV distincts en fonction des origines. L'analyse chromatographique a permis d'identifier 27 composants qui ont été quantifiés dans certains cas. Le dillapiole est le constituant principal représentant 75% de l'huile essentielle quelqu'en soit l'origine géographique.

  18. A centralized audio presentation manager

    Energy Technology Data Exchange (ETDEWEB)

    Papp, A.L. III; Blattner, M.M.

    1994-05-16

    The centralized audio presentation manager addresses the problems which occur when multiple programs running simultaneously attempt to use the audio output of a computer system. Time dependence of sound means that certain auditory messages must be scheduled simultaneously, which can lead to perceptual problems due to psychoacoustic phenomena. Furthermore, the combination of speech and nonspeech audio is examined; each presents its own problems of perceptibility in an acoustic environment composed of multiple auditory streams. The centralized audio presentation manager receives abstract parameterized message requests from the currently running programs, and attempts to create and present a sonic representation in the most perceptible manner through the use of a theoretically and empirically designed rule set.

  19. Gearbox Reliability Collaborative Update (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Sheng, S.; Keller, J.; Glinsky, C.

    2013-10-01

    This presentation was given at the Sandia Reliability Workshop in August 2013 and provides information on current statistics, a status update, next steps, and other reliability research and development activities related to the Gearbox Reliability Collaborative.

  20. Research Ethics Timeline (1932-Present)

    Science.gov (United States)

    ... conflicts of interest. Penn settles with the Gelsinger family for an undisclosed amount of money. 1999-present Human research lawsuits increase dramatically. Alan Milstein, from the law firm Sherman, Silverstein, Kohl, Rose & Podolsky, P.A., instigates ...

  1. Extradural lipomatosis presenting with paraplegia.

    Directory of Open Access Journals (Sweden)

    Deogaonkar M

    1995-07-01

    Full Text Available An unusual case with spinal extradural lipomatosis in a non-obese and otherwise healthy man is reported. The patient presented with a history of weakness of legs which progressed to paraplegia over a 40 day period.

  2. Wind Technologies & Evolving Opportunities (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Robichaud, R.

    2014-07-01

    This presentation covers opportunities for wind technology; wind energy market trends; an overview of the National Wind Technology Center near Boulder, Colorado; wind energy price and cost trends; wind turbine technology improvements; and wind resource characterization improvements.

  3. Anal fistula. Past and present

    National Research Council Canada - National Science Library

    Zubaidi, Ahmad M

    2014-01-01

    Anal fistula is a common benign condition that typically describes a miscommunication between the anorectum and the perianal skin, which may present de novo, or develop after acute anorectal abscess...

  4. BioFuels Atlas (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Moriarty, K.

    2011-02-01

    Presentation for biennial merit review of Biofuels Atlas, a first-pass visualization tool that allows users to explore the potential of biomass-to-biofuels conversions at various locations and scales.

  5. AN UNUSUAL PRESENTATION OF DIC

    Directory of Open Access Journals (Sweden)

    Manish

    2015-10-01

    Full Text Available Placenta Praevia is a common obstetric problem which presents with antepartum H aemorrhage and is treated by the obstetrician. It is very rare to see a patient with placenta praevia treated in medical ward for post - partum H aemorrhage due to disseminated intravascular coagulation defect with the added complication of acute kidney injury, P ost - partum H ypertension and PRES (posterior reversible encephalopathy syndrome, hence the presentation

  6. Colovesical fistula presenting with epididymitis

    OpenAIRE

    2013-01-01

    This article reports a case of colovesical fistula presenting with epididymitis. A 75-year-old man with a recent conservatively managed localised diverticular perforation presented to hospital with acute pain and swelling of his left testicle and epididymis. On further questioning, the patient reported passing air in his urine. Urine cultures grew Enterococcus faecalis. Ultrasound scan confirmed a diagnosis of bacterial epididymitis and the patient was treated with intravenous antibiotics. Su...

  7. Peripartum Cardiomyopathy Presenting as Bradycardia

    Directory of Open Access Journals (Sweden)

    Elisabeth Codsi

    2017-01-01

    Full Text Available Peripartum cardiomyopathy (PPCM is a disease that typically affects young otherwise healthy women. As PPCM is associated with significant mortality, timely diagnosis is necessary to ensure appropriate care. To our knowledge, this represents the first reported case of PPCM presenting as symptomatic bradycardia. We describe the patient’s clinical presentation and relevant findings and review the potential etiology and ramifications of bradycardia in patients with PPCM.

  8. Peripartum Cardiomyopathy Presenting as Bradycardia

    Science.gov (United States)

    Rose, Carl H.; Tweet, Marysia S.; Hayes, Sharonne N.; Best, Patricia J. M.; Blauwet, Lori A.

    2017-01-01

    Peripartum cardiomyopathy (PPCM) is a disease that typically affects young otherwise healthy women. As PPCM is associated with significant mortality, timely diagnosis is necessary to ensure appropriate care. To our knowledge, this represents the first reported case of PPCM presenting as symptomatic bradycardia. We describe the patient's clinical presentation and relevant findings and review the potential etiology and ramifications of bradycardia in patients with PPCM.

  9. Teaching of Multimedia Presentation Creation

    OpenAIRE

    Ingrid Nagyová; Milan Turčáni

    2008-01-01

    Multimedia presentation has its well-founded place in classwork and in the teaching process itself. Multimedia enables teachers to speak to their pupils and students through pictures and sounds. Computer presentation accompanies the teacher in the teaching process that thus becomes more comprehensive, well-considered and effective. In addition classwork supported by multimedia activities is more interesting and attractive for students. There is no doubt that the competence and skill in creati...

  10. Dissociative Disorder Presenting as Catatonia

    OpenAIRE

    Sarkar, P; Patra, B.; Sattar, F.A.; Chatterjee, K.; Gupta, A; Walia, T.S.

    2004-01-01

    Three cases of dissociative disorder presenting with catatonia are described. Catatonia is generally believed to be associated with schizophrenia. However, many other conditions are also known to cause catatonia. A brief review of literature is provided. All the cases improved rapidly with a few ECTs. This report aims to highlight the presentation of dissociative disorders with catatonia. It also seeks to bring to notice the need to avoid lumping all non-organic catatonics under the rubric of...

  11. A rare presentation of hypothyroidism

    Directory of Open Access Journals (Sweden)

    Betsy Mathew

    2014-02-01

    Full Text Available In this case report, we have brought out a very rare presentation of hypothyroidism in the form of cataplexy and this case is of significance because there have been no similar case reports of hypothyroidism presenting as cataplexy so far. The other highlight of the case is that treatment of hypothyroidism alone resulted in complete freedom from cataplexy without the need for agrypnotic drugs. [Int J Res Med Sci 2014; 2(1.000: 328-329

  12. Unusual presentation of cutaneous leiomyoma

    Directory of Open Access Journals (Sweden)

    Sapnashree Bhaskar

    2014-01-01

    Full Text Available Herein, we report a case of leiomyoma cutis because of its rarity and unusual presentation. The case presented with a solitary leiomyoma lesion which was painless. However, the adjacent normal appearing area was tender. A biopsy of the lesion as well as of a portion of the adjacent normal appearing area was taken, which confirmed the diagnosis of cutaneous leiomyoma. This may suggest the dormant nature of the disease which has not yet become apparent.

  13. Unusual Presentation of Cutaneous Leiomyoma

    Science.gov (United States)

    Bhaskar, Sapnashree; Jaiswal, Ashok K; Madhu, SM; Santosh, KV

    2014-01-01

    Herein, we report a case of leiomyoma cutis because of its rarity and unusual presentation. The case presented with a solitary leiomyoma lesion which was painless. However, the adjacent normal appearing area was tender. A biopsy of the lesion as well as of a portion of the adjacent normal appearing area was taken, which confirmed the diagnosis of cutaneous leiomyoma. This may suggest the dormant nature of the disease which has not yet become apparent. PMID:25484434

  14. Presenting and Evaluating Qualitative Research

    OpenAIRE

    Anderson, Claire

    2010-01-01

    The purpose of this paper is to help authors to think about ways to present qualitative research papers in the American Journal of Pharmaceutical Education. It also discusses methods for reviewers to assess the rigour, quality, and usefulness of qualitative research. Examples of different ways to present data from interviews, observations, and focus groups are included. The paper concludes with guidance for publishing qualitative research and a checklist for authors and reviewers.

  15. Neonatal hemophilia: a rare presentation

    Directory of Open Access Journals (Sweden)

    Nuno Ferreira

    2015-12-01

    Full Text Available Hemophilia A is a X-linked hereditary condition that lead to decreased factor VIII activity, occurs mainly in males. Decreased factor VIII activity leads to increased risk of bleeding events. During neonatal period, diagnosis is made after post-partum bleeding complication or unexpected bleeding after medical procedures. Subgaleal hemorrhage during neonatal period is a rare, severe extracranial bleeding with high mortality and usually related to traumatic labor or coagulation disorders. Subgaleal hemorrhage complications result from massive bleeding. We present a neonate with unremarkable family history and uneventful pregnancy with a vaginal delivery with no instrumentation, presenting with severe subgaleal bleeding at 52 hours of life. Aggressive support measures were implemented and bleeding managed. The unexpected bleeding lead to a coagulation study and the diagnosis of severe hemophilia A. There were no known sequelae. This case shows a rare hemophilia presentation reflecting the importance of coagulation studies when faced with unexplained severe bleeding.

  16. Colovesical fistula presenting with epididymitis.

    Science.gov (United States)

    Arneill, Matthew; Hennessey, Derek Barry; McKay, Damian

    2013-04-23

    This article reports a case of colovesical fistula presenting with epididymitis. A 75-year-old man with a recent conservatively managed localised diverticular perforation presented to hospital with acute pain and swelling of his left testicle and epididymis. On further questioning, the patient reported passing air in his urine. Urine cultures grew Enterococcus faecalis. Ultrasound scan confirmed a diagnosis of bacterial epididymitis and the patient was treated with intravenous antibiotics. Subsequent CT imaging revealed air in the bladder and a colovesical fistula. The patient went on to have Hartmann's procedure with repair of the bladder defect. This case highlights that: (1) Colovesical fistulae may rarely present with epididymitis. (2) Colovesical fistulae are the most common cause of pneumaturia.

  17. Thick Presentism and Newtonian Mechanics

    CERN Document Server

    Lubashevsky, Ihor

    2016-01-01

    In the present paper I argue that the formalism of Newtonian mechanics stems directly from the general principle to be called the principle of microlevel reducibility which physical systems obey in the realm of classical physics. This principle assumes, first, that all the properties of physical systems must be determined by their states at the current moment of time, in a slogan form it is "only the present matters to physics." Second, it postulates that any physical system is nothing but an ensemble of structureless particles arranged in some whose interaction obeys the superposition principle. I substantiate this statement and demonstrate directly how the formalism of differential equations, the notion of forces in Newtonian mechanics, the concept of phase space and initial conditions, the principle of least actions, etc. result from the principle of microlevel reducibility. The philosophical concept of thick presentism and the introduction of two dimensional time---physical time and meta-time that are mut...

  18. Dexmedetomidine overdosage: An unusual presentation

    Directory of Open Access Journals (Sweden)

    Soumya S Nath

    2013-01-01

    Full Text Available We present a case of dexmedetomidine toxicity in a 3-year-old child. The case report describes the features and outlines the treatment strategy adopted. The child presented with bradypnoea, bradycardia, hypotension, deep hypnosis and miosis. He was successfully managed with oxygen, saline boluses and adrenaline infusion. He became haemodynamically stable with adrenaline infusion. He started responding to painful stimuli in 3 h and became oriented in 7 h. Dexmedetomidine, a selective α2 adrenoceptor agonist, is claimed to have a wide safety margin. This case report highlights the fact that dexmedetomidine administered in a toxic dose may be life-threatening may present with miosis and adrenaline infusion may be a useful supportive treatment.

  19. Comprehensible Presentation of Topological Information

    Energy Technology Data Exchange (ETDEWEB)

    Weber, Gunther H. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Beketayev, Kenes [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Bremer, Peer-Timo [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Hamann, Bernd [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Haranczyk, Maciej [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Hlawitschka, Mario [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Pascucci, Valerio [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2012-03-05

    Topological information has proven very valuable in the analysis of scientific data. An important challenge that remains is presenting this highly abstract information in a way that it is comprehensible even if one does not have an in-depth background in topology. Furthermore, it is often desirable to combine the structural insight gained by topological analysis with complementary information, such as geometric information. We present an overview over methods that use metaphors to make topological information more accessible to non-expert users, and we demonstrate their applicability to a range of scientific data sets. With the increasingly complex output of exascale simulations, the importance of having effective means of providing a comprehensible, abstract overview over data will grow. The techniques that we present will serve as an important foundation for this purpose.

  20. Organizing MHC Class II Presentation

    Directory of Open Access Journals (Sweden)

    David R Fooksman

    2014-04-01

    Full Text Available Major histocompatibility complex (MHC class II molecules are ligands for CD4+ T cells and are critical for initiating the adaptive immune response. This review is focused on what is currently known about MHC class II organization at the plasma membrane of antigen presenting cells and how this affects antigen presentation to T cells. The organization and diffusion of class II molecules have been measured by a variety of biochemical and microscopic techniques. Membrane lipids and other proteins have been implicated in MHC class II organization and function. However, when compared with the organization of MHC class I or TCR complexes, much less is known about MHC class II. Since clustering of T cell receptors occurs during activation, the organization of MHC molecules prior to recognition and during synapse formation may be critical for antigen presentation.

  1. Colovesical fistula presenting with epididymitis

    Science.gov (United States)

    Arneill, Matthew; Hennessey, Derek Barry; McKay, Damian

    2013-01-01

    This article reports a case of colovesical fistula presenting with epididymitis. A 75-year-old man with a recent conservatively managed localised diverticular perforation presented to hospital with acute pain and swelling of his left testicle and epididymis. On further questioning, the patient reported passing air in his urine. Urine cultures grew Enterococcus faecalis. Ultrasound scan confirmed a diagnosis of bacterial epididymitis and the patient was treated with intravenous antibiotics. Subsequent CT imaging revealed air in the bladder and a colovesical fistula. The patient went on to have Hartmann's procedure with repair of the bladder defect. This case highlights that: (1) Colovesical fistulae may rarely present with epididymitis. (2) Colovesical fistulae are the most common cause of pneumaturia. PMID:23616326

  2. RENAL PAPYLAR NECROSIS - RADIOLOGICAL PRESENTATION

    Directory of Open Access Journals (Sweden)

    Rade R. Babic

    2003-10-01

    Full Text Available Renal papylar necrosis is rare disease. It is diagnosed by intravenous urography. Radio-logical presentation is patognomonical: necrotis focus of the papila, on the urogram is visualised as a punctiformne, blot spot of the iodine contrast, or the depots of the iodine contrast are spread from the edge of fornix to the renal medulla as a ribbon-like or needle-shaped formations, apear-ing in a late phase of illness like a crebs legs or feeler, sometimes convergning in the oreol or in ring-shaped formation, while necrotic sequestar is resorbed formating the cavity filled by iodine contrast, which has trigonal shape with the lateral basis, or necrotican sequestar can be removed with the channel system obstruction, presenting with the picture of ureterohydronephrosis, caused by the organic concrement. In the late stadium of the desease necrotic cavity can present with calcified wall and it can be diagnoses also at the native radiogram of the urotract.

  3. Technical presentation: Next Generation Oscilloscopes

    CERN Multimedia

    PH Department

    2011-01-01

      Rohde & Schwarz "Next Generation Oscilloscopes" - Introduction and Presentation Agenda: Wednesday 23 March  -  09:30 to 11:30 (open end) Bldg. 13-2-005 Language: English 09.30 Presentation "Next Generation Oscilloscopes" from Rohde & Schwarz RTO / RTM in theory and practice Gerard Walker 10.15 Technical design details from R&D Dr. Markus Freidhof 10.45 Scope and Probe Roadmap (confidential) Guido Schulze 11.00 Open Discussion Feedback, first impression, wishes, needs and requirements from CERN All 11.30 Expert Talks, Hands on All Mr. Dr. Markus Freidhof, Head of R&D Oscilloscopes, Rohde & Schwarz, Germany; Mr. Guido Schulze, ...

  4. Water plants past and present

    DEFF Research Database (Denmark)

    Riis, T.; Sand-Jensen, K.

    2006-01-01

    How has the condition of the environment developed during the last 100 years? This is an important question because the conditions of the past infl uence those of the present, and knowledge about this development makes it possible to evaluate the causes of changes in species richness, species com...

  5. Hypervideos and interactive multimedia presentations

    NARCIS (Netherlands)

    B. Meixner (Britta)

    2017-01-01

    textabstractHypervideos and interactive multimedia presentations allow the creation of fully interactive and enriched video. It is possible to organize video scenes in a nonlinear way. Additional information can be added to the video ranging from short descriptions to images and more videos.

  6. Sex and acute stroke presentation.

    Science.gov (United States)

    Labiche, Lise A; Chan, Wenyaw; Saldin, Kamaldeen R; Morgenstern, Lewis B

    2002-11-01

    We determine whether a sex difference exists for acute stroke emergency department presentation. The TLL Temple Foundation Stroke Project is a prospective observational study of acute stroke management that identified 1,189 validated strokes in nonurban community EDs from February 1998 to March 2000. Structured interview of the patient and the person with the patient at symptom onset identified the symptom or symptoms that prompted the patient to seek medical attention. Interview data were available for 1,124 (94%) patients. A physician blinded to sex classified the reported symptoms into 14 categories. Nontraditional stroke symptoms were reported by 28% of women and 19% of men (odds ratio 1.62; 95% confidence interval 1.2 to 2.2). Nontraditional stroke symptoms, pain (men 8%, women 12%) and change in level of consciousness (men 12%, women 17%), were more often reported by women. Traditional stroke symptoms, imbalance (men 20%, women 15%) and hemiparesis (men 24%, women 19%), were reported more frequently by men. Trends were also found for women to present with nonneurologic symptoms (men 17%, women 21%) and men to present with gait abnormalities (men 11%, women 8%). There was no sex difference in the mean number of symptoms reported by an individual patient. This study suggests that a sex difference exists in reporting of acute stroke symptoms. Women with validated strokes present more frequently with nontraditional stroke symptoms than men. Recognition of this difference might yield faster evaluation and management of female patients with acute stroke eligible for acute therapies.

  7. Reninoma presenting as cardiac syncope

    Directory of Open Access Journals (Sweden)

    Tak Shahid

    2011-01-01

    Full Text Available Reninoma, a renin-secreting tumor of the juxta-glomerular cells of the kidney, is a rare but surgically treatable cause of secondary hypertension in children. We report a case of reninoma presenting as cardiac syncope with long QTc on electrocardiogram due to hypokalemia.

  8. Delusional disorder: an unusual presentation.

    Science.gov (United States)

    Noel, Joseph; Krishnadas, Ranjit; Gopalakrishnan, Rajesh; Kuruvilla, Anju

    2014-10-01

    Delusions with a sexual theme are rare, but when present are usually seen in patients with schizophrenia or other chronic psychotic disorders. We report a case of delusional disorder, with a single belief of a sexual theme. This report focuses on the management issues, wherein a combination of pharmacological and nonpharmacological interventions proved helpful.

  9. Delusional Disorder: An Unusual Presentation

    OpenAIRE

    Joseph Noel; Ranjit Krishnadas; Rajesh Gopalakrishnan; Anju Kuruvilla

    2014-01-01

    Delusions with a sexual theme are rare, but when present are usually seen in patients with schizophrenia or other chronic psychotic disorders. We report a case of delusional disorder, with a single belief of a sexual theme. This report focuses on the management issues, wherein a combination of pharmacological and nonpharmacological interventions proved helpful.

  10. Water plants past and present

    DEFF Research Database (Denmark)

    Riis, T.; Sand-Jensen, K.

    2006-01-01

    How has the condition of the environment developed during the last 100 years? This is an important question because the conditions of the past infl uence those of the present, and knowledge about this development makes it possible to evaluate the causes of changes in species richness, species...

