Results 61 to 70 of about 14,125,984 (386)

Two aspects of longevity are associated with rates of loss of telomeres in birds

Ecology and Evolution, 2022
Telomeres, the terminal repetitive DNA sequences at the ends of linear chromosomes, have strong associations with longevity in some major taxa. Longevity has been linked to rate of decline in telomere length in birds and mammals, and absolute telomere ...
F. Stephen Dobson, Quentin Schull, François Criscuolo   +2 more
doaj   +1 more source

Asymmetric thinning of the cerebral cortex across the adult lifespan is accelerated in Alzheimer’s disease

Nature Communications, 2020
Aging and Alzheimer’s disease (AD) are associated with progressive brain disorganization. Although structural asymmetry is an organizing feature of the cerebral cortex it is unknown whether continuous age- and AD-related cortical degradation alters ...
James M. Roe, D. Vidal-Piñeiro, Øystein Sørensen, A. Brandmaier, Sandra Düzel, Hector A. Gonzalez, R. Kievit, E. Knights, S. Kühn, U. Lindenberger, A. Mowinckel, L. Nyberg, Denise C. Park, Sara Pudas, M. Rundle, K. Walhovd, A. Fjell, R. Westerhausen, Colin L. Ashley I. Christopher David Kelly Carolina Blai Masters Bush Fowler Darby Pertile Restrepo Roberts, C. Masters, A. Bush, Christopher Fowler, D. Darby, K. Pertile, Carolina Restrepo, Blaine R. Roberts, J. Robertson, Rebecca L. Rumble, Tim M. Ryan, S. Collins, Christine Thai, Brett O. Trounson, K. Lennon, Qiao-Xin Li, Fernanda Yevenes Ugarte, I. Volitakis, M. Vovos, Robert Williams, Jenalle E. Baker, Alyce Russell, M. Peretti, Lidija Milicic, Lucy Lim, M. Rodrigues, K. Taddei, T. Taddei, Eugene Hone, Florence Lim, Shane Fernandez, Stephanie Rainey-Smith, S. Pedrini, Ralph M. Martins, J. Doecke, P. Bourgeat, J. Fripp, Simon Gibson, Hugo Leroux, David Hanson, V. Doré, Ping Zhang, S. Burnham, C. Rowe, V. Villemagne, P. Yates, Sveltana Bozin Pejoska, Gareth Jones, D. Ames, E. Cyarto, N. Lautenschlager, K. Barnham, Lesley Cheng, Andrew Hill, N. Killeen, P. Maruff, B. Silbert, B. Brown, Harmid Sohrabi, G. Savage, M. Vacher   +78 more
semanticscholar   +1 more source

Estimates of lifespan and blow-up rates for the wave equation with a time-dependent damping and a power-type nonlinearity [PDF]

Funkcial. Ekvac. 62 (2019), no.2, 157--189, 2016
We study blow-up behavior of solutions for the Cauchy problem of the semilinear wave equation with time-dependent damping. When the damping is effective, and the nonlinearity is subcritical, we show the blow-up rates and the sharp lifespan estimates of solutions.
arxiv   +1 more source

A process-based model of conifer forest structure and function with special emphasis on leaf lifespan [PDF]

