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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/achb.1041</article-id><article-id custom-type="edn" pub-id-type="custom">SLSIBE</article-id><article-id custom-type="elpub" pub-id-type="custom">vuzbiochemi-1715</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>Экспресс-метод контроля содержания фотосинтетических пигментов в культуре низших фототрофов</article-title><trans-title-group xml:lang="en"><trans-title>Express method for assessing photosynthetic pigment content in lower phototrophs</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2120-9589</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Клочкова</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Klochkova</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Клочкова Виктория Сергеевна, младший научный сотрудник</p><p>299011, г. Севастополь, пр. Нахимова, 2</p></bio><bio xml:lang="en"><p>Viktoria S. Klochkova, Junior Researcher</p><p>2, Nakhimov Ave., Sevastopol, 299011</p></bio><email xlink:type="simple">vsklochkova@ibss-ras.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/0000-0001-7412-8283</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гудвилович</surname><given-names>И. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Gudvilovich</surname><given-names>I. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гудвилович Ирина Николаевна, к.б.н., старший научный сотрудник</p><p>299011, г. Севастополь, пр. Нахимова, 2</p></bio><bio xml:lang="en"><p>Irina N. Gudvilovich, Cand. Sci. (Biology), Senior Researcher</p><p>2, Nakhimov Ave., Sevastopol, 299011</p></bio><email xlink:type="simple">gudirina@ibss-ras.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/0000-0003-1213-7963</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лелеков</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Lelekov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лелеков Александр Сергеевич, д.б.н., ведущий научный сотрудник</p><p>299011, г. Севастополь, пр. Нахимова, 2</p></bio><bio xml:lang="en"><p>Alexander S. Lelekov, Dr. Sci. (Biology), Leading Researcher</p><p>2, Nakhimov Ave., Sevastopol, 299011</p></bio><email xlink:type="simple">a.lelekov@ibss-ras.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/0000-0001-6612-491X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Боровков</surname><given-names>А. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Borovkov</surname><given-names>A. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Боровков Андрей Борисович, к.б.н., ведущий научный сотрудник</p><p>299011, г. Севастополь, пр. Нахимова, 2</p></bio><bio xml:lang="en"><p>Andrei B. Borovkov, Cand. Sci. (Biology), Leading Researcher</p><p>2, Nakhimov Ave., Sevastopol, 299011</p></bio><email xlink:type="simple">biotex@ibss-ras.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральный исследовательский центр «Институт биологии южных морей имени А.О. Ковалевского РАН»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A.O. Kovalevsky Institute of Biology of the Southern Seas, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>06</day><month>07</month><year>2026</year></pub-date><volume>0</volume><issue>0</issue><issue-title>Принято в печать</issue-title><elocation-id>1715</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Клочкова В.С., Гудвилович И.Н., Лелеков А.С., Боровков А.Б., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Клочкова В.С., Гудвилович И.Н., Лелеков А.С., Боровков А.Б.</copyright-holder><copyright-holder xml:lang="en">Klochkova V.S., Gudvilovich I.N., Lelekov A.S., Borovkov A.B.</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/1715">https://vuzbiochemi.elpub.ru/jour/article/view/1715</self-uri><abstract><p>Целью работы являлась установка количественных закономерностей между сухим веществом, концентрацией фотосинтетических пигментов и оптической плотностью культур низших фототрофов. Объектами исследования стали красная морская микроводоросль Porphyridium purpureum (Bory) Drew et Ross и цианопрокариота Arthrospira (Spirulina) platensis North, которые выращивались в открытых бассейнах при естественном освещении. В экспериментах определялись сухое вещество, оптические плотности на длинах волн 545, 620, 680, 750 нм, а также концентрации пигментов (хлорофилл а, В-фикоэритрин и С-фикоцианин) по стандартным биохимическим методикам и по разделению истинных спектров поглощения