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A. M. Altschul

Bio: A. M. Altschul is an academic researcher from United States Department of Agriculture. The author has contributed to research in topics: Cottonseed & Respiration. The author has an hindex of 3, co-authored 3 publications receiving 34 citations.
Topics: Cottonseed, Respiration, Chloride, Sodium, Fatty acid

Papers
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Journal ArticleDOI
01 Dec 1943
TL;DR: In this paper, the color of the oils obtained by solvent extraction from ammonia-treated cottonseed is considerably lighter than that of oils obtained from untreated cottonseed, and it has been shown to reduce selfheating of the seed and the rate of formation of free fatty acids during storage.
Abstract: Treatment of moist cottonseed with ammonia prior to storage has been shown to reduce self-heating of the seed and the rate of formation of free fatty acids during storage. The color of oils obtained by solvent extraction from ammonia-treated cottonseed is considerably lighter than that of oils obtained from untreated cottonseed.

14 citations

Journal ArticleDOI
TL;DR: Malowan (17) found that sodium chloride decreased the rate of evolution of carbon dioxide from moist cottonseed and that alcohol, acetic acid, sulphuric acid, and formalin inhibited respiration, and concluded that the carbon dioxide evolution observed under his experimental conditions was caused not by theaction of micro-organisms but rather by the action of enzyme systems operating in the seed.
Abstract: One of the earliest attempts to apply chemical treatment as a means of inhibiting the heating and lipolysis of cottonseed during storage was made by Barrow (4), who used sodium chloride as the effective chemical agent. The application of 5 per cent, of sodium chloride to moist cottonseed had a twofold effect. First, as a result of the high salt concentration outside the seeds, considerable moisture was withdrawn from within. Secondly, small quantities of the salt which diffused into the seed inhibited the biological processes responsible for heating and lipolysis. Malowan (17) found that sodium chloride likewise decreased the rate of evolution of carbon dioxide from moist cottonseed and that alcohol, acetic acid, sulphuric acid, and formalin inhibited respiration. He found that certain disinfectants, such as copper sulphate and mercuric chloride, had no effect on the rate of respiration and concluded, therefore, that the carbon dioxide evolution observed under his experimental conditions was caused not by the action of micro-organisms but rather by the action of enzyme systems operating in the seed.

13 citations


Cited by
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Journal ArticleDOI
01 Jan 1944
TL;DR: A method for the purification of gossypol has been developed which yields material differing in optical properties from those previously reported for gossYPol preparations, and a colorimetric test for extractable gossymetry has been described.
Abstract: A method for the purification of gossypol has been developed which yields material differing in optical properties from those previously reported for gossypol preparations A colorimetric test for extractable gossypol has been described It has been shown that cottonseed contains at least three pigments in addition to gossypol Some of the properties of the three pigments have been reported One of these newly detected pigments, gossypurpurin, has been shown to be the substance which, mixed with gossypol, constitutes the so-called “red gossypol” of Podol’skaja The frequently reported water-dispersable blue pigment of cottonseed has been shown to be either a complex of gossypol, gossypurpurin and protein or a mixture of two protein-pigment complexes Its dissociation into the two pigments and protein has been accomplished

47 citations

Journal ArticleDOI
TL;DR: In this paper, it was shown that ATP at 0.2 mm appeared to either wholly or partially prevent the ammonia-induced inhibition of water uptake by roots, which may indicate that the site of the inhibition lies within the root epidermis.
Abstract: Ammonium sulfate, ammonium carbonate or ammonia gas inhibited water uptake in sugar beet roots whenever the pH was sufficiently high to cause the production of ammonia. When ammonia was removed by aeration, inhibition of the water uptake by roots was rapidly reversed. ATP at 0.2 mm appeared to either wholly or partially prevent the ammonia-induced inhibition of water uptake by roots. ATP may be involved in maintaining the structure of water pathways through the root. In roots lacking epidermis, ammonia did not inhibit water uptake by the roots. This may indicate that the site of the inhibition lies within the root epidermis.

23 citations

Journal ArticleDOI
TL;DR: The existence of a highly resistant pigment gland wall has been proposed to explain the anomaly of the relative stability of reactive polyphenolic pigments in cottonseed as well as changes which occur during the storage of moist cottonseed.
Abstract: 1. The cottonseed pigment gland has been shown to possess a rigid, thick wall inclosing a gelatinous suspension of the gland pigments. 2. The gland wall consists of five to eight irregularly shaped, curved plates,which appear to be composed of cellulose impregnated with pectin, hemicellulose, and other unidentified uronic acid derivatives. The glands are heavily incrusted with cutin. 3. The pigment glands have been shown to be resistant to the action of most reagents except water and polar organic liquids of low molecular weight. Their reaction to water consists in the immediate rupture of the wall along one or more of the seams between the plates, followed by expulsion of the gland contents as finely divided suspended particles. Water-miscible, polar organic liquids of low molecular weight affect the glands very much more slowly than water; and the extremely slow action of other organic liquids has been shown to be attributable to their slight moisture content. 4. The existence of a highly resistant pigm...

20 citations