  11. Understanding Algorithms in Different Presentations

    Science.gov (United States)

    Csernoch, Mária; Biró, Piroska; Abari, Kálmán; Máth, János

    2015-01-01

    Within the framework of the Testing Algorithmic and Application Skills project we tested first year students of Informatics at the beginning of their tertiary education. We were focusing on the students' level of understanding in different programming environments. In the present paper we provide the results from the University of Debrecen, the…

  12. BVDV: past, present, and future

    Science.gov (United States)

    The term bovine viral diarrhea (BVD) has come to refer to a collection of diverse clinical presentations that include respiratory, enteric and reproductive diseases accompanied by immunosuppression. BVD may be caused by one of three different species of bovine pestivirus, bovine viral diarrhea viru...

  13. Unusual presentation of gallbladder perforation

    Directory of Open Access Journals (Sweden)

    G. Jayasinghe

    2016-01-01

    Conclusions: Percutaneous abscesses arising from the gallbladder are a rare but potentially serious consequence of acute cholecystitis, and may present in a wide variety of locations. Therefore it is imperative to conduct a full body inspection in the septic patient, even when a source has been identified.

  14. GENERALIZED LENTIGINOSIS: AN UNCOMMON PRESENTATION

    Directory of Open Access Journals (Sweden)

    Valluvan

    2014-05-01

    Full Text Available A case of Generalized Lentiginosis is being documented for its rarity. A 27 years old congenitally deaf and mute, presented to our hospital with multiple asymmetrical brown-black to black colored macules involving all over the body sparing mucous membrane of oral cavity, palms and soles with melena. The patient was severely anemic on examination.

  15. Testing for PV Reliability (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Kurtz, S.; Bansal, S.

    2014-09-01

    The DOE SUNSHOT workshop is seeking input from the community about PV reliability and how the DOE might address gaps in understanding. This presentation describes the types of testing that are needed for PV reliability and introduces a discussion to identify gaps in our understanding of PV reliability testing.

  16. Rare presentation of biliary ascariasis.

    Science.gov (United States)

    Rather, Ajaz; Salati, Sajad Ahmad

    2010-09-01

    Ascariasis is the most common helminthic infection in the world. We present a very rare manifestation of ascariasis in which the worms came out through the T-tube tract of a 36 years old patient who had undergone cholecystectomy with choledocholithotomy.

  17. The Present State of Behaviorism

    Science.gov (United States)

    Mowrer, O. Hobart

    1976-01-01

    Assesses the present status of behaviorism by dividing this study into an evaluation of Behaviorism 1, based explicitly on Pavlov's conception of conditioned-response learning, and Behaviorism 11, single-handedly launched and almost completely dominanted by Professor B. F. Skinner. (Author/RK)

  18. Learning through Dramatic Story Presentation

    Science.gov (United States)

    Tindall, Evie

    2012-01-01

    The use of story with dramatic presentation approaches produces an engaging and powerful instructional choice for today's adult ESL educators. Two engaging and timed-tested approaches are Reader's Theater and Tableau Vivant. Both provide English language learners with content tailored to their abilities in addition to numerable opportunities to…

  19. GEODSS Present Configuration and Potential

    Science.gov (United States)

    2014-06-28

    1. REPORT DATE 28 JUN 2014 2. REPORT TYPE 3. DATES COVERED 00-00-2014 to 00-00-2014 4. TITLE AND SUBTITLE GEODSS Present Configuration and...provides improved resolution and radiometric throughput at low elevation angles versus a single fisheye optical strategy. Both optical systems are

  20. Energy consumption: Past, present, future

    Science.gov (United States)

    1973-01-01

    The energy consumption history of the United States and the changes which could occur in consumption characteristics in the next 50 years are presented. The various sources of energy are analyzed to show the limitations involved in development and utilization as a function of time available. Several scenarios were prepared to show the consumption and supply of energy under varying conditions.

  1. Rose breeding: past, present, prospects

    NARCIS (Netherlands)

    Vries, de D.P.; Dubois, L.A.M.

    1996-01-01

    In this review the PAST, PRESENT and PROSPECT will be considered as three separate periods in the history of the breeding and development of rose cultivars. The recurring theme is the genetic variation. This theme was chosen because there is justified doubt as to sufficient genetic variation

  2. PEV Integration with Renewables (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Markel, T.

    2014-06-18

    This presentation discusses current research at NREL on integrating plug-in electric vehicles with the grid and using renewable energy to charge the grid. The Electric Vehicle Grid Integration (EVGI) and Integrated Network Testbed for Energy Grid Research and Technology Experimentation (INTEGRATE) are addressing the opportunities and technical requirements for vehicle grid integration that will increase marketability and lead to greater petroleum reduction.

  3. DOE Collegiate Wind Competition (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Jones, J.

    2014-02-01

    This presentation for the January Stakeholder Engagement and Outreach webinar outlines the expanded need for workers in the wind industry and provides an overview of the DOE Wind Competition (to be held in May 2014) and the guiding principles of the competition.

  4. Pemphigus vegetans: An unusual presentation

    Directory of Open Access Journals (Sweden)

    Ashish Dhamija

    2012-01-01

    Full Text Available Pemphigus vegetans is a rare variant of pemphigus vulgaris that is characterized by vegetating lesions primarily in the flexures. We report a 45-year-old male patient with an unusual presentation of the disease. A careful analysis of the clinical and laboratory findings enabled us to reach a diagnosis and successfully treat the patient.

  5. Rose breeding: past, present, prospects

    NARCIS (Netherlands)

    Vries, de D.P.; Dubois, L.A.M.

    1996-01-01

    In this review the PAST, PRESENT and PROSPECT will be considered as three separate periods in the history of the breeding and development of rose cultivars. The recurring theme is the genetic variation. This theme was chosen because there is justified doubt as to sufficient genetic variation availab

  6. Pulmonary hyalinizing granuloma presenting with dysphagia: a rare presentation.

    Science.gov (United States)

    Khan, Fazal; Hamid, Arsalan; Fatima, Benish; Hashmi, Shiraz; Fatimi, Saulat

    2017-01-01

    A 25-year-old man presented with a 2-month history of dysphagia and past history of pulmonary and intestinal tuberculosis. A barium swallow showed a point of constriction 42 mm above the gastroesophageal junction. Computed tomography revealed large opacities in bilateral lung fields, encroaching more on the esophagus. The lesion progressively compressed the esophagus as it moved inferiorly. A right posterolateral thoracotomy was performed for sub-anatomical resection of the mass. A biopsy revealed homogenous whirling hyalinized collagen fibers, highly suggestive of pulmonary hyalinizing granuloma, with no evidence of malignancy. Pulmonary hyalinizing granuloma should be considered in the differential diagnosis of longstanding dysphagia.

  7. Sheehan's syndrome presenting as psychosis: a rare clinical presentation.

    Science.gov (United States)

    Shoib, Sheikh; Dar, Mohamand Maqbool; Arif, Tasleem; Bashir, Haamid; Bhat, Mohammad Hayat; Ahmed, Javid

    2013-02-01

    Sheehan's syndrome (SS) refers to the occurrence of varying degree of hypopituitarism after parturition (1). It is a rare cause of hypopituitarism in developed countries owing to advances in obstetric care and its frequency is decreasing worldwide. However, it is still frequent in underdeveloped and developing countries. Sheehan's syndrome is often diagnosed late as it evolves slowly (2,3). Reports of psychoses in patients with Sheehan's syndrome are rare. Herein, a case report of psychosis in a 31 year old woman who developed Sheehan's syndrome preceded by postpartum haemorrhage is presented. Treatment with thyroxine and glucocorticoids resulted in complete remission after attaining euthyroid and eucortisolemic state.

  8. Presenting Data And Telling Stories

    Science.gov (United States)

    Eales, Philip; Wayne, Andrew; Tildsley, Kevin M.; Wilkinson, Tim; Prieto, Diego Fernandez

    2013-12-01

    Earth observation data are now readily available at a range of scales and becoming increasingly familiar to the general public. Observations built up over several decades enable us to show long-term change and tell increasingly complex stories about the Earth and other planets. Data visualisation and computer graphics can help present these stories to a non-specialist public audience. In addition to high visual quality and clear design, we have found it useful to present data within its geographical and scientific context, in natural colour, in a realistic and immersive environment, using familiar visual and physical metaphors. The internet increasingly allows direct communication with the public and this places renewed emphasis on basics such as good story-telling. Examples are shown of work in television, print and digital media, and from ESA's Earth observation and planetary exploration programmes.

  9. Pronunciation Teaching: Past and Present

    Directory of Open Access Journals (Sweden)

    Saeed Ketabi

    2015-09-01

    Full Text Available Pronunciation, despite being known as an important component of language learning, has not been awarded due attention within the field of language education. This article is a humble attempt to present an overview of the history of pronunciation teaching. Different approaches and methods of language teaching from the late nineteenth century into the new millennium are reviewed and discussed with regard to their stance in pronunciation instruction. Recent trends and issues of pronunciation teaching, e.g. intelligibility and Lingua Franca Core are also highlighted. Discussions like the present one might be beneficial in gaining a better understanding and evaluation of the status quo in order to improve and enhance the status of pronunciation instruction within language pedagogy. Keywords: Pronunciation instruction, Teaching methods, Intelligibility, Lingua Franca Core

  10. Present status of solar distillation

    Energy Technology Data Exchange (ETDEWEB)

    Tiwari, G.N.; Singh, H.N.; Tripathi, R. [Indian Inst. of Technology, New Delhi (India). Centre for Energy Studies

    2003-11-01

    In this communication an attempt has been made to review, in brief, work on solar distillation, its present status in the world today and its future perspective. The review also includes water sources, water demand, availability of potable water and purification methods including the state of art and historical background. The classification of distillation units has been done on the basis of literature survey till today. The basic heat and mass transfer relation responsible for developing, testing procedure for various designs of solar stills have also been discussed. The present status of solar distillation units in India, economics of single and double slope fibre reinforced plastic on the basis of long-term performance and recommendations for future have been discussed in brief. (author)

  11. Superior limb reimplantation. Case presentation.

    Directory of Open Access Journals (Sweden)

    Yovanny Ferrer Lozano

    2009-07-01

    Full Text Available Reimplantation surgery is only performed in highly specialized medical institutions. Its success is associate to the development and improvement of microsurgical techniques and to the constant training of the medical team. We present the case of a white patient of 17 years of age, who, as a result of an accident at the working place, suffered the total detachment of his upper right limb in the shoulder area. He was admitted in the emergency unit presenting hypovolemic shock and was immediately stabilized to perform later the limb reimplantation. The postsurgical development was satisfactory, proving that reimplantation can be considered a safe and functional practice in complex wounds or amputation affecting limbs.

  12. Unusual presentation of metastatic adenocarcinoma

    Directory of Open Access Journals (Sweden)

    Mudan Satvinder

    2007-10-01

    Full Text Available Abstract Background The most common tumours of the adrenal gland are adenoma, pheochromocytoma, adrenocortical carcinoma, and metastases. Although the imaging features of these tumours are established, the imaging characteristics of uncommon adrenal masses are less well known. In patients with extradrenal tumour, incidental discovery of an adrenal mass necessitates excluding the possibility of metastatic malignancy. Case presentation A 52 year-old female was diagnosed with oesophageal adenocarcinoma and treated with oesophagectomy and adjuvant chemotherapy. Sixteen months later on staging CT scan a 2 × 2 cm adrenal mass was detected, which increased in size over a period of time to 3 × 3 cm in size. Adrenalectomy was performed and histological examination revealed metastatic adenocarcinoma within an adrenal adenoma. Conclusion The present case highlights the unusual behaviour of an oesophageal adenocarcinoma causing metastasis to an adrenocortical adenoma.

  13. Wilson's Disease Presenting With Pancytopenia

    OpenAIRE

    Acıpayam, Can; Altunay, Ali; Nilüfer İLHAN; Atçı, Nesrin

    2015-01-01

    Wilson’s disease is an autosomal recessive disorder of copper metabolism characterized by excessive amount of copper in liver, brain, eye and other body tissues. Diagnosis is based on the presence of Kayser-Fleischer rings, typical neurological symptoms, and/or a low serum ceruloplasmin concentration. The main clinical symptoms are usually due to hepatic and/or neurologic involvement. Pancytopenia is a rare initial symptom of Wilson Disease. An 11-year-old female presented with pancytopenia. ...

  14. Sound and computer information presentation

    Energy Technology Data Exchange (ETDEWEB)

    Bly, S

    1982-03-01

    This thesis examines the use of sound to present data. Computer graphics currently offers a vast array of techniques for communicating data to analysts. Graphics is limited, however, by the number of dimensions that can be perceived at one time, by the types of data that lend themselves to visual representation, and by the necessary eye focus on the output. Sound offers an enhancement and an alternative to graphic tools. Multivariate, logarithmic, and time-varying data provide examples for aural representation. For each of these three types of data, the thesis suggests a method of encoding the information into sound and presents various applications. Data values were mapped to sound characteristics such as pitch and volume so that information was presented as sets or sequences of notes. In all cases, the resulting sounds conveyed information in a manner consistent with prior knowledge of the data. Experiments showed that sound does convey information accurately and that sound can enhance graphic presentations. Subjects were tested on their ability to distinguish between two sources of test items. In the first phase of the experiments, subjects discriminated between two 6-dimensional data sets represented in sound. In the second phase of the experiment, 75 subjects were selected and assigned to one of three groups. The first group of 25 heard test items, the second group saw test items, and the third group both heard and saw the test items. The average percentage correct was 64.5% for the sound-only group, 62% for the graphics-only group, and 69% for the sound and graphics group. In the third phase, additional experiments focused on the mapping between data values and sound characteristics and on the training methods.

  15. Ocular toxocariasis. A case presentation

    Directory of Open Access Journals (Sweden)

    Mariela Julia Curbelo Gómez

    2008-12-01

    Full Text Available A clinical case on ocular toxocariasis is presented. The clinical manifestations were pain and red eye in a four year-old child. A prior acute uveitis in the LE was found in the physical ocular exam. Vitrea band that was out of the superior edge of papila and a marginal granuloma were found in the eyes fundus. The patient was admitted and treated with oral corticoids and oral antihelmintics

  16. Flat strips. A case presentation.

    Directory of Open Access Journals (Sweden)

    Margarita Espinosa Jiménez

    2003-07-01

    Full Text Available This research paper presents a case of a 12 year old . Give with Angle´s Malocclusion class II, division I, with a 10 mms protuberance and an overpass of complete crown to whom a functional device with plane trail was applied . At 8 months follow up molar relation class I , a 4 mms protuberance and an overpass of the third part of the crown is observed. These results have been assessed as a satisfactory evolution of the patient.

  17. An Atypical Presentation on Insulinoma

    Science.gov (United States)

    2017-06-16

    59th Clinical Research Division may pay for your basic journal publishing charges (to include costs for tables and black and white photos). We cannot...Education (GHSE) (SGS O&M): SGS R&D: Tri-Service Nursing Research Program (TSNRP); Defense Medical Research & Development Program (DMRDP); NIH...accomplished no later than 30 days before final clearance Is required to publish/present your materials. If you have any questions or concerns. please

  18. Fluorescent compounds present in food

    OpenAIRE

    Soto Serrano, Axel

    2014-01-01

    Póster The food industry demands fast, reliable, cheap and reproducible methods for quality and process control. This bibliographic review work investigates florescence spectroscopy, a method that couldn’t be used in food until the recent technological advances, concretely front-face fluorescence and chemometric tools. This technology presents advantages as compared to classical methods like HPLC or capillary electrophoresis, which require qualified staff, sample preparation and are time-c...

  19. Odontogenic fibroma: An unusual presentation

    OpenAIRE

    Armas Jose; Hunter Keith; Jenkins William

    2008-01-01

    The odontogenic fibroma is a relatively rare, slow-growing, benign odontogenic neoplasm of the jaws, with the potential to recur after excision. It may occur either intraosseously or as a localized gingival overgrowth, in which case it may be mistaken for other more common exophytic gingival lesions. This paper reinforces the importance of radiographic and histological examination for exophytic gingival lesions by describing a recurrent peripheral odontogenic fibroma, presenting in 1986, 1992...

  20. Nocardial mycetoma: Diverse clinical presentations

    Directory of Open Access Journals (Sweden)

    Sharma Nand

    2008-01-01

    Full Text Available Nocardia spp are gram-positive, aerobic, acid-fast bacteria which exist as saprophytes in nature. Invasive disseminated infections are particularly common in immunocompromised or debilitated hosts. Superficial infections with Nocardia spp occur as a result of local trauma and contamination of the wound. Clinically, it presents as acute infection (abscesses or cellulitis, mycetoma, or sporotrichoid infection. Differential diagnosis includes eumycetoma, chromomycosis, blastomycosis, coccidioidomycosis, sporotrichosis, tuberculosis, botryomycosis, syphilis, yaws, and neoplasia. Its diagnosis is confirmed by demonstrating the causative organism in exudates (as granules, tissue specimens, or cultures. Early diagnosis will obviate need for drastic surgical measures as early institution of chemotherapy is effective in most patients. However, its diagnosis is often delayed due to diverse clinical presentations and for want of clinical suspicion, particularly in non-endemic areas. This paper presents 4 clinical forms of this not so uncommon disease, emphasizing the importance of high index of clinical suspicion, especially in non-endemic regions; and the significance of repeated examination of exudates for Nocardia granules for an early diagnosis.

  1. Hidden figures are ever present.

    Science.gov (United States)

    Mens, L H; Leeuwenberg, E L

    1988-11-01

    Preference judgments about alternative interpretations of unambiguous patterns can be explained in terms of a rivalry between a preferred and a second-best interpretation (cf. Leeuwenberg & Buffart, 1983). We tested whether this second-best interpretation corresponds to a suppressed but concurrently present interpretation or whether it merely reflects an alternative view that happens to be preferred less often. Two patterns were present immediately following each other with a very short onset asynchrony: a complete pattern and one out of three possible subpatterns of it, corresponding to the best, the second best, or an odd interpretation of the complete pattern. Subjects indicated which subpattern was presented by choosing among the three subpatterns shown after each trial. The scores, corrected for response-bias effects, indicated a relative facilitation of the second-best interpretation, in agreement with its predicted "hidden" presence. This result is more in line with theories that capitalize on the quality of the finally selected representation than with processing models aimed at reaching one single solution as fast and as economically as possible.

  2. Unusual presentation of renal tuberculosis.

    Science.gov (United States)

    Chaudhari, Aunp P; Ranganath, Ravi; Pavan, Malleshappa

    2011-07-01

    Urogenital tuberculosis (TB) is a common late manifestation of an earlier symptomatic or asymptomatic pulmonary TB infection. A latency period ranging from 5 to 40 years between the time of the initial infection and the expression of urogenital TB frequently occurs. As one of the most common sites of involvement of extrapulmonary TB, urogenital TB accounts for 15% to 20% of the infections. We present a patient who had culture-negative active tubercular kidney disease due to silent tuberculous infection. Our case demonstrates the limitations of noninvasive testing in establishing the diagnosis of renal tuberculosis.

  3. Diabetic Myonecrosis: An Atypical Presentation

    Directory of Open Access Journals (Sweden)

    José Hernán Martínez

    2013-01-01

    Full Text Available Diabetic myonecrosis is a frequently unrecognized complication of longstanding and poorly controlled diabetes mellitus. The clinical presentation is swelling, pain, and tenderness of the involved muscle, most commonly the thigh muscles. Management consists of conservative measures including analgesia and rest. Short-term prognosis is good, but long-term prognosis is poor with most patients dying within 5 years. Failure to properly identify this condition will expose the patient to aggressive measures that could result in increased morbidity. To our knowledge this is the first case reported in which there was involvement of multiple muscle groups including upper and lower limbs.

  4. Big Data: present and future

    OpenAIRE

    Mircea Raducu TRIFU; Mihaela Laura IVAN

    2014-01-01

    The paper explains the importance of the Big Data concept, a concept that even now, after years of development, is for the most companies just a cool keyword. The paper also describes the level of the actual big data development and the things it can do, and also the things that can be done in the near future. The paper focuses on explaining to nontechnical and non-database related technical specialists what basically is big data, presents the three most important V's, as well as the new ...

