micrography of potato starch grains, showing their reaction to iodine. iodine solution forms a dark purple-black complex in the presence of starch, and this is commonly used as a test for starch in biology - iodine stain stock videos & royalty-free footage00:14Micrography of potato starch grains, showing their reaction to iodine. Iodine solution forms a dark purple-black complex in the presence of starch, and this is commonly used as a test for starch in biology
micrography of isolated potato starch grains viewed in polarised light, clearly showing growth rings and the characteric 'maltese cross' with its origin at the grain's hilum - iodine stain stock videos & royalty-free footage00:10Micrography of isolated potato starch grains viewed in polarised light, clearly showing growth rings and the characteric 'maltese cross' with its origin at the grain's hilum
micrography of isolated potato starch grains viewed in polarised light, clearly showing growth rings and the characteric 'maltese cross' with its origin at the grain's hilum - iodine stain stock videos & royalty-free footage00:12Micrography of isolated potato starch grains viewed in polarised light, clearly showing growth rings and the characteric 'maltese cross' with its origin at the grain's hilum