The morphological characterizations revealed the formation of flower-like c-AgNPs composed of intercrossed and random lamellar petals of approximately 50 nm in thickness. The prepared materials displayed promising antibacterial properties against E. coli and S. aureus.
Tag: biosystem
Liquid transport with fluorescent particles. Finding “impurities” in layers. 蛍光粒子で液体輸送。層に隠された微量不純物も発見
葉または紙（セルロース）に流れてくる「暖かい」液体をみる。Seeing a “warm” liquid that flows into leaves or cellulose fibers.
学生が11年前に作成した研究紹介の動画. 5 min. video created by students 11 years ago.
Made by: Seki Akito (undergrad. final project), Iguchi Yuki (Master 1st year) in 2010.
Nanocellulose from oil palm mesocarp fiber. アブラヤシ中皮繊維のナノセルロース化
低濃度のシュウ酸二水和物を組み合わせた分離技術。高い結晶化度。100nm以下の微粒子。Separation technology combined with low concentration of oxalic acid dihydrate. High crystallinity. Particle size is less than 100nm.
Award.学会賞 Deposition of submicron aerosols by closed-loop flow. 閉ループ式エアロゾル流による微粒子の沈着
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。Our 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).
口腔から発せられた微粒子と換気 Particles from the 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!」
Consistent particle deposition & localization in leaf structures. 様々な葉の構造で一貫した粒子の沈着と局在
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.
After spraying of water-soluble particles on a crop (komatsuna). 小松菜に水溶性微粒子を散布していた後は？
Ammonium sulfate particles deposited on the leaf deliquesced, allowing ions such as SO42− in the solution to be absorbed into the leaf. サブミクロン硫酸アンモニウム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。
Does the leaf structure prevent the aerosol deposition?植物葉の構造はエアロゾルの沈着を妨げるのか? We learn an engineering thing.
Epicuticular “wax” crystals affect distribution of incoming aerosol 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、微粒子の付着を防止する役割？
エアロゾル科学技術への静電噴霧の展開(Article) Application of Electrosprays
2007年に広島大学から東京農工大学に異動し，新たに研究室を立ち上げた時には静電噴霧法から離れようと考えた時もありましたが，新たな展開を見つけたことにより，現在も静電噴霧法に関連した研究を継続しています。
Can enzymes immobilized in polymer fibers be reused?高分子繊維中に固定化された酵素が再利用できるか？
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。
Award/学会賞 KPF-microscope for charging state of particles collected from air 大気中から捕集した粒子の帯電状態をKPF顕微鏡で調べた
呼吸により人体に入る微粒子の帯電状態が注目された。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
Particles on bio-composite surface. ココナツ殻由来素材の表面に微粒子を集積
Bio-composite（バイオコンポジット）is a composite material formed by a matrix (resin) and a reinforcement of natural fibers.生物由来素材を組み合わせて作った素材
Plant-derived materials for battery. グルコース添加の合成で電池用粉末は「質」が向上
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。
Discover how hydrophilicity levels affect aerosol deposition. Learn from the Plant Leaf. 植物に学んだ。親水性レベルがエアロゾル付着にどのように影響するかを発見した！
現象の発見。大気汚染と植物表面の理解。新しい材料の開発。Hints for material design, and for research on the deposition of airborne particles on plant surfaces
How small can the enzyme be ?酵素粒子はどこまで小さくできるのか？
Transformation of an enzyme: from aqueous suspension to fine solid particles 糖転移酵素の微粒化
Aerosols deposit behind the sheet (Plant leaf model)?（植物葉モデル）薄板の裏側までエアロゾルが沈着する？
Simultaneous deposition of submicron aerosols onto both surfaces of a plate substrate by electrostatic forces We demonstrate one-step deposition of submicrometer-sized particles suspended in the gas-phase onto a plate type substrate using an electrostatic-assisted spray system. The particles were deposited on plate-type metallic surfaces, on both front and rear sides of the substrate. This “both-side”…
Doctoral presentation (2014/5), 博士公聴会 Immobilization of particles from gas phase onto surfaces 気相からの粒子の基板への固定化
Immobilization of submicron- and nano-particles from gas phase onto solid surfaces by external forces （外力を用いたサブミクロン粒子とナノ粒子の気相から固体基板への固定化）(Thesis is written in English) 2014/5/23 Friday, 15:00 ~ 16:30, BASE1階会議室 発表者： 玄 大雄 (GEN, Masao) ** ** After working with WPI-AIMR, Tohoku University as Assistant Professor, he joined City University of Hong Kong Keywords: Deposition/assembly of particles, Particle exposure system for…
What happens when we spray water-soluble “air pollution” particles to plants for 2 years? 水溶性 「大気汚染」 粒子を植物に2年間散布したらどうなるでしょう?
JOURNAL: Atmospheric Environment (2014) https://doi.org/10.1016/j.atmosenv.2014.01.023 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.•Net photosynthesis…
How to measure “carbon” particles on leaves with an optical method. 葉に付着した 「炭素」 粒子を光学的に測定
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。
Visualization of particles on the leaves in trees. 葉面上の粒子の可視化技術
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
Deposition process of aerosols into forest/ 森林へのエアロゾル沈着過程を解明
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。
Exposure: Soot-particles vs. growth rates of plants 植物成長 vs スス粒子
forest tree species, black carbon particles, exposure, growth, gas exchange rates, stomatal diffusive conductance. 森林樹種、黒色炭素粒子、暴露、成長、ガス交換率、気孔拡散コンダクタンス
Aerosol & colloid route for Raman-substrate. To detect organic molecules at ppb levels. ラマン分光用基材の調製にエアロゾルやコロイド手法。有機分子をppbレベルまで検出
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。
"Particles & Transfer" Lab. 