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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">biologyscience</journal-id><journal-title-group><journal-title xml:lang="ru">Тимирязевский биологический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Timiryazev Biological Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2949-4710</issn><publisher><publisher-name>ФГБОУ ВО РГАУ-МСХА имени К.А. Тимирязева (ФГБОУ ВО РГАУ-МСХА имени К.А. Тимирязева)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26897/2949-4710-2026-4-1-1-03</article-id><article-id custom-type="elpub" pub-id-type="custom">biologyscience-325</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>1 - БИОЛОГИЧЕСКИЕ РЕСУРСЫ, ЭКОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>1 - BIOLOGICAL RESOURCES, ECOLOGY</subject></subj-group></article-categories><title-group><article-title>Портативная система фильтрации для определения хлорофилла в экспедиционных условиях и криоконсервация проб</article-title><trans-title-group xml:lang="en"><trans-title>Portable filtration system for chlorophyll determination in expeditionary conditions and cryopreservation of samples</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1968-2609</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Алексеев</surname><given-names>Виктор Ростиславович</given-names></name><name name-style="western" xml:lang="en"><surname>Alekseev</surname><given-names>Viktor R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виктор Ростиславович Алексеев, доктор биологических наук, профессор, главный научный сотрудник лаборатории пресноводной и экспериментальной гидробиологии</p></bio><bio xml:lang="en"><p>Viktor R. Alekseev, DSc (Bio), Professor, Chief Research Associate at the Laboratory of Freshwater and Experimental Hydrobiology</p></bio><email xlink:type="simple">alekseev@zin.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>Максимова</surname><given-names>Ольга Борисовна</given-names></name><name name-style="western" xml:lang="en"><surname>Maksimova</surname><given-names>Olga B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ольга Борисовна Максимова, кандидат биологических наук, старший научный сотрудник лаборатории гидробиологии</p></bio><bio xml:lang="en"><p>Olga B. Maksimova, CSc (Bio), Senior Researcher Associate at the Hydrobiology Laboratory</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чабан</surname><given-names>Ольга Александровна</given-names></name><name name-style="western" xml:lang="en"><surname>Chaban</surname><given-names>Olga A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ольга Александровна Чабан, аспирант лаборатории пресноводной и экспериментальной гидробиологии</p></bio><bio xml:lang="en"><p>Olga A. Chaban, postgraduate student of the Laboratory of Freshwater and Experimental Hydrobiology</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Зоологический институт РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Zoological Institute of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Санкт-Петербургский филиал ФГБНУ «ВНИРО» («ГосНИОРХ» им. Л.С. Берга»)</institution><country>Russian Federation</country></aff><aff xml:lang="en"><institution>Saint Petersburg branch of the Russian Federal Research Institute of Fisheries and Oceanography</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>11</day><month>05</month><year>2026</year></pub-date><volume>4</volume><issue>1</issue><fpage>103</fpage><lpage>103</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Алексеев В.Р., Максимова О.Б., Чабан О.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Алексеев В.Р., Максимова О.Б., Чабан О.А.</copyright-holder><copyright-holder xml:lang="en">Alekseev V.R., Maksimova O.B., Chaban O.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.bioscience-journal.com/jour/article/view/325">https://www.bioscience-journal.com/jour/article/view/325</self-uri><abstract><p>В работе оценивается эффективность двух методов сбора проб хлорофилла в экспедиционных условиях. Первый метод основан на портативной фильтрационной системе с нагнетательным давлением через шприц, второй – на криоконсервации проб. Были проведены: сравнение шприцевой с традиционной вакуумной фильтрацией; тестирование разных типов фильтров (стекловолоконные и ацетатцеллюлозные); проверка стабильности хлорофилла при замораживании. Результаты показали: стекловолоконные фильтры с нагнетательной системой дают сопоставимые с вакуумом результаты (5.4 ± 1.52 против 6.01 ± 1.15 мкг/л); ацетатцеллюлозные фильтры не рекомендуются для использования с нагнетательной системой через шприц (занижение – на 55%); замораживание сохраняет хлорофилл в течение минимум 30 дней (статистически не отличаясь от свежесобранных проб). Предложенные модификации методов сбора рекомендуются для широкого использования в полевых условиях.</p></abstract><trans-abstract xml:lang="en"><p>The study evaluates the effectiveness of two methods for chlorophyll sampling in expeditionary conditions. The first method is based on a portable, syringe-based pressure filtration system, while the second involves cryopreservation of samples. The following were conducted: comparison of syringe-based filtration with conventional vacuum filtration; testing of different filter types (glass-fiber and cellulose acetate); verification of chlorophyll stability in freezing. The results showed that the pressure-driven system with glass-fiber filters provides results comparable to vacuum filtration (5.4 ± 1.52 vs. 6.01 ± 1.15 μg/L); cellulose acetate filters are not recommended for the syringe-based system (underestimation by 55%); cryopreservation preserves chlorophyll for at least 30 days (statistically indistinguishable from freshly collected samples). The proposed modifications of the sampling methods are recommended for widespread use in field conditions.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Портативная фильтрация</kwd><kwd>криоконсервация проб</kwd><kwd>фитопигменты</kwd><kwd>полевые исследования</kwd><kwd>сбор проб</kwd><kwd>Сахалин</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Portable filtration</kwd><kwd>cryopreservation of samples</kwd><kwd>photopigments</kwd><kwd>field research</kwd><kwd>sampling</kwd><kwd>Sakhalin</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках темы государственного задания № 125012800888-5</funding-statement><funding-statement xml:lang="en">The work was carried out within the framework of state assignment No. 125012800888-5</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">Boulion V.V. 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