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Precipitation of Ions03:11

Precipitation of Ions

25.4K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
25.4K
Damped Oscillations01:07

Damped Oscillations

6.2K
In the real world, oscillations seldom follow true simple harmonic motion. A system that continues its motion indefinitely without losing its amplitude is termed undamped. However, friction of some sort usually dampens the motion, so it fades away or needs more force to continue. For example, a guitar string stops oscillating a few seconds after being plucked. Similarly, one must continually push a swing to keep a child swinging on a playground.
Although friction and other non-conservative...
6.2K
Forced Oscillations01:06

Forced Oscillations

6.3K
When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.
6.3K
Precipitation Gravimetry01:03

Precipitation Gravimetry

12.8K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
12.8K
Precipitation Processes01:12

Precipitation Processes

5.0K
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
5.0K
Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

4.8K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
4.8K

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Generation of Local CA1 γ Oscillations by Tetanic Stimulation
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Generation of Local CA1 γ Oscillations by Tetanic Stimulation

Published on: August 14, 2015

8.5K

降雨によって引き起こされる振動は,オープンなセルラー雲のフィールドで発生します.

Graham Feingold1, Ilan Koren, Hailong Wang

  • 1NOAA Earth System Research Laboratory (ESRL), Chemical Sciences Division, Boulder, Colorado 80305, USA. graham.feingold@noaa.gov

Nature
|August 13, 2010
PubMed
まとめ
この要約は機械生成です。

雲の場は振動する細胞パターンを形成し,地球の気候に影響を与えます. この研究は,降水が雲のパターンの自己組織化を促進し,太陽光の反射と気候モデリングに影響を及ぼすことを明らかにしています.

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Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light
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Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light

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Generation of Local CA1 γ Oscillations by Tetanic Stimulation
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Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light
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Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
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科学分野:

  • 大気科学 大気科学
  • 気候科学 気候科学
  • 気象学 気象学 気象学

背景:

  • 雲のパターンは,太陽光の反射を変化させることで,地球の気候に大きな影響を与えます.
  • 細胞雲の構造は,組織化されたコンベクションと関連しており,降水に影響するエアロゾールの影響を受けています.
  • 雲細胞の形成と進化を駆動するメカニズムは依然として十分に理解されていないため,気候シミュレーションを妨げています.

研究 の 目的:

  • オープン細胞雲のパターンの形成と振動の背後にある物理的メカニズムを解明する.
  • 落下する雲が自己組織化して振動パターンを形成する方法を理解する.
  • グローバルな反射力に対する雲の影響のシミュレーションを改善するために.

主な方法:

  • 雲のパターンを観察するために衛星画像の分析.
  • クラウドダイナミクスをシミュレートするために数値モデルの利用.
  • 雲細胞の進化における降雨の役割の調査.

主要な成果:

  • 降雨する雲は,振動する開いた細胞パターンを生成します.
  • 降雨によって引き起こされる下流と出流は相互作用し,表面収束地帯を形成する.
  • これらのゾーンは新しい雲の形成を誘発し,自己組織化,振動するシステムにつながります.

結論:

  • 雲の場パターンは,降雨プロセスによって駆動される動的,振動するシステムです.
  • これらの振動を理解することは,正確な気候モデリングと,雲によって引き起こされる気候変動の影響を予測するために極めて重要です.
  • この研究は,大気コンベクションにおける新しい自己組織化メカニズムを明らかにしている.