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相关概念视频

Epistasis01:39

Epistasis

In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
Ethers from Alkenes: Alcohol Addition and Alkoxymercuration-Demercuration02:35

Ethers from Alkenes: Alcohol Addition and Alkoxymercuration-Demercuration

Overview
Ethers can also be prepared from alkenes through acid-catalyzed addition of alcohols and alkoxymercuration–demercuration.
Preparation of Ethers by Acid-Catalyzed Addition of Alcohol to Alkenes
The acid-catalyzed addition of alcohol to an alkene involves treating the alkene with an excess of alcohol in the presence of an acid catalyst to form an ether under suitable conditions. The hydrogen will add to the less substituted carbon so that the nucleophile can attack the more substituted...
Oxymercuration-Reduction of Alkenes02:36

Oxymercuration-Reduction of Alkenes

Oxymercuration–reduction of alkenes is one of the major reactions converting alkenes to alcohols. It involves the hydration of alkenes with mercuric acetate in a mixture of tetrahydrofuran and water, forming an organomercury adduct. This is followed by a demercuration step in which the adduct is reduced to an alcohol using sodium borohydride.
Protein Modifications in the RER01:26

Protein Modifications in the RER

Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal sequences.
Types of Chemical Reactions: Exchange and Reversible01:08

Types of Chemical Reactions: Exchange and Reversible

An exchange reaction is a chemical reaction in which both synthesis and decomposition occur, chemical bonds are both formed and broken, and chemical energy is absorbed, stored, and released.
A special kind of exchange reaction is the oxidation-reduction reaction, or the redox reaction. These reactions involve the transfer of electrons from one compound to another. The electrons in these reactions commonly come from hydrogen atoms, which consist of an electron and a proton. A molecule gives up a...
Changes in Skin Color: Clinical Perspectives01:14

Changes in Skin Color: Clinical Perspectives

The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
Albinism
Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. The defect is primarily...

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Updated: Jun 30, 2026

Chemical Isolation, Quantification, and Separation of Skin Lipids from Reptiles
07:55

Chemical Isolation, Quantification, and Separation of Skin Lipids from Reptiles

Published on: February 7, 2019

在经济交换期间,带状皮质中的特异性反应.

Damon Tomlin1, M Amin Kayali, Brooks King-Casas

  • 1Human Neuroimaging Laboratory, Department of Neuroscience, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, USA.

Science (New York, N.Y.)
|May 20, 2006
PubMed
概括
此摘要是机器生成的。

研究人员通过测量经济游戏期间的大脑活动来研究社会交流. 他们发现,在合作过程中,在带状皮层中,与"我"相比"不是我"相关的明显的大脑反应.

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Chemical Isolation, Quantification, and Separation of Skin Lipids from Reptiles

Published on: February 7, 2019

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科学领域:

  • 神经科学是一个神经科学.
  • 社会心理学 社会心理学
  • 行为经济学是一种行为经济学.

背景情况:

  • 社会交换依赖于为共同成果赋予信誉,以指导合作,防止剥削.
  • 了解信用分配的神经基础对于理解社会决策至关重要.

研究的目的:

  • 研究社会经济交换中的信用分配背后的神经机制.
  • 确定大脑在合作期间如何区分自我和合作伙伴的贡献.

主要方法:

  • 进行了一次重复的两人经济交流任务.
  • 利用同时进行的血液动力学测量 (例如fMRI) 来记录两个参与者的大脑活动.
  • 分析了与共享结果和社会伙伴的存在有关的大脑反应.

主要成果:

  • 在带状皮层中识别了特异性神经反应,区分自我 ("我") 和伴侣 ("不是我") 的贡献.
  • 沿着带状皮层观察到这些反应的系统空间模式.
  • 证明这种模式独立于交易所的计量方面,并且没有合作伙伴就不存在.

结论:

  • 带状皮质在社会经济交流期间在区分自己与他人方面发挥着关键作用.
  • 神经信用分配机制对于调节社会互动中的合作至关重要.
  • 对于这些社会特异的神经计算来说,一个响应的合作伙伴的存在是必不可少的.