| Creatinine concentrations in serum were assayed photometrically with standard test combinations. |
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| The p-nitrophenol released is proportional to the ALP activity and can be measured photometrically. |
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| Total tropinone reductase activity was measured photometrically by NADPH consumption with tropinone as substrate. |
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| Chlorophyll concentration was analysed photometrically at 652 nm after Arnon. |
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| Colour intensity is proportional to the amount of antigen. Evaluation of colour intensity is performed photometrically. |
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| The reagent forms a coloured complex with haemoglobin and its variants, which can be detected photometrically. |
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| Illuminance meters and luminance meters are calibrated photometrically on a custom basis using NRC luminous intensity standards. |
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| A discoloration occurs, which is recorded photometrically in the flow cell. |
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| Using the saliva calibrator, the internal standard is determined photometrically and the saliva content of the saliva sample is back calculated. |
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| The seasonal changes on Mars have been reliably observed, not only visually but also photometrically. |
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| The absorbency of the separated organic phase is measured photometrically at the wavelength of maximum absorption of 650 nm. |
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| The colour intensity is proportional to the level of specific antibody bound and can be quantified photometrically. |
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| For reference, the Institute of Transportation Engineers states that 3 samples are tested electrically and photometrically in all its standards of LEDs traffic lights. |
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| Verification is by detecting photometrically the difference between an empty well and a well containing serum or plasma at a wavelength at 450 ref. 620 nm. |
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| But the other two techniques will see increased application not only on Earth, but in space. COROT, a French satellite scheduled to be launched in 2006, is designed to discover planets photometrically. |
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| This recent nova, whose discovery is described by Guy Hurst on page 250 of this Journal, has been extensively observed by amateurs both photometrically and spectroscopically. |
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