おごのり (Gracilaria confervoides) より寒天の製造に關する研究(第1報)

舟木 好右衞門; 小島 良夫

doi:10.2331/suisan.16.401

Studies on the Preparation of Agar-agar from Gracilaria confervoides (part 1)

Koemon FUNAKI, Yoshio KOJIMA

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JOURNAL FREE ACCESS

1951 Volume 16 Issue 9 Pages 401-404

DOI https://doi.org/10.2331/suisan.16.401

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Published: February 25, 1951 Received: - Available on J-STAGE: February 29, 2008 Accepted: July 07, 1950 Advance online publication: - Revised: -
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Date of correction: February 29, 2008 Reason for correction: - Correction: ABSTRACT Details: Wrong : Reviewing the chemical literature, the writers have been led to the conclusion that Rhodophceae contain the two varieties of colloidal matter, that is, sol-gel transformation is reversible according to the temperature (I) and not reversible (II) as follows:
R<^{O•SO₂•O} _{O•SO₂•O}>Me (I) R<^{O•SO₂•O} _{O•SO₂•O}>R′ (II)
As (I) and (II) are closely related in their chemical formulae, an attempt has been made for substituting one of succharide radicals (R′ and R) of (II) with Ca to obtain (I) from Gracilaria confervoides.
In this report, firstly general discussion of the probability taking place the reaction above mentioned, secondarily some experiments on the treatment of Gracilaria confervoides with alkaline solution and that containing Ca⁺⁺ are described.
The alkali treated Gr. confervoides contains ca. 50% of agar substance and that treated with alkaline solution ontaining Ca⁺⁺ shows the ca. 60% content of agar. Both may be used effectively as raw??aterial for making pure agar-agar.
Right : Reviewing the chemical literature, the writers have been led to the conclusion that Rhodophceae contain the two varieties of colloidal matter, that is, sol-gel transformation is reversible according to the temperature (I) and not reversible (II) as follows:
R<^{O•SO₂•O} _{O•SO₂•O}>Me (I) R<^{O•SO₂•O} _{O•SO₂•O}>R' (II)
As (I) and (II) are closely related in their chemical formulae, an attempt has been made for substituting one of succharide radicals (R' and R) of (II) with Ca to obtain (I) from Gracilaria confervoides.
In this report, firstly general discussion of the probability taking place the reaction above mentioned, secondarily some experiments on the treatment of Gracilaria confervoides with alkaline solution and that containing Ca⁺⁺ are described.
The alkali treated Gr. confervoides contains ca. 50% of agar substance and that treated with alkaline solution ontaining Ca⁺⁺ shows the ca. 60% content of agar. Both may be used effectively as raw??aterial for making pure agar-agar.

Date of correction: February 29, 2008 Reason for correction: - Correction: PDF FILE Details: -

Abstract

Reviewing the chemical literature, the writers have been led to the conclusion that Rhodophceae contain the two varieties of colloidal matter, that is, sol-gel transformation is reversible according to the temperature (I) and not reversible (II) as follows:
R<^{O•SO₂•O} _{O•SO₂•O}>Me (I) R<^{O•SO₂•O} _{O•SO₂•O}>R' (II)
As (I) and (II) are closely related in their chemical formulae, an attempt has been made for substituting one of succharide radicals (R' and R) of (II) with Ca to obtain (I) from Gracilaria confervoides.
In this report, firstly general discussion of the probability taking place the reaction above mentioned, secondarily some experiments on the treatment of Gracilaria confervoides with alkaline solution and that containing Ca⁺⁺ are described.
The alkali treated Gr. confervoides contains ca. 50% of agar substance and that treated with alkaline solution ontaining Ca⁺⁺ shows the ca. 60% content of agar. Both may be used effectively as raw??aterial for making pure agar-agar.

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