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

Sustainable Development01:43

Sustainable Development

15.0K
As the human population continues to grow and use resources, we must be mindful of our planet’s natural limits. Sustainable development provides a pathway to maintain and improve human life now while also ensuring that future generations will have the resources that they need. The long-term success of sustainability efforts rests on understanding the interplay between human actions and ecological systems.
15.0K
Derivatives of the Trigonometric Functions01:26

Derivatives of the Trigonometric Functions

116
The motion of a Ferris wheel rotating at a constant speed provides an intuitive model for understanding trigonometric functions and their derivatives. As a rider moves along the circular path, the vertical height above the ground changes smoothly and periodically over time. This vertical motion can be accurately represented by a sine function, reflecting the repeating pattern of ascent and descent inherent to circular motion.Height and Rate of ChangeIf the rider’s height is modeled by a...
116
Derivatives of Logarithmic Functions01:22

Derivatives of Logarithmic Functions

72
Logarithmic and Exponential RelationshipA logarithmic function is the inverse of an exponential function. If y = logb x then, it can be rewritten as by = x. This relationship allows for implicit differentiation, making logarithmic functions useful in calculus. Logarithmic scales are widely used to represent data that span multiple orders of magnitude, such as earthquake magnitudes (Richter scale) and sound intensity (decibels).Differentiation of Logarithmic FunctionsTo differentiate y = logb x,...
72
Transfer Function in Control Systems01:21

Transfer Function in Control Systems

1.6K
The transfer function is a fundamental concept in the analysis and design of linear time-invariant (LTI) systems. It offers a concise way to understand how a system responds to different inputs in the frequency domain. It serves as a bridge between the time-domain differential equations that describe system dynamics and the frequency-domain representation that facilitates easier manipulation and analysis.
To derive the transfer function, consider a general nth-order linear time-invariant...
1.6K
Derivatives of Simple Functions01:27

Derivatives of Simple Functions

127
Derivatives quantify the rate of change of a function and can be interpreted geometrically as the slope of a straight line or the slope of a tangent line to a curve at a given point. In the context of a roller coaster, the derivative of the function describing the track’s horizontal position provides a mathematical description of how steep the path is at any location along the ride.Constant and Linear PathsA horizontal segment of a roller coaster can be modeled by a constant function,...
127
Second Derivatives of Implicit Functions01:29

Second Derivatives of Implicit Functions

65
Elliptical arches are fundamental in architectural and structural engineering, offering aesthetic appeal and structural efficiency. The shape of an elliptical arch follows a constrained geometric relationship where the height and horizontal position are implicitly related. This means that the height y cannot be explicitly expressed as a function of the horizontal position x, necessitating implicit differentiation for slope and curvature analysis.The equation of an ellipse centered at the origin...
65

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

Dual-Functional Antibiotic Adjuvants Based on Antibacterial Polyesters With Guanidinium and Boronic Acid Motifs.

Macromolecular bioscience·2026
Same author

Fuscan: a robust DNA fusion caller for targeted sequencing data in cancer diagnostics.

Bioinformatics advances·2026
Same author

Association between systemic immune-inflammation index and postoperative optical quality in the early recovery phase after cataract surgery: a retrospective study.

Frontiers in medicine·2026
Same author

Risk factors for age-related macular degeneration: an umbrella analysis of systematic review and meta-analysis.

Frontiers in medicine·2026
Same author

Childhood abuse, adolescent legal cynicism, and early adult criminal justice involvement: A five-wave longitudinal analysis of timing, typology, and cumulative exposure.

Child abuse & neglect·2026
Same author

Deciphering Polyphenol Interactions with Poly(<sub>L</sub>-proline) and Polysarcosine.

Biomacromolecules·2026

関連する実験動画

Updated: Jan 27, 2026

Facile Preparation of 4-Substituted Quinazoline Derivatives
11:51

Facile Preparation of 4-Substituted Quinazoline Derivatives

Published on: February 15, 2016

12.3K

4-ヒドロキシプロリン由来の持続可能なポリエステル:制御されたリング開きポリメリゼーション,完全なリサイクル,および簡単な機能化

Jingsong Yuan1, Wei Xiong1, Xuhao Zhou1

  • 1Beijing National Laboratory for Molecular Sciences, Center for Soft Matter Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , People's Republic of China.

Journal of the American Chemical Society
|March 21, 2019
PubMed
まとめ

化学的にリサイクル可能なポリエステル (PTE) は,バイオソース材料から合成されました. これらの新しいポリマーは プラスチックの廃棄物に対する持続可能な解決策であり 温和な条件下で効率的なモノマーリサイクルを可能にします

さらに関連する動画

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
10:22

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer

Published on: November 30, 2020

3.9K
Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization
10:54

Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization

Published on: June 19, 2015

10.2K

関連する実験動画

Last Updated: Jan 27, 2026

Facile Preparation of 4-Substituted Quinazoline Derivatives
11:51

Facile Preparation of 4-Substituted Quinazoline Derivatives

Published on: February 15, 2016

12.3K
Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
10:22

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer

Published on: November 30, 2020

3.9K
Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization
10:54

Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization

Published on: June 19, 2015

10.2K

科学分野:

  • ポリマー化学
  • 持続可能な材料科学
  • 有機合成

背景:

  • 石油ベースのプラスチックは 重要な環境とエネルギー問題をもたらします
  • 化学的に再利用可能な新しいポリマーの代替品が不可欠です
  • 現在のリサイクル方法は プラスチックのライフサイクルを 完全に処理できないことが多いのです

研究 の 目的:

  • バイオソースのポリエステル (PTE) の新種を導入し,高いポリメリ化性と化学的リサイクル性を実現する.
  • ポリマー合成とモノマー回収のための経済的かつ環境に優しいプロセスを開発する.
  • 高価な材料の応用におけるこれらのPTEの潜在能力を探求する.

主な方法:

  • 4-ヒドロキシプロリンからストレートされたチオラクトン単体合成.
  • 弱塩基を用いた制御されたリング開封ポリメリゼーション (ROP).
  • プロパティチューニングのためのコポリマー化とサイドチェーン機能化.
  • 周りの温度から中等な温度で,稀な溶液で選択的脱ポリマー化.
  • 機械的洞察のための密度関数理論 (DFT).

主要な成果:

  • 高いモラー質量 (最大259kgmol−1) と狭い分散度 (1.15以下) を達成した.
  • コポリメリゼーションと機能化によって調整可能なポリマー特性を示した.
  • 温和な条件下でPTEからクリーンなモノマーをリサイクルした.
  • ROP/デポリメリゼーションメカニズムについての洞察を DFT 計算から得られた.

結論:

  • バイオソースのPTEは,ポリマー開発のための持続可能で汎用的なプラットフォームを提供します.
  • 独特のRPとデポリメリゼーション化学は,効率的なモノマーリサイクリングを可能にします.
  • これらのPTEは,光学プラスチック,自己燃焼ポリマー,およびバイオマテリアルでの応用に期待されています.