Results 261 to 270 of about 1,139,090 (295)

Stimulation of Insulin Release by Elevated Pressure Gradient

Endocrinology, 1976
In an attempt to stimulate the contractile events which presumably lead to intracellular translocation and exocytosis of the beta granule, the effect of elevated pressure on the rate of insulin release was studied. In vitro preparations of pancreas were incubated in media of low glucose content (1.65 mM) for several consecutive 15 min periods.
H, Aleyassine, R J, Gardiner
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Elevation gradients

2009
Abstract There are striking changes in vegetation from lowlands to high mountain-tops, similarly to that from the Equator towards the poles. These changes entail a reduction in the structural and floristic diversity of ecosystems and a reduction in biomass from the tall lowland forests to low stature alpine heaths, or arctic tundra.
Laszlo Nagy, Georg Grabherr
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Soil Mercury Along an Elevation Gradient in Northern Borneo

2023
The biogeochemical cycling of mercury (Hg) is an important topic of study due to the health implications of the release of this toxic element in the environment. Tropical ecosystems have been understudied, and examining elevational gradients can provide insights into mechanisms controlling soil Hg concentrations.
Brearley, Francis Q., Sellan, Giacomo, McKendry, David, Sumail, Sukaibin, van der Ent, Antony   +4 more
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Does allochthony in lakes change across an elevation gradient?

Ecology, 2015
Ecosystems are subsidized with inputs of mass and energy from their surroundings. These allochthonous inputs regulate many ecosystem characteristics. In inland waters, terrestrial inputs of organic matter regulate food‐web structure, ecosystem metabolism, water clarity, and thermal stratification.
Kevin C, Rose, Craig E, Williamson, Carrie E H, Kissman, Jasmine E, Saros   +3 more
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The Distribution of Insects along Elevational Gradients

Oikos, 1990
The distribution of insects along elevational gradients is controversial. Recent longterm sampling studies have concluded that mid-elevational peaks in species richness identified previously may have come from the short-term sampling regimes employed, and from disturbance at lower elevations.
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ELEVATIONAL GRADIENTS IN DIVERSITY OF SMALL MAMMALS

Ecology, 2005
(Uploaded by Plazi for the Bat Literature Project) A global analysis of elevational diversity trends for nonvolant small mammals revealed a clear pattern of mid-elevational peaks in species richness. Fifty-six data sets were used to test the predictions of a null model (the mid-domain effect) and climatic hypotheses.
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Elevational gradient in the cyclicity of a forest‐defoliating insect

Population Ecology, 2012
AbstractObserved changes in the cyclicity of herbivore populations along latitudinal gradients and the hypothesis that shifts in the importance of generalist versus specialist predators explain such gradients has long been a matter of intense interest. In contrast, elevational gradients in population cyclicity are largely unexplored.
Kyle J. Haynes, Andrew M. Liebhold, Derek M. Johnson   +2 more
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The elevation gradient of lichen species richness in Nepal

The Lichenologist, 2009
AbstractThis study of elevation gradients of lichen species richness in Nepal aimed to compare distribution patterns of different life-forms, substratum affinities, photobiont types, and Nepalese endemism. Distribution patterns of lichens were compared with elevational patterns shown by a wide range of taxonomic groups of plants along the Nepalese ...
Chitra Bahadur BANIYA, Torstein SOLHØY, Yngvar GAUSLAA, Michael W. PALMER   +3 more
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A theoretical study of the optimization of gradients at elevated temperature

Journal of Separation Science, 2001
In order to achieve fast chromatographic separations of unknown entities, very rapid gradients need to be performed. We have studied the influence of temperature on such rapid gradient separations carried out under reversed phase conditions. The tool by which the quality of a gradient separation is measured is the peak capacity.
Uwe D. Neue, Jeff R. Mazzeo
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Tree growth response along an elevational gradient

2013
Environment and genetics combine to influence tree growth and should therefore be jointly considered when evaluating forest responses in a warming climate. Here, we combine dendroclimatology and population genetic approaches with the aim of attributing climatic influences on growth of European larch (Larix decidua) and Norway spruce (Picea abies ...
King, G. M., Gugerli, F., Fonti, P., Frank, D. C.   +3 more
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