  5. Esthesioneuroblastoma presenting as tooth pain

    Directory of Open Access Journals (Sweden)

    Parvathi Devi

    2014-01-01

    Full Text Available Esthesioneuroblastoma, also called olfactory neuroblastoma, is a rare malignant tumor originating in the olfactory epithelium in the upper nasal cavity with intracranial extension and may also be associated with secondary sinus diseases. Esthesioneuroblastoma has been observed to cause death by distant metastasis or by invasion through the cribriform plate and secondary meningitis. It usually produces nasal obstruction, epistaxis and less commonly anosmia, headache and pain. We report a case of esthesioneuroblastoma in a 50-year-old female who reported with tooth pain as a presenting symptom.

  6. Esthesioneuroblastoma presenting as tooth pain.

    Science.gov (United States)

    Devi, Parvathi; Bhavle, Radhika; Aggarwal, Avanti; Walia, Cherry

    2014-09-01

    Esthesioneuroblastoma, also called olfactory neuroblastoma, is a rare malignant tumor originating in the olfactory epithelium in the upper nasal cavity with intracranial extension and may also be associated with secondary sinus diseases. Esthesioneuroblastoma has been observed to cause death by distant metastasis or by invasion through the cribriform plate and secondary meningitis. It usually produces nasal obstruction, epistaxis and less commonly anosmia, headache and pain. We report a case of esthesioneuroblastoma in a 50-year-old female who reported with tooth pain as a presenting symptom.

  7. Presentation at Innoventure Annual Competition

    Energy Technology Data Exchange (ETDEWEB)

    None

    2010-03-31

    This report documents the components of the workshop presented at the recent annual competition for the Innoventure program. The goal of the workshop was to focus on the delivery of science, technology, engineering, and math (STEM) concepts in a hands-on experiential learning format to increase interest in national security careers at NNSA, most of which are in the STEM fields. This work is a part of the National Security Preparedness Project (NSPP), being performed under a Department of Energy (DOE)/National Nuclear Security Administration (NNSA) grant.

  8. Big Data: present and future

    Directory of Open Access Journals (Sweden)

    Mircea Raducu TRIFU

    2014-05-01

    Full Text Available The paper explains the importance of the Big Data concept, a concept that even now, after years of development, is for the most companies just a cool keyword. The paper also describes the level of the actual big data development and the things it can do, and also the things that can be done in the near future. The paper focuses on explaining to nontechnical and non-database related technical specialists what basically is big data, presents the three most important V's, as well as the new ones, the most important solutions used by companies like Google or Amazon, as well as some interesting perceptions based on this subject.

  9. Vitality of optical vortices (Presentation)

    CSIR Research Space (South Africa)

    Roux, FS

    2014-02-01

    Full Text Available stream_source_info Roux3_2014.pdf.txt stream_content_type text/plain stream_size 3018 Content-Encoding UTF-8 stream_name Roux3_2014.pdf.txt Content-Type text/plain; charset=UTF-8 Title Vitality of optical vortices F Stef... Roux Presented at Complex Light and Optical Force VIII SPIE Photonics West 2014 Moscone Center, San Francisco, California USA 5 February 2014 CSIR National Laser Centre, Pretoria, South Africa – p. 1/11 Speckle Amplitude Phase – p. 2/11 Vortex...

  10. Wafer Replacement Cluster Tool (Presentation);

    Energy Technology Data Exchange (ETDEWEB)

    Branz, H. M.

    2008-04-01

    This presentation on wafer replacement cluster tool discusses: (1) Platform for advanced R and D toward SAI 2015 cost goal--crystal silicon PV at area costs closer to amorphous Si PV, it's 15% efficiency, inexpensive substrate, and moderate temperature processing (<800 C); (2) Why silicon?--industrial and knowledge base, abundant and environmentally benign, market acceptance, and good efficiency; and (3) Why replace wafers?--expensive, high embedded energy content, and uses 50-100 times more silicon than needed.

  11. Cartography past, present and future

    CERN Document Server

    Rhind, DW

    2013-01-01

    Making maps dates back at least four thousand years and it is widely recognised that many maps are of great historical value and present a skilled method of summarising the real world on a sheet of paper. Less well known is the judgement involved in the selection and simplification of features, the complex transformation of space and the exacting standards which are needed in cartography. This book is primarily a tribute to Professor F.J. Ormeling, former President and Secretary/Treasurer of the ICA and gives a wide ranging review of the current status of cartography, how this status was atta

  12. Meningitis, Clinical Presentation of Tetanus

    Science.gov (United States)

    Moniuszko, Anna; Zajkowska, Agata; Tumiel, Ewa; Rutkowski, Krzysztof; Pancewicz, Sławomir; Rutkowski, Ryszard; Zdrodowska, Agnieszka; Zajkowska, Joanna

    2015-01-01

    Background. Tetanus is an acute disease caused by a neurotoxin produced by Clostridium tetani. Tetanus immunization has been available since the late 1930s but sporadic cases still occur, usually in incompletely vaccinated or unvaccinated individuals. Case Report. An elderly previously vaccinated female contracted tetanus following foot injury. Clinically she presented with meningitis causing diagnostic and therapeutic delays. Why Should Physician Be Aware of This? Even in developed countries the differential diagnosis of meningitis, especially in the elderly, should include tetanus. Treatment in intensive care unit is required. General population might benefit from vaccine boosters and education on this potentially fatal disease. PMID:25789186

  13. Session: Test and Evaluation (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Marion, B.; Hanley, C.

    2008-04-01

    The overall goal of this presentation is: (1) provide test and evaluation of PV cells/modules/systems to TPP participants, other PV industry, labs, and universities in support of technology optimization efforts sponsored by DOE's Solar Program and the SAI; (2) support commercial and emerging technology development; (3) provide component and system performance data to improve and validate system performance models; (4) provide T and E support for reliability activities; and (5) priority is placed on TPP's and other solicitations.

  14. Odontogenic fibroma: An unusual presentation

    Directory of Open Access Journals (Sweden)

    Armas Jose

    2008-01-01

    Full Text Available The odontogenic fibroma is a relatively rare, slow-growing, benign odontogenic neoplasm of the jaws, with the potential to recur after excision. It may occur either intraosseously or as a localized gingival overgrowth, in which case it may be mistaken for other more common exophytic gingival lesions. This paper reinforces the importance of radiographic and histological examination for exophytic gingival lesions by describing a recurrent peripheral odontogenic fibroma, presenting in 1986, 1992, and 2003, accompanied on this last occasion by a separate but co-located, central odontogenic fibroma in the underlying alveolar process.

  15. Chinese biobanks: present and future.

    Science.gov (United States)

    Cheng, Le; Shi, Chuan; Wang, Xian; Li, Qiyuan; Wan, Qian; Yan, Zhixiang; Zhang, Yong

    2013-12-01

    As the demands of scientific research and application for specimens increase rapidly, biobanks in China have been springing up over the recent years. This paper summarizes Chinese biobanks through investigation and survey on operative, managerial, ethical conditions and challenges of biobanks. At present, hospitals and research institutes in China set up and operate most of the biobanks, collecting human specimens to support clinical and scientific research. With the development of bio-industry and arrival of the big data era, biobanks need not only collect and store human and non-human specimens but also to manage the big data associated with these specimens.

  16. Meningitis, Clinical Presentation of Tetanus

    Directory of Open Access Journals (Sweden)

    Anna Moniuszko

    2015-01-01

    Full Text Available Background. Tetanus is an acute disease caused by a neurotoxin produced by Clostridium tetani. Tetanus immunization has been available since the late 1930s but sporadic cases still occur, usually in incompletely vaccinated or unvaccinated individuals. Case Report. An elderly previously vaccinated female contracted tetanus following foot injury. Clinically she presented with meningitis causing diagnostic and therapeutic delays. Why Should Physician Be Aware of This? Even in developed countries the differential diagnosis of meningitis, especially in the elderly, should include tetanus. Treatment in intensive care unit is required. General population might benefit from vaccine boosters and education on this potentially fatal disease.

  17. Cutaneous sporotrichosis: Unusual clinical presentations

    Directory of Open Access Journals (Sweden)

    Mahajan Vikram

    2010-01-01

    Full Text Available Three unusual clinical forms of sporotrichosis described in this paper will be a primer for the clinicians for an early diagnosis and treatment, especially in its unusual presentations. Case 1, a 52-year-old man, developed sporotrichosis over pre-existing facial nodulo-ulcerative basal cell carcinoma of seven-year duration, due to its contamination perhaps from topical herbal pastes and lymphocutaneous sporotrichosis over right hand/forearm from facial lesion/herbal paste. Case 2, a 25-year-old woman, presented with disseminated systemic-cutaneous, osteoarticular and possibly pleural (effusion sporotrichosis. There was no laboratory evidence of tuberculosis and treatment with anti-tuberculosis drugs (ATT did not benefit. Both these cases were diagnosed by histopathology/culture of S. schenckii from tissue specimens. Case 3, a 20-year-old girl, had multiple intensely pruritic, nodular lesions over/around left knee of two-year duration. She was diagnosed clinically as a case of prurigo nodularis and histologically as cutaneous tuberculosis, albeit, other laboratory investigations and treatment with ATT did not support the diagnosis. All the three patients responded well to saturated solution of potassium iodide (SSKI therapy. A high clinical suspicion is important in early diagnosis and treatment to prevent chronicity and morbidity in these patients. SSKI is fairly safe and effective when itraconazole is not affordable/ available.

  18. Leptospirosis presenting as honeymoon fever.

    Science.gov (United States)

    de Sainte Marie, B; Delord, M; Dubourg, G; Gautret, P; Parola, P; Brouqui, P; Lagier, J C

    2015-05-01

    An increasing number of travelers from western countries visit tropical regions, questioning western physicians on the prophylaxis, the diagnosis and the therapeutic management of patients with travel-associated infection. In July 2014, a French couple stayed for an adventure-travel in Columbia without malaria prophylaxis. A week after their return the woman presented with fever, myalgia, and retro-orbital pain. Three days later, her husband presented similar symptoms. In both patients, testing for malaria, arboviruses and blood cultures remained negative. An empirical treatment with doxycycline and ceftriaxone was initiated for both patients. Serum collected from the female patient yielded positive IgM for leptospirosis but was negative for her husband. Positive Real-Time PCR were observed in blood and urine from both patients, confirming leptospirosis. Three lessons are noteworthy from this case report. First, after exclusion of malaria, as enteric fever, leptospirosis and rickettsial infection are the most prevalent travel-associated infections, empirical treatment with doxycycline and third generation cephalosporin should be considered. In addition, the diagnosis of leptospirosis requires both serology and PCR performed in both urine and blood samples. Finally, prophylaxis using doxycycline, also effective against leptospirosis, rickettsial infections or travellers' diarrhea should be recommended for adventure travelers in malaria endemic areas.

  19. Teratology - past, present and future.

    Science.gov (United States)

    Ujházy, Eduard; Mach, Mojmír; Navarová, Jana; Brucknerová, Ingrid; Dubovický, Michal

    2012-12-01

    Teratology is the science that studies the causes, mechanisms, and patterns of abnormal development. The authors present an updated overview of the most important milestones and stages of the development of modern teratology. Development of knowledge and society led to the recognition that causes of congenital developmental disorders (CDDs) might be caused by various mechanical effects, foetal diseases, and retarded or arrested development of the embryo and foetus. Based on the analysis of the historical development of hypotheses and theories representing a decisive contribution to this field, we present a survey of the six Wilson's fundamental principles of teratology. The aim of observing these principles is to get insight into developmental relations and to understand mechanisms of action on the level of cell populations (elementary morphogenetic processes), tissues and organs. It is important to realise that any negative intervention into the normal course of these processes, either on genetic or non-genetic basis, inevitably leads to a sequence of subsequent changes resulting in CDDs. Moreover, the classical toxicologic monotonic dose-response paradigm recently has been challenged by the so-called "low dose-hypothesis", particularly in the case of endocrine active substances. These include some pesticides, dioxins, polychlorobiphenyls (PCBs), and bisphenol A. Despite modern approaches of molecular biology and genetics, along with top diagnostic techniques, we are still not able to identify the actual cause in more than 65 to 70% of all congenital defects classified as having an unknown etiology. Today CDDs include any birth defect, either morphological, biochemical, or behavioural.

  20. Clinical presentation of cerebral aneurysms

    Energy Technology Data Exchange (ETDEWEB)

    Cianfoni, Alessandro [Neurocentro della Svizzera Italiana, Ospedale Civico di Lugano, via Tesserete, 46, 6900 Lugano (Switzerland); Pravatà, Emanuele, E-mail: emanuele.pravata@gmail.com [Neurocentro della Svizzera Italiana, Ospedale Civico di Lugano, via Tesserete, 46, 6900 Lugano (Switzerland); De Blasi, Roberto [Neurocentro della Svizzera Italiana, Ospedale Civico di Lugano, via Tesserete, 46, 6900 Lugano (Switzerland); Tschuor, Costa Silvia [Dipartimento di Radiologia, Ospedale Civico di Lugano, via Tesserete, 46, 6900 Lugano (Switzerland); Bonaldi, Giuseppe [U.O. Neuroradiologia, Ospedali Riuniti di Bergamo, Largo Barozzi, 1, 24128 Bergamo (Italy)

    2013-10-01

    Presentation of a cerebral aneurysm can be incidental, discovered at imaging obtained for unrelated causes, can occur in the occasion of imaging obtained for symptoms possibly or likely related to the presence of an unruptured aneurysm, or can occur with signs and symptoms at the time of aneurismal rupture. Most unruptured intracranial aneurysms are thought to be asymptomatic, or present with vague or non-specific symptoms like headache or dizziness. Isolated oculomotor nerve palsies, however, may typically indicate the presence of a posterior circulation aneurysm. Ruptured intracranial aneurysms are by far the most common cause of non-traumatic subarachnoid hemorrhage and represent a neurological emergency with potentially devastating consequences. Subarachnoid hemorrhage may be easily suspected in the presence of sudden and severe headache, vomiting, meningism signs, and/or altered mental status. However, failure to recognize milder and more ambiguous clinical pictures may result in a delayed or missed diagnosis. In this paper we will describe the clinical spectrum of unruptured and ruptured intracranial aneurysms by discussing both typical and uncommon clinical features emerging from the literature review. We will additionally provide the reader with descriptions of the underlying pathophysiologic mechanisms, and main diagnostic pitfalls.

  1. Case presentation – thyroid lymphoma

    Directory of Open Access Journals (Sweden)

    Belkisa Izić

    2011-11-01

    Full Text Available Malignant tumors of the thyroid gland account for about 1% of thenewly diagnosed malignant tumors each year, and their incidence inwomen is twice the incidence in men. According to the WHO classification (2004 thyroid tumors are divided into: carcinoma of the thyroid, adenoma and similar tumors, and other thyroid tumors which include: teratomas, angiosarcomas, paragangliomas and others, as well as primary lymphomas and plasmacytomas. Primary thyroid lymphomasare defined as lymphomas which originate in the thyroid gland. This study presents the case of a 68-year-old patient with a thyroid lymphoma, which caused compression of the airways. In the patientpresented there was reduced activity of the thyroid gland. The dominant symptoms were: breathing difficulties, hoarse voice and the enlargement of the thyroid. An ultrasound examination was performedbefore surgery on the neck, which showed a multinodular thyroid,with compromised and compressed trachea to the right and rear. Anemergency surgical procedure was performed to reduce the tumor.Pathohistological diagnosis confirmed diffuse large B cell lymphoma.The aim of the study was to present a patient with a thyroid lymphoma, who had previously not had any immunological changes to the gland,that is, she had not had any chronic lymphocyte thyroiditis, but due to the compressive syndrome it was necessary to perform an emergencysurgical procedure to reduce the tumor.

  2. Presentation Extensions of the SOAP

    Science.gov (United States)

    Carnright, Robert; Stodden, David; Coggi, John

    2009-01-01

    A set of extensions of the Satellite Orbit Analysis Program (SOAP) enables simultaneous and/or sequential presentation of information from multiple sources. SOAP is used in the aerospace community as a means of collaborative visualization and analysis of data on planned spacecraft missions. The following definitions of terms also describe the display modalities of SOAP as now extended: In SOAP terminology, View signifies an animated three-dimensional (3D) scene, two-dimensional still image, plot of numerical data, or any other visible display derived from a computational simulation or other data source; a) "Viewport" signifies a rectangular portion of a computer-display window containing a view; b) "Palette" signifies a collection of one or more viewports configured for simultaneous (split-screen) display in the same window; c) "Slide" signifies a palette with a beginning and ending time and an animation time step; and d) "Presentation" signifies a prescribed sequence of slides. For example, multiple 3D views from different locations can be crafted for simultaneous display and combined with numerical plots and other representations of data for both qualitative and quantitative analysis. The resulting sets of views can be temporally sequenced to convey visual impressions of a sequence of events for a planned mission.

  3. Atypical presentations of neuromyelitis optica

    Directory of Open Access Journals (Sweden)

    Douglas Sato

    2011-10-01

    Full Text Available Neuromyelitis optica (NMO is an inflammatory disease of central nervous system classically characterized by acute, severe episodes of optic neuritis and longitudinally extensive transverse myelitis, usually with a relapsing course. The identification of an autoantibody exclusively detected in NMO patients against aquaporin-4 (AQP-4 has allowed identification of cases beyond the classical phenotype. Brain lesions, once thought as infrequent, can be observed in NMO patients, but lesions have different characteristics from the ones seen in multiple sclerosis. Additionally, some AQP-4 antibody positive patients may present with a variety of symptoms not being restricted to optic neuritis and acute myelitis during the first attack or in a relapse. Examples are not limited to, but may include patients only with brain and/or brainstem lesions, narcolepsy with hypothalamic lesions or patients with intractable hiccups, nausea and vomiting. The prompt identification of NMO patients with atypical presentations may benefit these patients with institution of early treatment to reduce disability and prevent further attacks.

  4. Nuclear fuels - Present and future

    Science.gov (United States)

    Olander, D.

    2009-06-01

    The important developments in nuclear fuels and their problems are reviewed and compared with the status of present light-water reactor fuels. The limitations of LWR fuels are reviewed with respect to important recent concerns, namely provision of outlet coolant temperatures high enough for use in H 2 production, destruction of plutonium to eliminate proliferation concerns, and burning of the minor actinides to reduce the waste repository heat load and long-term radiation hazard. In addition to current oxide-based fuel rod designs, the hydride fuel with liquid-metal thermal bonding of the fuel-cladding gap is covered. Finally, two of the most promising Generation IV reactor concepts, the very high temperature reactor and the sodium fast reactor, and the accompanying reprocessing technologies, aqueous-based UREX+1a and pyrometallurgical, are summarized. In all of the topics covered, the thermodynamics involved in the fuel's behavior under irradiation and in the reprocessing schemes are emphasized.

  5. Uncommon presentation of pulmonary aspergilloma

    Directory of Open Access Journals (Sweden)

    Baradkar V

    2009-01-01

    Full Text Available Cases of pulmonary aspergilloma without any predisposing factors are rarely reported. Clinical presentation varies from case to case. Here, we report a case of pulmonary aspergilloma in a 60-year-old male patient who was admitted to the Intensive Respiratory Care Unit with spontaneous pneumothorax. The patient had a history of dyspnea on exertion since 9 months and mild haemoptysis since the last 6 months. A computerised tomographic scan of the lungs showed a lesion in the left main bronchus along with obstructive emphysema of the right lung, moderate pneumothorax and mediastinal emphysema. Bronchoscopy was performed and the biopsy samples were processed for histopathological examination and culture on Sabouraud′s dextrose agar, which yielded growth of Aspergillus flavus. Repeat sputum samples also yielded the growth of A. flavus . The patient responded to intravenous liposomaamphotericin B and intercostal drainage.

