Charles W. Deyoe

Synthesis of 6-fatty acid esters ofl-ascorbic acid

Abstract and SummaryHigh yields (85%) of 6-fatty acid esters ofl-ascorbic acid were obtained by reactingl-ascorbic acid (1.2 M) in 98~99% sulfuric acid for 36 hr at 20 C with 36% excess fatty acid. In concentrated sulfuric acid,l-ascorbic acid was rapidly sulfated to produce mainlyl-ascorbyl 6-sulfate, which slowly reacted with fatty acid to producel-ascorbyl 6-acylate.

Synthesis and stability of L-ascorbate 2-sulphate

L-Ascorbate 2-sulphate (I) has been isolated in 75–80% yield by two methods. In a modified conventional procedure, tertiary amine salts of 5,6-acetal derivatives of L-ascorbic acid were sulphated with an amine–sulphur trioxide complex in a dipolar aprotic solvent. In an alternative procedure, L-ascorbate (II) was sulphated rapidly and almost quantitatively by treatment with trimethylamine–sulphur trioxide in alkali (pH 9·5–10·5) at 70°. L-Ascorbate 2-sulphate (I) was 20 times more stable than L-ascorbate to oxygen (air) in boiling water. In boiling alkali (pH 13·0) it had a half-life of 21 h, whereas in boiling acid (pH 1·0) its half-life was 4·7 min. Loss of sulphate from L-ascorbic acid 2-(hydrgen sulphate)(III) was 1500 times faster in 99% methanol than in water at 50°.

Effect of particle size of corn and sorghum grain on performance and digestibility for weaned pigs

This report is brought to you for free and open access by New Prairie Press. It has been accepted for inclusion in Kansas Agricultural Experiment Station Research Reports by an authorized administrator of New Prairie Press. Copyright 1983 Kansas State University Agricultural Experiment Station and Cooperative Extension Service.

Performance of young pigs fed sorghum grain damaged by lesser grain borer or fungal invasion

This report is brought to you for free and open access by New Prairie Press. It has been accepted for inclusion in Kansas Agricultural Experiment Station Research Reports by an authorized administrator of New Prairie Press. Copyright 1984 Kansas State University Agricultural Experiment Station and Cooperative Extension Service.

Performance of weanling pigs as influenced by feeding insect-and fungal-damaged grain sorghum

This report is brought to you for free and open access by New Prairie Press. It has been accepted for inclusion in Kansas Agricultural Experiment Station Research Reports by an authorized administrator of New Prairie Press. Copyright 1981 Kansas State University Agricultural Experiment Station and Cooperative Extension Service.

Pelleting corn-soybean meal swine diets

This report is brought to you for free and open access by New Prairie Press. It has been accepted for inclusion in Kansas Agricultural Experiment Station Research Reports by an authorized administrator of New Prairie Press. Copyright 1978 Kansas State University Agricultural Experiment Station and Cooperative Extension Service.