Article
Microbiology
Carolina N. Keim, Daniel Mendes da Silva, Roger Duarte de Melo, Daniel Acosta-Avalos, Marcos Farina, Henrique Lins de Barros
Summary: The uncultured magnetotactic species 'Candidatus Magnetoglobus multicellularis' consists of spherical, multicellular bacterial cells that can align along magnetic field lines and swim propelled by flagella; their magnetotaxis is due to intracytoplasmic, membrane-bound magnetic crystals called magnetosomes. The behavior of 'Ca. M. multicellularis' near solid boundaries and magnetic grains is complex and possibly involves mechano-taxis, as observed in the study on their swimming trajectories close to solid boundaries using video microscopy.
ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY
(2021)
Article
Chemistry, Physical
Binu Varghese, Sarith P. Sathian
Summary: The formation of interfacial gas enrichment layer and the stability of surface nanobubbles at the solid-liquid interface are closely related. Gas molecules can accumulate into a dense gas layer, surface nanobubble, or other gaseous domains depending on various factors. Molecular dynamics simulations show that gas molecules can migrate and collect together to form surface nanobubbles. These nanobubbles are mobile and maintain their shape when moving over the hydrophobic solid surface. The adsorption of gas on surfaces is strongly affected by the wetting characteristics of the solid. Individual gas adsorption plays a crucial role in the stability of the formed gaseous domains.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Multidisciplinary Sciences
Ding Cao, Mariia Dvoriashyna, Song Liu, Eric Lauga, Yilin Wu
Summary: The study found that in viscoelastic polymer fluids, bacteria swim in less curved trajectories and display reduced near-surface accumulation. The theoretical analysis of non-Newtonian hydrodynamic forces revealed the existence of a lift force near a rigid surface, weakening the hydrodynamic interaction between bacteria and solid surfaces and contributing to a decrease in surface accumulation.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Physical
Md Mahmudur Rahman, Stuart J. Williams
Summary: The study explores the collective behavior of colloidal particles in a non-equilibrium system, with a focus on the influence of external and interparticle forces, including hydrodynamic forces which are often overlooked. Experiment and simulation results show that the particles interact hydrodynamically in a rotating cylindrical cell, forming different structures and evolving based on gravity forces. The findings suggest that the rotation scheme plays a crucial role in determining the aggregation and motion of colloidal particles.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Environmental Sciences
Yimin He, Weichuan Lin, Ce Shi, Ronghua Li, Changkao Mu, Chunlin Wang, Yangfang Ye
Summary: The study found that DBP accumulates in swimming crabs in a concentration-dependent manner and is metabolized to monobutyl phthalate (MBP) and phthalic acid (PA) through de-esterification. Exposure to DBP induced different responses in cytochrome P450 members, antioxidant enzyme genes, and heat stress proteins, leading to malondialdehyde accumulation, decreased glutathione levels, and inhibited antioxidant enzyme activities. Survival, size, and weight of crabs were not significantly affected by DBP, but molting was delayed. Despite this, the study suggests that DBP triggers strong detoxification and antioxidative defense mechanisms in swimming crab juveniles.
Article
Mechanics
G. T. Bokman, L. Biasiori-Poulanges, B. Lukic, C. Bourquard, D. W. Meyer, A. Rack, O. Supponen
Summary: The dynamics of laser-induced cavitation bubbles at different distances from a rigid boundary was studied using high-speed synchrotron x-ray phase-contrast imaging. A specialized experimental chamber was designed to reduce x-ray absorption and mitigate boundary effects. The highly resolved radiographs showed clear bubble interfaces, which could be used as benchmarks for numerical simulations. The measured bubble shapes were compared to simulations using the incompressible boundary integral method. Accurate measurements of the liquid jet speed and the temporal evolution of the bubble cavity were obtained through optical access, and the results were contrasted with simulations. Splashing within the cavity resulting from the jet impact, known as Blake's splashing, was observed and characterized for certain stand-off parameters. Measurements extracted from the visualizations were validated against scaling laws and contributed to confirming and explaining the splashing phenomenon.
Article
Engineering, Marine
Guangsheng Su, Ningyu Li, Hailong Shen, Yumin Su, Yazhou Zhu, Lei Yu, Weixing Liu
Summary: The study investigated the internal ground-effect mechanisms on self-propelled stingrays when moving near substrates. The velocity fluctuation decreased and the pressure regions and vortex size changed when approaching the substrate.
