Results 61 to 70 of about 1,121,626 (305)

Geographic variation in walking activity in the red flour beetle Tribolium castaneum

Population Ecology, EarlyView.
This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley   +1 more source

Making tau amyloid models in vitro: a crucial and underestimated challenge

FEBS Letters, EarlyView.
This review highlights the challenges of producing in vitro amyloid assemblies of the tau protein. We review how accurately the existing protocols mimic tau deposits found in the brain of patients affected with tauopathies. We discuss the important properties that should be considered when forming amyloids and the benchmarks that should be used to ...
Julien Broc, Clara Piersson, Yann Fichou
wiley   +1 more source

Population models with partial migration

, 2015
Populations exhibiting partial migration consist of two groups of individuals: Those that mi- grate between habitats, and those that remain fixed in a single habitat.
De Leenheer, Patrick, Lytle, David A., Mohapatra, Anushaya, Ohms, Haley A.   +3 more
core   +1 more source

Mathematical modelling of internal HIV dynamics [PDF]

, 2009
We study a mathematical model for the viral dynamics of HIV in an infected individual in the presence of HAART. The paper starts with a literature review and then formulates the basic mathematical model.
Dalal, Nirav, Greenhalgh, David, Mao, Xuerong, University of Strathclyde (Funder)   +3 more
core   +1 more source

A stepwise emergence of evolution in the RNA world

FEBS Letters, EarlyView.
How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley   +1 more source

Stability Criteria for SIS Epidemiological Models under Switching Policies [PDF]

, 2014
We study the spread of disease in an SIS model. The model considered is a time-varying, switched model, in which the parameters of the SIS model are subject to abrupt change. We show that the joint spectral radius can be used as a threshold parameter for
Fabian R. Wirth, Mustapha Ait, Oliver Mason, Rami Vahid, S. Bokharaie   +4 more
core   +3 more sources

Evaluating different epidemiological models with the identical basic reproduction number ℛ0

Journal of Biological Dynamics, 2020
Epidemiological models with the identical basic reproduction number $ \mathcal {R}_0 $ may behave differently on both short time scale and long time scale.
Fan Bai
doaj   +1 more source

On the existence of a nontrivial equilibrium in relation to the basic reproductive number [PDF]

International Journal of Applied Mathematics and Computer Science, 2017
AbstractEquilibrium analysis in autonomous evolutionary models is of central importance for developing long term treatments. This task typically includes checks on the existence and stability of some equilibria. Prior to touching on the stability, one often attempts to determine the existence where the basic reproductive numberℛ0plays a critical role ...
Karunia Putra Wijaya, Edy Soewono, Sutimin, Thomas Götz   +3 more
openaire   +3 more sources

The epithelial barrier theory proposes a comprehensive explanation for the origins of allergic and other chronic noncommunicable diseases

FEBS Letters, EarlyView.
Exposure to common noxious agents (1), including allergens, pollutants, and micro‐nanoplastics, can cause epithelial barrier damage (2) in our body's protective linings. This may trigger an immune response to our microbiome (3). The epithelial barrier theory explains how this process can lead to chronic noncommunicable diseases (4) affecting organs ...
Can Zeyneloglu, Huseyn Babayev, Ismail Ogulur, Sena Ardicli, Yagiz Pat, Duygu Yazici, Bingjie Zhao, Lihong Chang, Xiaoqing Liu, Paolo D'Avino, Manru Li, Ceren Biçer, Fatma Hacer Kurtoğlu Babayev, Raja Dhir, Kari C. Nadeau, Marie‐Charlotte Brüggen, Mubeccel Akdis, Cezmi A. Akdis   +17 more
wiley   +1 more source

The linear stability and basic reproduction numbers for autonomous FDEs

Discrete and Continuous Dynamical Systems - S, 2023
In this paper, we first prove the stability equivalence between a linear autonomous and cooperative functional differential equation (FDE) and its associated autonomous and cooperative system without time delay. Then we present the theory of basic reproduction number $\mathcal{R}_0$ for general autonomous FDEs.
openaire   +2 more sources