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Dictionary » P » Perturbation

Perturbation

perturbation

1. The act of perturbing, or the state of being perturbed; especially, agitation of mind.

2. (Science: astronomy) A disturbance in the regular elliptic or other motion of a heavenly body, produced by some force additional to that which causes its regular motion; as, the perturbations of the planets are caused by their attraction on each other.

Origin: L. Perturbatio: cf. F. Perturbation.


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bacteria and stress

... because of accumulation of byproducts during growth? I am not particular about the type of stress, but I would like to know if outer membrane perturbation occurs owing to the above mentioned "stress".

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by Helix
Fri Sep 07, 2007 1:59 pm
 
Forum: Microbiology
Topic: bacterial stress
Replies: 5
Views: 919

The Fiber Disease

... soil...... but deffraction by a very very long high power low tone acoustic field pulsed may offset ion beam at short intervals but ... consistant perturbation are needed to repair DNA damage... remember that there is a listener..... although the response may be rather encrypted. http://helios.izmiran.troitsk.ru/cosray/minutes.htm ...

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by Nadas Moksha
Sat Dec 02, 2006 3:58 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 748642

The Fiber Disease

... IEEE Trans. Antennas Propagat., Vol. AP-26, No. 2, 198–204,Mar. 1978. [3] Yu, C.-C., “Sidelobe reduction of asymmetric linear array by spacing perturbation,” IEE Electronics Letters, Vol. 33, No. 9, 730–732, April 1997. [4] Bae, J.-H., K.-T. Kim, J.-H. Lee, H.-T. Kim, and J.-I. Choi, “Design ...

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by Nadas Moksha
Fri Sep 08, 2006 6:45 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 748642

The Fiber Disease

... of existing actin filament architecture in PtK2 cells. PMID: 2277094 1992 - Distribution of F-actin during mouse facial morphogenesis and its perturbation with cytochalasin D using whole embryo culture. PMID: 1517392 1994 - Differences in the G/total actin ratio and microfilament stability ...

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by Skytroll
Mon Jul 10, 2006 5:53 am
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 748642

Can YOU or anyone help me?

... from extensive volcanism could be similar to the effects from a large impact (6), but the time scale of the two processes would be different. The perturbation on climate and ecosystems from an impact would be geologically instantaneous, but the effects from volcanism would be spread over at least ...

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by CoolJay221
Thu Feb 09, 2006 6:55 pm
 
Forum: General Discussion
Topic: Can YOU or anyone help me?
Replies: 4
Views: 999


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