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関連する概念動画

¹H NMR of Conformationally Flexible Molecules: Temporal Resolution00:52

¹H NMR of Conformationally Flexible Molecules: Temporal Resolution

1.3K
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
1.3K
¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR01:15

¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR

1.7K
The axial and equatorial protons in cyclohexane can be distinguished by performing a variable-temperature NMR experiment. In this process, except for one proton, the remaining eleven protons are replaced by deuterium. The deuterium substitution avoids the possible peak splitting caused by the spin-spin coupling between the adjacent protons. The remaining proton flips between the axial and equatorial positions.
1.7K
Load along a Single Axis01:29

Load along a Single Axis

632
In structural engineering, the analysis of beams subjected to varying loads is a critical aspect of understanding the behavior and performance of these structural elements. A common scenario involves a beam subjected to a combination of different load distributions.
Consider a beam of length L subjected to a varying load, which is a combination of parabolic and trapezoidal load distribution along the x-axis. In this case, it is essential to determine the resultant loads, their locations, and...
632
Single Pipe Systems01:24

Single Pipe Systems

435
In pipe flow analysis, problems are typically categorized into three types — Type I, Type II, and Type III — based on the known parameters and the desired outcome. Each type of problem addresses specific engineering requirements using fluid properties, pipe characteristics, and operational conditions.
In a Type I problem, fluid properties (density and viscosity), pipe characteristics (including diameter, length, and surface roughness), and the flow rate or average velocity are...
435
Single-pass Transmembrane Proteins01:25

Single-pass Transmembrane Proteins

6.5K
Integral membrane proteins are tightly associated with the cell membrane and play a crucial role in cell communication, signaling, adhesion, and transport of the molecules. Some integral membrane proteins are present only in the membrane monolayer. For example, the enzyme fatty acid amide hydrolase is present in the cytoplasmic side of the membrane monolayer. In contrast, another type of integral membrane protein, also known as a transmembrane protein, spans across the membrane. Transmembrane...
6.5K
Angular Momentum: Single Particle01:10

Angular Momentum: Single Particle

7.6K
Angular momentum is directed perpendicular to the plane of the rotation, and its magnitude depends on the choice of the origin. The perpendicular vector joining the linear momentum vector of an object to the origin is called the “lever arm.” If the lever arm and linear momentum are collinear, then the magnitude of the angular momentum is zero. Therefore, in this case, the object rotates about the origin such that it lies on the rim of the circumference defined by the lever arm...
7.6K

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関連する実験動画

Updated: Jan 21, 2026

Reusable Single Cell for Iterative Epigenomic Analyses
10:28

Reusable Single Cell for Iterative Epigenomic Analyses

Published on: February 11, 2022

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シングルユースおよび再利用可能な気管支鏡のコストに関する考察

Jeffrey Thiboutot, Dylan Wang, Cheryl Pai

    Respiration; international review of thoracic diseases
    |January 19, 2026
    PubMed
    まとめ

    シングルユース気管支鏡（SUFB）は低容量の手順でより費用対効果が高く、再利用可能な気管支鏡（RFB）は高容量の設定でより安価です。費用対効果は、手順の量と機器の艦隊のサイズによって異なります。

    科学分野:

    • 肺学
    • 医療経済学
    • 感染管理

    背景:

    • シングルユース気管支鏡（SUFB）は、携帯性と再利用可能な気管支鏡（RFB）に関連する感染症への懸念から人気が高まっています。
    • SUFBとRFBの比較コスト分析は、医療の意思決定に必要です。

    研究 の 目的:

    • 再利用可能な気管支鏡（RFB）の1回あたりの使用コストを決定すること。
    • 単一の医療ユニット内でRFBの1回あたりの使用コストとシングルユース気管支鏡（SUFB）のコストを比較すること。

    主な方法:

    • 25台のRFBを使用サイクルを通じて追跡した前向き観察研究。
    • マイクロコスト分析には、RFBの資本、サービス、人員配置、および再処理コストが含まれていました。
    • 感度分析では、気管支鏡の艦隊のサイズと手順の量に基づくコストの変動を評価しました。

    主要な成果:

    • RFBの1回あたりの使用コストは198.26ドルから202.40ドルでしたが、SUFBは1回あたり300ドルから400ドルでした。
    • RFBのコストは主に資本とサービスによって駆動され、手順の量と艦隊のサイズによって大きく変動しました。
    • 高容量ユニット（年間900件以上の処置）ではRFBの方が費用対効果が高いことがわかりました。低容量ユニット（年間400件未満の処置）ではSUFBが好まれました。
    キーワード:
    シングルユース気管支鏡再利用可能な気管支鏡費用対効果医療経済学感染管理

    さらに関連する動画

    Scalable, Flexible, and Cost-Effective Seedling Grafting
    09:33

    Scalable, Flexible, and Cost-Effective Seedling Grafting

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    A Flexible Low Cost Hydroponic System for Assessing Plant Responses to Small Molecules in Sterile Conditions
    11:27

    A Flexible Low Cost Hydroponic System for Assessing Plant Responses to Small Molecules in Sterile Conditions

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    関連する実験動画

    Last Updated: Jan 21, 2026

    Reusable Single Cell for Iterative Epigenomic Analyses
    10:28

    Reusable Single Cell for Iterative Epigenomic Analyses

    Published on: February 11, 2022

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    Scalable, Flexible, and Cost-Effective Seedling Grafting
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    Scalable, Flexible, and Cost-Effective Seedling Grafting

    Published on: January 6, 2023

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    A Flexible Low Cost Hydroponic System for Assessing Plant Responses to Small Molecules in Sterile Conditions
    11:27

    A Flexible Low Cost Hydroponic System for Assessing Plant Responses to Small Molecules in Sterile Conditions

    Published on: August 25, 2018

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    結論:

    • SUFBは、低容量の気管支鏡検査ユニットでコストを節約します。
    • 高容量ユニットは、RFBの費用対効果からより多くの利益を得る可能性があります。
    • 各タイプに関連する環境への影響と院内感染のリスクを考慮する必要があります。