Results 61 to 70 of about 738,678 (282)
Structural insights into an engineered feruloyl esterase with improved MHET degrading properties
FEBS Letters, EarlyView.A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa +5 more
wiley +1 more source
Unified Dark Fluid with Constant Adiabatic Sound Speed and Cosmic Constraints
, 2012 As is known above 90% of the energy content in Universe is made of unknown dark component. Usually this dark fluid is separated into two parts: dark matter and dark energy.
Noh, Hyerim, Wang, Yuting, Xu, Lixin
core +1 more source
A Nonuniform Dark Energy Fluid: Perturbation Equations [PDF]
The Astrophysical Journal Supplement Series, 2008 We propose that galactic dark matter can be described by a nonuniform dark energy fluid. The underlying field is a decaying vector field, which might corresponds to a photon-like but massive particle of 4 degrees of dynamical freedom. We propose a very general Lagrangian for this vector field.
Halle, A., Zhao, H., Li, B.
openaire +2 more sources
FEBS Letters, EarlyView.This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel +13 more
wiley +1 more source
Kiselev black holes in anti-de Sitter spacetime are not viable
Nuclear Physics BWhile the Kiselev black hole solution does not describe a perfect fluid quintessence, it is possible that dark energy fluid is not isotropic, and so one may hope that the solution may still describe at least locally a black hole embedded in such a dark ...
Jiayi Xia, Yen Chin Ong
doaj +1 more source
Dark fluid: A complex scalar field to unify dark energy and dark matter [PDF]
Physical Review D, 2006 9 pages, 3 figures, references added, minor corrections and ...
openaire +2 more sources
Aetherizing Lambda: Barotropic fluids as dark energy [PDF]
Physical Review D, 2009 6 pages; v2 matches PRD published ...
Linder, Eric V., Scherrer, Robert J.
openaire +2 more sources
GDNF‐RET signaling drives pulmonary neuroendocrine cell hyperplasia and allergic airway inflammation
FEBS Letters, EarlyView.A neuroimmune interaction centered on the PNEC‐ILC2 axis in an asthma model. PNEC‐derived CGRP activates nearby ILC2s, which then release cytokines, including IL‐5 and IL‐13. These cytokines promote eosinophil and macrophage infiltration. Subsequently, GDNF produced by these cells induces PNEC hyperplasia via the GDNF receptors, RET and GFRα1 ...
Tasuku Kawano +3 more
wiley +1 more source
Dark matter fluid constraints from galaxy rotation curves
European Physical Journal C: Particles and Fields, 2023 Galaxy rotation curves are considered to be convincing evidence for dark matter or some dynamically equivalent alternative mechanism. Starting only from the rotation curve data, we present a model independent approach of testing a general hypothesis that
Dalibor Perković, Hrvoje Štefančić
doaj +1 more source
Clustering Properties of Dynamical Dark Energy Models
, 2008 We provide a generic but physically clear discussion of the clustering properties of dark energy models. We explicitly show that in quintessence-type models the dark energy fluctuations, on scales smaller than the Hubble radius, are of the order of the ...
C. J. A. P. Martins +3 more
core +1 more source