(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.
Carrots usually take longer than a week to come up for me, sometimes as long as 3 weeks. They take longer to germinate than most other veggies I grow. Give them some more time and they may be fine. I've read they will not germinate if the soil is over 95F. Soil at 40 C would be too hot. (Kinda ridiculous we still use Fahrenheit temps here in the US, in my opinion.) Your could try shading the soil to help keep it cool enough for good germination.