Permeability separators

Corrosion-resistant coatings and high-permeability separation membranes. 

Reactor 20 [R 20] Permeable-separation Membrane Chip Reactor... 

A large part of the biosynthetic capacity of a plant cell is localized in plastids, which are self-replicating organelles surrounded by a doublemembrane envelope. Plastids are present in most cells of photosynthetic eukaryotes. In most angiosperms, however, sperm cells lack plastids, a fact that makes plastid inheritance solely maternal. The envelope is composed of an outer and inner membranes, which differ in their permeability, separated by a 10 to 20-nm gap. The plastids contain DNA that is concentrated in a section of the stroma, which is the background matrix of the plastid. The plastidial ribosomes are smaller that the cytoplasmic ribosomes. 

Note in particular that the ratio of the Ks as represented above is not the selectivity as would be defined by the permeability ratios—that is, by oii j = PilPj- Furthermore, the selectivity as used here is different from the concept of relative volatility, which is the ratio of the. Si-values, one to another. Furthermore, the ratio of the Si s so determined will be lower than would be suspected from the ratio of the permeabilities. The implication is that the ensuing permeability separations will be much less sharp than would be suspected from the permeability ratios or selectivities. 

H. I. Mahon, Permeability Separately Apparatus and Process Using Hollow Fibers, U,S. 

Electrochemical reactors necessarily involve both cathodic and anodic reactions and the cell may be divided by an ion permeable separator (figure 2). 

In many cases, an ion permeable separator can alleviate problems via ... 

Ekem RJ, Armacanqui ME, Rose JI (1997) Reduced environmental hazard Leclanche cell having improved performance ionically permeable separator. US Patent 5,604,054, 18 Feb 1997... 

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