https://wiki.tiffa.net/w/index.php?action=history&feed=atom&title=Translations%3ABifidobacterium%2F7%2Fen 2026-09-11T16:15:28Z Revision history for this page on the wiki MediaWiki 1.43.0 https://wiki.tiffa.net/w/index.php?title=Translations:Bifidobacterium/7/en&diff=140672&oldid=prev 2024-04-18T00:43:44Z

<p>Importing a new version from external source</p> <p><b>New page</b></p><div>==Response to oxygen==<br /> The sensitivity of members of the genus &#039;&#039;Bifidobacterium&#039;&#039; to O&lt;sub&gt;2&lt;/sub&gt; generally limits probiotic activity to anaerobic habitats. Recent research has reported that some &#039;&#039;Bifidobacterium&#039;&#039; strains exhibit various types of [[wikt:oxic|oxic]] growth. Low concentrations of O&lt;sub&gt;2&lt;/sub&gt; and CO&lt;sub&gt;2&lt;/sub&gt; can have a stimulatory effect on the growth of these &#039;&#039;Bifidobacterium&#039;&#039; strains. Based on the growth profiles under different O&lt;sub&gt;2&lt;/sub&gt; concentrations, the &#039;&#039;Bifidobacterium&#039;&#039; species were classified into four classes: O&lt;sub&gt;2&lt;/sub&gt;-hypersensitive, O&lt;sub&gt;2&lt;/sub&gt;-sensitive, O&lt;sub&gt;2&lt;/sub&gt;-tolerant, and [[microaerophilic]]. The primary factor responsible for aerobic growth inhibition is proposed to be the production of [[hydrogen peroxide]] (H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt;) in the growth medium. A H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt;-forming [[NADH]] [[oxidase]] was purified from O&lt;sub&gt;2&lt;/sub&gt;-sensitive &#039;&#039;Bifidobacterium bifidum&#039;&#039; and was identified as a &#039;&#039;b&#039;&#039;-type [[dihydroorotate dehydrogenase]]. The kinetic parameters suggested that the enzyme could be involved in H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; production in highly aerated environments.</div>

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