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A germicidal lamp (also known as disinfection lamp or sterilizer lamp) is an electric light that produces ultraviolet C (UVC) light. This short-wave ultraviolet light disrupts DNA base pairing , causing formation of pyrimidine dimers , and leads to the inactivation of bacteria , viruses , and protozoans .
Lamp age or fouling or outages (reduction in UV intensity) Bulbs require periodic cleaning and replacement to ensure effectiveness. The lifetime of germicidal UV bulbs varies depending on design. Also, the material that the bulb is made of can absorb some of the germicidal rays. Lamp cooling under airflow can also lower UV output.
Germicidal lamps are simple low-pressure mercury vapor discharges in a fused quartz envelope. Gas-discharge lamps are a family of artificial light sources that generate light by sending an electric discharge through an ionized gas, a plasma. Typically, such lamps use a noble gas (argon, neon, krypton, and xenon) or a mixture of these gases.
Normally, the quartz envelope of standard low-pressure germicidal "G-series" fluorescent lamps is intentionally doped with materials to absorb mercury emissions below 254nm. This is to prevent ozone production in situations where ozone is not desired (in an EPROM eraser or mineral-hunting lamp, for example). The common G4T5 lamp is one of these.
The lamp's electrodes are typically made of coiled tungsten and are coated with a mixture of barium, strontium and calcium oxides to improve thermionic emission. A germicidal lamp uses a low-pressure mercury-vapor glow discharge identical to that in a fluorescent lamp, but the uncoated fused quartz envelope allows ultraviolet radiation to transmit.
Dezső Magyar: Gábor Bódy, Tamás Szentjóby, György Cserhalmi: Banned after release Fényes szelek: Miklós Jancsó: Hosszú futásodra mindig számíthatunk: Gyula Gazdag: Isten hozta, őrnagy úr: Zoltán Fábri: Zoltán Latinovits, Imre Sinkovits: Based on the novel by István Örkény, entered into the 7th Moscow International Film Festival
العربية; Aragonés; Azərbaycanca; تۆرکجه; বাংলা; Беларуская; Беларуская (тарашкевіца) Български
Hungarian cinema began in 1896, when the first screening of the films of the Lumière Brothers was held on the 10th of May in the cafe of the Royal Hotel of Budapest.In June of the same year, Arnold and Zsigmond Sziklai opened the first Hungarian movie theatre on 41 Andrássy Street named the Okonograph, where they screened Lumière films using French machinery.
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