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

Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

1.2K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
1.2K
Phase Transitions: Vaporization and Condensation02:39

Phase Transitions: Vaporization and Condensation

18.7K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase...
18.7K
Phase Transitions: Sublimation and Deposition02:33

Phase Transitions: Sublimation and Deposition

18.0K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
18.0K
Types of Coprecipitation01:10

Types of Coprecipitation

886
Coprecipitation is the contamination of a precipitate by otherwise soluble species and occurs via different processes. In colloidal precipitates, coprecipitation occurs via surface adsorption. For instance, barium sulfate has a primary layer of adsorbed barium ions and a secondary layer of nitrate counterions. This results in contamination of the precipitate by barium nitrate.
Sometimes, ions in a crystal lattice can undergo isomorphous replacement by inclusions of similar charge and size. For...
886
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

17.6K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
17.6K
Precipitation Processes01:12

Precipitation Processes

604
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...
604

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

Direct evidence for magnetohydrodynamic disk winds driving rotating outflows in protostar HOPS 358.

Nature communications·2026
Same author

Irradiation of methanol ice on a sulfur-rich dust analogue at 25 K: a mid-infrared spectroscopic study.

Physical chemistry chemical physics : PCCP·2026
Same author

Accretion bursts crystallize silicates in a planet-forming disk.

Nature·2026
Same author

Discovery of the Seven-ring Polycyclic Aromatic Hydrocarbon Cyanocoronene (C<sub>24</sub>H<sub>11</sub>CN) in GOTHAM Observations of TMC-1.

The astrophysical journal. Letters·2025
Same author

Detection of interstellar 1-cyanopyrene: A four-ring polycyclic aromatic hydrocarbon.

Science (New York, N.Y.)·2024
Same author

The cool brown dwarf Gliese 229 B is a close binary.

Nature·2024
Same journal

Retraction Note: NSD2 targeting reverses plasticity and drug resistance in prostate cancer.

Nature·2026
Same journal

Enhanced B cell priming induces broadly neutralizing HIV-1 apex antibodies.

Nature·2026
Same journal

Vaccination elicits HIV broadly neutralizing antibodies in primates.

Nature·2026
Same journal

Child online safety needs more than social-media bans.

Nature·2026
Same journal

Ebola preparedness must start with ecosystems and before humans show symptoms.

Nature·2026
Same journal

AI tools can speed up thinking, but evidence still comes from the lab bench.

Nature·2026
関連記事をすべて見る

関連する実験動画

Updated: Sep 15, 2025

Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System
09:44

Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System

Published on: June 5, 2014

12.9K

埋め込まれた原惑星円盤で検出された耐火性固体凝縮

M K McClure1, Merel Van't Hoff2,3, Logan Francis4

  • 1Leiden Observatory, Leiden University, Leiden, The Netherlands. mcclure@strw.leidenuniv.nl.

Nature
|July 16, 2025
PubMed
まとめ
この要約は機械生成です。

天文学者は原星HOPS-315の周りに 惑星の形成の最初の瞬間を検出しました この観測により,太陽系のような新しい惑星系を 構築するのに必要な最初の熱いガスと固体が明らかになりました

さらに関連する動画

Simulation of the Planetary Interior Differentiation Processes in the Laboratory
06:04

Simulation of the Planetary Interior Differentiation Processes in the Laboratory

Published on: November 15, 2013

11.7K
Synthesis and Exfoliation of Discotic Zirconium Phosphates to Obtain Colloidal Liquid Crystals
08:54

Synthesis and Exfoliation of Discotic Zirconium Phosphates to Obtain Colloidal Liquid Crystals

Published on: May 25, 2016

8.6K

関連する実験動画

Last Updated: Sep 15, 2025

Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System
09:44

Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System

Published on: June 5, 2014

12.9K
Simulation of the Planetary Interior Differentiation Processes in the Laboratory
06:04

Simulation of the Planetary Interior Differentiation Processes in the Laboratory

Published on: November 15, 2013

11.7K
Synthesis and Exfoliation of Discotic Zirconium Phosphates to Obtain Colloidal Liquid Crystals
08:54

Synthesis and Exfoliation of Discotic Zirconium Phosphates to Obtain Colloidal Liquid Crystals

Published on: May 25, 2016

8.6K

科学分野:

  • * 天文学と天体物理学
  • * 惑星科学
  • * 原惑星円盤の進化

背景:

  • * 地球上の惑星は 熱い冷却ガスから発生した 恒星間や岩石の固体から形成されます
  • * このガスから再凝縮された最初の高温鉱物は,惑星の形成の始まりを表しています.
  • * この熱いガスの起源と 他の惑星系における惑星形成における役割は まだ十分に理解されていません

研究 の 目的:

  • * 発見と特徴付け
  • t=0 とする.
  • 惑星の形成の瞬間です
  • * 新しい惑星系の構成と起源を調査する
  • * 初期の太陽系形成過程を他のシステムで観測されたものと比較する.

主な方法:

  • * ジェームズ・ウェブ宇宙望遠鏡 (JWST) と アタカマ大ミリメートル射線 (ALMA) を使った若き原星HOPS-315の観測.
  • ガスと鉱物の組成を特定するために赤外線とミリメートル波長データを分析する.
  • * 凝縮と円盤構造モデルとの観測データの比較

主要な成果:

  • *HOPS-315の内部ディスク (2.2AU以内) にある暖かいシリコン一酸化物 (SiO) ガスと結晶シリケート鉱物の貯蔵庫の検出
  • * 新しい惑星系の初期構成要素として これらの物質を特定する
  • 太陽系に似た 耐火性固体が 形成されていることを示唆しています

結論:

  • * この研究は,惑星形成の"t=0"の瞬間を初めて天文学的に検出したものです.
  • * 内部ディスク環境は,恒星間固体の昇華と,その後の耐火材料の再凝縮によって形成されます.
  • *これらの過程は,太陽系における耐火凝縮に匹敵するスケールで起こり,惑星形成の普遍性についての洞察を提供します.