ESTIMATION OF PROTOPLASMIC PERMEABILITY FROM PLASMOLYTIC TESTS

The Role of Water in Protoplasmic Permeability and in Antagonism

The behavior of the cell depends to a large extent on the permeability of the outer non-aqueous surface layer of the protoplasm. This layer is immiscible with water but may be quite permeable to it. It seems possible that a reversible increase or decrease in permeability may be due to a corresponding increase or decrease in the water content of the non-aqueous surface layer. Irreversible increa...

the washback effect of discretepoint vs. integrative tests on the retention of content in knowledge tests

در این پایان نامه تاثیر دو نوع تست جزیی نگر و کلی نگر بر به یادسپاری محتوا ارزیابی شده که نتایج نشان دهندهکارایی تستهای کلی نگر بیشتر از سایر آزمونها است

Effects of Octylguanidine on Cell Permeability and Other Protoplasmic Properties of Allium cepa Epidermal Cells.

Effects of octylguanidine (OG) were studied on the permeability of cells of the adaxial epidermis of Allium cepa bulb scales to water and methyl urea and on the protoplast surface. Interference of OG with the Ca(2+) and Al(3+) action on the cell surface was also investigated.Permeability of the cell membrane for water and methyl urea increased nearly three times in presence of OG. The effect of...

Relative permeability estimation

ARMA modeling for estimation of permeability from perfusion MRI

We develop noninvasive MRI techniques that quantify the permeability of the Blood-Brain Barrier (BBB). Using such gadolinium compounds as Gd-DTPA and gadomer17, changes in R1 (R1 = 1/T1) can be measured and used as estimates of tissue concentration versus time, thus permitting estimates of BBB permeability parameters. Estimating BBB permeability parameters requires deconvolution in a linear sys...