Výsledky vyhledávání - "Masahiko, Numata"

Determination of Mogroside V in Luohanguo Extract for Daily Quality Control Operation Using Relative Molar Sensitivity to Single-Reference Caffeine

Autor: Hiroshi Matsufuji, Miho Kuroe, Yuzo Nishizaki, Masahiko Numata, Naoko Masumoto, Naoki Sugimoto, Kyoko Ishizuki, Kyoko Sato, Taichi Yamazaki, Takashi Ohtsuki

Publikováno v: Chemical and Pharmaceutical Bulletin. 69:18-25

Mogroside V is one of the characteristic and effective components of luohanguo extract, a food additive used as a sweetener in Japan as per Japan's Standards and Specifications for Food Additives (JSFA; 9th ed.). JSFA stipulates that the quantitative

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c2261351facbc6a43d950c344419f13
https://doi.org/10.1248/cpb.c20-00245

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Use of Relative Molar Sensitivity as a Specific Value for Evaluating Heptaoxyethylene Dodecyl Ether Concentrations in Methanol Solution

Autor: Yuzo Nishizaki, Nobuyasu Itoh, Masahiko Numata, Miho Kuroe, Naoki Sugimoto, Naoko Masumoto

Publikováno v: Analytical Sciences. 37:917-919

Relative molar sensitivity (RMS) determined using quantitative 1H NMR and HPLC with a refractive index (RI) detector was applied as a specific value for quantifying the levels of heptaoxyethylene dodecyl ether (HOEDE), a typical non-ionic surfactant,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb7b554741b5dd24fe8131cf517632c9
https://doi.org/10.2116/analsci.20n031

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Determination of perillaldehyde in perilla herbs using relative molar sensitivity to single-reference diphenyl sulfone

Autor: Miho Kuroe, Toshihide Ihara, Masahiko Numata, Yuzo Nishizaki, Naoki Sugimoto, Naoko Masumoto, Taichi Yamazaki, Yasushi Igarashi, Kaori Nakajima, Takeshi Maruyama, Kyoko Sato

Publikováno v: Journal of Natural Medicines. 73:566-576

Perillaldehyde (PRL) is one of the essential oil components derived from perilla plants (Perilla frutescens Britton) and is a characteristic compound of the traditional medicine "perilla herb ()" listed in the The Japanese Pharmacopoeia, 17th edition

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14e85c285c94206aa74fa40dd144f561
https://doi.org/10.1007/s11418-019-01306-7

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Relative molar sensitivities of carnosol and carnosic acid with respect to diphenylamine allow accurate quantification of antioxidants in rosemary extract

Autor: Yuzo Nishizaki, Toshihide Ihara, Naoko Masumoto, Taichi Yamazaki, Miho Kuroe, Masahiko Numata, Atsuko Tada, Naoki Sugimoto, Kyoko Sato, Kyoko Ishizuki, Kaori Nakajima

Publikováno v: Food Additives & Contaminants: Part A. 36:203-211

We have been developing a high-performance liquid chromatography/photodiode array (HPLC/PDA) employing relative molar sensitivities (RMSs) and adopted it to the accurate quantification of carnosol (CL) and carnosic acid (CA) which are the antioxidant

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fae6b63399749f92f7057e610c057d3d
https://doi.org/10.1080/19440049.2018.1556817

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Quantification of 23 Volatile Organic Compounds with a Single Reference Material Using Post-column Reaction Gas Chromatography Combined with a Stainless-steel Heating Furnace

Autor: Masahiko Numata, Nanako Sasaki, Mariko Morita, Tomohiro Sasaki, Hideaki Miyamoto, Naoki Saito, Toshihide Ihara, Yuko Kitamaki

Publikováno v: Analytical sciences : the international journal of the Japan Society for Analytical Chemistry. 37(8)

We built a heating furnace using stainless-steel instead of aluminum in gas chromatography combined with an oxidation/reduction system; it increased the oxidation temperature to 650°C. At 600°C, it completely oxidized five organochlorine compounds.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6ab442f32ebbbb59e6a8d7cf2ce6bb8
https://pubmed.ncbi.nlm.nih.gov/33551440

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Application of post-column reaction GC for accurate and direct determination of musty odor substances in standard solution

Autor: Naoki Saito, Yuko Kitamaki, Toshihide Ihara, Masahiko Numata

Publikováno v: Accreditation and Quality Assurance. 23:297-302

By using post-column reaction GC, a method for accurate and direct characterization of musty odor substances (2-methylisoborneol and geosmin) in a candidate standard solution has been developed. Because the GC system gives a response depending on the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::638b4f5ba605a4fca20358906f69574e
https://doi.org/10.1007/s00769-018-1338-4

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