Життєздатність Bifidobacterium bifidum 1 за впливу гіпотермії, одноразового та повторних циклів заморожування-відтавання
Abstract: The viability of bacteria of the Bifidobacterium bifidum 1 probiotic strain under hypothermia, single and repeated freeze-thaw cycles (thermal cycling) was studied. Samples of bifidobacterial suspensions were frozen immediately after isolation or after daily hypothermic storage in three...
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| Datum: | 2020 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Publishing House ‘Akademperiodyka’ of the National Academy of Sciences of Ukraine; Institute for Problems of Cryobiology and Cryomedicine
2020
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| Schlagworte: | |
| Online Zugang: | https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1644 |
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| Назва журналу: | Problems of Cryobiology and Cryomedicine |
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Problems of Cryobiology and Cryomedicine| Zusammenfassung: | Abstract: The viability of bacteria of the Bifidobacterium bifidum 1 probiotic strain under hypothermia, single and repeated freeze-thaw cycles (thermal cycling) was studied. Samples of bifidobacterial suspensions were frozen immediately after isolation or after daily hypothermic storage in three ways to the final temperature of either (–23 ± 1) or (–196 ± 1)ºC. After slow freezing of the samples down to (–23 ± 1) ºC bigger quantitative losses of bifidobacteria were observed if compared with those after rapid freezing by a direct immersion into liquid nitrogen. Storage of the samples under hypothermia and a single freeze-thaw was accompanied with a strong inhibition of the daily growth of bifidobacteria biomass and an increased formation of biofilms. Ten-fold thermal cycling in the most unfavorable way for survival did not lead to the death of all cells in suspensions. Up to 35% of bifidobacteria remained viable. Indices of the bifidobacteria ability to enhance biomass remained at the level of 35%, and the ability to form biofilm was kept at the level of 43.7–65.5% of the corresponding indices for freshly isolated cells.
Probl Cryobiol Cryomed 2020; 30(3): 247–255 |
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