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Effect of drying and storing tung seeds on quality of the oil and milling characteristics of the seeds
Author(s) -
Holmes Raiford L.,
Pack Frank C.,
Gilbert S. G.
Publication year - 1947
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02641953
Subject(s) - moisture , water content , horticulture , environmental science , agronomy , zoology , botany , chemistry , materials science , biology , composite material , engineering , geotechnical engineering
Summary and ConclusionsTung seeds, hulled but with most of the shells intact, were artificially dried at two temperatures in December and January and put in storage in bags in a well ventilated shed, along with similar seeds which had not been artificially dried. At bimonthly intervals tests on stored seeds were made on a commercial serew press. The acid value of oil in the intact seeds put in storage at 10% moisture content early in December and late in January had risen only slightly, from 5 to 0.8–1.5, by the following April. Intact seeds dried to about 10% moisture at temperatures of 158° F. and about 172° F. (155–190° F.) processed in the screw press as well the following April as they did when put in storage in early December, and there was no deterioration in the quality of the oil. Intact seeds which were dried from 26% moisture to about 10% moisture in late January at 155–212° F. (the temperature remained at 212° F. for at least an hour) did not process efficiently after two months' storage, nor did the material stored at the same time without artificial drying. Caution should be used in storing seeds for long periods after drying at temperatures approaching 212° F. or with high moisture contents (20% or above) until more experience is available.