Results 61 to 70 of about 15,388 (303)
FEBS Letters, EarlyView.Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi +5 more
wiley +1 more source
Courant’s nodal domain theorem for positivity preserving forms
, 2020 We introduce a notion of nodal domains for positivity preserving forms. This notion generalizes the classical ones for Laplacians on domains and on graphs.
Keller, Matthias (Prof. Dr.) +1 more
core +1 more source
Construction of positivity-preserving numerical method for stochastic SIVS epidemic model
Advances in Difference Equations, 2019 In this paper we propose the balanced implicit numerical techniques for maintaining the nonnegative path of the solution in stochastic susceptible–infected–vaccinated–susceptible (SIVS) epidemic model.
Wenrui Li, Qimin Zhang
doaj +1 more source
Organoids in pediatric cancer research
FEBS Letters, EarlyView.Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley +1 more source
Bernstein operators of second kind and blending systems
Journal of Numerical Analysis and Approximation Theory, 2017 We consider the fundamental polynomials associated with the Bernstein operators of second kind. They form a blending system for which we study some shape preserving properties. Modified operators are introduced; they have better interpolation properties.
Daniela Ioana Inoan +2 more
doaj +2 more sources
Ergodic semigroups of positivity preserving self-adjoint operators
, 1973 We prove that an ergodic semigroup of positivity preserving self-adjoint operators is positivity improving. We also present a new proof (using Markov techniques) of the ergodicity of semigroups generated by spatially cutoff P(ϑ)2 ...
Simon, Barry
core +1 more source
Alexandria Engineering Journal, 2023 This work attempts to study the numerical solution of nonlinear delayed Immunized Susceptible Latent Infected and Recovered (MSLIR) epidemic model of HBV disease. Reproduction number, equilibria and stability are discussed.
Muhammad Aziz ur Rehman +8 more
doaj +1 more source
FEBS Letters, EarlyView.We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee +3 more
wiley +1 more source
Symmetric Positivity Preserving Balanced Truncation [PDF]
, 2012 We consider positivity preserving model order reduction of SISO linear systems. Whereas well-established model reduction methods usually do not result in a positive approximation, we show that a symmetry characterization of balanced truncation can be ...
Grussler, Christian, Damm, Tobias
core
An energy stable and positivity-preserving scheme for the Maxwell-Stefan diffusion system
, 2021 We develop a new finite difference scheme for the Maxwell-Stefan diffusion system. The scheme is conservative, energy stable and positivity-preserving.
Tzavaras, Athanasios +3 more
core +1 more source