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関連する概念動画

Breathing01:05

Breathing

The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...
Mechanism of Breathing I: Inspiration01:30

Mechanism of Breathing I: Inspiration

Introduction to Inspiration: The Respiratory System in Action
The respiratory system, an essential network for breathing, comprises the conducting and respiratory zones, each playing a crucial role in the overall process of respiration. Let us explore the detailed mechanism of inspiration, or inhalation, which is the first phase of the respiratory cycle.
Pathway of Air during Inspiration
During inspiration, air enters our body through the nose or mouth and moves through the conducting zone,...
Alterations in Respiration II01:30

Alterations in Respiration II

There are numerous types of normal and abnormal respiration. Based on ventilatory movements, breathing patterns are classified as regular, deep, or shallow. Examples include Biot's breathing, Cheyne-Stokes respiration, Kussmaul's breathing, hyperventilation, and hypoventilation. Each pattern is clinically significant and aids in evaluating patients.
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
Mechanism of Breathing II: Expiration01:23

Mechanism of Breathing II: Expiration

The Physiology of Expiration: A Seamless Respiratory Process
Expiration, or exhaling, is a complex physiological process that begins as the inspiratory muscles begin to relax. This relaxation triggers a series of events that epitomize the efficiency of the respiratory system.
Mechanism of Expiration:
Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
Respiratory Volumes01:15

Respiratory Volumes

Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...

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Updated: Jun 20, 2026

A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways
09:39

A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways

Published on: May 9, 2016

"呼吸する"膀.

Shaoyong Yu1, Tony Azzam, Isabelle Rouiller

  • 1Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 2K6, Canada.

Journal of the American Chemical Society
|September 3, 2009
PubMed
まとめ
この要約は機械生成です。

この研究では,独特の"呼吸"能力を持つpH反応性水泡を導入し,サイズを逆転的に変化させ,種の拡散を可能にします. これらのスマートベシクルは,急速な陽子輸送と制御された透過性を提供します.

さらに関連する動画

Breath Collection from Children for Disease Biomarker Discovery
06:09

Breath Collection from Children for Disease Biomarker Discovery

Published on: February 14, 2019

Method to Obtain Pattern of Breathing in Senescent Mice through Unrestrained Barometric Plethysmography
09:13

Method to Obtain Pattern of Breathing in Senescent Mice through Unrestrained Barometric Plethysmography

Published on: April 28, 2020

関連する実験動画

Last Updated: Jun 20, 2026

A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways
09:39

A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways

Published on: May 9, 2016

Breath Collection from Children for Disease Biomarker Discovery
06:09

Breath Collection from Children for Disease Biomarker Discovery

Published on: February 14, 2019

Method to Obtain Pattern of Breathing in Senescent Mice through Unrestrained Barometric Plethysmography
09:13

Method to Obtain Pattern of Breathing in Senescent Mice through Unrestrained Barometric Plethysmography

Published on: April 28, 2020

科学分野:

  • マテリアルサイエンス 材料科学
  • ポリマー化学のポリマー化学について
  • ナノテクノロジー ナノテクノロジー

背景:

  • 膀は,薬物投与とナノテクノロジーにおいて極めて重要です.
  • pH反応性材料は,膀の特性に対するダイナミックな制御を提供します.
  • 制御された膨らみと浸透性は,高度なアプリケーションの鍵です.

研究 の 目的:

  • pH反応性水泡のための新しいトライブロック共ポリマーを合成し,特徴づけること.
  • これらの膀のpH誘発の構造変化と体積移行を調査する.
  • 膀の浸透性とイオン輸送に対するpH変化の影響を評価する.

主な方法:

  • ポリエチレン酸化物) -ブロック -ポリステルレン -ブロック -ポリエチルアミノエチルメタクリlate (PEO-b-PS-b-PDEA) をATRP経由で合成する.
  • 高いpH (約0.05) で膀の自己組織化 10.4) を参照してください.
  • 構造分析のための低温伝送電子顕微鏡 (cryo-TEM).
  • 膀の大きさ,壁の厚さ,そして透透性のpH依存的な特徴付け.

主要な成果:

  • 膀は3層の壁構造 (PS-PDEA-PS) を表し,pHに依存する腫れがある.
  • 大きく,逆戻り可能な体積変化 (約 7倍) は,PDEAのプロトン化と水分化によるpHの低下とともに発生する.
  • pH値の低下は,膀のサイズ,壁の厚さ,およびPS層の割れ目を増加させ,水と陽子の透過性を高めます.
  • 急速なリラックス時間 (約. 1分) で,pH10.4から3.4.4の範囲で高い可逆性が見られた.

結論:

  • 合成されたPEO-b-PS-b-PDEA共ポリマーは,調節可能な特性を有する堅固でpHに反応する膀を形成します.
  • "呼吸"メカニズムは,種の制御された拡散と急速な陽子輸送を可能にします.
  • これらの水泡は,スマートな薬剤投与システムなどの,ダイナミックな体積変化と制御された浸透性を要求するアプリケーションの可能性を秘めています.