Sentences with phrase «nitrogen atoms at»

Not exact matches

Scientists can determine where an individual piece of meat comes from using a technique called isotope analysis, looking at the specific fingerprints of carbon, hydrogen, and nitrogen atoms to see where a cow lived.

Like hydrogen, oxygen, and iodine, nitrogen normally exists as two - atom molecules in the form of a gas at room temperature.

Graphene doped with nitrogen and augmented with cobalt atoms has proven to be an effective, durable catalyst for the production of hydrogen from water, according to scientists at Rice University.

But at high pressures and temperatures above 3,140 degrees Fahrenheit, nitrogen atoms transform into a polymer, a chain of single - bonded atoms.

Baking that at 750 degrees Celsius (1,382 degrees Fahrenheit) in the presence of nitrogen and hydrogen gas reduced the graphene and locked nitrogen atoms to the surface, providing sites where ruthenium atoms could bind.

The six nitrogen atoms are at the corners of an octahedron around the Fe atom.

Here there are two options: either you insert a single nitrogen atom into the extremely fine tip, or you add nitrogen at the final phase of the diamond production process.

They are particularly good at identifying the position of light atoms such as hydrogen, oxygen, carbon and nitrogen in samples.

Disrupted oscillations The researchers focused on nitrogen — vacancy (NV) centers, imperfections in diamond that arise where an atom of nitrogen and an empty space replace carbon atoms at two neighboring spots in the crystal lattice.

On the other hand, at high (and very low) BPEI content, the nitrogen atoms are located primarily at the edge sites of the aromatic domains.

The barbell is bound to the metal atom on its head, most often at the nitrogen end of the molecule.

Similarly, in the oxazole series, compound 153 was only moderately active (IC50 = 2.83 μM), whereas substitution at carbon adjacent to the nitrogen atom resulted in a potent compound 154 (IC50 = 7.2 nM).

Scientists at Pacific Northwest National Laboratory and Heriot - Watt University in Scotland put the tetrahedral ammonium radical, made from a nitrogen atom and four hydrogen atoms, on the electronegativity scale.

Taken together, these results suggest that there is a considerable structural nitrogen atom redundancy in plerixafor, not all amino groups are necessary for activity, and the consistence of the overall charge at physiological pH does not directly affect potency.

Nitrogen, in the form of nitric oxide (one nitrogen atom and one oxygen atom), has been detected for the first time on the surface of Mars by a team of researchers using the Sample Analysis at Mars (SAM) instrument suite aboard NASA's Curiosity rover, adding to the growing speculation that life could have once flourished on ancient Mars.

Adam Foster of Aalto University in Finland and colleagues have now used the CO-functionalized tip of an atomic force microscope (AFM) to discriminate between boron (B), carbon (C) and nitrogen (N) atoms embedded at the centre of a GNR thanks to the differences in their van der Waals radii.