методом кривых Гаусса. Определены коэффициенты линейной корреляции сухого вещества и оптической плотности D750, которые оказались близки для обоих объектов. Показано, что концентрации пигментов, рассчитанные биохимическими и математическими методами, линейно коррелируют при использовании стандартных коэффициентов экстинкции. Тангенсы углов наклона линейных корреляций для культуры Porphyridium purpureum составили 0,96 для хлорофилла а и 0,99 для В-фикоэритрина, для Arthrospira platensis – 1,46 и 1,3 для хлорофилла а и С-фикоцианина соответственно. Предложен альтернативный подход на основе оптической плотности культур ΔDλ и эмпирически определенного коэффициента. При увеличении длины оптического пути в 2 раза соотношение концентрации пигментов и ΔDλ для Porphyridium purpureum уменьшилось в 2 раза, а для Arthrospira platensis коэффициенты отличаются в 1,8–1,9 раза. Полученные формулы для расчета показателей культур Porphyridium purpureum и Arthrospira platensis позволят производить экспресс-оценку содержания хлорофилла и фикобилипротеинов в биомассе микроводорослей.</p></abstract><trans-abstract xml:lang="en"><p>This study aims to establish quantitative relationships between dry biomass, photosynthetic pigment concentrations, and optical density in cultures of lower phototrophs. The red marine microalga Porphyridium purpureum (Bory) Drew et Ross and the cyanoprokaryote Arthrospira (Spirulina) platensis North were used as model organisms and were cultivated in open ponds under natural illumination. In the experiments, dry biomass was measured together with optical density at 545, 620, 680, and 750 nm. Pigment concentrations (chlorophyll a, B-phycoerythrin, and C-phycocyanin) were determined using standard biochemical assays and by deconvolution of true absorption spectra with Gaussian curve fitting. Linear correlation coefficients between dry biomass and optical density at 750 nm (D750) were determined, and their values were similar for both species. Pigment concentrations calculated by biochemical and mathematical methods showed linear correlations when standard extinction coefficients were applied. For Porphyridium purpureum, the slopes of the linear correlations were 0.96 for chlorophyll a and 0.99 for B-phycoerythrin. For Arthrospira platensis, the corresponding values were 1.46 and 1.3 for chlorophyll a and C-phycocyanin, respectively. An alternative approach was developed based on culture optical density ΔDλ and an empirically determined coefficient. When the optical path length was doubled, the ratio of pigment concentration to ΔDλ decreased twofold for Porphyridium purpureum, whereas for Arthrospira platensis the coefficients differed by a factor of 1.8–1.9. The resulting equations for Porphyridium purpureum and Arthrospira platensis enable rapid estimation of chlorophyll and phycobiliprotein content in microalgal biomass.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>микроводоросли</kwd><kwd>спектр поглощения</kwd><kwd>оптическая плотность</kwd><kwd>биомасса</kwd><kwd>хлорофилл а</kwd><kwd>фикобилипротеины</kwd></kwd-group><kwd-group xml:lang="en"><kwd>microalgae</kwd><kwd>absorption spectrum</kwd><kwd>optical density</kwd><kwd>biomass</kwd><kwd>chlorophyll a</kwd><kwd>phycobiliproteins</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при поддержке грантов Российского научного фонда № 24-26-20131 «Разработка научного обоснования промышленного производства функциональных продуктов питания, включающих экстракты микроводоросли порфиридиум» (исследования культуры Porphyridium purpureum) и № 24-16-00245 «Оценка иммуномодулирующих и антиоксидантных свойств водного экстракта фикобилипротеинов (С-фикоцианин, B-фикоэритрин), перспективной кормовой добавки для гигантской устрицы Magallana gigas» (исследования культуры Arthrospira platensis).</funding-statement><funding-statement xml:lang="en">The Russian Science Foundation supported this work (grant no. 24-26-20131 “Scientific justification for the industrial production of functional food products, including porphyridium microalgae extracts” (study of Porphyridium purpureum culture) and grant no. 24-16-00245 “Evaluation of the immunomodulatory and antioxidant properties of phycobiliproteins aqueous extract (C-phycocyanin, B-phycoerythrin), a promising feed additive for the giant oyster Magallana gigas” (study of Arthrospira platensis culture)).</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">Каленик Т.