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関連する概念動画

Accelerators01:17

Accelerators

286
Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
The effectiveness of calcium chloride can...
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Accelerating Fluids01:17

Accelerating Fluids

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When a fluid is in constant acceleration, the pressure and buoyant force equations are modified. Suppose a beaker is placed in an elevator accelerating upward with a constant acceleration, a. In the beaker, assume there is a thin cylinder of height h with an infinitesimal cross-sectional area, ΔS.
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
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Instantaneous Acceleration01:16

Instantaneous Acceleration

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Acceleration is in the direction of the change in velocity, but it is not always in the direction of motion. When an object slows down, its acceleration is opposite to the direction of its motion. Although commonly referred to as deceleration, this causes confusion in our analysis as deceleration is not a vector, and does not point to a specific direction with respect to a coordinate system. Therefore, the term deceleration is not used. For example, when a subway train slows down, it...
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Acceleration Vectors01:30

Acceleration Vectors

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In everyday conversation, accelerating means speeding up. Acceleration is a vector in the same direction as the change in velocity, Δv, therefore the greater the acceleration, the greater the change in velocity over a given time. Since velocity is a vector, it can change in magnitude, direction, or both. Thus acceleration is a change in speed or direction, or both. For example, if a runner traveling at 10 km/h due east slows to a stop, reverses direction, and continues their run at 10 km/h...
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Average Acceleration01:30

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The importance of understanding acceleration spans our day-to-day experiences, as well as the vast reaches of outer space and the tiny world of subatomic physics. In everyday conversation, to accelerate means to speed up. For instance, we are familiar with the acceleration of our car; the harder we apply our foot to the gas pedal, the faster we accelerate. The greater the acceleration, the greater the change in velocity over a given time. Acceleration is widely seen in experimental physics. In...
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Measuring Acceleration Due to Gravity01:12

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Consider a coffee mug hanging on a hook in a pantry. If the mug gets knocked, it oscillates back and forth like a pendulum until the oscillations die out.
A simple pendulum can be described as a point mass and a string. Meanwhile, a physical pendulum is any object whose oscillations are similar to a simple pendulum, but cannot be modeled as a point mass on a string because its mass is distributed over a larger area. The behavior of a physical pendulum can be modeled using the principles of...
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関連する実験動画

Updated: Jan 28, 2026

Determination of Microbial Extracellular Enzyme Activity in Waters, Soils, and Sediments using High Throughput Microplate Assays
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簡便なマイクロプレートアッセイによる光触媒活性評価の加速

Yohei Cho1,2, Osamu Tagami1, Kyo Yanagiyama1

  • 1Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan.

ACS environmental Au
|January 26, 2026
PubMed
まとめ

本研究は、労働力と時間を大幅に削減する96ウェルマイクロプレートを用いたハイスループット光触媒アッセイを紹介する。この新しい方法は、太陽エネルギー用途の材料の迅速なスクリーニングを可能にする。

キーワード:
ハイスループットスクリーニング速度論解析マイクロプレートアッセイ光触媒水処理

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科学分野:

  • 材料科学
  • 化学工学
  • 光触媒

背景:

  • 光触媒の研究は太陽エネルギーを利用するために重要であるが、材料評価の遅さによって妨げられている。
  • 光触媒性能を評価するための現在の方法は、労働集約的で時間がかかる。
  • 新規光触媒の発見を加速するためには、ハイスループットスクリーニング方法が必要とされている。

研究 の 目的:

  • 光触媒活性を評価するための、シンプルで省力化されたハイスループットアッセイを開発すること。
  • 秤量からデータ解析までの光触媒スクリーニングのワークフローを合理化すること。
  • 測定中の光触媒粉末を溶液から分離するボトルネックを解消すること。

主な方法:

  • 同時サンプル処理のために96ウェルマイクロプレートフォーマットを利用しました。
  • 秤量、マイクロプレートの準備、光照射、および分光測定を統合したプロトコルを開発しました。
  • 吸光度と時間的プロファイルに対する染料と粉末の共存の影響を調査しました。

主要な成果:

  • 粉末と溶液の分離ステップを排除することにより、スループットを大幅に改善し、労働力を削減しました。
  • 正確な測定とハイスループットのための光触媒と染料の濃度の最適化に関するガイドラインを確立しました。
  • 吸収と散乱の原理に依存しているため、様々な染料に適用可能なアッセイの汎用性を示しました。

結論:

  • 開発されたアッセイは、ハイスループットの光触媒性能評価（約500サンプル/日）を可能にします。
  • この方法は、広大な材料空間の探索を容易にし、新しい光触媒の発見を加速します。
  • このプロトコルは、太陽エネルギー用途の材料の効率的なスクリーニングの基盤を提供します。