Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

SN2 Reaction: Mechanism02:27

SN2 Reaction: Mechanism

14.4K
The kinetic studies of SN2 reactions suggest an essential feature of its mechanism: it is a single-step process without intermediates. Here, both the nucleophile and the substrate participate in the rate-determining step.
The presence of the more electronegative halogen in the substrate creates a polarized carbon-halide bond. The halide pulls the electron cloud generating an electrophilic center at the carbon atom. Thus, the carbon atom carries a partial positive charge while the halide has a...
14.4K
Radical Reactivity: Overview01:11

Radical Reactivity: Overview

2.1K
Radicals, the highly reactive species, gain stability by undergoing three different reactions. The first reaction involves a radical-radical coupling, in which a radical combines with another radical, forming a spin‐paired molecule. The second reaction is between a radical and a spin‐paired molecule, generating a new radical and a new spin‐paired molecule. The third reaction is radical decomposition in a unimolecular reaction, forming a new radical and a spin‐paired...
2.1K
The Two-State Receptor Model01:29

The Two-State Receptor Model

2.0K
The two-state receptor model explains a drug's interaction with receptors, such as G protein-coupled receptors and ligand-gated ion channels, to induce or inhibit a biological response. When no natural ligands are present, a receptor exists in an equilibrium of inactive (Ri) and active (Ra) conformations. The inactive form does not produce a response, while the active form generates a basal effect known as constitutive activity.
The binding affinity of a drug determines its interaction with...
2.0K
Adrenergic Neurons: Neurotransmission01:27

Adrenergic Neurons: Neurotransmission

3.8K
Postganglionic sympathetic fibers (except those supplying the sweat glands) releasing noradrenaline or norepinephrine are called noradrenergic or adrenergic neurons. Noradrenaline, dopamine, adrenaline, or epinephrine are collectively called "catecholamines" as they contain a catechol moiety and an amine side chain. The five stages of neurotransmitter release involve their synthesis, storage, release, reuptake and metabolism.
Synthesis: Catecholamine synthesis requires tyrosine, which...
3.8K
Predicting Reaction Outcomes02:24

Predicting Reaction Outcomes

8.4K
Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
8.4K
Receptor-mediated Endocytosis01:20

Receptor-mediated Endocytosis

6.1K
Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
6.1K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Plants That Evolved Under High Phylogenetic Diversity Have Higher Invasion Success, Particularly in Undisturbed Communities.

Ecology letters·2026
Same author

Dynamics of biotic resistance to plant invasions.

Biological reviews of the Cambridge Philosophical Society·2026
Same author

Mechanistic links between coexistence, productivity, and stability in experimental grasslands.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Multiple Mechanisms Required to Predict Grass Community Composition.

Ecology letters·2026
Same author

Intense solar radiation constrains plant species richness in global grasslands.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Global functional shifts in trees driven by alien naturalization and native extinction.

Nature plants·2026

相关实验视频

Updated: Jul 11, 2025

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents
06:25

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents

Published on: May 16, 2025

165

敌人释放的一个机制框架.

Joshua I Brian1, Jane A Catford1,2,3

  • 1Department of Geography, King's College London, London, UK.

Ecology letters
|November 3, 2023
PubMed
概括

敌人释放假说 (ERH) 通过考虑敌人的影响,多样性和特定生态环境中的宿主适应来解释外来物种的成功. 这一框架改善了管理生物入侵的预测.

关键词:
这是生物入侵.上下文依赖性上下文依赖性防御的防御防御的防御敌人释放假设 敌人释放假设进化 演化 演化 演化 演化 演化 演化 演化异国植物物种异国植物物种.草食动物 草食动物这是一个元分析.病原体是一种病原体.自引入以来的时间.

更多相关视频

A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance
07:19

A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance

Published on: March 19, 2020

5.9K
Irrelevant Stimuli and Action Control: Analyzing the Influence of Ignored Stimuli via the Distractor-Response Binding Paradigm
12:12

Irrelevant Stimuli and Action Control: Analyzing the Influence of Ignored Stimuli via the Distractor-Response Binding Paradigm

Published on: May 14, 2014

10.6K

相关实验视频

Last Updated: Jul 11, 2025

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents
06:25

A Real-Time Interactive System for Studying Confrontational Pursuit Behavior in Rodents

Published on: May 16, 2025

165
A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance
07:19

A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance

Published on: March 19, 2020

5.9K
Irrelevant Stimuli and Action Control: Analyzing the Influence of Ignored Stimuli via the Distractor-Response Binding Paradigm
12:12

Irrelevant Stimuli and Action Control: Analyzing the Influence of Ignored Stimuli via the Distractor-Response Binding Paradigm

Published on: May 14, 2014

10.6K

科学领域:

  • 生态生态学 生态生态学
  • 进化生物学 进化生物学
  • 侵袭生物学 侵袭生物学

背景情况:

  • 敌人释放假说 (ERH) 是对外来物种成功的主要解释.
  • 目前的ERH研究往往缺乏敌人释放证据和异国物种表现之间的明确联系,造成不确定性.
  • 这种差距阻碍了对敌人释放在生物入侵中的作用的全面理解.

研究的目的:

  • 证明敌人释放对外来物种表现的影响来自三个关键因素的相互作用:敌人影响,敌人多样性和宿主适应.
  • 确定7种调节这些因素的生态环境.
  • 为ERH提出一个机械因素-上下文框架,以提高预测能力和指导管理.

主要方法:

  • 这项研究综合了现有研究,并重新分析了一项元分析,以说明生态环境的重要性.
  • 开发了一个因子上下文框架来构建ERH.
  • 该框架将敌人的影响,多样性和宿主适应与上下文因素相结合,例如自引入以来的时间和资源的可用性.

主要成果:

  • 敌人释放效应取决于敌人的影响,多样性和宿主适应的相互作用.
  • 七种生态环境显著调节这些相互作用,影响异国物种的表现.
  • 在ERH研究中,不一致的发现往往源于忽视了这些关键的生态环境.

结论:

  • 一个精细的ERH框架,结合了因素和背景,为外来物种的成功提供了更可概括的预测.
  • 这种方法统一了各种与敌人有关的入侵假设.
  • 因素背景框架为未来的研究提供了明确的路线图,并为生物入侵提供了有效的管理策略.