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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2220-8054-2018-9-3-389-400</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-812</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="en"><subject>CHEMISTRY AND MATERIAL SCIENCE</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ХИМИЯ И МАТЕРИАЛОВЕДЕНИЕ</subject></subj-group></article-categories><title-group><article-title>Study of glucose concentration influence on blood optical properties in THz frequency range</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Gusev</surname><given-names>S. I.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kronverkskiy Ave, 49, St. Petersburg, 197101</p></bio><email xlink:type="simple">mail@gusev-spb.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Demchenko</surname><given-names>P. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kronverkskiy Ave, 49, St. Petersburg, 197101</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Litvinov</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kronverkskiy Ave, 49, St. Petersburg, 197101</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Cherkasova</surname><given-names>O. P.</given-names></name></name-alternatives><bio xml:lang="en"><p>Ac. Lavrentiev Ave, 13, Novosibirsk, 630090</p><p>K. Marksa Ave, 20, Novosibirsk, 630073</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Meglinski</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>P.O. Box 4500, FI-90015, Oulu</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Khodzitsky</surname><given-names>M. K.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kronverkskiy Ave, 49, St. Petersburg, 197101</p></bio><email xlink:type="simple">khodzitskiy@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="en">Terahertz Biomedicine laboratory, ITMO University<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="en">Biophysics laboratory, Institute of Laser Physics of SB RAS; Novosibirsk State Technical University<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="en">University of Oulu<country>Finland</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>14</day><month>08</month><year>2025</year></pub-date><volume>9</volume><issue>3</issue><fpage>389</fpage><lpage>400</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Gusev S.I., Demchenko P.S., Litvinov E.A., Cherkasova O.P., Meglinski I.V., Khodzitsky M.K., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Gusev S.I., Demchenko P.S., Litvinov E.A., Cherkasova O.P., Meglinski I.V., Khodzitsky M.K.</copyright-holder><copyright-holder xml:lang="en">Gusev S.I., Demchenko P.S., Litvinov E.A., Cherkasova O.P., Meglinski I.V., Khodzitsky M.K.</copyright-holder><license 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://nanojournal.ifmo.ru/jour/article/view/812">https://nanojournal.ifmo.ru/jour/article/view/812</self-uri><abstract><p>The optical properties of whole human blood with the different glucose level were studied by terahertz time-domain spectroscopy at frequencies ranging from 0.3 – 0.5 THz. The increasing of refractive index of blood at the glucose level growth was shown for series of experiments. The dispersion of complex refractive index of human nails was obtained. Based on these data, the non-invasive glucose measuring technique was proposed which utilizes the reflection of the THz pulse from nail plate/nail bed interface.</p></abstract><kwd-group xml:lang="en"><kwd>spectroscopy</kwd><kwd>THz frequency range</kwd><kwd>blood</kwd><kwd>glucose</kwd><kwd>diabetes</kwd></kwd-group><funding-group xml:lang="en"><funding-statement>This work was financially supported by the Government of Russian Federation, Grant 074-U01.</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">Shur M. Terahertz technology: devices and applications. Proceedings of ESSDERC, 2005, 35, P. 13–21.</mixed-citation><mixed-citation xml:lang="en">Shur M. 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