Article
Chemistry, Applied
Ioanna Zafeiri, Akash Beri, Bruce Linter, Ian Norton
Summary: This study investigated the mechanical behavior of alginate-based composite particles, revealing the impact of alginate-to-starch ratios on particle properties and the influence of heating on starch granule swelling within the particles. The study found that Young's modulus increased only with heated starch inclusions, highlighting the importance of microscopy for interpreting mechanical measurements.
CARBOHYDRATE POLYMERS
(2021)
Article
Plant Sciences
David Stuart Thompson, Azharul Islam
Summary: The extensibility of synthetic polymers and plant cell walls can be modulated by plasticizers and water, affecting their hydration and behavior, potentially leading to physiological consequences and strategies to improve crop resilience. Expansins play a role in facilitating rehydration and swelling of these materials, showing that the relationship between water potential and hydration is influenced by composition.
Article
Chemistry, Multidisciplinary
Dulce Estefania Nicolas-Alvarez, Jose Alberto Andraca-Adame, Jose Jorge Chanona-Perez, Juan Vicente Mendez-Mendez, Raul Borja-Urby, Nicolas Cayetano-Castro, Hugo Martinez-Gutierrez, Primavera Lopez-Salazar
Summary: This study investigated the morphological and mechanical changes in tomato root tissues exposed to TiO2 nanoparticles, revealing that the parenchyma tissue area significantly increased while the epidermis and vascular bundles became softer. Additionally, TiO2 nanoparticles were found to be internalized in the root tissue, accumulating in cell walls and intercellular spaces.
Article
Materials Science, Multidisciplinary
Nejc Novak, Olly Duncan, Tom Allen, Andrew Alderson, Matej Vesenjak, Zoran Ren
Summary: This study analyzed the shear moduli of conventional and auxetic open-cell polymer foams, finding that the measured shear moduli of auxetic foams were generally lower, and the calculated shear moduli were lower than the measured values.
MECHANICS OF MATERIALS
(2021)
Article
Polymer Science
Takafumi Aizawa
Summary: The Carbon dioxide (CO2)-assisted polymer compression method is used to plasticize and crimp polymer fibers. The degree of plasticization is crucial for this method. In this study, heat treatment was applied to obtain fibers with different degrees of crystallinity. The compression degree and hardness were compared using two types of sheets. The Young's modulus of porous polymers in the presence of CO2 varies significantly with slight differences in crystallinity, highlighting the importance of low crystallinity for polymer plasticization by CO2.
Article
Nanoscience & Nanotechnology
Nicola Manca, Gaia Tarsi, Alexei Kalaboukhov, Francesco Bisio, Federico Caglieris, Floriana Lombardi, Daniele Marre, Luca Pellegrino
Summary: In this study, suspended micro-mechanical structures were successfully fabricated from nanometer-thick ETO films, and their mechanical properties were characterized. Temperature-dependent measurements revealed a non-monotonic and hysteretic mechanical response in the ETO films. Additionally, the influence of oxygen vacancies on the mechanical properties was investigated by comparing stoichiometric and oxygen-deficient samples.
Article
Nanoscience & Nanotechnology
Snigdha S. Jagarlapudi, Heaven S. Cross, Tridip Das, William A. Goddard
Summary: Environmental and toxicity concerns necessitate the replacement of DEHP plasticizer with potential alternatives such as DHS, DEA, 1,4-BDB, and DBS for PVC. The comparison of their tensile, mechanical, and diffusional properties is crucial in determining their competitiveness. This study predicts the effects of these plasticizers on various properties of PVC, and concludes that DBS and DHS show promising potential as green plasticizers for PVC.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Mohammad Azeeb Mazlan, Mohamad Azizi Anas, Nor Aiman Nor Izmin, Abdul Halim Abdullah
Summary: Three-dimensional printing is widely used in various fields and the study focuses on achieving the optimal weight-to-performance ratio for 3D-printed parts. The material and printing parameters, such as infill density, wall perimeter, and layer height, significantly affect the end products. The study is divided into simulation analysis and experimental analysis to determine the trend of Young's modulus for the material, and any differences between the results are analyzed and discussed. The results demonstrate that increasing these parameters enhances the tensile elasticity of the parts.
