Performance information

• Distinct Solubilization Mechanisms of Medroxyprogesterone in Gemini Surfactant Micelles: A Comparative Study with Progesterone　　　　　　　　　　　　　　　
  Hiromichi Nakahara; Kazutaka Koga; Keisuke Matsuoka
  Molecules, Volume：29, Number：20, Oct. 2024, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.3390/molecules29204945
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85207674635&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85207674635&origin=inward
  DOI ID：10.3390/molecules29204945, eISSN：1420-3049, PubMed ID：39459313, SCOPUS ID：85207674635
• Solubilization of polycyclic aromatic compounds into supralong-chain surfactants with double quaternary ammonium micelles　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Rina Sekiguchi; Tomokazu Yoshimura; Hiromichi Nakahara; Kazutaka Koga
  Journal of Molecular Liquids, Volume：405, Jul. 2024, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.1016/j.molliq.2024.125109
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85194340088&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85194340088&origin=inward
  DOI ID：10.1016/j.molliq.2024.125109, ISSN：0167-7322, SCOPUS ID：85194340088
• Micelle formation of sodium taurolithocholate　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Rina Sekiguchi; Tomokazu Yoshimura
  Chemistry and Physics of Lipids, Volume：259, First page：105378, Last page：105378, Mar. 2024, [Reviewed]
  Elsevier BV, Scientific journal
  DOI：https://doi.org/10.1016/j.chemphyslip.2024.105378
  DOI ID：10.1016/j.chemphyslip.2024.105378, ISSN：0009-3084
• Solubilization of progesterone into Gemini surfactant solutions: 2D ROESY spectroscopy　　　　　　　　　　　　　　　
  Hiromichi Nakahara; Kazutaka Koga; Keisuke Matsuoka
  Journal of Molecular Liquids, Volume：395, Feb. 2024, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.1016/j.molliq.2023.123841
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85180969731&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85180969731&origin=inward
  DOI ID：10.1016/j.molliq.2023.123841, ISSN：0167-7322, SCOPUS ID：85180969731
• Micelle Formation of Dodecanoic Acid with Alkali Metal Counterions
  Keisuke Matsuoka; Aiko Sato; Yukino Ogawa; Kana Okazaki; Shiho Yada; Tomokazu Yoshimura
  Journal of Oleo Science, Volume：72, Number：9, First page：831, Last page：837, Jun. 2023, [Reviewed]
  Japan Oil Chemists' Society, Scientific journal
  DOI：https://doi.org/10.5650/jos.ess23086
  DOI ID：10.5650/jos.ess23086, ISSN：1345-8957, eISSN：1347-3352
• Preferential Removal of Alkali Metal Using Dodecanoic Acid and Sodium Dodecyl Sulfate in Foam Separation System.　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Daichi Asamoto
  Journal of oleo science, Volume：72, Number：5, First page：543, Last page：548, Feb. 2023, [Reviewed], ［Domestic magazine］
  The selectivity of adsorption between alkali metal ions (Li+, Na+, K+, Rb+, and Cs+) based on the ionic functional groups of the surfactants was studied using two types of surfactants, dodecanoic acid (DA) and sodium dodecyl sulfate (SDS), in the foam separation system. The results showed that Li+ was preferably removed by foam separation using DA. The removal rates of other alkali metal ions were relatively low, and there were no significant differences among other alkali metal ions (Na+, K+, Rb+, and Cs+). However, Cs+ exhibited the highest removal rate among the mixed alkali metals by foam separation using SDS. From these results, the selectivity of the alkali metal in foam separation was dependent on the type of surfactant.
  English, Scientific journal
  DOI：https://doi.org/10.5650/jos.ess22422
  DOI ID：10.5650/jos.ess22422, PubMed ID：37121679
• Removal of ionic dyes with different charges by foam separation　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Yui Sato; Sumire Takashima; Yusuke Goto
  Journal of Molecular Liquids, Volume：355, First page：118994, Last page：118994, Jun. 2022, [Reviewed]
  Elsevier BV, Scientific journal
  DOI：https://doi.org/10.1016/j.molliq.2022.118994
  DOI ID：10.1016/j.molliq.2022.118994, ISSN：0167-7322
• Vesicle formation of disodium lauryl sulfosuccinate　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Nanami Noshiro; Hikaru Kuroki; Kohta Tsuyuzaki; Goro Hashimoto
  Journal of Molecular Liquids, Volume：348, First page：118422, Last page：118422, Feb. 2022, [Reviewed]
  Elsevier BV, Scientific journal
  DOI：https://doi.org/10.1016/j.molliq.2021.118422
  DOI ID：10.1016/j.molliq.2021.118422, ISSN：0167-7322
• Solubilization of fullerene in polyoxyethylene tetradecyl ether type nonionic surfactants　　　　　　　　　　　　　　　
  Hikaru Kuroki; Erika Aida; Takuya Komine; Keisuke Matsuoka
  Journal of Molecular Liquids, Volume：335, Aug. 2021, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.1016/j.molliq.2021.116236
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85105693362&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85105693362&origin=inward
  DOI ID：10.1016/j.molliq.2021.116236, ISSN：0167-7322, SCOPUS ID：85105693362
• Removal of period 4 transition metals by foam separation　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Nana Yamaguchi
  JOURNAL OF MOLECULAR LIQUIDS, Volume：325, Mar. 2021, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.molliq.2020.115185
  DOI ID：10.1016/j.molliq.2020.115185, ISSN：0167-7322, eISSN：1873-3166, Web of Science ID：WOS:000636695200104
• Micelle Formation of Monoammonium Glycyrrhizinate　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Mamoru Arima; Yusuke Goto; Shiho Yada; Tomokazu Yoshimura
  JOURNAL OF OLEO SCIENCE, Volume：70, Number：7, First page：911, Last page：918, 2021, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.5650/jos.ess21046
  DOI ID：10.5650/jos.ess21046, ISSN：1345-8957, eISSN：1347-3352, Web of Science ID：WOS:000670011000004
• Foam Separation of Dyes Using Anionic, Cationic, and Amphoteric Surfactants.　　　　　　　　　　　　　　　
