Results 41 to 50 of about 112,775 (298)

Correlates of extinction risk in Chinese endemic birds

Avian Research, 2019
Background China has a relative high degree of endemism of birds due to its large area, diversified topography, and varied climates and habitats. Among the 77 Chinese endemic birds, 29 species are classified as threatened according to the officially ...
Chuanwu Chen, Di Zeng, Yuhao Zhao, Yiru Wu, Junfeng Xu, Yanping Wang   +5 more
doaj   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

FEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source

Vertebrates on the brink as indicators of biological annihilation and the sixth mass extinction [PDF]

Proceedings of the National Academy of Sciences, 2020
SignificanceThe ongoing sixth mass extinction may be the most serious environmental threat to the persistence of civilization, because it is irreversible. Thousands of populations of critically endangered vertebrate animal species have been lost in a century, indicating that the sixth mass extinction is human caused and accelerating.
Gerardo Ceballos, Paul R. Ehrlich, Peter H. Raven   +2 more
openaire   +2 more sources

Anti‐CD19 CAR T Cells in Autoimmune Encephalitis: Inflammation Controlled, Neurodegeneration Unchecked?

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Just recently, successful chimeric antigen receptor (CAR) T cell therapy was reported in the first patient with refractory, anti‐diacylglycerol lipase alpha (DAGLA) antibody‐mediated autoimmune encephalitis, achieving partial clinical remission.
Dimitrios Mougiakakos, Marwa Al‐Dubai, Denise Walther, Dominic Borie, Jan D. Lünemann, Marc Pawlitzki, Sven G. Meuth, Solveig Henneicke, Stefan Vielhaber, Stefanie Schreiber   +9 more
wiley   +1 more source

The Extinction and De-Extinction of Species [PDF]

, 2022
In this paper, we discuss the following four alternative ways of understanding the outcomes of resurrection biology (also known as de-extinction). Implications of each of the ways are discussed with respect to concepts of species and extinction.
Leonard Finkelman, Helena Siipi
core   +1 more source

What is Extinction? Ecopolitics of the End [version 2; peer review: 2 approved, 1 approved with reservations]

Routledge Open Research
In recent years, extinction has become something of a buzzword used to portray the state of consciousness of the epoch. Its definition as a concept, however, heavily oscillates between naturalistic, speculative, ethical and critical connotations. The aim
Gregorio Tenti
doaj   +1 more source

Global analysis of a new nonlinear stochastic differential competition system with impulsive effect

Advances in Difference Equations, 2017
We propose a new stochastic competition chemostat system with saturated growth rate and impulsive toxicant input. The main purpose of this paper is to study the stochastic dynamics of a high-dimensional impulsive stochastic chemostat model and find the ...
Xuejin Lv, Lu Wang, Xinzhu Meng
doaj   +1 more source

Intrinsic Photoactive Star ZnPc–Poly(glutamate) Nanoplatforms for Multimodal Glioblastoma Therapy and Brain‐Targeted Delivery

Advanced Functional Materials, EarlyView.
An intrinsic photoactive star‐shaped zinc phtalocyanine‐poly(L‐glutamic acid) (ZnPc‐PGA) nanoplatform for multimodal glioblastoma (GBM) therapy and brain‐targeted elivery. A ZnPc‐PGA‐based multifunctional theranostic nanocarrier platform enables image‐guided, multimodal GBM therapy. ZnPc‐PGA nanocarriers support the integration of fluorescence imaging,
Amina Benaicha‐Fernández, Teodora Ranđelović, Ana Armiñán, Víctor Sebastián, Manuel Fuentes, Cristián Huck‐Iriart, Esther Masiá, Paula Carrascosa‐Marco, Pablo Juanes‐Velasco, Snežana Đorđević, Clara Bayona, Ignacio Ochoa, Maria Medel, Inmaculada Conejos‐Sánchez, María J. Vicent   +14 more
wiley   +1 more source

Scaling laws in the evolutionary processes of marine animals over the last 540 million years

Geosystems and Geoenvironment
Scaling laws are ubiquitous in modern biological systems. However, whether such patterns existed in deep-time biological systems is less investigated; the best-known example is the scaling law between the frequency and size of extinction events.
Haitao Shang
doaj   +1 more source

High‐Index, Low‐Loss Optical Material Platforms for Ultra‐Broadband Ultraviolet‐to‐Visible Achromatic Metalenses

Advanced Functional Materials, EarlyView.
An integrated material platform combining engineered SiNx thin films and printable ZrO2 nanoparticle‐embedded resin enables broadband achromatic metalenses from the ultraviolet to visible range. The demonstrated meta‐optics achieve near‐diffraction‐limited focusing with minimal chromatic aberration.
Hyunjung Kang, Dongmin Jeon, Eunji Lee, Junsuk Rho   +3 more
wiley   +1 more source