Results 91 to 100 of about 336,429 (288)

Order reduction in semiclassical cosmology

, 1999
We investigate the Robertson-Walker cosmology with Lagrangian $R+\alpha_1\hbar R^2+\alpha_2\hbar R^{\mu\nu}R_{\mu\nu} +L_{rad}$ where $L_{rad}$ means classical source with traceless energy-momentum tensor.
Siemieniec-Ozieblo, Grazyna, Woszczyna, Andrzej   +1 more
core   +1 more source

Structural and functional characterization of chitinase from carnivorous plant Drosera adelae

FEBS Open Bio, EarlyView.
A class I chitinase from the carnivorous plant Drosera adelae was expressed and purified using a yeast system, revealing high enzymatic activity. Structural analyses of the catalytic and chitin‐binding domains identified key tyrosine residues involved in substrate binding, offering insights into the enzyme's adaptation for insect digestion.
Kazunari Yoneda, Yuki Naruse, Yusaku Suizu, Tomohiro Araki, Yoshikazu Hoshi, Haruhiko Sakuraba, Junji Hayashi, Toshihisa Ohshima   +7 more
wiley   +1 more source

Robust Stability for Impulsive Systems With Polytope Uncertainties

IEEE Access, 2019
This paper is concerned with robust stability for impulsive systems with polytope uncertainties. At first, the stability for impulsive systems without uncertainties is addressed by employing a Lyapunov-like functional.
Hanyong Shao, Wenjing Wang
doaj   +1 more source

Iterative methods for solving Ambartsumian’s equations. Part 1

Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2021
Background. Ambartsumian’s equation and its generalizations are one of the main integral equations of astrophysics, which have found wide application in many areas of physics and technology. An analytical solution to this equation is currently unknown,
I.V. Boykov, A.A. Shaldaeva
doaj   +1 more source

Polarons as stable solitary wave solutions to the Dirac-Coulomb system

, 2013
We consider solitary wave solutions to the Dirac--Coulomb system both from physical and mathematical points of view. Fermions interacting with gravity in the Newtonian limit are described by the model of Dirac fermions with the Coulomb attraction.
Abenda S, Andrew Comech, Boussaid N, Buslaev V S, Chugunova M, Comech A, Comech A, Cuccagna S, Devreese J, Fialkovsky I V, Guan M, Landau L D, Landau L D, Landau L D, Landau L D, Lieb E H, Lisi A G, Mikhail Zubkov, Ounaies H, Pekar S, Pelinovsky D E, Vladimirov A A, Volovik G E, Volovik G E ed Bjorken J D   +23 more
core   +1 more source

Short‐term actions of epigalocatechin‐3‐gallate in the liver: a mechanistic insight into hypoglycemic and potential toxic effects

FEBS Open Bio, EarlyView.
Epigallocatechin‐3‐gallate (EGCG) acutely inhibited gluconeogenesis and enhanced glycolysis, glycogenolysis, and fatty acid oxidation in perfused rat livers. Mechanistic assays revealed mitochondrial uncoupling, inhibition of pyruvate carboxylation and glucose‐6‐phosphatase, shift of NADH/NAD+ ratios toward oxidation, and loss of membrane integrity ...
Carla Indianara Bonetti, Bruna Lopes Correia, Francielle Cristina Nakamura Manicardi, Nairana Mithieli de Queiroz Eskuarek Melo, Vanesa de Oliveira Pateis, Jurandir Fernando Comar, Anacharis Babeto de Sá‐Nakanishi, Adelar Bracht, Lívia Bracht   +8 more
wiley   +1 more source

Pattern formation in Hamiltonian systems with continuous spectra; a normal-form single-wave model [PDF]

, 2013
Pattern formation in biological, chemical and physical problems has received considerable attention, with much attention paid to dissipative systems. For example, the Ginzburg--Landau equation is a normal form that describes pattern formation due to the ...
Balmforth, N. J., Morrison, P. J., Thiffeault, J. -L.   +2 more
core  

Comments on No-Hair Theorems and Stabilty of Blackholes

, 1992
In the light of recent blackhole solutions inspired by string theory, we review some old statements on field theoretic hair on blackholes. We also discuss some stability issues. In particular we argue that the two dimensional string blackhole solution is
Adler, Bekenstein, Brustein, Brustein, Callan, Coleman, Das, de Alwis, de Alwis, Demeterfi, Demeterfi, Ellis, Fradkin, Garfinkle, Gibbons, Gibbons, Gibbons, Hartle, Itoi, Lee, Mandal, Misner, S.P. de Alwis, Schwarz, Seiberg, Shapere, Teitelboim, Tseytlin, Witten   +28 more
core   +2 more sources

A general model for analysis of linear and hyperbolic enzyme inhibition mechanisms

FEBS Open Bio, EarlyView.
We developed a general enzyme kinetic model that integrates these six basic inhibition mechanism onto a single one. From this model, we deduced a general enzyme kinetic equation that through modulation of simple parameters, γ (the relative inhibitor affinity for two binding sites) and β (the reactivity of the enzyme–substrate–inhibitor complex), is ...
Rafael S. Chagas, Sandro R. Marana
wiley   +1 more source

Exam‐level analysis of lecture capture viewing and student exam performance

FEBS Open Bio, EarlyView.
This study asks how lecture capture relates to exam performance in biology courses with three noncumulative exams. Mixed‐effects modeling separated between‐students from within‐student effects on exam %. Students who watched more recordings earned higher grades, but viewing spikes above a student's own mean, consistent with cramming, predicted small ...
Kirk Hillsley
wiley   +1 more source