Research has been published which disclosed that the. proportions of palmitate decreased and oleate increased considerably in the PE and PC remaining after storage of orange juice at 85°F (Nagy and Nordby, 1970). They reported a loss of approximately 90% of the PE and PC during 85°F storage of orange juice. This means that the changes in palmitate and oleate were measured from fatty acid determinations on only the remaining 10% of PE and PC. Also, Nagy and Nordby showed in their Table III that the four major fatty acids in the free fatty acid fraction increased by 85-90% during storage at 85°F. These data do nót indicate any selective hydrolysis of the 90% of PE and PC reported as destroyed, but only that the 10% of unhydrolyzed PE and PC had less palmitate and more oleate than in the initial concentrations of these two phospholipids. These authors postulated that the changes in these two fatty acids were due to a specific action of phospholipases in the juice, resulting in complete hydrolysis of certain phospholipids, as no lyso-phospholipids were detected.
LITERATURE CITED
Material which had accumulated on the inner surface of gin roll boxes during the ginning of immature bolls has been collected and subjected to chemical analysis. This deposit material, which was a dried, hard, dark-brown substance, has been shown to be about 25% protein and 8% lipid, the remainder being fuzz fibers, lint, and seed-coat fragments. The protein had an amino acid composition similar to the protein of cottonseed and the lipid was composed of cotton wax and cottonseed oil. It was suggested that the deposit material originates from immature cottonseed and it may be the same as material that causes saw tooth clogging, which can occur when early season machine-stripped cotton is ginned.
Gossypol has been identified as a component of bract (FDB) from frost-killed, field-grown cotton by its chromatographic behavior on films of silica and cellulose (four eluents and five methods of detection). In addition, a derivative of gossypol was detected, and it was shown chromatographically that
Wool sliver, that had undergone a corona discharge treatment in an air-chlorine atmosphere, deposited a white powderlike substance on the spinning frame. The deposit was shown by TLC and IR to be essentially protein, with a qualitative amino acid composition that suggested it originated from the wool surface (cuticle), and contained <5% lipid. The deposit contained only cysteic acid in addition to the normal amino acids. The chemical findings suggested that air-chtorinecorona treatment only slightly chemically alters the surface of wool fiber. However, the scale edges of this wool in yam appeared worn and it did not normally give a positive Allwörden reaction; thus, air-chlorine-corona wool is more readily damaged by processing from sliver to yarn than untreated or air-corona wool. It is suggested that a systematic study of dyeing and finishing of air-chlorine-corona wool in fabric would be beneficial.
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