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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">vuzbiochemi</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Прикладная химия и биотехнология</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of Universities. Applied Chemistry and Biotechnology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2227-2925</issn><issn pub-type="epub">2500-1558</issn><publisher><publisher-name>ИРНИТУ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21285/2227-2925-2023-13-2-220-227</article-id><article-id custom-type="edn" pub-id-type="custom">LDTIEC</article-id><article-id custom-type="elpub" pub-id-type="custom">vuzbiochemi-1016</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>ФИЗИКО-ХИМИЧЕСКАЯ БИОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICOCHEMICAL BIOLOGY</subject></subj-group></article-categories><title-group><article-title>Неорганические компоненты стеблей подсолнечника</article-title><trans-title-group xml:lang="en"><trans-title>Inorganic compounds of sunflower stems</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7179-2736</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ковехова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kovekhova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ковехова Анна Васильевна - кандидат химических наук, доцент, Дальневосточный федеральный университет; научный сотрудник, Институт химии ДВО РАН.</p><p>690922, г. Владивосток, о. Русский, п. Аякс, 10; 690022, Владивосток, пр-т 100-летия Владивостока, 159</p></bio><bio xml:lang="en"><p>Anna V. Kovekhova - Cand. Sci. (Chemistry), Associate Professor, Far Eastern Federal University; Researcher, Institute of Chemistry FEB RAS.</p><p>10, Ajax Bay, Russky Island, Vladivostok, 690922; 159, Stoletiya Vladivostoka Ave., Vladivostok, 690022</p></bio><email xlink:type="simple">kovekhova.av@dvfu.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/0000-0001-8001-4370</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Арефьева</surname><given-names>О. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Arefieva</surname><given-names>O. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Арефьева Ольга Дмитриевна - доктор химических наук, доцент, Дальневосточный федеральный университет; научный сотрудник, Институт химии ДВО РАН.</p><p>690922, Владивосток, о. Русский, п. Аякс, 10; 690022, Владивосток, пр-т 100-летия Владивостока, 159</p></bio><bio xml:lang="en"><p>Olga D. Arefieva - Cand. Sci. (Pedagogy), Associate Professor, Far Eastern Federal University; Researcher, Institute of Chemistry FEB RAS.</p><p>10, Ajax Bay, Russky Island, Vladivostok, 690922; 159, Stoletiya Vladivostoka Ave., Vladivostok, 690022</p></bio><email xlink:type="simple">arefeva.od@dvfu.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/0009-0003-5301-9119</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Земнухова</surname><given-names>Л. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zemnukhova</surname><given-names>L. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Земнухова Людмила Алексеевна - доктор химических наук, профессор, главный научный сотрудник лаборатории химии редких металлов, Институт химии ДВО РАН.</p><p>690022, Владивосток, пр-т 100-летия Владивостока, 159</p></bio><bio xml:lang="en"><p>Liudmila A. Zemnukhova - Dr. Sci. (Chemistry), Professor, Chief Researcher, Laboratory of Chemistry of Rare Metals, Institute of Chemistry FEB RAS.</p><p>159, Stoletiya Vladivostoka Ave., Vladivostok, 690022</p></bio><email xlink:type="simple">zemnukhova@ich.dvo.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0005-3950-4892</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Самохина</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Samokhina</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Самохина Дарья Александровна – магистрант.</p><p>690922, Владивосток, о. Русский, п. Аякс, 10</p></bio><bio xml:lang="en"><p>Daria A. Samokhina - Master Student.</p><p>10, Ajax Bay, Russky Island, Vladivostok, 690922</p></bio><email xlink:type="simple">samokhina.da@students.dvfu.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт химии ДВО РАН; Дальневосточный федеральный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Chemistry Far-Eastern Branch, Russian Academy of Sciences; Far Eastern Federal University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт химии ДВО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Chemistry Far-Eastern Branch, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Дальневосточный федеральный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Far Eastern Federal University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>02</day><month>07</month><year>2023</year></pub-date><volume>13</volume><issue>2</issue><fpage>220</fpage><lpage>227</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ковехова А.