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  • 1975-1979  (22)
  • 1935-1939  (2)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 26 (1978), S. 1444-1446 
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 61 (1939), S. 577-581 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 41 (1976), 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: Cranberry juice cocktail was chosen as a typical red fruit juice. Samples were heated at 65°C to simulate pigment degradation on storage. The heated samples were ranked for color visually and objectively using a Hunter Color Meter, a Gardner Color Meter and a G.E. recording spec-trophotometer. Most functions of color obtained from the instrument correlated highly with visual color except dominant wavelength, hue, and Hunter and Gardner b. Most instrumental values also correlated well with anthocyanin concentration except the three above. The expanded L, a*, b* scales, which were developed in previous work to eliminate the inversion of tristimulus scales with pigment concentration with dark beverages, also gave very high correlations with visual evaluations and with anthocyanin concentrations.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 40 (1975), 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
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 41 (1976), 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 anthocyanin and flavonol pigments of the miracle fruit (Synsepalum dulcificum, Schum) were isolated and identified by paper chromatography and spectral analysis. The red pigments of miracle fruit (14.3 mg/100g fresh wt) were cyanidin-3-monogalactoside, cyanidin-3-monoglucoside, cyanidin-3-monoarabinoside, delphinidin-3-monogalactoside and delphmidin-3-monoarabinoside existing in a ratio of 188:62:9:5:2, respectively. The major flavonol pigments were quercetin-3-monogalactoside, kaempferol-3-monoglucoside, myricetin-3-monogatactoside and traces of similar flavonols. The aglycones quercetin, kaempferol and myricetin were also isolated and identified. The flavonols and aglycones were present at 9.0 mg/100g fresh wt.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 40 (1975), 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
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 41 (1976), 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: Six lots of dry cereals were chosen to develop guide lines for production line color control. Each pair were samples representing the finished product and the base product. The first pair was tan colored cubes, the second pair was red spheres and the third, orange spheroids. The samples in each pair were very similar in color by visual examination. Four instruments were tested for their ability to distinguish between the samples in each pair. A Color Eye instrument, modified for small area viewing (5 mm diam) could be used to separate the samples in each pair. Similarly, a General Electric Recording Spectrophotometer could also be used to separate the samples in each pair, but with both instruments, the mean values for each pair were close and the coefficient of variability high. Measurement of individual pieces of cereal was deemed impractical. A Hunter Color Difference Meter could also be used to separate the samples in each pair with a low coefficient of variability. An Agtron large area viewer was the most successful instrument in separating the samples in each pair. The differences in the averages between each pair were large due to the scale expansion facility, and the coefficient of variability was low. The red mode was most successful for the tan and red samples and the green mode most appropriate for the orange samples.
    Type of Medium: Electronic Resource
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  • 8
    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 red-violet pigment that occurs abundantly in nature as a beta-cyanin-betaxanthin complex in pokeberries (Phytolacca americana) may have potential as a food colorant. However, the berries of this plant contain a toxic saponin which must be removed prior to consideration of the pigment as a food colorant. A method involving butanol, acetone and ethyl ether was devised for the solvent extraction of the saponins from the pokeberries and/or beets (Beta vulgaris). The method was found to be effective for the isolation and purification of phytolaccanin and/or betanin pigments. As much as 97 per cent of the saponins were removed.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 43 (1978), 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 red anthocyanin pigments of Miracle fruit, Synsepalum dulcificum, Schum were extracted, purified by ion exchange, and concentrated for use as a food colorant. The pigment preparation, when added to carbonated water and carbonated sugar solutions, provided an orange red solution with stability comparable to that of anthocyanins from other sources. At pH 1.0, in water, the ratio of the extinction coefficient of the pigment preparation compared to that of FD&C Red No. 2 was 2.03. At pH 2.8 and 3.0 the ratios were 1.2 and 0.85, respectively. When the pigment preparation was added to model systems containing acetic, tartaric, citric and malic acids, pigment degradation was most rapid with malic acid.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial & engineering chemistry 30 (1938), S. 146-153 
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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