Extraction of chlorophyll from leaf material with dimethyl sulphoxide allowed measurement
of the attenuation of photon detection from a sealed miniature 14 C standard to be used for …

Determination of 14C in solid residues and intact tissues has traditionally involved
combustion of samples to 14C02 (Fuchs and de Vries, 1972). However, recent meth allow …

A simple portable instrument utilizing a cadmium sulphide light-dependent resistor in a
bridge circuit, and its use in the in vivo estimation of total chlorophyll content of tobacco …

An instrument for measuring total chlorophyll in tobacco leaves is described and its
calibration is discussed. The optical density of the leaf is measured at 680 and 720 nm, the …

A dual wavelength chlorophyll meter (Minolta SPAD-502) was used to measure chlorophyll
content in leaves of a number of Vitis species grown in pots containing calcareous or non …

A fast, economical, and reproducible method for the preparation of green plant samples for
14 C quantitation by liquid scintillation spectrometry is presented. Uniform weights of green …

Compared with sample preparation techniques which involve wet or dry combustion
(reviewed by Fuchs and de Vries, 1972), measurement of radioactivity in plant material by …

The determination of photosynthetic activity by measurement of 14 C-labelled CO 2 fixation
in the light is usually carried out by scintillation counting after digestion and bleaching of the …

The relationship between the chlorophyll content of wheat flag leaves estimated by a
chemical method in the laboratory and that obtained using a Minolta chlorophyll meter was …

A recent non‐destructive technique allows estimation of leaf chlorophyll content using the
portable SPAD‐502 chlorophyll meter. Measurements were taken on four species (winter …