This investigation was undertaken to determine, from a dietetic
standpoint, the amounts and proportions of dextrose, levulose and
sucrose present in Bosc pears, and to furnish information that might
be of value in the development of by-products from the off-grade
fruit of this variety.
The attempt was made to carry...
Experiments were performed to determine whether a direct
correlation exists between the growth rates of tall and dwarf peas
grown either in the light or in the dark and endogenous gibberellin
(GA) content. Three separate but related experimental approaches
were utilized: (1) the determination of possible qualitative and /or
quantitative...
Shoot apex senescence is defined as the collective progressive
and deteriorative processes which ultimately terminate the functional
life of the shoot apex. Senescence of shoot apices of Pisum sativum
L. 'Alaska' as measured by cessation of stem elongation was delayed
by removal of flowers and by treatment with gibberellin A₃...
The acyclic monoterpene geraniol was biosynthesized from
¹⁴CO₂ in Pelargonium graveolens (rose geranium) and isolated from
the hexane-extractable fraction in five experiments. Experiments 1
and 2 were preliminary experiments in which the total incorporation
of label into geranium oil was determined. In experiments 3 and 4a and
4b both incorporation...
The amounts of residual dichlobenil (2,6-dichlorobenzonitrile)
in water and hydrosoil were compared periodically following application
of the wettable powder and granular formulations of the
herbicide to separate ponds at ten pounds of active ingredient per
surface acre {0.6 ppmw (parts per million by weight) }. Dichlobenil
was measured by electroncapture...
Procedures were developed for assaying the biosynthesis of (-)-
kaurene-¹⁴C and other intermediates in gibberellin (GA) synthesis
from mevalonic acid-¹⁴C in cell-free enzyme extracts of immature
pea (Pisum sativum L. cv. Alaska) seeds. This system was utilized
to investigate three aspects of GA biosynthesis: (1) apparent capacities
for (-)-kaurene biosynthesis...
A transaminase (aminotransferase, EC 2. 6. 1) was extracted and
purified approximately 148-fold from shoot tips of pea (Pisum sativum
L. cv. Alaska) seedlings and some properties of the enzyme were
determined. The purification included acetone precipitation followed
by column chromatography on hydroxylapatite.
With a-ketoglutarate as co-substrate, the acetone precipitated...
Previous investigations have shown that the enzymes
catalyzing the biosynthesis of the gibberellin-type of hormones
from mevalonic acid in plants are compartmentalized
in plastids. Moreover, the activity of one of the key
enzymes in the biosynthetic sequence, kaurene synthetase,
exhibits markedly enhanced activity when a dark-grown pea
seedling undergoes de-etiolation...
Micropaleontological data have been analyzed through mathematical
and statistical procedures, in order to: (1) establish the distribution
pattern of radiolarian assemblages in the surface sediments,
(2) establish the relationship of these assemblages with oceanographic
variables, (3) determine the faunal composition down-core with
respect to the faunal surface pattern, and (4)...