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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">vestngau</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник университета биотехнологий</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik University of biotechnologiy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">3033-8433</issn><publisher><publisher-name>Publishing Centre “Zolotoy Kolos” of Novosibirsk State Agrarian University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31677/2072-6724-2024-72-3-185-195</article-id><article-id custom-type="elpub" pub-id-type="custom">vestngau-2371</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>ВЕТЕРИНАРИЯ, ЗООТЕХНИЯ И БИОТЕХНОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>VETERINARY, ANIMAL SCIENCES AND BIOTECHNOLOGY</subject></subj-group></article-categories><title-group><article-title>Прижизненная малоинвазивная оценка количества железа в печени свиней</article-title><trans-title-group xml:lang="en"><trans-title>Lifetime minimally invasive assessment of iron in the pig liver</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>Зайко</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaiko</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>О.А. Зайко, кандидат биологических наук</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>O.A. Zaiko, Ph.D. in Biological Sciences</p><p>Novosibirsk</p></bio><email xlink:type="simple">zheltikovaolga@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Новосибирский государственный аграрный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Novosibirsk State Agrarian University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>11</day><month>10</month><year>2024</year></pub-date><volume>0</volume><issue>3</issue><fpage>185</fpage><lpage>195</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Зайко О.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Зайко О.А.</copyright-holder><copyright-holder xml:lang="en">Zaiko 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://vestngau.elpub.ru/jour/article/view/2371">https://vestngau.elpub.ru/jour/article/view/2371</self-uri><abstract><p>Микроэлементы являются неотъемлемой частью организма млекопитающих, их содержание в органах и тканях связано с другими компонентами сложной биологической системы. На основании этого существует возможность оценивать уровень некоторых химических элементов в структурах организма прижизненно неинвазивно или малоинвазивно. Мясо и субпродукты сельскохозяйственных животных являются источником относительно легко усвояемого гемового железа, что может быть одной из характеристик качества сельскохозяйственной продукции в условиях широко распространённого железодефицита. Свиньи породы ландрас были выращены в типовых условиях промышленного комплекса, расположенного в Алтайском крае, с целью мясного откорма до живой массы 100 кг. Забор венозной крови выполняли острым методом из яремной вены с соблюдением принципов асептики и преаналитических правил. Гематологическое и биохимическое исследование крови и сыворотки животных выполнялось аппаратно. После убоя проводился отбор проб печени. Для оценки уровня железа в них использовался метод атомно-эмиссионного спектрального анализа с индуктивно-связанной плазмой на оборудовании iCAP-PRO (Thermo Fisher Scientific). Для работы с данными использовали ПО Microsoft Office Excel, среду анализа данных RStudio версии 2023.03.1 (RStudio, PBC) для языка программирования R. Для регрессионного анализа применялся метод наименьших квадратов. Подбор модели выполнялся пошаговым выбором предикторов в обоих направлениях с использованием информационного критерия Акаике, байесовского информационного критерия и скорректированный коэффициент детерминации. Оценивались допущения линейной регрессии. Итоговая регрессионная модель для определения уровня железа в печени свиней содержит среднее содержание гемоглобина в эритроците, гемоглобин и неорганический фосфор сыворотки крови в качестве предикторов. Между предикторами окончательной модели нет признаков мультиколлинеарности. Предлагаемая модель удовлетворяет выдвигаемые к ней требования о нормальности распределения остатков, отсутствию их скоррелированности и влиятельных наблюдений. Предлагаемая множественная регрессионная модель может использоваться для оценки уровня железа в печени свиней in vivo в различных целях.</p></abstract><trans-abstract xml:lang="en"><p>Microelements are an integral part of the mammalian body, and their content in organs and tissues is associated with other components of a complex biological system. Based on this, it is feasible to evaluate the concentration of specific chemical elements within the structures of the body in non-invasive or minimally invasive methods. The meat and by-products of farm animals serve as a readily assimilateable source of iron, which is one of the reasons for potentially defining the quality of agricultural products in conditions of widespread iron deficiency. Landrace pigs were raised in standard conditions at an industrial complex located in the Altai Territory in order to fatten up to a live weight of 100 kg. Venous blood was collected using the acute method from the jugular vein in accordance with the principles of asepsis and pre-analytical guidelines. The hematologic and biochemical examination of the blood and serum of animals was performed by apparatus. After slaughter, liver samples were collected, and the method of atomic emission spectral analysis using inductively coupled plasma on iCAP-PRO equipment (Thermo Fisher Scientific) was used to estimate the iron level in them. To manipulate the data, Microsoft Office Excel software and RStudio data analysis environment version 2023.03.1 (RStudio, PBC) were employed. For regression analysis, the least squares approach was used. The model was fitted using a stepwise selection of predictors in both directions using the Akaike information criterion, Bayesian information criterion, and adjusted coefficient of determination. The linear regression assumptions were evaluated. The final regression model used for determining iron levels in pig liver contains mean hemoglobin content in erythrocytes, hemoglobin, and serum inorganic phosphorus as predictors. There is no evidence that there is multicollinearity between the predictors of the final model. The proposed model satisfies the requirements for a normal distribution of residuals, the absence of their correlation, and influential observations. The proposed multiple regression model has the capability to estimate iron levels in pig liver in vivo for various purposes.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>железо</kwd><kwd>микроэлементы</kwd><kwd>печень</kwd><kwd>малоинвазивная диагностика</kwd><kwd>свиньи</kwd><kwd>паренхиматозные органы</kwd><kwd>субпродукты</kwd></kwd-group><kwd-group xml:lang="en"><kwd>iron</kwd><kwd>trace elements</kwd><kwd>liver</kwd><kwd>minimally invasive diagnostics</kwd><kwd>pigs</kwd><kwd>parenchymal organs</kwd><kwd>by-products</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">Генофонд скороспелой мясной породы свиней: монография / В.Л. Петухов, В.Н. Тихонов, А.И. Желтиков [и др.]. – Новосибирск: Издательско-полиграфическое объединение «Юпитер», 2005. – 631 с.</mixed-citation><mixed-citation xml:lang="en">Petukhov V.L., Tikhonov V.N., Zheltikov A.I. 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