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 …

Four methods for the preparation of 14 C-labelled plant tissues for liquid scintillation
counting have been compared for accuracy and precision. The wet oxidation method of …

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, efficient, and inexpensive method for measuring radioactivity as well as
chlorophylls a and b in a large number of plant tissue samples is presented. Chlorophyll is …

A method is described for the liquid scintillation counting of 14C in plant tissues. Samples
are fixed, in the scintillation vial, in a solution of ethanol and acetic acid (3: 1) and …

A portable field apparatus for the measurement of photosynthesis is described. Short pulses
(20 s) of air containing 14CO2 are applied to circular leaf areas of 1 cm2, enclosed in a …

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 …

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 …

A simple apparatus and a rapid and sensitive isotope method for determination of
photosynthetic CO 2 fixation of seedlings, whole leaves or leaf segments is described. The …

Benzoyl peroxide in toluene was used to bleach chlorophylls in alcohol extracts from plants
fed with 14CO2 for improved direct measurement by liquid seintillation counting. The 0.5 …