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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">meatmilk</journal-id><journal-title-group><journal-title xml:lang="ru">Актуальные вопросы переработки мясного и молочного сырья</journal-title><trans-title-group xml:lang="en"><trans-title>Topical Issues of Processing of Meat and Milk Raw Materials</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8755</issn><publisher><publisher-name>Институт системных исследований в АПК Национальной академии наук Беларуси</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">meatmilk-494</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>БИОТЕХНОЛОГИЯ</subject></subj-group></article-categories><title-group><article-title>ПОСТОКИСЛИТЕЛЬНАЯ АКТИВНОСТЬ ЗАКВАСОЧНЫХ КУЛЬТУР ЛАКТОКОККОВ И ТЕРМОФИЛЬНОГО СТРЕПТОКОККА</article-title><trans-title-group xml:lang="en"><trans-title>POST-ACIDIFICATION ACTIVITY OF STARTER CULTURES OF LACTOCOCCUS AND STREPTOCOCCUS THERMOPHILUS</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бирюк</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Biruk</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.с-х.н., </p><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жабанос</surname><given-names>Н. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhabanos</surname><given-names>N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., доцент,</p><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Трафимова</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Trafimova</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Савельева</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Savelyeva</surname><given-names>T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.в.н., доцент,</p><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт мясо-молочной промышленности</institution></aff><aff xml:lang="en"><institution>Institute for Meat and Dairy Industry</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>26</day><month>02</month><year>2026</year></pub-date><volume>0</volume><issue>19</issue><fpage>100</fpage><lpage>109</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бирюк Е.Н., Жабанос Н.К., Трафимова А.Г., Савельева Т.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Бирюк Е.Н., Жабанос Н.К., Трафимова А.Г., Савельева Т.А.</copyright-holder><copyright-holder xml:lang="en">Biruk A., Zhabanos N., Trafimova A., Savelyeva T.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://meatmilk.belal.by/jour/article/view/494">https://meatmilk.belal.by/jour/article/view/494</self-uri><abstract><p>Проведены исследования по изучению изменений активной кислотности в образцах молока, ферментированного штаммами лактококков и термофильного стрептококка при различных режимах хранения (+4оС, +8оС и +12оС). Установлено, что критической температурой хранения является температура +12оС, при которой активная кислотность снижалась до значения 4,4 ед. рН и ниже во всех исследованных образцах на 7 сутки хранения. Не выявлено достоверной зависимости снижения активной кислотности в образцах молока, ферментированных культурами термофильного стрептококка с разным сахаролитическим профилем.</p></abstract><trans-abstract xml:lang="en"><p>Studies were conducted to investigate changes in active acidity (pH) in milk samples fermented with strains of Lactococcus and Streptococcus thermophilus under different storage temperature regimes (+4°C, +8°C, and +12°C). It was established that +12°C represents a critical storage temperature, at which the active acidity decreased to pH 4.4 and below in all examined samples by the 7th day of storage. No statistically significant relationship was found between the decrease in active acidity and the saccharolytic profile of Streptococcus thermophilus cultures used for milk fermentation.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Lactococcus lactis ssp.</kwd><kwd>Streptococcus salivarius subsp. thermophilus</kwd><kwd>активная кислотность</kwd><kwd>рН</kwd><kwd>постокисление</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Lactococcus lactis ssp.</kwd><kwd>Streptococcus salivarius subsp. thermophilus</kwd><kwd>active acidity</kwd><kwd>pH</kwd><kwd>post-acidification</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Review on factors affecting and control of post-acidification in yoghurt and related products / G. K. Deshwal, S. Tiwari, A. 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