Results 21 to 30 of about 2,831,728 (287)

A novel Nodal enhancer dependent on pluripotency factors and Smad2/3 signaling conditions a regulatory switch during epiblast maturation [PDF]

open access: yes, 2014
During early development, modulations in the expression of Nodal, a TGFβ family member, determine the specification of embryonic and extra-embryonic cell identities.
Jérôme Collignon (34631)   +29 more
core   +1 more source

Geometric Formulation of Edge and Nodal Finite Element Equations in Electromagnetics [PDF]

open access: yes, 2011
Finite element equations for electromagnetic fields are examined, in particular nodal elements using scalar potential formulation and edge elements for vector potential formulation.
Sykulski, J.K., Demenko, A.
core   +2 more sources

Ionic basis of a differential effect of adenosine on refractoriness in rabbit AV nodal and atrial isolated myocytes [PDF]

open access: yes, 1999
Methods: The whole cell patch clamp technique was used to record action potentials and ion currents in AV nodal and left atrial myocytes isolated enzymatically from rabbit hearts.
Kane, K.A., Rankin, A.C., Workman, A.J.
core   +1 more source

Hex acts with beta-catenin to regulate anteroposterior patterning via a Groucho-related co-repressor and Nodal [PDF]

open access: yes, 2006
In Xenopus, the establishment of the anteroposterior axis involves two key signalling pathways, canonical Wnt and Nodal-related TGFbeta. There are also a number of transcription factors that feedback upon these pathways.
Gardner, Clare E   +11 more
core   +1 more source

Linear Sturm-Liouville problems with Riemann-Stieltjes integral boundary conditions [PDF]

open access: yesOpuscula Mathematica, 2018
We study second-order linear Sturm-Liouville problems involving general homogeneous linear Riemann-Stieltjes integral boundary conditions. Conditions are obtained for the existence of a sequence of positive eigenvalues with consecutive zero counts of the
Qingkai Kong, Thomas E. St. George
doaj   +1 more source

Nodal solutions for a second-order $m$-point boundary value problem [PDF]

open access: yes, 1980
summary:We study the existence of nodal solutions of the $m$-point boundary value problem \[ u^{\prime \prime }+ f(u)=0, \quad 00$ and ...
A Ambrosetti   +4 more
core   +1 more source

Nodal solutions with a prescribed number of nodes for the Kirchhoff-type problem with an asymptotically cubic term

open access: yesAdvances in Nonlinear Analysis, 2023
In this article, we study the following Kirchhoff equation: (0.1)−(a+b‖∇u‖L2(R3)2)Δu+V(∣x∣)u=f(u)inR3,-(a+b\Vert \nabla u{\Vert }_{{L}^{2}\left({{\mathbb{R}}}^{3})}^{2})\Delta u+V\left(| x| )u=f\left(u)\hspace{1.0em}\hspace{0.1em}\text{in}\hspace{0.1em ...
Wang Tao, Yang Yanling, Guo Hui
doaj   +1 more source

Multiple nodal solutions of the Kirchhoff-type problem with a cubic term

open access: yesAdvances in Nonlinear Analysis, 2022
In this article, we are interested in the following Kirchhoff-type problem (0.1)−a+b∫RN∣∇u∣2dxΔu+V(∣x∣)u=∣u∣2uinRN,u∈H1(RN),\left\{\begin{array}{l}-\left(a+b\mathop{\displaystyle \int }\limits_{{{\mathbb{R}}}^{N}}| \nabla u\hspace{-0.25em}{| }^{2}{\rm{d}}
Wang Tao, Yang Yanling, Guo Hui
doaj   +1 more source

Least action nodal solutions for the quadratic Choquard equation [PDF]

open access: yes, 2016
We prove the existence of a minimal action nodal solution for the quadratic Choquard equation (Formula presented), where Iα is the Riesz potential of order α ∈ (0,N).
Vitaly Moroz   +4 more
core   +1 more source

On sign-changing solutions for (p,q)-Laplace equations with two parameters

open access: yesAdvances in Nonlinear Analysis, 2016
We investigate the existence of nodal (sign-changing) solutions to the Dirichlet problem for a two-parametric family of partially homogeneous (p,q){(p,q)}-Laplace equations -Δp⁢u-Δq⁢u=α⁢|u|p-2⁢u+β⁢|u|q-2⁢u{-\Delta_{p}u-\Delta_{q}u=\alpha\lvert u\rvert^{p-
Bobkov Vladimir, Tanaka Mieko
doaj   +1 more source

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