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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">10.21323/2618-9771-2023-6-4-512-518</article-id><article-id custom-type="elpub" pub-id-type="custom">foodsyst-343</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>Peculiarities of development and metabolism of Streptococcus thermophilus strains under different conditions of deep liquid phase cultivation</article-title><trans-title-group xml:lang="ru"><trans-title>Особенности развития и метаболизма штаммов Streptococcus thermophilus в разных условиях глубинного жидкофазного культивирования</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9586-3786</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Свириденко</surname><given-names>Г. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Sviridenko</surname><given-names>G. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Свириденко Галина Михайловна — доктор  технических наук, главный научный сотрудник,  руководитель направления микробиологических исследований молока и молочных продуктов</p><p>152613, Ярославская область, Углич, Красноармейский бульвар, 19 Teл.: +7–485–325–48–64</p></bio><bio xml:lang="en"><p>Galina M. Sviridenko, Doctor of Technical Sciences, Leading Researcher, Head of Research Department of Microbiology</p><p>19, Krasnoarmeysky Boulevard, Uglich, 152613, Yaroslavl  Region, Tel.: +7–485–325–48–64</p></bio><email xlink:type="simple">g.sviridenko@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/0000-0002-7665-8517</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шухалова</surname><given-names>О. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Shukhalova</surname><given-names>O. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шухалова Ольга Михайловна — младший научный сотрудник, отдел микробиологии</p><p>152613, Ярославская область, Углич,  Красноармейский бульвар, 19 Teл.: +7–485–329–81–52</p></bio><bio xml:lang="en"><p>Olga M. Shukhalova, Junior Researcher, Department of Microbiology</p><p>19, Krasnoarmeysky Boulevard, Uglich, 152613, Yaroslavl  Region, Tel.: +7–485–329–81–52</p></bio><email xlink:type="simple">o.shukhalova@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/0000-0001-5522-224X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Данилова</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Danilova</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Данилова Екатерина Сергеевна — научный  сотрудник, отдел маслоделия</p><p>152613, Ярославская обл., Углич, Красноармейский бульвар, 19 Тел.: +7–960–527–61–48</p></bio><bio xml:lang="en"><p>Ekaterina S. Danilova, Researcher, Buttermaking Department</p><p>19, Krasnoarmeysky Boulevard, Uglich, 152613, Yaroslavl  Region, Tel.: +7–960–527–61–48</p></bio><email xlink:type="simple">e.danilova@fncps.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>2023</year></pub-date><pub-date pub-type="epub"><day>14</day><month>01</month><year>2024</year></pub-date><volume>6</volume><issue>4</issue><fpage>512</fpage><lpage>518</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Sviridenko G.M., Shukhalova O.M., Danilova E.S., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Свириденко Г.М., Шухалова О.М., Данилова Е.С.</copyright-holder><copyright-holder xml:lang="en">Sviridenko G.M., Shukhalova O.M., Danilova 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/343">https://www.fsjour.com/jour/article/view/343</self-uri><abstract><p>The microflora of most fermented dairy products, including cheeses, consists entirely of lactic acid bacteria, i. e., bacterial starter cultures with different species and strain composition that are specially introduced into the mixture. The species composition of the starter must ensure the intensity and direction of the microbiological and biochemical processes of the produced product and guarantee its safety, quality and storability. In particular, lactic acid bacteria transform the main components of milk (protein, milk fat, lactose) into taste, aromatic, and biologically active substances involved in the formation of identification and organoleptic characteristics of fermented dairy products. The number of starter microorganisms in fermented dairy products, including cheeses, significantly exceeds the content of any foreign microflora and can cause the appearance of organoleptic defects such as acid, bitterness, non-specific off-taste or excessive gas formation. The ability of microorganisms to form certain metabolic products is determined both by their species and strain properties, and by cultivation conditions. These include, first of all, the composition of the development environment and temperature conditions of cultivation. By combining the composition of the starter and selecting favorable modes for cultivating microorganisms, it is possible to achieve optimal development of the starter microflora, obtaining products with the desired quality characteristics. This article presents the results of a comparative assessment of the properties of production strains of Streptococcus thermophilus during their development in dairy environments at optimal temperatures (41 ± 1) °C, simulating conditions for the production of fermented milk products, as well as in modes simulating cheese ripening conditions (11 ± 1) °C and 4% table salt concentration. The nature of the enzymatic processes of glycolysis, proteolysis, lipolysis, and flavor formation as a result of the metabolism of these cultures was also assessed.</p></abstract><trans-abstract xml:lang="ru"><p>Микрофлора большинства ферментируемых молочных продуктов, в том числе сыров, полностью состоит из молочнокислых бактерий, т. е. специально вносимых в смесь бактериальных заквасок с различным видовым и штаммовым составом. Видовой состав закваски должен обеспечить интенсивность и направленность микробиологических и биохимических процессов вырабатываемого продукта и гарантировать его безопасность, качество и хранимоспособность. В частности, молочнокислые бактерии осуществляют преобразование основных компонентов молока (белка, молочного жира, лактозы) во вкусовые, ароматические, биологически активные вещества, участвующие в формировании идентификационных и органолептических показателей ферментируемых молочных продуктов. Количество заквасочных микроорганизмов в ферментируемых молочных продуктах, в том числе и сырах, значительно превышает содержание любой посторонней микрофлоры и может стать причиной появления таких органолептических пороков, как кислота, горечь, неспецифический посторонний привкус или избыточное газообразование. Способность микроорганизмов к образованию тех или иных продуктов метаболизма определяется как их видовыми и штаммовыми свойствами, так и условиями культивирования. К таковым относятся, прежде всего, состав среды развития и температурные режимы культивирования. Комбинируя состав закваски и подбирая благоприятные режимы культивирования микроорганизмов, можно добиться оптимального развития заквасочной микрофлоры, получив продукты с искомыми качественными характеристиками. В данной статье представлены результаты сравнительной оценки свойств производственных штаммов Streptococcus thermophilus в процессе их развития в молочных средах при оптимальных температурах (41±1)°C, имитирующих условия производства кисломолочных продуктов, а также в режимах, имитирующих условия созревания сыров (11±1)°C и концентрации поваренной соли 4%. Также проводилась оценка характера ферментативных процессов гликолиза, протеолиза, липолиза и вкусообразования в результате метаболизма данных культур.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>модельные молочные среды</kwd><kwd>штаммы Streptococcus thermophilus</kwd><kwd>количество клеток</kwd><kwd>кислотообразующая активность</kwd><kwd>гликолиз</kwd><kwd>протеолиз</kwd><kwd>липолиз</kwd><kwd>образование вкусоароматических веществ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>model dairy media</kwd><kwd>strains of Streptococcus thermophiles</kwd><kwd>cell number</kwd><kwd>acid-forming activity</kwd><kwd>glycolysis</kwd><kwd>proteolysis</kwd><kwd>lipolysis</kwd><kwd>formation of flavoring substances</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Статья подготовлена в рамках выполнения исследований по государственному заданию № FNEN-2019-0010 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 the research under the state assignment No. FNEN-2019–0010 of the V. M. Gorbatov Federal Research Center for Food Systems of the Russian Academy of Sciences.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Перфильев, Г. Д., Свириденко, Ю. Я. (2006). Производство и применение бактериальных концентратов. Сыроделие и маслоделие, 3, 24–29.</mixed-citation><mixed-citation xml:lang="en">Perfil’ev, G. D., Sviridenko, Yu. Ya. (2006). Production and applications of bacteriological concentrates. Cheesemaking and Buttermaking, 3, 24–29. (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Wedajo, B. (2015). 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