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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 45 (1980), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Treatment of either of the stable anhydrous crystalline forms of or-lactose with potassium methoxide in methanol at reflux does not result in the formation of β-lactose, whereas the latter is formed from α-lactose monohydrate or hygroscopic anhydrous α-lactose under these conditions. We find that when β-lactose is added to a reaction mixture containing either form of stable anhydrous α-lactose, conversion of α-lactose to β-lactose proceeds readily. Further, we show that this conversion may be a solid-solid transformation rather than dissolution of α-lactose followed by crystallization as β-lactose.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 44 (1979), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The sweetness of lactulose over the range of concentration 5–35% (W/V), measured by a trained panel using paired comparison with standard reference solutions of sucrose of varying concentrations, is 48% to 62% of that of sucrose. In addition, sensitivity thresholds and recognition thresholds for sweetness of lactulose and sucrose were determined by a rating-scale method. The sweetness of a mix ture containing 10% (W/V) lactulose and 5% (W/V) sucrose showed a synergistic effect of 22%, and a mixture of 5% (W/V) lactulose and 2.5% (W/V) sucrose showed 12% synergism. Partial hydrolysis of lactulose to give a mixture containing 5% (W/V) lactulose, 2.5% (W/V) galactose, and 2.5% (W/V) fructose caused a 6% synergistic effect on sweetness.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 187 (1960), S. 1110-1111 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Enzymes which hydrolyse simple glycosides exhibit extremely high specificity for the glycosyl radical of the molecule, whereas the structure of the aglycone group usually is important in a quantitative, rather than qualitative, sense2*3. Glycosidases that degrade polysaccharides (I) appear to ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 48 (1983), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A major component of the free carbohydrate pool from defatted soybean and peanut flours, initially resolved but not identifiable by HPLC, was isolated using cocoanut charcoal chromatography. Spectrophotometric and chromatographic analyses of the isolated component indicated the presence of glucose, fructose and galactose. After standing at 27°C for several weeks, the syrupy material transformed into a mixture of stachyose and sucrose. Their identities were confirmed by melting point, optical rotation, chromatography, and 13C NMR. It is proposed that the initial compound was a stachyose-sucrose complex.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 46 (1981), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The sweetness of α-, β-, and equilibrium lactose, measured by a trained panel using paired comparison with standard reference solutions of sucrose of concentrations from 0.50–6.50%, ranged from 30–35% that of sucrose. The sweetness of β-lactose was 105–122% that of α-lactose. The predicted swweetness of lactose at mutarotation equilibrium, calculated from sweetness values for α- and β-lactose and from the relative amounts present as determined by polarimetry, i.e., 38%α and 62%β, did not differ significantly from the experimentally determined sweetness value, indicating an absence of synergism for sweetness in mixtures of α- and β-lactose. Isosweet sucrose concentrations for three different concentrations of β- and equilibrium lactose and two concentrations of α-lactose are reported.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Ultrafiltrate derived from Cheddar cheese whey was demineralized first by removal of divalent cations followed by removal of monovalent cations. The yield of α-lactose monohydrate, crystallized from 50% (W/W) aqueous solution, was significantly greater from the completely deionized solution compared with the yields from ultra-filtrate from which only divalent cations had been removed or from ultrafiltrate which did not receive treatment with thermally regenerable ion-exchange resins.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 991-992 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The requisite carbonyl groups for activation of the C H bond are found as aldehyde groups. The oxidation of the C H group creates new a-glycol centres and further oxidation (over-oxidation) ensues. The oligosaccharide is therefore slowly eroded from its reducing-end unit with the evolution of ...
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-0832
    Keywords: Aspergillus flavus ; starch ; reducing sugars ; kojic acid ; aflatoxin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Depletion of sugar and starch carbon sources and concomitant formation of secondary fungal metabolites, aflatoxin and kojic acid, were examined in growing corn inoculated with Aspergillus flavus. Kernels from control and inoculated ears were removed and analyzed after 16, 24, 48, 96 and 168 hrs. Reducing sugars were not significantly different for inoculated and control non-inoculated samples, but after 168 hrs (seven days) starch content was 20% lower in inoculated than in control samples. Kojic acid was detected before aflatoxins formed. Kojic acid, the oxidized product of kojic acid, and aflatoxin were all present in samples two days from inoculation. The formation of this oxidation product may influence toxin levels.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 4 (1966), S. 1043-1045 
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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