  6. Diffraction past, present and future

    CERN Document Server

    Predazzi, Enrico

    1998-01-01

    Hadronic diffraction has become a hot and fashionable subject in recent years due to the great interest triggered by the HERA and Tevatron data. These data have helped to put the field in a different perspective paving the road to a hopefully more complete understanding than hitherto achieved. The forthcoming data in the next few years from even higher energies (LHC) promise to sustain this interest for a long time. It is, therefore, necessary to provide the younger generations with as complete as possible discussion of the main developments that have marked the growth of high energy diffractive physics in the past and to assess the present state of the art. For this reason, this part will be by far the largest. The analysis of the relationship between conventional diffractive physics and the low-x physics from deep inelastic scattering will allow us also to review the instruments which could help to understand the developments we can expect from the future.

  7. Multiple Presentations of Brain TB

    Directory of Open Access Journals (Sweden)

    H. Kharazi

    2008-01-01

    Full Text Available Tuberculosis of the central nervous system is an im-portant cause of mortality and morbidity."nPrompt diagnosis and early treatment are extremely important to reduce its morbidity and mortality. The main forms of central nervous system tuberculosis are represented by tuberculosis meningitis, meningeal or parenchymal tuberculomas, and tuberculosis abscess formation. Sequels consist of hydrocephalus, calcifi-cations, and areas of encephalomalacia."nCT is the diagnostic imaging modality in many clini-cal settings to demonstrate the various aspects of cra-nial tuberculosis on initial presentation and to moni-tor the evolution of the disease and response to ther-apy. In this review we illustrate CT scan findings of intracranial lesions of tuberculosis in our patients.

  8. DNA Computer; Present and Future

    Directory of Open Access Journals (Sweden)

    Amir Abbaszadeh Sori

    2014-06-01

    Full Text Available DNA computers use strands of DNA to perform computing operations. The computer consists of two types of strands – the instruction strands and the input data strands. The instruction strands splice together the input data strands to generate the desired output data strand. DNA computing holds out the promise of important and significant connections between computers and living systems, as well as promising massively parallel computations. Before these promises are fulfilled, however, important challenges related to errors and practicality has to be addressed. On the other hand, new directions toward a synthesis of molecular evolution and DNA computing might circumvent the problems that have hindered development, so far. This paper represent present and future DNA computer.

  9. Unusual presentation of spontaneous pneumomediastinum

    Directory of Open Access Journals (Sweden)

    Cho Tae

    2010-01-01

    Full Text Available Spontaneous pneumomediastinum (SPM is an uncommon, self-limiting condition resulting from alveolar rupture in young adults. There are asthma, illicit drug use, and activities triggering a Valsalva maneuver as causes of developing SPM. We report two patients who were diagnosed with SPM in the absence of known predisposing factors and without any clinical sign of subcutaneous emphysema of the neck, the most common physical finding on presentation. Both of them developed dysphagia after swallowing a peach seed and boned rib of pork, respectively. SPM was suspected after performing lateral neck X-ray, and the diagnosis of SPM was confirmed by chest CT. These cases showed the importance of performing the lateral neck X-ray to screen SPM in patients with dysphagia.

  10. Atypical presentations of celiac disease

    Directory of Open Access Journals (Sweden)

    Balasa Adriana Luminita

    2016-08-01

    Full Text Available In this study we evaluated the association of celiac disease in 81 children with autoimmune disease and genetic syndromes over a two years periods (January 2014 to July 2016 in Pediatric Clinic in Constanta. Because the extraintestinal symptoms are an atypical presentation of celiac disease we determined in these children the presence of celiac disease antibodies: Anti-tissue Transglutaminase Antibody IgA and IgA total serum level as a screening method followeds in selective cases by Anti-tissue Transglutaminase Antibody IgG, anti-endomysial antibodies, deamidated gliadin antibodies IgA and IgG and intestinal biopsia. In our study 8 patients had been diagnosed with celiac disease with extraintestinal symptoms, of which 4 with type 1 diabetes, 1 patient with ataxia, 2 patients with dermatitis herpetiformis and 1 patient with Down syndrome that associate also autoimmune thyroiditis, alopecia areata, enamel hypoplasia.

  11. Director general presentation to personnel

    CERN Multimedia

    2016-01-01

    Dear Colleagues, Many important discussions are scheduled for the upcoming Council Week (13-17 June) on topics including the Medium-Term Plan, the Pension Fund and other matters of great relevance to us.   I would therefore like to share the main outcome of the week with you and I invite you to join me and the Directors in the Main Auditorium at 10 a.m. on Thursday 23 June. The meeting will last about one hour and a webcast will also be available. Best regards, Fabiola Gianotti DG presentation to personnel Thursday 23 June at 10 am Main Auditorium Retransmission in Council Chamber, IT Auditorium, Kjell Jonhsen Auditorium, Prevessin 864-1-C02 Webcast on cern.ch/webcast More information on the event page.

  12. Jefferson Lab: Present and Future

    Science.gov (United States)

    Rossi, Patrizia

    2016-08-01

    The continuous electron beam accelerator facility and associated experimental equipment at Jefferson Lab comprise a unique facility for nuclear physics research whose upgrade is presently underway, with completion expected in 2017. The upgraded facility will accelerate electron beams to 11 GeV for experiments in the existing Halls A, B and C. In addition, a 12 GeV beam can be provided to a new experimental hall, Hall D, to generate a 9 GeV tagged photon beam. This upgrade will enable a new experimental program with substantial discovery potential to address important topics in hadronic, nuclear, and electroweak physics. Further in the future, it is envisioned that the Laboratory will evolve into an electron-ion colliding beam facility.

  13. Present and future in lexicography

    Directory of Open Access Journals (Sweden)

    Félix Bugueño Miranda

    2013-08-01

    Full Text Available The purpose of this lecture is to demonstrate the evolution of lexicography from the practical task of compiling dictionaries to their theoretical approach as reference works. The first issue to be discussed is the status of the discipline itself, since there are lexicographers, like Atkins; Rundell (2008, that deny the existence of a lexicographic theory. Secondly, and accepting that a lexicographical theory does exist, we present the main advances in the area, such as the research on dictionary classification, the criteria used to calculate the number of headwords in a dictionary (macrostructure, the set of comments that appear in each entry (microstructure and the system of cross-references (middlestructure. Finally, the lecture will offer a reflection on the normativity in dictionaries.

  14. Intrathoracic Schwannoma Presented with Hemothorax

    Directory of Open Access Journals (Sweden)

    Alkin Yazicioglu

    2016-05-01

    Full Text Available Intrathoracic schwannomas are typically benign and asymptomatic tumors that originate from the Schwann cells of a neural sheath. Hemorrhage from intrathoracic schwannomas is an uncommon finding. We present the case of a 17 year-old girl who had dyspnea and numbness of the right arm. Chest x%u2013ray showed a right-sided massive pleural effusion and exploratory puncture showed hemothorax. After tube thoracostomy and drainage of the bloody effusion, a mass was observed in the right upper hemithorax. Chest tomography revealed a 76x104 mm mass arising from the fourth intercostal nerve. The tumor was successfully resected and, on histopathologic examination it was reported as a schwannoma. After resection, the patient has remained problem-free for fourteen months.

  15. Anal fistula. Past and present.

    Science.gov (United States)

    Zubaidi, Ahmad M

    2014-09-01

    Anal fistula is a common benign condition that typically describes a miscommunication between the anorectum and the perianal skin, which may present de novo, or develop after acute anorectal abscess. Athough anal fistulae are benign, the condition can still negatively influence a patient's quality of life by causing minor pain, social hygienic embarrassment, and in severe cases, frank sepsis. Despite its long history and prevalence, anal fistula management remains one of the most challenging and controversial topics in colorectal surgery today. The end goals of treatment include draining the local infection, eradicating the fistulous tract, and minimizing recurrence and incontinence rates. The goal of this review is to ensure surgeons and physicians are aware of the different imaging and treatment choices available, and to report expected outcomes of the various surgical modalities so they may select the most suitable treatment. 

  16. Neurocysticercosis presenting as pseudobulbar palsy

    Directory of Open Access Journals (Sweden)

    Arinaganahalli Subbanna Praveen Kumar

    2014-01-01

    Full Text Available Neurocysticercosis (NCC is the most common helminthic infestation of the central nervous system (CNS and a leading cause of acquired epilepsy worldwide. The common manifestations of NCC are seizures and headache. The NCC as a cause of pseudobulbar palsy is very unusual and not reported yet in the literature. A pseudobulbar palsy can occur in any disorder that causes bilateral corticobulbar disease. The common etiologies of pseudobulbar palsy are vascular, demyelinative, or motor neuron disease. We report a 38-year-old female patient who presented with partial seizures and pseudobulbar palsy. The MRI brain showed multiple small cysts with scolex in both the cerebral hemispheres and a giant intraparenchymal cyst. Our patient responded well to standard treatment of neurocysticercosis and antiepileptics.

  17. Present challenges in hadrontherapy techniques

    Science.gov (United States)

    Amaldi, U.; Braccini, S.

    2011-07-01

    Hadrontherapy is a high-precision technique in cancer radiation therapy, which allows obtaining a superior conformal treatment with respect to photons used in conventional radiation therapy. To reach this ambitious goal without reducing the patient throughput needed in a hospital-based environment, the physical and radiobiological properties of charged hadrons, protons and carbon ions in particular, have to be exploited at best, making use of the most modern technologies issued from research in nuclear and particle physics. In the present days, we are assisting to a continuous technological challenge, leading to the conception and to the development of innovative methods and instruments. In this paper, the most relevant challenges in dose delivery systems, gantries, imaging, quality assurance and particle accelerators are reviewed.

  18. Unusual Presentation of Dengue Fever

    Science.gov (United States)

    Aslam, Moaz; Aleem, Numra A.; Zahid, Mohammad F.; Rahman, Arshalooz J.

    2016-01-01

    Dengue fever (DF) is an acute febrile illness that follows a self-limiting course. However, some patients suffer from complications, including myocarditis, due to the involvement of other organs. A child presented at the Aga Khan University Hospital in Karachi, Pakistan, in June 2013 with a high-grade fever, malaise and epigastric pain radiating to the chest. Positive DF antigen and immunoglobulin M assays confirmed the diagnosis of DF. Persistent bradycardia with low blood pressure led to further cardiac investigations which showed a decreased ejection fraction and raised serum cardiac enzymes, indicating myocardial damage. With supportive care and use of inotropes, the spontaneous normalisation of cardiac enzyme levels and ejection fraction was observed. The child was discharged five days after admission. This case highlights the importance of identifying myocarditis in DF patients suffering from cardiac symptoms that are not explained by other potential aetiologies. Awareness, early suspicion and supportive care are essential to ensure favourable outcomes. PMID:26909198

  19. Splenic abscess: a rare presentation

    Directory of Open Access Journals (Sweden)

    Mohit Bhatia

    2015-01-01

    Full Text Available Splenic abscess is a rare clinical entity with an incidence of 0.2-0.7% in autopsy-based studies. When untreated, splenic abscess is associated with nearly 100% mortality; in treated patients, the mortality rate is 16.6% during the first 90 days. It mostly occurs in patients with neoplasia, immunodeficiency, trauma, diabetes or splenic infarct. The incidence of splenic abscess is thought to be growing because of the increase in the number of immunocompromised patients who are particularly at risk for this disease and also because of the widespread use of diagnostic modalities. However, the optimal treatment for this remains unclear. We present a case of a 42-year-old man diagnosed with multiloculated splenic abscess and was subjected to splenectomy.

  20. Carbapenems: past, present, and future.

    Science.gov (United States)

    Papp-Wallace, Krisztina M; Endimiani, Andrea; Taracila, Magdalena A; Bonomo, Robert A

    2011-11-01

    In this review, we summarize the current "state of the art" of carbapenem antibiotics and their role in our antimicrobial armamentarium. Among the β-lactams currently available, carbapenems are unique because they are relatively resistant to hydrolysis by most β-lactamases, in some cases act as "slow substrates" or inhibitors of β-lactamases, and still target penicillin binding proteins. This "value-added feature" of inhibiting β-lactamases serves as a major rationale for expansion of this class of β-lactams. We describe the initial discovery and development of the carbapenem family of β-lactams. Of the early carbapenems evaluated, thienamycin demonstrated the greatest antimicrobial activity and became the parent compound for all subsequent carbapenems. To date, more than 80 compounds with mostly improved antimicrobial properties, compared to those of thienamycin, are described in the literature. We also highlight important features of the carbapenems that are presently in clinical use: imipenem-cilastatin, meropenem, ertapenem, doripenem, panipenem-betamipron, and biapenem. In closing, we emphasize some major challenges and urge the medicinal chemist to continue development of these versatile and potent compounds, as they have served us well for more than 3 decades.

  1. [Toxocariasis under the present conditions].

    Science.gov (United States)

    Uspenskiĭ, A V; Peshkov, R A; Gorokhov, V V; Gorokhova, E V

    2011-01-01

    Toxocariasis is today the most widespread zoonotic, helminthic infection in Russia and other countries of the world. A large population of Toxocara has recently inhabited the urban populations of dogs and cats. Therefore toxocariasis canis and toxocariasis cati have shifted from rural areas to cities and megalopolises where Toxocara canis infestation amounts to as much as 100%, without excluding that in the rural populations of dogs. Due to the fact that the number of dogs and cats has considerably increased (20% of adult dogs and 80% of puppies are infected with Toxocara) in our megalopolises, cities, and urban communities as in foreign countries, this substantially increases the risk of toxacariasis. From the above reasoning, environmental contamination with Toxacara eggs creates an important reservoir of infestation for humans and animals (the contamination rates in different regions of Russia ranges from 1-3 to 50-60%, with the infestation rates of 1 - 10 eggs per 100 g of soil). Human toxocariasis is polymorphic, from its subclinical course to significant organ pathology, and detectable as a manifestation of eosinophilia, fever, hepatomegaly, hyperglobulinemia, lung and central nervous system lesions, myocarditis, and skin rash. The diagnosis of toxocariasis is established by its clinical presentation and serological findings. It is important in the history that children have spent much time with dogs or cats.

  2. [Premature newborn: a case presentation].

    Science.gov (United States)

    Pastor Rodríguez, Jesús David; Pastor Bravo, María Del Mar; López García, Visitación; Cotes Teruel, María Isabel; Mellado, Jesús Eulogio; Cárceles, José Jara

    2010-01-01

    A case is presented of a premature newborn of 27 weeks gestation and weighing 420 grams who was delivered as a result of a maternal pre-eclampsia and retarded intra-uterine growth. During the 125 days of hospitalisation, an individual care plan based on the Virginia Henderson model was devised and applied to both the child and her parents using NANDA diagnostics, interventions according to the NIC classification, and the expected results according to the NOC classification. The Marjory Gordon functional patterns were used for the initial assessment. By applying the pre-term newborn (PTNB) plan, all their needs were provided and were modified throughout the hospital stay, with new needs that were added to the established ones. These required a continuous assessment with the subsequent adapting of the care plan. Likewise, the care required by the parents varied from the initial grief due to the possible loss of their child to learning the alarm signs and the home care that their child would need. The child was finally discharged weighing 2900 grams and with normal neurological and psychomotor development, although with a lower weight appropriate to her age. Currently, at 2 years old, the child has a normal neurological and psychomotor development, but with weight and size lower than the P(3) percentile. She requires speech therapy treatment due to paralysis of the right vocal cord.

  3. [ISRAEL NEONATOLOGY: PRESENT AND FUTURE].

    Science.gov (United States)

    Dollberg, Shaul

    2016-01-01

    The practice of neonatology in Israel debuted in the 1970s as local enterprises by individual hospitals that needed to provide sick and preterm newly born infants with up-to-date and effective care. Descriptions of research and advances in humane and gentle treatment during neonatal care for preterm infants and their families, as well as prevention of neonatal infections, follow-up of preterm infants and care of full-term infants are presented in this issue. The Israel National Very Low Birth Weight (VLBW) Infant database provides an excellent source of knowledge, which has led to multiple scientific publications. Recent international comparisons of the outcome of preterm VLBW infants, made possible by this unique database in Israel, has provided the neonatal community and the Ministry of Health with insights as to the differences in prognosis between Israel and other countries, especially among extremely low birth weight infants. At the border of viability, mortality in Israelis significantly higher than that reported in other countries and proactive steps undertaken to examine these differences and prompt correctional action should be pursued. The Israel Ministry of Health started positive initiatives and should ensure that their steps are implemented at the preterm infant's bedside.

  4. Big bang nucleosynthesis: Present status

    Science.gov (United States)

    Cyburt, Richard H.; Fields, Brian D.; Olive, Keith A.; Yeh, Tsung-Han

    2016-01-01

    Big bang nucleosynthesis (BBN) describes the production of the lightest nuclides via a dynamic interplay among the four fundamental forces during the first seconds of cosmic time. A brief overview of the essentials of this physics is given, and new calculations presented of light-element abundances through 6Li and 7Li, with updated nuclear reactions and uncertainties including those in the neutron lifetime. Fits are provided for these results as a function of baryon density and of the number of neutrino flavors Nν. Recent developments are reviewed in BBN, particularly new, precision Planck cosmic microwave background (CMB) measurements that now probe the baryon density, helium content, and the effective number of degrees of freedom Neff. These measurements allow for a tight test of BBN and cosmology using CMB data alone. Our likelihood analysis convolves the 2015 Planck data chains with our BBN output and observational data. Adding astronomical measurements of light elements strengthens the power of BBN. A new determination of the primordial helium abundance is included in our likelihood analysis. New D/H observations are now more precise than the corresponding theoretical predictions and are consistent with the standard model and the Planck baryon density. Moreover, D/H now provides a tight measurement of Nν when combined with the CMB baryon density and provides a 2 σ upper limit Nνpointing to new physics. This paper concludes with a look at future directions including key nuclear reactions, astronomical observations, and theoretical issues.

  5. General presentation including new structure

    Science.gov (United States)

    Soons, A.

    2002-12-01

    Electrical, electronic and electro-mechanical components play an essential role in the functional performance, quality, life cycle and costs of space systems. Their standardisation, product specification, development, evaluation, qualification and procurement must be based on a coherent and efficient approach, paying due attention to present and prospective European space policies and must be commensurate with user needs, market developments and technology trends. The European Space Components Coordination (ESCC) is established with the objective of harmonising the efforts concerning the various aspects of EEE space components by ESA. European national and international public space organisations, the component manufacturers and the user industries. The goal of the ESCC is to improve the availability of strategic EEE space components with the required performance and at affordable costs for institutional and commercial space programmes. It is the objective of ESCC to achieve this goal by harmonising the resources and development efforts for space components in the ESA Member States and by providing a single and unified system for the standardisation, product specification, evaluation, qualification and procurement of European EEE space components and for the certification of components and component manufacturers.

  6. STS-70 Post Flight Presentation

    Science.gov (United States)

    Peterson, Glen (Editor)

    1995-01-01

    In this post-flight overview, the flight crew of the STS-70 mission, Tom Henricks (Cmdr.), Kevin Kregel (Pilot), Major Nancy Currie (MS), Dr. Mary Ellen Weber (MS), and Dr. Don Thomas (MS), discuss their mission and accompanying experiments. Pre-flight, launch, and orbital footage is followed by the in-orbit deployment of the Tracking and Data Relay Satellite (TDRS) and a discussion of the following spaceborne experiments: a microgravity bioreactor experiment to grow 3D body-like tissue; pregnant rat muscular changes in microgravity; embryonic development in microgravity; Shuttle Amateur Radio Experiment (SAREX); terrain surface imagery using the HERCULES camera; and a range of other physiological tests, including an eye and vision test. Views of Earth include: tropical storm Chantal; the Nile River and Red Sea; lightning over Brazil. A three planet view (Earth, Mars, and Venus) was taken right before sunrise. The end footage shows shuttle pre-landing checkout, entry, and landing, along with a slide presentation of the flight.

