A PORTABLE LEAF AREA MEASURING INSTRUMENT
نویسندگان
چکیده
منابع مشابه
A portable instrument for measuring macular pigment with central fixation.
PURPOSE To evaluate the reliability and validity of a portable instrument for measuring macular pigment optical density. METHODS The instrument is small, uses light emitting diodes as light sources and the principles of heterochromatic flicker photometry of comparing foveal and extra-foveal minimum flicker matches. It uses central fixation for the extra-foveal matches, which subjects found ea...
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ژورنال
عنوان ژورنال: Canadian Journal of Plant Science
سال: 1964
ISSN: 0008-4220,1918-1833
DOI: 10.4141/cjps64-077