  Yusuke Goto; Yuya Nema; Keisuke Matsuoka
  Journal of oleo science, Volume：69, Number：6, First page：549, Last page：555, 2020, [Reviewed], ［Domestic magazine］
  Foam separation can selectively remove a target substance from a solution via adsorption of the substance with the surfactant at the surface of the bubble. A cationic dye, methylene blue, and an anionic dye, Fast Green FCF, were prepared as substances to be removed via foam separation. Anionic (sodium dodecyl sulfate, SDS), cationic (dodecyltrimethylammonium chloride, DTAC), and amphoteric (3-(dodecyldimethylammonio)propane-1-sulfonate, SB-12) surfactants were used in the foam separation process. The effectiveness of the surfactants for removing the cationic methylene blue increased as follows: DTAC < SB-12 < SDS. On the other hand, the effectiveness of the surfactants for removing the anionic Fast Green FCF was in the opposite order. The dyes were effectively adsorbed by the foams via electrostatic interactions between the oppositely charged surfactant and the dye molecules. Since amphoteric surfactants have both anionic and cationic charges in a molecule, they could effectively remove both dyes in the foam separation process. Therefore, it was found that the amphoteric surfactant was highly versatile. Analysis of the kinetics of the removal rate showed that the aqueous solutions of monomers could remove the dyes more effectively than micellar solutions in foam separation.
  English, Scientific journal
  DOI：https://doi.org/10.5650/jos.ess20004
  DOI ID：10.5650/jos.ess20004, PubMed ID：32522916
• Removal of Zwitterionic Rhodamine B Using Foam Separation.　　　　　　　　　　　　　　　
  Yusuke Goto; Yuya Nema; Keisuke Matsuoka
  Journal of oleo science, Volume：69, Number：6, First page：563, Last page：567, 2020, [Reviewed], ［Domestic magazine］
  Foam separation promotes the removal of dissolved materials from solutions by adsorbing the molecules onto a surfactant. The zwitterion of rhodamine B was removed by using both anionic (sodium dodecyl sulfate: SDS) and cationic (dodecyltrimethylammonium chloride: DTAC) surfactants through foam separation. However, rhodamine B could not be removed from a strongly acidic DTAC solution (pH 2), because the molecular form changes from the zwitterion to cation. Moreover, the cationic dye of rhodamine 6G could not be removed from the DTAC solution. Therefore, these results demonstrate that the electrostatic interaction between a surfactant and target ion is an important factor in foam separation.
  English, Scientific journal
  DOI：https://doi.org/10.5650/jos.ess20005
  DOI ID：10.5650/jos.ess20005, PubMed ID：32522917
• Application of foam separation method for removal of alkaline earth metal ions from solution
  Keisuke Matsuoka; Satomi Hasegawa; Taiyo Yuma; Yusuke Goto
  Journal of Molecular Liquids, Volume：294, Nov. 2019, [Reviewed]
  DOI：https://doi.org/10.1016/j.molliq.2019.111663
  DOI ID：10.1016/j.molliq.2019.111663, ISSN：0167-7322, SCOPUS ID：85071718760
• Solubilization ability of star-shaped trimeric quaternary ammonium bromide surfactant
  Keisuke Matsuoka; Naohiro Takahashi; S. Yada; Tomokazu Yoshimura
  Journal of Molecular Liquids, Volume：291, Oct. 2019, [Reviewed]
  DOI：https://doi.org/10.1016/j.molliq.2019.111254
  DOI ID：10.1016/j.molliq.2019.111254, ISSN：0167-7322, SCOPUS ID：85068251951
• Superoxide Scavenging Activity of Gold, Silver, and Platinum Nanoparticles Capped with Sugar-based Nonionic Surfactants　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Yuka Nakatani; Tomokazu Yoshimura; Tsubasa Akasaki
  Journal of oleo science, Volume：68, First page：847, Last page：854, Sep. 2019, [Reviewed]
  DOI：https://doi.org/10.5650/jos.ess19079
  DOI ID：10.5650/jos.ess19079, PubMed ID：31484901, SCOPUS ID：85071739601
• Emulsification, solubilization, and detergency behaviors of homogeneous polyoxypropylene-polyoxyethylene alkyl ether type nonionic surfactants　　　　　　　　　　　　　　　
  Yada Shiho; Matsuoka Keisuke; Kanasaki Yu Nagai; Gotoh Keiko; Yoshimura Tomokazu
  COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, Volume：564, First page：51, Last page：58, Mar. 2019, [Reviewed]
  DOI：https://doi.org/10.1016/j.colsurfa.2018.12.030
  DOI ID：10.1016/j.colsurfa.2018.12.030, ISSN：0927-7757, Web of Science ID：WOS:000455389200006
• Removal of alkali metal ions from aqueous solution by foam separation method　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Hiroaki Miura; Shiho Karima; Chiharu Taketaka; Shota Ouno; Yoshikiyo Moroi
  Journal of Molecular Liquids, Volume：263, First page：89, Last page：95, Aug. 2018, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.molliq.2018.04.136
  DOI ID：10.1016/j.molliq.2018.04.136, ISSN：0167-7322, SCOPUS ID：85046779753, Web of Science ID：WOS:000436911300011
• Solubilization ability of N,N-dimethyl-N-alkyladamantylammonium bromide　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Rinpei Omori; Shiho Yada; Tomokazu Yoshimura; Hiroki Iwase
  Journal of Molecular Liquids, Volume：260, First page：131, Last page：137, Jun. 2018, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.molliq.2018.03.078
  DOI ID：10.1016/j.molliq.2018.03.078, ISSN：0167-7322, SCOPUS ID：85044527704, Web of Science ID：WOS:000433645500013
