Differences in ratio of carbon stable Isotopes among barley grain milling fractions with various concentrations of beta-glucans

Levanič, Tom (author), Cigić, Blaž (author), Germ, Mateja (author), Polišenská, Ivana (author), Vaculová, Kateřina (author), Pravst, Igor (author), Kocjan Ačko, Darja (author), Kreft, Ivan (author)

The grains of three barley varieties were milled and sieved to obtain respective milling fractions with a content of beta-glucans (b-G) from 1.4 to 10.7%. The enriched fraction obtained by the extraction and precipitation contained 24.7% of b-G. The differences between the ratio of stable C carbon isotopes were established. Milling fractions with coarse particles had more beta-glucans and a more negative ratio of δ 13C isotope in comparison to the respective intact barley grain. However, the enriched fraction had a less negative isotope ratio. So, it is not expected that the deviation from the stable isotope ratio of grain in milling fractions is the result of the content of b-G, but it depends on other barley grain constituents. In different parts of barley grain, there are substances with different stable isotope ratios, and by milling and sieving, they are assorted to the same milling fraction with most of the b-G. The method for determining the ratio of a stable carbon isotope in diverse barley grain fractions, applied in this investigation, is potentially opening the possibility for an additional method of screening the concentration of bioactive constituents in barley grain.

• Language: English
• Keywords: beta-glucans, starch, barley, stable isotopes, nutrition, milling
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Publication date: 01.01.2023
• Year: 2023
• Number of pages: Str. 1-8
• Numbering: Vol. 28, article no. ǂ5738
• PID: 20.500.12556/RUL-148217
• UDC: 577.2
• ISSN on article: 1420-3049
• DOI: 10.3390/molecules28155738
• COBISS.SI-ID: 160452867
• Publication date in RUL: 02.08.2023

Record is a part of a journal

• Title: Molecules
• Shortened title: Molecules
• Publisher: MDPI
• ISSN: 1420-3049
• COBISS.SI-ID: 18462981

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: beta-glukani, škrob, ječmen, stabilni izotopi, prehrana, rezkanje