PAPER: Hydrophilic or hydrophobic layers from candle “soot”. ろうそくの煤から「親水性 or 疎水性」ナノ粒子層をつくる


light-1551386_960_720Using “soot” from candles, we developed assembly methods for hydrophilic or hydrophobic layers of carbonaceous nanoparticles.

研究室からの新提案:ロウソクの「煤」を用いて、親水性または疎水性を有する炭素質ナノ粒子膜の作製する方法。

contact-angle-Ferry2017

Open access (Full PDF): https://doi.org/10.4209/aaqr.2017.10.0426

More… Continue reading “PAPER: Hydrophilic or hydrophobic layers from candle “soot”. ろうそくの煤から「親水性 or 疎水性」ナノ粒子層をつくる”

PAPER: Thermal convections break the mist: A method for synthesis of particle layer. 熱対流がミストを微細化。微粒子層の新しい合成法

Discovery of a low-energy route to layer of nanometer-sized particles with high crystallinity. 高結晶性を有するナノ粒子層への「省エネプロセス」の発見。 Continue reading PAPER: Thermal convections break the mist: A method for synthesis of particle layer. 熱対流がミストを微細化。微粒子層の新しい合成法

PAPER: Spraying water-soluble particles to komatsuna leaves. 小松菜に水溶性微粒子を散布したら・・

Short Introductions of /our papers/


Free-access (until Dec. 1, 2017): elsevier.com

Komatsuna plants were grown and exposed to ammonium sulfate (((NH4)2SO4), AS) submicron particles for 16 days (22.5 µg m−3 per day) in phytotrons.

The amount of particles deposited on the leaf  decreased over time, because AS particles deposited on the leaf deliquesced, allowing ions such as SO42− in the solution to be absorbed into the leaf. 葉表面に堆積した粒子の量は時間とともに減少した。サブミクロン硫酸アンモニウム(AS)粒子が葉表面に堆積し、脱離溶液中のSO42−などのイオンが葉に吸収される可能性が高い。

Continue reading “PAPER: Spraying water-soluble particles to komatsuna leaves. 小松菜に水溶性微粒子を散布したら・・”

Doctoral Presentation (8/17) on Enzyme Immobilization (by Suryani Saallah) 酵素の固定化(博士公聴会)

DEPOSITION AND IMMOBILIZATION OF ENZYME BY MEANS OF ELECTROHYDRODYNAMIC ATOMIZATION (電気流体力学効果を用いた酵素の固定化)

by Suryani binti Saallah**suryani-nanofiber2016B

12:30-  17 Aug. 2017 (BASE Building 1F meeting room, TUAT Koganei campus)

 

Continue reading “Doctoral Presentation (8/17) on Enzyme Immobilization (by Suryani Saallah) 酵素の固定化(博士公聴会)”

Doctoral student presented in Asian Particle Technology Symposium 2017 (Taiwan). 博士学生が台湾で発表した

Ferry Faizal (doctoral student) presented “Decomposition of solution droplets under the influence of thermal convection over a heated horizontal plate” in the 7th Asian Particle Technology Symposium (30 July – 3 August, 2017 at Chang Gung University Campus, Taoyuan, Taiwan).

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Our talk was invited and published in APT2017 special issue (Advanced Powder Technology).

doi.org/10.1016/j.apt.2017.10.026

Highlights:

  • The role of thermal convection on reactive spray deposition over a heated plate.
  • Nozzle-to-plate distance affecting morphology and size of deposited particles.
  • Discovery of a low-energy route to layer of nanometer-sized particles with high crystallinity.

ハイライト:

  • 加熱されたプレート上の溶液ミストの熱分解と堆積に対する熱対流の役割
  • ノズルとプレートとの距離が堆積粒子の形態とサイズに影響した。
  • 高結晶性を有するナノサイズ粒子層への低エネルギー手法の発見。

 
Continue reading “Doctoral student presented in Asian Particle Technology Symposium 2017 (Taiwan). 博士学生が台湾で発表した”

A doctoral student presented in Asian Aerosol Conference 2017 (Jeju, Korea)博士学生が韓国で発表した。

Presenter: F. Faizal (Doctoral student), Co-author: S. Yokote (Master-student), M. P. Khairunnisa (former doctoral student, now with Ministry of Higher Education, Malaysia), W. Lenggoro “Direct- and Electrospray-Depositions of Particles Derived from Burning Candles” DATE: JULY 2 – 6, 2017,  VENUE: ICC JEJU, JEJU, KOREA * Presentation by student >> LIST       Continue reading A doctoral student presented in Asian Aerosol Conference 2017 (Jeju, Korea)博士学生が韓国で発表した。

