Nitrogen N

Sulfonamides derived from sulfanilamide (p-arninoben2enesulfonainide) are commonly referred to as sulfa dmgs. Although several dmg classes are characterized by the presence of a sulfonamide function, eg, hypoglycemics, carbonic anhydrase inhibitors, saluretics, and tubular transport inhibitors, the antibacterial sulfonamides have become classified as the sulfa dmgs. Therapeutically active derivatives are usually substituted on the N nitrogen the position is generally unsubstituted. These features are illustrated by the stmctures of sulfanilamide (1) and sulfadiazine (2)... 

FIGURE 13.46 Nondispersive Infrared analyzer based on (d) interference filters and (b) gas correlation cechnictues. M = mirror, D = detector, S source, F = filter disk. WO = motor, FB = baud pass filter. SD = synchronous detection. C = correlation cell. N nitrogen filter. 

Stick-dampf, -dunst, m. choke damp suffocating vapor, -dioiyd, n. nitrogen dioxide. 

Sticksto F-gas, n. nitrogen gas. -gehalt, m. nitrogen content, -gleichgewicht, n. nitro gen equilibrium. -halogen, n. nitrogen halide. 

Stickstoff-werk, n. nitrogen plant, -zyantitan, n. titanium cyanonitride. 

The structure and formation of ATP. (A) The chemical structure of adenosine triphosphate (ATP). "C" indicates carbon, "N" nitrogen, "O" oxygen, "H" hydrogen and "P" phosphorus. Note the negative charges on the phosphate groups (PO3 ). (B) ATP can be formed from adenosine diphosphate (ADP). 

Numbers in this column indicate oxygen percentage while the letter prefix indicates the diluent gas. For example, the entry "Cl 3" means dilution to an oxygen content of 1 3 percent with carbon dioxide as the diluent gas. The letter prefixes are C = Carbon Dioxide N = Nitrogen A = Argon and H = Helium. 

Nitrogen can be found in compounds with ov datum numbers ranging from —3 to +5. For each of the possible integral oxidation numbers, give one example of n nitrogen compound or ion. 

H = hydrogen N = nitrogen No = sodium P = phosphorus K = potassium Cr = chromium Co = cobalt Zn = zinc Mo = molybdenum... 

Figure 2. The molecular structure of 2-methyl-4-nitroaniline (MNA) as determined by x-ray crystallography (2). Key C, carbon N, nitrogen O, oxygen and H, hydrogen.

The formulas analogous to that used for carbon may be applied to calculate the intensities of the isotopic peaks due to the presence of nitrogen atoms. The general formula for the intensity of the A + m peak (as a percentage of the A peak) for a compound containing n nitrogen atoms is represented by Equation 5.13 ... 

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