BACKGROUND Organophosphorus pesticides are one of the most consumable poisons. Such poisons can enter water sources by different routes. Since consuming some drinking water containing an amount of poison higher than the standard level, causes undesirable effects on human health. This research aimed to study the effectiveness of eliminating malathion from water by ultraviolet irradiation (UV) me...

Ultraviolet germicidal irradiation (UVGI) is a disinfection method that uses ultraviolet (UV) light at sufficiently short wavelength to kill microorganisms. It is used in a variety of applications, such as food, air and water purification. UV has been a known mutagen at the cellular level for more than one-hundred years. The 1903 Nobel Prize for Medicine was awarded to Niels Finsen for his use ...

The purpose of ultraviolet (UV) disinfection is to bring end the growth and procreation microorganism. UV reactors are used for drinking water. Our goal current research work was properly locating positions lamps in a three-lamp close conduit water reactor. Three based on vertices four basic types triangles (Equilateral, Right angle, Scalene Isosceles). objective function optimized lamp positio...

The fate of ultraviolet-induced, thymine-containing dimers in the deoxyribonucleic acid (DNA) of Bacillus subtilis was investigated in both the wild type (UV(R)) and an ultraviolet light-sensitive (UV(S)) mutant. During incubation in the dark, dimers were excised from the DNA of the UV(R)B. subtilis, but remained in the DNA of the UV(S) mutant. About 40% of the excised dimers recovered in the w...

The laser induced fluorescence (LIF) spectra from plants give accurate information on the influences of ultraviolet A (UV-A) and ultraviolet B (UV-B) radiation on the growth of maize plants. In this paper, a thorough LIF study has been done on maize plants grown under controlled conditions. The maize (Zea mays) seeds were planted and exposed to UV-A and UV-B radiation from 0 to10 hours. The dec...

Memantine is a pharmaceutical used to treat memory loss, one of the main symptoms dementia and Alzheimer’s disease. The use memantine expected continue grow due increasing proportion elderly population worldwide. aim this work was conduct comprehensive study on behaviour in environment possibilities its removal from wastewater. Abiotic elimination processes (hydrolysis, photolysis sorption) wer...

Schoolchildren in their everyday school life are exposed to solar ultraviolet (UV) radiation. This may be through time spent outdoors whilst having meal breaks, physical education classes or other outdoor class orientated activities. This research, conducted at the University of Southern Queensland, investigates the UV exposure of schoolchildren and the effect real-time UV irradiances data and ...

Introduction: Protection against harmful effects of ultraviolet radiation (UV) is measured under Ultraviolet Protection Factor (UPF) scale. The utilization of protective clothing is the best way to deal with the damage caused by ultraviolet radiation. The purpose of this study was to compare the ultraviolet ray protective factor of pure cotton and cotton coated with ti...

Environmental Engineering Science, W. M. Keck Laboratories, California Institute of Technology, Pasadena, CA 91125 The design and testing of a solar-powered fiber-optic cable reactor prototype for the photocatalytic destruction of organic pollutants is presented. A concentrating collector directs sunlight into a fiber-optic cable which transmits light to a Ti02 photocatalyst immobilized on the ...

Fourteen lipase low-producing (Lip-) mutants of Yarrowia lipolytica were obtained by UV mutagenesis. Complementation studies showed that ten of these mutants belonged to one complementation group. Two other mutants, Lip-132 and 223, complemented those of the first group. Lip-1123 complemented mutants of the first and second groups. Lip-1351 did not complement Lip-742, 417, 529 and 1133, which b...