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View article: Physiochemical Characterization of the Graft Copolymerization of Acrylamide and Acrylonitrile onto Sodium Alginate by Ceric-Ion/Allyl Alcohol Redox Pair
Physiochemical Characterization of the Graft Copolymerization of Acrylamide and Acrylonitrile onto Sodium Alginate by Ceric-Ion/Allyl Alcohol Redox Pair Open
Sodium alginate was chemically modified via graft copolymerization with acrylamide and acrylonitrile via a ceric ion allyl alcohol redox system in aqueous media. The synthesized graft copolymers were characterized via viscometry, Fourier t…
View article: Knowledge of nutrition facts on food labels and their impact on food choices on consumers
Knowledge of nutrition facts on food labels and their impact on food choices on consumers Open
Food labels are mandatory on all food products since they contain nutrition information to help consumers make informed dietary decisions. Although food labels are widely available, many consumers struggle to fully understand the informati…
View article: Active bacterial baths in droplets
Active bacterial baths in droplets Open
Suspensions of self-propelled objects represent a novel paradigm in colloidal science. In such “active baths,” traditional concepts such as Brownian motion, fluctuation–dissipation relations, and work extraction from heat reservoirs, must …
View article: Disruption of IgA-mediated aggregation at weaning favors mucus encroachment by commensal bacteria
Disruption of IgA-mediated aggregation at weaning favors mucus encroachment by commensal bacteria Open
Disruption of the gut mucus barrier is a critical step in the development of infec-tious or chronic inflammatory diseases. However, there are no clear links between developmental stages, diet, and the mechanical and biochemical properties …
View article: Antibiotic resistance of Vibrio cholerae isolated from environmental water and clinical samples
Antibiotic resistance of Vibrio cholerae isolated from environmental water and clinical samples Open
Vibrio species are classified as potential hazards because of their tendency to impart serious diseases that can cause death if not well treated. The symptoms associated with a Vibrio spp. infection are usually gastrointestinal, commonly e…
View article: Run-and-tumble dynamics of <i>Escherichia coli</i> is governed by its mechanical properties
Run-and-tumble dynamics of <i>Escherichia coli</i> is governed by its mechanical properties Open
The huge variety of microorganisms motivates fundamental studies of their behaviour with the possibility to construct artificial mimics. A prominent example is the Escherichia coli bacterium, which employs several helical flagella to exhib…
View article: Medium-assisted tumbling controls bacteria exploration in a complex fluid
Medium-assisted tumbling controls bacteria exploration in a complex fluid Open
In nature, many fluids that harbor bacterial populations or protect against microbial contamination exhibit non-Newtonian rheology. To study the spatial exploration of E . coli bacteria, a model multi-flagellated microorganism, in such com…
View article: Confinement controls bacterial spreading at all scales
Confinement controls bacterial spreading at all scales Open
Navigation of microorganisms is controlled by internal processes ultimately sensitive to mechanical or chemical signaling encountered along the path. In many natural environments, such as porous soils or physiological ducts, motile species…
View article: The 2025 motile active matter roadmap
The 2025 motile active matter roadmap Open
Activity and autonomous motion are fundamental aspects of many living and engineering systems. Here, the scale of biological agents covers a wide range, from nanomotors, cytoskeleton, and cells, to insects, fish, birds, and people. Inspire…
View article: Run-and-tumble dynamics of <i>E. coli</i> is governed by its mechanical properties
Run-and-tumble dynamics of <i>E. coli</i> is governed by its mechanical properties Open
The huge variety of microorganisms motivates fundamental studies of their behavior with a possibility to construct artificial mimics. A prominent example is the E. coli bacterium which employs several helical flagella to exhibit a motility…
View article: The 2024 Motile Active Matter Roadmap
The 2024 Motile Active Matter Roadmap Open
Activity and autonomous motion are fundamental aspects of many living and engineering systems. Here, the scale of biological agents covers a wide range, from nanomotors, cytoskeleton, and cells, to insects, fish, birds, and people. Inspire…
View article: Evolving motility of active droplets is captured by a self-repelling random walk model
Evolving motility of active droplets is captured by a self-repelling random walk model Open
Swimming droplets are a class of active particles whose motility changes as a function of time due to shrinkage and self-avoidance of their trail. Here we combine experiments and theory to show that our non-Markovian droplet (NMD) model, a…
View article: Recovering the activity parameters of an active fluid confined in a sphere
Recovering the activity parameters of an active fluid confined in a sphere Open
The properties of an active fluid, for example, a bacterial bath or a collection of microtubules and molecular motors, can be accessed through the dynamics of passive particle probes. Here, in the perspective of analyzing experimental situ…
View article: Frustrated ‘run and tumble’ of swimming <i>Escherichia coli</i> bacteria in nematic liquid crystals
Frustrated ‘run and tumble’ of swimming <i>Escherichia coli</i> bacteria in nematic liquid crystals Open
