Article
Physics, Fluids & Plasmas
Jae Hyung Cho, Irmgard Bischofberger
Summary: The study uses differential dynamic microscopy to investigate the thermal fluctuations of colloidal gels formed by strongly attractive particles at low volume fractions and decomposes them into two modes of dynamics, eventually linking them to macroscopic viscoelasticity via rheometry. Mixing two types of particles of distinct attraction strengths in different proportions allows control over the frequency dependence of the linear viscoelastic moduli of the binary gels by tuning the transition time at which the collective mode starts to dominate.
Article
Materials Science, Multidisciplinary
Yuji Kimura, Shoichi Shimizu, Kazutoshi Haraguchi
Summary: Exfoliated clay nanosheets (CNSs) of synthetic hectorite have been used to synthesize advanced functional materials and gels with unique characteristics. Viscosity changes in aqueous dispersions of hectorite were measured using a vibration viscometer, revealing maximum viscosity accompanied by gelation under certain pH and salt concentration conditions. Anomalous viscosity dynamics were observed in static dispersions, depending on various factors such as clay type, acid (salt), temperature, repetitions, and agitation conditions.
NPG ASIA MATERIALS
(2022)
Article
Chemistry, Applied
Hwabin Jung, Lester C. Geonzon, Won Byong Yoon, Shingo Matsukawa
Summary: The gelation mechanism of agarose solution on cooling was investigated using a dynamic rheometer, multiple particle tracking, and pulsed-field-gradient stimulated echo (PGSTE) 1H NMR. The results revealed the gradual increase of G' and the formation of micro domains obstructing particle diffusion in the temperature range from 55 to 40 degrees C. Detailed information about the change of molecular mobility and the overall network structure was obtained from NMR measurements. These findings provide insights into the gelation mechanism and gel network structure of agarose solution.
FOOD HYDROCOLLOIDS
(2023)
Article
Chemistry, Applied
Lester C. Geonzon, Amos M. Santoya, Hwabin Jung, Hannah Yuson, Rommel G. Bacabac, Shingo Matsukawa
Summary: The network structure of mixed kappa- (KC) and iota- (IC) carrageenan gels was found to exhibit spatial heterogeneity in particle diffusion, with fast-moving particles in IC-rich domains and slow-moving particles in KC-rich domains. Confinement events were observed, attributed to interactions between particles and KC-rich domains covered with negatively charged sulfonic group KC chains, shielded by salt ions to allow cohesive interactions.
FOOD HYDROCOLLOIDS
(2022)
Article
Chemistry, Multidisciplinary
Hansen Zhao, Feng Ge, Sichun Zhang, Xinrong Zhang, Yan He
Summary: The study introduces a modeless preprocessing framework for single particle tracking (SPT) analysis based on the historical information of the particles. By assigning history to each data point and performing unsupervised clustering in the vector space, the inner heterogeneity of particle motion emerges as a colored trajectory, providing valuable information for further model-based analysis.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Plant Sciences
Jingjing Xing, Dongchao Ji, Zhikun Duan, Tong Chen, Xiaomin Luo
Summary: The plant receptor-like kinase FERONIA (FER) plays multiple roles in regulating cellular processes such as cell growth, hormone signaling and response to pathogens. This study found that flg22 stimulus promotes the dissociation of FER from the plasma membrane and its localization to endosomes. FER undergoes constitutive endocytosis and recycling, and is essential for flg22 perception and immune activation.
Article
Physics, Fluids & Plasmas
Javier A. S. Gallegos, Roman Perdomo-Perez, Nestor Enrique Valadez-Perez, Ramon Castaneda-Priego
Summary: This study discusses the physical mechanisms behind the gel transition in colloidal dispersions, suggesting rigidity percolation as a precursor to colloidal gelation. The criterion (n(b)) = 2.4 is found to be applicable in both attractive spherocylinders and patchy colloids systems. The research highlights that not all combinations of patches and coverages lead to a gel-like state.
