How it works
Irradiation Spectra of Various Plasmas
The main operating principle of the Yanex units is very simple: The air and open surfaces are exposed to pulsed high-intensity light of continuous spectrum
with the frequency of 2 to 5 flashes per second. Famously the ultraviolet irradiation can be divided into three spectra: UV-A, UV-B and UV-C. The former two types are common for us while UV-C does not penetrate the Earth atmosphere, which means the microorganisms have no protection against it.
The ultraviolet light of this wavelength penetrates the cell walls of bacteria, viruses and other microorganisms directly destructing their DNA and inactivating them.
The irradiation in the 230-300 nm range causes primarily dimerization of nucleic acids (mostly thymine dimers are formed).
The ultraviolet light with a wavelength shorter than 230 nm causes a number of destructive processes, namely:
- lipids photooxidation leads to depression of membrane barrier functions;
- photohydration of the DNA pyrimidine bases, formation of intermolecular cross-links (DNA - DNA, DNA - protein, protein - protein), single- or even double-strand breaks of DNA ensure the irreversible microorganisms inactivation;
- destruction of amino-acid residues in enzymes, protein photoinactivation and photodegradation of various coenzymes drop the activity of repair processes in the cell.
The source of ultraviolet light in Yanex units is a xenon lamp. A powerful electric discharge in the gas (xenon) inside a quartz bulb generates plasma emitting a light flash spectrally very similar to the Sun. Further still, the xenon plasma brightness (7500 - 9500°K) is higher than the Sun’s (5600°K).
The disinfection efficacy depends on the germicidal dose calculated by the unit automatically with regard to the following:
- size of the treated room;
- required germicidal efficiency.
The operator using a control panel inputs these parameters, after that the unit starts the disinfection cycle. A built-in bactericidal flow indicator constantly analyzes the lamp operation and turns off the unit upon reaching the required germicidal dose. This practice significantly increases the quality and reliability of decontamination. UV-irradiation has been used for disinfection purposes for quite a long time already.