Results 71 to 80 of about 163,164 (293)

An elementary operator with log-hyponormal, p-hyponormal entries

, 2008
A Hilbert space operator A∈B(H) is p-hyponormal, A∈(p-H), if |A∗|2p⩽|A|2p; an invertible operator A∈B(H) is log-hyponormal, A∈(ℓ-H), if log(TT∗)⩽log(T∗T). Let dAB=δAB or ▵AB, where δAB∈B(B(H)) is the generalised derivation δAB(X)=AX-XB and ▵AB∈B(B(H)) is
B.P. Duggal, Duggal, B.P.
core   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

FEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure, Misaki K. Nishio, Satoru Okuda, Kohji Hotta   +3 more
wiley   +1 more source

On the Characterizations of Some Strongly Bounded Operators on C(K, X) Spaces

Axioms
Suppose X and Y are Banach spaces, K is a compact Hausdorff space, and C(K, X) is the Banach space of all continuous X-valued functions (with the supremum norm). We will study some strongly bounded operators T:C(K, X)→Y with representing measures m:Σ→L(X,
Ioana Ghenciu
doaj   +1 more source

Limiting cases for the p(x)-Laplace operator

, 2016
The aim of this dissertation is the study of a non-homogeneous Neumann problem, where the p(x)-Laplacian is involved. We assume that the variable exponent p(·) can reach the limiting values of 1 and infinity in a subdomain of positive measure.
Καραγιώργος, Ιωάννης, Karagiorgos, Ioannis, Karagiorgos, Yiannis   +2 more
core   +1 more source

Phosphoinositides and inositol phosphates as molecular glues

FEBS Letters, EarlyView.
Inositol phosphates (IPs) and phosphoinositides (PIPs) regulate diverse eukaryotic processes. Beyond recruiting signaling proteins or acting as structural cofactors, recent studies suggest they mediate protein–protein interactions as natural molecular glues.
Aleshia Seaton‐Terry, Alexander J. Cutright, Mong Na Claire Loi, Jessica Martin, Joseph W. Gilligan, Jakub N. Kubina, Michael J. Arambula, Susanna Tanada Palmu, Daniella Zhou, Raymond D. Blind   +9 more
wiley   +1 more source

PARK(ing) time–How park deficiency affects the biological clock in a Drosophila model of Parkinson's disease

FEBS Letters, EarlyView.
Drosophila park mutants serve as a model for Parkinson's disease. We used this strain to investigate the connection between oxidative stress and the circadian clock mechanism. We showed that increased oxidative stress affects the physiology of pacemaker cells, disrupting their daily structural plasticity. Lack of rhythmic signaling from pacemaker cells
Kamila Zientara, Kinga Skoczek, Elzbieta Pyza, Milena Damulewicz   +3 more
wiley   +1 more source

Unique continuation for solutions of p(x)-Laplacian equations

Electronic Journal of Differential Equations, 2012
We study the unique continuation property for solutions to the quasilinear elliptic equation $$ hbox{div}(|abla u|^{p(x)-2}abla u) +V(x)|u|^{p(x)-2}u=0quad hbox{in }Omega, $$ where $Omega$ is a smooth bounded domain in $mathbb{R}^N$ and $1<p(x)&
Johnny Cuadro, Gabriel Lopez G.
doaj  

Existence Theorems for Some Classes of Boundary Value Problems Involving the P(X)-Laplacian

Nonlinear Analysis, 2008
We prove an alternative for a nonlinear eigenvalue problem involving the p(x)-Laplacian and study a subcritical boundary value problem for the same operator.
Ionica Andrei
doaj   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source