| As mentioned in the introductory section, the nitrogen heterocycle pyrrole occurs in bone oil, in which it is formed by the decomposition of proteins upon strong heating. |
| Very few porphyrins are known to form J-aggregates, the main requisite being the zwitterionic character with the protonation of the pyrrole nitrogen in the macrocycle. |
| A cosmetic composition comprising fine particles having a diameter of 0.01 to 200µm coated with a pyrrole homopolymer and an oil component. |
| The free-base form of such porphyrins contains two pyrrole nitrogens. |
| This would make this particular pyrrole group unequivalent with the others. |
| The anhydrous poly was subsequently immersed in the mixed solution of and pyrrole monomer. |
