oxalic/asthenia

Quinoxaline-2, 3-dione obtained from cyclocondensation reaction of o-phenylene diamine with oxalic acid was reacted with three different ketones and formaldehyde to give the corresponding Mannich bases in satisfactory yield. Their structures were confirmed by using (1)H NMR, IR, and mass analysis.

Ascorbic acid is a vitamin soluble in water and its deficiency in human body causes scurvy. Its symptoms in adults are gingivitis, susceptibility of blood vessels to damage and bleeding, changes in bones and cartilage and retarded wound healing. Ascorbic acid is necessary in redox processes taking

A sheep farmer provided a maize-based brewer's grain (mieliemaroek) and bales of Eragrostis curvula hay to ewes and their lambs, kept on zero-grazing in pens. The 'mieliemaroek' was visibly mouldy. After 14 days in the feedlot, clinical signs, including generalised weakness, ataxia of the hind