A5016743278- Bone Tissue Engineering Materials
- Dental materials and restorations
- Dental Implant Techniques and Outcomes
- Gyrotron and Vacuum Electronics Research
- Pulsed Power Technology Applications
- Dental Erosion and Treatment
- Polymer Nanocomposites and Properties
- Particle accelerators and beam dynamics
- Microwave Engineering and Waveguides
- Orthopaedic implants and arthroplasty
- Liquid Crystal Research Advancements
- Advanced materials and composites
- Synthesis and properties of polymers
- Endodontics and Root Canal Treatments
- Electrospun Nanofibers in Biomedical Applications
- High-Temperature Coating Behaviors
- Calcium Carbonate Crystallization and Inhibition
- Inorganic Fluorides and Related Compounds
- Corrosion Behavior and Inhibition
- 3D Printing in Biomedical Research
- biodegradable polymer synthesis and properties
- Polymer crystallization and properties
- Metal Extraction and Bioleaching
- Facial Trauma and Fracture Management
- Extraction and Separation Processes
Center for Devices and Radiological Health
2018-2023
China Academy of Engineering Physics
2022-2023
United States Food and Drug Administration
2018-2022
Zhengzhou Business University
2020-2021
Beijing Institute of Technology
2021
Craft Group (China)
2021
National Institute of Standards and Technology
2005-2012
Central South University
2012
American Dental Association
2005-2012
Central South University of Forestry and Technology
2012
The ice nucleating efficiency of many important atmospheric particles remains poorly understood. Here we investigate the nucleation properties a range soot types including that has been treated with atmospherically relevant amounts ozone. We focus on deposition below water saturation and at temperatures ranging from 243 to 258 K. For our experimental conditions, never occurred above 248 K saturation. Below K, occasionally formed in experiments no indication formation droplets prior...
Abstract Dental composites do not hinder bacteria colonization and plaque formation. Caries at the restoration margins is a frequent reason for replacement of existing restorations, which accounts 50 to 70% all restorations. The objectives this study were examine filler level effect on nanocomposite containing nanoparticles amorphous calcium phosphate (NACP) investigate load‐bearing acid‐neutralizing properties inhibition. NACP with 116‐nm particle size synthesized via spray‐drying technique...
Abstract One of the most important concerns with clinical use plasma‐sprayed hydroxyapatite (HA) coatings is resorption coating, and dissolution at neutral pH one two major mechanisms. In this study, highly crystalline pure HA powders were atmospherically plasma sprayed using various parameters. Dissolution both was measured a calcium ion meter. Surface characteristics, including phase, morphology, roughness, compared for before after dissolution. Pulverized exhibited significantly higher...
This study aimed at preparing and studying the properties of nanoparticles calcium phosphate (nCaP) with Ca/P ratios ranging from 1.0 to 1.67 using a spray-drying technique. Micro-structural analyses suggested that nCaPs 1.33 were nano-sized amorphous (ACP) containing varying amounts acid carbonate. The nCaP ratio 1 contained only low crystalline dicalcium (DCP). BET measurements showed specific surface areas (12 ± 2 50 1) m(2)/g, corresponding estimated equivalent spherical diameters (38...
Abstract Calcium phosphate cement (CPC) sets in situ and forms apatite with excellent osteoconductivity bone‐replacement capability. The objectives of this study were to formulate an injectable tetracalcium phosphate‐dicalcium (CPC D ), investigate the powder/liquid ratio needle‐size effects. injection force (mean ± SD; n = 4) extrude paste increased from (8 2) N using a 10‐gauge needle (144 17) 21‐gauge ( p < 0.05). With needle, mass percentage extruded was (95 4)% at 3; it decreased (70...
We have designed a 2-spinnerette device that can directly electrospin nanofiber scaffolds containing gradient in composition be used to engineer interfacial tissues such as ligament and tendon. Two types of nanofibers are simultaneously electrospun an overlapping pattern create nonwoven mat gradient. The approach is advance over previous methods due its versatility – gradients formed from any materials electrospun. A dye was characterize the applicability tissue engineering demonstrated by...
Abstract Clinical data indicate that secondary caries and restoration fracture are the most common problems facing tooth restorations. Our ultimate goal was to develop mechanically‐strong caries‐inhibiting dental composites. The specific of this pilot study understand relationships between composite properties ratio reinforcement filler/releasing filler. Nanoparticles monocalcium phosphate monohydrate (MCPM) were synthesized incorporated into a resin for first time. Silicon carbide whiskers...
Calcium phosphate cement (CPC) can self-harden in vivo to form hydroxyapatite (HA) with excellent osteoconductivity. In recent studies, CPC-chitosan composites are developed high mechanical strength and washout resistance. The objectives of the present study optimize setting time properties a composite by tailoring chitosan content, evaluate bioresorbability using an vitro dissolution model. Six mass fractions tested: 0, 10, 15, 20, 25, 30%. Specimens immersed solutions pH ranging from 3.5 5...
Abstract The complex biological and mechanical requirements for implant materials in the human body generally cannot be furnished by one single material. In present study, hydroxyapatite/polymer composite coatings with different contents of hydroxyapatite were produced using a flame spray system. This processing route is intended to obtain coating an optimal combination properties these two skeletal implants. from blend ethylene methacrylic acid copolymer powders, which delivered fluidized...
This letter reports the successful development of an S-band short-length, high-efficiency, coaxial cavity multi-beam relativistic klystron amplifier (CCMB-RKA). The simulation in one-dimensional genetic algorithm, capable giving high-efficiency parameters, predicted 67% efficiency CCMB-RKA, taking interaction length as 600 mm, beam voltage 420 kV, and current 230 A. However, for accurate results, CCMB-RKA was simulated again using three-dimensional code CHIPIC, RF input power, voltage, 4.4...
To significantly improve the electronic efficiency of coaxial multi-beam relativistic klystron amplifier (CMB-RKA), physical process beam-wave interaction and parameters that affect was studied. First, high discussed by simulating versus (frequency cavity, drift tube length between cavities, external quality factor output cavity), in one-dimensional (1-D) large-signal simulation software. Moreover, further analyzed through current modulation number particles at entrance three-dimensional...
In this letter, the stability of an X band gigawatt coaxial multi-beam relativistic klystron amplifier (CMB-RKA) operating in repetitively pulsed mode was investigated by particle-in-cell (PIC) simulation and experiments. A four-gap extended-interaction output cavity optimized to avoid electrons reflection. And a water-cooled electron beams collector which integrated with converter designed reduce plasma secondary electrons. The explosive emission conditions were improved using C–C composite...