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関連する概念動画

Ion Channels01:19

Ion Channels

91.4K
The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
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Cell Size01:22

Cell Size

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Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (μm)and are considerably smaller than most eukaryotic cells. The smallest bacteria are 0.1 μm in diameter—about a thousand times smaller than eukaryotic cells, which typically range from 10-100 μm.
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding...
127.0K
Channel Rhodopsins01:11

Channel Rhodopsins

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Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
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Brick Sizes01:21

Brick Sizes

331
Brick sizing plays a crucial role in construction, influencing both the aesthetics and structural integrity of buildings. Bricks are defined by three dimensions: width, thickness, and length. They are commonly designed to fit modular measurements, typically in multiples of 4 inches or 8 inches in width, to facilitate uniform construction and compatibility with other building materials.
Modular bricks are the most common type and are sized to include the mortar joint, which is essential for...
331
Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

9.1K
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
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Maximum Size of Aggregate01:12

Maximum Size of Aggregate

543
The maximum size of aggregate is defined as the aperture of the sieve retaining 15 percent or more of the particles present in the aggregate sample. The aggregate's maximum size impacts the concrete's water requirement, workability, and strength. Larger aggregates reduce the surface area needing cement paste coverage, which can lower water needs, thereby allowing a decrease in the water-to-cement ratio when the desired workability and richness of the mix are to be maintained, which can...
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関連する実験動画

Updated: Jan 28, 2026

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
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Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid

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生体模倣ナノメートルサイズのオール液体チャネル

Quanyong Cheng1, Yuhang Song1, Liyan Dai2

  • 1School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry For Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei, China.

Advanced materials (Deerfield Beach, Fla.)
|January 27, 2026
PubMed
まとめ

研究者らは、ナノ粒子-ポリマー複合アセンブリを使用した新しい準静的ストレッチング法を開発し、安定した超微細液体チャネルを作成しました。この進歩はチャネルサイズを大幅に縮小し、細胞間救助や免疫療法などの生体模倣機能を可能にします。

キーワード:
界面ジャミング液体ブリッジ液体管状生体模倣ナノ粒子–ポリマー界面複合アセンブリ準静的ストレッチング

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Fluorescence Imaging with One-nanometer Accuracy FIONA

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Biomimetic Materials to Characterize Bacteria-host Interactions

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関連する実験動画

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Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
10:25

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid

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Fluorescence Imaging with One-nanometer Accuracy FIONA
11:56

Fluorescence Imaging with One-nanometer Accuracy FIONA

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科学分野:

  • ソフトマター物理学
  • ナノテクノロジー
  • 生物物理学

背景:

  • マイクロ/ナノスケールの流体チャネルは、細胞の質量移動に不可欠です。
  • 安定した超微細液体チャネルの人工的な構築は、プラトー・レイリー不安定性などの課題に直面しています。

研究 の 目的:

  • 安定した超微細オール液体チャネルを作成するための新しい方法を開発すること。
  • これらの人工チャネルを使用して生体模倣機能を実証すること。

主な方法:

  • 不混和性液体中の液体ブリッジに適用される「準静的ストレッチング」アプローチ。
  • 界面ナノ粒子-ポリマー複合アセンブリを使用した液体/液体の界面の操作。
  • 超微細チャネル形成のための成分選択規則の確立。

主要な成果:

  • 液体ブリッジのサイズを段階的に100ナノメートルスケールまで縮小しました。
  • ポリマー鎖の特性による液体ブリッジの塑性変形能を実証しました。
  • 細胞間のミトコンドリア救助と区画化された免疫療法のシミュレーションに成功しました。

結論:

  • 準静的ストレッチング法は、超微細チャネル作成のためのプラトー・レイリー不安定性を克服します。
  • 開発されたチャネルは、自然の生体模倣チャネルのサイズに近づきます。
  • このフレームワークは、管状構造によって媒介される生物物理学的プロセスに関する洞察を提供します。