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相关概念视频

Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview

In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then passed on to...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
Composition of Blood Plasma01:24

Composition of Blood Plasma

Blood plasma is a fluid that contains approximately 92% water and 8% solutes. The solutes include various types of proteins, which constitute about 7% of the total solutes in the plasma. The high-molecular-weight proteins—albumins, globulins, and fibrinogen—are essential to plasma function. Albumins, making up about 60% of the plasma proteins, maintain the osmotic balance within blood vessels by preventing excessive water leakage. Additionally, albumins serve as carrier proteins, binding to...
Momentum And Radiation Pressure01:20

Momentum And Radiation Pressure

An object absorbing an electromagnetic wave would experience a force in the direction of propagation of the wave. This force occurs because electromagnetic waves contain and transport momentum. The force accounts for the wave's radiation pressure exerted on the object. Maxwell's prediction was confirmed in 1903 by Nichols and Hull by precisely measuring radiation pressures with a torsion balance. The measuring instrument had mirrors suspended from a fiber kept inside a glass container. Nichols...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.

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Updated: Jul 12, 2026

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
07:17

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

Published on: August 1, 2017

彗星贾科比尼-辛纳:等离子体描述

S J Bame, R C Anderson, J R Asbridge

    Science (New York, N.Y.)
    |April 18, 1986
    PubMed
    概括

    国际彗星探测器 (ICE) 探测器观察到强烈的太阳风与贾科比尼-辛纳彗星的相互作用. 没有检测到弓冲击,但确定了一个过渡区域,和等离子体尾巴,揭示了复杂的彗星等离子体动力学.

    科学领域:

    • * 太空物理 太空物理
    • * 彗星科学 彗星科学
    • * 等离子体物理学

    背景情况:

    • * 了解太阳风与彗星的相互作用对于行星科学至关重要.
    • * 贾科比尼-辛纳彗星为研究这些现象提供了一个独特的自然实验室.

    研究的目的:

    • *分析ICE航天器在与贾科比尼-辛纳彗星相遇期间收集的等离子电子数据.
    • * 调查彗星与太阳风相互作用的结构和动态.
    • * 为了识别上游现象并描述彗星等离子体环境.

    主要方法:

    • *使用洛斯阿拉莫斯等离子电子实验在ICE航天器上的现场测量.
    • * 对电子热流和密度波动的观察.
    • *分析了相互作用区域中的等离子体加热,压缩和减速.

    主要成果:

    • *观察到强烈的太阳风与贾科比尼-辛纳彗星的相互作用,包括电子加热和密度波动.
    • *没有检测到常规的弓冲击;相反,确定了一个过渡区域和.
    • * 观察到冷的中间昏迷和高密度的等离子体尾巴,类似于地球的磁尾巴.

    结论:

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    • * 太阳风与贾科比尼-辛纳彗星的相互作用创造了一个复杂的等离子体环境,没有明显的弓冲击.
    • *彗星的离子吸收和行星间磁场罩可能有助于观测到的等离子体结构.
    • *这些发现为彗星环境中的等离子体尾部形成和磁尾状结构提供了洞察力.