We can improve the quality of food storage in the refrigerator if we use a simple device. It will not be superfluous among a variety of household appliances.
Everyone is well aware that it will not work to keep high-quality food products in a non-freezing chamber for a long time. The meat has a greenish tint. And fruits and vegetables get moldy. And let’s not forget that it often happens that you need to keep heart without freezing, fresh, that is when it retains all the taste inherent in it.
By and large, this is not a problem. We can solve all these questions if you make a little modification to your standard refrigerator. We can give good advice for those who love tinkering: put a traditional germicidal lamp in the refrigerator.
It is best to install the lamp in the center of the refrigerator itself. Also, the right place is directly above the shelf where the vegetables are. There is no reason to install it in the freezer, where there are conditions for long-term storage.
How to install the lamp?
The lamp is usually installed on suction cups from children’s toys. If necessary, you can glue them with rubber glue.
Do not forget that the light from a germicidal lamp hurts human vision. This means that you need to connect the lamp to the circuit so that every time you open the refrigerator, the light turns off, and when you close it, it turns on.
Someone who cannot cope with such a matter can be done differently. They can glue the switch socket on the top of the refrigerator. And then, when you open the fridge, the lamp will need to be turned off manually to avoid the light’s adverse effects on the eyes.
The action of the germicidal lamp
Therefore, products are stored for a long time since the lamp has a detrimental effect on the microflora that is on them. In summer, when the temperature in the upper compartment of the refrigerator rises, the germicidal lamp’s impact on perishable food is especially noticeable. Storage times are increasing.
We must admit that the installation of a lamp leads to an increase in electrical energy consumption. However, this increase is negligible. And it is fully compensated by the more excellent safety of the products. The primary condition when using this lamp is to turn the food over regularly. This is necessary so that all foci of microflora are destroyed from all sides.
A similar “sterilizer” can be made from any box that closes tightly. It can also be a kitchen table. It is only necessary that he has a similar device inside. Of course, without the action of low temperatures, the shelf life of products is reduced. However, compared to storage under normal conditions, you can count on an increase several times.
What is UV Sterilization?
The properties of ultraviolet radiation depend on the wavelength, and the difference in the ultraviolet radiation of different sources is in the spectrum. Next, we have to talk about what are the sources of ultraviolet radiation and how we should use them to obtain the maximum bactericidal effect. At the same time, of course, it is necessary to minimize the risks of biological products that are undesirable.
The bactericidal effect comes from hard ultraviolet light – UVC, and to a lesser extent – from the ultraviolet light of medium hardness UVB. Only a narrow range of 230-300 nm has an apparent bactericidal effect. That is about a quarter of the content that is called ultraviolet light.
The effect of getting rid of pathogenic organisms is achieved with photolytic reactions; when the bond of organic molecules is disrupted, their activity is deactivated, DNA / RNA chains and cell membranes are destroyed. And as a result, cell division stops.
Nucleic acids absorb quanta with wavelengths in a given range. After that, the structure of DNA and RNA is destroyed.
If you increase the dose of ultraviolet radiation, then the number of microorganisms that survived on surfaces and the air will decrease exponentially. Say, to kill 90 percent of mycobacterium tuberculosis; you need 10 J / m2. Two such doses will kill 99 percent of mycobacteria. Three such amounts are already 99.9 percent.
The peculiarity of exponential dependence is that even a small dose can destroy most of the microorganisms.
Salmonella, among pathogenic microorganisms, is considered the most resistant to ultraviolet radiation. The dose that will kill 90 percent of its bacteria is 80 J / m2. The average amount that will kill 90 percent of coronaviruses is 67 J / m2. However, for most microorganisms, this dose is no more than 50 J / m2.
Gradually, the life of the UV lamp is depleted as the wavelength of the light flux changes. Irradiation of a worn-out lamp is no longer so destructive for pathogenic organisms. On average, lamps last approximately 8,000 hours effectively. No more. For the UV sterilizer to work effectively, the lights need to be changed every eight months. In extreme cases – once a year.
UV also has a detrimental effect on antibiotics and dyes since it destroys their structure, reduces their effectiveness.
Recommended models are UVClamp.bg
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