Objective To study the effects of ultraviolet-A(UVA) irradiation on mice epidermal Langerhans cells(LC).

目的研究体外长波紫外线（UVA）对小鼠表皮朗格汉斯细胞（LC）生物学活性的影响。

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While the useful wavelengths are blocked by window glass, ultraviolet-A wavelengths associated with skin cancer easily pass through the glass.

虽然日光中有用的那部分波段被窗玻璃阻断了，但与皮肤癌相关的长波紫外线(uva)却很容易穿过玻璃。

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Fluorescent lights use electricity to excite mercury vapor. This produces ultraviolet light that causes a phosphor coating inside the bulb to glow.

荧光灯用电激发水银蒸气。这会生成紫外线光而使得镀在灯管内壁上的磷涂层发光.

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The system is equipped with an ultraviolet lamp and a halogen lamp that produces near-infrared light.

VOA: special.2011.06.07

But a product's SPF indicates only its ability to defend against sunburn-causing ultraviolet-B rays and not against ultraviolet-A, which penetrate deeper into the skin and cause premature aging. (Both types contribute to skin cancer.) For example, a person wearing SPF 50 could spend considerable time in the sun without getting burned.

WSJ: The Myths of Daily Sunscreen

His weapon: a rolling, 3-foot-tall machine (think R2-D2 from Star Wars) called the Xenex that bathes hospital rooms with intense, millisecond pulses of ultraviolet light from a high-wattage strobe light.

FORBES: How A New Machine Uses U.V. Rays To Blast Killer Bacteria

Galex - a space telescope designed to search for the ultraviolet light that newly born stars put out - hinted that NGC 6872 was made much larger in size by the collision.

BBC: Galaxy crash sparks biggest spiral