Air flow and ventilation or air purifiers are necessary to expel aerosol particles floating in closed spaces!「閉空間に漂うエアロゾル粒子を追い出すには空気の流れと換気・空気清浄機が必要です!」
Tag: global
植物葉における水溶性粒子の局在の可視化 Localization of “Water-Soluble” Particles on Leaf Surfaces
The particles were deposited on the surfaces of the leaves and needles in the same manner, regardless of leaf structure. 堆積した粒子は凝集せず、葉の構造に依存性がないことを確認した
低コストで携帯型（気中浮遊）粒子計測器 Low-cost, portable, aerosol/PM sensor
Arduino-based real-time PM10 sensor, with temperature and humidity. マイクロコントローラArduinoを用いたオンラインPM10 (10μm未満の粒子状物質) 測定を開発。数Ⅰ000 μg/m3 の濃度も測定可。
同一ロウソクから親水性と疎水性の両方の粒子層が製造可能 From a single candle: we can make both hydrophilic & hydrophobic layers.
Using “soot” from a candle burning, we developed assembly routes to form hydrophilic or hydrophobic layers of carbonaceous nanoparticles. ロウソク燃焼の「煤」を用いて、親水性または疎水性を有するナノ粒子膜の作製する方法を開発。5000年前に中国で開発された、従来の「墨」技術と同じかどうか？
Does the leaf structure prevent the deposition of aerosols? 葉の構造はエアロゾルの付着を防止する？
Epicuticular “wax” crystals affect distribution of incoming particles on leaf surfaces. 気孔の機能を保持するために密に分布されたワックスは、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。
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/ Removal 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: Electrophoretic deposition; Fibre electrodes; Limiting flux;…
PAPER: Fine particles on bio-composite surface. ココナツ殻由来素材の表面に微粒子を集積
Other “intro” of papers from our lab >> /tag/paper/ HIGHLIGHTS:* Physical treatment on the biocomposite increases the surface roughness.* Single bond COOH network on the treated biocomposite promotes the particle deposition.* The network reduces the particles repulsion during the deposition process. # Bio-composite（バイオコンポジット）is a composite material formed by a matrix (resin) and a reinforcement of…
微粒子の散布した被検査体表面の「分子層」可視化 Visualization of “molecular layer” on an object by spraying nanoparticles.
Aerosol nanoparticle sensor system for probing a layer of organic molecules, at sub-100 nm resolution . 応用：残留農薬, PM2.5, 半導体表面の検査
植物葉の模擬 Modeling Nature: 正帯電した気中粒子が親水性が高い表面に付きやすい Between charged aerosols and wettability of the “leaf” surface model.
（現象の発見）正帯電した気中浮遊粒子（エアロゾル）が親水性が高い表面に付きやすい。
応用例：大気汚染と植物表面の理解。新しい材料の開発。
Are the particles deposited to the back of a sheet? 薄板の裏側まで微粒子が沈着するのか？
Simultaneous deposition of submicron aerosols onto both surfaces of a plate substrate by electrostatic forces M. Gen, S. Ikawa, S. Sagawa, I. W. Lenggoro e-Journal of Surface Science and Nanotechnology, 2014. http://dx.doi.org/10.1380/ejssnt.2014.238 Open access. サブミクロンの帯電粒子を気中に浮遊させて、目的の平板の両面に粒子群が沈着しているメカニズムを説明した。 【展開】植物の葉に沈着する微粒子の挙動（農薬等の散布法）の理解 【展開】自動車等の静電塗装の分野
PAPER: Effect of water-soluble particles on the growth of plants (2 years) 植物に水溶性微粒子を与えていたら？
JOURNAL: Atmospheric Environment (2014) http://www.sciencedirect.com/science/article/pii/S1352231014000405 Effects of 2-years exposure to (sub-micron) ammonium sulfate particles on growth and gas exchange rates of Fagus crenata (ブナ), Castanopsis sieboldii (スダジイ), Larix kaempferi (唐松) and Cryptomeria japonica (スギ) seedlings •No significant effect of the particles on growth was observed after 2 years. •Net photosynthetic rates of 3 species were not significantly changed….
PAPER. Measuring carbon particles on leaf surface, 葉面上の炭素系粒子の計測手法
We investigated an optical method for measuring the amount of BC extracted from foliar surfaces and collected on quartz fiber filters. 樹木・葉面から抽出され石英繊維フィルター上に収集されたカーボン系粒子の量を測定する光学的方法を検討した。
PAPER. Visualization of particles on the leaves in trees, 葉面上の粒子の可視化
Visualization of artificially deposited submicron-sized aerosol particles on the surfaces of leaves/needles in trees 樹木の葉表面に任意的に微粒子を沈着させ、それを「可視化」する技術
PAPER. Deposition process of particles in forests, 森林への大気中微粒子の沈着過程
Particulate matter strongly adsorbed onto leaf surfaces is not washed away by rainfall and contributes to the EC (Elemental Carbon) flux. Leaf-surface particles must be included when evaluating the dry and total fluxes of particulate matter, in particular for water-insoluble constituents such as EC. 葉面に強く「付着」した粒子状物質は降雨によって洗い流されず、EC(元素炭素)フラックスに寄与する。粒子状物質、特にECのような水不溶性成分の乾燥流束および全流束を評価する場合には、葉表面粒子を含めなければならない。
PAPER. Exposure (carbon-based particles) vs. growth rates of plants, 植物成長 vs 炭素系微粒子
This is the world`s first “exposure” study using sub-micro meter
(few hundred nanometers) sized particles with growing plants designed for multi-year experiment.
約2年間の実験で植物成長におけるサブミクロン微粒子の影響を調べた、世界初の研究です。
PAPER: Measuring particles from mixed gases, ガス由来微粒子の計測
These results may be informative for predicting phenomena related to gas-to-particle conversion at the exit of stationary emission sources.火力発電所等の燃焼過程から生成すると考えられる混合排気ガスを実験室内で模擬した。This paper was awarded 2013 Takahashi Award from Japan Association Aerosol of Science and Technology. エアロゾル学会の2013年のTakahashi賞を受賞。
PAPER: Nano-structure for on-site detection of pesticide. 残留農薬の現場検査に向けたナノ構造化
The substrate (chip) was made by structuring nanoparticles, and the detection accuracy of a trace (model: a pesticide) component using Raman scattering spectroscopy was improved. ナノ粒子の構造化による基板（チップ）形成を行い、ラマン散乱分光を用いた微量な（モデル：農薬）成分の検出精度を向上させた。
