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Dive into the research topics where Yuka Ueda is active.

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Featured researches published by Yuka Ueda.


Journal of the society of cosmetic chemists | 2004

The Characteristics of a Microcapsule with an Entirely New Wall Material, “Silicone Resin Polypeptide, ” and Its Application

Yuka Ueda; Akihiro Segawa; Masato Yoshioka

現在まで, マイクロカプセルの製法や利用方法など数多くの研究が行われてきている。今回われわれは, 新たな壁材として, 「シリコーンレジン化ポリペプチド」を用いたマイクロカプセル化技術を開発した。この壁材を使用することにより, 90%もの高い内包率のマイクロカプセルを容易に調製することができた。また, このマイクロカプセルは平均粒径が約2μmと微細であるため, ホモミキサーの剪断力に対しても安定であり, 経時安定性も良好であるなどの知見が得られた。そこでわれわれは紫外線吸収剤を内包したマイクロカプセルを用いて化粧品への応用を検討した。その結果, これまで配合が困難であった水系の処方に界面活性剤を使用せずに, 油性である紫外線吸収剤を配合することを可能にし, 紫外線吸収剤特有の塗り感触の重たさや臭いなどを抑え, 配合量を向上させることができた。また, 無機紫外線防御剤と安定に併用することができるため, その配合量を抑えながら, 高いSPF値を化粧品製剤に付与することができた。このように, これまで有機系紫外線吸収剤の配合が困難であった処方系への応用を可能にした。


Journal of the society of cosmetic chemists | 2009

The Properties and Application of a Novel Amphiphilic Polymer as an Active Interfacial Modifier

Naoko Ohtani; Ayako Koyanagi; Yuka Ueda; Kazutami Sakamoto; Masato Yoshioka

pp.247–253 n n n nA peptide/silicone hybrid functional polymer composed of silk peptide and silicone resin with a hydrophobic alkyl group was investigated for its compatibility and functionality as a cosmetic ingredient. We have found this polymer provides characteristic functions to modify and control various interfacial properties and named it active interfacial modifier (AIM-FN). At the liquid/liquid interface, AIM-FN worked as an excellent W/O emulsifier for various oils, polar or non-polar, and even for silicone oil. In principle AIM-FN stays at the interface between the aqueous phase and lipid phase because it is not compatible with either phase. At liquid/solid interfaces, the peptide moiety of AIM-FN attaches to the hydrophilic solid surface and makes it water repellant and water proof with its hydrophobic silicone and alkyl residue. An emulsion formulated with AIM-FN gives a non-oily and non-tacky skin feeling as AIM-FN improves the solid/solid (skin/skin) surface property.


Archive | 1999

Microcapsule containing core material and method for producing the same

Masato Yoshioka; Akihiro Segawa; Emi Segawa; Koji Nosaka; Terumi Yoshihara; Takashi Adachi; Hiroshi Shintani; Yuka Ueda


Archive | 1999

Microcapsule having a specific wall and method for producing the same

Takashi Adachi; Koji Nosaka; Akihiro Segawa; Emi Segawa; Hiroshi Shintani; Yuka Ueda; Terumi Yoshihara; Masato Yoshioka


Archive | 1999

Cosmetic formulated with filled fine microcapsule

Sueko Omi; Akihiro Segawa; Yuka Ueda; Masato Yoshioka; 正人 吉岡; 須恵子 大海; 有香 植田; 昭博 瀬川


Archive | 2007

Oil dispersion of minute capsules, oil dispersion of encapsulated minute capsules, and cosmetics containing them

Tomoyuki Hayasaka; Yukihiro Morita; Yuka Ueda; Keiichi Uehara; Masato Yoshioka; 正人 吉岡; 友幸 早坂; 幸浩 森田; 計一 植原; 有香 植田


Archive | 1999

Mikrokapsel mit spezifischer Wand und Verfahren zur Herstellung

Takashi Adachi; Koji Nosaka; Akihiro Segawa; Emi Segawa; Hiroshi Shintani; Yuka Ueda; Terumi Yoshihara; Masato Yoshioka


Journal of the society of cosmetic chemists | 2011

Peptide-Silicone Based Microcapsule Suitable for Sun-care Products

Yumiko Iga; Yasuko Matsui; Akihiro Segawa; Yukihiro Morita; Yuka Ueda; Masato Yoshioka


Archive | 1999

With specific microcapsule wall and methods for preparing

Masato Yoshioka; Akihiro Segawa; Emi Segawa; Koji Nosaka; Terumi Yoshihara; Takashi Adachi; Hiroshi Shintani; Yuka Ueda


Archive | 1999

Mikrokapsel mit spezifischer Wand und Verfahren zur Herstellung With specific microcapsule wall and methods for preparing

Masato Yoshioka; Akihiro Segawa; Emi Segawa; Koji Nosaka; Terumi Yoshihara; Takashi Adachi; Hiroshi Shintani; Yuka Ueda

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Kazutami Sakamoto

Tokyo University of Science

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