Results 111 to 120 of about 504,503 (314)

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

open access: yesFEBS 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   +3 more
wiley   +1 more source

Existence of a positive solution for a -Laplacian semipositone problem

open access: yesBoundary Value Problems, 2005
We consider the boundary value problem in satisfying on , where on , is a parameter, is a bounded domain in with boundary , and for . Here, is a nondecreasing function for some satisfying (semipositone).
Shivaji R, Chhetri Maya
doaj  

General Conditions for Existence of Maximal Elements via the Uncovered Set [PDF]

open access: yes
This paper disentangles the topological assumptions of classical results (e.g., Walker (1977)) on existence of maximal elements from rationality conditions. It is known from the social choice literature that under the standard topological conditions-with
John Duggan
core  

The human gut microbiome across the life course

open access: yesFEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero   +4 more
wiley   +1 more source

EXISTENCE AND NON EXISTENCE OF SOLUTIONS FOR A BI-NONLOCAL PROBLEM

open access: yesMatematički Vesnik
Summary: The aim of this paper is to investigate the existence and non-existence of non-trivial weak solutions to a bi-nonlocal problem under sufficient conditions by using the variational arguments.
Jaafri, F., Ayoujil, A., Berrajaa, M.
openaire   +2 more sources

Existence of a classical solution for linear parabolic systems of nondivergence form [PDF]

open access: yes, 2004
summary:We prove the unique existence of a classical solution for a linear parabolic system of nondivergence and nondiagonal form. The key ingredient is to combine the energy estimates with Schauder estimates and to obtain a uniform boundedness of a ...
Misawa, Masashi
core  

Septin 9 PB domains coordinate centrosome positioning and microtubule acetylation to control epithelial polarity

open access: yesFEBS Letters, EarlyView.
Septin 9 polybasic domains couple phosphoinositide‐rich membrane binding to centrosome positioning, Golgi organization, and microtubule acetylation to control epithelial polarity. Their loss disrupts this axis, causing centrosome mispositioning, Golgi fragmentation, reduced microtubule acetylation, and polarity inversion via upregulation of the ...
Ting ting Cai   +4 more
wiley   +1 more source

Existence of Positive Solution to a Quasilinear Elliptic Problem in RN [PDF]

open access: yesSurveys in Mathematics and its Applications, 2006
In this paper we prove the existence of positive solution for the following quasilinear problem ∆pu = a(x)f(u) in RN u > l >0 in RN u(x) → l, as |x| → ∞ where ∆p(1 < p < ∞) is the p -Laplacian operator.The proof is based on the results due to Diaz-Saa ...
Dragos-Patru Covei
doaj  

On the existence of a periodic solution of a nonlinear ordinary differential equation

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1998
Consider a planar forced system of the following form {dxdt=μ(x,y)+h(t)dydt=−ν(x,y)+g(t), where h(t) and g(t) are 2π-periodic continuous functions, t∈(−∞,∞) and μ(x,y) and ν(x,y) are continuous and satisfy local Lipschitz conditions.
Hsin Chu, Sunhong Ding
doaj   +1 more source

Existence of a weak solution for the semigeostrophic equation with integrable initial data

open access: yes, 2015
In this article we present a proof of existence of a weak solution for the semigeostrophic system of equations, formulated as an active scalar transport equation with Monge-Ampere coupling, with initial data in L-c(1) (R-3).
Lopes, HJN, Lopes, MC
core  

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