若年者と高齢者の嚥下に対する即溶性寒天の硬さ・味・量における影響 Effects of Hardness, Taste and Amount of Low-Gel-Strength Agar on Swallowing in Young and Elderly Subjects

Author(s)

Abstract

嚥下しやすい食品の要因を評価するために,物性がゼラチンに近いといわれている即溶性低強度寒天(LGSA: low-gel-strength agar)を試料として用い,物性測定はクリープメーター(山電製・日本)を使用して研究をおこなった.今回の結果では,甘味,塩味,酸味を呈する試料の硬さが濃度の変化に相応して,無味の試料にくらべて高いことが示唆された.さらに LGSA を用いて嚥下における総合的官能評価 [濃度(硬さ)・味・量] を 20 歳代の健常な学生群と 70~80 歳代の健常な高齢者群に対しておこなったところ,健常な学生群は 1.1%が好ましい濃度(硬さ)であり,さらに味では甘味が,量に関しては 5.0 g が口腔内においてもっとも嚥下しやすいと評価した.一方健常な高齢者群は甘味のみが嚥下しやすいと評価した.これらのことから,食品の物性を含むいくつかの要因が嚥下にたいして関与していることが示唆された.

Low-gel-strength agar (LGSA), which has recently been developed as a material close to gelatin in its physical properties, was used in this study to prepare samples for evaluating the factors facilitating swallowing. The subjects were assigned to two groups of 20 healthy young persons (22.1±1.7 years) and 12 healthy elderly persons (72.2±3.3 years). The physical properties of each sample were measured with a creep meter. The hardness of the tasty samples [sweet (saccharose), salty (NaCl), and sour (citric acid)] was a little higher than the samples without taste. The sensory evaluation at swallowing was assessed in respect of the LGSA concentration (hardness), taste and amount of the sample. The healthy young subjects reported that a 1.1% LGSA concentration, sweet taste, and 5.0 g amount, produced a sample that was pleasant in the oral cavity, facilitating swallowing. The healthy elderly subjects evaluated only a sweet taste, as facilitating swallowing. The results of the sensory evaluation and physical properties suggest that relative hardness (a 1.1% concentration of LGSA), sweet taste, and 5 g amount resulted in samples that were pleasant in the oral cavity, thus facilitating swallowing.

Journal

  • Journal of Home Economics of Japan

    Journal of Home Economics of Japan 60(2), 133-138, 2009-02-15

    The Japan Society of Home Economics

References:  25

Codes

  • NII Article ID (NAID)
    110007100335
  • NII NACSIS-CAT ID (NCID)
    AN10040097
  • Text Lang
    ENG
  • Article Type
    NOT
  • ISSN
    09135227
  • NDL Article ID
    9796458
  • NDL Source Classification
    ZE16(社会・労働--家事・家政--学術誌)
  • NDL Call No.
    Z6-113
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE  NDL-Digital 
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