Suppr超能文献

化学振荡仅由动力学非线性产生,因此可在接近平衡的状态下发生。

Chemical oscillations arise solely from kinetic nonlinearity and hence can occur near equilibrium.

作者信息

Walz D, Caplan S R

机构信息

Biozentrum, University of Basel, Switzerland.

出版信息

Biophys J. 1995 Nov;69(5):1698-707. doi: 10.1016/S0006-3495(95)80039-1.

Abstract

A minimal kinetic scheme for a system displaying sustained chemical oscillations is presented. The system is isothermal, and all steps in the scheme are kinetically reversible. The oscillations are analyzed and the crucial points elucidated. Both positive and negative feedback, if properly introduced, support oscillations, provided the state responsible for feedback is optimally buffered. It is shown that the requisite nonlinearity is introduced at the kinetic level because of feedback regulation and not, as is usually assumed, by large affinities that introduce nonlinearity at the thermodynamic level. Hence, sustained oscillations may occur near equilibrium.

摘要

提出了一个用于展示持续化学振荡系统的最小动力学方案。该系统是等温的,并且方案中的所有步骤在动力学上都是可逆的。对振荡进行了分析并阐明了关键点。如果适当地引入,正反馈和负反馈都能支持振荡,前提是负责反馈的状态得到最佳缓冲。结果表明,所需的非线性是在动力学层面由于反馈调节而引入的,而不是像通常所假设的那样,由在热力学层面引入非线性的大亲和力所导致。因此,持续振荡可能在接近平衡的状态下发生。

相似文献

3
Dynamic strength of molecularly bonded surfaces.分子键合表面的动态强度
J Chem Phys. 2006 Nov 21;125(19):194702. doi: 10.1063/1.2372493.
7
Allosteric regulation, cooperativity, and biochemical oscillations.变构调节、协同性和生化振荡
Biophys Chem. 1990 Aug 31;37(1-3):341-53. doi: 10.1016/0301-4622(90)88033-o.
9
Turbulence near cyclic fold bifurcations in birhythmic media.
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Aug;70(2 Pt 2):026212. doi: 10.1103/PhysRevE.70.026212. Epub 2004 Aug 26.
10
An organic-based pH oscillator.一种基于有机物的pH振荡器。
J Phys Chem A. 2007 Feb 1;111(4):549-51. doi: 10.1021/jp068534v.

文献检索

告别复杂PubMed语法,用中文像聊天一样搜索,搜遍4000万医学文献。AI智能推荐,让科研检索更轻松。

立即免费搜索

文件翻译

保留排版,准确专业,支持PDF/Word/PPT等文件格式,支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述,25分钟生成高质量综述,智能提取关键信息,辅助科研写作。

立即免费体验