نتایج جستجو برای: island structure
تعداد نتایج: 1618707 فیلتر نتایج به سال:
Molecular beam epitaxy is an important method for growing thinlms and nanostructures. One of the scienti c challenges is to understand the fundamental processes that control the evolution of thin lm structure and morphology. The results of kinetic Monte Carlo simulations carried out to study the dependence of the submonolayer scaled island-size distribution on the critical island-size are prese...
Fifteen guanacos were introduced to Staats Island in the Falklands/Malvinas archipelago from Patagonia in the 1930s. Twenty five years later, the population was culled from 300 to 10-20 individuals, but quickly rebounded to a population of almost 400 animals that today retain the genetic signature of the founding event and later bottleneck. The goals of this study were to (i) make a genetic ass...
Geological processes and ecological adaptation are major drivers of diversification on oceanic islands. Although diversification in these islands is often interpreted as resulting from dispersal or island hopping rather than vicariance, this may not be the case in islands with complex geological histories. The island of Tenerife, in the Canary Islands, emerged in the late Miocene as 3 precursor...
CANADA. J. Parnell, G.R. Osinski, P. Lee, M. Baron, M. J. Pearson and M. Feely, Dept. of Geology & Petroleum Geology, University of Aberdeen, Aberdeen AB24 3UE, U.K., [email protected]), Dept. of Geology, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada, SETI Institute, NASA Ames Research Center, Moffett Field, CA 94035-1000, U.S.A., 4 Dept. of Geology, NUI Galway, Rep...
Developing sustainable island tourism must be thoroughly evaluated in consideration of ecological, economic, and social factors on account of the fragility of island ecosystems. This study evaluated the ecological footprint (EF) and ecological capacity of Liuqiu Island from 2010 to 2015 using the EF model, establishing an indicator to estimate the value of ecosystem service and eco-security. Th...
The cynomolgus macaque, Macaca fascicularis, was introduced onto the island of Mauritius in the early 17(th) century. The species experienced explosive population growth, and currently exists at high population densities. Anecdotes collected from nonhuman primate trappers on the island of Mauritius allege that animals from the northern portion of the island are larger in body size than and supe...
The neutral island model forms the basis for several estimation models that relate patterns of genetic structure to microevolutionary processes. Estimates of gene flow are often based on this model and may be biased when the model's assumptions are violated. An appropriate test for violations is to compare FST scores for individual loci to a null distribution based on the average FST taken over...
BACKGROUND cag pathogenicity island (PAI) is reported to be a major virulence factor of Helicobacter pylori. AIM To characterise cagA and the cag PAI in Japanese H pylori strains. METHODS H pylori isolates from Japanese patients were evaluated for CagA by immunoblot, for cagA transcription by northern blot, and for cagA and 13 other cag PAI genes by Southern blot. cagA negative strains from...
Little is known about the possible influence that past glacial events have had on the phylogeography and population structure of avian predators in the Arctic and sub-Arctic. In this study, we use microsatellite and mitochondrial control region DNA variation to investigate the population genetic structure of gyrfalcons (Falco rusticolus) throughout a large portion of their circumpolar distribut...
asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...
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