Its strongest peak at 1282 cm is routinely used to estimate the nitrogen concentration in the A form.

The latter is routinely used to estimate the nitrogen concentration in the B form.

Nitrocellulose is soluble in a mixture of alcohol and ether until nitrogen concentration exceeds 12 percent.

Higher nitrogen concentrations in wild lupine leaves resulted in significantly shorter larval durations in a feeding trial.

The nitrogen concentration then rapidly increases during the brief second phase and finally reaches a plateau, the third phase.

An atmosphere in which oxygen, carbon dioxide and nitrogen concentrations as well as temperature and humidity are regulated.

The nitrogen concentration in the blood and the alveolar air is about the same.

The instrument must first be calibrated by analyzing a material that is pure and has a known nitrogen concentration.

Conversely, total nitrogen concentrations are higher in these plants compared to those growing in open sites with no litterfall.

Because of the high nitrogen concentration in urea, it is very important to achieve an even spread.