  7. Augmented reality: past, present, future

    Science.gov (United States)

    Inzerillo, Laura

    2013-03-01

    A great opportunity has permitted to carry out a cultural, historical, architectural and social research with great impact factor on the international cultural interest. We are talking about the realization of a museum whose the main theme is the visit and the discovery of a monument of great prestige: the monumental building the "Steri" in Palermo. The museum is divided into sub themes including the one above all, that has aroused the international interest so much that it has been presented the instance to include the museum in the cultural heritage of UNESCO. It is the realization of a museum path that regards the cells of the Inquisition, which are located just inside of some buildings of the monumental building. The project, as a whole, is faced, in a total view, between the various competences implicated: historic, chemic, architectonic, topographic, drawing, representation, virtual communication, informatics. The birth of the museum will be a sum of the results of all these disciplines involved. Methodology, implementation, fruition, virtual museum, goals, 2D graphic restitution, effects on the cultural heritage and landscape environmental, augmented reality, Surveying 2D and 3D, hi-touch screen, Photogrammetric survey, Photographic survey, representation, drawing 3D and more than this has been dealt with this research.

  8. Nuclear Fuels: Present and Future

    Directory of Open Access Journals (Sweden)

    Donald R. Olander

    2009-02-01

    Full Text Available The important new developments in nuclear fuels and their problems are reviewed and compared with the status of present light-water reactor fuels. The limitations of these fuels and the reactors they power are reviewed with respect to important recent concerns, namely provision of outlet coolant temperatures high enough for use in H2 production, destruction of plutonium to eliminate proliferation concerns, and burning of the minor actinides to reduce the waste repository heat load and long-term radiation hazard. In addition to current oxide-based fuel-rod designs, the hydride fuel with liquid metal thermal bonding of the fuel-cladding gap is covered. Finally, two of the most promising Generation IV reactor concepts, the Very High Temperature Reactor and the Sodium Fast Reactor, and the accompanying reprocessing technologies, aqueous-based UREX and pyrometallurgical, are summarized. In all of the topics covered, the thermodynamics involved in the material's behavior under irradiation and in the reprocessing schemes are emphasized.

  9. Pemphigus Vulgaris Presented with Cheilitis

    Directory of Open Access Journals (Sweden)

    Zaheer Abbas

    2014-01-01

    Full Text Available Background. Pemphigus vulgaris is an autoimmune blistering disease affecting the mucous membrane and skin. In 50 to 70% of cases, the initial manifestations of pemphigus vulgaris are oral lesions which may be followed by skin lesions. But it is unusual for the disease to present with initial and solitary persistent lower lip lesions without progression to any other location. Main Observations. We report a 41-year-old woman with dry crusted lesions only on the lower lip, clinically resembling actinic cheilitis and erosive lichen planus, but histopathological evaluation showed unexpected results of suprabasal acantholysis and cleft compatible with pemphigus vulgaris. We treated her with intralesional triamcinolone 10 mg/mL for 2 sessions and 2 g cellcept daily. Patient showed excellent response and lesions resolved completely within 2 months. In one-year follow-up, there was no evidence of relapse or any additional lesion on the other sites. Conclusion. Cheilitis may be the initial and sole manifestation of pemphigus vulgaris. Localized and solitary lesions of pemphigus vulgaris can be treated and controlled without systemic corticosteroids.

  10. A cool present for LEIR

    CERN Multimedia

    2005-01-01

    LEIR (Low Energy Ion Ring), which will supply lead ions to the LHC experiments, has taken delivery of one of its key components, its electron cooling system. From left to right, Gérard Tranquille, Virginia Prieto and Roland Sautier, in charge of the electron cooling system for LEIR at CERN, and Christian Lacroix, in charge of installation for the LEIR machine. On 16 December, the day before CERN's annual closure, the LEIR teams received a rather impressive Christmas present. The "parcel" from Russia, measuring 7 metres in length and 4 metres in height, weighed no less than 20 tonnes! The component will, in fact, be one of the key elements of the future LEIR, namely its electron cooling system. LEIR is one of the links in the injector chain that will supply lead ions to the LHC experiments, in particular ALICE (see Bulletin No. 28/2004 of 5 July 2004), within the framework of the I-LHC Project. The electron cooling system is designed to reduce and standardise transverse ion velocity. This focuses the bea...

  11. Driven optical matter (Conference Presentation)

    Science.gov (United States)

    Figliozzi, Patrick; Sule, Nishant; Yan, Zijie; Vaikuntanathan, Suriyanarayanan; Rice, Stuart A.; Scherer, Norbert F.

    2016-09-01

    Optical trapping has enabled studying a wide variety of questions and systems in chemistry, biology, physics, and materials science. For example, optical trapping has been used to understand hydrodynamic interactions in dilute and dense colloidal fluids and discover connections to granular materials. In this presentation we show that shaped optical fields and gradients can be used to study the electrodynamic interactions amongst nanoparticles (NPs) and drive them into new ordered states. We demonstrate the formation and use of NP-based optical matter to study a range of nonequilibrium phenomena in solution; field-driven barrier crossing phenomena and noise-driven ordering. Optical matter, a material that forms only in the presence of an optical field, involves NP interactions by optical scattering and interference. Metal NPs can be formed into regular arrangements in minimally shaped fields; e.g., in focused Gaussian beams, line traps, and optical ring traps. Inter-particle interactions and motions are also affected when the optical matter is driven. Particles recirculate in an optical ring vortex trap allowing long term measurements to examine rare events. In particular, particles can hop between optical binding sites, move past electrodynamic obstacles or pass each other while moving around the ring. The polarization state of the optical beam can be used to produce periodic variations of the NP electrodynamic interactions. As particles circulate this "noise" causes NP clusters to be less stable as if the temperature of the system is increased. Conversely, we observe noise-driven ordering in dense systems. We will explain these phenomena using simulations and theory.

  12. A Presentation of Spectacular Visualizations

    Science.gov (United States)

    Hasler, Fritz; Einaudi, Franco (Technical Monitor)

    2000-01-01

    The NASA/NOAA/AMS Earth Science Electronic Theater presents Earth science observations and visualizations in a historical perspective. Fly in from outer space to Florida and the KSC Visitor's Center. Go back to the early weather satellite images from the 1960s see them contrasted with the latest International global satellite weather movies including killer hurricanes and tornadic thunderstorms. See the latest spectacular images from NASA and the National Oceanic and Atmospheric Administration (NOAA) remote sensing missions like the Geostationary Operational Environmental Satellites (GOES), NOAA, Tropical Rainfall Measuring Mission (TRMM), SeaWiFS, Landsat7, and new Terra which will be visualized with state-of-the art tools. Shown in High Definition TV resolution (2048 x 768 pixels) are visualizations of hurricanes Lenny, Floyd, Georges, Mitch, Fran, and Linda. See visualizations featured on covers of magazines like Newsweek, TIME, National Geographic, Popular Science, and on National and International Network TV. New Digital Earth visualization tools allow us to roam and zoom through massive global images including a Landsat tour of the US, with drill-downs into major cities using one meter resolution spy-satellite technology from the Space Imaging IKONOS satellite. Spectacular new visualizations of the global atmosphere and oceans are shown. See massive dust storms sweeping across Africa. See ocean vortexes and currents that bring up the nutrients to feed tiny plankton and draw the fish, giant whales and fisherman. See the how the ocean blooms in response to these currents and El Nino/La Nina climate changes. The demonstration is interactively driven by a SGI Octane Graphics Supercomputer with dual CPUs, 5 Gigabytes of RAM and Terabyte disk using two projectors across the super sized Universe Theater panoramic screen.

  13. A Presentation of Spectracular Visualizations

    Science.gov (United States)

    Hasler, Fritz; Pierce, Hal; Einaudi, Franco (Technical Monitor)

    2000-01-01

    The NASA/NOAA/AMS Earth Science Electronic Theater presents Earth science observations and visualizations in a historical perspective. Fly in from outer space to Florida and the KSC Visitor's Center. Go back to the early weather satellite images from the 1960s see them contrasted with the latest International global satellite weather movies including killer hurricanes & tornadic thunderstorms. See the latest spectacular images from NASA and NOAA remote sensing missions like GOES, NOAA, TRMM, SeaWiFS, Landsat7, & new Terra which will be visualized with state-of-the art tools. Shown in High Definition TV resolution (2048 x 768 pixels) are visualizations of hurricanes Lenny, Floyd, Georges, Mitch, Fran and Linda. See visualizations featured on covers of magazines like Newsweek, TIME, National Geographic, Popular Science and on National & International Network TV. New Digital Earth visualization tools allow us to roam & zoom through massive global images including a Landsat tour of the US, with drill-downs into major cities using I m resolution spy-satellite technology from the Space Imaging IKONOS satellite. Spectacular new visualizations of the global atmosphere & oceans are shown. See massive dust storms sweeping across Africa. See ocean vortexes and currents that bring up the nutrients to feed tiny plankton and draw the fish, giant whales and fisherman. See the how the ocean blooms in response to these currents and El Nino/La Nina climate changes. The demonstration is interactively driven by a SGI Octane Graphics Supercomputer with dual CPUs, 5 Gigabytes of RAM and Terabyte disk using two projectors across the super sized Universe Theater panoramic screen.

  14. Medical informatics: past, present, future.

    Science.gov (United States)

    Haux, Reinhold

    2010-09-01

    To reflect about medical informatics as a discipline. To suggest significant future research directions with the purpose of stimulating further discussion. Exploring and discussing important developments in medical informatics from the past and in the present by way of examples. Reflecting on the role of IMIA, the International Medical Informatics Association, in influencing the discipline. Medical informatics as a discipline is still young. Today, as a cross-sectional discipline, it forms one of the bases for medicine and health care. As a consequence considerable responsibility rests on medical informatics for improving the health of people, through its contributions to high-quality, efficient health care and to innovative research in biomedicine and related health and computer sciences. Current major research fields can be grouped according to the organization, application, and evaluation of health information systems, to medical knowledge representation, and to the underlying signal and data analyses and interpretations. Yet, given the fluid nature of many of the driving forces behind progress in information processing methods and their technologies, progress in medicine and health care, and the rapidly changing needs, requirements and expectations of human societies, we can expect many changes in future medical informatics research. Future research fields might range from seamless interactivity with automated data capture and storage, via informatics diagnostics and therapeutics, to living labs with data analysis methodology, involving sensor-enhanced ambient environments. The role of IMIA, the International Medical Informatics Association, for building a cooperative, strongly connected, and research-driven medical informatics community worldwide can hardly be underestimated. Health care continuously changes as the underlying science and practice of health are in continuous transformation. Medical informatics as a discipline is strongly affected by these

  15. Como responder ao momento presente?

    Directory of Open Access Journals (Sweden)

    Maria Filomena Molder

    2013-12-01

    Full Text Available http://dx.doi.org/10.5007/1984-784X.2013v13n19p13 Foi com esta pergunta — já um efeito de um primeiro encontro entre Irene Pimentel e eu própria — que decidimos desafiar colegas, estudantes e funci­onários da nossa Faculdade, FCSH (Faculdade de Ciências Sociais e Huma­nas, de outras Faculdades da Universidade Nova de Lisboa, de outras Uni­versidades e todos os interessados em con­siderar e discutir em comum aquilo que se passava em Portugal e que no anúncio da Jornada de 6 de De­zembro de 2012 se descrevia como um “processo de desmantela­mento social, económico e cultural sem precedentes — pese embora tantas compara­ções, baseadas na premissa da ‘eterna repetição’ — e cujas consequências não param de exceder as previsões dos responsáveis por esse desmantelamento”. Acedendo com todo o empenho e gratidão ao convite que me foi dirigido por Humberto Brito para fazer uma resenha da Jornada a publicar no primeiro número de Forma de Vida (saúdo a revista e o título, decidi-me, no entanto, a pôr de lado a resenha, que sob a forma de “Editorial” será em breve publi­cada no blogue Responder ao Momento Presente, entre­tanto criado, conjuntamente com os textos escritos pelos nossos convidados, com as parti­cipações de pessoas que corresponderam ao nosso apelo e ainda com contri­bui­ções que se alargaram para lá da Jornada; a que se juntará uma gravação em video, também disponível no Youtube.   Texto publicado originalmente em Forma de Vida, Lisboa, n.1, fev. 2013. Agrade­cemos à autora por permitir a republicação neste número do Boletim. [N.E.

  16. Como responder ao momento presente?

    Directory of Open Access Journals (Sweden)

    Maria Filomena Molder

    2013-06-01

    Full Text Available Foi com esta pergunta — já um efeito de um primeiro encontro entre Irene Pimentel e eu própria — que decidimos desafiar colegas, estudantes e funci­onários da nossa Faculdade, FCSH (Faculdade de Ciências Sociais e Huma­nas, de outras Faculdades da Universidade Nova de Lisboa, de outras Uni­versidades e todos os interessados em con­siderar e discutir em comum aquilo que se passava em Portugal e que no anúncio da Jornada de 6 de De­zembro de 2012 se descrevia como um “processo de desmantela­mento social, económico e cultural sem precedentes — pese embora tantas compara­ções, baseadas na premissa da ‘eterna repetição’ — e cujas consequências não param de exceder as previsões dos responsáveis por esse desmantelamento”. Acedendo com todo o empenho e gratidão ao convite que me foi dirigido por Humberto Brito para fazer uma resenha da Jornada a publicar no primeiro número de Forma de Vida (saúdo a revista e o título, decidi-me, no entanto, a pôr de lado a resenha, que sob a forma de “Editorial” será em breve publi­cada no blogue Responder ao Momento Presente, entre­tanto criado, conjuntamente com os textos escritos pelos nossos convidados, com as parti­cipações de pessoas que corresponderam ao nosso apelo e ainda com contri­bui­ções que se alargaram para lá da Jornada; a que se juntará uma gravação em video, também disponível no Youtube. Texto publicado originalmente em Forma de Vida, Lisboa, n.1, fev. 2013. Agrade­cemos à autora por permitir a republicação neste número do Boletim. [N.E.

  17. Past and present Aral Sea

    Science.gov (United States)

    Dukhovniy, Viktor; Stulina, Galina; Eshchanov, Odylbek

    2013-04-01

    The tragedy of disappearing of Aral Sea is well known to the World. Before and after collapse of Soviet Union, a huge quantity of scientific and popular editions described with grief the situation around the Aral Sea. After the NIS states became independent, World Bank, UNDP, UNEP in proper competition with each other had provided some assessment of the situation through presentation of some small and medium grants, but after 2000, the local population remained alone with own problems. Although on the eyes of the present generation a unique transformation of great water body into deserts took place, the global scientific community did not find forces and financing for real and detail investigation of the processes accompanying the Sea shrinking and land formation. We should acknowledge and give big respect to NATO, later to German Government that through GTZ (now GIZ) - German International Collaboration Agency - and GFZ (Potzdam) paid attention to this area of environment crisis and organized scientific and protective design in the so-called Priaralie - the territory around the drying Sea and delta of the two rivers - Amudarya and Syrdarya. Thank to this assistance, the local specialists in collaboration with limited a number of foreign scientists (N.Aladin, P.Zavialov, Joop de Schutter, Hans Wilps, Hedi Oberhansli) organized significant works for detail socioeconomic, ecological and hydrological assessment situation in Priaralie and on the Aral sea coast. On this base, Ministry of Agriculture and Water resources of Uzbekistan and State Committee of Water resources of Kazakhstan developed a plan of rehabilitation of Amudarya and Syrdarya deltas and started implementation of these projects. If Kazakh water authority moved ahead in wetland restoration faster, a forestation of delta and drying bed of Aral Sea got big success in Uzbek territory. 244 thousands hectares of saxsaul and tamarix were planted for protection of the Priaralie. By request of GTZ SIC, ICWC

  18. De l’huile de foie de morue aux huiles de poisson concentrées, riches en acides gras polyinsaturés

    National Research Council Canada - National Science Library

    Grosdemange Anne-Gaëlle

    2010-01-01

    .... The lipochemistry allows to concentrate the natural content of omega 3: esterification then concentration by molecular distillation or CO2 supercritical plus transesterification (chemical/enzymatic) for TG form. Possibility of fish oil process is “unlimited” to offer to the market the benefice of omega 3 with safe, traceable, tasty fish oils.

  19. Thermal stability of the aromatic fraction of Safaniya crude oil (Middle East): experimental study, kinetic scheme by molecular classes and geochemical implications; Stabilite thermique de la fraction aromatique de l'huile brute safaniya (Moyen-Orient): etude experimentale, schema cinetique par classes moleculaires et implications geochimiques

    Energy Technology Data Exchange (ETDEWEB)

    Al Darouich, T.

    2005-07-15

    The thermal evolution of reservoir oils is controlled by the kinetics of cracking reactions. The present work is concerned with the study of the thermal stability of the light aromatic components (C{sub 6}-C{sub 14}) of crude oils under geological conditions. The aim is to predict this stability through a mode l derived from laboratory pyrolyses. The light cut < 250 deg. C of Safaniya crude oil, corresponding to the C{sub 15} components, was obtained by fractionated distillation; pure aromatic fraction was then separated by liquid chromatography. Detailed molecular characterisation of the aromatic fraction was acquired using HPLC, GC and GC/MS. Then, quantified individual aromatic compounds were lumped into six molecular classes: BTXN, methyl-aromatics, alkyl-aromatics, naphthenic-aromatics, indene and sulphur - containing aromatics. Pyrolyses of the aromatic fraction were performed in gold tubes at 100 bars and different temperature/time conditions in a wide range (1 to 93%) of global conversion. Pyrolysis effluents were analysed and lumped into classes. The pyrolysis data were used to elaborate a semi - empirical kinetic scheme of 13 stoichiometric reactions for the primary and secondary cracking of the unstable classes. The scheme kinetic parameters were first estimated, and then numerically optimised, with the constraints of mass balance and hydrogen conservation. A set of pyrolysis experiments was performed at 375 deg.C under high pressures: 400, 800 and 1200 bars. Increasing slowing down in conversion rate with increasing pressure was thus observed compared to experiments at 100 bars. A slight selective effect of pressure on the different aromatic classes of the charge and on the product distribution was evidenced. The extrapolation of the kinetic model to the conditions of Elgin Field (North Sea) showed that pressure effect should shift the thermal cracking of light aromatics to higher temperatures by almost 8 deg. C. (author)

  20. Presentation of Database on Aims and Visions

    DEFF Research Database (Denmark)

    Lundgaard, Jacob

    2005-01-01

    This presentation presents a database on aims and visions regarding regional development and transport and infrastructure in the corridor from Oslo-Göteborg-Copenhagen-Berlin. The process, the developed methodology as well as the result of the database is presented.......This presentation presents a database on aims and visions regarding regional development and transport and infrastructure in the corridor from Oslo-Göteborg-Copenhagen-Berlin. The process, the developed methodology as well as the result of the database is presented....

  1. Experimental study and mechanical modelling of the effects of water-driving in an oil saturated chalk. Application to the petroleum industry; Etude experimentale et modelisation mecanique des effets du balayage a l'eau dans une craie saturee d'huile. Application a l'industrie petroliere

    Energy Technology Data Exchange (ETDEWEB)

    Mata, C.

    2001-01-01

    measurements and SEM observation, let us highlight two different contributions to mechanical strength of chalk-: 1) The cohesion due to solid micro-bridges between calcite grains (always present in intact samples); 2) The cohesion due to water capillary menisci (which decreases when the degree of water saturation increases). On these grounds, an elasto-plastic model is proposed is order to explain how contributions are coupled. In this modelling, plastic strain is an hardening parameter while water saturation ratio is a softening one. Applications are developed in order to relate water-driving, stress state and subsidence rate in an oil reservoir configuration. (author)

  2. 36 CFR 251.97 - Oral presentation.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 2 2010-07-01 2010-07-01 false Oral presentation. 251.97... presentation. (a) Purpose. An oral presentation provides an additional opportunity for an appellant, and other..., emphasize, and/or clarify information related to an appeal. Oral presentations are to be conducted in...

  3. Unusual Presentation of Multibacillary Nodular Leprosy

    Science.gov (United States)

    Raut, Shweta; Kanade, Swapna; Nataraj, Gita; Mehta, Preeti

    2017-01-01

    Despite India achieving the goal of elimination of leprosy as a public health problem, leprosy is still being transmitted in India. However, due to decreased clinical suspicion of leprosy and atypical case presentations, such cases may be not be diagnosed. We present a case report of an unusual presentation of multibacillary leprosy which presented as nodular lesions. This case report indicates that atypical presentations of leprosy may be missed out by primary care physicians. PMID:28042219

  4. Ten steps to successful poster presentation.

    Science.gov (United States)

    Hardicre, Jayne; Devitt, Patric; Coad, Jane

    Receiving a letter confirming acceptance for you to present a poster at a conference can evoke mixed emotions. Joy, panic, fear and dread are among the many possible emotions and this is not exclusive to first time presenters. Developing an effective poster presentation is a skill that you can learn and can provide a rewarding way to present your work in a manner less intimidating than oral presentation (Shelledy, 2004). The key to successful poster presentation is meticulous, timely, well informed preparation. This article outlines ten steps to help guide you through the process to maximize your success.

