Results 81 to 90 of about 1,146,667 (380)
Distinct hippocampal engrams control extinction and relapse of fear memory
Nature Neuroscience, 2019 Learned fear often relapses after extinction, suggesting that extinction training generates a new memory that coexists with the original fear memory; however, the mechanisms governing the expression of competing fear and extinction memories remain ...
A. Lacagnina +9 more
semanticscholar +1 more source
Defect Analysis of the β– to γ–Ga2O3 Phase Transition
Advanced Functional Materials, EarlyView.The role of defects at all the relevant stages of the β$\beta$‐ to γ$\gamma$‐Ga2O3 polymorph transition is investigated using a multi method approach. The positron annihilation spectroscopy based results show that the defect density decreases after the transition, and that changes in defect configuration within the γ phase occur with increasing ...
Umutcan Bektas +9 more
wiley +1 more source
Adaptation, Plasticity, and Extinction in a Changing Environment: Towards a Predictive Theory
PLoS Biology, 2010 The authors analyze developmental, genetic, and demographic mechanisms by which populations tolerate changing environments and discuss empirical methods for determining the critical rate of sustained environmental change that causes population extinction.
Luis‐Miguel Chevin, R. Lande, G. Mace
semanticscholar +1 more source
DENTA: A Dual Enzymatic Nanoagent for Self‐Activating Tooth Whitening and Biofilm Disruption
Advanced Functional Materials, EarlyView.The nanoapatite with dual enzymes (DENTA) accumulates in dentinal tubules, reducing hypersensitivity caused by dental nerve exposure and facilitating continuous ROS generation through salivary glucose for effective, long‐term whitening. The dentin structures remain non‐destructive due to the low concentration of ROS, demonstrating excellent cell ...
Junseok Kim +13 more
wiley +1 more source
Interstellar Extinction Law toward the Galactic Center II: V, J, H, and Ks Bands [PDF]
, 2008 We have determined the ratios of total to selective extinction directly from observations in the optical V band and near-infrared J band toward the Galactic center.
Hirofumi Hatano +7 more
core +1 more source
Survival of small populations under demographic stochasticity [PDF]
, 1992 We estimate the mean time to extinction of small populations in an environment with constant carrying capacity but under stochastic demography. In particular, we investigate the interaction of stochastic variation in fecundity and sex ratio under several
Bell +24 more
core +1 more source
Evolutionary Applications, 2016 Hybridization may drive rare taxa to extinction through genetic swamping, where the rare form is replaced by hybrids, or by demographic swamping, where population growth rates are reduced due to the wasteful production of maladaptive hybrids. Conversely,
M. Todesco +10 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.This work presents self‐propelled CRISPR/Cas9‐functionalized Au–MRs for rapid, amplification‐free, “on‐the‐fly” DNA detection. By harnessing motion‐assisted signal recovery, the platform achieved the limit of detection in low fM DNA concentrations, enabling detection across a wide dynamic range within only 5 min, which is significantly faster than any ...
Jyoti +3 more
wiley +1 more source
Advertencias del panel intergubernamental del cambio climático
Revista de Economía Institucional, 2021 Juan Bordera +5 more
doaj +1 more source
Frontiers in Plant Science, 2020 There was a wave of whole genome duplications (WGD) during and subsequent to the K-Pg interface, which was followed by an increase in the proportion of species that were polyploid.
Donald A. Levin
doaj +1 more source