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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">pmj</journal-id><journal-title-group><journal-title xml:lang="ru">Тихоокеанский медицинский журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Pacific Medical Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1609-1175</issn><publisher><publisher-name>TGMU</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.34215/1609-1175-2025-4-79-85</article-id><article-id custom-type="elpub" pub-id-type="custom">pmj-3025</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>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL RESEARCHES</subject></subj-group></article-categories><title-group><article-title>Оптимизация метода Фолина – Чокальтеу для определения фенольных антиоксидантов в побегах боярышника перистонадрезанного (Crataegus pinnatifida)</article-title><trans-title-group xml:lang="en"><trans-title>Optimization of the Folin–Ciocalteu method for measuring phenolic antioxidants in the shoots of Crataegus pinnatifida Bunge</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>Мечикова</surname><given-names>Г. Я.</given-names></name><name name-style="western" xml:lang="en"><surname>Mechikova</surname><given-names>G. Ya.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мечикова Галина Ярославовна – доцент кафедры фармации и фармакологии</p><p>680000, Хабаровск, ул. МуравьеваАмурского, 35</p></bio><bio xml:lang="en"><p>Galina Ya. Mechikova, Associate Prof. of Dep. of Pharmacy and Pharmacology</p><p>35 Muravyov-Amursky str., Khabarovsk, 680000, Russia</p></bio><email xlink:type="simple">galina.m.ya@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Матющенко</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Matyushchenko</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p> Хабаровск </p></bio><bio xml:lang="en"><p>Khabarovsk</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>Слободенюк</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Slobodenyuk</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хабаровск</p></bio><bio xml:lang="en"><p>Khabarovsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Дальневосточный государственный медицинский университет (ДВГМУ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Far Eastern State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>15</day><month>02</month><year>2026</year></pub-date><volume>0</volume><issue>4</issue><fpage>79</fpage><lpage>85</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мечикова Г.Я., Матющенко Н.В., Слободенюк Е.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Мечикова Г.Я., Матющенко Н.В., Слободенюк Е.В.</copyright-holder><copyright-holder xml:lang="en">Mechikova G.Y., Matyushchenko N.V., Slobodenyuk E.V.</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.tmj-vgmu.ru/jour/article/view/3025">https://www.tmj-vgmu.ru/jour/article/view/3025</self-uri><abstract><p>Цель: оптимизация метода Фолина – Чокальтеу (ФЧ) для определения фенольных антиоксидантов в побегах боярышника перистонадрезанного (Crataegus pinnatifida) с привлечением методологии поверхностного отклика и плана Бокса – Бенкена. Материалы и методы. Побеги боярышника перистонадрезанного заготавливали в 2025 году в фазу начала цветения в естественной природной популяции на территории Хабаровского края. Работу выполняли на спектрофотометре UV-1700, Shimadzu (Япония). Для поиска комбинации уровней факторов экстракции фенольных соединений, обеспечивающей оптимальный отклик, был использован инструмент поверхностного отклика и план Бокса – Бенкена. Статистическую обработку результатов проводили в соответствии с ГФ XV издания ОФС.1.1.0013 «Статистическая обработка результатов физических, физико-химических и химических испытаний» с помощью пакетов прикладных компьютерных программ Microsoft Office Excel 2010 и Statistica 6.0. Результаты. В побегах боярышника перистонадрезанного определены оптимальные параметры реакции ФЧ – 0,5 мл реактива ФЧ и 5 мл 20% раствора натрия карбоната, обеспечивающие точность, воспроизводимость и стабильность продуктов реакции. Методология поверхностного отклика и план Бокса – Бенкена позволили установить, что максимальный выход фенольных соединений достигается при комбинации параметров экстракции: экстрагент – спирт этиловый 54,87%; соотношение массы сырья к объему экстрагента – 1:783, время экстракции – 65,99 мин. Заключение. Оптимизированы условия экстракции и разработана методика количественного спектрофотометрического определения фенольных соединений в побегах боярышника перистонадрезанного, которая необходима для стандартизации данного вида сырья.</p></abstract><trans-abstract xml:lang="en"><p>Objective. To optimize the Folin–Ciocalteu (FC) method for estimating phenolic antioxidants in the shoots of Crataegus pinnatifida Bunge using surface response methodology and the Box–Behnken design. Materials and methods. The shoots of Crataegus pinnatifida Bunge were harvested in 2025 at the beginning of flowering from a natural population in Khabarovsk Krai. The measurements were performed using a UV-1700 spectrophotometer (Shimadzu, Japan). The response surface tool and the Box–Behnken design were applied to identify the combination of phenolic compound extraction factor levels that would yield the optimal response. Statistical processing of the results was carried out in accordance with the State Pharmacopoeia of the Russian Federation, 15th edition, OFS.1.1.0013 “Statistical processing of the results of physical, physicochemical, and chemical tests” using the Microsoft Office Excel 2010 and Statistica 6.0 software packages. Results. For the shoots of Crataegus pinnatifida Bunge, the optimal parameters for the FC reaction have been determined as 0.5 ml of FC reagent and 5 ml of a 20% sodium carbonate solution, which ensure the accuracy, reproducibility, and stability of the reaction products. The response surface methodology and Box–Behnken design revealed that the highest yield of phenolic compounds occurs when the following extraction parameters are combined: extractant is 54.87% ethyl alcohol; raw material to extractant mass ratio is 1:783, and extraction time is 65.99 min. Conclusion. Extraction conditions are optimized; a method for quantitative spectrophotometric determination of phenolic compounds in the shoots of Crataegus pinnatifida Bunge is developed, which is necessary for standardization of this type of raw material.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>боярышник перистонадрезанный</kwd><kwd>фенольные соединения</kwd><kwd>метод Фолина – Чокальтеу</kwd><kwd>планы Бокса – Бенкена</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Crataegus pinnatifida Bunge</kwd><kwd>phenolic compounds</kwd><kwd>Folin–Ciocalteu method</kwd><kwd>Box–Behnken plots</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">научное исследование выполнено при финансовой поддержке государственного задания по теме «Изучение перспективных фитокомплексов из лекарственных растений Дальнего Востока и разработка на их основе биологически активных добавок и лекарственных средств».</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">Asfaw DE. 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