Frederick Banting in the blood which was then excreted in urine. Attempts to extract insulin from ground-up pancreas cells were unsuccessful, likely because of the destruction of the insulin by the proteolysis enzyme of the pancreas. The challenge was to find a way to extract insulin from the pancreas prior to its being destroyed. Moses Barron published an article in 1920 which described experimental closure of the pancreatic duct by ligature; this further influenced Banting's thinking. The procedure caused deterioration of the cells of the pancreas that secrete trypsin which breaks down insulin, but it left the islets of Langerhans intact. Banting
Highest and best use to the developer and this makes it the maximally productive use. In reality, short term constraints on availability of capital and labour, inevitable conflicts between the other key factors, as well as the predisposition and experience of the developers, often lead to developments that are not maximally productive, but are a compromise. They are productive enough and safe enough that the developer proceeds, but they are not maximally productive. James Graaskamp fully developed a model that reflects this reality more clearly, and termed it most probable use. The Test of Highest and Best Use is applied to an improved property