During this time of covid 19, many of the world's economies fell drastically, so one method that can improve the economy of the city of Medan is to make improvements to micro, small and medium enterprises. So, in this paper, a study aims to identify and analyze the development of micro, small and medium enterprises (MSMEs) in supporting economic growth in the city of Medan. One of the business fields that can develop and be consistent in the national economy is Micro, Small, and Medium Enterprises (MSMEs). Micro, small and medium enterprises (MSMEs) are a good forum for job creation planned by the government, private sector, and individual business actors.

This study aims to determine the existence of reaction wood in teak wood branches (Tectona Grandis Linn. F) by the colouring method of Chlor Zinc Iodine in the transversal section. The main branch with 4 cm in diameter was cut to the ten parts in sequence, then dropped by the Chlor Zinc Iodine solution in the transverse section and observed under the microscope NIKON SMZ645. The natural wood surface is a light brown that was evenly distributed. But after dropping with chlor zinc iodine, there are changes of colour on the wood surface shown by the presence of spots with blue and dark blue, which indicates the reaction wood in some pieces a branch with a pattern of spots and changes in position. It can be concluded that there is significant existence of reaction wood in branches of teak wood.