Article
Biotechnology & Applied Microbiology
Jonathan D. Partridge
Summary: The survival and successful spread of many bacterial species depend on their mode of motility, and swarming is a distinct form of collective motility where a dense group of bacteria use flagella to move across solid surfaces. Surface environments present unique challenges due to higher friction/tension and inadequate hydration, and bacteria have developed various mechanisms to overcome these challenges. In addition to enabling bacteria to colonize new terrains without bulk liquid, swarming also provides faster speeds and enhanced antibiotic resistance to the collective, contributing to the dissemination and pathogenicity of different bacterial species.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Mechanics
Alexander Bussmann, Farbod Riahi, Bilal Goekce, Stefan Adami, Stephan Barcikowski, Nikolaus A. Adams
Summary: This study investigates the dynamics of a single cavitation bubble near a horizontal wall during expansion and collapse using a sharp-interface level-set method. A finite-volume formulation with low-dissipation high-order reconstruction schemes is utilized, considering viscosity and surface tension. The simulations are conducted in three-dimensional axi-symmetric space and cover a wide range of initial bubble wall standoff distances. The focus is primarily on the near-wall region.
Article
Biophysics
Gianmarco Lazzini, Luca Romoli, Francesco Fuso
Summary: This study investigates the role of fluid in the initial phase of bacterial adhesion on textured surfaces. It finds that surface protrusions can attract motile bacterial species and increase the range over which they are attracted in the presence of fluid flow.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Review
Gastroenterology & Hepatology
Maria Esteban-Torres, Lorena Ruiz, Valerio Rossini, Ken Nally, Douwe van Sinderen
Summary: The human gut microbiota plays a crucial role in host metabolism and physiology, impacting host health in various ways. This complex microbial community has developed metabolic strategies to survive and thrive in the gut environment. Glycogen accumulation, specifically in gut commensals, has been associated with important physiological functions, and understanding its role can provide insights into the composition and functionality of the gut microbiota.
Article
Forestry
Stephen L. Quarles, Christine Standohar-Alfano, Faraz Hedayati, Daniel J. Gorham
Summary: Embers, also known as firebrands, are the main cause of building ignition during wildland-urban fires. They can directly ignite building materials or indirectly ignite nearby vegetation or combustible materials, resulting in building fires. Factors that influence ember accumulation near a building include building geometry, wind direction, wind speed, and the surface roughness characteristics of the nearby landscape. Experiments using full-scale buildings showed that ember accumulation is highest at locations immediately adjacent to the building, and higher wind speeds allow more embers to reach the building.
INTERNATIONAL JOURNAL OF WILDLAND FIRE
(2023)
Article
Chemistry, Multidisciplinary
Misa Fukushima, Kenta Sato, Yushi Fujimoto, Fuyuki Ito, Ryuzi Katoh
Summary: By using an optical microscope equipped with rotating polarizers, the solid-solid phase transition of perylene single crystals from the beta-phase to the alpha-phase at about 410 K was studied. Fluorescence images revealed that the phase transition process involved the division of beta-phase crystals into several alpha-phase single-crystal domains. Real-time observations showed the clear propagation of the phase boundary between the two phases. Additionally, an optically isotropic phase boundary was observed, which was confirmed through polarization microscopic observations using rapid rotating polarizers. Isotropic areas with dimensions of several tens of micrometers were also occasionally observed, indicating the occurrence of an intermediate amorphous-like state during the phase transition.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Physical
T. Salahuddin, Mair Khan, S. Sakinder, Basem Al Alwan
Summary: This article presents the physical impact of unsteady incompressible hybrid nanofluid Cu - GO=(H2O) - C2H6O2 (50:50 vol%) on thermal performance using the implicit finite difference method. The study reveals that increasing the volume fraction of nanoparticles reduces the velocity profile but increases the temperature profile. The shape of the nanoparticles also affects the heat transfer rate and temperature distribution, with cylindrical particles having the greatest impact.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Physics, Fluids & Plasmas
Ranjiangshang Ran, Quentin Brosseau, Brendan C. Blackwell, Boyang Qin, Rebecca L. Winter, Paulo E. Arratia
Summary: This paper discusses a poster that won the 2021 American Physical Society's Division of Fluid Dynamics (DFD) Gallery of Fluid Motion Award, which can be viewed online.
