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Aberrations

Aberration, spherical

(Science: optics) a lens defect whereby image forming rays of one colour, passing through the outer zones of a lens come to focus at a different distance from the lens than do those of more central rays.

With a simple spherical (or plano-spherical) lens the outer rays always meet the axis closer to the lens than do more central rays and the lens is uncorrected or undercorrected. When the reverse is true the lens has been overcorrected.


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Re: How to be "good at the bench"

... IS DATA!! Record everything. e. At the end of accumulation of all data, write a one-sentence summation of the results of the experiment. Include aberrations, and any comments as to why the experiment may or may not have worked f. Common things that are missed: refer book g. Solicit feedback on ...

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by jangajarn
Sat May 23, 2009 7:15 pm
 
Forum: General Discussion
Topic: How to be "good at the bench"
Replies: 3
Views: 1441

The Fiber Disease

... copy of a page out of the pdr book on renova 0.05%. EDGMA was used in this product it is a copolymer used in renova and was positive for chromosal aberrations in mammalian cells. it is ethylene glycol dimethacrylate. used in microgels and cause swelling. look into website http://www3.interscience.wiley.com/cgi-bin/abstract/13941/ABSTRACT ...

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by msc
Fri Dec 01, 2006 4:48 am
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 748885

Stupid question about Mutualism

... category of "mutualism", but mutualism seems to be more of a broad term which applies to populations of species rather than individual aberrations. Can someone help me out? I'm writing an article which touches on this subject, and I'd like to have some good scientific facts & statistics ...

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by justpassinthru
Fri Oct 06, 2006 9:24 pm
 
Forum: Ecology
Topic: Stupid question about Mutualism
Replies: 10
Views: 3014

The Fiber Disease

... to microwaves from a cellular phone base station increases the effect of a chemical mutagen on human blood cells, leading to increased chromosomal aberrations." -nadas

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by Nadas Moksha
Sat Sep 09, 2006 8:31 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 748885

Genetic Mutation

... sets and changes in parts of chromosome sets...Polyploids arise naturally as spontaneous chromosomal mutations and as such they must be considered aberrations because they differ from previous norm..." -An introducton to genetic analysis Griffiths ..7th e page556 Even here it's written "The next ...

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by zami'87.
Tue May 17, 2005 3:07 pm
 
Forum: Molecular Biology
Topic: Genetic Mutation
Replies: 6
Views: 1606


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