A new convenient and general one-step route for preparing azines by treating aromtic aldehydes and semicarbazide with anhydrous zinc chloride as catalyst is described.
14) translocation were noted in patients with short stature, and all of these cases were found to have a specific genetic syndrome – maternal uniparental disomy (UPD) of chromosome 14.
They've been called the mother culture-the 'cultura madre'-of Central America, and it was this Olmec mother culture that produced this unsettling face.