К., Добрынина Е.В., Остапенко В.М., Тори Я., Хироми Ю. Исследование пигментов сине-зеленой водоросли спирулины платенсис для практического использования в технологиях кондитерских изделий // Вестник Воронежского государственного университета инженерных технологий. 2019. Т. 81. N 2. С. 170–176. DOI: 10.20914/2310-1202-2019-2-170-176. EDN: MIJHST.</mixed-citation><mixed-citation xml:lang="en">Kalenik T.K., Dobrynina E.V., Ostapenko V.M., Torii Y., Hiromi J. Research of pigments of blue-green algae Spirulina platensis for practical use in confectionery technology. Proceedings of the Voronezh State University of Engineering Technologies. 2019;81(2):170-176. (In Russian). DOI: 10.20914/2310-1202-2019-2-170-176.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Marzorati S., Schievano A. Idà A., Verotta L. Carotenoids, chlorophylls and phycocyanin from Spirulina: supercritical CO2 and water extraction methods for added value products cascade // Green Chemistry. 2020. Vol. 22, no. 1. P. 187–196. DOI: 10.1039/c9gc03292d.</mixed-citation><mixed-citation xml:lang="en">Marzorati S., Schievano A. Idà A., Verotta L. Carotenoids, chlorophylls and phycocyanin from Spirulina: supercritical CO2 and water extraction methods for added value products cascade. Green Chemistry. 2020;22(1):187-196. DOI: 10.1039/c9gc03292d.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Cunningham F.X., Dennenberg R.J., Mustardy L., Jursinic P.A., Gantt E. Stoichiometry of photosystem I, photosystem II, and phycobilisomes in the red alga Porphyridium cruentum as a function of growth irradiance // Plant Physiology. 1989. Vol. 91, no. 3. P. 1179–1187. DOI: 10.1104/pp.91.3.1179.</mixed-citation><mixed-citation xml:lang="en">Cunningham F.X., Dennenberg R.J., Mustardy L., Jursinic P.A., Gantt E. Stoichiometry of photosystem I, photosystem II, and phycobilisomes in the red alga Porphyridium cruentum as a function of growth irradiance. Plant Physiology. 1989;91(3):1179-1187. DOI: 10.1104/pp.91.3.1179.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Шкреблик У.Д, Дмитрович Н.П. Накопление основных пигментов в клетках водоросли Porphyridium purpureum в зависимости от условий культивирования // Инновационные технологии в промышленности и образовании: материалы I Междунар. науч. конф. (г. Пинск, 14 декабря 2023 г.). Пинск: Изд-во ПолесГУ, 2023. С. 390–392. EDN: VFELCR.</mixed-citation><mixed-citation xml:lang="en">Shkreblik U.D., Dmitrovich N.P. Accumulation of basic pigments in cells of the alga Porphyridium purpureum depending on the conditions of cultivation. In: Innovative technologies in industry and education: Proc. 1 st Int. Sci. Conf. 14 December 2023, Pinsk. Pinsk: Polessky State University; 2023, p. 390-392. (In Russian). EDN: VFELCR.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Markina Z.V. Flow cytometry as a method to study marine unicellular algae: development, problems, and prospects // Russian Journal of Marine Biology. 2019. Vol. 45, no. 5. P. 333–340. DOI: 10.1134/S1063074019050079. EDN: ADMOJP.</mixed-citation><mixed-citation xml:lang="en">Markina Z.V. Flow cytometry as a method to study marine unicellular algae: development, problems, and prospects. Russian Journal of Marine Biology. 2019;45(5):333-340. DOI: 10.1134/S1063074019050079. EDN: ADMOJP.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Рылькова О.А., Харчук И.А., Лелеков А.С., Лишаев В.Н., Жондарева Я.Д. Особенности предварительной пробоподготовки культуры Arthrospira (Spirulina) platensis при исследовании ассоциированной с ней микрофлоры методами проточной цитометрии и сканирующей электронной микроскопии // Морской биологический журнал. 2024. Т. 9. N 4. С. 81–95. DOI: 10.21072/mbj.2024.09.4.06. EDN: USFZQH.</mixed-citation><mixed-citation xml:lang="en">Rylkova O.A., Kharchuk I.A., Lelekov A.S., Lishaev V.N., Zhondareva Ya.D. Specifics of sample preparation of Arthrospira (Spirulina) platensis culture in the study of associated microflora by flow cytometry and scanning electron microscopy. Marine Biological Journal. 2024;9(4):81-95. (In Russian). DOI: 10.21072/mbj.2024.09.4.06. EDN: USFZQH.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Воронова О.К. Методика определения сухой биомассы микроводорослей в условиях интенсивного культивирования // Альгология. 1994. Т. 4. N 4. С. 59–62.</mixed-citation><mixed-citation xml:lang="en">Voronova O.K. Methodology for determining the dry biomass of microalgae under conditions of intensive cultivation. Al’gologiya. 