• Study on Micelle Formation of Bile Salt Using Nuclear Magnetic Resonance Spectroscopy　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Atsushi Yamamoto
  JOURNAL OF OLEO SCIENCE, Volume：66, Number：10, First page：1129, Last page：1137, Oct. 2017, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.5650/jos.ess17063
  DOI ID：10.5650/jos.ess17063, ISSN：1345-8957, eISSN：1347-3352, Web of Science ID：WOS:000412263900007
• Role of the spacer of Gemini surfactants in solubilization into their micelles　　　　　　　　　　　　　　　
  Hiromichi Nakahara; Hiroaki Nishizaka; Kensuke Iwasaki; Yu Otsuji; Mika Sato; Keisuke Matsuoka; Osamu Shibata
  JOURNAL OF MOLECULAR LIQUIDS, Volume：244, First page：499, Last page：505, Oct. 2017, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.molliq.2017.09.014
  DOI ID：10.1016/j.molliq.2017.09.014, ISSN：0167-7322, eISSN：1873-3166, Web of Science ID：WOS:000413391000057
• Aggregate Formation of Glycyrrhetic Acid 3-O-Glucuronide　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Ryusuke Miyajima; Seigo Karasawa
  JOURNAL OF SURFACTANTS AND DETERGENTS, Volume：20, Number：5, First page：1153, Last page：1159, Sep. 2017, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s11743-017-2001-5
  DOI ID：10.1007/s11743-017-2001-5, ISSN：1097-3958, eISSN：1558-9293, Web of Science ID：WOS:000407391500016
• Single-alkyl and multi-alkyl chain-containing amphiphilic oligomers with several sugar side chains: solution properties and nanostructural analysis of aggregates by SANS　　　　　　　　　　　　　　　
  Tomokazu Yoshimura; Yuka Nakatani; Keisuke Matsuoka; Kazuhiro Akutsu; Hiroki Iwase
  COLLOID AND POLYMER SCIENCE, Volume：295, Number：5, First page：793, Last page：802, May 2017, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s00396-017-4063-3
  DOI ID：10.1007/s00396-017-4063-3, ISSN：0303-402X, eISSN：1435-1536, Web of Science ID：WOS:000399706800007
• Synthesis and Solution Properties of Adamantane-Containing Quaternary Ammonium Salt-type Cationic Surfactants: Hydrocarbon-based, Fluorocarbon-based and Bola-type　　　　　　　　　　　　　　　
  Tomokazu Yoshimura; Mari Okada; Keisuke Matsuoka
  JOURNAL OF OLEO SCIENCE, Volume：65, Number：10, First page：843, Last page：852, Oct. 2016, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.5650/jos.ess16095
  DOI ID：10.5650/jos.ess16095, ISSN：1345-8957, eISSN：1347-3352, Web of Science ID：WOS:000384705400005
• Aggregate formation of glycyrrhizic acid　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Ryusuke Miyajima; Yudai Ishida; Seigo Karasawa; Tomokazu Yoshimura
  COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, Volume：500, First page：112, Last page：117, Jul. 2016, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.colsurfa.2016.04.032
  DOI ID：10.1016/j.colsurfa.2016.04.032, ISSN：0927-7757, eISSN：1873-4359, Web of Science ID：WOS:000375860100014
• Competitive Solubilization of Cholesterol/Cholesteryl Oleate and Seven Species of Sterol/Stanol in Model Intestinal Solution System　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Asumi Kase; Takashi Matsuo; Yusuke Ashida
  JOURNAL OF OLEO SCIENCE, Volume：64, Number：7, First page：783, Last page：791, Jul. 2015, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.5650/jos.ess15044
  DOI ID：10.5650/jos.ess15044, ISSN：1345-8957, eISSN：1347-3352, Web of Science ID：WOS:000357348400011
• Solubilization of naphthalene and octafluoronaphthalene in ionic hydrocarbon and fluorocarbon surfactants　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Rika Yamashita; Miki Ichinose; Maiko Kondo; Tomokazu Yoshimura
  COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, Volume：456, First page：83, Last page：91, Aug. 2014, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.colsurfa.2014.04.060
  DOI ID：10.1016/j.colsurfa.2014.04.060, ISSN：0927-7757, eISSN：1873-4359, Web of Science ID：WOS:000340318000012
• Solubilization of polycyclic aromatic hydrocarbons in C16E7 nonionic surfactant solutions　　　　　　　　　　　　　　　
  Emi Takeuchi; Keisuke Matsuoka; Shigeaki Ishii; Sho Ishikawa; Chikako Honda; Kazutoyo Endo
  COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, Volume：441, First page：133, Last page：139, Jan. 2014, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.colsurfa.2013.09.011
  DOI ID：10.1016/j.colsurfa.2013.09.011, ISSN：0927-7757, eISSN：1873-4359, Web of Science ID：WOS:000329260800018
• Micelle formation of sodium hyodeoxycholate　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Kaede Takagi; Chikako Honda
  Chemistry and Physics of Lipids, Volume：172-173, First page：6, Last page：13, 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.chemphyslip.2013.04.003
  DOI ID：10.1016/j.chemphyslip.2013.04.003, ISSN：1873-2941, SCOPUS ID：84878148253, Web of Science ID：WOS:000322415100002
• Aggregation properties of supralong-chain surfactants with double or triple quaternary ammonium head groups　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Nagisa Chiba; Tomokazu Yoshimura
  JOURNAL OF COLLOID AND INTERFACE SCIENCE, Volume：379, First page：72, Last page：77, Aug. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.jcis.2012.04.043
  DOI ID：10.1016/j.jcis.2012.04.043, ISSN：0021-9797, Web of Science ID：WOS:000305592000011
• Supra-long chain surfactants with double or triple quaternary ammonium headgroups　　　　　　　　　　　　　　　
  Tomokazu Yoshimura; Nagisa Chiba; Keisuke Matsuoka
