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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">pmedpharm</journal-id><journal-title-group><journal-title xml:lang="ru">Фармация и фармакология</journal-title><trans-title-group xml:lang="en"><trans-title>Pharmacy &amp; Pharmacology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2307-9266</issn><issn pub-type="epub">2413-2241</issn><publisher><publisher-name>Pyatigorsk Medical and Pharmaceutical Institute - branch of Volgograd State Medical Univer</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.19163/2307-9266-2021-9-5-356-366</article-id><article-id custom-type="elpub" pub-id-type="custom">pmedpharm-936</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>ФАРМАКОГНОЗИЯ, БОТАНИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHARMACOGNOSY, BOTANY</subject></subj-group></article-categories><title-group><article-title>МЕТОДИКА КОЛИЧЕСТВЕННОГО ОПРЕДЕЛЕНИЯ СУММЫ  ФЛАВОНОИДОВ В ПОЧКАХ ДУБА ЧЕРЕШЧАТОГО QUERCUS ROBUR L.</article-title><trans-title-group xml:lang="en"><trans-title>METHODS FOR QUANTITATIVE DETERMINATION  OF TOTAL FLAVONOIDS IN QUERCUS ROBUR L. BUDS</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1332-953X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рябов</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Ryabov</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант кафедры фармакогнозии с ботаникой и основами фитотерапии</p></bio><bio xml:lang="en"><p>Postgraduate student of the Department of Pharmacognosy with Botany and the basics of Phytotherapy</p></bio><email xlink:type="simple">ryabov.nikolay.2014@mail.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/0000-0002-8399-9328</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рыжов</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Ryzhov</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат фармацевтических наук, доцент кафедры фармакогнозии с ботаникой и основами фитотерапии</p></bio><bio xml:lang="en"><p>Candidate of Sciences (Pharmacy), Associate Professor of the Department of Pharmacognosy with Botany and the basics of Phytotherapy</p></bio><email xlink:type="simple">lavr_rvm@mail.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/0000-0002-7513-9352</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Куркин</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kurkin</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор фармацевтических наук, профессор, заведующий кафедрой фармакогнозии с ботаникой и основами фитотерапии</p></bio><bio xml:lang="en"><p>Doctor of Sciences (Pharmacy), Professor, Head of the Department of Pharmacognosy with Botany and the basics of Phytotherapy</p></bio><email xlink:type="simple">v.a.kurkin@samsmu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральное государственное бюджетное образовательное учреждение высшего образования &#13;
«Самарский государственный медицинский университет» Министерства здравоохранения &#13;
Российской Федерации&#13;
443099, Россия, г. Самара, ул. Чапаевская, 89</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Samara State Medical University&#13;
89, Chapayevskaya St., Samara, Russia, 443099</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>25</day><month>10</month><year>2021</year></pub-date><volume>9</volume><issue>5</issue><fpage>356</fpage><lpage>366</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Рябов Н.А., Рыжов В.М., Куркин В.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Рябов Н.А., Рыжов В.М., Куркин В.А.</copyright-holder><copyright-holder xml:lang="en">Ryabov N.A., Ryzhov V.M., Kurkin V.