| 41. | The phytochrome pigment was identified using a spectrophotometer in 1959 by biophysicist Warren Butler and biochemist Harold Siegelman.
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| 42. | Not easy, but that's why we invented instruments, such as pH meters and spectrophotometers.
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| 43. | The science faculty boasts a Video Microscope, an Atomic Absorption, IR and 4 UV Visible Spectrophotometers.
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| 44. | Experimental variations such as the slit width ( effective bandwidth ) of the spectrophotometer will also alter the spectrum.
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| 45. | This can be observed with a standard UV / vis spectrophotometer, using a 10 cm path-length.
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| 46. | Friedkin recalls that an early model of the Beckman DU spectrophotometer was used by the penicillin researchers in Peoria.
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| 47. | Sherlock Holmes didn't know about DNA . He'd have gazed in bafflement at an infrared spectrophotometer.
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| 48. | For reflectance measurements, the spectrophotometer quantitatively compares the fraction of light that reflects from the reference and test samples.
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| 49. | In the UV, visible and near IR, absorbance and reflectance spectrophotometers usually illuminate the sample with monochromatic light.
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| 50. | As DCPIP is reduced and becomes colorless, the resultant increase in light transmittance can be measured using a spectrophotometer.
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