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PET --> positron emission tomography

(Science: radiology) A highly specialised research imaging technique using short lived radioactive substances - usually those made with a cyclotron. This technique is very sensitive in picking up active tumour tissue but does not measure the size of it.

Tomographic images are formed by computer analysis of photons detected from annihilation of positrons emitted by radionuclides incorporated into biochemical substances; the images, often quantitated with a colour scale, show the uptake and distribution of the substances in the tissue, permitting analysis and localization of metabolic and physiological function.

Because the half-lives of the radionuclides are so short (20 minutes to 2 hours), and the equipment expensive, pET is rarely used in a clinical setting. But since its development in the mid-1970s, it has proved the most important tool yet devised for experimental investigation of the living brain, whether healthy, traumatised, or diseased. With CT and mRI, it represents a new generation of computer imaging techniques that have revolutionised medicine and physiology.

Acronym: PET

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Re: Gene cloning question

I want to clone a human gene in pET-21a, and transfer to E.coli. I clone the gene in Nde 1 site that it’s sequence is CA/TATG, My question, is The ATG of Nde1 act as a start codon in result I must delete The ATG of my sequence or I can use ...

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by mohajeri
Thu Feb 06, 2014 10:01 pm
Forum: Molecular Biology
Topic: Gene cloning question
Replies: 20
Views: 17650


... suppression of critical thought that created emotion based arguments like yours. It's actually people like you who suppress speech. One of your pet tactics is to describe as a liberal anyone with a sensible, scientifically correct view of these matters. Or you'll claim there's a vast conspiracy ...

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by Seth90210
Sun Jan 26, 2014 1:46 am
Forum: Human Biology
Topic: Brain size=IQ level theory (Blacks vs Whites & Asians)
Replies: 72
Views: 263503

Re: Solving World Hunger with Aphid Farms

... a BBC video: http://www.youtube.com/watch?v=43id_NRajDo The only previous attempts at farming aphids I could find online were to feed people’s pet frogs, the concepts they used could be easily scaled up, and all were simply using pea aphids and pea plants, which is far from the best possible ...

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by erialsneider
Sun Nov 03, 2013 12:13 pm
Forum: General Discussion
Topic: Solving World Hunger with Aphid Farms
Replies: 2
Views: 2836

Re: Dioxin and Heated Bottled Water

PET (polyethylene terephthalate) in itself contains no dioxins. Dioxins are products of combustion in plastics, with their formation occuring over 750 degrees F. The myth that water bottles release dioxins in response to ambient ...

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by Coelacanth
Sun Oct 13, 2013 6:39 am
Forum: General Discussion
Topic: Dioxin and Heated Bottled Water
Replies: 1
Views: 1375

Mystery Bone! Help?

... this was found where the woods meet a farmer's field. So it could potentially be from ANY animal...a wild animal (deer, coyote, raccoon), house pet (dog, cat), farm animal (cow, pig, goat, etc.). I have no idea. Note: I was a little too excited cleaning the mud out of the central hole, and accidentally ...

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by mookielou37
Mon Jul 08, 2013 2:39 pm
Forum: Zoology Discussion
Topic: Mystery Bone! Help?
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Views: 2387
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