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相关概念视频

Colors and Magnetism03:02

Colors and Magnetism

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Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
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Relationship Formation

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What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...
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Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)

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Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
1.4K
Ladder Diagrams: Complexation Equilibria01:07

Ladder Diagrams: Complexation Equilibria

585
Ladder diagrams are useful for evaluating equilibria involving metal-ligand complexes. The vertical scale of the ladder diagram represents the concentration of unreacted or free ligand, pL. The horizontal lines on the scale depict the log of stepwise formation constants for metal-ligand complexes and indicate the dominant species in all the regions.
The formation constant, K1, for the formation of Cd(NH3)2+ complex from cadmium and ammonia is 3.55 × 102. Log K1 (i.e. pNH3) is 2.55, and...
585
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
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Valence Bond Theory02:42

Valence Bond Theory

11.1K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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相关实验视频

Updated: Jan 10, 2026

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations
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采矿更高阶的三元相互作用.

Marta Niedostatek1,2, Anthony Baptista1,2,3, Jun Yamamoto4

  • 1School of Mathematical Sciences, Queen Mary University of London, London, UK.

Nature communications
|November 25, 2025
PubMed
概括
此摘要是机器生成的。

本研究介绍了三元感知子模型 (TPM),用于分析复杂系统中的高阶相互作用. 它揭示了三元相互作用如何影响相互信息,并开发了一种在生物数据中识别它们的方法.

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科学领域:

  • 复杂系统生物学 复杂系统生物学
  • 网络科学 网络科学
  • 计算生物学 计算生物学

背景情况:

  • 复杂的系统表现出高阶的相互作用,超出了简单的对联连接.
  • 三元相互作用,涉及一个节点调节两个其他节点,在生物系统中至关重要,但往往被忽视.
  • 现有的模型主要侧重于对互动,忽视了更高阶的动态.

研究的目的:

  • 提出一个模型来理解三元交互如何影响系统动态.
  • 开发一种算法,从数据中提取三元交互.
  • 在生物数据集,特别是基因表达数据中识别新的三元相互作用.

主要方法:

  • 开发三元感知器模型 (TPM) 以量化三元相互作用对相互信息的影响.
  • 从节点元数据中提取三元交互的三元交互挖掘 (TRIM) 算法的制定.
  • 将TRIM算法应用于基因表达数据.

主要成果:

  • 三元感知器模型表明,三元相互作用可以调节连接节点之间的相互信息.
  • 三元交互挖掘算法成功地从复杂的数据集中提取了潜在的三元交互.
  • 在基因表达数据中发现了与急性髓性白血病相关的新候选三基相互作用.

结论:

  • 三相互作用在复杂系统的动态中起着重要的,但往往被忽视的作用.
  • 拟议的三元感知子模型和TRIM算法为研究高阶相互作用提供了一个新的框架.
  • 这种方法可以提高对复杂生物系统的理解,在生态学和气候科学中具有潜在的应用.