The Sweetness Profiles of Glycosyl Rebaudioside A and Binary Mixtures with Sugar Alcohols in Aqueous Solution and Lemonade Model System

We use the model system ethanol–dodecane to demonstrate that giant critical fluctuations induced by easily accessible weak centrifugal fields as low as 2000g can be observed above the miscibility gap even far from the critical point of a binary liquid mixture.

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Non-Isothermal Phase Change Behaviors of Binary Mixtures of D-Dulcitol and Pentaerythritol As Novel Heat Storage Materials

Volume 6B: Energy ◽

10.1115/imece2018-87643 ◽

2018 ◽

Author(s):

Xue-Feng Shao ◽

Jun Wang ◽

Li-Wu Fan

Keyword(s):

Melting Point ◽

Phase Change ◽

Binary Mixtures ◽

Latent Heat ◽

Mass Fraction ◽

Heat Storage ◽

Solid Phase ◽

Sugar Alcohols ◽

Nucleation Agent ◽

Latent Heat Storage

As a promising Phase Change Material (PCM) candidate for low-to-medium temperature (100–250 °C) latent heat storage, sugar alcohols undergo serious supercooling during cool-down for crystallization. Technical efforts need to be dedicated to suppression or control of the supercooling of sugar alcohols. In this work, the supercooling of D-dulcitol, with a melting point of around 186 °C, was attempted to be reduced by mixing with a solid-solid PCM Pentaerythritol (PE) as the nucleation agent, which has a solid-solid phase transition temperature (∼186 °C) similar to the melting point of d-dulcitol. Such novel binary mixtures were prepared by dispersing PE powders at various mass fractions into d-dulcitol melt. The non-isothermal phase-change-related properties, with emphasis on the crystallization properties, were tested on a heat-flux differential scanning calorimeter at a constant heating/cooling rate of 5 °C/min. The preliminary results showed that both the crystallization point and latent heat of crystallization strongly depend on the mass fraction of PE, and both decrease in magnitude with the increasing in mass fraction of PE. The degree of supercooling of the binary mixtures also depend on the mass fraction of PE, and a reduction of up to 10 °C was obtained at 50 wt.% PE, as a result of the decrease in the melting points of the binary mixtures.

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Collaborative Study of the Gas-Liquid Chromatographic Determination of Sorbitol in Bakery Products

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/56.1.66 ◽

1973 ◽

Vol 56 (1) ◽

pp. 66-67

Author(s):

Harvey K Hundley

Keyword(s):

Aqueous Solution ◽

Acetic Anhydride ◽

Collaborative Study ◽

Chromatographic Determination ◽

Bakery Products ◽

Sugar Alcohols ◽

Flame Ionization ◽

Liquid Chromatographic Determination ◽

Liquid Chromatographic

Abstract A GLC method for the determination of sorbitol has been collaboratively studied. Sugar and sugar alcohols are extracted from the bakery products by methanol and the solvent is evaporated. Acetate derivatives are then formed by addition of acetic anhydride in pyridine, and the derivatives are extracted from an aqueous solution with chloroform and analyzed by flame ionization GLC. Collaborative results show a recovery ranging from 90 to 102% sorbitol from bakery products containing 1.5 to 7% sorbitol. The method has been adopted as official first action.

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Studying the concentration dependence of the aggregation number of a micellar model system by SANS

Soft Matter ◽

10.1039/c5sm00469a ◽

2015 ◽

Vol 11 (21) ◽

pp. 4208-4217 ◽

Cited By ~ 12

Author(s):

Matthias Amann ◽

Lutz Willner ◽

Jörg Stellbrink ◽

Aurel Radulescu ◽

Dieter Richter

Keyword(s):

Aqueous Solution ◽

Concentration Dependence ◽

Aggregation Number ◽

Model System ◽

Polymer Micelles ◽

P Concentration

Concentration dependence of the aggregation number of n-octacosanyl-PEO polymer micelles in aqueous solution determined by SANS experiments.

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DETERMINATION OF GLYCEROL AND RELATED COMPOUNDS IN FERMENTATION SOLUTIONS BY PARTITION CHROMATOGRAPHY

Canadian Journal of Research ◽

10.1139/cjr50b-064 ◽

1950 ◽

Vol 28b (9) ◽

pp. 535-540 ◽

Cited By ~ 13

Author(s):

A. C. Neish

Keyword(s):

Aqueous Solution ◽

Periodate Oxidation ◽

Colorimetric Determination ◽

Partition Chromatography ◽

Sugar Alcohols ◽

Modified Technique ◽

Silica Column ◽

To Receive ◽

Related Compounds

A modified technique is described for applying partition chromatography, using a silica column, to the separation of simple organic compounds which are difficult to extract from water. An aqueous solution is pipetted directly on a Celite–water column the upper 15% of which has been left dry to receive it. Acetoin, 2, 3-butanediol, 1, 2-propanediol, ethanediol, glycerol, and erythritol can be separated from each other and from sugars and sugar alcohols containing five or more carbon atoms if the column is properly developed by ethyl acetate and benzene–butanol mixtures. After separation the compounds can be estimated by a rapid colorimetric determination of the acetaldehyde or formaldehyde formed by periodate oxidation. The recoveries are quantitative, thus making it possible to determine 1 to 2 mgm. of glycerol or 2, 3-butanediol within an error of ± 3% even when they are mixed with larger amounts of closely related compounds which cause interference in the usual methods.

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