Dictionary » S » Spectrum



A charted band of wavelengths of electromagnetic vibrations obtained by refraction and diffraction.

By extension, a measurable range of activity, such as the range of bacteria affected by an antibiotic (antibacterial spectrum) or the complete range of manifestations of a disease.

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Photosynthesis Experiment - Do LED's work?

... majority of plant species is the highest at approximately 450 nm and 675 nm wavelengths. 450 nm represents the most purple of hues in the visible spectrum, whilst 675 nm manifests itself as a reddish-orange. If you are utilizing an LED then the light intensity is dependant upon the current. Evidently, ...

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by Coelacanth
Sun Oct 13, 2013 6:33 am
Forum: Botany Discussion
Topic: Photosynthesis Experiment - Do LED's work?
Replies: 8
Views: 9219

experiences occur separately?

... a powerful but small brain, which is why it can react so quickly. Our brains are more sluggish because they are bigger. So it appears there is a spectrum. Sometimes the transit of neural information is fast, sometimes it is slow, and sometimes it doesn't happen at all. To my neurologically illiterate ...

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by wildfunguy
Mon Sep 30, 2013 7:15 pm
Forum: Human Biology
Topic: experiences occur separately?
Replies: 2
Views: 2274

Re: Is complexity inevitable?

... salt in my eyes! Twin studies reveal that genetic differences can't explain all of the human variation, meaning that each unique genome presents a spectrum of possibilities, not a predetermined outcome. This is because of the role of environment, C and E . Whether this is true of all multicellular ...

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by wildfunguy
Thu Sep 26, 2013 6:12 pm
Forum: Evolution
Topic: Is complexity inevitable?
Replies: 16
Views: 18007

Muscle Fiber Types are FICTIONAL, or is it not?

... type IIa, or even somewhere higher or lower (if you know what i mean here). Then there can be type IIc, IId... and on. Thus, because of the wide spectrum of available capacity levels there can be many more muscle fiber types. Or is it not? This is only my thinking and opinion. I would like you ...

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by GPiklaov
Thu May 16, 2013 2:31 pm
Forum: Human Biology
Topic: Muscle Fiber Types are FICTIONAL, or is it not?
Replies: 0
Views: 2775

Re: Device for ratiometric fluorescence measurement

If you don't mind losing the flexibility of scanning the spectrum or rapidly changing ex/em bands, you would build a 2-band fluorescence colorimeter. You'd need two emission filters and one or two excitation filters, arranged around your cuvette so that ...

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by jonmoulton
Mon Mar 04, 2013 4:58 pm
Forum: General Discussion
Topic: Device for ratiometric fluorescence measurement
Replies: 1
Views: 1825
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