We present detailed thermal and gas-phase chemical models for the envelope of the massive starforming region AFGL 2591. By considering both timeand space-dependent chemistry, these models are used to study both the physical structure proposed by van der Tak et al. (1999; 2000), as well as the chemical evolution of this region. The model predictions are compared with observed abundances and colu...

pearl millet has tolerance to harsh growing conditions such as drought. it is at least equivalent to maize and generally superior to sorghum in protein content and metabolizable energy levels. thus it is of importance for poultry feeding. amino acid (aa) determination is expensive and time consuming. therefore nutritionists have prompted a search for alternatives to estimate aa levels. traditio...