Publications by authors named "Depeng Ma"
Acoustic emission information can describe the damage degree of rock samples in the process of failure. However, as a discrete non-stationary signal, acoustic emission information is difficult to be effectively processed by conventional methods, while wavelet analysis is an effective method for non-stationary signal processing. Therefore, acoustic emission signal is deeply studied by using wavelet analysis method.
View Article and Find Full Text PDFAggregation-induced emission (AIE) molecules have garnered considerable interest since its first appearance in 2001. Recent studies on AIE materials in biological and medical areas have demonstrated that they show their promise as biomaterials for bioimaging and other biomedical applications. Benefiting from significant advantages of their high sensitivity, excellent photostability, and good biocompatibility, AIE-based materials provide dramatically improved analytical capacities for detection and demonstration of vital biological processes.
View Article and Find Full Text PDFAn Overview of Extracellular Matrix-Based Bioinks for 3D Bioprinting.
Front Bioeng Biotechnol
May 2022
Article Synopsis
- - The extracellular matrix (ECM) is a crucial microenvironment that supports cells, providing structural and biochemical support and helping to reduce foreign body reactions in tissue engineering.
- - Three-dimensional (3D) bioprinting is utilizing ECM-derived bioinks to create complex tissue structures, marking a significant advancement in medical applications like tissue regeneration and cancer research.
- - This review highlights the importance of ECM-based biomaterials in 3D bioprinting, summarizing recent progress and discussing current research and future directions for these innovative materials.
Mechanical and medical imaging properties of 3D-printed materials as tissue equivalent materials.
J Appl Clin Med Phys
February 2022
Article Synopsis
- Three 3D printing materials were studied: polylactic acid (PLA), polyamide 12 (PA12), and light curing resin (LCR), focusing on their mechanical and medical imaging properties.
- The study found that PLA and LCR had elastic moduli similar to certain bones, while PA12 had a higher value; X-ray attenuation decreased with increasing tube voltage across all materials.
- The CT numbers at 120 kV were distinct for each material (PLA: 144, PA12: -88, LCR: 312 Hounsfield units), and the density ranking was LCR > PLA > PA12, with acoustic properties resembling those of soft tissues.
Article Synopsis
- - Continuous online measurement of 99 volatile organic compounds (VOCs) in Beijing showed that although VOC pollution has decreased, levels are still higher compared to other Chinese cities, with total concentrations averaging 44.0 ± 28.9 ppbv.
- - Major sources of VOC emissions include biomass burning, coal combustion, and vehicle emissions, with alkanes being the most prevalent among the sampled compounds; significant temporal variations were observed in their concentrations.
- - The formation of ozone (O) in Beijing is highly influenced by VOC levels, particularly on days with heavy pollution, demonstrating that urban VOC sources and regional transport greatly affect air quality.
Preparation of POSS-min-DS, an octaimidazolium-based polyhedral oligomeric silsesquioxanes (POSS) room temperature ionic liquid, by an ion-exchange reaction between POSS and sodium dodecyl sulfate was reported. Octaimidazolium-based POSS was synthesized with more than 98% yield within 3 h. POSS-min-DS and octaimidazolium-based POSS were confirmed by (1)H, (13)C, and (29)Si NMR, FT-IR and elemental analysis.
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