active galactic nuclei (AGN)
phys. Zone in the central region of some galaxies where a mass of up to 100 million times that of the Sun is concentrated, emitting large and variable amounts of […]
active immunity
biol. The immunity which results from the production of antibodies by the immune system in response to the presence of an antigen. འགོག་ཟུངས་སྐྱེད་རྫས་ཤིག་མངོན་པའི་ཡ་ལན་དུ་ནད་འགོག་མ་ལག་གིས་འགོག་གཟུགས་སྐྱེད་སྐྲུན་བྱེད་པ་ལ་བརྟེན་ནས་བྱུང་བའི་ནད་འགོག་ལ་གོ
active site
biol. Part of an enzyme molecule in its natural hydrated state which, by its three-dimensional conformation and charge distribution, confers upon the enzyme its substrate specificity. It binds to a […]