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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Foods and Raw Materials</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Foods and Raw Materials</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Foods and Raw Materials</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">2308-4057</issn>
   <issn publication-format="online">2310-9599</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">95027</article-id>
   <article-id pub-id-type="doi">10.21603/2308-4057-2026-1-656</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Research Article</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>Research Article</subject>
    </subj-group>
    <subj-group>
     <subject>Research Article</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Kelulut stingless bee honey stored under different thermal conditions: Non-destructive assessment</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Kelulut stingless bee honey stored under different thermal conditions: Non-destructive assessment</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6073-7205</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Chin</surname>
       <given-names>Yee Mun </given-names>
      </name>
      <name xml:lang="en">
       <surname>Chin</surname>
       <given-names>Yee Mun </given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7852-8073</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Saleena</surname>
       <given-names>Lejaniya Abdul Kalam </given-names>
      </name>
      <name xml:lang="en">
       <surname>Saleena</surname>
       <given-names>Lejaniya Abdul Kalam </given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Lim</surname>
       <given-names>Lee Ying </given-names>
      </name>
      <name xml:lang="en">
       <surname>Lim</surname>
       <given-names>Lee Ying </given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-3"/>
    </contrib>
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5305-4334</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Pui</surname>
       <given-names>Liew Phing </given-names>
      </name>
      <name xml:lang="en">
       <surname>Pui</surname>
       <given-names>Liew Phing </given-names>
      </name>
     </name-alternatives>
     <email>puilp@ucsiuniversity.edu.my</email>
     <xref ref-type="aff" rid="aff-4"/>
    </contrib>
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5293-7466</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Solihin</surname>
       <given-names>Mahmud Iwan </given-names>
      </name>
      <name xml:lang="en">
       <surname>Solihin</surname>
       <given-names>Mahmud Iwan </given-names>
      </name>
     </name-alternatives>
     <xref ref-type="aff" rid="aff-5"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">UCSI University</institution>
     <city>Kuala Lumpur</city>
     <country>Малайзия</country>
    </aff>
    <aff>
     <institution xml:lang="en">UCSI University</institution>
     <city>Kuala Lumpur</city>
     <country>Malaysia</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">UCSI University</institution>
     <city>Kuala Lumpur</city>
     <country>Малайзия</country>
    </aff>
    <aff>
     <institution xml:lang="en">UCSI University</institution>
     <city>Kuala Lumpur</city>
     <country>Malaysia</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">UCSI University</institution>
     <city>Kuala Lumpur</city>
     <country>Малайзия</country>
    </aff>
    <aff>
     <institution xml:lang="en">UCSI University</institution>
     <city>Kuala Lumpur</city>
     <country>Malaysia</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-4">
    <aff>
     <institution xml:lang="ru">UCSI University</institution>
     <city>Kuala Lumpur</city>
     <country>Малайзия</country>
    </aff>
    <aff>
     <institution xml:lang="en">UCSI University</institution>
     <city>Kuala Lumpur</city>
     <country>Malaysia</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-5">
    <aff>
     <institution xml:lang="ru">UCSI University</institution>
     <city>Kuala Lumpur</city>
     <country>Малайзия</country>
    </aff>
    <aff>
     <institution xml:lang="en">UCSI University</institution>
     <city>Kuala Lumpur</city>
     <country>Malaysia</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2025-02-14T00:00:00+03:00">
    <day>14</day>
    <month>02</month>
    <year>2025</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2025-02-14T00:00:00+03:00">
    <day>14</day>
    <month>02</month>
    <year>2025</year>
   </pub-date>
   <volume>14</volume>
   <issue>1</issue>
   <fpage>71</fpage>
   <lpage>83</lpage>
   <history>
    <date date-type="received" iso-8601-date="2024-04-01T00:00:00+03:00">
     <day>01</day>
     <month>04</month>
     <year>2024</year>
    </date>
    <date date-type="accepted" iso-8601-date="2024-07-02T00:00:00+03:00">
     <day>02</day>
     <month>07</month>
     <year>2024</year>
    </date>
   </history>
   <self-uri xlink:href="https://jfrm.ru/en/issues/23173/23290/">https://jfrm.ru/en/issues/23173/23290/</self-uri>
   <abstract xml:lang="ru">
    <p>Kelulut honey (Heterotrigona itama) is gaining popularity, which makes its quality assessment an important issue. We employed the method of near-infrared spectroscopy to perform a non-destructive quality assessment of refrigerated and non-refrigerated postharvest Kelulut honey. The research objective was to define the physical and chemical properties of Kelulut honey stored for 0, 1, 2, 7, and 14 days, as well as to establish effective prediction models based on the methods of principal component regression and partial least squares.&#13;
The Brix value, moisture content, and sugar content exhibited no significant differences (p &gt; 0.05) for the entire storage time.  However, the Brix value and sugar content decreased as the moisture increased during storage. pH values decreased while the hydroxymethylfurfural content increased across the entire storage time. Significant differences (p &gt; 0.05) were observed between the pH and hydroxymethylfurfural values for honey stored at different temperatures. The prediction model of sugar content based on principal component regression demonstrated acceptable accuracy (R2 = 0.7) and low mean squared error. After pre-processing and partial least squares regression, the method of near-infrared spectroscopy proved accurate and effective in defining the quality of Kelulut honey.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>Kelulut honey (Heterotrigona itama) is gaining popularity, which makes its quality assessment an important issue. We employed the method of near-infrared spectroscopy to perform a non-destructive quality assessment of refrigerated and non-refrigerated postharvest Kelulut honey. The research objective was to define the physical and chemical properties of Kelulut honey stored for 0, 1, 2, 7, and 14 days, as well as to establish effective prediction models based on the methods of principal component regression and partial least squares.&#13;
The Brix value, moisture content, and sugar content exhibited no significant differences (p &gt; 0.05) for the entire storage time.  However, the Brix value and sugar content decreased as the moisture increased during storage. pH values decreased while the hydroxymethylfurfural content increased across the entire storage time. Significant differences (p &gt; 0.05) were observed between the pH and hydroxymethylfurfural values for honey stored at different temperatures. The prediction model of sugar content based on principal component regression demonstrated acceptable accuracy (R2 = 0.7) and low mean squared error. After pre-processing and partial least squares regression, the method of near-infrared spectroscopy proved accurate and effective in defining the quality of Kelulut honey.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>Heterotrigona itama</kwd>
    <kwd>near-infrared spectroscopy (NIRS)</kwd>
    <kwd>physicochemical properties</kwd>
    <kwd>prediction model</kwd>
    <kwd>storage</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>Heterotrigona itama</kwd>
    <kwd>near-infrared spectroscopy (NIRS)</kwd>
    <kwd>physicochemical properties</kwd>
    <kwd>prediction model</kwd>
    <kwd>storage</kwd>
   </kwd-group>
   <funding-group>
    <funding-statement xml:lang="ru">The authors would like to express their gratitude to the Centre of Excellence for Research, Value Innovation, and Entrepreneurship (CERVIE) – UCSI University, for supporting this project under the PSIF project code: Proj-2019-ln- FETBE-063. Besides that, the authors would also like to thank Melipoly Sdn. Bhd. for providing honey.</funding-statement>
    <funding-statement xml:lang="en">The authors would like to express their gratitude to the Centre of Excellence for Research, Value Innovation, and Entrepreneurship (CERVIE) – UCSI University, for supporting this project under the PSIF project code: Proj-2019-ln- FETBE-063. Besides that, the authors would also like to thank Melipoly Sdn. Bhd. for providing honey.</funding-statement>
   </funding-group>
  </article-meta>
 </front>
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