Temperature inhomogeneities cause the abundance discrepancy in H II regions.

H II regions are ionized nebulae surrounding massive stars. They exhibit a wealth of emission lines that form the basis for estimation of chemical composition. Heavy elements regulate the cooling of interstellar gas, and are essential to the understanding of several phenomena such as nucleosynthesis, star formation and chemical evolution.

Patients' view of the differences in topical creams for radiation dermatitis prevention. A pilot study of cosmetic properties.

Aim: To investigate the feasibility of including patients' reports on the cosmetic properties of topical formulations for acute radiation dermatitis (ARD).

Background: No topical agent tested for acute radiation dermatitis (ARD) has proven to be better than any other, all achieving similar objective outcomes. No clear guidelines have therefore been established in clinics.