Quantitative immunologic studies with allergens; deterioration of ragweed pollen extracts as measured by precipitation, neutralization, and protein nitrogen analysis; the prevention of deterioration by glycerin.
D000485:Allergens; D031164:Ambrosia; D052179:Antigens, Plant; D005990:Glycerol; D006967:Hypersensitivity / Q000032:analysis*; D009584:Nitrogen; D010936:Plant Extracts
D000485:Allergens; D052179:Antigens, Plant; D010936:Plant Extracts; C433085:ragweed pollen; D009584:Nitrogen; D005990:Glycerol
ALLERGY/determination