Results 81 to 90 of about 440,924 (308)

Inverse-Positive Matrices and Stability Properties of Linear Stochastic Difference Equations with Aftereffect

This article examines the stability properties of linear stochastic difference equations with delays. For this purpose, a novel approach is used that combines the theory of inverse-positive matrices and the asymptotic methods developed by N.V.
Kadiev, Ramazan I., Ramazan I. Kadiev, Ponossov, Arkadi, Arcady Ponosov   +3 more
core   +1 more source

Degradation mechanism of the von Willebrand factor A2 domain by nattokinase

FEBS Letters, EarlyView.
Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto, Masatomo So, Ayako Furukawa, Kenji Sugase   +3 more
wiley   +1 more source

On the oscillation of certain third-order difference equations [PDF]

, 2005
We establish some new criteria for the oscillation of third-order difference equations of the form Δ((1/a2(n))(Δ(1/a1(n))(Δx(n))α1)α2)+δq(n)f(x[g(n)])=0, where Δ is the forward difference operator defined by Δx(n)=x(n+1)−x(n)
Said Grace, Ravi P. Agarwal, Said R. Grace, O'Regan, Donal, Ravi P Agarwal, Donal O’Regan, Donal O'Regan, Donal O'Regan, Agarwal, Ravi P, Grace, Said   +9 more
core   +1 more source

Invariants for Difference Equations and Systems of Difference Equations of Rational Form

Journal of Mathematical Analysis and Applications, 1997
The author consideres the system of difference equations \[ x_{n+1} = \frac{a_n y_n + A}{x_{n-1}}, \qquad y_{n+1} = \frac{b_n x_n + A}{y_{n-1}}, n = 0, 1,\dots\tag{1} \] where the coefficients \(\{a_n\}\) and \(\{b_n\}\) are periodic sequences of positive numbers of period 2 and \(A\) is a positive constant. Some invariants for system (1) are presented.
openaire   +1 more source

The pyruvate generator is a common phenomenon in mitochondria from different rat and mouse brain regions

FEBS Letters, EarlyView.
The pyruvate generator, which causes activation of respiration by extra‐mitochondrial Ca2+, is also present and functional in rat brainstem mitochondria, as it is in other brain regions. This finding is confirmed by experiments with a fully reconstituted malate–aspartate shuttle (MAS).
Grazyna Debska‐Vielhaber, Niki Karavasili, Matthias Kunz, Zemfira Gizatullina, Timur Gainutdinov, Stefan Vielhaber, Wolfram S. Kunz, Frank N. Gellerich   +7 more
wiley   +1 more source

Closed-Form Solutions of a Nonlinear Rational Second-Order Three-Dimensional System of Difference Equations

Mathematics
In this paper, we investigate the behavior of solutions to a nonlinear system of rational difference equations of order two, defined by xn+1=xnyn−1yn(a+bxnyn−1),yn+1=ynzn−1zn(c+dynzn−1),zn+1=znxn−1xn(e+fznxn−1), where n denotes a nonzero integer; the ...
Messaoud Berkal, Taha Radwan, Mehmet Gümüş, Raafat Abo-Zeid, Karim K. Ahmed   +4 more
doaj   +1 more source

Backward difference replacements of the space derivative in first order hyperbolic equations

, 1983
Two families of two-time level difference schemes are developed for the numerical solution of first order hyperbolic partial differential equations with one space variable.
Khaliq, AQM, Twizell, EH
core  

Analysis of Difference Approximations to Delay Pseudo-Parabolic Equations [PDF]

, 2016
International Conference on Differential and Difference Equations and Applications (ICDDEA) -- MAY 18-22, 2015 -- Mil Acad, Amadora, PORTUGALWOS: 000391876600016This work deals with the one-dimensional initial-boundary Sobolev or pseudo-parabolic problem
Amiraliyev, Gabil M., Kudu, Mustafa, Gabil M. Amiraliyev, Mustafa Kudu, Amirali, İlhame, Ilhame Amirali   +5 more
core   +1 more source

On Invariants for Difference Equations and Systems of Difference Equations of Rational Form

Journal of Mathematical Analysis and Applications, 1999
The author generalizes results of \textit{C. J. Schinas} [J. Math. Anal. Appl. 216, No. 1, 164-179 (1997; Zbl 0889.39006)] on invariants of difference equations of rational form to second- and third-order autonomous and nonautonomous difference equations.
openaire   +2 more sources

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