1994;4(4):59-62. (In Russian).</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Нагорнов С.А., Мещерякова Ю.В. Исследование условий культивирования микроводоросли хлорелла в трубчатом фотобиореакторе // Вестник Тамбовского государственного технического университета. 2015. Т. 21. N 4. C. 653–659. DOI: 10.17277/vestnik.2015.04.pp.653-659. EDN: VAVKBL.</mixed-citation><mixed-citation xml:lang="en">Nagornov S.A., Meshcheryakova Yu.V. Research into conditions of chlorella vulgaris microalgae cultivation in a tubular photobioreactor. Transaction of the Tambov State Technical University. 2015;21(4):653-659. (In Russian). DOI: 10.17277/vestnik.2015.04.pp.653-659. EDN: VAVKBL.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Phytoplankton pigments in oceanography: guidelines to modern methods / eds S.W. Jeffrey, R.F.C. Mantoura, S.W. Wright. Paris: UNESCO Publ., 1997. 671 p.</mixed-citation><mixed-citation xml:lang="en">Jeffrey S.W., Mantoura R.F.C., Wright S.W. Phytoplankton pigments in oceanography: guidelines to modern methods. Paris: UNESCO Publ.; 1997, 671 p.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Kusumaningtyas P., Gultom S.D., Usman. Production of photosynthetic pigments from Spirulina platensis under different light intensities // Berkala Sainstek. 2023. Vol. 11, no. 3. P. 161–165. DOI: 10.19184/bst.v11i3.38474.</mixed-citation><mixed-citation xml:lang="en">Kusumaningtyas P., Gultom S.D., Usman. Production of photosynthetic pigments from Spirulina platensis under different light intensities. Berkala Sainstek. 2023;11(3):161-165. DOI: 10.19184/bst.v11i3.38474.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Железнова С.Н., Клочкова В.С., Геворгиз Р.Г. Оценка плотности культуры Porphyridium purpureum (Bory) Drew et Ross по рассеянию света суспензией клеток // Актуальные вопросы биологической физики и химии. 2021. Т. 6. N 4. С. 548–553. EDN: ARVTPH.</mixed-citation><mixed-citation xml:lang="en">Zheleznova S.N., Klochkova V.S., Gevorgiz R.G. Determination of culture Porphyridium purpureum (Bory) Drew et Ross density by light scattering by cell suspension. Russian Journal of Biological Physics and Chemisrty. 2021;6(4):548-553. (In Russian). EDN: ARVTPH.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Lu L., Yang G., Zhu B., Pan K. A comparative study on three quantitating methods of microalgal biomass // Indian Journal of Geo Marine Sciences. 2017. Vol. 46, no. 11. P. 2265–2272.</mixed-citation><mixed-citation xml:lang="en">Lu L., Yang G., Zhu B., Pan K. A comparative study on three quantitating methods of microalgal biomass. Indian Journal of Geo Marine Sciences. 2017;46(11):2265-2272.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Hoepffner N., Sathyendranath S. Effect of pigment composition on absorption properties of phytoplankton // Marine Ecology Progress Series. 1991. Vol. 73, no. 1. P. 11–23. DOI: 10.3354/MEPS073011.</mixed-citation><mixed-citation xml:lang="en">Hoepffner N., Sathyendranath S. Effect of pigment composition on absorption properties of phytoplankton. Marine Ecology Progress Series. 1991;73(1):11-23. DOI: 10.3354/MEPS073011.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Küpper H., Seibert S., Parameswaran A. Fast, sensitive, and inexpensive alternative to analytical pigment HPLC: quantification of chlorophylls and carotenoids in crude extracts by fitting with Gauss peak spectra // Analytical Chemistry. 2007. Vol. 79, no. 20. P. 7611–7627. DOI: 10.1021/ac070236m.</mixed-citation><mixed-citation xml:lang="en">Küpper H., Seibert S., Parameswaran A. Fast, sensitive, and inexpensive alternative to analytical pigment HPLC: quantification of chlorophylls and carotenoids in crude extracts by fitting with Gauss peak spectra. Analytical Chemistry. 2007;79(20):7611-7627. DOI: 10.1021/ac070236m.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Merzlyak M.N., Naqvi K.R. On recording the true absorption and scattering spectrum of a turbid sample: application to cell suspensions of the cyanobacterium Anabaena variabilis // Journal of Photochemistry and Photobiology B: Biology. 2000. Vol. 58, no. 2-3. P. 123–129. DOI: 10.1016/s1011-1344(00)00114-7.</mixed-citation><mixed-citation xml:lang="en">Merzlyak M.N., Naqvi K.R. On recording the true absorption and scattering spectrum of a turbid sample: application to cell suspensions of the cyanobacterium Anabaena variabilis. Journal of Photochemistry and Photobiology B: Biology. 