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Exposures to pulsed electric fields and non-thermal plasmas have both been investigated as methods for the inactivation of microorganisms. In our studies we have combined treatments with an argon-operated, rf-driven plasma jet (kINPen 09) with the application of pulsed electric fields of microsecond duration. Inactivation efficacy against Gram-positive Staphylococcus aureus and Gram-negative Pseudomonas...
Recently, the study of plasma activated water (PAW) disinfection has attracted increasing researchers' attention. However, many questions of PAW disinfection still remain unanswered, especially for the mechanism of bacterial cell damage caused by PAW. More in-depth studies of the PAW disinfection are expected.
Dental caries and periodontal disease are common oral diseases worldwide, and 60–90% of school children and nearly 100% of adults have dental cavities. The world health organization has put the incidence of periodontal disease as the tumor, cardiovascular morbidity after the third. Actually, those two diseases are caused by bacteria (facultative anaerobes and obligate anaerobes). Chemical drug (such...
The inflammation of tooth pulp or periapical tissue is the most common diseases in the dental emergency. Many studies have demonstrated that persistent endodontic infections are frequently caused by Enterococcus Faecalis (E. faecalis). When grown to biofilm, they become 1000-fold more resistant to phagocytosis, antibodies, or antimicrobials than planktonic bacteria. Eliminate and inactivate the bacteria...
A laboratory-scale reactor for the activated sludge process was fed with simulating municipal living wastewater. In the course of operation, the urease and catalase activities and their correlations with the process parameters and microorganisms were studied. The results showed that during the sludge acclimation process, the activities of two enzymes were closely related to the microorganisms and...
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...
A direct-current cold atmospheric-pressure air plasma microjet (PMJ) based on the microhollow cathode discharge design is used to inactivate six types of bacteria within a small well-defined area on a large Petri dish. We show that the PMJ is very effective in inactivating bacteria in their vegetative state as well as in the spore state within the area of plasma exposure. We also observed that bacteria...
Cytochrome P450 2C9 (CYP2C9) is among most important members of the cytochrome P450 enzyme superfamily, which metabolizes many important exogenous and endogenous compounds in many species of microorganisms, plants and animals. CYP2C9 is related to the oxidative of 16% of all therapeutics in clinical use and has adverse drug effects, for example, enzyme induction and inhibition. In order to understand...
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