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For the last 20 years, studies conducted in North America, Scandinavia, and New Zealand have shown that pulp and paper mill effluents affect fish reproduction. Despite the level of effort applied, few leads are available regarding the factors responsible. Effluents affect reproduction in multiple fi...
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A method for increasing the mass of a storage organ of a plant comprising tansforming the plant with at least one heterologous gene that encodes an enzyme that results in NAD(P)H consumption is disclosed. Preferably the method comprises transforming the plant with a gene that encodes an enzyme that ...
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Adult yellow perch (Perca flavescens) were stocked into experimental ponds designed to emulate possible aquatic reclamation alternatives of the oil sands mining industry. After 5 and 11 months, mixed-function oxygenase (MFO) activity, Liver conjugation enzymes, bile polycyclic aromatic hydrocarbon (...
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Each year, potato late blight [Phytophthora erythroseptica] and pink rot [PhytolAthora erythroscptica] are responsible for significant postharvest economic losses. Because of restrictions on the use of synthetic fungicides on food, there is Currently a need for less toxic, disease-controlling compou...
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1. The life histories and population dynamics of the burrowing mayflies Hexagenia limbata and H. rigida were examined from 1986 to 1988 in four regions of an impounded lake in northern Manitoba, Canada. 2. Bottom temperatures reached 15-20-degrees-C, but ice-free periods of 4-6 months resulted in an...
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We have tested the hypothesis that H-ras transformed cells contain alterations in signal pathways important in controlling the expression of ornithine decarboxylase (ODC), the highly regulated rate-limiting activity in the biosynthesis of polyamines. Mouse 10T1/2 fibroblasts and a series of 10T1/2 H...
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Previous investigations have indicated that the suppression of proliferation by transforming growth factor (TGF) beta-1 is often lost upon cellular transformation, and that proliferation of some tumors is stimulated by TGF-beta. The present study provides the first observation of a link between TGF-...
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Seasonal sampling of sediments (May 1988-May 1989), carried out at two intertidal areas of the Queule River Estuary, was used to analyse the vertical distribution of the macroinfauna and sedimentological characteristics. In all seasons, the substratum characteristics of both areas showed small diffe...
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Naticid gastropod predators leave characteristic boreholes in the shells of their bivalve prey that allow the evaluation of spatial differences in occurrence and intensity of predation. This approach, extensively used in paleobiological research, was used to compare spatial variation in predation by...
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Traumatic brain injury (TBI) consists of two phases: an immediate phase in which damage is caused as a direct result of the mechanical impact; and a late phase of altered biochemical events that results in delayed tissue damage and is therefore amenable to therapeutic treatment. Because the molecula...
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Ornithine decarboxylase (ODC) and S-adenosylmethionine decarboxylase (SAMDC) expression was investigated in NIH-3T3 fibroblasts that secrete K-FGF. Correlations between altered ODC and SAMDC expression and malignant potential were determined. Increased ODC and SAMDC expression was associated with in...
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Emerging insects were monitored every 10 days between early May and late August 1993, from tidal pools in three coastal salt marshes on Prince Edward Island, Canada. The salt marsh pools ranged from about 1 m(2) to > 1,000 m(2) in surface area, and had salinities ranging from 11-27parts per thous...
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