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://www.pharmpharm.ru/jour/article/view/936">https://www.pharmpharm.ru/jour/article/view/936</self-uri><abstract><p>В настоящее время актуальной задачей современной фармации является изучение химического состава и фармакологических свойств растительных объектов. В рамках данного направления представляется интересным изучение почек дуба черешчатого Quercus robur L. Одной из перспективных групп биологически активных соединений почек дуба являются флавоноиды. Данная группа веществ обладает широким спектром фармакологической активности, что является значимым при создании новых лекарственных препаратов на основе лекарственного растительного сырья.</p><sec><title>Цель</title><p>Цель. Разработка методики количественного определения суммы флавоноидов в почках дуба черешчатого Quercus robur L.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Материалом исследования являлись водно-спиртовые извлечения почек дуба черешчатого Quercus robur L. на спирте этиловом 70%, которые анализировали методом дифференциальной УФ-спектрофотометрии на спектрофотометре «СФ 2000» (Россия).</p></sec><sec><title>Результаты</title><p>Результаты. Разработана методика количественного определения суммы флавоноидов в почках дуба черешчатого методом дифференциальной УФ-спектрофотометрии с использованием стандартного образца цинарозида при аналитической длине волны 400 нм. Установлены оптимальные параметры экстрагирования суммы флавоноидов из почек дуба черешчатого: оптимальный экстрагент – 70% спирт этиловый; соотношение «сырьё-экстрагент» – 1:50; время экстракции – 120 мин, степень измельчения – 2 мм.</p><p>Определено содержание суммы флавоноидов для почек дуба черешчатого, которое варьирует от 0,27%±0,01 до 0,44%±0,02. Данные результаты позволяют рекомендовать в качестве нижнего предела содержание суммы флавоноидов для данного вида сырья не менее 0,25%.</p></sec><sec><title>Заключение</title><p>Заключение. Полученные в ходе эксперимента данные позволяют сделать вывод о перспективности дальнейшего изучения почек дуба черешчатого, а также способствуют внедрению лекарственного растительного сырья «Дуба черешчатого почки» в Государственную Фармакопею Российской Федерации.</p></sec></abstract><trans-abstract xml:lang="en"><p>Currently, the actual task of modern pharmacy is to study the chemical composition and pharmacological properties of plant objects. Within the framework of this concept, it seems interesting to study Quercus robur L. buds. One of the promising groups of biologically active compounds of Quercus robur L. buds are flavonoids. This group of substances has a wide range of a pharmacological activity, which is significant in the creation of new medicines based on medicinal plant raw materials.</p><p>The aim of the article was to work out methods for quantitative determination of total flavonoids in Quercus robur l. buds.</p><sec><title>Materials and methods</title><p>Materials and methods. The research materials were aqueous-alcoholic extracts from Quercus robur L. buds with 70% ethyl alcohol which were analyzed by differential UV spectrophotometry on spectrophotometer “SF 2000” (Russia).</p></sec><sec><title>Results</title><p>Results. The methods for quantitative determination of total flavonoids in Quercus robur L. buds by differential UV spectrophotometry, has been developed using a standard sample of cynaroside at the analytical wavelength of 400 nm. The optimum parameters for the extraction of total flavonoids from Quercus robur L. buds have been determined. They are: the optimum extractant is 70% ethyl alcohol; the “raw material-extractant” ratio is 1:50; the extraction time is 120 min, the degree of atomization is 2 mm.</p><p>The content of total flavonoids for Quercus robur L. buds has been determined; it varies from 0.27%±0.01 to 0.44%±0.02. These results make possible to recommend the content of total flavonoids for this type of raw materials not less than 0.25% as a lower limit.