Methods: Blood concentration of theophylline was determined by double-wavelength ultraviolet spectrophotometry.

方法：采用双波长紫外分光光度法测定茶碱谷浓度。

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The ultraviolet ray emitting tube generates 253.7 micron wavelength ultraviolet ray to kill the bacteria, germ and mold in the air.

以极端紫外放射光线管产生253.7纳米波长的极端紫外放射光线，能消减空气中的细菌、病毒和霉菌。

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METHODS Adopt dual wavelength ultraviolet spectrometry to carry on the content measurement to above-mentioned two kinds of medicine.

方法采用双波长紫外分光光度法分别对上述两种药物进行含量测定。

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Now they have something that works like a flatbed document scanner, with a scanning head containing either six or 12 light-emitting diodes, each emitting light of a specific wavelength between 350 nanometres (ultraviolet) and 800 nanometres (infra-red).

ECONOMIST: Monitor

And when Dr Anderson injected the modified vesicles into mice and then shone ultraviolet light of a wavelength that can pass through flesh at some of them, he found the tactic worked.

ECONOMIST: Drug delivery

In 1998 chipmakers took up so-called deep ultraviolet light, which has a wavelength of 0.248 microns.

FORBES: Trick of the Light