  5. Neonatal intrathoracic neuroblastoma: unusual presentation with haemothorax

    Directory of Open Access Journals (Sweden)

    Joana Jardim

    2015-03-01

    Full Text Available Thoracic neuroblastomas are rare in the neonatal period. They may be asymptomatic or cause respiratory distress. Congenital haemothorax present at birth, as the result of intravascular disseminated coagulopathy, is an uncommon initial presentation of intrathoracic neuroblastomas.

  6. 2016 Annual Technology Baseline (ATB) - Webinar Presentation

    Energy Technology Data Exchange (ETDEWEB)

    Cole, Wesley; Kurup, Parthiv; Hand, Maureen; Feldman, David; Sigrin, Benjamin; Lantz, Eric; Stehly, Tyler; Augustine, Chad; Turchi, Craig; Porro, Gian; O' Connor, Patrick; Waldoch, Connor

    2016-09-13

    This deck was presented for the 2016 Annual Technology Baseline Webinar. The presentation describes the Annual Technology Baseline, which is a compilation of current and future cost and performance data for electricity generation technologies.

  7. Seminoma in the testis presenting as hemospermia

    DEFF Research Database (Denmark)

    Beji, Sami; Hoejgaard, Martin; Lyngdorf, Peter

    2012-01-01

    Hemospermia is often considered idiopathic. We report a case of a patient who presented with hemospermia. Scrotal examination and ultrasonography found a testis tumor. This case underscores the importance of scrotal examination and eventually ultrasound in patients presenting with hemospermia....

  8. Redundant Information Presentation in Hypertext Learning Environments

    NARCIS (Netherlands)

    Bezdan, Eniko; Kester, Liesbeth; Kirschner, Paul A.

    2011-01-01

    Bezdan, E., Kester, L., & Kirschner, P. A. (2011, 29 August). Redundant Information Presentation in Hypertext Learning Environments. Presentation at the pre-conference of the Junior Researchers of EARLI, Exeter, United Kingdom.

  9. Seamless presentation capture, indexing, and management

    Science.gov (United States)

    Hilbert, David M.; Cooper, Matthew; Denoue, Laurent; Adcock, John; Billsus, Daniel

    2005-10-01

    Technology abounds for capturing presentations. However, no simple solution exists that is completely automatic. ProjectorBox is a "zero user interaction" appliance that automatically captures, indexes, and manages presentation multimedia. It operates continuously to record the RGB information sent from presentation devices, such as a presenter's laptop, to display devices, such as a projector. It seamlessly captures high-resolution slide images, text and audio. It requires no operator, specialized software, or changes to current presentation practice. Automatic media analysis is used to detect presentation content and segment presentations. The analysis substantially enhances the web-based user interface for browsing, searching, and exporting captured presentations. ProjectorBox has been in use for over a year in our corporate conference room, and has been deployed in two universities. Our goal is to develop automatic capture services that address both corporate and educational needs.

  10. Demographics and presenting clinical features of childhood ...

    African Journals Online (AJOL)

    Demographics and presenting clinical features of childhood systemic lupus ... and characteristics of children with systemic lupus erythematosus (SLE). ... Rashes were found to be the commonest clinical feature present at the time of diagnosis, ...

  11. Dengue fever presenting as acute acalculus cholecystitis.

    Science.gov (United States)

    Joshipura, Vismit P; Soni, Harshad N; Patel, Nitin R; Haribhakti, Sanjiv P

    2007-06-01

    Classically dengue fever presents as fever with myalgia. A patient of dengue fever presented with classical symptoms and signs of acute acalculous cholecystitis. Serology and ultrasound examination identified dengue as the aetiology. Patient was treated successfully by conservative measures.

  12. Acute myeloid leukemia presenting as galactorrhea

    Science.gov (United States)

    Nambiar, K. Rakul; Devi, R. Nandini

    2016-01-01

    Acute myeloid leukemia (AML) presents with symptoms related to pancytopenia (weakness, infections, bleeding diathesis) and organ infiltration with leukemic cells. Galactorrhea is an uncommon manifestation of AML. We report a case of AML presenting with galactorrhea. PMID:27695173

  13. Acute myeloid leukemia presenting as galactorrhea

    OpenAIRE

    Nambiar, K. Rakul; Nair, Sreejith G.; Devi, R. Nandini

    2016-01-01

    Acute myeloid leukemia (AML) presents with symptoms related to pancytopenia (weakness, infections, bleeding diathesis) and organ infiltration with leukemic cells. Galactorrhea is an uncommon manifestation of AML. We report a case of AML presenting with galactorrhea.

  14. Presentation skills for the nurse educator.

    Science.gov (United States)

    Longo, Anne; Tierney, Carol

    2012-01-01

    With the increase in interdisciplinary bedside rounds, shared governance, and other leadership opportunities, nurses find themselves in positions requiring the creation and delivery of oral presentations. This is not a skill that comes naturally to most nurses and is often noted as the one leadership skill that causes the most personal discomfort. Today educators are in a position to coach inexperienced staff in developing their presentation skills. This article presents recommendations for designing and delivering winning presentations.

  15. Reflections: Improving Medical Students' Presentation Skills.

    Science.gov (United States)

    Tarkowski, Radoslaw

    2016-02-26

    Both good communication and presentation skills on the part of an academic teacher are crucial when trying to generate students' interest in the subject of a lecture. More generally, our task is to share knowledge in the most effective way possible. It is also worth teaching students presentation skills, as today's students are tomorrow's teachers. An engaging presentation is a powerful tool. There are some rules for presenting which I consider worthy of being discussed and taught at a medical university.

  16. The Design Space of Information Presentation

    DEFF Research Database (Denmark)

    May, Michael; Petersen, Johannes

    2007-01-01

    (adaptive, tailorable) presentations with a clear separation between (a) the content forms of data, (b) the representational forms through which data is expressed, (c) the combination of media of presentation, and (d) the specific layout within the constraints of the presentation devices and the ergonomic...

  17. The Design Space of Information Presentation

    DEFF Research Database (Denmark)

    May, Michael; Petersen, Johannes

    2007-01-01

    A semiotic approach to the design space of information presentation is presented in which Formal Concept Analysis (FCA) is used to represent and explore attributes of abstract sign types and the media (graphical, haptic, acoustic, gestic) through which they are presented as specific...

  18. Sporotrichoid lupus vulgaris: A rare presentation.

    Science.gov (United States)

    Maheshwari, Anshul; Tiwari, Siddhi; Mathur, Deepak K; Bhargava, Puneet

    2015-01-01

    Lupus vulgaris is the most common presentation of cutaneous tuberculosis in India and can present as papular, nodular, plaque, ulcerative, vegetating, and tumid forms. Unusual variants include the frambesiform, gangrenous, ulcerovegetating, lichen simplex chronicus, myxomatous, and sporotrichoid types. We describe a rare sporotrichoid presentation of lupus vulgaris on the leg of a 28-year-old female of 12 years duration.

  19. Pulmonary mucormycosis presenting with vocal cord paralysis

    OpenAIRE

    Gayathri Devi, H. J.; Mohan Rao, K.N.; K M Prathima; Moideen, Riyaz

    2013-01-01

    Pulmonary mucormycosis is a relatively uncommon infection. It can present in various forms. Very few cases of pulmonary mucormycosis presenting as vocal cord paralysis have been described in the literature. We report a case of pulmonary mucormycosis presenting as vocal cord paralysis in an uncontrolled diabetic patient.

  20. Do You Like Sending Presents Between Frends?

    Institute of Scientific and Technical Information of China (English)

    王秋元; 林达; Roy; 田田; Jenny

    2007-01-01

    王秋元Yes, I do. I think it is very important. When I get a present from a friend, I feel happy because it means that he or she cares about me. Different presents have different meanings. It doesn’t have to be expensive. It is important because it carries love. Do not forget to send presents to your friends.

  1. 7 CFR 2901.3 - Oral presentation.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 15 2010-01-01 2010-01-01 false Oral presentation. 2901.3 Section 2901.3 Agriculture... presentation. Any person seeking an adjustment under this part 2901 shall be given an opportunity to make an oral presentation of data, views and arguments in support of the request for an adjustment,...

  2. 6th International Immunoglobulin Symposium: Poster presentations

    NARCIS (Netherlands)

    Fernandez-Cruz, E.; Kaveri, S.V.; Peter, H.H.; Durandy, A.; Cantoni, N.; Quinti, I.; Sorensen, R.; Bussel, J.B.; Danieli, M.G.; Winkelmann, A.; Bayry, J.; Kaesermann, F.; Spaeth, P.; Helbert, M.; Salama, A.; van Schaik, I.N.; Yuki, N.

    2009-01-01

    P>The posters presented at the 6th International Immunoglobulin Symposium covered a wide range of fields and included both basic science and clinical research. From the abstracts accepted for poster presentation, 12 abstracts were selected for oral presentations in three parallel sessions on immunod

  3. Intuitionistic Assessment Of Behavioural Present Value*

    Directory of Open Access Journals (Sweden)

    Piasecki Krzysztof

    2014-07-01

    Full Text Available The article discussesd the impact of chosen behavioural factors on the imprecision of present value assessment. The formal model of behavioural present value is offered as a result of this discussion. The behavioural present value is described here as an intuitionistic fuzzy set. The significance of the replacement of a fuzzy set by an intuitionistic fuzzy set is proved.

  4. Analyse de la reponse dielectrique du complexe papier-huile dans les transformateurs de puissance

    Science.gov (United States)

    Provencher, Helene

    Life span of high power transformers is dependent on the life span of their solid insulation, internal windings paper. Non-destructive testing methods of the insulation have been developed in recent years including the dielectric measurement method. Studies have shown that dielectric measurements are function of humidity, temperature and the degree of aging of the transformers paper/oil insulation. The objective of this study is to separate the contribution of the aging of the paper from the contributions of others factors such as humidity and oil aging. The oil/paper insulation measurements demonstrated that humidity can be isolated from aging in the presence of low percentage of humidity in the paper. The measurements of winding samples showed that there is no correlation between dielectric measurements and the degree of polymerisation, which is depending on the degree of aging of the paper. The measurement variations were due to the oil aging. Keywords: cellulose, paper, aging, temperature, geometry, humidity, transformer, dielectric response, oil.

  5. Caractérisation du marché des huiles de karité en Centrafrique

    Directory of Open Access Journals (Sweden)

    Mbétid-Bessane, E.

    2005-01-01

    Full Text Available Market Characterization of Shea Oil in Central African Republic. The goal of this study is to characterize the market functionning of shea oil and to assess the financial profitability of the activities of various actors of this market. From a sample of 120 actors, drawn at random in the Bossangoa region and the main markets of Bangui, the study results show that the shea is a tree with multiple uses which main product is the shea oil. The women are the main actors of this market: they collect the shea nuts that they transform into oil and they ensure the distribution of more than 80% of the production and remain the major consumers. Unfortunately, its commercialization is not organized, which increases its price and thus limits its consumption in urban centers. Nevertheless, the activities of collect, transformation and commercialization of shea oil are profitable for the actors. An improvement of production processes and market functioning would strengthen this result and would more increase the actor income and the consumption.

  6. Enrichissement nutritionnel de l'huile d'olive : entre tradition et innovation

    OpenAIRE

    Veillet, Sébastien

    2010-01-01

    Olive oil is an ancestral product widely known for its benefic effects on human health. Its processing has changed a lot through centuries, especially these past few years with the increasing automation of the production lines. The first part of this manuscript describes these evolutions while the second part gives details on the influence of each processing step on the nutritional composition of the olive oil. We have studied the influence of the crushing systems, liquid-liquid and solid-liq...

  7. Huiles et graisses comme agents d’enrobage dans l’industrie agro-alimentaire

    Directory of Open Access Journals (Sweden)

    Royer Annie

    2012-03-01

    Full Text Available Coating is an industrial process whereby a layer of liquid or powder is applied on the surface of a product, whatever its shape, in order to confer organoleptic (glazing agent, etc., nutritional (add of vitamins, etc. or functional properties (anti-caking agent, etc.. This paper is focusing on oils and fats used in agri-food industry: what are their main uses? What are the main vegetable fats used as coating agent? Then, some examples are given (wafer cones, dried fruits, pearl sugar, wrapped or covered cheese, IQF frozen products.

  8. Production, analyse et applications des huiles végétales en Afrique

    Directory of Open Access Journals (Sweden)

    Kapseu César

    2009-07-01

    Full Text Available This paper analyses the evolutions of the different needs related to the food and non food uses of conventional oil crops (palm, cotton, groundnuts, immerging and marketable oil culture (shea as well as the domestic oil cultures (Canarium, safou. Africa accounts for about 6.5% of the total World production of palm oil. In the last few years palm oil has witnessed an evolution in Africa through the diversification of its uses. A lot has also been done on the use of palm oil as bio-fuels. The production of cotton seed oil has equally witnessed changes from press extraction followed by solvent extraction to direct extraction with pure solvents followed by neutralisation in an appropriate medium as major innovations. West Africa produces about 50% of the total groundnuts production in Africa. Small scale processing of groundnuts is more popular than industrial processing. This is justified by the diverse uses of the different groundnut byproducts. The most remarkable innovations concern the emerging oil cultures such as shea butter. In fact the incorporation of 5% shea butter in chocolate formulations has given an added value to shea. Techniques have been put in place for improving on the production methods and quality of the butter. The evolution in this sector is better illustrated by the putting in place of an indirect solar dryer and a vertical manual screw press. The big handicap that slows down evolution remains at the level of the transfer of technology to the rural milieu. Problems on the transfer preservation of Canarium were resolved by preserving them in appropriate media and conditions. Dried safou fruits can now be found in the market. This illustrates the appropriation of technology by small and medium sized enterprises.

  9. Palmier à huile : défis et questions à la recherche

    National Research Council Canada - National Science Library

    Rival, Alain

    2013-01-01

    .... The sustainable development of oil palm cultivation thus generates many questions to research, not only in the traditional domains of plant science, but also in the fields of socio-economy and social and human sciences.

  10. Évolutions du marché français des huiles alimentaires

    Directory of Open Access Journals (Sweden)

    Dilas Guillaume

    2005-09-01

    Full Text Available The French food oil market has known a deep modification of his structure during the last 40 years both from a quantitative and a qualitative point of view. The growth of the consumption of sunflower oil during the seventies has counterbalanced the predominance of the groundnut oil, the major oil during the sixties and has defined a new perimeter of the market. The importance of nutrition and health, the development of the uses of oils by the food industry characterise the today’s market. Nowadays the French market is “coloured” by several seed or fruit oils. The success of olive oil is a good example of such trend. Furthermore, several scientific studies on Omega 3 Fatty Acids confirm the importance of oils in the nutrition balance and give them a new image and notoriety.

  11. Comparaison entre l'huile de colza pure et le gasoil EN590

    OpenAIRE

    Lumaye, François

    2012-01-01

    The experimental farm of GxABT-Université de Liège has a Deutz-Fahr M650 "Natural Power" tractor which is factory designed for rape oil. Indeed it's equipped with two fuel tanks: one for the EN590 gasoil and another for rape oil. A fuel consumption test show that rape oil running increase fuel consupmtion for more or less one liter per hour. La ferme expérimentale de GxABT possède un tracteur Deutz-Fahr Agrotron M650 « Natural Power » qui est équipé d’usine d’un système dit « à double rése...

  12. Les huiles de poissons, une ressource à protéger

    Directory of Open Access Journals (Sweden)

    Lozachmeur Stéphane

    2008-07-01

    Full Text Available Each year more than 80 millions of tons of fish are caught in seas and oceans all over the world. 1/3 of the fish are used for the manufacturing of fish oils. Omega-3 from marine sources knows a great success on different markets (food, cosmetics, OTC… but the natural resources of fish are going to decrease: that would restrict the supplying sources in the future. We need to find other sources: research has been intensified these last years to evaluate consequences of the partial or total replacement of fish oils by vegetable oils. But the problem is the fatty acids content which is not the same. The replacement of fish oils by vegetable oils induces a diminution of omega-3 fatty acids content, which is the characteristic of fish oils (EPA & DHA. Other alternatives to fish oils: marine resources such as micro-algae, genetic manipulation (phytoplankton; reusing of co-products (fish skin, eggs….

  13. Raffinage des huiles et des corps gras et élimination des contaminants

    Directory of Open Access Journals (Sweden)

    Pages Xavier

    2010-03-01

    Full Text Available Refining is a powerful technology to guarantee a high food grade quality of the refined oils and fats. This overview of many of the safety challenges related to different contaminant residues, the refining processes have to and actually do respond to, focuses for each contaminant (pesticides, polycyclic hydrocarbons, other compounds as extraction solvent, metallic element traces, aflatoxins, dioxins and polychlorobiphenyls, and new appearing contaminants like phthalates and 3-monochloropropanediol esters on their nature, origin, occurrence and regulatory status before describing the required conditions of their elimination by chemical and “physical” refining with the mention of the most efficient refining step as known from the GMP or identified from original experimental works. Identifying the physicochemical characteristics (hydro-solubility, lipophilic property, molecular weight and vapour pressure indicative of a potential contaminant behaviour during refining is an interesting preliminary orientation tool. The quality target for refined oils and fats include on one hand the control and optimisation of organoleptic and nutritional characteristics as well as stability during further storage, and on the other hand, the elimination of contaminants avoiding or controlling the formation of new undesirable compounds. For each contaminant to be eliminated, the technological issues have to be found at the crossroads of these demands.

  14. Presentation skills for the reluctant speaker.

    Science.gov (United States)

    Garon, J E

    1999-01-01

    Presentation skills are vital to clinical systems managers. This article covers four steps to successful presentations: 1) tailoring for an audience, 2) organizing a presentation, 3) mastering presentation techniques, and 4) creating effective visual aids. Tailoring for the audience entails learning about the audience and matching the presentation to their knowledge, educational level, and interests. Techniques to curry favor with an audience include: establishing common ground, relating through universal experiences, and pushing "hot buttons." Tasks involved in organizing the presentation for maximum audience interest begin with arranging the key points in a transparent organizational scheme. Audience attention is sustained using "hooks," such as graphics, anecdotes, humor, and quotations. Basic presentation techniques include appropriate rehearsal, effective eye contact with an audience, and anxiety-reducing strategies. Visual aids include flip charts, slides, transparencies, and computer presentations. Criteria for selecting the type of visual aids are delineated based on audience size and type of presentation, along with respective advantages and disadvantages. The golden rule for presentations is "Never show a slide for which you have to apologize." Rules to maximize visibility and effectiveness, including use of standard templates, sans serif fonts, dark backgrounds with light letters, mixed cases, and effective graphics, ensure that slides or projected computer images are clear and professional. Taken together, these strategies will enhance the delivery of the presentation and decrease the speaker's anxiety.

  15. Antigen cross-presentation of immune complexes.

    Science.gov (United States)

    Platzer, Barbara; Stout, Madeleine; Fiebiger, Edda

    2014-01-01

    The ability of dendritic cells (DCs) to cross-present tumor antigens has long been a focus of interest to physicians, as well as basic scientists, that aim to establish efficient cell-based cancer immune therapy. A prerequisite for exploiting this pathway for therapeutic purposes is a better understanding of the mechanisms that underlie the induction of tumor-specific cytotoxic T-lymphocyte (CTL) responses when initiated by DCs via cross-presentation. The ability of humans DC to perform cross-presentation is of utmost interest, as this cell type is a main target for cell-based immunotherapy in humans. The outcome of a cross-presentation event is guided by the nature of the antigen, the form of antigen uptake, and the subpopulation of DCs that performs presentation. Generally, CD8α(+) DCs are considered to be the most potent cross-presenting DCs. This paradigm, however, only applies to soluble antigens. During adaptive immune responses, immune complexes form when antibodies interact with their specific epitopes on soluble antigens. Immunoglobulin G (IgG) immune complexes target Fc-gamma receptors on DCs to shuttle exogenous antigens efficiently into the cross-presentation pathway. This receptor-mediated cross-presentation pathway is a well-described route for the induction of strong CD8(+) T cell responses. IgG-mediated cross-presentation is intriguing because it permits the CD8(-) DCs, which are commonly considered to be weak cross-presenters, to efficiently cross-present. Engaging multiple DC subtypes for cross-presentation might be a superior strategy to boost CTL responses in vivo. We here summarize our current understanding of how DCs use IgG-complexed antigens for the efficient induction of CTL responses. Because of its importance for human cell therapy, we also review the recent advances in the characterization of cross-presentation properties of human DC subsets.