</p></sec><sec><title>Conclusion</title><p>Conclusion. The data obtained in the course of the experiment, makes it possible to conclude that a further study of Quercus robur L. buds is promising, and it also contributes to the implementation of medicinal plant raw materials “Quercus robur L. buds” in the State Pharmacopoeia (Russia).</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>Дуб черешчатый</kwd><kwd>Quercus robur L.</kwd><kwd>почки</kwd><kwd>флавоноиды</kwd><kwd>цинарозид</kwd><kwd>дифференциальная спектрофотометрия</kwd><kwd>стандартизация</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Quercus robur L.</kwd><kwd>buds</kwd><kwd>flavonoids</kwd><kwd>cynaroside</kwd><kwd>differential spectrophotometry</kwd><kwd>standardization</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Данное исследование не имело какой-либо финансовой поддержки от сторонних организаций.</funding-statement><funding-statement xml:lang="en">This study did not have any external support.</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">Маевский П.Ф. Флора средней полосы европейской части России. 11-е изд. – М.: Товарищество научных изданий КМК. – 2014. – 635 с.</mixed-citation><mixed-citation xml:lang="en">Maevsky PF. Flora of the middle zone of the European part of Russia. 11th ed. M.: Partnership of scientific publications KMK, 2014; 200-1. Russian</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Grotewold E. The Science of Flavonoids. New York: Springer. – 2006. – Vol. 35. DOI: 10.1007/978-0-387-28822-2.</mixed-citation><mixed-citation xml:lang="en">Grotewold E. The Science of Flavonoids. New York: Springer. 2006;35. DOI: 10.1007/978-0-387-28822-2.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Cushnie T.P., Lamb A.J. Recent advances in understanding the antibacterial properties of flavonoids // Int. J. Antimimicrob Agents. – 2011. – P. 38:99–107. DOI: 10.1016/j.ijantimicag.2011.02.014.</mixed-citation><mixed-citation xml:lang="en">Cushnie TP, Lamb AJ. Recent advances in understanding the antibacterial properties of flavonoids. Int J Antimicrob Agents. 2011 Aug;38(2):99–107. DOI: 10.1016/j.ijantimicag.2011.02.014.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Magnus S., Gazdik F., Anjum N.A., Kadlecova E., Lackova Z., Cernei N., Brtnicky M., Kynicky J., Klejdus B., Necas T., Zitka O. Assessment of Antioxidants in Selected Plant Rootstocks // Antioxidants (Basel). – 2020. – Vol. 9, No.3. – Art. No.209. DOI: 10.3390/antiox9030209.</mixed-citation><mixed-citation xml:lang="en">Magnus S, Gazdik F, Anjum NA, Kadlecova E, Lackova Z, Cernei N, Brtnicky M, Kynicky J, Klejdus B, Necas T, Zitka O. Assessment of Antioxidants in Selected Plant Rootstocks. Antioxidants (Basel). 2020 Mar 3;9(3):209. DOI: 10.3390/antiox9030209.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Dureshahwar K., Mubashir M., Upaganlwar A.B., Sangshetti J., Upasani C., Une H. Quantitative assessment of tactile allodynia and protective effects of flavonoids of Ficus carica Lam. leaves in diabetic neuropathy // Pharmacognosy Magazine. – 2019. – Vol. 15, Issue 62. – P. 128–134. DOI: 10.4103 / pm.pm_553_18.</mixed-citation><mixed-citation xml:lang="en">Dureshahwar K, Mubashir M, Upaganlwar AB, Sangshetti J, Upasani C, Une H. Quantitative assessment of tactile allodynia and protective effects of flavonoids of Ficus carica Lam. leaves in diabetic neuropathy. Pharmacognosy Magazin. 2019; 15 (Issue 62): 128–34. DOI: 10.4103/pm.pm_553_18.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Макарова Н.В., Игнатова Д.Ф., Еремеева Н.Б. Влияние технологии экстрагирования на содержание фенолов, флавоноидов и уровень антиоксидантной активности для плодов шиповника (Rosa L.), коры дуба (Quercus robur L.), корня ревеня (Rheum officinale), корня женьшеня (Panax L.), почек березы (Betula L.) // Химия растительного сырья, – 2020. – № 3. – С. 271–278. DOI: 10.14258/jcprm.2020036608.