In many situations, bacteria move in complex environments, as soils, oceans or the human gut-track, where carrier fluids show complex structures associated with non-Newtonian rheology. Many fundamental questions concerning the ability to n…
View article: Dispersion of motile bacteria in a porous medium
Dispersion of motile bacteria in a porous medium Open
Understanding flow and transport of bacteria in porous media is crucial to technologies such as bioremediation, biomineralization and enhanced oil recovery. While physicochemical bacteria filtration is well documented, recent studies showe…
View article: Frustrated run and tumble of swimming E-coli bacteria in nematic liquid crystals
Frustrated run and tumble of swimming E-coli bacteria in nematic liquid crystals Open
In many situations bacteria move in complex environments, as for example in soils, oceans or the human gut-track microbiome. In these natural environments, carrier fluids such as mucus or reproductive fluids show complex structure associat…
View article: Run-to-Tumble Variability Controls the Surface Residence Times of <i>E. coli</i> Bacteria
Run-to-Tumble Variability Controls the Surface Residence Times of <i>E. coli</i> Bacteria Open
Motile bacteria are known to accumulate at surfaces, eventually leading to changes in bacterial motility and biofilm formation. We use a novel two-color, three-dimensional Lagrangian tracking technique to follow simultaneously the body and…
View article: Dispersion of motile bacteria in a porous medium: Experimental data and theory
Dispersion of motile bacteria in a porous medium: Experimental data and theory Open
<p>The sound understanding and quantification of the transport and dispersion<br>mechanisms of bacteria in porous media is of central concern in applications<br>such as bioremediation and biomineralization. Recent experim…
View article: Topological properties of Floquet winding bands in a photonic lattice
Topological properties of Floquet winding bands in a photonic lattice Open
The engineering of synthetic materials characterised by more than one class of topological invariants is one of the current challenges of solid-state based and synthetic materials. Using a synthetic photonic lattice implemented in a two-co…
View article: DataSI from Frustrated ‘run and tumble’ of swimming Escherichia coli bacteria in nematic liquid crystals
DataSI from Frustrated ‘run and tumble’ of swimming Escherichia coli bacteria in nematic liquid crystals Open
In many situations, bacteria move in complex environments, as soils, oceans or the human gut-track, where carrier fluids show complex structures associated with non-Newtonian rheology. Many fundamental questions concerning the ability to n…
View article: Single-trajectory characterization of active swimmers in a flow
Single-trajectory characterization of active swimmers in a flow Open
We develop a maximum likelihood method to infer relevant physical properties of elongated active particles. Using individual trajectories of advected swimmers as input, we are able to accurately determine their rotational diffusion coeffic…
View article: Chirality-induced bacterial rheotaxis in bulk shear flows
Chirality-induced bacterial rheotaxis in bulk shear flows Open
Experimental orientation distributions reveal scaling laws of bacterial rheotaxis explained using noisy dynamical systems.
View article: 3D Spatial Exploration by <i>E. coli</i> Echoes Motor Temporal Variability
3D Spatial Exploration by <i>E. coli</i> Echoes Motor Temporal Variability Open
Unraveling bacterial strategies for spatial exploration is crucial for understanding the complexity in the organization of life. Bacterial motility determines the spatiotemporal structure of microbial and controls infection spreading and t…
View article: Swimming-induced non-Fickian transport of bacteria in porous media
Swimming-induced non-Fickian transport of bacteria in porous media Open
<p>Progress in experimental techniques and imaging methods have led to a leap in the understanding of&#160;<br>microscopic transport and swimming mechanisms of motile particles in porous media. This is very different&#1…
View article: A combined rheometry and imaging study of viscosity reduction in bacterial suspensions
A combined rheometry and imaging study of viscosity reduction in bacterial suspensions Open
Suspending self-propelled “pushers” in a liquid lowers its viscosity. We study how this phenomenon depends on system size in bacterial suspensions using bulk rheometry and particle-tracking rheoimaging. Above the critical bacterial volume …
View article: Dataset for: "A combined rheometry and imaging study of viscosity reduction in bacterial suspensions"
Dataset for: "A combined rheometry and imaging study of viscosity reduction in bacterial suspensions" Open
Dataset supporting the manuscript "A combined rheometry and imaging study of viscosity reduction in bacterial suspensions" accepted in PNAS.
View article: Following in the footsteps of E. coli: sperm in microfluidic "strictures"
Following in the footsteps of E. coli: sperm in microfluidic "strictures" Open
We briefly describe the similarities of the experiments of sperm motion in microfluidic "strictures" by Zafeeani et al. in 2019 (Sci. Adv. 5, eaav21111, 2019) and those by Altshuler et al. in 2013 (Soft Matter 9, 1864, 2013). We shortly di…
View article: Bacterium swimming in Poiseuille flow: the quest for active Bretherton-Jeffery trajectories
Bacterium swimming in Poiseuille flow: the quest for active Bretherton-Jeffery trajectories Open
Using a 3D Lagrangian tracking technique, we determine experimentally the trajectories of non-tumbling ${\it E. coli}$ mutants swimming in a Poiseuille flow. We identify a typology of trajectories in agreement with a kinematic active Breth…