A block wall or fence and methods for constructing a block wall or fence with a footing framework encased in concrete to form a footing support structure wherein the blocks of the wall or fence may be laid without first constructing the footing support framework or first enclosing the footing framework in concrete. wherein R1 is selected from an alkyl group, an alkenyl group, an alkynyl group and a cycloalkyl group, each of which may be optionally substituted and * denotes a chiral centre. The image data processor includes a computer-readable medium holding computer-executable instructions. for 4 hours and then at 1,000\xb0 C. Eliminating oxygen from the process prevents deflagration within the system thus allowing for the use of flammable solvents within the process. The latter is received by a tester device that can be connected to the calibration component via tester channels.