TDHCA's homeownership programs are designed for first time homebuyers or homebuyers who have not owned a home as their primary residence within the past three years. Potential homebuyers must also meet program income guidelines and program purchase price limits. Additional credit and underwriting guidelines may apply.
Most ultraviolet purification systems are combined with various forms of filtration, as UV light is only capable of killing microorganisms such as bacteria, viruses, molds, algae, yeast, and oocysts like cryptosporidium and giardia.ltraviolet Water Purification-UV. Ultraviolet water purification lamps produce UV-C or germicidal UV, radiation of much greater intensity than sunlight. Almost all of a UV lamp's output is concentrated in the 254 nanometers (nm) region in order to take full advantage of the germicidal properties of this wavelength.
the addition of sheets of metal to a beam of x-rays for the purpose of altering the energy spectrum and thus the imaging characteristics and penetrating ability of the radiation. Filtration is generally accomplished with aluminum or copper at low to medium energy and with tin, copper, or aluminum at higher energy.