<scp>D</scp>‐Fructose – Struktur und Eigenschaften

Heyns, Kurt

doi:10.1002/star.19780301007

Cited by 10 publications

(1 citation statement)

References 14 publications

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“…The initial temperature drop observed for the proposed design corresponds to the evaporative cooling mechanism [19][20][21], which took place when water was filled in the device (filling ratio > 0). The temperature remains constant for the rest of filling ratios due to operating at fixed negative suction pressure and the associated efficient utilization of energy as mentioned earlier.…”

Section: Resultsmentioning

confidence: 99%

Experimental Approach to an Efficient and Versatile Water Filtration Vacuum Cleaner

Bakry

2017

Chem Eng & Technol

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A simple and robust suction technique is proposed for vacuum cleaning based on an innovative water filtration method for dry, wet, and water swab modes. The technique relies on applying vacuum above the free surface of water to drive the dust‐laden airstream to be released at constant depth below the water surface. Unlike conventional vacuum cleaner types, experimental measurements revealed that a high negative suction pressure availability and low exhaust air temperature with negligible and irrelevant increase in humidity levels were maintained regardless of the filling state. The proposed technique thus ensures more efficient utilization and conservation of energy.

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Section: Resultsmentioning

confidence: 99%

Experimental Approach to an Efficient and Versatile Water Filtration Vacuum Cleaner

Bakry

2017

Chem Eng & Technol

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Fructose

Cronewitz

Munir

Schneider

et al. 2000

Ullmann's Encyclopedia of Industrial Chemistry

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Aspects of the chemical conversion of glucose

Kieboom

Bekkum

1984

Recl. Trav. Chim. Pays‐Bas

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A . P. G . Kieboom et al. /Aspects of the chemical conversion of glucosecarbohydrate chemistry. Moreover, there is still substantial progress in the science and technology of non--enzymic procedures, which are more generally applicable than enzymatic isomerizations. For instance, the industrial isomerization of lactose into lactulose occurs in aqueous medium with base as the catalyst334, since there is no enzyme system developed as yet for this conversion. The classical paper of Lobry de Bruyn and Alberda van Ekensteid on the interconversion of glucose, fructose and mannose in alkaline solution has been followed by numerous studies on this subject. Enolization is generally accepted6 to be an important first step in the isomerization reaction in alkaline medium as well as in the concomitant degradation reactions, e.g. p-C-0 and p-C-C bond fission. The enediol anion as common intermediate is depicted in Scheme 2. fructose anionThe enediol anion is intuitively considered to exist predominantly in the (2)-configuration, i.e. with the two oxygens in cis-position, with rapid transfer of the hydrogen between the two oxygens. For the interconversion of glucose, fructose and mannose a mechanism has been proposed' which is based on the principle of least motion and which comprises the following features: ( i j fast equilibrium between cyclic sugar anions and their pseudo-cyclic carbonyl structures, as evidenced by I3C NMR spectroscopy8, (iij formation of the enediol anion by a rate-determining, intramolecular proton shift from C-2 (or C-1 for fructose) to the original ring oxygen, leading to pseudo-cyclic (Z)-enediol anions, and (iii) reversal of process (iij, leading, after conformational changes of the enediol anion species, to isomerization. See Scheme 3 for the molecular picture. glucose anion -e x o > u mannose anion _ I 0' enediol anion degradation products Scheme 2. de Bruyn-Alberda van Ekenstein rearrangement.

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D‐Fructose – Struktur und Eigenschaften

Cited by 10 publications

References 14 publications

Experimental Approach to an Efficient and Versatile Water Filtration Vacuum Cleaner

Experimental Approach to an Efficient and Versatile Water Filtration Vacuum Cleaner

Fructose

Aspects of the chemical conversion of glucose

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