Results 81 to 90 of about 2,378,174 (337)

Microbial exopolysaccharide production by polyextremophiles in the adaptation to multiple extremes

FEBS Letters, EarlyView.
Polyextremophiles are microorganisms that endure multiple extreme conditions by various adaptation strategies that also include the production of exopolysaccharides (EPSs). This review provides an integrated perspective on EPS biosynthesis, function, and regulation in these organisms, emphasizing their critical role in survival and highlighting their ...
Tracey M Gloster, Ebru Toksoy Öner
wiley   +1 more source

Global exponential stabilization of freeway models [PDF]

International Journal of Robust and Nonlinear Control, 2015
SummaryThis work is devoted to the construction of feedback laws, which guarantee the robust global exponential stability of the uncongested equilibrium point for general discrete‐time freeway models. The feedback construction is based on a control Lyapunov function approach and exploits certain important properties of freeway models.
Καραφυλλης Ιασων(http://users.isc.tuc.gr/~ikarafyllis), Karafyllis Iason(http://users.isc.tuc.gr/~ikarafyllis), Κοντορινακη Μαρια(http://users.isc.tuc.gr/~mkontorinaki1), Kontorinaki Maria(http://users.isc.tuc.gr/~mkontorinaki1), Παπαγεωργιου Μαρκος(http://users.isc.tuc.gr/~mpapageorgiou), Papageorgiou Markos(http://users.isc.tuc.gr/~mpapageorgiou)   +5 more
openaire   +6 more sources

A global stability estimate for the Gel'fand-Calderon inverse problem in two dimensions

, 2010
We prove a global logarithmic stability estimate for the Gel'fand-Calderon inverse problem on a two-dimensional ...
Novikov, Roman, Santacesaria, Matteo
core   +4 more sources

The nicotinamide hypothesis revisited—plant defense signaling integrating PARP, nicotinamide, nicotinic acid, epigenetics, and glutathione

FEBS Letters, EarlyView.
Nicotinamide (NIC) and nicotinic acid (NIA) are proposed as stress signaling compounds in plants. Oxidative stress may lead to single strand breaks (SSB) in DNA, which activate poly(ADP‐ribose) polymerase (PARP). NIC and NIA are then formed from NAD. NIC and NIA can promote epigenetic changes leading to the expression of defense genes specific for the ...
Torkel Berglund, Anna B. Ohlsson
wiley   +1 more source

Global stability of nonlinear feedback systemswith positive descriptor linear parts [PDF]

Bulletin of the Polish Academy of Sciences: Technical Sciences, 2019
The global (absolute) stability of nonlinear systems with negative feedbacks and positive descriptor linear parts is addressed. Transfer matrices of positive descriptor linear systems are analyzed.
T. Kaczorek
doaj   +1 more source

Comparing self‐reported race and genetic ancestry for identifying potential differentially methylated sites in endometrial cancer: insights from African ancestry proportions using machine learning models

Molecular Oncology, EarlyView.
Integrating ancestry, differential methylation analysis, and machine learning, we identified robust epigenetic signature genes (ESGs) and Core‐ESGs in Black and White women with endometrial cancer. Core‐ESGs (namely APOBEC1 and PLEKHG5) methylation levels were significantly associated with survival, with tumors from high African ancestry (THA) showing ...
Huma Asif, J. Julie Kim
wiley   +1 more source

Global stability of an age-structured epidemic model with general Lyapunov functional

Mathematical Biosciences and Engineering, 2019
In this paper, we focus on the study of the dynamics of a certain age structured epidemic model. Our aim is to investigate the proposed model, which is based on the classical SIR epidemic model, with a general class of nonlinear incidence rate with some ...
Abdennasser Chekroun, Mohammed Nor Frioui , Toshikazu Kuniya , Tarik Mohammed Touaoula   +3 more
doaj   +1 more source

Global Behavior of a Multi–Group Seir Epidemic Model with Spatial Diffusion in a Heterogeneous Environment

International Journal of Applied Mathematics and Computer Science, 2022
In this paper, we propose a multi-group SEIR epidemic model with spatial diffusion, where the model parameters are spatially heterogeneous. The positivity and ultimate boundedness of the solution, as well as the existence of a global attractor of the ...
Liu Pengyan, Li Hong-Xu
doaj   +1 more source

New global stability estimates for monochromatic inverse acoustic scattering

, 2012
We give new global stability estimates for monochromatic inverse acoustic scattering. These estimates essentially improve estimates of [P. Hahner, T. Hohage, SIAM J. Math.
Alexeenko N. V., Beals R., Berezanskii Y. M., Faddeev L. D., Faddeev L. D., Henkin G. M., Isaev M. I., Lavine R. B., M. I. Isaev, Novikov R., Novikov R. G., Novikov R. G., R. G. Novikov   +12 more
core   +2 more sources

A large‐scale retrospective study in metastatic breast cancer patients using circulating tumour DNA and machine learning to predict treatment outcome and progression‐free survival

Molecular Oncology, EarlyView.
There is an unmet need in metastatic breast cancer patients to monitor therapy response in real time. In this study, we show how a noninvasive and affordable strategy based on sequencing of plasma samples with longitudinal tracking of tumour fraction paired with a statistical model provides valuable information on treatment response in advance of the ...
Emma J. Beddowes, Mario Ortega Duran, Solon Karapanagiotis, Alistair Martin, Meiling Gao, Riccardo Masina, Ramona Woitek, James Tanner, Fleur Tippin, Justine Kane, Jonathan Lay, Anja Brouwer, Stephen‐John Sammut, Suet‐Feung Chin, Davina Gale, Dana W. Y. Tsui, Sarah‐Jane Dawson, Nitzan Rosenfeld, Maurizio Callari, Oscar M. Rueda, Carlos Caldas   +20 more
wiley   +1 more source