  JOURNAL OF COLLOID AND INTERFACE SCIENCE, Volume：374, First page：157, Last page：163, May 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.jcis.2012.01.033
  DOI ID：10.1016/j.jcis.2012.01.033, ISSN：0021-9797, Web of Science ID：WOS:000302446900022
• Competitive solubilization of cholesterol and beta-sitosterol with changing biliary lipid compositions in model intestinal solution　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Ebisawa Rie; Saori Yui; Chikako Honda; Kazutoyo Endo
  CHEMISTRY AND PHYSICS OF LIPIDS, Volume：165, Number：1, First page：7, Last page：14, Jan. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.chemphyslip.2011.10.004
  DOI ID：10.1016/j.chemphyslip.2011.10.004, ISSN：0009-3084, Web of Science ID：WOS:000299580000002
• Biliary excretion of essential trace elements in rats under oxidative stress caused by selenium deficiency　　　　　　　　　　　　　　　
  Kosuke Yamasaki; Yasunobu Sakuma; Junya Sasaki; Ken-ichiro Matsumoto; Kazunori Anzai; Keisuke Matsuoka; Chikako Honda; Masamichi Tsukada; Kazutoyo Endo; Shuichi Enomoto
  ANALYTICAL AND BIOANALYTICAL CHEMISTRY, Volume：401, Number：8, First page：2531, Last page：2538, Nov. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s00216-011-5333-4
  DOI ID：10.1007/s00216-011-5333-4, ISSN：1618-2642, Web of Science ID：WOS:000295508600021
• Effect of double quaternary ammonium groups on micelle formation of partially fluorinated surfactant　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Nagisa Chiba; Tomokazu Yoshimura; Emi Takeuchi
  JOURNAL OF COLLOID AND INTERFACE SCIENCE, Volume：356, Number：2, First page：624, Last page：629, Apr. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.jcis.2011.01.030
  DOI ID：10.1016/j.jcis.2011.01.030, ISSN：0021-9797, Web of Science ID：WOS:000288527800032
• Competitive solubilization of cholesterol and six species of sterol/stanol in bile salt micelles　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Eriko Kajimoto; Maho Horiuchi; Chikako Honda; Kazutoyo Endo
  CHEMISTRY AND PHYSICS OF LIPIDS, Volume：163, Number：4-5, First page：397, Last page：402, May 2010, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.chemphyslip.2010.03.006
  DOI ID：10.1016/j.chemphyslip.2010.03.006, ISSN：0009-3084, eISSN：1873-2941, Web of Science ID：WOS:000278169400010
• Micellization of bile salts and solubilization into the micelles　　　　　　　　　　　　　　　
  Matsuoka, Keisuke; Lee, Jungno; Moroi, Yoshikiyo
  Journal of Surface Science and Technology, Volume：26, First page：105, Last page：136, 2010, [Reviewed]
  English, Scientific journal
• Surface properties and aggregate morphology of partially fluorinated carboxylate-type anionic gemini surfactants　　　　　　　　　　　　　　　
  Tomokazu Yoshimura; Miri Bong; Keisuke Matsuoka; Chikako Honda; Kazutoyo Endo
  JOURNAL OF COLLOID AND INTERFACE SCIENCE, Volume：339, Number：1, First page：230, Last page：235, Nov. 2009, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.jcis.2009.07.054
  DOI ID：10.1016/j.jcis.2009.07.054, ISSN：0021-9797, Web of Science ID：WOS:000272262900029
• Solubilization of n-alkylbenzene and n-perfluoroalkylbenzene in hydrogenated and fluorinated surfactants micelles　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Emi Takeuchi; Megumi Takahashi; Satomi Kitsugi; Chikako Honda; Kazutoyo Endo
  JOURNAL OF COLLOID AND INTERFACE SCIENCE, Volume：333, Number：2, First page：641, Last page：645, May 2009, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.jcis.2009.02.009
  DOI ID：10.1016/j.jcis.2009.02.009, ISSN：0021-9797, Web of Science ID：WOS:000265121500029
• Dynamics of redox related elements (Fe, Co, Zn, and Se) and oxidative stress caused by Se-deficiency in rats　　　　　　　　　　　　　　　
  Y. Sakuma; K. Matsuoka; C. Honda; K. Matsumoto; K. Endo
  JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, Volume：278, Number：3, First page：591, Last page：594, Dec. 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s10967-008-1011-1
  DOI ID：10.1007/s10967-008-1011-1, ISSN：0236-5731, Web of Science ID：WOS:000261262500011
• Study of thermodynamic parameters for solubilization of plant sterol and stanol in bile salt micelles　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Tomomi Nakazawa; Ai Nakamura; Chikako Honda; Kazutoyo Endo; Masamichi Tsukada
  CHEMISTRY AND PHYSICS OF LIPIDS, Volume：154, Number：2, First page：87, Last page：93, Aug. 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.chemphyslip.2008.05.002
  DOI ID：10.1016/j.chemphyslip.2008.05.002, ISSN：0009-3084, eISSN：1873-2941, Web of Science ID：WOS:000258369200002
• Nanocage aggregates composed of bilayer sheets　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Tomokazu Yoshimura; Miri Bong; Chikako Honda; Kazutoyo Endo
  LANGMUIR, Volume：24, Number：11, First page：5676, Last page：5678, Jun. 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/la800618v
  DOI ID：10.1021/la800618v, ISSN：0743-7463, Web of Science ID：WOS:000256232900010
• Indomethacin solubilization induced shape transition in CnE7 (n=14,16) nonionic micelles　　　　　　　　　　　　　　　
  Shigeaki Ishii; Sho Ishikawa; Nozomi Mizuno; Keisuke Matsuoka; Chikako Honda; Kazutoyo Endo
  JOURNAL OF COLLOID AND INTERFACE SCIENCE, Volume：317, Number：1, First page：115, Last page：120, Jan. 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.jcis.2007.09.021
  DOI ID：10.1016/j.jcis.2007.09.021, ISSN：0021-9797, Web of Science ID：WOS:000251283100014
