Permeability control

Permeability control Silica flour, gas bubble-producing additives ... 

D. H. Hoskin and L. D. Rollmann. Polysilicate esters for oil reservoir permeability control. Patent EP 283602,1988. 

Permeability control of solutes through thermosensitive hydrogel membranes may be thought of in terms of the degree of hydration and kinetics of... 

Y Okahata, H Noguchi, T Seki. Functional capsule membranes. 26. Permeability control of polymer-grafted capsule membranes responding to ambient pH changes. Macromolecules 20 15-21, 1987. 

Prokop, A., Kozlov, E., Carlesso, G. and Davidsen, ]. M. Hydrogel-Based Colloidal Polymeric System for Protein and Drug Delivery Physical and Chemical Characterization, Permeability Control and Applications. Vol. 160, pp. 119-174. 

Y. Okahata, G. Enna, K. Taguchi, and T. Seki, Electrochemical permeability control through a redox bilayer film. J. Am. Chem. Soc. 107, 5300-5301 (1985). 

A comparison of Tables 1 and 5 reveals the novelty of our multicomponent approach to capsule formation and permeability control. Of the existing chemistries in Table 5 only capsules 3,4, and 5 conform to our recipe (technol-... 

Figure 7.5 Mucosal-to-submucosal (m-s), Tapp values across human buccal culture of midazolam (CYP3A4 substrate), bufuralol (CYP2D6 substrate), tolbutamide (CYP2C9 substrate), and the nonmetabolized, high-permeability control compound caffeine (average SEM, N = 1 — 3 replicates). (Asterisk) in the presence of CYP inhibitors (CYP3A4-ketoconazole CYP2D6-quinidine CYP2C9-suphaphenazole). In all treatments integrity of the culture was verified by permeation of Lucifer yellow (< 2.0 x 10-6 cm/s). Results from internal study by Absorption Systems Company.

Wax esters are present in the roe oil, but not in other muscle and intestine tissues in amber fish (Seriola aureovittata) (Joh et al., 1995). Wax esters are specifically located in mullet roes (Mugil caphalus) and nowhere else in the fish (Lyengar and Schlenk, 1967). The wax esters in roes, like those in muscles, may play a role in buoyancy, permeability control,... 

Maal0e, S., 1982. Geochemical aspects of permeability-controlled partial melting and fractional crystallization. Geochim. Cosmochim. Acta, 46 43-57. 

Antipov AA, Sukhorukov GB, Leporatti S et al (2002) Polyelectrolyte multilayer capsule permeability control. Colloids Surf A 198 535-541... 

Substrate organization in membrane mimetic systems leads to altered solvation, ionization and reduction potentials and, hence, to altered reaction rates, paths and stereochemistries. These properties have been advantageously exploited, in turn, for reactivity control, catalysis, drug delivery and artificial photosynthesis (8). There are only limited examples of the utilization of membrane mimetic systems in permeability control. In order to gain insight into this important area, we have initiated a research program in BLMs. A status report of our activities in this area will be summarized in the next section. 

Hydrogel-Based Colloidal Polymeric System for Protein and Drug Delivery Physical and Chemical Characterization, Permeability Control and Applications... 

Keywords. Nanoparticle, Water-soluble polymers, Hydrophilic drugs, Protein delivery, Drug delivery, Antigen delivery, Processing, Permeability control... 

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