This study investigated the effects of ultraviolet-A (UV-A) and ultraviolet-C (UV-C) light on the mechanical properties in oyster mushrooms during the growth. Experiments were carried out with irradiation of the mushrooms with UV-A (365 nm) and UV-C (254 nm) light during growth. The exposure time ranged from 10 minutes to 60 minutes at intervals of 10 minutes and irradiation was done for three ...

BACKGROUND The treatment of onychomycosis is a challenge and infections are typically more severe and difficult to treat in toenails than in fingernails. OBJECTIVES The current study aimed to investigate the fungicidal effect of ultraviolet radiation on the growth of dermatophytes isolated from nails. PATIENTS AND METHODS Samples from patients with clinical manifestations of onychomycosis w...

This study investigated UV-C light inactivation of Escherichia coli O157:H7 and Listeria monocytogenes on the surface of organic apples, pears, strawberries, red raspberries and cantaloupes. Fruit surfaces spot inoculated with cocktail strains of E. coli O157:H7 and L. monocytogenes were exposed to UV-C doses up to 11.9 kJ/m(2) at 23 °C. Fruit surface roughness, contact angle, and surface energ...

The main objective of this study was to investigate the effectiveness ultraviolet light (UV-C) emitting diodes for decontamination stainless steel food contact surfaces. Listeria monocytogenes (ATCC 19115), Escherichia coli 25922), and Salmonella enterica serovar Typhimurium 700720) were chosen as challenge microorganisms. Target microorganisms subjected UV-C dosages 0, 2, 4, 6, 8 mJ cm −2 at a...

in this study, both the presence and concentration of some unsaturated compounds in hexane extracts of different parts of anthemis talyschensis showing absorption at wavelength 280-450 nm were surveyed, with the view of possibly using extracts of this plant in new formulations of sunscreen creams. the hexane extracts of flower, leaf and stem of a. talyschensis , collected from northwest iran, w...

Drinking water, like every other substance, contains small amounts of bacteria. Thus, chlorine is usually added to drinking water to prevent bacterial growth. Since minimal remnant amounts of chlorine are found in drinking water, new sterilization alternatives were developed over time. Due to its germicidal effectiveness, UV-C light became an alternative to chemicals. Nowadays, UV-C light is of...

UV-B Stress, Pigment and Protein Content, Pure Cultures o f Marine D iatom s Several species o f marine diatoms were grown at + 18 °C and + 2 2 °C under normal air condi­ tions (0.035 vol.% C 0 2) at a light/dark alteration o f 14: 8 h. Intensity o f white light was 1 mW (~ 5000 lux). An artifical nutrient solution o f 35%o salinity was used. Algae harvested during exponential growth — were exp...

Objective: Orthodontists use orthodontic pliers continuously, and these tools have a strong potential for nosocomial infections. This study aimed to compare the efficiency of three methods disinfecting pliers. Material Methods: The active tips 26 (distal end cutters Weingart pliers) were contaminated with S. aureus, E. coli, C. albicans microorganisms, viruses, spores. microbial control 70% alc...