Results 111 to 120 of about 338,751 (320)

Control of transversal instabilities in reaction-diffusion systems

open access: yesNew Journal of Physics, 2018
In two-dimensional reaction-diffusion systems, local curvature perturbations on traveling waves are typically damped out and vanish. However, if the inhibitor diffuses much faster than the activator, transversal instabilities can arise, leading from flat
Sonja Totz   +3 more
doaj   +1 more source

The effect of light quality on the expression of stomatal development genes of maize

open access: yesPhotosynthetica, 2019
Light-induced stomatal development is mediated through a crosstalk between cryptochrome (CRY), phytochrome (phy), and constitutive photomorphogenic 1 (COP1)-signaling systems.
T.D. LIU, X.W. ZHANG, Y. XU
doaj   +1 more source

Global existence of solutions of an activator-inhibitor system

open access: yesDiscrete & Continuous Dynamical Systems - A, 2006
We consider the generalized Gierer-Meinhardt system $\frac{\partial u_{j}}{\partial t}=d_{j}$Δ $u_{j}- a_{j}u_{j} +g_{j}(x,u) \ \ \text{in}\ \ \Omega\times[0,T) $ , $\frac{\partial u_{j}}{\partial\nu}=0\ \ \text{on}\ \ \partial\Omega\times[ 0,T) $, $u_{j}(x,0) =\varphi_{j}(x)\ \ \text{in}\ \ \Omega$ where $\Omega$ is a smooth ...
openaire   +1 more source

Nonlocal control of pulse propagation in excitable media

open access: yes, 2014
We study the effects of nonlocal control of pulse propagation in excitable media. As a generic example for an excitable medium the FitzHugh-Nagumo model with diffusion in the activator variable is considered. Nonlocal coupling in form of an integral term
Bachmair, Clemens A., Schöll, Eckehard
core   +1 more source

Modeling hepatic fibrosis in TP53 knockout iPSC‐derived human liver organoids

open access: yesMolecular Oncology, EarlyView.
This study developed iPSC‐derived human liver organoids with TP53 gene knockout to model human liver fibrosis. These organoids showed elevated myofibroblast activation, early disease markers, and advanced fibrotic hallmarks. The use of profibrotic differentiation medium further amplified the fibrotic signature seen in the organoids.
Mustafa Karabicici   +8 more
wiley   +1 more source

Daytime plasma cortisol and cortisol response to dexamethasone suppression are associated with a prothrombotic state in hypertension

open access: yesFrontiers in Endocrinology
Background and aimsA prothrombotic state was demonstrated in patients with Cushing’s syndrome and is involved in the development and progression of cardiovascular and renal damage in hypertensive patients.
Gabriele Brosolo   +9 more
doaj   +1 more source

Circadian Rhythms in the CNS and Peripheral Clock Disorders: Role of the Biological Clock in Cardiovascular Diseases

open access: yesJournal of Pharmacological Sciences, 2007
The cardiovascular diseases are closely related to circadian rhythm, which is under the control of the biological clock. Clock genes show circadian oscillation not only in the suprachiasmatic nucleus but also in peripheral tissues, suggesting the ...
Koji Maemura   +2 more
doaj   +1 more source

Excitation Waves on a Minimal Small-World Model

open access: yes, 2014
We examine traveling-wave solutions on a regular ring network with one additional long-range link that spans a distance d. The nodes obey the FitzHugh-Nagumo kinetics in the excitable regime.
Hartung, Benedikt   +3 more
core   +1 more source

A synthetic benzoxazine dimer derivative targets c‐Myc to inhibit colorectal cancer progression

open access: yesMolecular Oncology, EarlyView.
Benzoxazine dimer derivatives bind to the bHLH‐LZ region of c‐Myc, disrupting c‐Myc/MAX complexes, which are evaluated from SAR analysis. This increases ubiquitination and reduces cellular c‐Myc. Impairing DNA repair mechanisms is shown through proteomic analysis.
Nicharat Sriratanasak   +8 more
wiley   +1 more source

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