Sentences with phrase «bromine atoms»
"Bromine atoms" refers to individual units of the element bromine. Bromine is a chemical element that exists in nature as individual atoms.
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The structure is stable at room temperature and was achieved by exchanging chlorine with bromine atoms.
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Using the tip of an atomic force microscope, they placed single bromine atoms on a sodium chloride surface to construct the shape of the Swiss cross.
20 bromine atoms positioned on a sodium chloride surface using the tip of an atomic force microscope at room temperature, creating a Swiss cross with the size of 5.6 nm.
Here the antiproton and a proton or neutron from an ordinary nucleus, presumably that of a silver or bromine atom in the photographic emulsion, would die simultaneously.
Bromine atoms released from bromine - containing compounds that reach the stratosphere also destroy ozone by a similar mechanism.
The researchers instead attached a single bromine atom to fatty acids, a process that required no complicated reaction steps, and treated cells with these modified fatty acids.
They treated cells with fatty acids containing a single bromine atom and used scanning X-ray fluorescence microscopy to observe the molecules inside the cells.
The tiny cross is made of 20 bromine atoms and was created by exchanging chlorine with bromine atoms.
Each unit of cellulose has three hydroxyl groups, which are chemically modified with a bromine atom.
«We take a molecule of the natural gas constituent methane (CH4) and replace one of its hydrogen atoms with a bromine atom to form methyl bromide (CH3Br),» explains Pérez - Ramírez.
However, once the gas drifts into the upper atmosphere, sunlight breaks off bromine atoms, which eat up about 10 % as much ozone as does the chlorine from banned chlorofluorocarbon compounds.
They diffused into the growing crystals an analog of aspirin that contains a bromine atom to aid in the X-ray crystallography.
So there was alarm in the 1970s when researchers first warned that extremely stable man - made compounds such as CFCs, used in refrigerants and aerosols, were floating up into the stratosphere, where they released chlorine and bromine atoms that break down ozone molecules.