• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Dietary Fiber in Vegetables. - Some Physicochemical and Functional Properties of Pectic Substances -.

Research Project

Project/Area Number 59480430
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 家政学
Research InstitutionTokyo University of Agriculture

Principal Investigator

KAWABATA Akiko  Faculty of Agriculture, Professor, 農学部, 教授 (30078133)

Co-Investigator(Kenkyū-buntansha) NAGASHIMA Nobuhiro  Faculty of Agriculture, Assistant, 農学部, 助手 (80142496)
SAWAYAMA Shigeru  Faculty of Agriculture, Lecture, 農学部, 講師 (00078213)
Project Period (FY) 1984 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1986: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1985: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1984: ¥4,400,000 (Direct Cost: ¥4,400,000)
Keywordsdietary fiber / pectic substances / weight-average molecular weight / radius of gyration / galacturonic acid / methoxyl groups / functional properties / イオン交換反応
Research Abstract

The dietary fiber in vegetables (carrot, turnip, Japanese radish and cabbage) and some of its physico-chemical and functional properties of pectic substances were investigated.
The results obtained were as follows:
1. Quantitative analysis of dietary fiber: Quantitative analysis of dietary fiber were conducted. The author used Kainuma's method in this study, wherein the samples were extracted based on the classification of carbohydrate, except in the analysis of pectic substances. Likewise, Kainuma's method was used in the analysis of pectic substances and we obtained satisfactory results.
2. Physico-chemical properties of pectic substances extracted under various pH: It was found that the methoxyl groups of galacturonic acid in carrots and turnips have higher values when extracted at low pH. The neutral sugar contents in pectic substances ranged from 3.0-7.5%. Among the neutral sugars detected, mannose was the highest content as compared to xylose, arabinose and fructose, in the order of diminishing content. The average molecular weight ( <M_w> ) was 16.2-18.9 X <10^4> for carrots, and 10.6 X <10^4> for carrots, and 10.6 X <10^4> for turnip. The radii of gyration ( <R_G> ) was 248-279 <Ang> for carrots and 214 <Ang> for turnip.
3. Functional properties of pectic substances: Concentration dependence of various ions were recognized through ion exchange reaction in pectic substances.
4. Future plans of study: 1) Quantitative analysis of dietary fiber and pectic substances in various kinds of vegetables. 2) Detailed investigations on the ion exchange reaction in the pectic substances.

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 澤山茂: 家政学雑誌. 35. 242-246 (1984)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 内村佳子: 家政学雑誌. 37. 431-437 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 澤山茂: 日本家政学会誌. 38. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Shigeru, Sawayama.: "Pectic Substances in Carrots and Turnips." Journal of Home Economics of Japan.35. 242-246 (1984)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Yoshiko Uchimura: "Free Sugars and Dietary Fiber of Celery." Journal of Home Economics of Japan.37. 431-437 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Shigeru, Sawayama.: "Dietary Fiber in Carrots and Turnips. - Some Properties of Pectic Substances by extraction under various pH-." Journal of Home Economics of Japan.38. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

URL: 

Published: 1987-03-31   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi