The removal of even more significant fractions of framework cations leads to the formation of a mesoporous matrix throughout the zeolite crystal, thereby increasing the pore volume and surface area of the zeolite.
After step depolarizations to potentials near -70 mV and more negative, a significant fraction of Na current was carried by the background Na channels.
"It is more likely that a significant fraction of the acceleration could be due to this more prosaic cause.
Corporations may react to the change in the tax code by paying more dividends, and some significant fraction of those payments would go to accounts that are not tax-deferred, resulting in greater personal taxable income.
The short lived natural radionuclide, Be-7, was detected in the surface (0-2 cm) section of Chap 2 indicating that the site had received at least some very recent deposition, more specifically that a significant fraction of the particles in the upper two centimeters were deposited within about a year of core collection [ 28].
Although this is probably a reasonable first approximation, more complicated dynamics for a significant fraction of nonsynonymous mutations, such as population structure (local adaptation), balancing selection or very weak positive selection, may have obscured a difference in the inferred efficacy of selection on nonsynonymous sites in the two species.
A significant fraction of the more than 18 million scientific articles currently indexed in the PubMed database are related to immune responses to various agents, including infectious microbes, autoantigens, allergens, transplants, cancer antigens and others.
However, despite the high costs incurred by slow microbial testing and the availability of methods for faster testing [20], no rapid microbial enumeration technology has displaced a significant fraction of the more than 350 million traditional culture tests that are carried out by manufacturers of pharmaceuticals and personal care products each year [21].
Their contribution becomes more significant at longer wavelengths, since a significant fraction of them does not become fainter at wavelengths longer than 100 μm, contrary to the other stars.
Finally, the tethered factors may create chromatin that is more accessible to mismatch repair, so a significant fraction of mutations could in principle be reverted, to create a large class of mutants with only single base changes.
