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  • 1
    Electronic Resource
    Electronic Resource
    Isolation and identification of cyclitols in carob pods (Ceratonia siliqua L.) (1986)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 34 (1986), S. 827-829 
    Details
    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
    URL: http://dx.doi.org/10.1021/jf00071a015
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Isolation and indentification of amino acid derivatives from yeast (1982)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 30 (1982), S. 439-442 
    Details
    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
    URL: http://dx.doi.org/10.1021/jf00111a007
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Changes in sugars, acids, and amino acids during ripening and storage of apples (cv. Glockenapfel) (1992)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 40 (1992), S. 1131-1134 
    Details
    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
    URL: http://dx.doi.org/10.1021/jf00019a008
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  • 4
    Electronic Resource
    Electronic Resource
    Neutral-sugar determination by HPAEC-PAD to characterise polysaccharide degradation by colonic bacteria (1997)
    Springer
    Zeitschrift für Lebensmittel-Untersuchung und -Forschung 205 (1997), S. 257-261 
    Details
    ISSN: 1431-4630
    Keywords: Key words Neutral-sugar analysis ; HPAEC-PAD ; In vitro fermentation ; Oat bran ; β-Glucan
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  In vitro methods are widely used to characterise dietary fibre fermentability in the human hind gut. The activity of faecal bacteria can be followed by measuring fermentation products and substrate degradation. This paper describes a method for establishing neutral-sugar profiles by HPAEC-PAD during in vitro fermentation studies. Freeze-dried fermentation residues are hydrolysed with H2SO4, and the monomers are separated on an anion-exchange column using a reverse NaOH gradient. Sulphate ions are removed from hydrolysates on-line with a special ion-exchange guard column. 2-D-deoxyribose is used as internal standard for quantification. A method for separating all neutral sugars that typically occur in dietary fibre is given. Possibilities for enhancing the resolution for other purposes are suggested. Compared to GC the described method is particularly attractive for routine analyses. Data relating to the decreasing levels of neutral sugars in fermentation residues of oat bran fractions that differ in their mixed-linked β-glucan content are given and degradation patterns of the polysaccharides present in these substrates are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002170050161
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  • 5
    Electronic Resource
    Electronic Resource
    Isolation of Low-Molecular-Weight Taste Peptides from Vacherin Mont ?Or Cheese (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 56 (1991), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Vacherin cheese samples weie extracted with water and the extracts fractionated by ultrafiltration excluding compounds with a molecular weight less than 1,000. Extract aliquots were fractionated by ligand exchange chromatography on a Sephadex derivative containing N-(2-pyridylmethyl)glycine-groups in Cu2+ form, permitting a specific group separation of peptides. Five peptide sub-groups were then chromato-graphed on Aminex A6 and Durrum DC 4 resin. Nine fractions from these separations were characterized by manual gas-phase isofhiocy-anate degradation and HPLC of the amino acid derivatives. Seven peptides could be identified: H-Leu-Pro-OH, H-Val-Pro-OH, H-Phe-Pro-OH, H-Lys-Pro-OH, H-Gly-Pro-Val-Arg-OH, H-Tyr-Pro-OH, and H-Arg-Pro-OH. A partial elucidation of the structure was possible for peptides containing Asp/Pro/Val/Leu, Glu/Leu, and Ala/Pro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1991.tb14611.x
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  • 6
    Electronic Resource
    Electronic Resource
    Bestimmung von biogenen Aminen mit RP-HPLC zur Erfassung des mikrobiellen Verderbs von Schlachtgeflügel (1988)
    Springer
    European food research and technology 187 (1988), S. 121-124 
    Details
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Zusammenfassung Zur Bestimmung biogener Amine aus Schlachtgeflügel wird ein einfach durchzuführendes Analysenverfahren beschrieben. Die Amine wurden mit 0,6m-Perchlorsäure extrahiert, nach Dansylierung auf einer RP-18 Säule aufgetrennt und bei 254 nm detektiert. Innerhalb von 7 min konnte eine gute Auftrennung von 8 Aminen erreicht werden. Zur quantitativen Erfassung von Spermin und Spermidin mußte der Extrakt zusätzlich über Amberlite CG 50 gereinigt werden. Die Wiederfindungsraten betrugen 82% bis 96%, die Nachweisgrenzen 0,2 bis 0,5 μg pro g Hühnerhaut. Bei Schlachtgeflügel eignen sich Putrescin und Cadaverin gut als Leitsubstanzen für den einsetzenden Verderb, da sie bereits ab Gesamtkoloniezahlen von etwa 105 pro cm2 nachweisbar sind, und ihre Konzentration mit zunehmendem Verderb rasch ansteigen.
