In this study, nanofibers with different ratios of poly(vinyl alcohol) and chitosan incorporated moxifloxacin hydrochloride (MH/PVA/CS) were fabricated through the blending electrospinning, morphological features tested using scanning electron microscopy (SEM). Further characterization new nanofiber was accomplished by Thermogravimetric analysis (TG), X-ray diffraction (XRD) Fourier-transform infrared spectroscopy (FTIR). Antibacterial activity MH-loaded at drug loading compared blank group....

Terahertz (THz) communication has always been considered as a potential solution for "communication blackout" during aircraft reentry. In this article, the propagation characteristics of THz wave in realistic plasma sheath whole reentry process are studied by solving fluid model and transmission model. As result, electron number density collision frequency decrease with increase height antenna position. And attenuation decreases electromagnetic (EM) frequency, height, Finally, two schemes to...

High-density plasma source device is of great significance for ground experiment verification vehicle reentry communication. atmospheric-pressure jet (APPJ), as a high-density source, has received little attention in experiments on communications. In this article, terahertz (THz) wave propagation characteristics APPJ are investigated by joint simulation discharge and THz transport model related experimental measurements. interferometer (THz-IF) system used to diagnose the electron density...

Research on terahertz communication under different vehicles has important guiding significance for the design of future hypersonic vehicle and Radio Frequency(RF) blackout. In this paper, a joint simulation model plasma flow thermochemical nonequilibrium state transmission is developed to investigate differences in wave characteristics shapes related mechanisms. By comparing sheath among HIFIRE-5b(Hypersonic International Flight Experimentation-5b), RAM C(Radio Attenuation Measurement C)...

Abstract Terahertz communication is considered as a potential solution to radio frequency (RF) blackout caused by plasma sheath. Previous studies have mainly focused on the external parameters such vehicle shape and flight speed terahertz communication, while neglecting influence of spatiotemporal variations during evolution process angle attack (AOA). In this work, effect flow AOA wave transmission characteristics are studied. Electron density collision distributions exhibit significant...

A self-consistent calculation model of hypersonic fluid and electromagnetic wave (EM) propagation around a vehicle was used for radio frequency (RF) blackout prediction. First, the plasma flow RAMC-II at an altitude 61 km calculated using finite-volume method with newly developed unstructured grid solver. The electron number density shows good agreement flight test data NASA data. Then, effect chemical reaction ionization rate on is studied, which that decreases decrease in rate. Finally,...

Plasma sheath prediction of hypersonic vehicle is critical to radio frequency (RF) blackout solutions as well design and development. In this paper, an optimized chemical reaction (OCR) model by considering the difference in rate coefficient under different re-entry heights proposed obtain more accurate plasma distribution. OCR model, correction at obtained deriving relationship between surface temperature rate. Further, through coupling with flow co-simulation terahertz transmission...

Nanofibers prepared by biobased materials are widely used in the field of biomedicine, owing to outstanding biocompatibility, biodegradable characters, and excellent mechanical behavior. Herein, we fabricated multilayered nanofibrous scaffolds order improve performance drug delivery. The composite layer-by-layer were incorporated hydrophobic poly(l-lactic acid) (PLA): polycaprolactone (PCL) hydrophilic poly(vinyl alcohol) (PVA) nanofibers via multilayer electrospinning. Morphological...

Terahertz communication is considered as a potential solution to alleviate the blackout. However, it not clear how shape parameters of vehicle affect propagation terahertz communications in plasma sheath. In this article, influence half-angle on flow and characteristics around blunt cone was investigated using numerical hypersonic hydrodynamic model multilayer transmission model. The maximum electron number density sheath near antenna decreases with decreasing half-angle. thickness...

