Analysis of Water State and Gelation of Methylcellulose Thermo-reversible Hydrogels by Thermal Analysis and NMR

Nishimoto, Yuko; Eguchi, Hiroki; Shimoda, Eita; Suzuki, Toshiyuki

doi:10.2116/analsci.31.929

Cited by 9 publications

(2 citation statements)

References 28 publications

(33 reference statements)

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“…Therefore, if high-precision quantitativeness is added the NMR ability, it will be very effective not only in determining the structure of organic molecules, but also in the physicochemical property analysis of a system. [1][2][3][4][5][6][7][8] Futhermore, NMR can analyze solid-liquid coexistence systems (samples containing precipitates, agglutinates, sludge, etc.). 9 Moreover, since NMR can be observed in a very wide concentration range, pretreatment, such as dilution or concentration of the sample solution is not required.…”

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confidence: 99%

Quantitative NMR in Analytical Chemistry

Maki

2021

ANAL. SCI.

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confidence: 99%

Quantitative NMR in Analytical Chemistry

Maki

2021

ANAL. SCI.

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“…MC has gel formation ability, induced by hydrophobic interaction, and can adsorb alkali and alkaline earth metals [8]. It is thought that MC holds a gel formation with Cs stronger than with K because the hydrated ionic radius of Cs is smaller than that of K [9]. Therefore, it may be said that MC has the potential ability to adsorb selectively to Cs.…”

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Adsorptive Property of Food Materials and Chemicals to Cesium and Strontium

Uehara

Ishizuka

Shimamura

et al. 2017

Natural Product Communications

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In March, 2011, large amounts of radioactive materials were released from the Fukushima Daiichi nuclear power plant after the nuclear accident. Especially, for humans, internal exposure to 137 Cs and 90 Sr radionuclides presents very high risks because of their very long physical half-lives (137 Cs: 30.2 years, 90 Sr: 28.9 years). Therefore, it is important to inhibit the absorption of radioactive materials and to promote the excretion of them from the body through feces. The aim of this study was to explore foods, their components and various chemicals showing adsorption properties to Cs and Sr. Sodium alginate (ALA-Na) strongly adsorbed Cs and Sr compared with other samples. Chondroitin sulfate, carboxymethyl cellulose sodium (CMC-Na), methyl cellulose (MC) and apple polyphenols (AP; high molecule weight) also showed adsorption potency to Cs in that order. For Sr adsorption, kelp, CMC-Na, MC, AP (high molecule weight), laminaran and Jew's mallow exhibited adsorbing effects in that order. These samples might be useful and safe tools to protect from the adverse effects induced by internal exposure to these radioactive materials.

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Polysaccharides

Hatakeyama,

Hatakeyama

2024

Biomass With Culture and Geography

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Analysis of Water State and Gelation of Methylcellulose Thermo-reversible Hydrogels by Thermal Analysis and NMR

Cited by 9 publications

References 28 publications

Quantitative NMR in Analytical Chemistry

Quantitative NMR in Analytical Chemistry

Adsorptive Property of Food Materials and Chemicals to Cesium and Strontium

Polysaccharides

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