• NMR study on solubilization of sterols and aromatic compounds in sodium taurodeoxycholate micelles　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Shigeaki Ishii; Chikako Honda; Kazutoyo Endo; Akio Saito; Yoshikiyo Moroi; Osamu Shibata
  BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, Volume：80, Number：12, First page：2334, Last page：2341, Dec. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1246/bcsj.80.2334
  DOI ID：10.1246/bcsj.80.2334, ISSN：0009-2673, eISSN：1348-0634, Web of Science ID：WOS:000252141000009
• Molecular aggregates of partially fluorinated quaternary ammonium salt gemini surfactants　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Tomokazu Yoshimura; Takashi Shikimoto; Juri Hamada; Mika Yamawaki; Chikako Honda; Kazutoyo Endo
  LANGMUIR, Volume：23, Number：22, First page：10990, Last page：10994, Oct. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/la701525c
  DOI ID：10.1021/la701525c, ISSN：0743-7463, Web of Science ID：WOS:000250228100023
• Changes in the components of biliary and plasma lipids in selenium-deficient rats　　　　　　　　　　　　　　　
  Yasunobu Sakuma; Junya Sasaki; Aya Futami; Kousuke Yamasaki; Keisuke Matsuoka; Chikako Honda; Kazutoyo Endo; Masarnichi Tsukada
  CHEMISTRY AND PHYSICS OF LIPIDS, Volume：148, Number：2, First page：70, Last page：76, Aug. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.chemphyslip.2007.04.005
  DOI ID：10.1016/j.chemphyslip.2007.04.005, ISSN：0009-3084, Web of Science ID：WOS:000248433600003
• Thermodynamic study on competitive solubilization of cholesterol and P-sitosterol in bile salt micelles　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Takashi Hirosawa; Chikako Honda; Kazutoyo Endo; Yoshikiyo Moroi; Osamu Shibata
  CHEMISTRY AND PHYSICS OF LIPIDS, Volume：148, Number：1, First page：51, Last page：60, Jul. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.chemphyslip.2007.04.007
  DOI ID：10.1016/j.chemphyslip.2007.04.007, ISSN：0009-3084, Web of Science ID：WOS:000248174500003
• Aggregate structure of N-(perfluoroalkylmethyl)-N,N,N-trimethylammonium chloride by transmission electron microscopy　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Mariko Ishii; Aki Yonekawa; Chikako Honda; Kazutoyo Endo; Yoshikiyo Moroi; Yutaka Abe; Takamitsu Tamura
  BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, Volume：80, Number：6, First page：1129, Last page：1131, Jun. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1246/bcsj.80.1129
  DOI ID：10.1246/bcsj.80.1129, ISSN：0009-2673, eISSN：1348-0634, Web of Science ID：WOS:000248256600011
• Antibacterial activity of long-chain fatty alcohols against Staphylococcus aureus　　　　　　　　　　　　　　　
  Naoko Togashi; Akiko Shiraishi; Miki Nishizaka; Keisuke Matsuoka; Kazutoyo Endo; Hajime Hamashima; Yoshihiro Inoue
  MOLECULES, Volume：12, Number：2, First page：139, Last page：148, Feb. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.3390/12020139
  DOI ID：10.3390/12020139, ISSN：1420-3049, Web of Science ID：WOS:000244767600002
• Micellar size, shape and counterion binding of N-(1,1-Dihydroperfluoroalkyl)-N,N,N-trimethylammonium chloride in aqueous solutions　　　　　　　　　　　　　　　
  Keisuke Matsuoka; Aki Yonekawa; Mariko Ishii; Chikako Honda; Kazutoyo Endo; Yoshikiyo Moroi; Yutaka Abe; Takamitsu Tamura
  COLLOID AND POLYMER SCIENCE, Volume：285, Number：3, First page：323, Last page：330, Dec. 2006, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s00396-006-1574-8
  DOI ID：10.1007/s00396-006-1574-8, ISSN：0303-402X, Web of Science ID：WOS:000242146000008
• Temperature dependence of pyrene fluorescence spectra in aqueous solutions of CnEm (C14E7, C16E7, and C16E6) nonionic surfactant micelles　　　　　　　　　　　　　　　
  Chikako Honda; Yumi Katsumata; Risa Yasutome; Sanae Yamazaki; Shigeaki Ishii; Keisuke Matsuoka; Kazutoyo Endo
  JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, Volume：182, Number：2, First page：151, Last page：157, Aug. 2006, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.jphotochem.2006.02.003
  DOI ID：10.1016/j.jphotochem.2006.02.003, ISSN：1010-6030, Web of Science ID：WOS:000239874600005
• Micellization of conjugated chenodeoxy- and ursodeoxycholates and solubilization of cholesterol into their micelles: comparison with other four conjugated bile salts species　　　　　　　　　　　　　　　
  K Matsuoka; M Suzuki; C Honda; K Endo; Y Moroi
  CHEMISTRY AND PHYSICS OF LIPIDS, Volume：139, Number：1, First page：1, Last page：10, Jan. 2006, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.chemphyslip.2005.08.006
  DOI ID：10.1016/j.chemphyslip.2005.08.006, ISSN：0009-3084, PubMed ID：16256096, Web of Science ID：WOS:000234822000001
• Spontaneous membrane fusion induced by chemical formation of ceramides in a lipid bilayer　　　　　　　　　　　　　　　
  Kunishima, Munetaka; Tokaji, Masafumi; Matsuoka, Keisuke; Nishida, Jin; Kanamori, Masanori; Hioki, Kazuhito; Tani, Shohei
  Journal of the American Chemical Society, Volume：128, Number：45, First page：14452, Last page：14453, 2006, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.1021/ja0652969
  DOI ID：10.1021/ja0652969, ISSN：0002-7863, ORCID：42933560, PubMed ID：17090016, Web of Science ID：WOS:000241857200018
• Micelle formation and surface adsorption of octaethylene glycol monoalkyl ether (CnE8)　　　　　　　　　　　　　　　