    Notes: Summary A simple high-performance liquid chromatographic (HPLC) analysis is described for the determination of biogenic amines in broiler carcasses. The clean-up procedure consists of an extraction with 0.6M-perchloric acid, formation of dansyl derivatives, separation by a RP-18 column and UV detection at 254 nm. Within 7 min eight amines could be separated. The quantitative determination of spermidine and spermine requires an additional ion-exchange clean-up with Amberlite CG 50 after the extraction. This procedure gives recoveries of 82%–96% with detection limits of 0.2–0.5 μg/g of broiler skin. Putrescine and cadaverine are good indicators for the onset of spoilage of poultry carcasses, since both amines could be detected at total colony counts of 105 cfu/cm2 and their concentration increases rapidly with advancing decomposition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01042622
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  • 7
    Electronic Resource
    Electronic Resource
    Gravimetric method for the determination of insoluble and soluble dietary fibres (1984)
    Springer
    European food research and technology 178 (1984), S. 195-198 
    Details
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Abstract The present paper describes a simple method for the determination of the insoluble and soluble dietary fibres in food. In a first step, starch and proteins are removed by enzyme treatment. The insoluble dietary fibres are determined gravimetrically after centrifugation and washing of the residue with water, ethanol, acetone and diethyl ether. The water-soluble dietary fibres are recovered from the supernatant liquid of the centrifugation by dialysis, freeze-drying, and subsequent weighing. The method has been used for the determination of dietary fibres in by-products from the industry.
    Notes: Zusammenfassung Die vorliegende Arbeit beschreibt eine einfache Methode zur Erfassung löslicher und unlöslicher Nahrungsfasern in Lebensmitteln. Zunächst werden Stärke und Proteine enzymatisch abgebaut. Die unlöslichen Nahrungsfasern werden nach Zentrifugation, Waschen des Rückstandes mit Wasser, Ethanol; Aceton und Diethylether und Trocknen zur Gewichtskonstanz gravimetrisch bestimmt. Die im Überstand der Zentrifugation sich befindenden löslichen Nahrungsfasern werden dialysiert, gefriergetrocknet und dann gewogen. Die Methode wurde an verschiedenen nahrungsfaserreichen Nebenprodukten der Lebensmittelindustrie angewendet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01043359
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  • 8
    Electronic Resource
    Electronic Resource
    Solvent Trapping during Large Volume Injection with an Early Vapor Exit, Part 2: Chromatographic Results and Conclusions (1998)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 21 (1998), S. 378-382 
    Details
    ISSN: 0935-6304
    Keywords: Large volume injection ; on-column injection ; flooded zone ; solvent trapping ; temperature measurement on precolumn wall ; water analysis ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: ---Solvent trapping reconcentrates volatile components after injection or on-line transfer of large volumes. When an early vapor exit is used, typically after a 5-10 m × 0.53 mm i.d. uncoated precolumn, the solvent trapping process differs from that described previously. The visual experiments and the conclusions drawn therefrom, as described in a previous paper, are supplemented with chromatographic results. They show that even hexane can be quantitatively analyzed in 250 μl of a pentane solution. Injection of a volume of 250 μl by vaporizer/precolumn solvent splitting was used in the analysis of gasoline in drinking water. Conditions for the transfer of a 1000 μl volume can easily be adjusted through detection of the front end of the flooded zone by a thermocouple mounted on the outer wall of the precolumn.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 9
    Electronic Resource
    Electronic Resource
    Dietary survey “HEUREKA” 1991: Dietary intake of a Swiss collective assessed by a self-administered 24-hour recall questionnaire (1996)
    Springer
    Sozial- und Präventivmedizin 41 (1996), S. 295-302 
    Details
    ISSN: 1420-911X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Der nach 10 Lebensmittelgruppen aufgeschlüsselte Lebensmittelverzehr sowie die Aufnahme an Energie und Hauptnährstoffen wurden für ein Schweizer Kollektiv (n=3653) im Alter von 7 jahren und mehr untersucht. Die Energie-Nährstoffrelation war im Vergleich zu früheren. Studien für alle 5 betrachteten Altersklassen günstiger. Kohlenhydrate haben als Energielieferanten an Bedeutung gewonnen. Alkohol verloren. Diese Resultate weisen auf ejnen positiven. Trend in den Ernährungsgewohnheiten des Kollektives hin, und deuten eine Verbesserung der Ernährungsgewohnheiten der Schweize Bevölkerung an.
