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Microrheological model for Kelvin-Voigt materials with micro-heterogeneities.
Soft Matter
January 2025
Departamento de Física, Universidade Federal de Viçosa (UFV), Av. P. H. Rolfs, s/n, 36570-900 Viçosa, Brazil.
We introduce a generalization of the Kelvin-Voigt model in order to include and characterize heterogeneities in viscoelastic semisolid materials. By considering a microrheological approach, we present analytical expressions for the mean square displacement and for the time-dependent diffusion coefficient of probe particles immersed in a viscoelastic material described by this model. Besides validating our theoretical approach through Brownian dynamics simulations, we show how the model can be used to describe experimental data obtained for polyacrylamide and LAPONITE® gels.
View Article and Find Full Text PDFOnline Bayesian State Estimation for Real-Time Monitoring of Growth Kinetics in Thin Film Synthesis.
Nano Lett
January 2025
Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
Rapid validation of newly predicted materials through autonomous synthesis requires real-time adaptive control methods that exploit physics knowledge, a capability that is lacking in most systems. Here, we demonstrate an approach to enable real-time control of thin film synthesis by combining optical diagnostics with a Bayesian state estimation method. We developed a physical model for film growth and applied the direct filter (DF) method for real-time estimation of nucleation and growth rates during pulsed laser deposition (PLD).
View Article and Find Full Text PDFImmunomodulatory Potential of a Bibenzyl-dihydrophenanthrene Derivative Isolated from .
J Nat Prod
January 2025
Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand.
Bibenzyls and dihydrophenanthrenes exhibit promising immunomodulatory effects in various human diseases. In this study, we isolated one new dihydrophenanthrene derivative (), two new bibenzyl-dihydrophenanthrene derivatives () along with 12 known compounds (-) from the methanol extract of . These compounds were identified by using physicochemical analyses and spectroscopic methods.
View Article and Find Full Text PDFChallenges in rural maternal health: how received public services and policy awareness affect health knowledge and practices.
Front Public Health
January 2025
Center for Experimental Economics in Education, Faculty of Education, Shaanxi Normal University, Xi'an, China.
Purpose: This study evaluates the effectiveness of rural maternal health services in improving pregnant women's health knowledge, practices, and outcomes in northwestern China, focusing on the roles of received public services and policy awareness.
Methods: Baseline surveys were conducted in rural Shaanxi Province in 2021 and 2023, involving 1,152 pregnant women from 85 townships, selected via multistage cluster random sampling. Data were collected through structured face-to-face interviews, covering health knowledge and behaviors.
Instance maps as an organising concept for complex experimental workflows as demonstrated for (nano)material safety research.
Beilstein J Nanotechnol
January 2025
Seven Past Nine GmbH, Rebacker 68, 79650 Schopfheim, Germany.
Nanosafety assessment, which seeks to evaluate the risks from exposure to nanoscale materials, spans materials synthesis and characterisation, exposure science, toxicology, and computational approaches, resulting in complex experimental workflows and diverse data types. Managing the data flows, with a focus on provenance (who generated the data and for what purpose) and quality (how was the data generated, using which protocol with which controls), as part of good research output management, is necessary to maximise the reuse potential and value of the data. Instance maps have been developed and evolved to visualise experimental nanosafety workflows and to bridge the gap between the theoretical principles of FAIR (Findable, Accessible, Interoperable and Re-usable) data and the everyday practice of experimental researchers.
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