2000;58(2-3):123-129. DOI: 10.1016/s1011-1344(00)00114-7.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Тренкеншу Р.П., Терсков И.А., Сидько Ф.Я. Плотные культуры морских микроводорослей // Известия Сибирского отделения Академии наук СССР. Серия биологических наук. 1981. N 5-1. С. 75–82. EDN: YPOVDM.</mixed-citation><mixed-citation xml:lang="en">Trenkenshu R.P., Terskov I.A., Sidko F.Ya. Dense cultures of marine microalgae. Izvestiya Sibirskogo otdeleniya Akademii nauk SSSR. Seriya biologicheskih nauk. 1981;5-1:75-82. (In Russian). EDN: YPOVDM.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Хлебович В.В. Критическая соленость биологических процессов. Л.: Наука, 1974. 235 с.</mixed-citation><mixed-citation xml:lang="en">Khlebovich V.V. Critical salinity of biological processes. Leningrad: Nauka; 1974, 235 p. (In Russian).</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Лелеков А.С., Чернышев Д.Н., Клочкова В.С. Количественные закономерности роста накопительной культуры Arthrospira platensis // Математическая биология и биоинформатика. 2022. Т. 17. N 1. С. 156–170. DOI: 10.17537/2022.17.156. EDN: XTTLPU.</mixed-citation><mixed-citation xml:lang="en">Lelekov A.S., Chernyshev D.N., Klochkova V.S. Quantitative regularities of growth of Arthrospira platensis batch culture. Matematicheskaya biologiya i bioinformatika. 2022;17(1):156-170. (In Russian). DOI: 10.17537/2022.17.156. EDN: XTTLPU.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Чернышёв Д.Н., Клочкова В.С., Лелеков А.С. Модель декомпозиции нативного спектра поглощения культуры Porphyridium purpureum // Вестник Самарского университета. Естественнонаучная серия. 2024. Т. 30. N 1. С. 122–131. DOI: 10.18287/2541-7525-2024-30-1-122-131. EDN: GWCZBG.</mixed-citation><mixed-citation xml:lang="en">Chernyshyov D.N., Klochkova V.S., Lelekov A.S. Model of decomposition of the native absorption spectrum of Porphyridium purpureum culture. Vestnik of Samara University. Natural Science Series. 2024;30(1):122-131. (In Russian). DOI: 10.18287/2541-7525-2024-30-1-122-131. EDN: GWCZBG.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Стадничук И.Н. Фикобилипротеины. М.: Изд-во ВИНИТИ, 1990. 196 c.</mixed-citation><mixed-citation xml:lang="en">Stadnichuk I.N. Phycobiliproteins. Moscow: All-Union Institute of Scientific and Technical Information of the USSR Academy of Sciences; 1990, 196 p. (In Russian).</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Duyens L.N.M. The flattering of the absorption spectrum of suspensions, as compared to that of solutions // Biochimica et Biophysica Acta. 1956. Vol. 19. P. 1–12. DOI: 10.1016/0006-3002(56)90380-8.</mixed-citation><mixed-citation xml:lang="en">Duyens L.N.M. The flattering of the absorption spectrum of suspensions, as compared to that of solutions. Biochimica et Biophysica Acta. 1956;19:1-12. DOI: 10.1016/0006-3002(56)90380-8.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Wu H., Li T., Lv J., Chen Z., Wu J., Wang N., et al. Growth and biochemical composition characteristics of Arthrospira platensis induced by simultaneous nitrogen deficiency and seawater-supplemented medium in an outdoor raceway pond in winter // Foods. 2021. Vol. 10, no. 12. P. 2974. DOI: 10.3390/foods10122974.</mixed-citation><mixed-citation xml:lang="en">Wu H., Li T., Lv J., Chen Z., Wu J., Wang N., et al. Growth and biochemical composition characteristics of Arthrospira platensis induced by simultaneous nitrogen deficiency and seawater-supplemented medium in an outdoor raceway pond in winter. Foods. 2021;10(12):2974. DOI: 10.3390/foods10122974.</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Borovkov A.B., Gudvilovich I.N., Lelekov A.S., Avsiyan A.L. Effect of specific irradiance on productivity and pigment and protein production of Porphyridium purpureum (Rhodophyta) semi-continuous culture // Bioresource Technology. 2023. Vol. 374. P. 128771. DOI: 10.1016/j.biortech.2023.128771.</mixed-citation><mixed-citation xml:lang="en">Borovkov A.B., Gudvilovich I.N., Lelekov A.S., Avsiyan A.L. Effect of specific irradiance on productivity and pigment and protein production of Porphyridium purpureum (Rhodophyta) semi-continuous culture. Bioresource Technology. 2023;374:128771. DOI: 10.1016/j.biortech.2023.128771.</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>
