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Introduction to Chemical Reactions01:23

Introduction to Chemical Reactions

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All chemical reactions begin with a reactant, the general term for one or more substances entering the reaction. Sodium and chloride ions, for example, are the reactants in the production of table salt. One or more substances produced by a chemical reaction are called the product. Chemical reactions follow the law of conservation of mass, which means that matter cannot be created nor destroyed in a chemical reaction. The components of the reactants—the number of atoms and the...
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Chemical Synapses01:26

Chemical Synapses

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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
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Chemical Reactions01:19

Chemical Reactions

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A chemical reaction is a process by which the bonds in the atoms of substances are rearranged to generate new substances. Matter cannot be created or destroyed in a chemical reaction—the same type and number of atoms that make up the reactants are still present in the products. Merely, the rearrangement of chemical bonds produces new compounds.
Chemical Reactions Rearrange Atoms into New Substances
A chemical reaction takes starting materials—the reactants—and changes them...
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Chemical Signaling in the Endocrine System01:08

Chemical Signaling in the Endocrine System

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A signaling cascade is a series of events that facilitates the transmission of information within or between cells, culminating in a targeted response in the recipient cell. As chemical messengers, hormones are pivotal in initiating and modulating these intricate signaling cascades based on their solubility.
Lipid-soluble hormones, such as steroid hormones, demonstrate an intracellular action. These hormones traverse cell membranes due to their lipid nature. Once inside the target cell, they...
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Overview of Cell Signaling01:23

Overview of Cell Signaling

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Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate with the environment.
Cells respond to many types of information, often through receptor proteins positioned on the membrane. For example, skin cells respond to and transmit touch...
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Tactile and Chemical Senses

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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Generating Controlled, Dynamic Chemical Landscapes to Study Microbial Behavior
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反応性化学システムによる化学情報処理

Luca Gabrielli1, Lorenzo Goldin1, Sushmitha Chandrabhas1

  • 1Department of Chemical Sciences, University of Padova, via F. Marzolo 1, Padova 35131, Italy.

Journal of the American Chemical Society
|January 12, 2024
PubMed
まとめ
この要約は機械生成です。

合成ナノリアクターは,化学反応を制御するトリガーとしてヌクレオシドを使用することで,細胞信号を模倣する. このシステムは 調節可能な反応性と 暫定的な信号処理を証明し 人工生命体のようなシステムに 洞察を与えます

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Assessment of Dictyostelium discoideum Response to Acute Mechanical Stimulation
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科学分野:

  • 化学生物学
  • 合成生物学
  • バイオミメティック・システム

背景:

  • 細胞は外部刺激を使って 情報処理の化学反応を 精密に制御します
  • 生命のような性質を持つ合成システムを開発するには 複雑な環境で制御された化学反応が必要です

研究 の 目的:

  • 自然の信号伝達経路を模倣する 合成システムを構築する
  • 複雑な混合物における化学反応の 制御可能かつ一時的な上調を証明する.

主な方法:

  • ナノリアクターの自己組み立てのための化学トリガーとしてモノフォスファート核酸化物を利用する.
  • 異なるアセンブリを模倣し,特定の経路を活性化するために異なるヌクレオチドを使用します.
  • 化学的トリガーを除去することで 暫定的な反応性を確保するために 酵素を組み込む

主要な成果:

  • モノフォスファート核酸化物は,低マイクロモラー反応剤を含む反応を上調する自己組み立てナノ反応器です.
  • 特定のヌクレオチドは選択的に異なる経路を活性化し,定義された入力-出力関係を生み出します.
  • システムには一時的な化学的活性があり,入力トリガーに基づいて異なる出力を生成します.

結論:

  • 合成システムは化学反応を制御することで 初期段階の信号伝導を成功裏に模倣します
  • このアプローチは,化学物質の入力と特定の出力分子の間のリンクを確立します.
  • システムの一時的な性質は,生物学的システムに似た動的信号処理を可能にします.