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        <identifier>oai:hiroshima.repo.nii.ac.jp:02011581</identifier>
        <datestamp>2025-02-22T09:52:42Z</datestamp>
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          <dc:title>食品の凍結乾燥過程における重量と電気容量の変化 &lt;技術論文&gt;</dc:title>
          <dc:title>A Relationship Between Weight and Capacitance Changes during Freeze-drying Process of Food</dc:title>
          <dc:creator>土肥, 貞夫</dc:creator>
          <dc:creator>Tohi, Sadao</dc:creator>
          <dc:creator>羽倉, 義雄</dc:creator>
          <dc:creator>Hagura, Yoshio</dc:creator>
          <dc:creator>鈴木, 寛一</dc:creator>
          <dc:creator>Suzuki, Kanichi</dc:creator>
          <dc:subject>590</dc:subject>
          <dc:description>The development of a non-destructive method was attempted for the measurement of food weight change (i.e. moisture content change) in a freeze-dryer. An aqueous solution of 10% dextrin was used as a food sample. Changes in both weight and temperature of the sample were simultaneously measured during a freeze-drying process. The capacitance of sample was also measured using two stainless steel heating shelf boards as a pair of electrode plates.    Sample temperature histories varied with the sample position in the dryer. Sample temperature did not precisely indicate the freeze-drying state of the sample. Determining the endpoint of freeze-drying based solely on the results of sample temperature measurements remained practical problems. The capacitance change showed a good correlation with the weight change. Thus, it is feasible to monitor the weight of a sample during freeze-drying by measuring its capacitance.</dc:description>
          <dc:description>凍結乾燥機内の食品の乾燥状態(重量変化)の非破壊測定法を検討した. 食品のモデルとして10%デキストリン水溶液を用いた. まず始めに, 食品を凍結乾燥したときの重量変化と温度変化を同時に測定して, 温度測定の有効性を検討した. 次に, 凍結乾燥機内の加熱用のステンレススチール製棚板2枚を電極板として利用して, 凍結乾燥過程における食品の電気容量変化を測定した. その結果, 凍結乾燥中の食品の温度変化は, 温度センサーの設置場所によって異なり, 正確に乾燥状態を表していないことが明らかとなった. また, 電気容量変化と重量変化との間には, 良好な相関関係があった. 凍結乾燥過程における食品の電気容量を測定することにより, 凍結乾燥機内の食品の乾燥状態を把握できる可能性が示唆された.</dc:description>
          <dc:description>http://purl.org/coar/resource_type/c_6501</dc:description>
          <dc:publisher>日本食品科学工学会</dc:publisher>
          <dc:date>2002-11-15</dc:date>
          <dc:type>VoR</dc:type>
          <dc:identifier>1341-027X</dc:identifier>
          <dc:identifier>AN10467499</dc:identifier>
          <dc:identifier>726</dc:identifier>
          <dc:identifier>日本食品科学工学会誌</dc:identifier>
          <dc:identifier>11</dc:identifier>
          <dc:identifier>49</dc:identifier>
          <dc:identifier>730</dc:identifier>
          <dc:identifier>726</dc:identifier>
          <dc:identifier>日本食品科学工学会誌</dc:identifier>
          <dc:identifier>https://hiroshima.repo.nii.ac.jp/records/2011581</dc:identifier>
          <dc:language>jpn</dc:language>
          <dc:relation>http://www.journalarchive.jst.go.jp/japanese/jnlabstract_ja.php?cdjournal=nskkk1995&amp;cdvol=49&amp;noissue=11&amp;startpage=726</dc:relation>
          <dc:rights>open access</dc:rights>
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