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Experiments to simulate the salinisation process of loess under a dynamic water cycle.
Environ Res
January 2025
State Key Laboratory of Continental Dynamics, Northwest University, Xi'an, 710069, China.
Addressing loess salinisation is a crucial element in preserving ecological stability and fostering sustainable development in the northwest Loess Plateau. To investigate the impacts of salt solution on the properties of loess, independently designed salt solution-loess dynamic cyclic erosion equipment was used to soak the loess. Then, numerous tests were performed to analyse the variability of the effects of salt solution concentrations (SSC) and type, as well as the duration of soaking time, on these physico-mechanical properties.
View Article and Find Full Text PDFBackground: Batoids possess a unique body plan associated with a benthic lifestyle that includes dorsoventral compression and anteriorly expanded pectoral fins that fuse to the rostrum. The family Myliobatidae, including manta rays and their relatives, exhibit further modifications associated with invasion of the pelagic environment, and the evolution of underwater flight. Notably, the pectoral fins are split into two domains with independent functions that are optimized for feeding and oscillatory locomotion.
View Article and Find Full Text PDFThe effects of process parameters on the mechanical properties and degradation behavior of Fe/HA biodegradable materials.
J Biomater Appl
December 2024
Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China.
HA/Fe composites were prepared by powder metallurgy. The effects of ball milling time, pressing pressure, and sintering temperature on the porosity and hardness of the composites were investigated, and their mechanical properties and biocompatibility were evaluated. The results show that as the ball milling time increases (30∼60min), the average particle size initially decreases and then increases (82.
View Article and Find Full Text PDFEfficient utilization of waste drilling mud to prepare material stabilized with fly ash/slag based geopolymer for subgrade engineering.
J Environ Manage
December 2024
School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou, Henan, 450001, China.
Article Synopsis
- The study explores the use of industrial waste drilling mud in construction, specifically stabilizing it with geopolymer derived from fly ash/slag to create environmentally friendly road base materials.
- Mechanical tests demonstrated that increasing slag powder content significantly improved the strength and toughness of the geopolymer stabilized drilling mud, with notable increases in various strength metrics when comparing 60% and 100% slag powder compositions.
- Despite some reduction in water stability and durability with higher slag content, all samples still met pavement design standards, indicating the potential for effective resource utilization and environmental sustainability through this method.
Degradation and Fatigue Behavior of 3D-Printed Bioresorbable Tracheal Splints.
J Biomed Mater Res B Appl Biomater
December 2024
J. Vernon Luck, Sr., M.D. Orthopaedic Research Center, Luskin Orthopaedic Institute for Children in Alliance With UCLA, Los Angeles, California, USA.
Severe infantile tracheobronchomalacia (TBM) is often treated with invasive surgery and fixed-size implants to support the trachea during respiration. A novel 3D-printed extra-luminal splint has been developed as a flexible and bioresorbable alternative. Therefore, the goal of the present study was to use an in vitro breathing simulator model to comprehensively evaluate the structural stiffness and failure modes of two sizes of a novel bioresorbable 3D-printed splint design under a range of physiological degradation conditions.
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