The medium size HA and building blocks, weighing between 1 and 0.5 kDa (red) cover around 26%, and small (low molecular size) HA weighing less than 0.5 kDa (green) cover the rest of the HA complex (20%).
The ability of drug to cross the BBB depends on few factors like molecular size (should be less than 500 Da), charge (should have low hydrogen bonding capabilities), and lipophilicity (should have high lipophilicity) [ 186].
Size exclusion chromatography with refractive index detection (SEC-RI) indicated a minor decrease in apparent molecular size of the amylose and the less branched amylopectin fractions.
These findings suggest that the larger molecular size and increased charge of tinzaparin make it less likely to accumulate than other LMWHs in patients with mild-to-moderate renal insufficiency (CrCl >30 mL/min).
The only exception to this was complex II, which in S. renifolius mitochondria had drastically less mobility, suggesting a difference in its molecular size.
Fluorescence microscopy revealed that conjugate P-6 exhibited nuclear localization, while P-18 showed less nuclear stain but intracellular localization, suggesting that increased molecular size is one of the determinants in reducing nuclear access.
The value of D in the Fick equation depends heavily on molecular size; for example, the diffusion of albumin across the vasculature is estimated to be ∼1,000-fold ∼1,000-foldhat of water [ 11, 12].
He concluded that apolar molecules entered the cells with less difficulty than polar substances, and he showed that this was irrespective of their molecular size.
Any difference in banding patterns (disregarding bands less than 50 kB in size, i.e. below the lowest band of the molecular size marker used) between 2 genomic restriction profiles, was considered to be sufficient to regard the profiles as non-identical.
Essential oil and phytomolecule, despite having excellent bioactivity in vitro, demonstrate less or no in vivo actions due to their volatility, irritation, poor lipid solubility, or improper molecular size, resulting poor absorption, and bioavailability.
