Ultraviolet disinfection is an important method for controlling the large-scale outbreaks of diseases in aquaculture. As a novel and promising light source, ultraviolet light-emitting diode (UV-LED) has advantages safety, high efficiency no environmental pollution risks. However, it remains unclear whether UV-LEDs can replace traditional UV sources aquaculture water treatment processes. Present...

This work analyses how to optimise efficiency in the use of solar light for different UV-based photochemical water treatment processes. The direct sunlight state-of-the-art compound parabolic collector (CPC) photoreactors is compared with energy electricity generation photovoltaic (PV) power systems feed LED lighting sources. Seven processes (CPC, PV-UVA LED, PV-UVC CPC+TiO2, CPC+H2O2, LED+TiO2...

In this study, the near-ultraviolet (near-UV) light-driven TiO2 photocatalytic chlorine activation process, termed as UV365/TiO2/chlorine degrades a representative recalcitrant micropollutant, carbamazepine (CBZ), at an apparent first-order rate constant (kCBZ?) that is 34.2 and 3.9 times higher than those without chlorine, respectively. serves more important role catalyst to enhance yield of h...

Biofouling is problematic for the shipping industry and can lead to functional financial setbacks. One possible means of biofouling prevention use ultraviolet-C (UVC) light. Previous studies have investigated UVC with marine coatings, but synergistic effect color surface material, specifically reflectance, has yet be determined. This study comprised three parts: (red vs. white), reflectance (st...

Parkinson’s disease (PD) is caused by degeneration of the dopaminergic neurons; environmental toxicants are hypothesized to play a role in PD etiology. Environmental toxicants can cause mitochondrial dysfunction through mitochondrial DNA (mtDNA) damage and production of reactive oxygen species. Serial ultraviolet C (UVC) radiation causes an accumulation of mtDNA damage and 6-hydroxydopamine (6-...

UV light and photocatalysts such as titanium dioxide (TiO(2)) and silver (Ag) are useful for disinfection of water and surfaces. However, the effect of UV wavelength on photocatalytic disinfection of spores is not well understood. Inactivation of Bacillus spores has been examined using different UV wavelengths and TiO(2) or TiO(2)/Ag composite materials. The level of UVA disinfection of Bacillu...

Electrospun polyelectrolyte hydrogel nanofibres are being developed for many applications including artificial muscles, scaffolds for tissue engineering, wound dressings and controlled drug release. For electrospun polyelectrolytes, a post-spinning crosslinking process is necessary for producing a hydrogel. Typically, radiation or thermal crosslinking routines are employed that require multifun...

BACKGROUND In the last few decades the quality of natural water has often deteriorated as a variety of novel pollutants have contaminated rivers and lakes. Trace amounts of some man-made chemicals can be hazardous to plants, animals as well as human health as carcinogens, mutagens or endocrine disruptors. Light radiation may help in its decomposition, aided by naturally occurring colored organi...

OBJECTIVE To examine the effects of aspirin on the potential for oxidative modification of low density lipoprotein (LDL). DESIGN Before and after trial. SETTING University department of medicine within a district general hospital campus. PATIENTS Ten healthy normolipidaemic volunteers drawn from laboratory and medical staff. INTERVENTIONS Aspirin (enteric coated) 300 mg daily for two we...

background : one way to optimize energy consumption is replacing incandescent lamp with compact fluorescent lamps .these lamps produce ultraviolet radiation due to the nature of light production. this study aimed to evaluate the ultraviolet radiation emitted from compact fluorescent lamps which are widely used in iran. methods : this study carries out on 16 compact fluorescent lamps (four diffe...