</mixed-citation><mixed-citation xml:lang="en">Makarova N, Ignatova D, Eremeeva NB. Influence of extraction technology on the content of phenols, flavonoids and antioxidant activity for hips (Rosa L.), Oak bark (Quercus robur L.), root Rhena (Rheum officinale), Ginseng root (Panax L.), buds birch (Betula L.). Chemistry of plant raw material. 2020;3:271–8. DOI: 10.14258/jcprm.2020036608</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Eaton E., Caudullo G., Oliveira S., de Rigo D. Quercus robur and Quercus petraea in Europe: distribution, habitat, usage and threats. European Atlas of Forest Tree Species. Publi.: Public Office of the European Union, Luxembourg. – 2016. – С. 162–163.</mixed-citation><mixed-citation xml:lang="en">Eaton E, Caudullo G, Oliveira S, de Rigo D. Quercus robur and Quercus petraea in Europe: distribution, habitat, usage and threats. European Atlas of Forest Tree Species. Publi.: Public Office of the European Union, Luxembourg. 2016:162–3.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Буданцев А.Л., Растительные ресурсы России: Дикорастущие цветковые растения, их компонентный состав и биологическая активность. Том. 1. Семейства Actinidiaceae-Malvaceae, Euphorbiaceae-Haloragaceae. / отв. ред. А.В. Буданцев. СПб.; М., Товарищество научных изданий КМК, 2009. – 158 с.</mixed-citation><mixed-citation xml:lang="en">Budantsev AL., Plant resources of Russia: Wild flowering plants, their component composition and biological activity. Vol. 1. Families Actinidiaceae-Malvaceae, Euphorbiaceae-Haloragaceae. Ed. by A.V. Budantsev. Saint Petersburg; Moscow, Scientific Publishing House KMK, 2009; 158.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Okuda T. Systematics and health effects of chemically distinct tannins in medicinal plants. Phytochemistry. – 2005. – Vol. 66. – P. 2012–2031.</mixed-citation><mixed-citation xml:lang="en">Okuda T. Systematics and health effects of chemically distinct tannins in medicinal plants. Phytochemistry. 2005; 66:2012–31.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Elansary O.H., Szopa A., Kubica P., Ekiert H., Mattar A.M., Al-Yafrasi M.A., et al. Polyphenol Profile and Pharmaceutical Potential of Quercus spp. Bark Extracts // Plants. – 2019. – Vol. 8, No.11. – Art. No.486. DOI: https://doi.org/10.3390/plants8110486.</mixed-citation><mixed-citation xml:lang="en">Elansary OH, Szopa A, Kubica P, Ekiert H, Mattar AM, Al-Yafrasi MA, et al. Polyphenol Profile and Pharmaceutical Potential of Quercus spp. Bark Extracts. Plants. 2019; 8(11):486. DOI: 10.3390/plants8110486.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Milton Prabu S. Quercetin: a flavonol with universal therapeutic use and its interactions with other drugs. Nonvitamin and Nonmineral Nutritional Supplements. – 2019. – Vol. 106. – P. 256–271. DOI: 10.1016 / B978-0-12-812491-8.00010-2.</mixed-citation><mixed-citation xml:lang="en">Milton Prabu S. Quercetin: a flavonol with universal therapeutic use and its interactions with other drugs. Nonvitamin and Nonmineral Nutritional Supplements. 2019;106:256–71. DOI: 10.1016/B978-0-12-812491-8.00010-2.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Pérez A.J., Pecio Ł., Kowalczyk M., Kontek R., Gajek G., Stopinsek L., Mirt I., Oleszek W., Stochmal A. Triterpenoid Components from Oak Heartwood (Quercus robur) and Their Potential Health Benefits // J Agric Food Chem. – 2017. – Vol. 65, No.23. – P. 4611–4623. DOI: 10.1021/acs.jafc.7b01396.</mixed-citation><mixed-citation xml:lang="en">Pérez AJ, Pecio Ł, Kowalczyk M, Kontek R, Gajek G, Stopinsek L, Mirt I, Oleszek W, Stochmal A. Triterpenoid Components from Oak Heartwood (Quercus robur) and Their Potential Health Benefits. J Agric Food Chem. 2017 Jun 14;65(23):4611–23. DOI: 10.1021/acs.jafc.7b01396.