Action de l'eau bouillante sur la fructose

Bruyn, C. A. Lobry de; Ekenstein, W. Alberda van

doi:10.1002/recl.18970160904

Cited by 10 publications

(3 citation statements)

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“…In one case condensation led to a substance which analyzed for C40H40O11N2 but which was also noncrystalline. FOR 50 years sugar chemists have been puzzled by the true chemical nature of glutose postulated in 1897 by de Bruyn and van Ekenstein (6). They claimed that the unfermentable reducing substance in molasses and that which they obtained from fructose or glucose by treatment with weak alkali, or by heating fructose in aqueous solution, ara identical.…”

Section: Discussionmentioning

confidence: 99%

Chemical Nature of Glutose

Clark¹,

Kao²,

Sattler³

et al. 1949

Ind. Eng. Chem.

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curve ifi the result of an average of three identical samples of LITERATURE CITED each OF the preservatives represented.Other evaporation or permanency studies are being made and from these, curves will be plotted to show not only the permanency of the oils but also the permanency of toxicity of the oils.It is believed that such a study will be even more important in revealing the true value of a hydrocarbon wood prescrving oil in its relation to the protection of wood over the expected life of the treated product.Snell and Shipley (9) pointed out the difference between permanency and permanency of toxicity, and further showed some of the relations between these factors and tho distillation pattern and specific gravity of the whole oil. CONCLUSION.Is a result of studies to date, it would appear that new source, of wood-preserving oils may be developed and specifications may bo drawn for all hydrocarbon-wood-preserving oils from whatever source they may be derivrd.(1) Baechler, It.

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Section: Discussionmentioning

confidence: 99%

Chemical Nature of Glutose

Clark¹,

Kao²,

Sattler³

et al. 1949

Ind. Eng. Chem.

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“…As shown by the classical work of Lobry de Bruyn and van Ekenstein [13] and Nef [14], when d-fructose is treated with alkali it is converted in part to glucose and mannose. One might anticipate that the aldehydo form of turanose would yield, according to the followin g diagram, 3-a-d-glucosido-d-glucose (formula VI) and 3-a- H~OH H~OH…”

Section: Lobry De Bruyn Interconversion Reactionmentioning

confidence: 98%

Hydrolysis of turanose in alkaline solution

Isbell¹

1941

J. RES. NATL. BUR. STAN.

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Turanose (3-a-d-glucopyranosido-d-fructose) differs from the more common disaccharides in that the glycosidic union is on the carbon adjacent to the reducing group. The proximity of the reducing group influences the stability of the glycosidic union and causes the disaccharide to be particularly susceptible to alkaline hydrolysis. On treatment with limewater, turanose undergoes hydrolysis rather than a normal Lobry de Bruyn interconversion. In the presence of oxygen, in alkaline solution, the sugar is hydrolyzed in large measure and the resulting glucose and fructose are oxidized to arabonic acid. On the other hand, lactulose (4-p-d-galactopyranosido-d-fructose) is relatively stable to alkaline hydrolysis, and when treated with oxygen in solution containing potassium hydroxide it yields the salt of a disaccharide acid, presumably 3-p-d-galactopyranosido-darabonic acid. The difference in the behavior of the two sugars illustrates the importance of the location of the glycosidic union in relation to the behavior of the sugars in alkaline solution. The location of the glycosidic union also affects the amount of reduction with alkaline copper reagents. Copper-reducing values by the Munson-Walker method are reported for turanose at several concentrations CONTENTS

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“…B. Rearrangement to form other carbohydrates: the de Bruyn and van Ekenstein transformation One of the most important rearrangements which reducing monosaccharides undergo in alkaline solutions is that described by Lobry de Bruyn and Alberda van Ekenstein (7) in a series of papers published in the 1890's. These were occasioned by an observation of de Bruyn ( 6), who had noted that the optical rotatory power of dilute solutions of glucose containing small concentrations of potassium hydroxide diminished in value over a period of time and finally tended toward 0°.…”

Section: Rearrangement Of Carbohydrates In Alkaline Solutionmentioning

confidence: 99%

Some Less Familiar Aspects of Carbohydrate Chemistry.

Evans¹

1942

Chem. Rev.

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Action de l'eau bouillante sur la fructose

Cited by 10 publications

References 0 publications

Chemical Nature of Glutose

Chemical Nature of Glutose

Hydrolysis of turanose in alkaline solution

Some Less Familiar Aspects of Carbohydrate Chemistry.

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