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関連する概念動画

Nuclear Stability03:18

Nuclear Stability

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Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together...
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RNA Stability01:53

RNA Stability

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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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Stability01:28

Stability

414
The time response of a linear time-invariant (LTI) system can be divided into transient and steady-state responses. The transient response represents the system's initial reaction to a change in input and diminishes to zero over time. In contrast, the steady-state response is the behavior that persists after the transient effects have faded.
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...
414
Stability of structures01:14

Stability of structures

513
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
513
Pole and System Stability01:24

Pole and System Stability

959
The transfer function is a fundamental concept representing the ratio of two polynomials. The numerator and denominator encapsulate the system's dynamics. The zeros and poles of this transfer function are critical in determining the system's behavior and stability.
Simple poles are unique roots of the denominator polynomial. Each simple pole corresponds to a distinct solution to the system's characteristic equation, typically resulting in exponential decay terms in the system's...
959
Multimachine Stability01:25

Multimachine Stability

574
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
574

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関連する実験動画

Updated: Jan 29, 2026

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
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Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

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フォスフィン安定化ディガーマヴィニリデン

Kilian M Krebs1, Dominik Hanselmann1, Hartmut Schubert1

  • 1Institut für Anorganische Chemie , Eberhard Karls Universität Tübingen , Auf der Morgenstelle 18 , 72076 Tübingen , Germany.

Journal of the American Chemical Society
|February 9, 2019
PubMed
まとめ

研究者らは,ゲルミレン・フォスフィン・ルイスペアとジルマニウム二塩化物から,新しいフォスフィン安定型ディゲルマビニリデンを合成した. この化合物は [2+2] サイクル添加を経て,ゲルマニウム原子を移転し,オルガノゲルマニウムニトリドを形成する.

さらに関連する動画

How to Stabilize Protein: Stability Screens for Thermal Shift Assays and Nano Differential Scanning Fluorimetry in the Virus-X Project
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Evaluation of the Storage Stability of Extracellular Vesicles
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関連する実験動画

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Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
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How to Stabilize Protein: Stability Screens for Thermal Shift Assays and Nano Differential Scanning Fluorimetry in the Virus-X Project
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Evaluation of the Storage Stability of Extracellular Vesicles
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Evaluation of the Storage Stability of Extracellular Vesicles

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科学分野:

  • 有機金属化学
  • メイングループ 化学
  • 非有機合成

背景:

  • ゲルミレン・フォスフィン・ルイス・ペアは,反応性のある中間物質である.
  • 安定した低価ゲルマニウム化合物は重要な関心事である.
  • ゲルミレンの反応性を理解することは,新しいゲルマニウムベースの材料の開発に不可欠です.

研究 の 目的:

  • 新しいフォスフィンで安定したディゲルマビニリデンを合成し特徴づけること.
  • ディゲルマビニリデンの電子構造を調べる
  • サイクロアディションと原子抽象反応におけるディゲルマビニリデンの反応性を調べる.

主な方法:

  • ゲルマニウム二塩化物との分子内ゲルミレン・フォスフィン・ルイスペアの反応.
  • マグネシウム ((I) またはナトリウムを使用して,生成された塩素代用ゲルミルゲルミレン添加物の減少.
  • X線結晶学,密度関数理論 (DFT) の計算,アダマンチルフォスファルキンおよびアダマンチラジドによる反応を用いた特徴化.

主要な成果:

  • 塩素置換されたゲルミルゲルミレンのフォスフィン添加物の合成 92%の収量.
  • 72%の収量 (Mg減量) または52%の収量 (Na減量) で,フォスフィンで安定したディゲルマビニリデンの分離.
  • アダマンチルフォスファルキンとアダマンチラジドのテトラメリックオルガノゲルマニウムニトリドの [2+2] サイクル添加製品の特徴

結論:

  • 新しいフォスフィンで安定したディゲルマビニリデンは成功裏に合成され,特徴づけられました.
  • ディゲルマビニリデンは,サイクロアディションと原子抽象反応に参加して,ユニークな反応性を示す.
  • DFT計算は,このゲルマニウム化合物の電子構造の洞察を提供します.