  16. Poster presentations: valuing all forms of evidence.

    Science.gov (United States)

    Halligan, Phil

    2008-01-01

    This paper aims to assist readers who are considering submitting a poster presentation to a conference to appreciate their true worth and demonstrate the important contribution they can make to nursing scholarship and secondly, to provide new insights to conference reviewers who have the task of selecting appropriate contributions for conferences. The author will argue that the use of poster presentations is an ideal opportunity to disseminate research findings and clinical innovations. It offers a new, interesting, and thought-provoking perspective on poster presentations, which includes appraisal of extant literature and reflections about the significance of poster presentations to nursing scholarship. It highlights the benefits of submitting a poster presentation and concludes with some key points for conference reviewers to consider when deciding to select the suitability of abstracts for poster presentations or concurrent sessions.

  17. Mediated Teaching for Information Presenting and Understanding

    Directory of Open Access Journals (Sweden)

    Konstantinas Danaitis

    2011-04-01

    Full Text Available Nowadays media is readily moving into various spheres of life. The computer, projector and screen replace trivial chalk and board. Slides are used in various designated areas: promotional presentations at meetings as a form of communication between participants and also as visual presentation of lecture material content of the report. It was found that a human catches up and remembers only about 10% of what he has read, 20% of what he has heard and even 50% of what he heard and saw. Therefore, high-quality and Professional presentation of information in the slide form has a significant impact on the uptake. The authors present a solution how to present the study material qualitatively and use the media system effectively for teaching computer graphics course. This course is taught for VGTU first or second year students of almost all specialities. This presentation of study materials facilitates the teacher's work and improves the readability and solutions of study materials.

  18. Clinical presentation of adult coeliac disease.

    LENUS (Irish Health Repository)

    Tajuddin, T

    2012-02-01

    The mode of presentation of coeliac disease has been changing to more atypical or silent disease. Few studies described the clinical presentation of adult coeliac disease in Ireland in recent years. We retrospectively collected the clinical data for all patients who had a diagnosis of coeliac disease made in our centre between January 07 and December 08. Forty seven adults, predominantly females (n = 30), had a confirmed diagnosis of coeliac disease made during the study period. In our patient cohort, the presenting symptom was diarrhoea in 19 (40%) patients, while 16 patients (34%) did not have any G.I. symptoms, 10 (21%) presented with anaemia. Females presented at a significantly younger age compared to males, with median ages at diagnosis of 44.5 and 57 years, respectively (p = 0.04). Females also presented more commonly with non G.I. symptoms (p = 0.07). The reasons behind this gender difference need further study.

  19. Radiocarbon calibration - past, present and future

    Energy Technology Data Exchange (ETDEWEB)

    Plicht, J. van der E-mail: plicht@phys.rug.nl

    2004-08-01

    Calibration of the Radiocarbon timescale is traditionally based on tree-rings dated by dendrochronology. At present, the tree-ring curve dates back to about 9900 BC. Beyond this limit, marine datasets extend the present calibration curve INTCAL98 to about 15 600 years ago. Since 1998, a wealth of AMS measurements became available, covering the complete {sup 14}C dating range. No calibration curve can presently be recommended for the older part of the dating range until discrepancies are resolved.

  20. Subacute sclerosing panencephalitis presenting as mania

    Directory of Open Access Journals (Sweden)

    Aggarwal Ashish

    2011-01-01

    Full Text Available Subacute sclerosing panencephalitis (SSPE is a rare, invariably fatal degenerative disease of the central nervous system developing after measles infection. Besides neurological symptoms as initial presenting symptoms, rare reports of its presentation with pure psychiatric symptoms have been reported. We here report a case of 14 year old male who initially presented with manic symptoms and then subsequently diagnosed to be suffering from SSPE. Improtance of ruling our organic conditions is emphasized.

  1. Distinct Presentations of Hernia of Umbilical Cord

    Science.gov (United States)

    Mirza, Bilal; Ali, Waqas

    2016-01-01

    Hernia of umbilical cord is a well-known entity which presents with herniation of small bowel into the proximal part of umbilical cord. It has very good prognosis after surgical repair. Occasionally, it can have distinct presentations and varied malformations at the umbilicus which have bearing on the course of treatment and final outcome. Herein, we describe various presentations and malformations associated with hernia of umbilical cord. Embryological extrapolation is attempted for the malformations at umbilicus. PMID:27896161

  2. Trismus: An unusual presentation following road accident

    Directory of Open Access Journals (Sweden)

    Thakur Jagdeep

    2007-01-01

    Full Text Available Trismus due to trauma usually follows road accidents leading to massive faciomaxillary injury. In the literature there is no report of a foreign body causing trismus following a road accident, this rare case is an exception. We present a case of isolated presentation of trismus following a road accident. This case report stresses on the thorough evaluation of patients presenting with trismus following a road accident.

  3. Nasopharyngeal bursitis: from embryology to clinical presentation

    OpenAIRE

    AE El-Shazly; S Barriat; PP Lefebvre

    2010-01-01

    AE El-Shazly, S Barriat, PP LefebvreDepartment of Otorhinolaryngology and Head and Neck Surgery, Liege University Hospital, Liege, BelgiumAbstract: Nasopharyngeal bursitis is a relatively rare syndrome characterized by a collection of symptoms that multidisciplinary specialists should be aware of. Here we present an audit of cases presenting to a rhinology clinic over a two-year period, as well as an overview of the relevant embryology and different clinical presentations of nasopharyngeal bu...

  4. Aortic Dissection Cases Presenting with Neurological Deficit

    Directory of Open Access Journals (Sweden)

    Sibel Mumcu

    2014-06-01

    Full Text Available Aortic dissection can be fatal in case of underdiagnosis, and early treatment is essential for the survival. Although acute onset of chest or back pain is most common presenting symptoms, some patients might present with atypical findings such as acute stroke, mesenteric ischaemia, renal failure or myocardial infarction. Here, we report two cases presenting emergency room with atypical findings of aortic dissection which diagnosis is made during etiologic work up for ischemic stroke.

  5. Nasopharyngeal bursitis: from embryology to clinical presentation

    OpenAIRE

    2010-01-01

    AE El-Shazly, S Barriat, PP LefebvreDepartment of Otorhinolaryngology and Head and Neck Surgery, Liege University Hospital, Liege, BelgiumAbstract: Nasopharyngeal bursitis is a relatively rare syndrome characterized by a collection of symptoms that multidisciplinary specialists should be aware of. Here we present an audit of cases presenting to a rhinology clinic over a two-year period, as well as an overview of the relevant embryology and different clinical presentations of nasopharyngeal bu...

  6. Eccrine angiomatous hamartoma: Late onset facial presentation

    Directory of Open Access Journals (Sweden)

    Chinmay Halder

    2014-01-01

    Full Text Available Eccrine angiomatous hamartoma (EAH is a very rare benign neoplastic condition characterized by hamartomatous proliferation of eccrine glands and accompanying blood vessels and lymphatics. These lesions are more often present at birth or appear during early infancy and childhood and present as solitary nodule or plaque with occasional pain and sweating. They are generally present on the extremities, mostly the palms and soles. We report here a case of EAH in a 20-year-old female who presented with a solitary angiomatous plaque close to the lower eyelid of the right eye with occasional pain and sweating for its rarity.

  7. Take Presentations into the EFL Classroom

    Institute of Scientific and Technical Information of China (English)

    丁竞

    2014-01-01

    Presentations are activities in which people show, describe, or explain something to a group of people. They are often used in American school classrooms. On the base of the author’s referring to literature, observing classes and co-teaching prac-tice, presentations are suggested to be applied to EFL classrooms to help students improve their speaking levels and integrate their language skills efficiently. In point of ways of organizing, presentations can be divided into three types: controlled, guided and free ones. While in point of ways of applying, they can be divided into five types:interactive, role-plays, interview, note-taking, and discourse analysis ones. Thus different types of presentations should be adopted according to EFL students ’different levels and different communication purposes. Topics relating to EFL students’study, life and interest are practical for presentations. Im-portant aspects of presentations include: posture and presence, eye contact with the audience, volume and voice projection, rate of speech, use of audiovisual aids, vitality, adherence to the topic, keeping track of time, natural delivery, fluency and accuracy, the quantity of information presented, the way the topic was handled and how the questions are handled in the post-presentation session and so on. Presentation evaluations can be done by the teacher or together with student peers.

  8. Tafoni – presenting characteristics of a landform

    Directory of Open Access Journals (Sweden)

    Leni Ozis

    2014-12-01

    Full Text Available Landforms tafoni and alveoli – shallow caverns formed in boulders and rock faces – are presented in the article, with greater emphasis given on tafoni. Tafoni occur in different climate and rocks types, they are formed by cavernous weathering. In Slovenian geographical literature term tafoni rarely occurs. Exceptions are some examples of describing tafoni as landforms that are similar to another landform – rock shelters. The aim of this article is to present main characteristics of tafoni, introduce some terms that are being related to tafoni, present dilemmas related to existing knowledge of tafoni, and present tafoni’s features that are different from that of rock shelters.

  9. Selected Regional Judicial Officer Cases, 2005 - Present

    Data.gov (United States)

    U.S. Environmental Protection Agency — This dataset contains selected cases involving EPA's Regional Judicial Officers (RJOs) from 2005 to present. EPA's Regional Judicial Officers (RJOs) perform...

  10. Presentation Trainer Prototype 2.0

    NARCIS (Netherlands)

    Schneider, Jan; Börner, Dirk

    2014-01-01

    It is a tool to train nonverbal communication skills for presentations. It was the first tested version of the Presentation Trainer for the PhD project on sensor-based learning support. It includes the first dashboard design of the trainer. Available under the GNU LGPL licence version 3 or higher.

  11. Radiocarbon calibration - past, present and future

    NARCIS (Netherlands)

    van der Plicht, J

    2004-01-01

    Calibration of the Radiocarbon timescale is traditionally based on tree-rings dated by dendrochronology. At present, the tree-ring curve dates back to about 9900 BC. Beyond this limit, marine datasets extend the present calibration curve INTCAL98 to about 15600 years ago. Since 1998, a wealth of AMS

  12. Normal pressure hydrocephalus presenting as delusional disorder

    Directory of Open Access Journals (Sweden)

    Shruti Srivastava

    2015-01-01

    Full Text Available Normal pressure hydrocephalus (NPH is caused by aqueductal stenosis resulting in syndrome of gait disturbance, cognitive impairment, and urinary incontinence. Late onset psychosis should be evaluated thoroughly to rule out any organic cause. We present the case of a female patient presenting with delusions, gait disturbances, urinary incontinence in her 50s.

  13. History Making and Present Day Politics

    DEFF Research Database (Denmark)

    Jensen, Steffen Bo

    2008-01-01

    Review of History Making and Present Day Politics: The meaning of Collective Memory in South Africa, by Hans Erik Stolten (ed.). Uppsala: The Nordic Africa Institute, 2007; pp. 376.......Review of History Making and Present Day Politics: The meaning of Collective Memory in South Africa, by Hans Erik Stolten (ed.). Uppsala: The Nordic Africa Institute, 2007; pp. 376....

  14. An intramedullary tumor presenting with hyperhidrosis

    Directory of Open Access Journals (Sweden)

    Chatterjee Sandip

    2004-07-01

    Full Text Available A case of a cervical intramedullary tumor is reported whose presentation was with disabling hyperhidrosis. The symptom resolved after surgical debulking of the tumor. Hyperhidrosis as a presenting manifestation of an intramedullary tumor has not been reported earlier.

  15. Rheumatological presentation of developmental bone diseases

    Energy Technology Data Exchange (ETDEWEB)

    Kalifa, Gabriel; Cohen, Pierre alain; Hamidou, Amine

    2000-02-01

    Developmental bone disease may be present, with rheumatological disorders as the major symptoms, even in children. The major lesions encountered are early osteo arthritis, osteo chondromatosis and vertebral involvement with two leading types, pseudo Scheuermann's disease or pseudo ankylosing spondylitis. This paper presents the different features and lists the rheumatological problems in bone dysplasia.

  16. Presenting directions with a vibrotactile torso display

    NARCIS (Netherlands)

    Erp, J.B.F. van

    2005-01-01

    Vibrotactile displays covering the torso present spatial information in an intuitive way since the stimuli are directly mapped to the body coordinates; left is left, front is front, etc. The present study investigated the direction in the horizontal plane to which a specific torso location is mapped

  17. European spatial planning: past, present, future

    NARCIS (Netherlands)

    Faludi, A.K.F.

    2009-01-01

    Three stages have been identified in the development of the EU: the launch era; the doldrums era and the renaissance/boom era. Presently though, the EU is in a crisis. These stages serve as a framework for discussing the past, present and future for European spatial planning. Thus, during the launch

  18. Chorea as the presentating feature of neurosyphilis

    Directory of Open Access Journals (Sweden)

    Ozben Serkan

    2009-01-01

    Full Text Available Syphilis is still a significant public health problem in developing countries. Although chorea is a very rare manifestation of neurosyphilis, it might be on occasions the initial symptom. This report presents a patients with neurosyphilis who had chorea as the initial presenting symptom.

  19. Neurocysticercosis presenting as Millard Gubler syndrome

    Directory of Open Access Journals (Sweden)

    Rajniti Prasad

    2012-01-01

    Full Text Available Neurocysticercosis is a common childhood neurological illness in India. A variety of presentations have been reported in the literature, including weber syndrome. Neurocysticercosis, manifesting as Millard Gubler syndrome, have not been reported in literature. Therefore, we report a child presented to us with Millard Gubler syndrome due to pontomedullary neurocysticercosis and was treated successfully.

  20. Information Presentation for Effective E-Learning

    Science.gov (United States)

    Kordel, Richard

    2008-01-01

    In moving information onto a computer, people generally assume that the format and presentation have little effect on the information itself. Every online educator should consider the effect on students of the electronic presentation of information, however, as that assumption is questionable. Although many writers have investigated the computer…

  1. Normal pressure hydrocephalus presenting as delusional disorder.

    Science.gov (United States)

    Srivastava, Shruti; Bhatia, Manjeet Singh; Gautam, Priyanka

    2015-01-01

    Normal pressure hydrocephalus (NPH) is caused by aqueductal stenosis resulting in syndrome of gait disturbance, cognitive impairment, and urinary incontinence. Late onset psychosis should be evaluated thoroughly to rule out any organic cause. We present the case of a female patient presenting with delusions, gait disturbances, urinary incontinence in her 50s.

  2. Chikungunya fever presenting with protracted severe pruritus.

    Science.gov (United States)

    Cunha, Burke A; Leonichev, Victoria B; Raza, Muhammad

    2016-01-01

    Travelers returning from the tropics often present with rash/fever. Those with rash/fever and myalgias/arthralgias are most likely due to chikungunya fever, dengue fever, or Zika virus. In these arthropod viral transmitted infections, the rash may be pruritic. The case presented here is that of chikungunya fever remarkable for the intensity and duration of her pruritis.

  3. Tuberculosis Endometritis Presenting as A Leiomyoma

    Directory of Open Access Journals (Sweden)

    Mahboobeh Shirazi

    2015-02-01

    Full Text Available Genitourinary tuberculosis is a common extrapulmonary manifestation of tuberculosis. Taking into consideration that genitourinary tuberculosis may be associated with a diversity of presentations, its diagnoses may be difficult. A young woman with an initial presumptive diagnosis of a uterine leiomyoma presented with abdominal pain and a pelvic mass that after further investigations, she was diagnosed with genital tuberculosis.

  4. Holocord syrinx presenting as hemi anhidrosis

    Directory of Open Access Journals (Sweden)

    Sunil Kumar

    2013-01-01

    Full Text Available We present a 41-year-old man with Chiari type 1 malformation and syrinx up to tenth thoracic level who presented with left side hemi anhidrosis. Neurological findings of syrinx were absent in this case. Though Horner′s syndrome is reported, this report is probably first.

  5. Learn to Live in the Present Moment

    Institute of Scientific and Technical Information of China (English)

    贾庆文

    2002-01-01

    To a large degree, the measure of our peace of mind is determined by how much we are able to live in the present moment. Irrespective of what happened yesterday or last year, and what may or may not happen tomorrow, the present moment is where you are-always!

  6. Speechline - a method for teaching oral presentation

    DEFF Research Database (Denmark)

    Juel, Henrik

    2015-01-01

    The Speech-line method aims at improving the active rhetorical skills of students, i.e. their ability to present academic subjects in a clear and convincing manner. This is relevant not only for everyday classroom work, but also for oral exams, for presenting research projects, and for addressing...

  7. 19 CFR 112.47 - Wrongful presentation.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Wrongful presentation. 112.47 Section 112.47 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY CARRIERS, CARTMEN, AND LIGHTERMEN Identification Cards § 112.47 Wrongful presentation. If...

  8. Radiocarbon calibration - past, present and future

    NARCIS (Netherlands)

    van der Plicht, J

    Calibration of the Radiocarbon timescale is traditionally based on tree-rings dated by dendrochronology. At present, the tree-ring curve dates back to about 9900 BC. Beyond this limit, marine datasets extend the present calibration curve INTCAL98 to about 15600 years ago. Since 1998, a wealth of AMS

  9. Hartnup disease presenting in an adult.

    Science.gov (United States)

    Oakley, A; Wallace, J

    1994-09-01

    A young woman presented with pellagra. Her symptoms were precipitated by prolonged lactation and increased activity. Dietary intake of niacin was within recommended guidelines. Chromatography of urinary amino acids was diagnostic of Hartnup disease, an inherited disorder usually presenting in childhood. Her symptoms resolved with oral nicotinamide.

  10. Unusual presentations of Comamonas kerstersii infection

    Directory of Open Access Journals (Sweden)

    M. Almuzara

    2017-09-01

    Full Text Available The association of Comamonas kerstersii with peritonitis resulting from the presence of perforated appendix has previously been described by our research team. In the present study, we describe the isolation of this microorganism from two forms of unusual presentations of C. kerstersii infection not previously described in the literature: localized intra-abdominal infection (psoas abscess and pelvic peritonitis.

  11. Changing Dynamics in the Voluntary Market (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Heeter, J.

    2014-12-01

    Voluntary green power markets are those in which consumers and institutions voluntarily purchase renewable energy to match their electricity needs. This presentation, presented at the Renewable Energy Markets Conference in December 2014, outlines the voluntary market in 2013, including community choice aggregation and community solar.

  12. Tumors Presenting as Multiple Cranial Nerve Palsies

    Directory of Open Access Journals (Sweden)

    Kishore Kumar

    2017-04-01

    Full Text Available Cranial nerve palsy could be one of the presenting features of underlying benign or malignant tumors of the head and neck. The tumor can involve the cranial nerves by local compression, direct infiltration or by paraneoplastic process. Cranial nerve involvement depends on the anatomical course of the cranial nerve and the site of the tumor. Patients may present with single or multiple cranial nerve palsies. Multiple cranial nerve involvement could be sequential or discrete, unilateral or bilateral, painless or painful. The presentation could be acute, subacute or recurrent. Anatomic localization is the first step in the evaluation of these patients. The lesion could be in the brain stem, meninges, base of skull, extracranial or systemic disease itself. We present 3 cases of underlying neoplasms presenting as cranial nerve palsies: a case of glomus tumor presenting as cochlear, glossopharyngeal, vagus and hypoglossal nerve palsies, clivus tumor presenting as abducens nerve palsy, and diffuse large B-cell lymphoma presenting as oculomotor, trochlear, trigeminal and abducens nerve palsies due to paraneoplastic involvement. History and physical examination, imaging, autoantibodies and biopsy if feasible are useful for the diagnosis. Management outcomes depend on the treatment of the underlying tumor.