Rheumatoid arthritis (RA) is an autoimmune disease of the joints characterised by synovial hyperplasia and chronic inflammation. fibroblast-like synoviocytes (RA-FLS) cells are dominant cell type in hyperplastic membrane, which play a key role pathogenesis RA. They can invade cartilage, cause inflammation, destroy joints, show tumour-like anti-apoptosis characteristics. Thus, purpose this study to investigate effect cold air plasma (CAP) on RA-FLS cells. The results showed that CAP treatment...

In recent years, the interaction of electromagnetic waves (EM) with plasma sources under argon and helium discharges has been extensively studied due to its potential applications in stealth. However, nitrogen, as a more economical discharge gas, ignored terms absorption EM stealth effect. this work, numerical calculation model combining two-dimensional capacitively coupled (CCP) fluid wave was developed investigate uniformity degree broadband microwave effects nitrogen CCP. It is concluded...

Abstract A self‐consistent calculation model combining flow field and electromagnetic wave propagation is presented. The hypersonic around the RAMC‐II vehicle at different reentry heights numerically solved using a computational fluid dynamics technique with two‐dimensional model, then perform calculations in conjunction models. dependence of frequency, polarization mode, incident angle, plasma collision frequency on Electromagnetic characteristics have been investigated experimentally shock...

Abstract A high temperature point focusing lens antenna was proposed in this article. The mainly includes three parts: a lens, feed source, and support frame. is made of high‐temperature resistant quartz material, the structure are also metal. In addition, dielectric constant ε r = 3.78, which higher than that conventional Teflon material (with =2.1). Under same diameter, thickness only 50.5% weight 51.5% material. To verify design, processed measured. According to test results, focal...

In recent years, Atmospheric pressure plasma jet (APPJ) have been widely used in biomedicine and material modification. APPJ exhibits different discharge characteristics when processing various materials or biological tissues, which has a certain influence on the effect. However, of processed properties ignored. This work developed fluid model to study (material thickness relative permittivity) needle-plane APPJ, related mechanism was discussed. High electric field electron energy appear...

The purpose of this article is to study the influence different powers, pressures, frequencies, and gases on electron density distribution in special structures. A simulation model established, electronic a capacitance coupled plasma (CCP) device calculated over power range 0-10 kW, pressure 0-50 Pa, frequency 13.56-300 MHz. results show that logarithmic function helium argon plasmas, peak value for occurs diffusion region. At certain power, collisions between particles increase with...

A 2D drift diffusion fluid model was employed to study the plasma uniformity of different capacitively coupled (CCP) in argon discharges based on COMSOL platform. The numerical results show that compared with traditional CCP device between plates, discharge by inner capacitors (CCP-ICD) has been significantly improved overall. Then, influence number and capacitor spacing CCP-ICD analyzed. can reach 89.5% radial direction under best parameters, but electron density is reduced an order...

Radix paeoniae alba (RPA) is a kind of herbal medicine traditional Chinese (TCM) that widely used for the treatment liver diseases and rheumatoid arthritis in clinical practice. As result low extraction efficiency RPA by conventional method, many patients are given high dosages. In this study, four exposure doses dielectric barrier discharge (DBD) plasma (0, 60, 120, 180 s) were applied to modify paeoniflorin, benzoylpaeoniflorin, tannic acid, gallic 2'-hydroxy-4'-methoxyacetophenone,...

Abstract The flow field around the RAMC‐II vehicle at differenrt angles of attack (AOA) was numerically solved using a computational fluid dynamics technique with three‐dimensional model. Electron density, pressure, temperature, and collision frequency, which is given great importance in this paper. maximal electron total temperature same position decreases angle on leeward side increases windward side. frequency almost unaffected by AOA side, but significantly Based realistic plasma sheaths...

A one-dimensional self-consistent calculation model of capacitively coupled plasma (CCP) discharge and electromagnetic wave propagation is developed to solve the characteristics transmission attenuation. Numerical simulation results show that peak electron number density argon about 12 times higher than helium, increases with augment pressure, radio frequency (RF) power, RF frequency. However, first then decreases as gap increases. The attenuation in 8.5-dB helium. At same time, power...