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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Environmental Dynamics and Global Climate Change</journal-id><journal-title-group><journal-title xml:lang="en">Environmental Dynamics and Global Climate Change</journal-title><trans-title-group xml:lang="ru"><trans-title>Динамика окружающей среды и глобальные изменения климата</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2218-4422</issn><issn publication-format="electronic">2541-9307</issn><publisher><publisher-name xml:lang="en">Yugra State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">58932</article-id><article-id pub-id-type="doi">10.17816/edgcc58932</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Theoretical works</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Теоретические работы</subject></subj-group><subj-group subj-group-type="article-type"><subject>Unknown</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Kinetic isotopic effect: static Rayleigh equation and basic dynamic isotope equation for the substrate in the description of nitrite-dependent anaerobic oxidation of methane</article-title><trans-title-group xml:lang="ru"><trans-title>Kinetic isotopic effect: static Rayleigh equation and basic dynamic isotope equation for the substrate in the description of nitrite-dependent anaerobic oxidation of methane</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name><surname>Vavilin</surname><given-names>Vasiliy Aleksandrovich</given-names></name><address><country country="RU">Russian Federation</country></address><email>vavilin@iwp.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Water problems institute RAS</institution></aff><aff><institution xml:lang="ru">Институт водных проблем РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-12-10" publication-format="electronic"><day>10</day><month>12</month><year>2021</year></pub-date><volume>12</volume><issue>2</issue><issue-title xml:lang="ru"/><fpage>51</fpage><lpage>58</lpage><history><date date-type="received" iso-8601-date="2021-01-21"><day>21</day><month>01</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Vavilin V.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Vavilin V.A.</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Vavilin V.A.</copyright-holder><copyright-holder xml:lang="ru">Vavilin V.A.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://edgccjournal.org/EDGCC/article/view/58932">https://edgccjournal.org/EDGCC/article/view/58932</self-uri><abstract xml:lang="en"><p>The article analyzes the results of modeling the dynamics of nitrite-dependent methane oxidation (N-DAMO) by <italic>Methylomirabilis oxyfera</italic> microorganisms using the standard isotope dynamic equations. Without specifying a specific function of the rate of the process, the traditional static Rayleigh equation is derived from the basic dynamic isotope equation. Thus, the equation of the 1st order in terms of the substrate is only a special case in the derivation of the Rayleigh equation. It was shown that the dominant fractionation of carbon isotopes occurs in the process of the microbiological reaction of anaerobic oxidation of methane by nitrite, and not in the physical process of mass transfer of dissolved methane into the gas phase. In contrast to the static Rayleigh equation, the dynamic description of the process of fractionation of stable isotopes is important when describing the parallel transformations of the substrate.</p></abstract><trans-abstract xml:lang="ru"><p><italic>В статье приводятся результаты моделирования некоторых химико-биологических процессов с использованием стандартного изотопного динамического уравнения. Не задавая конкретную функцию скорости процесса, из основного динамического изотопного уравнения выведено традиционное статическое уравнение Релея. Исследованные динамические процессы включали рост водорослей (изотопы азота), денитрификацию нитрата в азот почвенными микроорганизмами (изотопы азота), метанизацию ацетата при различных концентрациях аммония (изотопы углерода), аэробное окисление метана (изотопы углерода и водорода), образование метана в донных олтложениях тропических озер (изотопы углерода), образование метана в торфе бореального мезотрофного болота (изотопы укглерода), образование метана с лаг-фазой в донных отложениях тропического озера (изотопы углерода), формирование анаэробного консорциума метан-окисляющих архей и сульфат-редуцирующих бактерий (изотопы серы), образование метана и двуокиси углерода в Западно-Сибирском евтрофном болоте (изотопы углерода), образование метана и его анаэробное окисление нитратом (изотопы углерода). </italic></p></trans-abstract><kwd-group xml:lang="en"><kwd>kinetic isotope effect, static Rayleigh equation, basic dynamic isotope equation, N-DAMO process</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>кинетический изотопный эффект, статическое уравнение Релея, основное динамическое изотопное уравнение, последовательные и параллельные реакции</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>1.	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