Results 1 to 10 of about 9,041,918 (353)

Ribosomal DNA spacer-length polymorphisms in barley: mendelian inheritance, chromosomal location, and population dynamics.

open access: yesProceedings of the National Academy of Sciences of the United States of America, 1984
Spacer-length (sl) variation in ribosomal RNA gene clusters (rDNA) was surveyed in 502 individual barley plants, including samples from 50 accessions of cultivated barley, 25 accessions of its wild ancestor, and five generations of composite cross II ...
M. Saghai-Maroof   +3 more
semanticscholar   +1 more source

Mapping adolescent sexual and reproductive health research in sub-Saharan Africa: protocol for a scoping review

open access: yesBMJ Open, 2020
Introduction Previous studies have attempted to review the vast body of evidence on adolescent sexual and reproductive health (ASRH), but none has focused on a complete mapping and synthesis of the body of inquiry and evidence on ASRH in sub-Saharan ...
Anthony Idowu Ajayi   +6 more
doaj   +1 more source

Virus–virus interactions impact the population dynamics of influenza and the common cold

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2019
Significance When multiple pathogens cocirculate this can lead to competitive or cooperative forms of pathogen–pathogen interactions. It is believed that such interactions occur among cold and flu viruses, perhaps through broad-acting immunity, resulting
S. Nickbakhsh   +10 more
semanticscholar   +1 more source

Modeling and forecasting sex differences in mortality: a sex-ratio approach

open access: yesGenus, 2018
Female and male life expectancies have converged in most industrialized societies in recent decades. To achieve coherent forecasts between females and males, this convergence needs to be considered when forecasting sex-specific mortality.
Marie-Pier Bergeron-Boucher   +3 more
doaj   +1 more source

Population dynamics of normal human blood inferred from somatic mutations

open access: yesNature, 2018
Haematopoietic stem cells drive blood production, but their population size and lifetime dynamics have not been quantified directly in humans. Here we identified 129,582 spontaneous, genome-wide somatic mutations in 140 single-cell-derived haematopoietic
H. Lee-Six   +15 more
semanticscholar   +1 more source

Potential gains in life expectancy by reducing inequality of lifespans in Denmark: an international comparison and cause-of-death analysis

open access: yesBMC Public Health, 2018
Background Reducing lifespan inequality is increasingly recognized as a health policy objective. Whereas lifespan inequality declined with rising longevity in most developed countries, Danish life expectancy stagnated between 1975 and 1995 for females ...
José Manuel Aburto   +3 more
doaj   +1 more source

Long-term stability of cortical population dynamics underlying consistent behavior

open access: yesNature Neuroscience, 2019
Animals readily execute learned behaviors in a consistent manner over long periods of time, and yet no equally stable neural correlate has been demonstrated. How does the cortex achieve this stable control?
J. A. Gallego   +4 more
semanticscholar   +1 more source

Inferring single-trial neural population dynamics using sequential auto-encoders

open access: yesNature Methods, 2017
Neuroscience is experiencing a revolution in which simultaneous recording of thousands of neurons is revealing population dynamics that are not apparent from single-neuron responses.
C. Pandarinath   +13 more
semanticscholar   +1 more source

Discreteness effects in population dynamics [PDF]

open access: yesJournal of Physics A: Mathematical and Theoretical, 2016
We analyse numerically the effects of small population size in the initial transient regime of a simple example population dynamics. These effects play an important role for the numerical determination of large deviation functions of additive observables for stochastic processes.
Guevara Hidalgo, Esteban   +1 more
openaire   +7 more sources

Thirst regulates motivated behavior through modulation of brainwide neural population dynamics

open access: yesScience, 2019
Neuron activity across the brain How is it that groups of neurons dispersed through the brain interact to generate complex behaviors? Three papers in this issue present brain-scale studies of neuronal activity and dynamics (see the Perspective by Huk and
William E. Allen   +6 more
semanticscholar   +1 more source

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