Results 21 to 30 of about 6,861,845 (296)
Enterococcus faecalis modulates phase variation in Clostridioides difficile [PDF]
Journal of BacteriologyTo adapt and persist in the gastrointestinal tract, many enteric pathogens, including Clostridioides difficile, employ strategies such as phase variation to generate phenotypically heterogeneous populations.
Ashley S. Weiss +6 more
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Phase Variation of Streptococcus pneumoniae. [PDF]
Microbiol Spectr, 2019 ABSTRACTStreptococcus pneumoniaeundergoes phase variation or spontaneous, reversible phenotypic variation in colony opacity, encapsulation, and pilus expression. The variation in colony opacity appears to occur in all strains, whereas the switches in the production of the capsule and pilus have been observed in several strains.
Li J, Zhang JR.
europepmc +3 more sources
Phase and Antigenic Variation in Bacteria [PDF]
Clinical Microbiology Reviews, 2004 SUMMARYPhase and antigenic variation result in a heterogenic phenotype of a clonal bacterial population, in which individual cells either express the phase-variable protein(s) or not, or express one of multiple antigenic forms of the protein, respectively.
Marjan W, van der Woude +1 more
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A Variational Model for Wrapped Phase Denoising
Mathematics, 2023 This paper presents a variational model for the denoising of wrapped phase images. By enforcing the required Pythagorean trigonometric identity between the real and imaginary components of the signal, this model improves the signal-to-noise ratio of the restored signal. To preserve phase map discontinuities, the model is based on total variation.
Ivan May-Cen +2 more
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Phase variation in the genus Serratia [PDF]
Journal of Medical Microbiology, 1980 During an investigation of the serotypes of Serratia marcescens present in a cancer centre, it was found that 8.7% of 241 strains had more than one H antigen. There were 19 diphasic and two triphasic strains. Antigen H1 was a component of the phases in the approximately half of the strains with multiple phases.
V M, Young, M R, Moody, M J, Morris
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Regional variation in the pronunciation of /s/ in the Dutch language area [PDF]
, 2019 This paper reports on an explorative sociophonetic study of the phoneme /s/ in the Dutch language area. Our aim is to investigate the regional variation in the realisation of this phoneme, and to test experimentally the observation of Collins & Mees ...
Heeren, W.F.L. +6 more
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Variational Hilbert Quantitative Phase Imaging [PDF]
Scientific Reports, 2020 AbstractUtilizing the refractive index as the endogenous contrast agent to noninvasively study transparent cells is a working principle of emerging quantitative phase imaging (QPI). In this contribution, we propose the Variational Hilbert Quantitative Phase Imaging (VHQPI)—end-to-end purely computational add-on module able to improve performance of a ...
Trusiak, Maciej +6 more
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Phase regeneration of an M-PSK signal using partial regeneration of its M/2-PSK second phase harmonic [PDF]
, 2015 We propose and numerically investigate a phase regeneration technique that allows an M-PSK signal to be phase regenerated by an M/2-PSK (or even M/4-PSK) phase regenerator (applicable for M = 2k, with k an integer). This scheme comprises three main parts;
Parmigiani, Francesca +3 more
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Aspects of Linguistic Variation [PDF]
, 2018 This volume brings together papers on linguistic variation. It takes a broad perspective, covering not only crosslinguistic and diachronic but also intralinguistic and interspeaker variation, and examines phenomena ranging from negation and TAM over ...
core +1 more source
Riboregulation in the Major Gastric Pathogen Helicobacter pylori
Frontiers in Microbiology, 2021 Helicobacter pylori is a Gram-negative bacterial pathogen that colonizes the stomach of about half of the human population worldwide. Infection by H.
Alejandro Tejada-Arranz +2 more
doaj +1 more source