Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Determining the pH of Salt Solutions04:08

Determining the pH of Salt Solutions

48.1K
The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution.  In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than 7. For...
48.1K
Responses to Salt Stress02:02

Responses to Salt Stress

14.6K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
14.6K
Electrostatic Boundary Conditions01:16

Electrostatic Boundary Conditions

966
Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
966
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

1.9K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
1.9K
Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

3.7K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para...
3.7K
Predator-Prey Interactions02:39

Predator-Prey Interactions

21.6K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
21.6K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Charge regulation indicates water expulsion from silica surface by cesium cations.

Journal of colloid and interface science·2023
Same author

Thermodynamics of Charge Regulation near Surface Neutrality.

Langmuir : the ACS journal of surfaces and colloids·2022
Same author

Publisher's Note: "A constant-frequency feedback loop for non-contact frequency-modulated atomic force microscopy via root locus: Implemented on a single-board field-programmable gate array device" [Rev. Sci. Instrum. 91, 113702 (2020)].

The Review of scientific instruments·2020
Same author

A constant-frequency feedback loop for non-contact frequency-modulated atomic force microscopy via root locus: Implemented on a single-board field-programmable gate array device.

The Review of scientific instruments·2020
Same author

Sequence-Dependent Deviations of Constrained DNA from Canonical B-Form.

Nano letters·2019
Same author

Common Source of Cryoprotection and Osmoprotection by Osmolytes.

Journal of the American Chemical Society·2019

関連する実験動画

Updated: Feb 4, 2026

Resurrection of Dormant Daphnia magna: Protocol and Applications
07:37

Resurrection of Dormant Daphnia magna: Protocol and Applications

Published on: January 19, 2018

19.5K

ズウィテリオン系オスマライトは,塩で遮断された静電相互作用を復活させる

Roy Govrin1, Shani Tcherner1, Tal Obstbaum1

  • 1Department of Physics and the Russell Berrie Nanotechnology Institute , Technion-Israel Institute of Technology , Technion City, Haifa 3200003 , Israel.

Journal of the American Chemical Society
|October 10, 2018
PubMed
まとめ

ズウィテリオン系オスモライトは塩の作用を相殺する

科学分野:

  • バイオ物理学
  • 物理化学

背景:

  • 細胞は塩からのオスモティックストレスを管理するためにズウィテリオン系オスモライトを使用します.
  • これらの化合物は,高イオン強度環境でタンパク質と酵素の活動を安定させます.
  • しかし,オスモライトの静電的影響は十分に研究されていない.

研究 の 目的:

  • 塩溶液中の静電相互作用にズウィテリオンオスモライトがどのように影響するかを調べる.
  • 充電された表面に塩のスクリーニング効果を調節するオスモライトの役割を決定する.
  • 各種の塩とオスモライトが電気静止力に与える影響を研究する.

主な方法:

  • 原子力顕微鏡を用いて 負の電荷を持つシリカ表面の相互作用を検知した.
  • 5つの異なる塩 (NaCl,KCl,CsCl,MgCl2,CaCl2) と5つのズウィテリオン系オスモライト (ベタイン,プロリン,トリメチラミンN酸化物,グリシン,サルコシン) の混合物を試験した.
  • 静電力の影響を分析するために,溶液濃度とpHを変化させる.

主要な成果:

  • すべての試験されたオスモライトは,静電抵抗に対する塩のスクリーニング効果を低下させた.
  • オスモライトは溶液のスクリーニング長さを増し,陽子とカチオンを消去することによって負面表面電荷を高めました.

さらに関連する動画

Electrostatic Method to Remove Particulate Organic Matter from Soil
04:40

Electrostatic Method to Remove Particulate Organic Matter from Soil

Published on: February 10, 2021

5.2K
Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
08:46

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI

Published on: November 22, 2016

8.2K

関連する実験動画

Last Updated: Feb 4, 2026

Resurrection of Dormant Daphnia magna: Protocol and Applications
07:37

Resurrection of Dormant Daphnia magna: Protocol and Applications

Published on: January 19, 2018

19.5K
Electrostatic Method to Remove Particulate Organic Matter from Soil
04:40

Electrostatic Method to Remove Particulate Organic Matter from Soil

Published on: February 10, 2021

5.2K
Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
08:46

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI

Published on: November 22, 2016

8.2K
  • これらの効果は,水よりもオスモライトのより高い分子分極性に関連しています.
  • オスモライトの水性およびカチオン水分化に依存するオスモライトホフマイスター効果が観察されました.

    • 結論:

    • ズウィテリオン系オスモライトは,生物学的に重要な塩溶液における静電相互作用を著しく変化させる.
    • オスモライトは溶液の性質と表面電荷を変化させることで 静電抵抗を強める.
    • 発見は,研究不足の領域を強調する,細胞細胞クロン相互作用のより現実的なモデルを提供します.