Results 121 to 130 of about 1,099,013 (383)
Decline in extinction rates and scale invariance in the fossil record
, 1998 We show that the decline in the extinction rate during the Phanerozoic can be accurately parameterized by a logarithmic fit to the cumulative total extinction. This implies that extinction intensity is falling off approximately as the reciprocal of time.
Eble, Gunther J., Newman, M. E. J.
core +2 more sources
, 2017 Understanding the effects of dust extinction is important to properly interpret observations. The optical total-to-selective extinction ratio, Rv = Av/E(B-V), is widely used to describe extinction variations in ultraviolet and optical bands. Since the Rv=
Chen, Xiaodian +4 more
core +2 more sources
Advanced Functional Materials, EarlyView.The side‐chain configuration in the bay region of C‐shaped ortho‐benzodipyrrole‐based non‐fullerene acceptors plays a crucial role in their self‐assembly, single‐crystal structures, and optoelectronic properties. The closely correlated molecular structure and performance underscore the importance of minimizing A–A self‐aggregation and enhancing D–A ...
Yung‐Jing Xue +18 more
wiley +1 more source
Journal of Threatened Taxa, 2015 We reviewed the local current status and summarized the suspected causes of rarity, and presumed major threats to the 84 rarest bird speciesin the state of Rio de Janeiro, southeastern Brazil.
Francisco Mallet-Rodrigues +1 more
doaj +1 more source
Reddening Behaviors of Galaxies in the SDSS Photometric System
, 2008 We analyze the behaviors of reddening vectors in the SDSS photometric system for galaxies of different morphologies, ages, and redshifts. As seen in other photometric systems, the dependence of reddening on the spectral energy distribution (SED) and the ...
Grebel E. K. +2 more
core +1 more source
Recognizing the quiet extinction of invertebrates
Nature Communications, 2019 Invertebrates are central to the functioning of ecosystems, yet they are underappreciated and understudied. Recent work has shown that they are suffering from rapid decline.
N. Eisenhauer, A. Bonn, Carlos A. Guerra
semanticscholar +1 more source
Bimetallic Nanoparticles as Cocatalysts for Photocatalytic Hydrogen Production
Advanced Functional Materials, EarlyView.Recent developments have introduced bimetallic nanoparticles as effective cocatalysts for photocatalytic systems. This review explores the rapidly expanding research on bimetallic cocatalysts for photocatalytic production of hydrogen, emphasizing the creation of carrier‐selective contacts, localized surface plasmon resonance effects, methodologies for ...
Yufen Chen +4 more
wiley +1 more source
Frontiers in Marine Science, 2017 Ecological research in recent decades revealed that species loss has a predominantly negative effect on ecosystem functioning and stability. Most of these studies were based on random species loss scenarios, but extinctions in nature are not random ...
Friederike G. Engel +3 more
doaj +1 more source
Extinction rates of established spatial populations
, 2011 This paper deals with extinction of an isolated population caused by intrinsic noise. We model the population dynamics in a "refuge" as a Markov process which involves births and deaths on discrete lattice sites and random migrations between neighboring ...
A. S. Mikhailov +8 more
core +1 more source
Diet-induced extinction in the gut microbiota compounds over generations
Nature, 2015 The gut is home to trillions of microorganisms that have fundamental roles in many aspects of human biology, including immune function and metabolism.
E. Sonnenburg +5 more
semanticscholar +1 more source