  M Rusdi; Y Moroi; T Hlaing; K Matsuoka
  BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, Volume：78, Number：4, First page：604, Last page：610, Apr. 2005
  English, Scientific journal
  DOI：https://doi.org/10.1246/bcsj.78.604
  DOI ID：10.1246/bcsj.78.604, ISSN：0009-2673, eISSN：1348-0634, SCOPUS ID：18744387421, Web of Science ID：WOS:000228912900006
• Micelle formation and surface adsorption of octaethylene glycol monoalkyl ether (CnE8)　　　　　　　　　　　　　　　
  M Rusdi; Y Moroi; T Hlaing; K Matsuoka
  BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, Volume：78, Number：4, First page：604, Last page：610, Apr. 2005, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1246/bcsj.78.604
  DOI ID：10.1246/bcsj.78.604, ISSN：0009-2673, eISSN：1348-0634, Web of Science ID：WOS:000228912900006
• O/W emulsion of n-alkylbenzene/ionic surfactant/water systems　　　　　　　　　　　　　　　
  Y Doi; Y Kawashima; K Matsuoka; Y Moroi
  JOURNAL OF PHYSICAL CHEMISTRY B, Volume：108, Number：8, First page：2594, Last page：2599, Feb. 2004, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jp0304879
  DOI ID：10.1021/jp0304879, ISSN：1520-6106, Web of Science ID：WOS:000189152000016
• Characteristics of conjugate bile salt-phosphatidylcholine-cholesterol-water systems　　　　　　　　　　　　　　　
  K Matsuoka; M Maeda; Y Moroi
  COLLOIDS AND SURFACES B-BIOINTERFACES, Volume：33, Number：2, First page：101, Last page：109, Jan. 2004, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.colsurfb.2003.09.002
  DOI ID：10.1016/j.colsurfb.2003.09.002, ISSN：0927-7765, Web of Science ID：WOS:000188863300005
• Micelle formation of sodium chenodeoxycholate and solubilization into the micelles: comparison with other unconjugated bile salts　　　　　　　　　　　　　　　
  R Ninomiya; K Matsuoka; Y Moroi
  BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR AND CELL BIOLOGY OF LIPIDS, Volume：1634, Number：3, First page：116, Last page：125, Nov. 2003, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.bbalip.2003.09.003
  DOI ID：10.1016/j.bbalip.2003.09.003, ISSN：1388-1981, Web of Science ID：WOS:000186987500007
• Micelle formation of sodium chenodeoxycholate and solubilization into the micelles: comparison with other unconjugated bile salts.　　　　　　　　　　　　　　　
  Ninomiya R; Matsuoka K; Moroi Y
  Biochimica et biophysica acta, Volume：1634, Number：3, First page：116, Last page：125, Nov. 2003, [Reviewed]
  DOI：https://doi.org/10.1016/j.bbalip.2003.09.003
  DOI ID：10.1016/j.bbalip.2003.09.003, ISSN：0006-3002, PubMed ID：14643799
• Micelle formation of sodium glyco- and taurocholates and sodium glyco- and taurodeoxycholates and solubilization of cholesterol into their micelles　　　　　　　　　　　　　　　
  K Matsuoka; M Maeda; Y Moroi
  COLLOIDS AND SURFACES B-BIOINTERFACES, Volume：32, Number：2, First page：87, Last page：95, Oct. 2003, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/S0927-7765(03)00148-6
  DOI ID：10.1016/S0927-7765(03)00148-6, ISSN：0927-7765, Web of Science ID：WOS:000185549100001
• Micellization of fluorinated amphiphiles　　　　　　　　　　　　　　　
  K Matsuoka; Y Moroi
  CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, Volume：8, Number：3, First page：227, Last page：235, Aug. 2003, [Reviewed]
  English
  DOI：https://doi.org/10.1016/S1359-0294(03)00056-6
  DOI ID：10.1016/S1359-0294(03)00056-6, ISSN：1359-0294, Web of Science ID：WOS:000184757000004
• Temperature effect on formation of sodium cholate micelles　　　　　　　　　　　　　　　
  H Sugioka; K Matsuoka; Y Moroi
  JOURNAL OF COLLOID AND INTERFACE SCIENCE, Volume：259, Number：1, First page：156, Last page：162, Mar. 2003, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/S0021-9797(02)00191-1
  DOI ID：10.1016/S0021-9797(02)00191-1, ISSN：0021-9797, PubMed ID：12651144, Web of Science ID：WOS:000181864700017
• Micelle formation of sodium deoxycholate and sodium ursodeoxycholate (Part 1)　　　　　　　　　　　　　　　
  K Matsuoka; Y Moroi
  BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR AND CELL BIOLOGY OF LIPIDS, Volume：1580, Number：2-3, First page：189, Last page：199, Feb. 2002, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/S1388-1981(01)00203-7
  DOI ID：10.1016/S1388-1981(01)00203-7, ISSN：1388-1981, PubMed ID：11880243, Web of Science ID：WOS:000174494600009
• Solubilization of cholesterol and polycyclic aromatic compounds into sodium bile salt micelles (Part 2)　　　　　　　　　　　　　　　
  K Matsuoka; Y Kuranaga; Y Moroi
  BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR AND CELL BIOLOGY OF LIPIDS, Volume：1580, Number：2-3, First page：200, Last page：214, Feb. 2002, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/S1388-1981(01)00204-9
  DOI ID：10.1016/S1388-1981(01)00204-9, ISSN：1388-1981, PubMed ID：11880244, Web of Science ID：WOS:000174494600010
• Micelle formation of n-decyltrimethylammonium perfluorocarboxylates　　　　　　　　　　　　　　　
  N Yoshida; K Matsuoka; Y Moroi
  JOURNAL OF COLLOID AND INTERFACE SCIENCE, Volume：187, Number：2, First page：388, Last page：395, Mar. 1997, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1006/jcis.1996.4691
  DOI ID：10.1006/jcis.1996.4691, ISSN：0021-9797, Web of Science ID：WOS:A1997WQ33200014
• ELECTRIC-CONDUCTIVITY ANALYSIS OF MICELLAR SOLUTION OF SODIUM DODECYL-SULFATE　　　　　　　　　　　　　　　
  Y MOROI; K MATSUOKA
  BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, Volume：67, Number：8, First page：2057, Last page：2061, Aug. 1994, [Reviewed]
