Browsing Faculty of Science by Title
Now showing items 1779-1798 of 2590
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Pollen limitation of plant reproduction: Ecological and evolutionary causes and consequences
(2004-09)Determining whether seed production is pollen limited has been an area of intensive empirical study over the last two decades. Yet current evidence does not allow satisfactory assessment of the causes or consequences of ... -
A Pollen-Stratigraphic Study of Late-Quaternary Vegetational Change at Porter's Lake, Nova Scotia, with Reference to Marine Intrusion
(1986-04-15)Late-Quaternary sea level rise has caused two marine intrusions into Porter's Lake, Nova Scotia (Smith 1984), resulting in an interesting ecological history. Stratigraphic studies of the lake include work on diatoms and ... -
Polyaniline Electrode Activation in Li Cells
(The Electrochemical Society, 2020-04-17)Polyaniline (PANi) can be used as an electroactive organic cathode material in Li-cells with multiple redox states. The theoretical specific capacity of the emeraldine base (PEB) is 150 mAh g−1. In this study, we show how ... -
Polynomials Related to Expansions of Certain Rational Functions in 2 Variables
(1988-03)No abstract available. -
Polytropic model fits to the globular cluster NGC 2419 in Modified Newtonian Dynamics
(2011-10-18)We present an analysis of the globular cluster NGC 2419, using a polytropic model in Modified Newtonian Dynamics (MOND) to reproduce recently published high quality data of the structure and kinematics of the system. We ... -
A population of hot, dusty ultra-luminous galaxies at z~2
(2004-10-20)We report spectroscopic redshifts for 18 microJy-radio galaxies at mean redshift of z=2.2 that are faint at both submmillimeter (submm) and optical wavelengths. While the radio fluxes of these galaxies could indicate ... -
A Population of z > 2 Far-Infrared Herschel-Spire-selected Starbursts
(2012-12)No abstract available. -
Population Structure as Revealed by mtDNA and Microsatellites in Northern Fur Seals, Callorhinus ursinus, throughout Their Range
(2010-05)Background: The northern fur seal (Callorhinus ursinus; NFS) is a widely distributed pinniped that has been shown to exhibit a high degree of philopatry to islands, breeding areas on an island, and even to specific ... -
Population-specific gene expression responses to hybridization between farm and wild Atlantic salmon
(2009-11)Because of intrinsic differences in their genetic architectures, wild populations invaded by domesticated individuals could experience population-specific consequences following introgression by genetic material of ... -
Positive Darwinian Selection in the Piston That Powers Proton Pumps in Complex I of the Mitochondria of Pacific Salmon
(2011-09)The mechanism of oxidative phosphorylation is well understood, but evolution of the proteins involved is not. We combined phylogenetic, genomic, and structural biology analyses to examine the evolution of twelve mitochondrial ... -
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Post-Pleistocene Sea Level Changes in the Baie Verte Estuary (Northumberland Strait) as Revealed by Foraminiferal Studies
(1980-03-15)Two cores were obtained from the Baie Verte estuary of the Northumberland Strait to study relative sea level changes by examination of foraminiferal distributions. The base of the cores contained a layer of salt marsh ... -
Potential for anthropogenic disturbances to influence evolutionary change in the life history of a threatened salmonid
(2008-05)Although evolutionary change within most species is thought to occur slowly, recent studies have identified cases where evolutionary change has apparently occurred over a few generations. Anthropogenically altered ... -
A Potential Tool to Support the Prioritization of Blue Carbon Ecosystems in Canada
(2021-12)Globally, climate change and various anthropogenic activities have contributed to a significant decline in blue carbon ecosystems over the past few decades. These ecosystems can be prolific at accumulating and sequestering ... -
Poverty Among Senior Citizens - A Canadian Success Story
(John Deutsch Institute for the Study of Economic Policy, Queen's University, Kingston, 2001)