antigen encompasses all substances that can be recognized by the adaptive immune system , which includes both the antibody-based humoral immune system and a system that does not utilize antibodies, the cell-mediated immune system . the basis of the adaptive immune system lies in the capacity of immune cells...
they make high-tech affordable to everyone. the interplay of chemistry, engineering and information technology offers considerable untapped potential for sustainable development. plastics can be produced from fossil fuels, but also from renewable raw materials and even from the greenhouse gas carbon dioxide...