Unrefined Oil Research Articles

Selection of lubrication oils for iron-graphite sliding bearings

1. The load-carrying capacity of iron-graphite bearings when lubricated with unrefined oils is 1.5–2 times greater than with refined distillates. 2. The specific pressure of failure of the friction surfaces of iron-graphite bearings depends mainly on the quality of the interaction between the lubricant and the mating surfaces. Iron-graphite becomes inoperative beyond the limits of the efficiency of the lubricant.

The fatty acid composition of the seed fat from Swietenia macrophylla

SummaryA light yellow oil was isolated in 50% yield from the decorticated seeds ofSwietenia macrophylla kina grown in India. The unrefined oil had a slightly bitter taste and an iodine value of 109.7. Other properties are reported.By means of spectrophotometry, fractional crystallization, and methyl ester distillation, the oil was found to have the following fatty acid composition (as %): palmitic, 12.50; stearic, 16.42; arachidic, 0.56; oleic, 25.30; linoleic, 33.87; linolenic, 11.32. These values for linoleic and linolenic acid differ considerably from those previously reported for an oil from the same species grown in Mexico.

Neoplasms in Albino Rats Resulting from the Feeding of Crude Wheat Germ Oil Made by Ether-Extraction

Fourteen rats fed with unrefined wheat germ oil which contained the sediment deposited therefrom developed abdominal tumors. The neoplasm following the ingestion of oil is malignant in nature and microscopically a sarcoma. It is readily transplantable and retains its malignancy through 6 successive implantations.