PAPER: Thermal convections break the incoming mist: A new method for synthesis of nanoparticle layer. 熱対流がミストを微細化。ナノ粒子層の新規合成法

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 incoming mist: A new method for synthesis of nanoparticle layer. 熱対流がミストを微細化。ナノ粒子層の新規合成法

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 (Open, 8/17) on enzyme immobilization (Suryani Saallah) 酵素の固定化(博士論文公聴会)

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**

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

 

Continue reading “Doctoral Presentation (Open, 8/17) on enzyme immobilization (Suryani Saallah) 酵素の固定化(博士論文公聴会)”

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).

020  027

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。

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: Plant leaf waxes to prevent deposition of particles. 大気中微粒子の付着を防止する葉面のワックス結晶

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(代表的な日本の針葉樹種)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 thatepicuticular wax crystals affect distribution of carbon-based particles on needles. Therefore, densely distributed epicuticular wax crystals might prevent the deposition of sub-micron-sized carbon-based particles on the surfaces of needles of Cryptomeria japonica to retain the function of stomata.


RELATED TOPICS:

Continue reading “PAPER: Plant leaf waxes to prevent deposition of particles. 大気中微粒子の付着を防止する葉面のワックス結晶”

PAPER: “Re-use” enzyme with polymer nanofiber, 高分子ファイバーで酵素の固定化と再利用

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: * Fabrication of enzyme-carrying polymeric nanofibers by electrospinning. * PVA nanofibers structure and size were not affected by the addition of enzyme. * Enzyme/PVA nanofibers show excellent immobilisation efficiency. Related topics. … Continue reading PAPER: “Re-use” enzyme with polymer nanofiber, 高分子ファイバーで酵素の固定化と再利用

PAPER: Removal of particles from potable water. 水道水(飲料水)から微粒子を採集

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


stock-photo-water-pouring-from-a-jug-into-a-glass-on-blue-95668024Removal of iron-oxide particles after post-filtration in local potable water using an electrophoretic method

Collaborated with: Univ. Putra Malaysia; Univ. Teknologi MARA, Malaysia

Journal of Water Process Engineering: Vol. 9, Feb. 2016, Pages 208–214. doi:

Full text/PDF: Researchgate, or here

Keywords: Elnaim2016-waterectrophoretic deposition; Fibre electrodes; Limiting flux; Iron oxide; Zeta potential

Recent journal articles from our group.研究室から発表した(最近の)論文1288741555_themes

Continue reading “PAPER: Removal of particles from potable water. 水道水(飲料水)から微粒子を採集”

PAPER: Charge of Particle by Kelvin Probe Force Microscopy. ケルビンフォース顕微鏡で粒子の帯電を計測

Other “intro” of papers from our lab >> /tag/paper/ A collaborated study with Dr. Okuda group at Keio University. エアロゾル研究 Vol. 30 (2015) No. 3 p. 190-197 (Journal of Aerosol Research) doi.org/ | ResearchGate Kelvin Probe Force Microscopyを用いたエアロゾル個別粒子の帯電状態の測定 Measurement of the Electrostatic Charging State of Individual Particles in Ambient Aerosol Using Kelvin Probe Force Microscopy (Okuda, Gunji, Lenggoro)   呼吸により人体に入る微粒子に関する課題において、微粒子の帯電状態が注目されるようになった。本研究では大気中に浮遊する微粒子の帯電状態を評価できる新たな手法を考案した。大気環境中から捕集された微粒子の表面電位を測定し、その微粒子の電荷素量が4以上であることが明らかになった。今後は化学組成と帯電状態との関係を検討していく必要も考えられる。 Recently, the importance of electrostatic charging state to particle … Continue reading PAPER: Charge of Particle by Kelvin Probe Force Microscopy. ケルビンフォース顕微鏡で粒子の帯電を計測