  English, Scientific journal
  ISSN：0009-2673, eISSN：1348-0634, Web of Science ID：WOS:A1994PG24200010
• Thermodynamics of micelle formation of 1-dodecanesulfonic acid
  Keisuke Matsuoka; Yoshikiyo Moroi; Masahiko Saito
  Journal of Physical Chemistry, Volume：97, First page：13006, Last page：13010, Jan. 1993, [Reviewed]
  The critical micelle concentrations (cmc's) of 1-dodecanesulfonic acid in aqueous solution were precisely determined over the temperature range 278.2-323.2 K by an electrical conductivity method. The degrees of counterion binding to micelle were obtained over the above temperature range by cmc change with total counterion concentration. Molecular weights of micelles were determined by static light scattering. Activity change of the counterion H+ with total surfactant concentration was estimated by pH values of the solutions. The mass action model was applied to the micelle formation in order to enumerate the three micellization parameters from these values: micellization constant, micelle aggregation number, and the number of counterions per micelle. Thermodynamic parameters (ΔG°, ΔH°, ΔS°) of micelle formation were then calculated from the temperature change of these parameters. At lower temperatures, the micellization was found to be entropy-driven, while at higher temperatures it was enthalpy-driven. The micellization parameters also made it possible to evaluate the concentration change of every chemical species with total surfactant concentration, and the total conductivity was divided into the contribution of each chemical species. The activity coefficient of the counterion started to increase above the cmc due to its excess concentration in the intermicellar bulk phase. ? 1993 American Chemical Society.
  DOI：https://doi.org/10.1021/j100151a059
  DOI ID：10.1021/j100151a059

• 泡沫分離による水溶液からの物質の除去—Removal of Materials from Aqueous Solution by Foam Separation—特集 泡の最新研究動向 : 構造・性能・機能の応用　　　　　　　　　　　　　　　
  松岡 圭介
  Volume：24, Number：7, First page：305, Last page：310, Jul. 2024
  Japanese
  ISSN：1345-8949, CiNii Books ID：AA11503417
• 分析化学と材料物性 表面張力と界面張力
  松岡圭介
  ぶんせき, Number：3, First page：97‐98, 05 Mar. 2016
  Japanese
  ISSN：0386-2178, J-Global ID：201602207697098950
• 植物ステロール/スタノールによるコレステロールの吸収抑制機構に関する研究　　　　　　　　　　　　　　　
  松岡圭介
  オレオサイエンス, Volume：11, Number：4, First page：119, Last page：125, 01 Apr. 2011
  Japanese
  DOI ID：10.5650/oleoscience.11.119, ISSN：1345-8949, J-Global ID：201102289084616354, CiNii Articles ID：40018765807, CiNii Books ID：AA11503417
• マルチトレーサー法と放射化分析法によるSe欠乏ラット胆汁中の微量元素の動態の解析　　　　　　　　　　　　　　　
  山崎 公輔; 塚田 正道; 遠藤 和豊; 本田 智香子; 松岡 圭介; 松本 謙一郎; 安西 和紀; 榎本 秀一
  Volume：130年会, Number：4, First page：127, Last page：127, Mar. 2010
  Japanese
  ISSN：0918-9823, 医中誌Web ID：2011238918
• 胆汁酸塩ミセルへのコレステロール及び植物ステロール/スタノールの競争的可溶化
  松岡圭介
  Colloid & Interface Communication, Volume：34, Number：2, First page：14, Last page：15, 10 May 2009
  Japanese
  J-Global ID：201002220477410963
• Mouse Abcg5/Abcg8発現系におけるステロール輸送に関するin vitro機能解析
  前田和哉; 浅野静佳; 杉山雄一; 高田龍平; 松岡圭介
  薬理と治療, Volume：34, Number：Suppl.2, First page：S.101-S.105, 15 Dec. 2006
  Japanese
  ISSN：0386-3603, J-Global ID：200902225116084981
• 胆汁酸塩のミセル形成とミセルヘの可溶化(コレステロール及びホスファチジルコリン)―その2　　　　　　　　　　　　　　　
  松岡圭介; 師井義清
  表面(表面談話会・コロイド懇話会), Volume：41, Number：10, First page：357, Last page：369, 01 Oct. 2003
  Japanese
  ISSN：0367-648X, J-Global ID：200902264003962139, CiNii Articles ID：40006262202, CiNii Books ID：AN00211091
• 胆汁酸塩のミセル形成とミセルへの可溶化　　　　　　　　　　　　　　　
  松岡圭介; 師井義清
  表面(表面談話会・コロイド懇話会), Volume：41, Number：7, First page：242, Last page：252, 01 Jul. 2003
  Japanese
  ISSN：0367-648X, J-Global ID：200902203529972024, CiNii Articles ID：40006015858, CiNii Books ID：AN00211091

• THE CHEMICAL SOCIETY OF JAPAN
• JAPAN OIL CHEMISTS' SOCIETY

• Metal removal by novel foam separation method in which ionic polymers are adsorbed on vesicle carriers　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), 01 Apr. 2022 - 31 Mar. 2025
  Saitama University
  Grant amount(Total)：3380000, Direct funding：2600000, Indirect funding：780000
  Grant number：22K05185
• Establishment of foam separation method for removal of radioactive metals　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), 01 Apr. 2016 - 31 Mar. 2019
  MATSUOKA Keisuke, Saitama University
  Grant amount(Total)：4290000, Direct funding：3300000, Indirect funding：990000
  Foam separation could be used to remove a series of alkali metals and alkali earth metals from aqueous solutions based on electrostatic interactions between the anionic surfactant and metals. The most suitable concentration of the surfactant for which the alkali ions were selectively adsorbed was less than the CMC. The microbubble generator apparatus used in this study was effective in removing the alkali metals. The order of removal rate of the alkali metal was almost Li < K < Rb < Cs for the sodium dodecylsulfate surfactant system. On the other hand, the order of removal rate of the alkali earth metal was almost Mg < Ca < Sr for the sodium decylsulfate surfactant system. The order is lined up atomic number. The first order of removal rate constants with crystal ion radius were showed linear relationships in respective series. This method may be applied in the purification of the contaminated water from nuclear power plants and in industrial drainage.
