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Plasma aerodynamic excitation based on surface dielectric discharge is a effective approach for flow control, which can significantly improve the aerodynamic characteristics of the aircraft. However, the plasma excitation interaction region is limited and there are no significant effects by using typical two-electrodes sustained by nanosecond-pulse dielectric barrier discharge, therefore, it is difficult...
Because of the lack of crude oil resources all around the world, hydrogen resource has been developed for the feedstock instead of crude oil. As the cost-effective activation of methane, hydrogen production of the methane conversion has been extensively studied. In this paper, characteristics of the microsecond pulsed and nanosecond pulsed dielectric barrier discharge (DBD) 1 are experimentally investigated...
Combined with plasma enhanced chemical vapor deposition (PECVD), atmospheric pressure plasma jet (APPJ) can be used for depositing film on polymer surface due to its flexibility and high stability. In this paper, the APPJ is excited by a microsecond-pulse generator, and Hexamethyldisiloxane (HMDSO), working as the reaction precursor, is injected into the APPJ discharge region by the carrier gas (Ar)...
Nanosecond-pulse dielectric barrier discharge (DBD) can provide non-thermal plasmas with extremely high energy and high density for achieving complicated physical and chemical reactions in surface treatment of polymers. In this paper, the surfaces of low density polyethylene (LDPE) films are modified by atmospheric-pressure non-thermal plasmas generated by nanosecond-pulse DBD 1, 2. The DBD plasma...
The configuration and characterization of plasma jet are essential for their various applications. In this paper, two different configurations are used as high electrode: single tungsten electrode and tungsten electrode covered with quartz tubing (inner tubing). The high electrode is inserted into the middle of quartz tubing (outside tubing). The effect of inner quartz tubing on electrical property...
Electron spin resonance (ESR) spectrometry is the most direct and sensitive method for detecting certain reactive oxygen species (ROS)1. By ESR diagnosis, plasma-water reactions can be elucidated, which is meaningful for guiding its clinical application.
A direct current atmospheric pressure cold plasma jet was used to inactivate Staphylococcus aureus (S. aureus) suspended in a liquid. Three types of gases, pure argon (99.999%), argon with 2% oxygen, and argon with 2% oxygen and 10% nitrogen were used as operating gases respectively. The inactivation efficacies for the plasma jets operating in the three gases decrease from Ar/O2(2%) to Ar/O2(2%)/N2(10%)...
Summary form only given. Dermatophytes are the most common aetiological agents, which invade into keratinized tissues (skin, hair, nails) of humans and animals causing dermatophytosis (also known as ringworm or tinea). Swimming pools, fitness centers, barber shops, beauty parlors, saunas and steam baths are common places to pick up superficial fungal infections. Mycotic infections have become more...
Summary form only given. Formocresol and calcium hydroxide are commonly used as the clinical disinfectant of root canals. Although they have strong chemical disinfection properties, their cytotoxic effects have always been a concern. E. faecalis, which is responsible for root canal failure, can also cause life-threatening infections in humans, especially in the nosocomial (hospital) environment, where...
Summary form only given. Aqueous environments are susceptible to contamination by bacteria, protozoa and viruses, which are the root cause of various illnesses. These contaminations are usually treated by chemical methods. Recently, attempts have been made to inactivate bacteria in water with non-thermal plasmas using various approaches, e.g., a pulsed streamer discharge plasma or a gliding arc discharge...
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