Article
Cell Biology
Sergey Dubkov, Aleksei Overchenko, Denis Novikov, Vasilii Kolmogorov, Lidiya Volkova, Petr Gorelkin, Alexander Erofeev, Yuri Parkhomenko
Summary: This study presents an original technique for fabricating silver-coated pipettes and explores their use in cell analysis through surface-enhanced Raman spectroscopy and scanning ion-conducting microscopy. The results demonstrate the potential of this method for molecular composition analysis of living cells.
Article
Chemistry, Multidisciplinary
Julian Kund, Sven Daboss, Tommaso Marchesi D'Alvise, Sean Harvey, Christopher V. Synatschke, Tanja Weil, Christine Kranz
Summary: In this study, the physical and electrochemical properties of electrochemically deposited PDA films obtained by cyclic voltammetry or pulsed deposition were evaluated. The research focused on the electron transfer kinetics, charge transfer resistance, Young's modulus, and adhesion forces of the films under different experimental conditions. Significant differences were observed between films obtained by different deposition methods, indicating that pulse deposition leads to denser, more cross-linked films.
Article
Multidisciplinary Sciences
Chi Zhang, Mingyang Chen, Sinan Keten, Benoit Coasne, Dominique Derome, Jan Carmeliet
Summary: Wood hygromechanics mechanisms remain unclear due to nanoscopic system size and highly coupled physics. This study uses molecular dynamics simulations to characterize wood polymers, revealing the dominating role of cellulose fiber in wood cell wall mechanics. The moisture-induced anisotropic swelling and weakening of wood cell wall is governed by the interplay of cellulose reinforcement, mechanical degradation of matrix, and fiber-matrix interface.
Article
Biophysics
Leqian Zhao, Xingliang Fu, Liyuan Zhang, Zhiyi Ye
Summary: Mechanical properties play crucial roles in the immune system, affecting the activation, transformation, and effector responses of immune cells. This study investigated the elasticity of Jurkat cells and the adhesion properties between integrins and VCAM-1 using atomic force microscopy. The results demonstrated the relationship between cytoskeleton and integrin-ligand through mechanical characteristics.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Acoustics
Yan-Jing Guo, Xiao-Jing Yan, Hai-Xia Zhao, Xiao-Duo Wen, Jing Wang, Yuan-Yuan Du, Nan Wang, Yi Yang
Summary: Ultrasound real-time shear wave elastography has clinical application value in the diagnosis of cervical cancer.
JOURNAL OF ULTRASOUND IN MEDICINE
(2023)
Article
Polymer Science
Ferran Serra-Parareda, Fabiola Vilaseca, Roberto Aguado, Francesc X. Espinach, Quim Tarres, Marc Delgado-Aguilar
Summary: The study estimated the Young's modulus of henequen fibers in PP-based composites through micromechanical modeling and single filament tensile testing, confirming the potential of henequen fibers as reinforcement for PP. Adding 4% of maleic anhydride grafted polypropylene improved interfacial adhesion and increased the composite's Young's modulus up to 6.4 GPa at 50 wt.% fiber content. Henequen fibers exhibited a comparable stiffening capacity to glass fibers, and established models predicted intrinsic Young's modulus values of 30.5 and 34.6 GPa, with a corrected modulus of 33.3 GPa from filament testing.
Article
Engineering, Biomedical
Guanglin Zhang, Haoyu Xue, Dazheng Sun, Shenyu Yang, Mei Tu, Rong Zeng
Summary: Soft D-PSLs can persistently bind to macrophage membranes and enhance the anti-inflammatory and pro-healing responses of macrophages, shedding new light on the design of therapeutic biomaterials based on regulating macrophages and providing a promising biomimetic nano-therapeutic approach for chronic inflammatory injury.
ACTA BIOMATERIALIA
(2021)