By definition, basalt is an aphanitic igneous rock with less than 20% quartz and less than 10% feldspathoid by volume, and where at least 65% of the feldspar is in the form of plagioclase. Basalt features a glassy matrix interspersed with minerals.The average density is 3.0 gm/cm 3.y definition, basalt is an aphanitic igneous rock with less than 20% quartz and less than 10% feldspathoid by volume, and where at least 65% of the feldspar is in the form of plagioclase. Basalt features a glassy matrix interspersed with minerals.
An antigen is defined as a substance that reacts with antibody molecules and antigen receptors on lymphocytes. 2. An immunogen is an antigen that is recognized by the body as non-self and stimulates an adaptive immune response. 3. Chemically, antigens are large molecular weight proteins and polysaccharides. 4.
When a tumor cell is killed, additional antigens are released, stimulating activation of new populations of T cells and B cells that recognize tumor antigens 3,4,6,7; This can result in an expanding cascade of immune cells able to recognize cancer cells bearing a variety of tumor antigens as the tumor mutates over time 5-8