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Altered functioning of the glutamate system during critical periods of development is believed to play a role in various neurodevelopmental disorders, such as schizophrenia. Prepulse inhibition (PPI) of the acoustic startle response is deficient in people with schizophrenia. This study investigated ...
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This paper (only an abstract of which is given) was presented at the Sixteenth Annual Meeting of the Society of Nematologists held at East Lansing, Michigan, from 16 to 19 August 1977. An account is given of studies carried out in Canada on the effect of parasitism by the mermithid nematode Neomesom...
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This study presents a survey of the species of the Araceae where extracellular production of calcium oxalate crystals has been observed and discusses the patterns of production of the crystals in different genera. For all Araceae studied using SEM, the oxalate crystals exuding on the epidermal surfa...
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R. culicivorax juveniles were dissected out of Aedes aegypti larvae 7 days after infection and incubated under controlled conditions in isotonic saline containing a 14C-labelled fatty acid (palmitic acid), monoacylglycerol (glycerol monoolein), or triacylglycerol (glycerol tripalmitate) nutrient sou...
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Analyzes predictions made by previous allometric analyses of the relationship between population density and body mass. Ecological density of terrestrial mammal populations; Effect of trophic groups and body sizes of community members and the range of sizes; Energy use of herbivores, carnivores, and...
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A phylogeny has been inferred from parsimony and likelihood analyses of plastid rbcL DNA sequences for seven recognized and six undescribed species of Gracilariopsis (Gp.) (Gracilariales, Rhodophyta). New descriptions and illustrations of cystocarp morphology are provided for four Gracilariopsis spe...
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Analogues of adenosine were injected intrathecally into rats implanted with chronic indwelling cannulae in order to determine a rank order of potency and hence characterize adenosine receptors involved in spinal antinociception. In the tail flick test L-N6-phenylisopropyl adenosine (L-PIA), cyclohex...
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The responses of shortfin eel (Anguilla australis) to discharges from two pulp and paper mills, municipal wastewater, and a geothermal power plant wastewater were examined. Eels were caged at 3 sites along the Tarawera River, North Island, New Zealand, to explore effects of a 3-wk exposure down a co...
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Ribonucleotide reductase is a highly regulated activity responsible for reducing ribonucleotides to deoxyribonucleotides, which are required for DNA synthesis and DNA repair. We have tested the hypothesis that malignant cell populations contain alterations in signal pathways important in controlling...
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The presence of unidentified estrogens and androgens in effluents from pulp and paper mills is well documented. However, their role in effluent effects on fish reproduction remains unclear. The objective of this study was to investigate the hypothesis that reproductive impacts of a modern pulp mill ...
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Little is known about the small mammalian fauna of Prince Edward Island (Canada), particularly shrews. Although historical data indicate the presence of five shrew species on Prince Edward Island (Sorex cinereus, S. fumeus, S. hoyi, S. palustris and Blarina brevicauda), recent studies have failed to...
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Two experiments using rainbow trout (Oncorhynchus mykiss) were conducted to examine the combined effects of energy intake as manipulated by ration and pulp and paper mill effluent exposure over either one, or two consecutive reproductive cycles. This study demonstrated that the level of energy intak...
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Eggs (0-24 h old and 48-72 h old) of Choristoneura fumiferana were treated topically with fenoxycarb dissolved in acetone. Only 25% of treated eggs hatched, compared to 90% of control eggs. Survival of larvae from treated eggs to induction of diapause in the 2nd instar, and of diapausing larvae, was...
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This is the first report of materials representing the "Falkenbergia" stage of the tropical marine red alga, Asparagopsis taxiformis (Delile) Trevisan from the Philippines. Information on the morphology and geographical distribution of both gametophytic and sporophytic stages are presented...
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The acute lethality of low dissolved oxygen (DO) was examined in laboratory studies using several New Zealand freshwater fish and two invertebrates at 15 degree C. The 48-h LC sub(50) value was used as the endpoint for acute DO sensitivity as, owing to rapid mortality, this was found to best approxi...
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A method for obtaining algal chromosomal preparations is described employing the Fuelgen method for DNA staining, Fe-propionocarmine as an enhancing stain, and cupra-ammonium to remove cell wall material. Fe-propionocarmine applied as a gradient to the slide provides cells stained with the Feulgen s...
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Sewage effluent application to land is a treatment technology that requires appropriate consideration of various design factors. Soil type, level of sewage pre-treatment and irrigation rate were assessed for their influence on the success of soil treatment in removing pharmaceuticals remaining after...
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During metamorphosis, the tadpole neuroendocrine brain is a major target for the organisational effects of hormones acting via both endocrine feedback mechanisms and local hormone production. While the receptor-mediated actions of thyroid hormones in brain development have been well described, there...