Results 81 to 90 of about 4,227,419 (291)

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

FEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

Social class and gender in an equation of students' mathematics identity [PDF]

Nastava i Vaspitanje
Addressing the achievement gap in mathematics across social class and gender is essential, as mathematics is widely seen as a pathway to social mobility and a tool for breaking cycles of inequality.
Mićić Katarina, Jovanović Olja
doaj   +1 more source

Lifespan of solutions for a class of pseudo-parabolic equation with weak-memory

Alexandria Engineering Journal, 2020
The most important feature in this article is the existence of the weak-viscoelastic terms which can’t pull out the whole system. It is concerned mainly with the global in time non-existence for a large class of pseudo-parabolic equation with weak ...
Khaled Zennir, Tosiya Miyasita
doaj   +1 more source

Chiral separation of chloroalkanes with the chromatographic column onboard Martian rovers

FEBS Letters, EarlyView.
Computer image of the Rosalind Franklin Rover of ESA's ExoMars mission. ExoMars is scheduled to land on planet Mars in Oxia Planum in 2029. This area represents an interesting spot to look for biosignatures. Investigations of ExoMars include measurement on molecular chirality. We show that chiral chloroalkanes, that have been identified on Mars, can be
Asma Merzougui, Agnes Banreti, Armelle L. Ernst, Guillaume Leseigneur, Uwe J. Meierhenrich   +4 more
wiley   +1 more source

Artificial molecular machines and motors—Design and control of nanoscale motion

FEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source

Cubic B-splines collocation method for a class of partial integro-differential equation

Alexandria Engineering Journal, 2018
In this paper, a numerical method is proposed to estimate the solution of initial-boundary value problems for a class of partial integro-differential equations.
M. Gholamian, J. Saberi-Nadjafi
doaj   +1 more source

Oscillations in a class of difference equations

Applied Mathematics and Computation, 1992
The following theorem is proved: Given an \(m\)-th order difference equation \[ \Delta^ mA_ n-\sum_{j\in J}p_ jA_{n+k_ j}=0,\;n\in\mathbb{N} \tag{1} \] and the associated characteristic equation (2) \((\lambda-1)^ m-\sum_{j\in J}p_ j\lambda^{k_ j}=0\) where \(J\) is a nonempty subset of \(\mathbb{N}\), for \(j\in J\) the \(p_ j\) are positive real ...
openaire   +3 more sources

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

On Airy Solutions of the Second Painleve Equation [PDF]

, 2016
In this paper, we discuss Airy solutions of the second Painleve equation and two related equations, the Painleve XXXIV equation and the Jimbo-Miwa-Okamoto sigma form of second Painleve equation, are discussed.
Clarkson, Peter
core   +1 more source

Mirroring in lattice equations and a related functional equation

Electronic Journal of Qualitative Theory of Differential Equations
We use a functional form of the mirroring technique to fully characterize equivalence classes of unbounded stationary solutions of lattice reaction-diffusion equations with eventually negative and decreasing nonlinearities.
Jakub Hesoun, Petr Stehlík, Jonas Volek
doaj   +1 more source