, 2002
We describe the University of Sheffield Conifer Model (USCM), a process-based approach for simulating conifer forest carbon, nitrogen, and water fluxes by up-scaling widely applicable relationships between leaf lifespan and function. The USCM is designed
Aerts, Amthor, Amthor, Atkin, Axelrod, Axelrod, Beerling, Beerling, Beerling, Beerling, Beerling, Beerling, Beerling, Bernacchi, Berner, Betts, Bonan, Bonan, Bonan, Bond, Bruniquel-Pinel, Carey, Chabot, Chaloner, Chanzy, Chen, Chen, Chen, Chen, Chen, Chung, Clothier, Coley, Colin P. Osborne, Collatz, Connor, Cramer, Cramer, Creber, Crowley, David J. Beerling, de Pury, DeLucia, Douglas, Douville, Drake, Drake, Ekart, Ellsworth, Falcon-Lang, Falcon-Lang, Falcon-Lang, Falcon-Lang, Farquhar, Fassnacht, Ferrier, Foley, Francis, Francis, Friedlingstein, Gholz, Givnish, Gordon, Goulden, Gower, Gower, Granier, Granier, Greenwood, Grier, Harley, Haxeltine, Hollinger, Hollinger, Jarvis, Jefferson, Jones, Kajimoto, Katul, Kelliher, Kinerson, Kothavala, Körner, Lambers, Leuning, Levis, Liu, Long, Lumb, Markwick, McCormick, McElwain, McGuire, McGuire, Megonigal, Moncrieff, Monteith, Murty, New, New, Näsholm, Olmo, Oren, Osborne, Osborne, Otto-Bliesner, Parton, Penman, Penning de Vries, Poorter, Poorter, Raich, Raich, Rambal, Rapp, Read, Read, Reich, Reich, Reich, Reich, Reich, Reich, Roderick, Runyon, Rustad, Ryan, Ryan, Ryan, Schiller, Schlesinger, Schulze, Schulze, Schulze, Sellers, Sellers, Seward, Shaw, Shugart, Shuttleworth, Sollins, Spicer, Spicer, Spicer, Steele, Striegl, Szaniawski, Tamai, Taylor, Thomas, Thornley, Thornley, van Cleve, Vitousek, Vogt, Vogt, Walcroft, Weiss, Weiss, White, Williams, Wilson, Wilson, Wirth, Woodward, Woodward, Woodward, Woodward   +167 more
core   +1 more source

Ethylene‐regulated leaf lifespan explains divergent responses of plant productivity to warming among three hydrologically different growing seasons

Global Change Biology, 2021
Leaf senescence is known to be regulated by the plant hormone ethylene, but how leaf lifespan responds to global environmental change and links to ecosystem‐level responses remains largely unexplored.
Haiyan Ren, G. Han, Maihe Li, Cuiping Gao, Lin Jiang   +4 more
semanticscholar   +1 more source

Structural Brain Network Changes across the Adult Lifespan [PDF]

Frontiers in Aging Neuroscience, 2017
A number of magnetic resonance imaging (MRI) studies have shown age-related alterations in brain structural networks in different age groups. However, the specific age-associated changes in brain structural networks across the adult lifespan is underexplored.
Ke Liu, Shixiu Yao, Kewei Chen, Kewei Chen, Kewei Chen, Jiacai Zhang, Li Yao, Li Yao, Ke Li, Zhen Jin, Xiaojuan Guo, Xiaojuan Guo   +11 more
openaire   +4 more sources

Effects of Increased Flight on the Energetics and Life History of the Butterfly Speyeria mormonia. [PDF]

PLoS ONE, 2015
Movement uses resources that may otherwise be allocated to somatic maintenance or reproduction. How does increased energy expenditure affect resource allocation?
Kristjan Niitepõld, Carol L Boggs
doaj   +1 more source

Meta-analysis of quantitative sleep parameters from childhood to old age in healthy individuals: developing normative sleep values across the human lifespan.

Sleep, 2004
OBJECTIVES The purposes of this study were to identify age-related changes in objectively recorded sleep patterns across the human life span in healthy individuals and to clarify whether sleep latency and percentages of stage 1, stage 2, and rapid eye ...
M. Ohayon, M. Carskadon, C. Guilleminault, M. Vitiello   +3 more
semanticscholar   +1 more source

Multiscale cortical morphometry reveals pronounced regional and scale-dependent variations across the lifespan [PDF]

arXiv, 2023
Motivation: Characterising the changes in cortical morphology across the lifespan is fundamental for a range of research and clinical applications. Most studies to date have found a monotonic decrease in commonly used morphometrics, such as cortical thickness and volume, across the entire brain with increasing age.
arxiv  

A recipe for accurate estimation of lifespan brain trajectories, distinguishing longitudinal and cohort effects

NeuroImage, 2021
We address the problem of estimating how different parts of the brain develop and change throughout the lifespan, and how these trajectories are affected by genetic and environmental factors.
Øystein Sørensen, Kristine B. Walhovd, Anders M. Fjell   +2 more
doaj