Permeability specific

It has been known for some years that gramicidin forms transmembrane ion channels in lipid bilayers and biological membranes and that these channels are assembled from two molecules of the polypeptide 213). The channels are permeable specifically to small monovalent cations [such as H+, Na+, K+, Rb+, Cs+, Tl+, NH4+, CHjNHj, but not (CH3)2NH2+J and small neutral molecules (such as water, but not urea). They do not allow passage of anions or multivalent cations 21 n. 

By analyzing the atomic contributions to different target properties like BBB permeability, specific atom-types affecting these properties can be identified. 

Cake filtration characteristics such as porosity, permeability, specific resistance, and cake compactibility parameters n, p, 8, or in Equation (22.29)... 

Rare earth oxides are used for manufacturing ceramic capacitors. Their presence extends the capacitor s lifetime and improves some properties such as the compensation temperature coefficient, dielectricity and magnetic permeability. Specifically, Ce, La, Pr and Nd help keep the dielectric constant of a capacitor virtually unchanged [9]. 

From this discussion on the hormones mode of action, it appears that a characteristic property of the hormones is their specificity for the target organ. What is the combination of such specificity Is it selective permeability, specific binding, or a unique molecular... 

Electrical resistivity(a) Magnetic permeability Specific heat capacity(a) Thermal conductivity(a) Thermal coefficient of linear expansion(b)... 

Electrical resistivity(a) Magnetic permeability Specific heat(a)... 

The key idea behind this approach is to create nanocontainers for the loading of active agents with shells possessing controlled permeability specific to several triggers and then to introduce them into the coating matrix (Fig. 10.3), Being uniformly distributed in the passive matrix, these nanocontainers will keep the... 

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