Results 11 to 20 of about 11,541,343 (347)
Background Pediatric high-grade gliomas (pHGGs) are among the most common and incurable malignant neoplasms of childhood. Despite aggressive, multimodal treatment, the outcome of children with high-grade gliomas has not significantly improved over the ...
Malcolm K Brenner+15 more
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Mitochondrial gene flow. [PDF]
To account for the transmission of mitochondrial DNA between conspecific species Drosophila pseudoobscura and D. persimilis in sympatry reported by J.R. Powell [Powell, J.R. (1983) Proc. Natl. Acad. Sci. USA 80, 492-495], a simple model of gene flow and selection in infinite populations is analyzed.
Montgomery Slatkin, Naoyuki Takahata
openaire +3 more sources
Pollen production and dispersion in Pinus roxburghii [PDF]
Pollen dispersion and frequency of flowering were studied in the natural population of Pinus roxburghii Sargent (Chir pine) at altitudes between 1600 and 1900 m above sea level in the Tehri forest division of Garhwal Himalaya.
Vinod Prasad Khanduri
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How often do they meet? Genetic similarity between European populations of a potential disease vector Culex pipiens [PDF]
Background: Species in the Culex pipiens complex are common almost all over the world and represent important vectors for many serious zoonotic diseases. Even if, at the moment, many of the pathogens potentially transmitted by Cx.
Mare Lõhmus+2 more
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Anthropogenic Habitats Facilitate Dispersal of an Early Successional Obligate: Implications for Restoration of an Endangered Ecosystem [PDF]
Landscape modification and habitat fragmentation disrupt the connectivity of natural landscapes, with major consequences for biodiversity. Species that require patchily distributed habitats, such as those that specialize on early successional ecosystems,
Amaral, Katrina E.+4 more
core +14 more sources
Chronic pancreatitis, a known risk factor for the development of pancreatic ductal adenocarcinoma (PDA), is a serious, widespread medical condition characterized by inflammation, fibrosis, and acinar to ductal metaplasia (ADM).
Kathleen E. DelGiorno+9 more
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Genetic diversity and structure of baobab (Adansonia digitata L.) in southeastern Kenya [PDF]
Baobab (Adansonia digitata L.) is an iconic tree of African savannahs. Its multipurpose character and nutritional composition of fruits and leaves offer high economic and social potential for local communities. There is an urgent need to characterize the
Anna Chládová+7 more
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Genomic signatures of host-associated divergence and adaptation in a coral-eating snail, Coralliophila violacea (Kiener, 1836). [PDF]
The fluid nature of the ocean, combined with planktonic dispersal of marine larvae, lowers physical barriers to gene flow. However, divergence can still occur despite gene flow if strong selection acts on populations occupying different ecological niches.
Barber, Paul H+4 more
core +1 more source
Exogenous genes of transgenic crops are usually transferred to their wild-type relatives through pollen-mediated gene flow, which may change the ecological fitness and ability to invade wild populations, resulting in the weeding of wild plants and other ...
Laipan Liu+10 more
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Cryptolepis sanguinolenta is an important medicinal plant used in the treatment of malaria in Ghana. Overharvesting, destruction of entire plant populations and poor seed viability have resulted in a substantial decrease in wild populations thereby ...
Jacqueline Naalamle Amissah+3 more
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