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  • 1
    Publication Date: 2022-10-07
    Description: The search for new effective structure-forming agents of natural origin in order to improve the technology of fish molded products is an urgent scientific and industrial problem. In the course of the study, to obtain minced fish systems, frozen pollock and pink salmon have been used that meet the technical requirements of the current regulatory documentation. Mixtures of cryoconcentrates from seafood, rice and wheat flour, and the enzyme transglutaminase are used as structure-regulating additives. Cryoconcentrates have been made from cucumaria, squid, Pacific herring milt, octopus skin, seaweed, and scallop mantle. The introduction of dry powdered cryoconcentrates of seafood, containing a significant amount of protein substances, has contributed to the binding of water and an increase in the water-retaining capacity of minced pink salmon and pollock. Based on the results of studying the physical, chemical, rheological and organoleptic properties of dispersed minced fish systems, rational amounts of structure-regulating additives have been established: seafood cryoconcentrates – 4.0–5.0 %; transglutaminase – 0.5 %; rice flour – 2.0 %; wheat flour – 1.0–2.0 %. Molded fish products (cutlets, sausages) containing structure-regulating additives had high organoleptic properties after heat treatment. The results of the research should be used in the development of formulations of fish dispersed compositions in the technologies of molded, emulsion and structured products. The established high water-binding capacity of seafood cryoconcentrates justifies the need to study them as natural cryoprotectors in refrigeration technologies.
    Description: Поиск новых эффективных структурообразователей природного происхождения с целью совершенствования технологии рыбных формованных продуктов является актуальной научной и производственной проблемой. В ходе исследования для получения рыбных фаршевых систем использовались мороженые минтай и горбуша, соответствующие по техническим требованиям действующей нормативной документации. В качестве структурорегулирующих добавок применялись смеси криоконцентратов из морепродуктов, мука рисовая и пшеничная, фермент трансглутаминаза. Криоконцентраты изготавливались из кукумарии, кальмара, молок сельди тихоокеанской, кожи осьминога, морской капусты, мантии гребешка. Внесение сухих порошкообразных криоконцентратов морепродуктов, содержащих значительное количество белковых веществ, способствовало связыванию воды и повышению водоудерживающей способности фарша горбуши и минтая. На основании результатов исследования физических, химических, реологических и органолептических свойств дисперсных рыбных фаршевых систем установлены рациональные количества вносимых структурорегулирующих добавок: криоконцентратов морепродуктов – 4,0–5,0 %; трансглутаминазы – 0,5 %; рисовой муки – 2,0 %; пшеничной муки – 1,0–2,0 %. Формованные рыбные изделия (котлеты, сосиски), содержащие структурорегулирующие добавки, после термической обработки имели высокие показатели органолептических свойств. Результаты исследований целесообразно использовать при разработке рецептур рыбных дисперсных композиций в технологиях формованных, эмульсионных и структурированных продуктов. Установленная высокая водосвязывающая способность криоконцентратов морепродуктов обосновывает необходимость их исследования как природных криопротекторов в холодильных технологиях.
    Description: Published
    Description: Refereed
    Keywords: Minced fish ; Molded product ; Рыбный фарш ; Формованный продукт ; ASFA_2015::F::Fishery technology ; ASFA_2015::O::Organoleptic properties
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.219-230
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  • 2
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    AMER SOC LIMNOLOGY OCEANOGRAPHY
    In:  EPIC3Limnology and Oceanography-Methods, AMER SOC LIMNOLOGY OCEANOGRAPHY, 19, pp. 356-367, ISSN: 1541-5856
    Publication Date: 2022-09-20
    Description: The precise determination of radium-226 (226Ra) in environmental samples is challenging due to its low con- centration. Seawater typically contains between 0.03 and 0.1 fg g−1 226Ra. Thus, this work addresses the need for an easy and precise methodology for 226Ra determination in seawater that may be applied routinely to a large number of samples. For this reason, a new analytical approach has been developed for the quantification of 226Ra in seawater via inductively coupled plasma mass spectrometry (ICP-MS). Analysis by single collector sector-field ICP-MS was shown to be convenient and reliable for this purpose once potential molecular interfer- ences were excluded by a combination of chemical separation and intermediate mass resolution analysis. The proposed method allows purification of Ra from the sample matrix based on preconcentration by MnO2 precipi- tation, followed by two-column separation using a cation exchange resin and an extraction chromatographic resin. The method can be applied to acidified and unacidified seawater samples. The recovery efficiency for Ra ranged between 90% and 99.8%, with precision of 5%, accuracy of 95.7% to 99.9%, and a detection limit of 0.033 fg g−1 (referring to the original concentration of seawater). The method has been applied to measure 226Ra concentrations from the North Sea and validated by analyzing samples from the central Arctic (GEOTRACES GN04). Samples from a crossover station (from GEOTRACES GN04 and GEOTRACES GN01 research cruises) were analyzed using alternative methods, and our results are in good agreement with published values.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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