(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.
Onions are triggered to bulb by the length of daylight hours. A short day onion starts forming a bulb when the daylength reaches 10-12 hours. They are primarily grown in the winter and harvested in March, April and May. Mostly grown in the southern states. Day neutral or intermediate day onions are triggered with 12-14 hours of daylight.