PHYSICAL REVIEW FLUIDS
(2022)
Article
Microbiology
Gail G. Hardy, Evelyn Toh, Cecile Berne, Yves V. Brun
JOURNAL OF BACTERIOLOGY
(2018)
Article
Microbiology
Erkin Kuru, Carey Lambert, Jonathan Rittichier, Rob Till, Adrien Ducret, Adeline Derouaux, Joe Gray, Jacob Biboy, Waldemar Vollmer, Michael VanNieuwenhze, Yves V. Brun, R. Elizabeth Sockett
NATURE MICROBIOLOGY
(2017)
Article
Microbiology
Tanmay A. M. Bharat, Danguole Kureisaite-Ciziene, Gail G. Hardy, Ellen W. Yu, Jessica M. Devant, Wim J. H. Hagen, Yves V. Brun, John A. G. Briggs, Jan Lowe
NATURE MICROBIOLOGY
(2017)
Article
Biochemistry & Molecular Biology
Nika Pende, Jinglan Wang, Philipp M. Weber, Jolanda Verheul, Erkin Kuru, Simon K. -M. R. Rittmann, Nikolaus Leisch, Michael S. VanNieuwenhze, Yves V. Brun, Tanneke den Blaauwen, Silvia Bulgheresi
Review
Microbiology
Cecile Berne, Courtney K. Ellison, Adrien Ducret, Yves V. Brun
NATURE REVIEWS MICROBIOLOGY
(2018)
Review
Biochemistry & Molecular Biology
Paul D. Caccamo, Yves V. Brun
TRENDS IN MICROBIOLOGY
(2018)
Article
Microbiology
Breah LaSarre, David T. Kysela, Barry D. Stein, Adrien Ducret, Yves V. Brun, James B. McKinlay
Article
Microbiology
Mercedes Hernando-Perez, Sima Setayeshgar, Yifeng Hou, Roger Temam, Yves V. Brun, Bogdan Dragnea, Cecile Berne
Article
Multidisciplinary Sciences
Maxime Jacq, Christopher Arthaud, Sylvie Manuse, Chryslene Mercy, Laure Bellard, Katharina Peters, Benoit Gallet, Jennifer Galindo, Thierry Doan, Waldemar Vollmer, Yves V. Brun, Michael S. VanNieuwenhze, Anne Marie Di Guilmi, Thierry Vernet, Christophe Grangeasse, Cecile Morlot
SCIENTIFIC REPORTS
(2018)
Correction
Microbiology
Erkin Kuru, Carey Lambert, Jonathan Rittichier, Rob Till, Adrien Ducret, Adeline Derouaux, Joe Gray, Jacob Biboy, Waldemar Vollmer, Michael VanNieuwenhze, Yves V. Brun, R. Elizabeth Sockett
NATURE MICROBIOLOGY
(2018)
Article
Microbiology
Courtney K. Ellison, Triana N. Dalia, Alfredo Vidal Ceballos, Joseph Che-Yen Wang, Nicolas Biais, Yves V. Brun, Ankur B. Dalia
NATURE MICROBIOLOGY
(2018)
Article
Ecology
Hongan Long, Way Sung, Sibel Kucukyildirim, Emily Williams, Samuel F. Miller, Wanfeng Guo, Caitlyn Patterson, Colin Gregory, Chloe Strauss, Casey Stone, Cecile Berne, David Kysela, William R. Shoemaker, Mario E. Muscarella, Haiwei Luo, Jay T. Lennon, Yves V. Brun, Michael Lynch
NATURE ECOLOGY & EVOLUTION
(2018)
Article
Biochemistry & Molecular Biology
Cecile Berne, Courtney K. Ellison, Radhika Agarwal, Geoffrey B. Severin, Aretha Fiebig, Robert I. Morton, Christopher M. Waters, Yves V. Brun
MOLECULAR MICROBIOLOGY
(2018)
Article
Microbiology
Nelson K. Chepkwony, Cecile Berne, Yves Brun
JOURNAL OF BACTERIOLOGY
(2019)
Article
Chemistry, Multidisciplinary
Yen-Pang Hsu, Edward Hall, Garrett Booher, Brennan Murphy, Atanas D. Radkov, Jacob Yablonowski, Caitlyn Mulcahey, Laura Alvarez, Felipe Cava, Yves Brun, Erkin Kuru, Michael S. VanNieuwenhze