Results 111 to 120 of about 3,161,795 (320)
Anoxia duirng the Late Permian Binary Mass Extinction and Dark Matter [PDF]
Curr.Sci.B7:1290-1292,2000, 1998 Recent evidence quite convincingly indicates that the Late Permian biotic crisis was in fact a binary extinction with a distinct end-Guadalupian extinction pulse preceding the major terminal end-Permian Tartarian event by 5 million years. In addition anoxia appears to be closely associated with each of these end-Paleozoic binary extinctions.
arxiv
Fear Conditioning and Extinction: Examining the Role of GSK3β ser 389 [PDF]
, 2016 GSK3β is a serine threonine kinase that has been shown to influence numerous biological and psychological interactions, including the regulation of cell survival and cell death, as well as influencing mood disorders such as major depressive disorder and ...
Liebman, Benjamin
core +1 more source
Traceless Photopolymerization with Non‐Pulsed Red Light Enables 3D‐Printable Cell‐Laden Hydrogels
Advanced Materials, EarlyView.The paper presents a red‐light‐induced polymerization process, initiated by the FDA‐approved dye methylene blue and the cytocompatible co‐initiator triethanolamine, for fabricating hydrogels. This photopolymerization process is oxygen‐tolerant, cytocompatible, and, most importantly, leaves no color traces, resulting in completely transparent scaffolds.
Ali Eftekhari +10 more
wiley +1 more source
A mathematical model for Neanderthal extinction [PDF]
arXiv, 1997 A simple mathematical homogeneous model of competition is used to describe Neanderthal extinction in Europe. It considers two interacting species, Neanderthals and Early Modern Men, in the same ecological niche. Using paleontological data we claim that the parameter of similarity, between both species, fluctuates between 0.992 and 0.997.
arxiv
Capillary‐Driven 3D Open Fluidic Networks for Versatile Continuous Flow Manipulation
Advanced Materials, EarlyView.The capillary‐driven 3D open fluidic networks (OFNs), composed of connected polyhedral frames, enable precise, programmable, and versatile manipulation of unary, binary, and multiple continuous flows in both spatial and temporal dimensions. OFNs represent a significant leap beyond conventional microfluidics, unlocking new possibilities for selective ...
Shuangmei Wu +4 more
wiley +1 more source
American Journal of Botany, Volume 109, Issue 12, Page 2068-2081, December 2022., 2022 Abstract Premise Approximately 14% of all fern species have physiologically active chlorophyllous spores that are much more short‐lived than the more common and dormant achlorophyllous spores. Most chlorophyllous‐spored species (70%) are epiphytes and account for almost 37% of all epiphytic ferns.
Daniela Mellado‐Mansilla +6 more
wiley +1 more source
Power Law Distribution of the Frequency of Demises of U.S Firms
, 2002 Both theoretical and applied economics have a great deal to say about many aspects of the firm, but the literature on the extinctions, or demises, of firms is very sparse.
Adelman +11 more
core +1 more source
Advanced Materials Interfaces, EarlyView.The formation of stable clusters of gold nanoparticles with oligonucleotides at different solution conditions is explored. DNA base homogeneity and strand directionality influence the binding with gold nanoparticles leading to interesting clustering behavior that can be relevant for SERS applications.
Shaila Thakur +3 more
wiley +1 more source
Elevation gradient of successful plant traits for colonizing alpine summits under climate change
Environmental Research Letters, 2013 Upward migration of plant species due to climate change has become evident in several European mountain ranges. It is still, however, unclear whether certain plant traits increase the probability that a species will colonize mountain summits or vanish ...
Magalì Matteodo +4 more
doaj +1 more source
Extinction in a branching process: Why some of the fittest strategies cannot guarantee survival [PDF]
arXiv, 2012 The fitness of a biological strategy is typically measured by its expected reproductive rate, the first moment of its offspring distribution. However, strategies with high expected rates can also have high probabilities of extinction. A similar situation is found in gambling and investment, where strategies with a high expected payoff can also have a ...
arxiv