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関連する概念動画

Photoreceptors and Plant Responses to Light02:00

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Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
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The de Broglie Wavelength02:32

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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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Drugs exert their therapeutic effects by interacting with receptors, enzymes, or ion channels that are present throughout the human body. The strength and duration of the interaction between a drug and its target receptor are characterized by the selectivity and specificity of the drug. Selectivity refers to a drug's strong preference for its intended target over other targets. For instance, isoprenaline, a non-selective β-adrenergic agonist, interacts with both β1- and...
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The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
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The Wave Nature of Light02:12

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The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
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Light Acquisition02:16

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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関連する実験動画

Updated: Feb 9, 2026

Sample Preparation and Transfer Protocol for In-Vacuum Long-Wavelength Crystallography on Beamline I23 at Diamond Light Source
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波長選択光反応型DASA機能化されたポリマーナノ原子炉

Omar Rifaie-Graham1, Sebastian Ulrich1,2, Nikolas F B Galensowske1

  • 1Adolphe Merkle Institute , University of Fribourg , Chemin des Verdiers 4 , 1700 Fribourg , Switzerland.

Journal of the American Chemical Society
|June 2, 2018
PubMed
まとめ

研究者は,ドナー-受容体ステンハウスの誘導体 (DASA) を使用して光反応性ポリマーナノリアクターを開発した. これらのナノ炉は可視光で起動し 暗闇で不活性状態に戻し 制御された化学反応を可能にします

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科学分野:

  • 材料科学
  • ポリマー化学
  • ナノテクノロジー

背景:

  • 光受容体は生化学的プロセスに 短時間的な光活性化を利用する.
  • 人工ナノシステムは,制御された反応のための光反応性を模倣することを目指しています.

研究 の 目的:

  • 可視光で切り替えるポリマーナノ原子炉を開発する.
  • 暗闇の中での不活性状態に 素早く戻れるように
  • 光制御による触媒と 荷重の解放を可能にします

主な方法:

  • RAFTポリメリゼーションによるアンフィフィリックブロックコポリマーの合成.
  • Meldrumの酸性またはピラゾロン性DASAで機能化しました.
  • ポリマソームベシクルに自己組み立てられ,透かし性が制御されます.

主要な成果:

  • ポリマーソームは,光によって誘発されたペイロードの放出を示し,光を取り除く時に停止した.
  • ナノリアクターのカプセル化された酵素は,可視光照射下でのみ反応を触媒化します.
  • 緑色と赤色の光に反応するナノ反応器の混合を用いて波長選択的触媒を達成した.

結論:

  • DASAベースのナノ反応器は,光制御された膜透過性のための有望なプラットフォームを提供します.
  • これらのシステムは,マイクロ流体および薬物投与における反応のオンデマンドスイッチングの可能性を示しています.