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Magnetic Declination01:19

Magnetic Declination

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Magnetic declination is the angle between true north, which aligns with the Earth's rotational axis, and magnetic north, which follows the direction of the Earth's magnetic field. This discrepancy exists because the magnetic poles do not coincide with the geographic poles. The value of magnetic declination depends on the observer's location on Earth and is subject to changes over time due to the dynamic nature of the Earth's magnetic field.The declination is called eastern when magnetic north...
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The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
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Primary distribution systems deliver electrical power from substations to consumers through various voltage classes, with 15-kV class voltages being predominant among U.S. utilities. Older 2.5- and 5-kV classes are being replaced by 15-kV primaries, while higher 25- to 34.5-kV classes are used in high-density urban areas and rural regions with long feeders. Three-phase, four-wire multigrounded systems are widely employed for balanced power delivery, using the neutral wire as a grounding point.
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サブクリニカル・プライマリ・アルドステロニズムとeGFRの低下

Gregory L Hundemer1,2, Louis-Charles Desbiens3, Mohsen Agharazii4,5

  • 1Department of Medicine, Division of Nephrology, University of Ottawa, Ottawa, Ontario, Canada.

Journal of the American Society of Nephrology : JASN
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PubMed
まとめ
この要約は機械生成です。

アルドステロンとレニンの比率 (ARR) の上昇によって示されるサブクリニック原発アルドステロン症は,腎臓機能の低下がより迅速に起こることに関連しています. 低レニンのレベルは,血圧に関係なく,推定グルメルフィルタレーション率 (eGFR) の低下の増加と相関しています.

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科学分野:

  • ネフロロジーはネフロロジーを用います.
  • エンドクリノロジー エンドクリノロジー
  • 心血管科学の研究について

背景:

  • 主要アルドステロニズムは腎臓機能の低下を加速する.
  • 主要アルドステロン症の亜臨床的形態は一般的ですが,腎臓機能への影響は不明です.

研究 の 目的:

  • サブクリニカル・プライマリ・アルドステロニズムマーカーと推定グローメルーラ濾過率 (eGFR) の低下との関連を調査する.

主な方法:

  • 976人のカナダ人成人 (40~69歳) を対象とした前向きなコホート研究.
  • 測定されたアルドステロン,レニン,クレアチニン,シスタチンC.
  • アルドステロン,レニン,アルドステロンとレニンの比率 (ARR) との関連性を評価するために,多変量線形混合回帰を用いて,eGFRの5~7年間の低下を評価した.

主要な成果:

  • 高いARRは,時間の経過とともに11%の急激なeGFR減少と関連していました.
  • 低レニンレベルは,時間の経過とともに16%の急激なeGFR減少と関連していました.
  • アルドステロン単独では,eGFR変化と有意な関連性は示されなかった.

結論:

  • 増加したARRと抑制されたレニンは,独立して加速されたeGFR減少と関連しています.
  • これらの関連性は,血圧レベルに関係なく持続します.