Experiment Station Record, Volume 74, January-June, 1936 Page: 43
xx, 1029 p. ; 24 cm.View a full description of this book.
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19361] HORTICULTURE 43
was 59 hr. after 24 hours' storage and the minimum only 8 hr. after 7 days.
With small quantities of fruit the rate of cooling in an ice refrigerator equipped
with a fan was much more rapid than without a fan. The construction and
operation of an ice-cooled refrigerator adapted to home use is discussed.
The absorption by grapes of iodine from iodized wraps, R. G. TOMCKINS
([Gt. Brit.] Dept. Sci. and Indus. Res., Food Invest. Bd. Rpt., 1934, pp. 156158).-Preliminary
observations showed that iodine is absorbed much more rapidly
by stalks than by berries and that exposure to the air for periods up to
10 days did not result in an appreciable loss of the absorbed iodine.
The effects of ozone on bananas, R. GANE ([Gt. Brit.] Dept. Sci. and Indus.
Res., Food Invest. Bd. Rpt., 1934, pp. 12'8-130, fig. 1).-Measurements of the rate
of production of carbon dioxide by green bananas at 15 C. were made il
atmospheres containing different concentrations of ozone. With 40 p. p. m.
the rate of carbon dioxide evolution was higher than in fruits ventilated with
fresh air. whereas in air containing from 25 to 30 p. p. m. the rate was
only slightly higher than in air. With from 5 to 7 and 1.5 p. p. m. of ozone
there. was no significant change in the rate of respiration or of ripening.
The acidity and sugar-content of bananas during ripening, R. GANE ([Gt.
Brit.] Dept. Sci. and Indus. Res., Food Invest. Bd. Rpt., 1934, pp. 132, 133,
fig. 1).-Observations with a glass electrode on bananas taken from the same
cluster and stored at 15 C. showed very rapid changes in acidity of the pulp
during ripening, from pH 5.26 to 5.5 in green to a maximum of pH 4.34. At
0 there was a slight rise in pH in 16 days, with no change in the rate of
evolution of carbon dioxide and with a blackening of the fruits. Tabulated
data on changes in sugars accompanying ripening showed a great increment
in sucrose and total sugars in the final stages of maturity.
Combustible gaseous products of fruits, R. GANE ([Gt. Brit.] Dept. Sci.
and Indus. Res., Food Invest. Bd. Rpt., 1934, pp. 124-128. figs. 2).-Measurements
of the total amount of combustible gaseous substance produced by ventilated
ripe oranges held at 15 C. (59 F.) showed a constant output as long
as the fruits were sound, after which the output of combustible gases and of
carbon dioxide greatly increased. In another test, doubling the rate of ventilation
after 8 days approximately doubled the output of combustible matter,
and the removal of the outer layers of the peel greatly increased the production
of combustible material and of carbon dioxide. In experiments with bananas
ripening at 15 there was noted a large and rapid increase in the output of
combustible substances in the later stages of maturity. The injury of green
bananas did not stimulate their rate of ripening. The ozone and iodine pentoxide
methods of estimating unsaturated gaseous products are discussed.
Hybridization of coffee, C. A. KRUG (Jour. Heredity, 26 (1935), No. 8, pp.
325-330. figs. 6).-In connection with a description of the coffee flower and its
habits of bloom, the author discusses methods of technic employed by the
Agronomical Institute of Sio Paulo, Brazil, in the emasculation and hybridization
of coffee.
Orchard heaters, L. L. ENGLISH (Alabama Sta. R.pt. 1934, p. 26).-A brief
report is given of trials of heaters and fuels in the Mobile County satsuma
orange area.
The construction and operation of the mound orchard heater, L. L. ENGLISH
(Alabama Sta. Spec. Circ., Nov. 1934, pp. 11, figs. 7).-This heater, constructed
of soil and using coke as a fuel, was found satisfactory in the satsuma
orchards of southern Alabama.
Effect of different temperatures, humidities, and free ammonia on
pecans in storage, O. C. MEDLOCK (Natl. Pecan Assoc. Proc., 32 (1933), pp.
21-28; aibs. in Alabama Sta. Rpt. 1934, p. 7).-Four years' storage studies with
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United States. Office of Experiment Stations. Experiment Station Record, Volume 74, January-June, 1936, book, 1937; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc5082/m1/63/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.