(1942) used FITC-labeled antibodies to identify Pneumococcal antigens in infected tissue. Since then, improvements have been made in protein conjugation, tissue fixation methods, detection labels and microscopy, making immunohistochemistry a routine and essential tool in diagnostic and research laboratories.
Check daily for germination. Onion seeds germinate in five to 14 days, depending on the cultivar and the soil temperature. Move to a sunny location and keep the tops trimmed to a height of 4 inches. Keep soil moist.
How to Grow Onions-Sowing Maincrop Onion Seeds. Sow maincrop onion seeds as soon as your soil allows you to-late February to early April for an August or September crop. Sow the onion seeds very thinly into drills 13mm(1/2) deep, in rows 23cm(9) apart. Carefully cover the onion seed with soil and gently water in. Germination will take approximately 21 days. Thin out your onion seedlings when they have pushed through the soil and are standing vertical to about 25mm(1)-50mm(2) apart and then again later to 10cm(4) apart. Lift the thinnings carefully... make sure the soil is moist.