Corn Germ Oil Research Articles

Effect of Gamma Rays on Corn Grains. Part III. Effect of Post‐Irradiation Storage on Some Technological Properties of Corn Grains and Fatty Acids

AbstractThe effect of storage after irradiation of corn grains on steeping process, starch isolation, quality of by‐products and fatty acids composition of germ oil was investigated. It was found that post‐irradiation storage led to a decrease in water absorption and protein solubilization during steeping process. The starch yield was lower, contained a high percentage of protein and was darker from above 500 Krads. Post‐irradiation caused a change in the proportions and disappearance or induced new fatty acids in the corn germ oil.

Determination of phenolic plastic additives in edible oils by thin-layer chromatography

An analytical method has been developed for the determination of five sterically hindered phenolic plastic additives in different edible oils. The procedure is based on thin-layer chromatography (TLC), after extraction of the additives from the matrix. The co-extracted oil components are eliminated by the use of pre-treated-silica plates. The additives are revealed according to the procedure developed by Boute and determined quantitatively by a monochromator TLC scanner. The detectable concentration of the individual antioxidants, in 5 g of the oil, ranges from 50 ppb 1 1 Throughout this article, the American billion (10 9) is meant. to 2 ppm, depending on the nature of the additive and the oil. The validity of the proposed method is based on investigations using sesame oil, safflower oil, sunflower oil, corn-germ oil and olive oil.

Fatty acid composition of corn endosperm and germ oils as influenced by different extraction procedures

AbstractGas liquid chromatography was used to determine fatty acid composition of oil obtained from corn (Zea mays L.) inbred lines by different extraction procedures. Kernels were separated into endosperm and germ fractions for nine inbreds which had a considerable range in fatty acid composition of oil. Oil obtained from the endosperm by different extraction procedures was significantly different in composition for all fatty acids. Oil obtained from the germ by different extraction procedures was similar in fatty acid composition. The differences in response of endosperm and germ oils to extraction procedures were attributed to the type of lipid found in each fraction. It was concluded that choice of extraction procedures was of little importance in studies of oil from the corn germ, but that specific extraction procedures must be recognized as a factor when studying oil composition of the endosperm.

Sterol content of some plant oils; further observations on fast-reacting sterols.

AbstractTotal and free sterols were measured by a modified Sperry‐Webb procedure in raw and refined corn, cottonseed, safflower seed, linseed, soybean and wheat germ oils. Wheat germ and safflower seed oil sterols were relatively rich in fastreacting sterols, which predominated in the sterol ester fraction. Photometric constants following color reaction were obtained for cholesterol and plant sterols and applied to a procedure for analysis of cholesterol and plant sterols in mixtures thereof.

Isolation of Dihydro-β-sitosteryl Ferulate from Corngerm Oil.

トウモロコシ胚芽油からフェノール性物質としてクロマトグラフィーによってジヒドロ-β-シトステリン-フェルラ酸エステルmp156°～157℃, [α]D+13.1°, λmax231mμ(e12270) , λmax290.5mμ (e18380) およびλmax314.5mμ (e21460) (ヘプタン溶液) を分離し, ケン化してその成分を確かめた。その結果ステリンが天然にフェルラ酸エステルとしても存在することを知り得た。

Extraction of corn oil by three petroleum solvents

Summary and conclusionsRate‐extractions of corn germ oil by heptane, isoheptane, and hexane at the same temperature showed the latter two to be better solvents than heptane. Extraction rate increased with the temperature.Countercurrent extraction in a continuous laboratory pilot plant showed hexane at 157°F. apparently equal to iso‐heptane at 192°F. It is suggested that the boiling of the hexane at 157°F. might account for the better extraction.It can be concluded that hexane is at least as good a solvent for the extraction of corn oil from whole germ as is iso‐heptane.

A METHOD FOR MEASUREMENT OF CELL‐ELONGATION‐PROMOTING ACTIVITY OF PLANT GROWTH‐REGULATORS

THE NAME auxin was introduced by K6gl and Haagen Smit (1931) to designate a particular substance (auxentriolic acid) which they had isolated from urine and which exhibited activity in the Avenra curvature test of Went (1928). Later, a second compound (auxenolonic acid) with similar activity and closely related structure was obtained from corn germ oil and termed auxin b (Kogl et al., 1933), the first substance being then specified as auxin a. When still later a third active compound of quite different structure was isolated from urine it was named heteroauxin (K6gl et al., 1934). The identification of heteroauxin as indole-3acetic acid led rapidly to the discovery that a considerable number of compounds possess activity in the Avena test. Subsequently the generic term auxins has been endowed with a number of different meanings by various workers. Some use it very broadly to embrace all chemicals with plant growthregulatory activity of any kind, while others employ it in a much narrower sense to cover only those substances which bring about growth by cell elongation, and still other investigators would further limit the term to compounds active in the so-called standard Avena curvature test. The last restriction seems unduly arbitrary and would appear to be unfortunate if it tends to obscure the contribution to understanding of the mode of action of these substances that can be made by other techniques which also depend upon stimulation of cell enlargement.