    Abstract: Résumé La consommation alimentaire répartie sur 10 groupes d'aliments, l'apport énergétique et des nutriments principaux ontété étudiés pour un collectif Suisse (n=3653) agé 7 ans et plus. La part relative des nutriments dans la ration énergétique a été plus favorable pour toutes cing classes d'âge considerées par rapport aux études précédentes. Les glucides ont prit de l'importance et l'alcool a perdu de l'importance comme source d'énergie. Ces résultats indiquent une tendance positive des habitudes alimentaires du collectif et suggèrent une amélioration des habitudes alimentaires de toute la population suisse.
    Notes: Summary Food consumption (divided into 10 food groups) as well as energy and main nutrient intake of a Swiss collective (n=3653) aged 7 years and older was studied. The caloric density was much improved for all five age groups considered as compared with findings in former studies. Carbohydrates gained and alcohol lost significance as main energy suppliers. These results indicate a positive trend in the dietary habits of the collective and suggest an improvement in the dietary habits of the Swiss population as a whole.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01300435
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  • 10
    Electronic Resource
    Electronic Resource
    Capillary electrophoresis of ANTS labelled oligosaccharide ladders and complex carbohydrates (1994)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 350 (1994), S. 415-425 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The detection limits of the ANTS (8-aminonaphthalene-1,3,6-trisulfonic acid) label and ANTS maltose as a model carbohydrate conjugate were investigated with on-column UV and laser induced fluorescence detection. Under capillary electrophoresis conditions, the concentration and mass detection limits were found to be 5×10−7 mol/l or 8 femtomole with UV and 5×10−8 mol/l or 400 attomole with laser induced fluorescence detection, respectively. Including the derivatization reaction, the best concentration detection limit increases to 1×10−6 mol/l carbohydrate. A model calculation shows that these detection levels are still insufficient to match those of current protein sequencing protocols. Derivatization conditions for dextran and polygalacturonic acid ladders are described with subsequent fast separation in a capillary electrophoresis system under acidic pH buffer conditions. Up to 30 oligomers could be separated in less than 10 min. The application of ANTS labelled carbohydrate analysis in the food industry is demonstrated with the carbohydrate fraction of sweets and the kinetic monitoring of the hydrolysis of polygalacturonic acid. The described ANTS derivitization protocol works with as little as 5 μg carbohydrate as demonstrated with a complex oligosaccharide labelled in a reaction volume as little as 2 μl. To demonstrate the applicability of this approach to complex carbohydrate analysis, an oligosaccharide mixture derived from human Immunoglobuline G was labelled and separated within 5 min. Separation efficiency and speed are superior to state-of-the-art chromatographic methods. Both electrophoretic and chromatographic methods are complementary because of their different separation mechanism. The implications of using capillary electrophoresis with laser induced fluorescence and appropriate labelling strategies for structural and compositional analysis of complex carbohydrates are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00321784
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