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Nassima B., Behidj-Benyounes N., Ksouri R. Antimicrobial and antibiofilm activities of phenolic compounds extracted from Populus nigra and Populus alba buds (Algeria) // Brazilian Journal of Pharmaceutical Sciences. – 2019. – Vol. 55. DOI: 10.1590/s2175-97902019000218114.</mixed-citation><mixed-citation xml:lang="en">Nassima B, Behidj-Benyounes N, Ksouri R. Antimicrobial and antibiofilm activities of phenolic compounds extracted from Populus nigra and Populus alba buds (Algeria). Brazilian Journal of Pharmaceutical Sciences. 2019;55. DOI: 10.1590/s2175-97902019000218114/</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Куркин В.А., Павел П.В., Рыжов В.М. Количественное определение суммы флавоноидов в почках каштана конского обыкновенного // Химико-фармацевтический журнал. – 2019. – Т. 53, №2. – С. 47–51. DOI: 10.30906/0023-1134-2019-53-2-47-51.</mixed-citation><mixed-citation xml:lang="en">Kurkin VA, Belov PV, Ryzhov VM. The quantitative determination of the amount of flavonoids in the buds of the horse chestnut. Pharmaceutical Chemistry Journal. 2019;53(2):47–51. DOI: 10.30906/0023-1134-2019-53-2-47-51. Russian</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Куркин В.А., Белов П.В., Рыжов В.М., Браславский В.Б. Определение содержания рамноцитрина в почках каштана конского обыкновенного методом ВЭЖХ // Химико-фармацевтический журнал. – 2019. – Т. 53, №12. – С. 21–25. DOI: 10.30906/0023-1134-2019-53-12-21-25.</mixed-citation><mixed-citation xml:lang="en">Kurkin VA, Belov PV, Ryzhov VM, Braslavsky VB. Determination of the content of rhamnocytrin in the buds of horse chestnut by HPLC. Pharmaceutical Chemistry Journal. 2019; 53(12):21–5. DOI: 10.30906/0023-1134-2019-53-12-21-25. Russian</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Куркина А.В., Савельева А.Е., Куркин В.А. Количественное определение суммы флавоноидов в цветках бархатцев отклоненных // Химико-фармацевтический журнал. – 2021. – Т. 55, №2. – С. 46–50. DOI: 10.30906/0023-1134-2021-55-2-46-50.</mixed-citation><mixed-citation xml:lang="en">Kurkina AV, Savelyeva AE, Kurkin VA. The quantitative determination of the amount of flavonoids in the flowers of rejected marigolds. Chemical and pharmaceutical journal. 2021; 55(2):46-50. DOI: 10.30906 / 0023-1134-2021-55-2-46-50. Russian</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Lysiuk R., Hudz N. Differential Spectrophotometry: Application for Quantification of Flavonoids in Herbal Drugs and Nutraceuticals Editorial // International Journal of Trends in Food and Nutrition. – 2017. – Vol. 1. – Art. No. 102.</mixed-citation><mixed-citation xml:lang="en">Lysiuk R, Hudz N. Differential Spectrophotometry: Application for Quantification of Flavonoids in Herbal Drugs and Nutraceuticals Editorial. International Journal of Trends in Food and Nutrition. 2017; 1:102.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Адекенов С.М., Байсаров Г.М., Хабаров И.А., Поляков В.В. Флавоноиды почек тополя бальзамического Populus balsamifera L. и способы их выделения // Химия растительного сырья. – 2020. – Т. 2. – С. 181–188. DOI: 10.14258/jcprm.2020027602.</mixed-citation><mixed-citation xml:lang="en">Adekenov SM, Baisarov GM, Khabarov IA, Polyakov BB. Flavonoids in the buds of Populus balsamifera L. and methods of their isolation. Chemistry of vegetable raw materials. 2020;2:181–8. DOI: 10.14258/jcprm.2020027602.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Bunaciu A.A., Vu Dang H., Hassan Y. Aboul-Enein. Applications of Differential Spectrophotometry in Analytical Chemistry // Critical Reviews in Analytical Chemistry. – 2013. – Vol. 43, No.3. – P. 25–130. DOI: 10.1080/10408347.2013.803357.</mixed-citation><mixed-citation xml:lang="en">Bunaciu AA, Vu Dang H, Hassan Y. Aboul-Enein. Applications of Differential Spectrophotometry in Analytical Chemistry. Critical Reviews in Analytical Chemistry. 2013; 43(3): 25–130. DOI: 10.1080/10408347.2013.803357.