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  • Canadian Science Publishing  (4)
  • 2005-2009  (4)
  • 1
    Online Resource
    Online Resource
    The rapid onset of hyperglycaemia in ZDF rats was associated with a widespread alteration of metabolic proteins implicated in glucose metabolism in the heart
    Canadian Science Publishing ; 2006
    In:  Canadian Journal of Physiology and Pharmacology Vol. 84, No. 11 ( 2006-11), p. 1205-1213
    Details
    In: Canadian Journal of Physiology and Pharmacology, Canadian Science Publishing, Vol. 84, No. 11 ( 2006-11), p. 1205-1213
    Abstract: The present study tested the hypothesis that the phosphorylation and regulation of metabolic proteins implicated in glucose homeostasis were impaired in the heart of the type 2 diabetic Zucker-diabetic-fatty (ZDF) rat model. The onset of hyperglycaemia in ZDF rats was not uniform, instead it either progressed rapidly (3–4 weeks) or was delayed (6–8 weeks). In both the early and late onset hyperglycaemic ZDF rats, AMPKα Thr 172 phosphorylation in the heart was significantly decreased. In the early onset hyperglycaemic ZDF rats, PKB Ser 473 phosphorylation was reduced, whereas Thr 308 phosphorylation was significantly increased. In the late onset hyperglycaemic ZDF rats, PKB Ser 473 phosphorylation was unchanged, but Thr 308 phosphorylation remained elevated. Cardiac GLUT4 protein and mRNA expression were significantly reduced in the early onset hyperglycaemic ZDF rats, whereas increased protein expression was observed in the late onset hyperglycaemic ZDF rats. In conclusion, the present study has demonstrated that following a more rapid onset of hyperglycaemia, the type 2 diabetic heart is more prone to alterations in the signaling proteins implicated in glucose metabolism.
    Type of Medium: Online Resource
    ISSN: 0008-4212 , 1205-7541
    URL: Article
    DOI: 10.1139/y06-070
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2006
    detail.hit.zdb_id: 2004356-9
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  • 2
    Online Resource
    Online Resource
    Traitement et stabilisation chimique de déchets d’aluminerie contaminés en ions fluoruresArticles envoyés à la Revue du génie et de la science de l'environnement
    Canadian Science Publishing ; 2009
    In:  Canadian Journal of Civil Engineering Vol. 36, No. 5 ( 2009-05), p. 859-870
    Details
    In: Canadian Journal of Civil Engineering, Canadian Science Publishing, Vol. 36, No. 5 ( 2009-05), p. 859-870
    Abstract: Aluminium plant production wastes are contaminated by fluoride according to TCLP (toxicity characteristics leaching procedure) and Quebec legislation ( 〉 150 mg F – /L). Those wastes contain 2–323 g F – /kg. The extraction of fluoride by acid leaching (H 2 SO 4 , pH 1.5) at total solids content between 1% and 16% allows the removal of approximately 33% of F – but does not respect the TCLP regulation. However, the chemical stabilization of aluminium wastes by use of calcium hydroxide (Ca(OH) 2 ) at a concentration varying from 10 to 12 g/L in the suspension of E C (100 g/L) allowed us to record lower concentrations of fluoride ions (110–115 mg F – /L) in the leachate from the TCLP test. The subsequent treatment of the dehydration filtrate of stabilized residues by decreasing the pH from the initial value (pH 11.9 or 12.0) to pH values between 7.0 and 8.5 by addition of an inorganic acid (H 2 SO 4 , 10 mol/L) removed up to 98% of fluoride ions by precipitation.
    Type of Medium: Online Resource
    ISSN: 0315-1468 , 1208-6029
    URL: Article
    DOI: 10.1139/L09-034
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2009
    detail.hit.zdb_id: 1490923-6
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  • 3
    Online Resource
    Online Resource
    Utilisation des écailles de cacao comme support de biofiltration pour le traitement d’effluents de l’industrie agro-alimentaireArticles envoyés à la Revue du génie et de la science de l'environnement.
    Canadian Science Publishing ; 2009
    In:  Canadian Journal of Civil Engineering Vol. 36, No. 6 ( 2009-06), p. 1059-1070
    Details
    In: Canadian Journal of Civil Engineering, Canadian Science Publishing, Vol. 36, No. 6 ( 2009-06), p. 1059-1070
    Abstract: L’industrie agro-alimentaire produit une quantité importante de résidus, ou co-produits, dont certains sont potentiellement valorisables. Dans cette étude, les écailles de cacao, un résidu de la fabrication du chocolat, ont été étudiées comme support de biomasse dans un biofiltre aérobie à co-courant ascendant. L’influence de divers paramètres (temps de rétention hydraulique (TRH), granulométrie du support, apport de nutriments, pH) a été vérifiée sur la performance d’élimination de la demande chimique (DCO) et biochimique (DBO 5 ) en oxygène. Un support plastique (Kaldnes, K1) a été utilisé comme support contrôle de biomasse. Les écailles de cacao ont démontré un bon potentiel pour le traitement d’effluents agro-alimentaires fortement chargés (DCO tot 3000–6000 mg·L –1 ). Les résultats obtenus montrent que les performances épuratoires des écailles sont inférieures à celles du support plastique. Les écailles de cacao doivent également être remplacées à une fréquence d’environ une fois toutes les 2 à 3 semaines. Toutefois, les boues produites par le traitement, composées d’écailles usées et de biomasse, sont riches en azote et peu contaminées et sont donc potentiellement valorisables en agriculture ou par compostage.
    Type of Medium: Online Resource
    ISSN: 0315-1468 , 1208-6029
    URL: Article
    DOI: 10.1139/L09-063
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2009
    detail.hit.zdb_id: 1490923-6
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  • 4
    Online Resource
    Online Resource
    Characterization of an amphimull under Mediterranean evergreen oak forest ( Quercus ilex ): micromorphological and biodynamic descriptions
    Canadian Science Publishing ; 2008
    In:  Canadian Journal of Forest Research Vol. 38, No. 2 ( 2008-02), p. 268-277
    Details
    In: Canadian Journal of Forest Research, Canadian Science Publishing, Vol. 38, No. 2 ( 2008-02), p. 268-277
    Abstract: The relationships between microorganisms and microfauna were studied in an evergreen oak ( Quercus ilex L.) forest floor located in a French Mediterranean region characterized by hot and dry summers. The soil was a brown fersialitic soil with an amphimull, i.e., a mull with a thick litter. A micromorphological study of both litter and organomineral layers was used to observe relationships between white-rot fungi and fauna, such as oribatids, millipedes, enchytraeids, and earthworms. Microbiological properties of the litter and physicochemical properties of the soil were analysed. Enchytraeids comminute the faeces of other animals, whereas earthworms form aggregates. These two opposite actions probably modify aeration and water movements in deeper layers. Brown leaves and animal faeces constitute a nutritional substrate for white-rot fungi and other animals. Inside degraded cells of rootlets and bleached leaves, fungi form calcium oxalate crystals because the absorbent complex is saturated by an excess of calcium. Enzymes such as laccases, manganese peroxidases, cellulases, or xylanases were detected in the litter at significant levels. The high activity values of phosphatases in the litter could reflect a deficiency in available phosphorus. This deficiency could partly explain a low rate of litter degradation and the presence of an OH sublayer.
    Type of Medium: Online Resource
    ISSN: 0045-5067 , 1208-6037
    URL: Article
    DOI: 10.1139/X07-165
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2008
    detail.hit.zdb_id: 1473096-0
    SSG: 23
    SSG: 12
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