Table 2.

Summary of results for the crystallization of glycine from 20 ml initial solution using MA-MAEC technique and control experiments.

	Microwave Heating Crystal morphology Time (3.2 M Glycine)			Room Temperature Crystal morphology Time (3.2 M Glycine )
pH	HMA	MUDA	UDET	HMA	MUDA	UDET
4	N/A # 30 ± 6 sec	- 26 ± 3 sec	- 132 ±17 sec	α 15 ± 1 min	α: γ 21±2 min	α: γ 38 ± 5 min
6	α 45 ± 1 sec	α 35±3 sec	- 130 ±17 sec	α: γ 26 ± 1 min	α 17 ± 2 min	α:γ:β 34 ± 0 min
9	α: γ 68 ± 8 sec	- 30 ± 0 sec	- 60 ± 0 sec	α: γ 37 ± 0 min	α: γ 20 ± 0 min	- 62 ± 0 min

Note: Reported times refer to the complete evaporation of solvent. In most cases, glycine crystal appears before the complete evaporation of the solvent. Morphology of “as prepared” glycine crystals was determined from optical images using a minimum of 100 crystal count. Significant differences in the shapes of glycine polymorphs allows for visual determination to be carried out.