Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary.
Together with oils, fats comprise one of the three principal classes of foodstuffs, the others being proteins and carbohydrates.
In addition to PAHs that are formed in virtually every combustion source, we now believe that the principal classes of pollutants from the combustion/thermal degradation of hazardous wastes are a) fine and ultrafine PM, b) CHCs/BHCs, and c) persistent radicals.
The three principal classes of lipids that form the bilayer matrix of biological membranes are glycerophospholipids, sphingolipids, and sterols (principally cholesterol).
This switch is intimately linked to the architecture of the two principal classes of neural stem and progenitor cells, the apical (neuroepithelial, radial glial) and basal (intermediate) progenitors, which in turn is crucial for their symmetric versus asymmetric divisions.
Three principal classes of 2ODDs control the later stages of the pathway where bioactive GA is produced and inactivated.
The principal classes of solids insulators, semiconductors, metals, and superconductors are distinguished on the basis of electric conductivity and its variation with temperature.
In this chapter, we briefly review the principal classes of natural and synthetic biomaterials commonly used within the TE/RM industry.
Air compressors and pneumatic tools constitute the principal classes of pneumatic devices.
Here, we examine the principal classes of non-integrating vectors, ranging from episomes to engineered mini-chromosomes to true human artificial chromosomes.
