An amino acid consists of a carbon atom with four groups of atoms attached to it.
The technique is so sensitive that it can detect a single radioactive carbon atom hiding among a quadrillion (one million billion) ordinary ones.
Methylation, the addition to a base of a group of three hydrogens and a carbon atom, is one way in which genes are regulated.
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This is the process by which DNA is chemically altered by the addition of a methyl group (a carbon atom and three hydrogens) to genetic letter C.
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In particular, when methyl groups (made up of a carbon atom and three hydrogen atoms) are plastered on to a gene, they can stop that gene from being expressed altogether.
The researchers caught an intermediate step in the process by which hydrogen is removed from tryptamine, namely the point at which a proton disappears from a carbon atom as the carbon-hydrogen bond breaks.
By tuning the laser very precisely to the frequency of one particular sort of bond (such as that with a heavy carbon atom at one end), a molecule containing that bond can be shaken up.
The carbon combines with the hydrogen in water to make carbon monoxide and hydrogen gas--the old "town gas"--but then the catalyst prompts a rejiggering of the atoms into methane (one carbon atom attached to four hydrogen atoms).
The process will not be truly carbon-neutral (for that, the CO2 would have to come out of the atmosphere, and if the algae could use only the limited amount of the gas in natural air, they would not grow fast enough) but each carbon atom will have been made to do double duty in a fuel before it finally escapes.
This was the discovery of graphene, a form of carbon one atom thick.
The IBM team's innovation to create the first single molecule picture, of a molecule called pentacene, was to use the tip to pick up a single, small molecule made up of a carbon and an oxygen atom.
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That means each of its molecules contains an oxygen atom as well as the carbon and hydrogen found in an alkane.
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Light ones are more easily deflected than heavy ones, so the two forms of carbon get separated, and when each atom reaches a detector at its expected arrival spot, it can be counted.
They were structurally similar to cytisine in many ways, sharing the location of a nitrogen atom in a particular place on a pair of bicycle-like carbon rings.
Any simple alcohol is composed of a number of carbon and hydrogen atoms (like a hydrocarbon such as petrol) together with a single oxygen atom.
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