LOO 
1961. Storing Apples in Controlled Atmosphere. Wash. State Univ., Agr. 
Ext. Ser. EM 2079, is pps 
101. Van Hiele, T. 
1951, Gas Storage of Fruit in the Netherlands, 8th Int. Cong. Refrig. 
PLEOC. 5 PP o 410-415. 
102, Vickery, J. Ro, -Huelin, Fo E., Hall, Eo €..:and Tindale, Go 5. 
1951, The Gas Storage of Apples and Pears in Australia. 8th Internatl, 
Cong. Refrig. PLOC oy, PPpo 416-420, 
LO3\5 West, Gi. 
1951. The History of Refrigerated Gas Storage for Horticultural Produce, 
8th Internatl, Cong. Refrig. Proc., pp. 406-409. 
104. Zahradnik, J. W., Southwick, F. W., and Fore, J..M. 
1958. Internal Atmosphere Movement in CA Apple Storage. Agr. Engin. 
39 3288-289. 
105. and Southwick, F. W. 
1958. Design Details and Performance Characteristics of a Douglas Fir 
Plywood CA Apple Storage. Mass. Agr. Expt. Sta. Bul. 505. 
VOLATILES AND ATMOSPHERE PURIFICATION IN STORAGE a 
Many studies have been made on the effects of volatiles in apple stor- 
ages. Much of the research and thought on the role of ethylene and nonethylenic 
volatiles produced by fruit is reported in the reviews of Biale (3), Burg (10), 
Pentzer and Heinze (57), Porritt (62), Ulrich (83), and Varner (88) as well as 
in a number of publications concerned with volatiles and air purification 
The results of air purification investigations on apple quality have not 
been in agreement. According to some reports, the removal of storage volatiles 
may extend the storage life, decrease the rate of softening, or improve the 
flavor or appearance of the fruit. (61, 69, 20, 22, 78, 85, 86, 87). Others, 
however, have not observed such benefits to accrue as a result of air purifica- 
tion (17, 21, 23, 24, 89). It was later suggested that air purification could 
be beneficial only if the fruit were in the preclimacteric stage of development 
(47, 74). 
Though volatiles given off by postclimacteric apples have been credited 
with stimulating respiration and ripening, investigations at temperatures near 
those normally used for apple cold storage have shown ethylene or the vapors 
from ripe apples to have little or no stimulatory action on respiration or 
ripening (19, 20, 26, 30, 56, 75). 
Volatiles have been implicated in the development of scald in a number 
of reports (31, 47, 68, 69, 70, 73, 78) but they have been found to have played 
little or no role in its development in a series of other investigations (1/7, 
23, 24, 39, 49, 55, 56, 89). Smock (74) concluded in 1955 that "Seald control 
with any air purification agent is inadequate." The relationship of ethylene 
1/ Underscored numbers in parentheses refer to Literature Cited, p. 104. 
102 
