Fat Stability Tests on Autoxidation by the Conductometric Determination Method

Kato, Chihiro; Makabe, Kentaro; Katayama, Hitoshi; Kumita, Susumu; Takizawa, Yasuomi; Hara, Mamoru; Tanaka, Sinzi; Wanaka, Kou; Watanabe, Kenichi; Ohishi, Akio; Kojima, Kouichi; Toukairin, Shigeru

doi:10.5650/jos1956.42.55

Cited by 7 publications

(3 citation statements)

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“…The catalytic activity for the oxidation of organic materials was determined using the conductometric determination method (Metrohm E679; Rancimat System) [8][9][10]. One gram of the sample powder was mixed with 10 g of castor oil and heated to 120 jC while bubbling air at 0.5 dm 3 min À 1 , where the air was introduced into distilled water attached to an electric conductivity measurement cell.…”

Section: Evaluation Of Catalytic Activity For Oxidationmentioning

confidence: 99%

Synthesis and UV-shielding properties of calcia-doped ceria nanoparticles coated with amorphous silica

et al. 2004

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Section: Evaluation Of Catalytic Activity For Oxidationmentioning

confidence: 99%

Synthesis and UV-shielding properties of calcia-doped ceria nanoparticles coated with amorphous silica

et al. 2004

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“…Evaluation of oxidation catalytic activity: The catalytic activity for the oxidation of organic material was determined using the conductometric determination method (Rancimat System, Metrohm E679) [11][12][13]. One gram of the sample powder was mixed with 10 g of castor oil and heated to 120 • C while bubbling air at 0.5 dm 3 min −1 , where the air was introduced into distilled water attached to an electric conductivity measurement cell.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and UV-shielding properties of silica-coated calcia-doped ceria nanoparticles via soft solution processes

et al. 2006

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White nanoparticles of calcia-doped ceria were prepared from the precipitate by reacting CeCl 3 -CaCl 2 mixed solution with NaOH solution at pH 12 and the oxidation with hydrogen peroxide solution at 40 • C, followed by the calcination at 700 • C for 1 h. The sample before calcination contained significant amount of OH − in the lattice and was yellow, but the powders calcined above 700 • C were white, indicating that cation defect formed by replacing O 2− with OH − played as the color center. It is confirmed that calcia-doped ceria showed much lower photocatalytic activity as well as lower generation of singlet oxygen under UV light irradiation than those with titania and zinc oxide. Calcia-doped ceria particles were coated with amorphous silica by means of sol-gel reaction technique using hydrolysis of tetraethylorthosilicate (TEOS) or acid hydrolysis of sodium silicate. The silica coating by sol-gel reaction with TEOS was much more efficient for the reduction of catalytic activity of ceria for the oxidation of organic materials without loss of UV-shielding ability than that by acid hydrolysis of sodium silicate.

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“…The catalytic activity for the oxidation of organic material was determined using the conductometric determination method (Rancimat system, Metrohm E679) [13][14][15]. One gram of the sample powder was mixed with 10 g of castor oil and heated to 120 o C while bubbling air at 0.5 dm 3 •min -1 , where the air was introduced into distilled water attached to an electric conductivity measurement cell.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and Photochemical Properties of White Calcia-Doped Ceria Nanoparticles via Soft Solution Processes

Sato

El‐Toni

Yin

et al. 2006

Advances in Science and Technology

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White nanoparticles of calcia-doped ceria were prepared from the precipitate by reacting CeCl3-CaCl2 mixed solution with NaOH solution at pH 12 and the oxidation with hydrogen peroxide solution at 40oC, followed by the calcination at 700oC for 1 h. The sample before calcination contained significant amount of OH- in the lattice and was yellow, but the powders calcined above 700oC were white, indicating that cationic defect formed by replacing O2- with OH- played as the color center. Calcia-doped ceria particles were coated with amorphous silica by means of seeded polymerization technique using hydrolysis of tetraethylorthosilicate (TEOS) or acid hydrolysis of sodium silicate. The silica coating by seeded polymerization with TEOS was much more efficient for the reduction of catalytic activity of ceria for the oxidation of organic materials than that by acid hydrolysis of sodium silicate. It is confirmed that ceria particles caused far less damage to the DNA plasmids upon UV illumination than either the titania or the zinc oxide reference pigments.

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Fat Stability Tests on Autoxidation by the Conductometric Determination Method

Cited by 7 publications

References 0 publications

Synthesis and UV-shielding properties of calcia-doped ceria nanoparticles coated with amorphous silica

Synthesis and UV-shielding properties of calcia-doped ceria nanoparticles coated with amorphous silica

Synthesis and UV-shielding properties of silica-coated calcia-doped ceria nanoparticles via soft solution processes

Synthesis and Photochemical Properties of White Calcia-Doped Ceria Nanoparticles via Soft Solution Processes

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