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 longer wavelengths UV described below are NOT produced by germicidal UV lamps. They are part of the complete UV spectrum produced by the sun. UV-B - A small, but dangerous part of sunlight. Most solar UV-B is absorbed by the ozone layer.Prolonged exposure causes sun burn and could result in unhealthy effects on the skin and eyes.he longer wavelengths UV described below are NOT produced by germicidal UV lamps. They are part of the complete UV spectrum produced by the sun. UV-B - A small, but dangerous part of sunlight. Most solar UV-B is absorbed by the ozone layer.