(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.
When and How to Start Your Onion Seeds. Onions are the earliest vegetable seeds that I start for my garden. For long-day varieties, you need to plant them 8-10 weeks before your last spring frost. As my average spring frost date is around May 10th, I try to plant my onion seeds by March 1st.