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2003 Fiscal Year Final Research Report Summary

Research on food rheology in the mouth by mastication measurement.

Research Project

Project/Area Number 14380045
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 食生活
Research InstitutionKyoritsu Women's University

Principal Investigator

NAKAZAWA Fumiko  Kyoritsu Women's University, Home Economics, Professor, 家政学部, 教授 (60086725)

Co-Investigator(Kenkyū-buntansha) TAKAHASHI Junko  St. Cecilia Women's Junior College, Associate professor, 幼児教育学科, 助教授 (90146530)
MORITA Akiko  Kyoritsu Women's University, Home Economics, Assistant, 教育助手 (10333022)
Project Period (FY) 2002 – 2003
KeywordsMastication / Food / Gel・Sol / Rheoloeical property in the mouth / Maximum mastication force / Dynamic viscoelasticity / Palatal pressure / Flow velocity through pharynx
Research Abstract

1. Forces and movements of the first molar were measured while a subject was eating various textural foods. Force-displacement curves of foods in the mouth were obtained for the first bite of the food and compared with curves measured by a machine. The maximum force at the first bite for various foods was 200 N in contrast to 2500 N obtained by the machine. Foods with the smaller maximum force agreed with those that please to elderly people.
2. Palatal pressure while eating gellan gel of concentration 0.05 to 0.5 % was measured with six pressure transducers embedded in an artificial resin palate. When subjects were asked to eat the gel naturally, they ate the gel with a break stress below 30 kPa by pressing with the tongue and above it by biting with the teeth. Since dynamic viscoelastic moduli G' and G" of gellan gel changed by more than two orders of magnitude without frequency dependence below 0.5 % content, gellan may be of use as a natural agent for thickening.
3. An ultrasonic pulsed Doppler shift was used to measure the flow velocity of swallowed gellan sol and gel of 0 to 0.5 % through the pharynx just above the epiglottis. The average flow velocity of sol and gel with different gellan content and water was found to be 0.1 m/s almost independent of gellan content. By contrast, although the average of the maximum flow velocity of the gel was 0.2 m/s above 0.1 %, it increased for lower gellan content below 0.1 % and reached 0.5 m/s for pure water, showing a wide distribution of the velocity of water in the pharynx.

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 盛田明子, 中沢文子: "ゼラチン・寒天・カラギーナンゼリーの摂食時における口蓋圧と筋電位の同時測定"日本家政学会誌. 53・1. 7-14 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 盛田明子, 中沢文子: "ゼラチン・寒天・カラギーナンゼリーのヒトの口蓋圧計測と機器圧縮測定による特性の比較"日本家政学会誌. 53・5. 423-429 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 神山かおる, 中沢文子: "食物の咀嚼・嚥下におけるレオロジー"日本バイオレオロジー学会誌. 17・3. 117-119 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 高橋淳子, 盛田明子, 中沢文子: "咀嚼過程における口腔内の食品物性"日本バイオレオロジー学会誌. 17・3. 140-145 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中沢文子, 盛田明子: "咀嚼・嚥下の計測と物性"Food & Food Ingra dents J.Japan. 208・10. 835-842 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中沢文子: "咀嚼活動の多元計測による口腔内食品物性の解明,『老化抑制と食品』=高酸化・脳・咀嚼=,編集 独立行政法人食品総合研究所"(株)アイピーシー. 308-321 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中沢文子, 高橋淳子: "食物テクスチャーと噛む臼歯に生じる咀嚼力および口蓋圧,食物のテクスチャーと咀嚼音 他『おいしさの科学事典』,総編集 山野善正"朝倉書店. 295-298,307-313 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Akiko Morita, Fumiko Nakazawa: "Palatal pressure and electromyography while eating gelatin, agar and carrageenan jelly"Journal of home economics of Japan. 53・1. 4-14 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Akiko Morita, Fumiko Nakazawa: "Comparison of the palatal pressure measurements while eating gelatin, agar and carrageenan jelly with mechanical measurements of the pressure on the jelly"Journal of home economics of Japan. 53・5. 423-429 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kaoru Koyama, Fumiko Nakazawa: "Biorheology in mastication and swallowing of food"Journal of Biorheology of Japan. 17・3. 117-119 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Junko Takahashi, Akiko Morita, Fumiko Nakazawa: "Physical properties of foods during mastication"Journal of Biorheology of Japan. 17・3. 140-145 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Fumiko Nakazawa, Akiko Morita: "Mastication and swallowing measurement while eating gel and sol samples"Food & food ingredients journal of Japan. 208・10. 835-842 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Fumiko Nakazawa: "Physical property of foods in mouth by measurements of mastication activity."Food and aging control (ed. National Food Research Institute) (Industrial Publishing & Consulting Inc.). 308-321 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Fumiko Nakazawa, Junko Takahashi: "Food texture by mastication and palatal pressure, and others."Encyclopedia of 'oishisa' science (ed. Yoshimasa Yamano) (Asakura bookstore Co.). 295-298,307-313 (2003)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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