  Grant number：16K00582
• Possibility of the glycyrrhizic acid as emulsifier for drug and the application to absorption inhibitor of cholesterol　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), 01 Apr. 2013 - 31 Mar. 2016
  MATSUOKA Keisuke, Saitama University
  Grant amount(Total)：4290000, Direct funding：3300000, Indirect funding：990000
  The glycyrrhizin acid has two carboxylic groups at double glucuronic acids and one carboxylic group on the top of molecule as the hydrophilic part. Therefore, the polyvalent weak acid had a great influence on the surface and aggregate properties depending on the pH of the buffer solutions. The aqueous solubility of glycyrrhizin acid was quite low in the lower pH range. The pH range for micelle formation was quite narrow, from pH 5 to 6. Glycyrrhizic acid forms rod-like micelles.The existence of this aggregate highlights the potential applications of glycyrrhizic acid as an emulsifier and solubilization agent. Glycyrrhizin acid exists as monomer state at pH > 7. Therefore, it is necessary to pay attention to the pH of the solution when this biosurfactant is used as an emulsifier or solubilizer in the practical fields. In future, the aggregation structure based on the specific molecular structure will be examined using similar compounds, glycyrrhetic acid, 3-O-glucuronide.
  Grant number：25460043
• Investigation into mechanism of inhibitive cholesterol absorption by plant sterols and the novel method　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Young Scientists (B), 2009 - 2011
  MATSUOKA Keisuke, Showa Pharmaceutical University
  Grant amount(Total)：4030000, Direct funding：3100000, Indirect funding：930000
  The mechanism of cholesterol lowering by the addition of several kinds of plant sterols/sterols was investigated in model intestinal solution. Slight differences in the molecular structures of a category of sterol/stanol species affect the solubility of cholesterol in a model intestinal solution. The results of competitive solubilization revealed that cholestanol has the largest cholesterol-lowering effect, decreasing cholesterol solubility to 35% of that in a single solubilizate system. The cholesterol-lowering effect increase in the order ofGrant number：21790043
• OXIDATIVE STRESS BY SE-DEFICIENCY AND DYNAMICS OF BIOTRACE ELEMENTS　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), 2005 - 2007
  ENDO Kazutoyo; HONDA Chikako; MATSUOKA Keisuke; ENOMOTO Shuichi, Showa Pharmaceutical University
  Grant amount(Total)：3680000, Direct funding：3500000, Indirect funding：180000
  1) In vivo free radical reactions in rat liver as a result of exposure to low-dose β-radiation was evaluated with electron paramagnetic resonance (EPR) spectroscopy by monitoring the reduction of the nitroxyl spin probe after intravenous administration. Results suggest that under low levels of tissue oxygen, exposure to β-rays results in nitroxyl signal loss, which may be mediated by free radical dependent pathways.
  2) Biochemical data of AST, ALT, and BUN for the plasma fraction of the rat bloods, and the concentration of vitamin C and vitamin E were measured in the liver homogenates. The relationships among the biotrace elements and the biochemical data were compared, and the indices for oxidative stress caused by selenium deficiency were discussed in terms of reactive oxygen species (ROS) , and antioxidants in the organism.
  3) Free radical-reducing activity and membrane fluidity of liver microsomes from Se-deficient (SeD) Wistar rats were examined by EPR spin label method using nitroxyl-labeled stearic acids. SeD induced the liver microsomal cytochrome P 450 activity ; the nitroxyl spin probes are substrates for reduction-relating cytochrome P 450. The reduction rate of nitroxyl radical at shallow depth in membranes was increased.
  4) Although the oxidative stress caused Fe accumulation in the liver, the Fe concentration in bile of the SeD rat was almost the same as that in the control rats. Due to the trapping of reactive oxygen species, only bilirubin concentrations in the bile and plasma were decreased in the SeD group, when compared with those in the control group. Measurement of bilirubin concentration may be used as a supplemental oxidative stress marker.
  5) Dynamics of redox relating biotrace elements, selenium, iron, and zinc in liver, kidney, and spleen of selenium deficient Wistar male rats in a series of feeding period (from 0 to 8 weeks) were studied using instrumental neutron activation analysis. The results were compared with those of aspartate aminotransferase (AST) , alanine aminotransferase (ALT) , and blood urea nitrogen (BUN) for the plasma fraction of the rat bloods.
  Grant number：17590040

• 横型高耐圧トランジスタ　　　　　　　　　　　　　　　
  Patent right
  J-Global ID：200903061428636966