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Hybrid Soft Segments Boost the Development of Ultratough Thermoplastic Elastomers with Tunable Hardness.
Adv Mater
January 2025
National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, P. R. China.
The hardness of thermoplastic elastomers (TPEs) significantly influences their suitability for various applications, but traditionally, enhancing hardness reduces toughness. Herein a method is introduced that leverages hybrid soft segments to fine-tune the hardness of TPEs without compromising their exceptional toughness. Through the selective copolymerization of polytetramethylene ether glycols (PTMEGs) at various molecular weights, supramolecular poly(urethane-urea) TPEs are molecularly engineered to cover a wide spectrum of hardness while retaining good toughness.
View Article and Find Full Text PDFNumerical analysis of soil deformation in the excavation with loose sand retained by inclined retaining piles.
Sci Rep
December 2024
Department of Civil Engineering, Tianjin University, Tianjin, 300072, China.
Taking the conducted model test by authors as the research object, this paper first carries out detailed numerical analysis and verifies the reliability of the established model. Furthermore, the test phenomenon is explained based on numerical analysis, while parameter analysis is carried out, which mainly includes soil deformation between piles and soil deformation inside and outside excavation. The research results show that when the inclination angle of the piles is small (such as 10°), all or most of the soil (the range of the pile top to 0.
View Article and Find Full Text PDFImmediate Implant Placement in a Hypothyroid Geriatric Patient: Aesthetic Excellence, Secondary Stability, and Successful Outcome-A Case Report.
Plast Aesthet Nurs (Phila)
December 2024
Sowmya Srinivas, BDS, MDS, PhD, is an Assistant Professor at the Department of Prosthodontics, JSS Dental College and Hospital, JSS Academy of Higher Education and Research, Mysore, Karnataka, India.
Placing an implant immediately into extraction sockets provides a distinct advantage over delayed placement, eliminating the need for a 4 to 6 months waiting period for bone formation. However, when patients present with hypothyroidism, the feasibility of immediate placement of dental implants becomes uncertain. This case involved a hypothyroid woman in her late 60s with loose lower anterior teeth.
View Article and Find Full Text PDFEvolutionary and functional divergence of Sfx, a plasmid-encoded H-NS homolog, underlies the regulation of IncX plasmid conjugation.
mBio
December 2024
Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.
Conjugative plasmids are widespread among prokaryotes, highlighting their evolutionary success. Conjugation systems on most natural plasmids are repressed by default. The negative regulation of F-plasmid conjugation is partially mediated by the chromosomal nucleoid-structuring protein (H-NS).
View Article and Find Full Text PDFQualitative investigation into the functional problems of transtibial prostheses when amputees perform agricultural work.
Prosthet Orthot Int
December 2024
Health Rehabilitation Group (GRES), Department of Physical Medicine and Rehabilitation, School of Medicine, University of Antioquia, Medellín, Colombia.
Background: A significant number of Colombian farmers who are transtibial amputees are civilian victims of landmines. Current prostheses are inadequately adapted for agricultural work, resulting in functional challenges in this context.
Objectives: This study aims to analyze and categorize the functional problems of transtibial prostheses in the Colombian agricultural context, incorporating perspectives from prosthesis users, manufacturers, and designers.
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