Results

51 - 75 of 634
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The relationship between S. purpurea and its inquilines in northeastern North America is reviewed. Wyeomyia smithii, Metriocnemus knabi and Blaesoxipha fletcheri dominate the insect community of S. purpurea. All 3 are detritivores and feed on the arthropod prey attracted to the pitcher plant. They c...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Isocitrate lyase and malate synthetase, key enzymes of the glyoxylate cycle, were present in postparasites of R. culicivorax. Specific activities of enzymes were higher in adult postparasites than in newly emerged juveniles. Isocitrate lyase had a well-defined pH optimum (7.5), whereas malate synthe...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Rev. of Achieving Sustainable Freshwater Systems: A Web of Connections, edited by Marjorie M. Holland, Elizabeth R. Blood and Lawrence R. Shaffer.
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Matrix metalloproteinase expression was examined in a series of mammalian cell lines of varying degrees of malignant progression, The expression of MMP-2 and MMP-9 was found to correlate with ras-mediated cellular transformation and as a function of malignant potential. Altered MMP-2 and MMP-9 expre...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
This study examined the potential biological hazard of pulp and paper waste solids. The solids examined were chosen on the basis of the range of wood-related organic extractives and were either primary solids screened from the effluent stream before secondary treatment, or biosolids from aerated sta...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The collapse of the cod fishery in Newfoundland has coincided with marked increases in abundances of snow crab, pandalid shrimp, and other crustaceans that prey on sedimentary infauna. A 3-year sampling program in Bonne Bay, Newfoundland indicates differences in composition and number of these preda...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The haemolymph of larvae of Prosimulium mixtum Syme & Davies/P. fuscum Syme & Davies and Simulium venustum Say parasitised by the mermithid nematode Neomesomermis flumenalis was compared with that of unparasitised hosts with respect to protein, amino acid and carbohydrate composition. The me...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The identity and role of G proteins in coupling adenosine receptors to effectors have been studied to a limited degree. We have identified the G proteins whose GTPase activity is stimulated by adenosine receptor agonists in neuronal membranes. (R)-Phenylisopropyladenosine, 2-chloroadenosine, and N-e...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
We investigated the reproductive morphology of representative material corresponding to the type species of each of the described genera presently placed in synonymy under Gracilaria. From these observations and published studies of recognized genera, 10 species groups are identified in the Gracilar...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The reduction of ribonucleotides to deoxyribonucleotides, a rate-limiting step in DNA synthesis, is catalyzed by ribonucleotide reductase. This enzyme is composed of two components, M1 and M2. Recent work has shown that inhibition of ribonucleotide reductase by the antitumor drug hydroxyurea leads t...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Early 6th-instar larvae of Choristoneura fumiferana were topically treated with the juvenile hormone analogue fenoxycarb, and fat bodies were isolated at varying times post-treatment for metabolic studies. Fenoxycarb impaired lipid synthesis by the fat bodies, suppressing both the synthesis of fatty...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The objective of the present study was to investigate the influence of chronic exposure to municipal sewage treatment effluent at environmentally relevant concentrations on immune parameters in rainbow trout (Oncorhynchus mykiss), including the assessment of potential differences in reactivity betwe...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Chemicals released into the environment by anthropogenic activities have been linked to estrogenic or androgenic effects in exposed wildlife, and there is a need to develop and validate rapid and cost-effective methods to quantify the total estrogenic and androgenic activity of environmental water s...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
In the mid 1970s, Manitoba Hydro impounded Southern Indian Lake (SIL) and diverted much of the flow of the Churchill River, which flowed through SIL, into the Nelson River Catchment for hydroelectric power generation. A dramatic decline in burrowing mayfly (Hexagenia ) populations following lake man...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
Alterations in cellular growth are important in the progression of malignant disease. Cell growth regulation by tumour promoters can be complex. The present study demonstrates a novel link between alterations in phorbol ester tumour promoter mediated regulation during malignant conversion and the ex...
[Page generation failure. The bibliography processor requires a browser with Javascript enabled.]
The nervous system of the mermithid nematode Romanomermis culicivorax was investigated at different developmental stages for the distribution of catecholamine(s). The catecholamines nervous system increased in complexity during development..