An Electric Field Mill in BASE building Koganei Campus

学芸大学(鴨川研究室)の主催で、レンゴロ研究室は大気電場多点観測ネットワークに協力することになりました。研究の目的としては、多摩地区では落雷や降雹、ゲリラ豪雨を伴った積乱雲が数多く発生することが報告されています。これらの現象は雷雲が作り出す電場の変動と密接な関係があると考えられ、レーダー観測と合わせることで雷雲の電気的な構造を明らかにしていきます。大気電場測定装置を小金井を中心とした半径5km以内の領域に集中展開します。他の設置場所候補として、JAXA筑波宇宙センター、調布航空宇宙センター、調布飛行場があります。 Organized by Gakugei University (Kamogawa laboratory), Lenggoro laboratory has cooperated within the atmospheric electric field multipoint observation network. It is reported that in Tama area many thunder clouds accompanied by lightning strikes, hail, and “quick” heavy rain are generated. These phenomena are thought to be closely related to the fluctuation of electric field which thunder cloud produces, and the project will clarify the electrical … Continue reading An Electric Field Mill in BASE building Koganei Campus

Article: Doctoral thesis (by M. Gen) 博士論文の紹介記事

Aerosol Kenkyu (J. Aerosol Res., Jpn.) Vol. 31, No.2, 2016. Dr. Masao Gen (Bachelor-, master- and doctoral course) writes about his thesis. After working with WPI-AIMR, Tohoku University as Assistant Professor, he joined City University of Hong Kong, as a Research Fellow of School of Energy and Environment (Dean: Prof. Chak K. Chan) His doctoral works: Gen, 2014 Other doctoral thesis: From our Lab Continue reading Article: Doctoral thesis (by M. Gen) 博士論文の紹介記事

PAPER: Leaf waxes to prevent “incoming” particles. 大気中微粒子の付着を防止する葉の仕組み

Other “intro” of papers from our lab >> /tag/paper/


Journal of Plant Research (13 June 2016) DOI 10.1007/s10265-016-0839-7
plants-Fuchucampus“Effect of epicuticular wax crystals on the localization of artificially deposited sub-micron carbon-based aerosols on needles of Cryptomeria japonica (Sugi)”

電界放出型走査電子顕微鏡(FE-SEM)によるスギ(代表的な針葉樹種)の葉表面に人工的に散布されたサブミクロンサイズの炭素系粒子の局在を調べました。気孔の機能を保持するために、密に分布されたエピクチクラワックス結晶は、気中からの微粒子の付着を防止する役割があるかもしれません。from-nakaba-2016-JPlantRes

Elucidation of the mechanism of adsorption of particles suspended in the gas-phase (aerosol) to the outer surfaces of leaves provides useful information for understanding the mechanisms of the effect of aerosol particles on the growth and physiological functions of trees. We examined the localization of artificially deposited sub-micron-sized carbon-based particles on the surfaces of needles of Cryptomeria japonica, a typical Japanese coniferous tree species, by field-emission scanning electron microscopy (FE-SEM).  Our results suggest that epicuticular wax crystals affect distribution of particles on needles. Therefore, densely distributed epicuticular wax crystals might prevent the deposition of sub-micron particles on the surfaces of needles to retain the function of stomata.


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PAPER: “Re-use” enzyme in ~200 nm polymer fiber: 高分子ファイバー中に再利用可の酵素

Other “intro” of papers from our lab >> /tag/paper/ Immobilisation of enzyme into synthetic resin nanofibres via electrospinning. 電界紡糸法(エレクトロスピニング)による酵素の樹脂(繊維)中への固定化 Biotechnology Reports, 10, 2016, 44–48 OPEN ACCESS >>  dx.doi.org/ Resin樹脂: Polyvinyl alcohol. 親水性が強い。 Enzyme酵素: cyclodextrin glucanotransferase。グルコースのオリゴ糖が環状となった構造で、食品、医薬に使用。 Highlights: * PVA nanofibers structure and size were not affected by the addition of enzyme. PVAナノファイバー構造とサイズは酵素の添加に影響されなかった。 * Enzyme/PVA nanofibers show excellent immobilisation efficiency. 酵素/PVAナノファイバーは優れた「固定化」効率を示す。 OTHER ARTICLES: S Saallah, et al. Journal of Fiber … Continue reading PAPER: “Re-use” enzyme in ~200 nm polymer fiber: 高分子ファイバー中に再利用可の酵素