Complexation in Benzo-15-Crown-5–Chloroform–Substituted Acetic Acid Extraction Systems

Acetone has been isolated by permanganate oxidation of birch and spruce lignins extracted from wood by acetic or formic acid. Acetone was obtained also when the formic acid lignins were ozonized but not from the acetic acid – extracted lignins. This difference was confirmed when perbenzoic acid titration indicated unsaturation in the formic acid extract which was not present in the acetic acid extract. It is suggested that an α-hydroxy-β-methoxyisobutyl group is present in lignin; during acetic acid extraction the hydroxyl group is acetylated but during formic acid extraction the formic acid reduces the group to isobutenyl, which will give acetone when it is ozonized.

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Acetic Acid Extraction by Solvent Membrane

Separation Science and Technology ◽

10.1080/01496398308060285 ◽

1983 ◽

Vol 18 (5) ◽

pp. 421-440 ◽

Cited By ~ 28

Author(s):

Yue Kuo ◽

Harry P. Gregor

Keyword(s):

Acetic Acid ◽

Acid Extraction ◽

Acetic Acid Extraction

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Isolation of collagen from the skins of Ehlers-Danlos syndrome-affected dogs by acetic acid extraction and pepsin digestion

Biochimica et Biophysica Acta (BBA) - Protein Structure ◽

10.1016/0005-2795(80)90212-3 ◽

1980 ◽

Vol 626 (1) ◽

pp. 208-217 ◽

Cited By ~ 3

Author(s):

David F. Counts

Keyword(s):

Acetic Acid ◽

Acid Extraction ◽

Ehlers Danlos Syndrome ◽

Pepsin Digestion ◽

Acetic Acid Extraction ◽

Danlos Syndrome

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The residual effect of pasture cobalt applications on some soils in South East Scotland

The Journal of Agricultural Science ◽

10.1017/s0021859600038211 ◽

1979 ◽

Vol 93 (2) ◽

pp. 509-511 ◽

Cited By ~ 7

Author(s):

R. G. McLaren ◽

D. Purves ◽

E. Jean Mackenzie ◽

C. G. Mackenzie

Keyword(s):

Acetic Acid ◽

Research Council ◽

Agricultural Research ◽

Residual Effect ◽

Cobalt Concentration ◽

Acid Extraction ◽

Agricultural Research Council ◽

Acetic Acid Extraction ◽

Appreciable Increase ◽

Cobalt Deficiency

There are extensive areas in Scotland and other parts of Britain where, because of low soil cobalt status, the cobalt concentration of pasture herbage is below the 0–1 /fg/g D.M. regarded as the requirement for grazing ruminants (Agricultural Research Council, 1965). A common method of overcoming the effects of cobalt deficiency in livestock occurring within these areas is to apply cobalt sulphate to the pasture. Following work carried out by Stewart, Mitchell & Stewart (1941, 1942) and Stewart etal.(1946) the standard recommended application of cobalt sulphate for pasture has remained at 2 kg/ha for many years, an application generally expected to last for 3–5 years. However, in South East Scotland there are doubts about the adequacy of such treatment which has led to a reappraisal. Significant increases in uptake of cobalt by herbage following applications to land at this rate are not always observed and sometimes there is no appreciable increase in ‘available’ soil cobalt as determined by acetic acid extraction.

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