(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.
Feb 3 to Apr 20, That is not even 3 months. Onions, need more time, maybe 5 months or more. Also, if you read the previous comments, you will know that when the top almost dies, then its the time to harvest. As long as the top is healthy green, the onion is still working on the bulb.