  13. Neurofibromatosis type II presenting as vertical diplopia.

    Science.gov (United States)

    Sokwala, Ahmed; Knapp, Christopher; Gottlob, Irene

    2004-09-01

    Neurofibromatosis type II (NF II) is rare and most commonly presents with hearing loss, tinnitus and/or vestibular disturbance in the third decade of life. The authors describe a rare case presenting with NF II with vertical diplopia due to IV(th) nerve palsy. The patient was otherwise asymptomatic despite multiple extensive lesions on MRI.

  14. Atypical Presentation of Multiple Foreign Body Ingestion

    Science.gov (United States)

    Bent, Sultan; Ayan, Burak

    2017-01-01

    Foreign body ingestion is very common in childhood especially under 3 year of age. Pica syndrome is characterized by an appetite for substances that are largely non-nutritive. We present a 3-year old girl who presented to ER with symptoms and signs of intestinal obstruction. PMID:28164004

  15. The Effect of Summarizing and Presentation Strategies

    Directory of Open Access Journals (Sweden)

    Hooshang Khoshsima

    2014-07-01

    Full Text Available The present study aimed to find out the effect of summarizing and presentation strategies on Iranian intermediate EFL learners’ reading comprehension. 61 students were selected and divided into two experimental and control groups. The homogeneity of their proficiency level was established using a TOEFL proficiency test. The experimental group used the two strategies three sessions each week for twenty weeks, while the control group was not trained on the strategies. After every two-week instruction, an immediate posttest was administered. At the end of the study, a post-test was administered to both groups. Paired-sample t-test and Independent sample t-test were used for analysis. The results of the study revealed that summarizing and presentation strategies had significant effect on promoting reading comprehension of intermediate EFL learners. It also indicated that the presentation strategy was significantly more effective on students’ reading comprehension. Keywords: reading strategy, summarizing, presentation, reading comprehension, EFL learners

  16. Menkes Disease Presenting with Epilepsia Partialis Continua

    Directory of Open Access Journals (Sweden)

    Tamer Rizk

    2014-01-01

    Full Text Available Aim. We aim to describe a female patient with Menkes disease who presented with epilepsia partialis continua. Case Presentation. Seventeen-months-old Saudi infant was presented with repetitive seizures and was diagnosed to have epilepsia partialis continua. Discussion. Menkes disease (OMIM: 309400 is considered a rare, X-linked recessive neurodegenerative disorder resulting from a mutation in the gene coding for the copper transporting ATPase (ATP7A. Affected individuals usually present with kinky hair, skeletal changes, prolonged jaundice, hypothermia, developmental regression, decreased tone, spasticity, weakness, and therapy resistant seizures. Conclusion. Raising awareness of abnormal presentation of this rare disease may help in the control of seizures through subcutaneous copper supplementation.

  17. Placenta Percreta Presenting with Delayed Haematuria.

    Science.gov (United States)

    Wagaskar, Vinayak Gorakhanath; Daga, Sudarshan Omprakash; Patwardhan, Sujata Kiran

    2015-12-01

    Placenta percreta presents as life threatening complications with bladder invasion. A condition of placenta invading urinary bladder presented with differential diagnosis of gestational trophoblastic neoplasia on imaging and responded to chemotherapy. A 35-year-old primi-gravida presented at term with per vaginal bleeding. During caesarian section placental mass totally invading uterine myometrium was found. She was given single dose of Methotrexate. After 2 months she presented with gross haematuria with clot retention two times. Her MRI was suggestive of gestational trophoblastic neoplasia of size 19 X 10 X 13cm. Her beta-Human Chorionic Gonadotropin levels were 691.23 mIU/ml. She was given total four doses of methotrexate. At present size of mass was 1.6 X1.3X 1.1cm. Her beta Human Chorionic Gonadotropin level dropped down to 2mIU/ml. Patient was not willing for further intervention or for follow up.

  18. Determination of Three-Phase Relative Permeabilities under Reservoir Conditions by Hot Water and Steamflood Experiments Détermination de perméabilités relatives tri-phasiques en conditions de réservoir, à partir d'expériences de balayages à l'eau chaude et à la vapeur

    Directory of Open Access Journals (Sweden)

    Quettier L.

    2006-11-01

    points extrêmes, mais pas sur la forme, des courbes de perméabilités relatives. L'expérience de balayage à la vapeur a été réalisée dans une cellule porte-échantillon adiabatique. Les observations expérimentales ont mis en évidence l'importance des phénomènes de thermomigration des composants légers de l'huile et de dissolution des carbonates (production importante de CO2. En utilisant les perméabilités relatives eau-huile précédemment déterminées, la simulation numérique de cette expérience a permis d'accéder à la perméabilité relative triphasique à l'huile, donnée essentielle pour l'interprétation numérique d'un pilote de balayage à la vapeur. Enfin, une étude de paramètres a quantifié l'influence des différents mécanismes mis en jeu dans les balayages à l'eau chaude et à la vapeur.

  19. An unusual presentation of galactosemia: Hemophagocytic lymphohistiocytosis

    Directory of Open Access Journals (Sweden)

    Ahmet Afşin Kundak

    2012-12-01

    Full Text Available Hemophagocytic lymphohistiocytosis (HLH is a rare life-threatening condition. Uncontrolled proliferation of activated lymphocytes secreting high amounts of inflammatory cytokines seems to be the main pathogenesis. The diagnosis of HLH can often be difficult. It may presents in many forms such as fever of unknown origin, hepatitis, acute liver failure, and sepsis-like illness. Here we present a newborn galactosemia case presented with HLH. Close monitoring of the diagnostic criteria of HLH during the course of galactosemia-associated hemophagocytosis, both before and after dietary treatment, should be performed in order to fully determine if the triggering mechanism is infection or accumulation of metabolites.

  20. SMARTS Present and Future - A Discussion

    Science.gov (United States)

    Bailyn, Charles; van der Bliek, N. S.; Fischer, D.

    2011-05-01

    The second session of the SMARTS "Meeting-in-a-Meeting" will be devoted to discussing the future of the consortium. As a basis for discussion, the SMARTS Principal Scientist (Charles Bailyn) and the CTIO Deputy Director (Nicole van der Bliek) will present information on the current SMARTS operation, and future options. Specific updates will be presented on current oversubscription and publication rates for the various SMARTS capabilities, along with some implications for the long-term viability of the current financial model. A number of options for future instrumentation upgrades and possibilities for changes in the current observing modes will be presented for discussion.

  1. Lichen planus pigmentosus: two atypical presentation

    Directory of Open Access Journals (Sweden)

    Falguni Nag

    2013-01-01

    Full Text Available Lichen planus pigmentosus (LPP is a chronic pigmentary disorder with variable pattern of presentation. We here by present two cases of LPP one with parallel band like pigmentation over abdomen sparing the abdominal skin creases and other with parallel band like pattern following the Blaschko’s lines over left side of the abdomen. Our cases are unique not only for its presentation but also for the pattern of distribution and LPP should be the differential diagnosis in any pigmentary disorders.

  2. Gynaecomastia as the initial presentation of thyrotoxicosis

    Directory of Open Access Journals (Sweden)

    Triranjan Sanyal

    2012-01-01

    Full Text Available Gynaecomastia is a well-recognized manifestation of thyrotoxicosis occurring in a widely variable percentage. Some studies have reported the percentage to be high as 40% while others report it being around 10%. The variation can be attributed to the difference in the criteria used to define gynae-comaslia or racial factors. However, thyrotoxicosis presenting with gynaceomastia as an intial manifestation is very rare. Only handful case reports are found in literature. Here we present a case of 35-year-old Indian male, with thyrotoxcosis who presented initially with painful bilateral gynaceomastia.

  3. Fundamentals of surgical research course: research presentations.

    Science.gov (United States)

    Mayer, Kathrin

    2005-10-01

    The effective communication of research outcomes is a skill that can be learned. To make the greatest impact, it is imperative to know your audience. Oral communication is a highly effective means for dissemination of new information. The preparation of a research presentation requires significant time. The researcher must determine the key messages to be delivered and plan the presentation accordingly. High quality visual aids can impress your audience and, in combination with a succinct oral presentation, can increase retention of the material. In addition to the communication of the raw scientific data and results, the importance of stance, appearance, voice, and eye contact necessary to engage your audience should not be overlooked.

  4. Delayed presentation of traumatic intraperitoneal bladder rupture

    Energy Technology Data Exchange (ETDEWEB)

    Brown, D.; Magill, H.L.; Black, T.L.

    1986-03-01

    A child with urine ascites as a delayed manifestation of post-traumatic intraperitoneal bladder rupture is presented. The diagnosis was suggested by abdominal CT scan and confirmed with a cystogram. While uncommon, late presentation of intraperitoneal bladder rupture following trauma may occur from masking of a primary laceration or development of secondary rupture at the site of a hematoma in the bladder wall. Since CT may be a primary diagnostic study performed following abdominal trauma, the radiologist should be aware of CT findings suggesting bladder rupture and of the possibility of delayed presentation of this injury.

  5. Lymphogranuloma Venereum Presenting as a Rectovaginal Fistula

    Directory of Open Access Journals (Sweden)

    C. M. Lynch

    1999-01-01

    Full Text Available Lymphogranuloma venereum (LGV is a rare form of the sexually transmitted disease caused by Chlamydia trachomatis. In the United States, there are fewer than 350 cases per year. In a review of the world’s literature, there has not been a case reported in the last thirty years of a case ofLGV presenting as a rectovaginal fistula. We present a case of an otherwise healthy American woman who presented with a rectovaginal fistula. Although uncommon, LGV does occur in developed countries and may have devastating tissue destruction if not recognized and treated before the tertiary stage. Infect. Dis. Obstet. Gynecol. 7:199–201, 1999.

  6. Primary hyperparathyroidism presenting as acute gallstone pancreatitis

    Institute of Scientific and Technical Information of China (English)

    HE Jian-hong; ZHANG Quan-bao; LI Yu-min; ZHU You-quan; LI Xun; SHI Bin

    2010-01-01

    @@ Primary hyperparathyroidism (PHPT) is a generalized disorder of calcium metabolism resulting from an abnormally high level of serum calcium and an increased level of parathormone (PTH).1,2 Traditionally, symptomatic PHPT patients present with a variety of disorders including fatigue, amyotrophy, memory impairment, emotional instability, hallucination, irritation, loss of consciousness, abdominal distention, nausea, vomiting, constipation, acute pancreatitis, refractory peptic ulcer, osteopenia, hypertension, etc.3-5 Acute pancreatitis (AP) is an uncommon presentation of PHPT.6-8 We report a typical case of primary hyperparathyroidism with hypercalcemic crisis presenting as acute gallstone pancreatitis.

  7. Offshore Wind Energy Market Overview (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Baring-Gould, I.

    2013-07-01

    This presentation describes the current international market conditions regarding offshore wind, including the breakdown of installation costs, how to reduce costs, and the physical siting considerations considered when planning offshore wind construction. The presentation offers several examples of international existing and planned offshore wind farm sites and compares existing international offshore resources with U.S. resources. The presentation covers future offshore wind trends and cites some challenges that the United States must overcome before it will be able to fully develop offshore wind sites.

  8. Hemorrhagic Colloid Cyst Presenting with Acute Hydrocephaly

    Science.gov (United States)

    Akhavan, Reza; Zandi, Behrouz; Pezeshki-Rad, Masoud; Farrokh, Donya

    2017-01-01

    Colloid cysts are benign slow-growing cystic lesions located on the roof of the third ventricle that usually present with symptoms related to gradual rise of intracranial pressure. They mostly remain asymptomatic and sometimes grow progressively and cause diverse symptoms associated with increased intracranial pressure such as headache, diplopia, and sixth cranial nerve palsy. Here we report a 47-year-old female who presented to the emergency department with acute severe headache and nausea/vomiting. On MRI examination acute hydrocephaly due to hemorrhagic colloid cyst was detected. Acute hemorrhage in colloid cysts is extremely rare and may present with symptoms of acute increase in the intracranial pressure. Intracystic hemorrhage is very rarely reported as a complication of colloid cyst presenting with paroxysmal symptoms of acute hydrocephaly. PMID:28210514

  9. Unusual Presentation of Primary Sclerosing Cholangitis

    Directory of Open Access Journals (Sweden)

    BC Pineau

    1997-01-01

    Full Text Available A 23-year-old man presenting with acute pancreatitis and autoimmune hemolytic anemia was diagnosed with primary sclerosing cholangitis (PSC without evidence of ulcerative colitis. This constellation of rare associations constitutes a unique mode of presentation of PSC. Within two years he also developed ankylosing spondylitis with sacroiliitis. Disordered immune regulation as a major factor in the mechanism of injury in PSC is supported by its increased association with other immunologically mediated disorders, most notably ulcerative colitis. Autoimmune hemolytic anemia, however, has been reported to be associated with PSC on only two occasions, and ankylosing spondylitis in the absence of ulcerative colitis is also unusual. In addition, the presentation of PSC with acute pancreatitis has rarely been described. This patient presented with several unusual features of PSC.

  10. Primary amyloidosis presenting as renal infarction

    Energy Technology Data Exchange (ETDEWEB)

    Arias, M. [Dept. of Radiology, Clinica Universitaria de Navarra, Pamplona (Spain); Abreu, J.A. [Dept. of Radiology, Clinica Universitaria de Navarra, Pamplona (Spain); Iglesias, A. [Dept. of Radiology, Clinica Universitaria de Navarra, Pamplona (Spain); Longo, J. [Dept. of Radiology, Clinica Universitaria de Navarra, Pamplona (Spain); Lecumberri, F. [Dept. of Radiology, Clinica Universitaria de Navarra, Pamplona (Spain); Vega, F. [Dept. of Pathology, Clinica Universitaria de Navarra, Pamplona (Spain)

    1996-06-01

    We report a case of primary amyloidosis affecting the kidney and presenting as a renal infarction on computed tomography and ultrasound examination. To our knowledge, it is the first case in the radiological literature with these imaging characteristics. (orig.)

  11. Unusual presentation in Axenfeld-Rieger syndrome

    Directory of Open Access Journals (Sweden)

    Rajul S Parikh

    2011-01-01

    Full Text Available We report an unusual presentation of a case of Axenfeld-Rieger (A-R syndrome. A 14-year-old male presented with gradual dimness of vision for 1 year and redness of left eye for 3 days. The patient had megalocornea with Haab′s striae in the right eye and posterior embryotoxon in both the eyes. In the left eye, there was a white cord-like structure traversing the anterior chamber with adhesions to iris tissue along its course. On two antiglaucoma medications, his intraocular pressure (IOP was 22 mm Hg in the right eye and 18 mm Hg in the left eye. Gonioscopy revealed a cord-like structure originating at the level of Schwalbe′s line. He underwent right eye trabeculectomy with mitomycin-C. This case highlights a rare presentation of a strange cord-like structure, a rare presentation of A-R syndrome.

  12. Late presentation for HIV care across Europe

    DEFF Research Database (Denmark)

    Mocroft, Amanda; Lundgren, Jens; Antinori, Andrea

    2015-01-01

    Late presentation (LP) for HIV care across Europe remains a significant issue. We provide a cross-European update from 34 countries on the prevalence and risk factors of LP for 2010-2013. People aged ≥ 16 presenting for HIV care (earliest of HIV-diagnosis, first clinic visit or cohort enrollment......) after 1 January 2010 with available CD4 count within six months of presentation were included. LP was defined as presentation with a CD4 count HIV diagnosis. Logistic regression investigated changes in LP over time. A total.......02-1.32), and a significant decline in LP in northern Europe (aOR/year later 0.89; 95% CI: 0.85-0.94). Further improvements in effective HIV testing strategies, with a focus on vulnerable groups, are required across the European continent....

  13. Nanotechnology in sustainable agriculture: Present concerns and ...

    African Journals Online (AJOL)

    Nanotechnology in sustainable agriculture: Present concerns and future aspects. ... daily food shortages as a result of environmental impacts or political instability, ... safety to reduced agricultural inputs and improved processing and nutrition.

  14. ACTA Technology Presents EPA with Patent Copy

    Science.gov (United States)

    US EPA SBIR awardee, ACTA Technology, presented James H. Johnson, Director of the US EPA National Center for Environmental Research, and April Richards, Program Manager of the US EPA's SBIR Program, with a copy of their Red Ribbon patent.

  15. Multiple myeloma presenting as acute pancreatitis.

    Science.gov (United States)

    Mishra, Shakti Bedanta; Azim, Afzal; Mukherjee, Arindam

    2017-09-01

    A 36 year old male presented to the emergency department with severe epigastric pain, nausea, vomiting without hematemesis, diarrhea and anorexia. He presented with respiratory distress, shock and fever at the emergency. He was intubated and shifted to the intensive care unit with the diagnosis of acute pancreatitis with hypercalcemia and an elevated amylase and lipase's well as thrombocytopenia and elevated creatinine. CT scan of abdomen was done which showed lytic bone lesions in the spine and necrosis of the pancrease. He was evaluated for multiple myeloma and it was confirmed in a bone marrow biopsy. Multiple myeloma usually is seen in patients aged more than 60 yrs. The typical presentation of multiple myeloma is anemia, back pain, and an elevated sedimentation rate. Patients with multiple myeloma have hypercalcemia but it's rarely manifested as acute pancreatitis. This case shows a rare presentation of multiple myeloma as acute pancreatitis in a younger adult. Copyright © 2017 Elsevier Inc. All rights reserved.

  16. Presentation Trainer Prototype 1.0

    NARCIS (Netherlands)

    Börner, Dirk; Specht, Marcus

    2014-01-01

    This software sketch comprises the first prototype of the presentation trainer. The application uses the Microsoft Kinect sensor and was built using the Processing 1.5.1 development environment. Available under the GNU LGPL licence version 3 or higher.

  17. Acute Lymphoblastic Leukaemia presenting as Juvenile Idiopathic ...

    African Journals Online (AJOL)

    Acute Lymphoblastic Leukaemia presenting as Juvenile Idiopathic Arthritis in a Nigerian boy. ... lead to delay in commencing appropriate treatment. ... of two months duration, had an elevated Rheumatoid factor and X-ray findings suggestive of ...

  18. New hazards in paediatric poisoning presentations.

    LENUS (Irish Health Repository)

    Moore, C

    2015-02-01

    Accidental ingestion is an important preventable cause of childhood morbidity. All accidental ingestion presentations (n = 478) to a tertiary paediatric ED from January 2010 to December 2011 were analysed. These results were compared with a similar study in the same institution ten years previously in 2001 and showed that while accidental ingestions constituted a higher proportion of presentations (0.5% in this study v 0.45% in 2001), fewer had investigations performed (21% v 35%) and fewer were admitted (7% v 20%). Accidental ingestions account for 0.5% of presentations and are an important focus of home safety information for parents and guardians. Paracetamol (n = 67, 14%) and liquid detergent capsules (n = 44, 9.2%) were the two most common substances implicated in these presentations, and have the potential to cause severe morbidity and mortality.

  19. Spitz Naevus With Ulceration - A Rare Presentation

    Directory of Open Access Journals (Sweden)

    Kanwar A. J

    2001-01-01

    Full Text Available A 25 year old female presented with an asymptomatic reddish brown nodule on the nose. History of ulceration and bleeding suggested a diagnosis of granuloma pyogenicum. The lesion was excised. Histology revealed features of Spitz naevus.

  20. Trough Receiver Heat Loss Testing (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Lewandowski, A.; Feik, C.; Hansen, R.; Phillips, S.; Bingham, C.; Netter, J.; Forristal, R.; Burkholder, F.; Meglan, B.; Wolfrum, E.

    2006-02-01

    This presentation describes the design, fabrication, and qualification of an experimental capability for thermal loss testing of full-size trough receiver elements; and the testing on a variety of receivers.