Article
Environmental Sciences
Calvin N. Quigley, Moninya Roughan, Romain Chaput, Andrew G. Jeffs, Jonathan P. A. Gardner
Summary: Understanding ocean currents' impact on larval transport is crucial for studying population connectivity in marine invertebrates. This study examined population connectivity in New Zealand green-lipped mussels using particle tracking experiments and compared it with genetic data. The results showed a significant correlation between oceanographic circulation and genetic structure, suggesting the importance of hydrodynamic processes. However, no evidence of an oceanographic barrier was found in the Cook Strait region.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Chemistry, Physical
Fabian A. Garcia Daza, Antonio M. Puertas, Alejandro Cuetos, Alessandro Patti
Summary: The rheology of colloidal suspensions is important in formulation technology and fundamental science, and microrheology has emerged as a tool to assess materials at the microscopic level. In this study, we used dynamic Monte Carlo simulations to investigate the viscoelasticity of self-assembling smectic liquid crystals using active microrheology. The results show that the mechanical properties are influenced by the size of the particles and the directionality of the external forces.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2023)
Article
Agriculture, Dairy & Animal Science
Gunvantsinh Rathod, Daniel L. Boyle, J. K. Amamcharla
Summary: The fibrillated model MPC produced a firmer acid gel compared to the control model MPC, indicating that selectively fibrillating the whey protein fraction in MPC can improve gelation characteristics.
JOURNAL OF DAIRY SCIENCE
(2022)
Article
Mechanics
Claude Oelschlaeger, Jonas Marten, Florian Peridont, Norbert Willenbacher
Summary: We developed a new data analysis strategy called micro-rheo-mapping technique to visualize the microstructure of commercial acrylate thickeners. The study found that the thickeners have heterogeneous microstructures with varying degrees of crosslinking. The research also established a correlation between microstructure and macroelasticity.
JOURNAL OF RHEOLOGY
(2022)
Article
Environmental Sciences
Xiaowei Hu, Wenhao Hou, Zhaojun Sheng, Yanbin Xi, Jiaxuan Yu, Ruijin Zhang
Summary: A comprehensive model was used to simulate the environmental characteristics of Liaodong Bay, and a suitable habitat for stock enhancement of Portunus trituberculatus larvae was identified. The study revealed that the actual area available for stock enhancement is small and precise release strategies are needed.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Hojung You, Rafael O. O. Tinoco
Summary: Underwater obstacles are known to be hotspots for various particulate matters in streams. This study examines the particle behaviors as they pass through a gap between two obstacles, and identifies the impact of gap length on the particle transport. The results show that the transport of particles is influenced by large-scale flow motions, and understanding these patterns can help in effective sampling and monitoring of organic and inorganic particles in aquatic environments.
WATER RESOURCES RESEARCH
(2023)
Article
Computer Science, Artificial Intelligence
Jesus Pineda, Benjamin Midtvedt, Harshith Bachimanchi, Sergio Noe, Daniel Midtvedt, Giovanni Volpe, Carlo Manzo
Summary: Despite recent improvements in microscopy acquisition methods, extracting quantitative information from biological experiments in crowded conditions is a challenging task. Pineda and colleagues propose a geometric deep-learning-based framework for automated trajectory linking and dynamical property estimation that is able to effectively deal with complex biological scenarios.
NATURE MACHINE INTELLIGENCE
(2023)
Article
Environmental Sciences
Moninya Roughan, Paulina Cetina-Heredia, Nina Ribbat, Iain M. Suthers
Summary: The region where the East Australian Current separates from the coast is influenced by mesoscale circulation, with different circulation modes leading to varying upwelling, retention, or export. The sources and pathways of water transport are also affected by the mesoscale circulation. The highest proportion of upwelling occurs upstream of 32.5 degrees S, while the highest retention occurs immediately downstream of the EAC separation region.
FRONTIERS IN MARINE SCIENCE
(2022)
