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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">foodsyst</journal-id><journal-title-group><journal-title xml:lang="en">Food systems</journal-title><trans-title-group xml:lang="ru"><trans-title>Пищевые системы</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2618-9771</issn><issn pub-type="epub">2618-7272</issn><publisher><publisher-name>Федеральный научный центр пищевых систем им. В.М. Горбатова РАН</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21323/2618-9771-2024-7-2-305-311</article-id><article-id custom-type="elpub" pub-id-type="custom">foodsyst-493</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Effect of freezing temperature on rate of survival of lactococcus cultures during lyophilization</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние температуры замораживания на выживаемость культур лактококков при лиофилизации</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8251-992X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кучеренко</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kucherenko</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кучеренко Ирина Валентиновна — старший научный сотрудник, участок коллекции микроорганизмов и бактериофагов.</p><p>152613, Ярославская область, Углич, ул. Красноармейский бульвар, 19</p><p>Тел.: +7-485-329-82-21</p></bio><bio xml:lang="en"><p>Irina V. Kucherenko - Senior Researcher, Collection Area of Microorganisms and Bacteriophages, All-Russian Scientific Research Institute of Butter- and Cheesemaking.</p><p>19, Krasnoarmeysky Boulevard, Uglich, 152613, Yaroslavl Region</p><p>Tel.: +7-485-329-82-21</p></bio><email xlink:type="simple">i.kucherenko@fncps.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0710-3083</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кураева</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuraeva</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кураева Елена Вячеславовна — старший научный сотрудник, лаборатория селекции микроорганизмов.</p><p>152613, Ярославская область, Углич, ул. Красноармейский бульвар, 19</p><p>Тел.: +7-485-329-82-84</p></bio><bio xml:lang="en"><p>Elena V. Kuraeva - Senior Researcher, Microorganism Selection Laboratory, All-Russian Scientific Research Institute of Butter- and Cheesemaking.</p><p>19, Krasnoarmeysky Boulevard, Uglich, 152613, Yaroslavl Region</p><p>Tel.: +7-485-329-82-84</p></bio><email xlink:type="simple">e.kuraeva@fncps.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1381-9344</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Масежная</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Masegnaya</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Масежная Елена Сергеевна — младший научный сотрудник, участок коллекции микроорганизмов и бактериофагов.</p><p>152613, Ярославская область, Углич, ул. Красноармейский бульвар, 19</p><p>Тел.: +7485-329-82-21</p></bio><bio xml:lang="en"><p>Elena S. Masegnaya - Junior Researcher, Collection Area of Microorganisms and Bacteriophages, All-Russian Scientific Research Institute of Butter- and Cheesemaking.</p><p>19, Krasnoarmeysky Boulevard, Uglich, 152613, Yaroslavl Region</p><p>Tel.: +7-485-329-82-21</p></bio><email xlink:type="simple">mikrob.biofabrika@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт маслоделия и сыроделия</institution><country>Россия</country></aff><aff xml:lang="en"><institution>All-Russian Scientific Research Institute of Butter and Cheesemaking</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>17</day><month>07</month><year>2024</year></pub-date><volume>7</volume><issue>2</issue><fpage>305</fpage><lpage>311</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kucherenko I.V., Kuraeva E.V., Masegnaya E.S., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Кучеренко И.В., Кураева Е.В., Масежная Е.С.</copyright-holder><copyright-holder xml:lang="en">Kucherenko I.V., Kuraeva E.V., Masegnaya E.S.</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://www.fsjour.com/jour/article/view/493">https://www.fsjour.com/jour/article/view/493</self-uri><abstract><p>The important component in the activities of the collection of starter microorganisms is the preservation of the pool of the strains valuable for industrial production. Lyophilization (also known as freeze drying) is a widely used method for the long-term storage of the collection cultures. The critical parameter of the process of lyophilization is the pre-freezing temperature. This article brings forward the results of researches of the rate of survival of lactococcus strain cultures during their lyophilization with pre-freezing at the temperatures of minus 20 °C, minus 30 °C and minus 55 °C. Reconstituted 10% skim milk was used as the medium for strain culturing and lyophilization. Different reactions were detected among the microorganisms of Lactococcus lactis subsp. lactis, Lactococcus cremoris and Lactococcus lactis subsp. lactis biovar. diacetylactis for their freezing and lyophilization under the tested conditions. The highest rate of survival of lactococcus strains was observed at the freezing temperature of minus 20 °C. The most resistant cultures appeared to be Lactococcus lactis subsp. lactis biovar. diacetylactis — their rate of survival after lyophilization at minus 20 °C amounted to 42.6-57.9%. The lowest survival rate was recorded for Lactococcus cremoris in all freezing modes (from 3.1 to 15.7%). Lyophilization of lactococcus collection cultures ensures high survival rate of the cells.</p></abstract><trans-abstract xml:lang="ru"><p>Важной составляющей в деятельности коллекции заквасочных микроорганизмов является сохранение фонда производственно-ценных культур. Широко распространённым методом длительного хранения коллекционных культур является лиофилизация. Критическим параметром процесса лиофилизации является температура предварительного замораживания. В данной статье представлены результаты исследований выживаемости культур лактококков в процессе лиофилизации с предварительным замораживанием при температурах: минус 20 °C, минус 30 °C и минус 55 °C. Средой культивирования и лиофилизации являлось 10%-ное восстановленное обезжиренное молоко. Выявлена различная реакция микроорганизмов видов Lactococcus lactis subsp. lactis, Lactococcus cremoris и Lactococcus lactis subsp. lactis biovar. diacetylactis на замораживание и лиофильную сушку при испытанных режимах. Наиболее высокая выживаемость лактококков наблюдалась при температуре замораживания минус 20 °C. Самыми устойчивыми были культуры Lactococcus lactis subsp. lactis biovar. diacetylactis — выживаемость после сушки с замораживанием при температуре минус 20 °C составила 42,6-57,9%. Самая низкая выживаемость характерна для Lactococcus cremoris при всех режимах замораживания (от 3,1 до 15,7%). Лиофилизация коллекционных культур лактококков позволяет обеспечить высокую выживаемость клеток.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>лактококки</kwd><kwd>замораживание</kwd><kwd>лиофилизация</kwd><kwd>выживаемость</kwd><kwd>хранение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>lactococcus</kwd><kwd>freezing</kwd><kwd>lyophilization</kwd><kwd>survival</kwd><kwd>storage</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Статья подготовлена в рамках выполнения исследований по государственному заданию № FRFF-2023-0001 Федерального научного центра пищевых систем им. В.М. Горбатова Российской академии наук.</funding-statement><funding-statement xml:lang="en">The article was prepared as part of research on state task No. FRFF-2023-0001 of the V.M. 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