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Бубенчиков Р.А., Гончаров Н.Н. Разработка и валидация методики количественного определения флавоноидов в траве кульбабы осенней (Leontodon autumnalis L.) // Фармация и фармакология. – 2016. – Т. 4, №1(14). – С. 26–35. DOI: 10.19163/2307-9266-2016-4-1(14)-26-35.</mixed-citation><mixed-citation xml:lang="en">Bubenchikov RA, Goncharov NN. Working out and validation of the method of the quantitative determination of flavonoids in the herb of Leontodon autumnalis L. Pharmacy &amp; Pharmacology. 2016; 4(1(14)):26–35. (In Russ.) DOI: 10.19163/2307-9266-2016-4-1(14)-26-35.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Бубенчикова В.Н., Старчак Ю.А. Изучение фенольных соединений тимьяна мелового (Thymus cretaceus Klok. et Schost.) // Scientific Bulletin of Belgorod State University. – 2011. – Vol. 16/2, No.22. – P. 203–206.</mixed-citation><mixed-citation xml:lang="en">Bubenchikova VN, Starchak YuA. Validation of the method for the quantitative determination of the amount of flavonoids in thyme herb. Scientific Bulletin of Belgorod State University. 2011;16/2(22):203–6. Russian</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Зименкина Н.И., Куркин В.А. Разработка подходов к стандартизации листьев ореха грецкого // Фармация. – 2020. – Т. 69, №7. – С. 23–28. DOI: 10.29296/25419218-2020-07-04.</mixed-citation><mixed-citation xml:lang="en">Zimenkina NI, Kurkin VA. Development of approaches to standardization of walnut leaves. Pharmacy. 2020;69(7):23–28. DOI: 10.29296 / 25419218-2020-07-04. Russian</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Рябов Н.А., Рыжов В.М., Тарасенко Л.В., Сохина А.А. Анатомо-морфологическое исследование почек дуба черешчатого Quercus robur L. Фармацевтическая ботаника: современность и перспективы: Сб. мат. конф. ФГБОУ ВО Самарский государственный медицинский университет Минздрава России; Изд-во Самарский государственный медицинский университет, 2017. – С. 149–158.</mixed-citation><mixed-citation xml:lang="en">Ryabov NA, Ryzhov VM, Tarasenko LV, Sokhina AA. Anatomical and morphological study of the buds of the Quercus robur L. Pharmaceutical botany: modernity and prospects: Collection of materials. FSBEI HE Samara State Medical University of the Ministry of Health of Russia. 2017;149–58. Russian</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Рябов Н.А., Куркин В.А., Рыжов В.М., Лямин А.В., Жестков А.В., Сохина А.А. Определение антимикробной активности спиртовых извлечений коры и почек дуба черешчатого // Аспирантский Вестник Поволжья. – 2020. – №1–2. – С. 152–157. DOI: 10.17816/2072-2354.2020.20.1.152-157.</mixed-citation><mixed-citation xml:lang="en">Ryabov NA, Kurkin VA, Ryzhov VM, et al. Determination of the antimicrobial activity of alcoholic extracts of the bark and buds of Quercus robur. Postgraduate Bulletin of the Volga Region. 2020; 1-2:152-7. DOI: 10.17816/2072-2354.2020.20.1.152–157. Russian</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Халилов Р.М., Адилов З.Х., Юсупова С.М., Сулейманова З.Р., Маматханов А.У., Турахожаев М.Т., Котенко Л.Д., Сыров В.Н. Технология получения очищенной суммы флавоноидов из корней Pseudosophora alopecuroides и оценка ее гепатопротекторной и желчесекреторной активности // Химико-фармацевтический журнал. – 2005. – Т. 39, №2. – С. 25–27. DOI: 10.30906/0023-1134-2005-39-2-25-27.</mixed-citation><mixed-citation xml:lang="en">Halilov RM, Adilov ZH, YUsupova SM, Sulejmanova ZR, Mamathanov AU, Turahozhaev MT, Kotenko LD, Syrov VN. Technology of obtaining of the cleaned amount flavonoids from roots of Pseudosophora alopecuroides and evaluation of its hepatoprotective and bile secretion activities. Chemical and pharmaceutical journal. 2005;39(2):25–7. DOI: 10.30906/0023-1134-2005-39-2-25-27. Russian</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
