Membrane
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Related Articles from SNS
Exponential Time Differencing Schemes for a Phase-Field Model of Multicomponent Membranes
arXiv:2606.04347v1 Announce Type: new Abstract: In this paper, we develop and analyze exponential time differencing (ETD) schemes for a phase-field model of multicomponent membranes proposed in our previous work \cite{luo2025ohta}, in which membrane deformation is governed by a force-balance phase-field equation and protein segregation is described by a membrane-associated Ohta-Kawasaki (OK) dynamics. For a fixed phase-field membrane, we introduce a geometry-adapted operator splitting method...
Conserved structural features of RNA export pores spanning the double membrane of arterivirus and coronavirus replication organelles
Corona- and arteriviruses are distantly related positive-stranded RNA virus families within the order Nidovirales. Both transform intracellular membranes into double-membrane vesicles (DMVs) that serve as replication organelles. Newly made viral RNA presumably exits DMVs through double-membrane-spanning molecular pores formed by coronavirus nsp3-nsp4 and arterivirus nsp2-nsp3.
Highly Deformable Proprioceptive Membrane for Real-Time 3D Shape Reconstruction
Announce Type: replace Abstract: Reconstructing the three-dimensional (3D) geometry of object surfaces is essential for robot perception, yet vision-based approaches degrade under low illumination or occlusion. This limitation motivates the design of a proprioceptive membrane that conforms to the surface of interest and infers 3D geometry by reconstructing its own deformation. Conventional deformation-aware membranes typically rely on resistive, capacitive, or magneto-sensitive mechanisms,...
Variational quantum algorithm for anion exchange across electrolyzer membrane
arXiv:2512.01120v2 Announce Type: replace Abstract: We present a variational quantum algorithm that solves the one-dimensional diffusion problem with a space-dependent diffusion constant $D(x)$. This problem is relevant for the exchange of hydroxide ions across a two-layer membrane in an alkaline electrolyzer, where the concentration of OH$^-$ ion determines the chemical stability for longer time periods. We use $16$ to $64$ grid points across the membrane, resulting from $n=4$ to 6 data...
Tiny membrane tethers revealed as key to plant cell survival in drought
Tiny membrane tethers revealed as key to plant cell survival in drought Sadie Harley Scientific Editor Robert Egan Associate Editor Water deficit resistance in plants has long been a topic of interest for cultivating reliable crops. Some plants can alter their above-ground structure to lock in moisture, while others develop deep, industrious roots that find hard-to-reach water sources. While such responses are obvious to the naked eye, we know little about how responses to environmental...
Constitutive plasma membrane interaction of active Rho GEF Ect2 inhibits cortex contraction pulses
During cell division, multiple guanine nucleotide exchange factors (GEFs), including the mitotic regulator Ect2 and Lbc-type GEFs, regulate the dynamics of RhoA activity and actomyosin contractility. In interphase, Lbc-type GEFs are predominantly cytosolic and are transiently recruited to the plasma membrane via a Rho-dependent positive-feedback mechanism that generates stochastic pulses of Rho activity and cortical contractions. In contrast, during interphase, Ect2 is primarily sequestered...
A membrane-anchored inhibitor of papain-like cysteine proteases promotes Pseudomonas root colonization
Pseudomonas species, spanning both beneficial and pathogenic lifestyles, possess conserved mechanisms to modulate plant immunity. Nevertheless, the mechanisms by which commensal bacteria establish and maintain host colonization remain poorly understood. Here, we report the characterization of a Pseudomonas chagasin-like protease inhibitor (Cpi1), conserved across pseudomonads representing a novel class of membrane-anchored PLCP inhibitor.
Palmitoylated importin α recruits PKCε to the plasma membrane to drive breast cancer cell motility
Importin is a nuclear transport factor which canonically has a role in binding and shuttling NLS-containing proteins from the cytoplasm into the nucleus. Recently, it has been shown that when palmitoylated by specific palmitoyl acyl transferases, importin can partition to the plasma membrane where its roles remain widely unknown. Patients with breast cancer displaying increased importin expression have advanced tumor size, poor tumor differentiation, and reduced overall and recurrence-free...
Membrane: A Self-Evolving Contrastive Safety Memory for LLM Agent Defense
arXiv:2606.05743v1 Announce Type: new Abstract: Despite advances in safety alignment, large language models remain vulnerable to continuously evolving jailbreaks. Existing fine-tuned safety classifiers cannot adapt to these evolving attacks, while adaptive memory-based guardrails tend to over-refuse benign queries that resemble stored attacks. We propose Membrane, a self-evolving guardrail built on Contrastive Safety Memory (CSM): each cell pairs the conditions for blocking a harmful query...
Optical chirality of membrane metasurfaces with broken in-plane symmetry
arXiv:2606.05775v1 Announce Type: new Abstract: We study chiroptical properties of single-layer dielectric membrane metasurfaces with broken in-plane symmetry. In sharp contrast to a common belief that chiral optical phenomena require symmetry breaking in the vertical direction, we show that flat single-layer metasurfaces are capable of strong specific chiral effects. Although the single-layer geometry forbids conventional co-polarized circular dichroism, strong resonant conversion circular...