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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1446</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>АННОТАЦИИ АНГЛОЯЗЫЧНЫХ СТАТЕЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ABSTRACTS ENGLISH-LANGUAGE ARTICLES</subject></subj-group></article-categories><title-group><article-title>“Зеленый” синтез наночастиц диоксида титана с использованием спиртового экстракта зеленого чая и их антиоксидантные свойства</article-title><trans-title-group xml:lang="en"><trans-title>Green Synthesis of Titanium Dioxide Nanoparticles Using Ethanolic Extract of Green Tea and Their Antioxidant Activities</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>Saad</surname><given-names>А. F.</given-names></name><name name-style="western" xml:lang="en"><surname>Saad</surname><given-names>A. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Загазиг</p></bio><bio xml:lang="en"><p>Zagazig</p></bio><email xlink:type="simple">mohammed.elywa@zu.edu.eg</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>Selim</surname><given-names>Y. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Selim</surname><given-names>Yasser A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Загазиг</p></bio><bio xml:lang="en"><p>Yasser A. Selim</p><p>Zagazig</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>Hamada</surname><given-names>М.</given-names></name><name name-style="western" xml:lang="en"><surname>Hamada</surname><given-names>Mona</given-names></name></name-alternatives><bio xml:lang="ru"><p>Загазиг</p></bio><bio xml:lang="en"><p>Mona Hamada</p><p>Zagazig</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>Elywa</surname><given-names>М.</given-names></name><name name-style="western" xml:lang="en"><surname>Elywa</surname><given-names>Mohammed</given-names></name></name-alternatives><bio xml:lang="ru"><p>Загазиг</p></bio><bio xml:lang="en"><p>Zagazig</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Университет Загазига</institution></aff><aff xml:lang="en"><institution>Zagazig University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>26</day><month>11</month><year>2023</year></pub-date><volume>90</volume><issue>5</issue><fpage>810</fpage><lpage>810</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Saad А.F., Selim Y.А., Hamada М., Elywa М., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Saad А.F., Selim Y.А., Hamada М., Elywa М.</copyright-holder><copyright-holder xml:lang="en">Saad A.F., Selim Y.A., Hamada M., Elywa M.</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://zhps.ejournal.by/jour/article/view/1446">https://zhps.ejournal.by/jour/article/view/1446</self-uri><abstract><p>Наночастицы диоксида титана (НЧ TiO2) получены методом “зеленого” синтеза из экстракта листьев зеленого чая. Растения высушивали в течение семи дней при комнатной температуре и измельчали в мелкий порошок, после чего выполняли химический анализ методом ВЭЖХ. Синтез НЧ TiO2 подтвержден с помощью УФ-видимой спектроскопии, ИК-Фурье-спектроскопии (FTIR), рентгеновской дифракции (XRD) и просвечивающей электронной микроскопии высокого разрешения (HRTEM). Показано, что экстракт зеленого чая содержит полифенолы и флавоноиды, ответственные за его биологическую активность. Исследование ВЭЖХ указывает на наличие галловой кислоты, протокатеховой, п-гидроксибензойной, кофеиновой кислоты, катехина, хлорогеновой кислоты, рутина, кумаровой кислоты, галлата эпикатехина, апигенин-7-глюкозида, феруловой кислоты, хризина, кверцетина и коричной кислоты. Скрининг антиоксидантов in vitro показал, что поглощающий эффект экстракта зеленого чая ингибируется на 50% (IC50) при уровне концентрации 19.64±0.13 мкг/мл, в то время как стандарт — витамин C концентрации 16.81±0.10 мкг/мл. Однако в случае модели ABTS поглощающий эффект экстракта зеленого чая ингибируется на 50% (IC50) при концентрации 33.47±0.21 мкг/мл, тогда как стандарт — витамин C концентрации 29.47±0.17 мкг/мл. Результаты подтверждают, что зеленый чай является отличным антиоксидантом.</p></abstract><trans-abstract xml:lang="en"><p>The aim of this work is to prepare and study titanium dioxide nanoparticles (TiO2 NPs) that were formed from the leaf extract of green tea using the green synthesis method. Plants were dried for seven days at room temperature and finely ground into a fine powder, after which chemical composition, HPLC analysis, characterization of TiO2 NPs, and biological evaluation processes were performed. In addition, TiO2 NPs synthesis was confirmed using UV-visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and high-resolution-transmission electron microscope (HR-TEM). A close analysis indicates that the green tea extract contained polyphenols and flavonoids at varied levels, which may be responsible for its biological activities. HPLC examination indicates the presence of Gallic acid, Protocatechuic, p-hydroxybenzoic, Caffeine acid, Catechin, chlorogenic, rutin, coumaric acid, epicatechin gallate, apigenin-7-glucoside, ferulic acid, chrysin, quercetin, and cinnamic acid, might be responsible for their therapeutic potential. In vitro, antioxidant screening revealed that the scavenging effect of green tea extract has 50% inhibition (IC50) at a concentration level of 19.64±0.13 μg/mL, whereas standard Vit. C showed that at 16.81±0.10 μg/mL. However, in the case of the ABTS model, the scavenging effect of green tea extract has 50% inhibition (IC50) at a concentration level of 33.47±0.21 μg/mL, whereas standard Vit. C showed the same at 29.47±0.17 μg/mL. These results demonstrate that green tea is an excellent antioxidant (i.e., an effective anti-DPPH compound).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>зеленый чай</kwd><kwd>наночастицы TiO2</kwd><kwd>ВЭЖХ</kwd><kwd>сумма фенолов</kwd><kwd>антиоксидантная активность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>green tea</kwd><kwd>TiO2 NPs</kwd><kwd>HPLC</kwd><kwd>total phenolics</kwd><kwd>antioxidant activity</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">P. Costantini, E. Jacotot, D. Decaudin, G. Kroemer, J. Natl. Cancer Inst., 92, No. 13, 1042–1053 (2000).</mixed-citation><mixed-citation xml:lang="en">P. Costantini, E. Jacotot, D. Decaudin, G. Kroemer, J. Natl. Cancer Inst., 92, No. 13, 1042–1053 (2000).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Y. Q. Liu, G. V. 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