В., Арефьева О.Д., Земнухова Л.А., Самохина Д.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Ковехова А.В., Арефьева О.Д., Земнухова Л.А., Самохина Д.А.</copyright-holder><copyright-holder xml:lang="en">Kovekhova A.V., Arefieva O.D., Zemnukhova L.A., Samokhina D.A.</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://vuzbiochemi.elpub.ru/jour/article/view/1016">https://vuzbiochemi.elpub.ru/jour/article/view/1016</self-uri><abstract><p>В работе представлены результаты изучения неорганических компонентов стеблей подсолнечника. Были исследованы экстракты, полученные при различных значениях рН среды, и образцы золы до и после обработки стеблей водой, кислотой и щелочью. Установлено, что природа экстрагента оказывает незначительное влияние на выход экстрактивных веществ из измельченных стеблей. По данным атомно-абсорбционного анализа, основными ионами в экстрактах, полученных в разных средах, являются ионы калия, кальция, магния и натрия. Массовая доля золы после обработки стеблей растворами при разных значениях рН изменяется от 0,5 до 5,2%. Наименьшим выходом золы характеризуется образец стеблей после экстракции кислотой. По данным энергодисперсионной рентгенофлуоресцентной спектроскопии, во всех образцах золы содержатся преимущественно соединения К, Са, Mg и Р. Также в работе были исследованы зольные компоненты сердцевины и внешней части стебля в сравнении с исходным образцом. Зольность сердцевины стебля (9,3%) выше, чем внешней оболочки (7,4%). Результаты ИК-спектроскопии показали, что характер расщепления полос в ИК-спектрах образцов золы практически не зависит от части стебля и предварительной обработки сырья при разных значениях рН. В ИК-спектрах золы стебля наблюдаются полосы поглощения, характерные для карбонатов и силикатов. По данным рентгенофазового анализа, изученные образцы золы находятся в кристаллическом состоянии.</p></abstract><trans-abstract xml:lang="en"><p>This paper presents the results of studying the inorganic components of sunflower stems. The test objects are the extracts obtained at different pH values of the medium and ash samples before and after treatment of stems with water, acid, and alkali. The results show that the nature of the extractant has a negligible effect on the yield of extractive substances from the crushed stems. According to atomic absorption analysis, the main ions in extracts obtained in different media are potassium, calcium, magnesium, and sodium ions. The mass fraction of ash after treatment of stems with solutions at different pH values varies from 0.5 to 5.2%. The lowest ash yield is characterized by a sample of stems after acid extraction. According to energy dispersive X-ray fluorescence spectroscopy, all ash samples contain mainly K, Ca, Mg, and P compounds. The ash components of the core and outer part of the stem were also studied in comparison with the original sample. The ash content of the stem core (9.3%) is higher than that of the outer shell (7.4%). The IR spectroscopy shows that the nature of band splitting in the IR spectra of the ash samples practically does not depend on the stem part and the pretreatment of raw materials at different pH values. Absorption bands characteristic of carbonates and silicates are observed in the IR spectra of the stem ash. According to X-ray diffraction analysis, the studied ash samples are in a crystalline state.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>стебли подсолнечника</kwd><kwd>стебли топинамбура</kwd><kwd>зола</kwd><kwd>экстрактивные вещества</kwd><kwd>неорганические компоненты</kwd></kwd-group><kwd-group xml:lang="en"><kwd>sunflower stems</kwd><kwd>Jerusalem artichoke (Helianthus tuberosus) stems</kwd><kwd>ash</kwd><kwd>extractive substances</kwd><kwd>inorganic components</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено в рамках государственного задания Института химии ДВО РАН (проект № FWFN(0205)-2022-0002, тема 2, раздел 5)</funding-statement><funding-statement xml:lang="en">The study was carried out within the framework of the state task of the Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences (project no. 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