本論文で示された知見により、沈着効率が悪い従来法に代わって本手法を気液界面細胞曝露に応用できれば有用である。The method presented here may potentially be applied for the deposition and analysis of submicron particles on various types of substrate (i.e. air-liquid interface) without the need for vacuum imaging analysis (e.g. electron microscopy).
Tag: biosystem
口から発せられた微粒子と換気 Particles from mouth & Ventilation
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!」
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
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
The particles were deposited on the leaves and needles in the same manner, regardless of leaf structure.
作物（小松菜）に水溶性微粒子を長期的に散布した後は？ What happens after long-term spraying of water-soluble fine particles on a crop (komatsuna)?
Short Introductions of other papers: /paper/ 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…
葉の構造はエアロゾルの付着を防ぐ？Does the leaf structure prevent the aerosol deposition?
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。
高分子繊維中に固定化された酵素が再利用できるか？ Can enzymes immobilized in (200 nm) polymer fibers be reused?
Enzyme in polymer-nanofibers show excellent immobilization efficiency. 高分子ナノファイバー中の酵素は優れた「固定化」効率を示す。
表面電位顕微鏡で大気中から捕集した粒子の帯電状態を評価したEvaluating the charging state of particles collected from the air using Kelvin-Force Microscope.
呼吸により人体に入る微粒子の帯電状態が注目された。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手法を考案。The importance of electrostatic charging state to particle deposition in the human airways has been suggested. We developed a measurement method of electrostatic charging state of individual ambient aerosol particles
ココナツ殻由来素材の表面に微粒子を集積 Fine particles on bio-composite surface.
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…
電池用粉末の合成に植物由来の原料を使ってみた。Plant-derived materials for a synthesis of battery powder
Without a milling process (break-down) process, Lithium-battery material can be synthesized, in submicron size (100-600 nm) through glucose-assisted combustion synthesis.（植物由来原料）グルコースを添加した新しい「燃焼合成法」により二次電池用粉末をサブミクロンサイズで合成できた。
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。
酵素(粒子)はどこまで小さくできるのか？How small can the enzyme be ?
http://dx.doi.org/10.1016/j.enzmictec.2014.06.002 Transformation of an enzyme: from aqueous suspension to fine solid particles via electrospraying route 静電噴霧法による糖転移酵素の微粒化 by* Dept. of Process and Food Engineering, Univ. Putra Malaysia; * Biotechnology Research Institute, Univ. Malaysia Sabah; * Faculty of Chemical Engineering, Univ. Teknologi MARA; * Grad. School of Bio-Applications and Systems Engineering, Tokyo Univ. of Agriculture and Technology…
薄板の裏側まで微粒子が沈着？Are the particles deposited to the back of a sheet?
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
植物に水溶性微粒子を2年間与えていたら？Effect of water-soluble particles on growth of plants (2 years experiment)
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
森林への大気中微粒子の沈着過程. Deposition process of particles into forests
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。
植物成長 vs 炭素系微粒子 Exposure: Carbon-based particles vs. growth rates of plants
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。
残留農薬の現場検査に向けたナノ構造化A nano-structure for on-site detection of pesticide
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。
ラット肺に吸入したナノ粒子（遺伝子発現）Inhaled Nanoparticles in Rat Lung
A study of gene expression in the lungs of rats exposed by inhalation to several tens to hundreds of nanometers of oxide particles over 4 weeks (Six hours a day) 4週間（毎日6時間運転）でラットに数十nm～数百nmの酸化物粒子を吸入させ、ラット肺における遺伝子発現に関する研究。
