Barrier development

The steric barrier developed upon adsorption of 1-2% of the dispersant was evidenced by a million-fold decrease in conductivity, a twenty-fold decrease in viscosity, a two-fold increase in sediment volume, but no deflocculation of any degree. 

The electrostatic barrier developed only after enough dispersant adsorbed that a concentration of dissolved dispersant of about 0.1% or more remained in the oil phase, where counterions developed as evidenced by increased conductivity, the development of large negative zeta potentials, steeply rising stability ratios, and complete deflocculation. 

Wolburg, H., and A. Lippoldt. 2002. Tight junctions of the blood-brain barrier Development, composition and regulation. Vase Pharmacol 38 323. 

A. Statz and K. Felgenhauer, Development of the blood-CSF barrier, Develop. Med. Child Neurol., 25 (1983) 152-161. 

Singer EJ, Wegmann PC, Lehman MD, Christensen MS, Vinson LJ (1971) Barrier development, ultrastructure, and sulfhydryl content of the fetal epidermis. J Soc Cosmet Chem, 22 119-137. 

Hollenberg, G.W. et al., Tritium/hydrogen barrier development, Fusion Engineering and Design, 28, 190-208 (1995). 

Konys, J. et ah. Status of tritium permeation barrier development in the EU, Fusion Science and Technology, 47, 844 (2005). 

Aiello, A., A. Ciampichetti, and G. Benamati, An overview on tritium permeation barrier development for WCLL blanket concept. Journal of Nuclear Materials, 329-333, 1398 (2004). 

Schulze, C. and Firth, J. A., Interendothehal junctions during blood-brain barrier development in the rat morphological changes at the level of individual tight junctional contacts, Dev. Brain Res., 69, 85, 1992. 

Qin, Y. and Sato, T.N., Mouse multidrug resistance la/3 gene is the earliest known endothelial cell differentiation marker during blood-brain barrier development, Dev. Dyn., 202(2), 172, 1995. 

Chaipin et al. [C3] and Massignon [MS] have described several types of diffusion banier developed in France and given examples of their characteristics. Materials from which these barriers were made include sintered alumina, oxidized aluminum, Teflon, and nickel. Pore radii were in the range of 0.01 to O.OS fan. Barriers developed in Sweden have been described by Martensson et al. [M3]. 

In the history of the barrier development (Ryser 1989), initially only the site location was considered in the next phase, landfdl liners were added as surface covers and base liners to facilitate leachate collection (during the 1970s). Since the early 1980s, attempts have been made to control reactions inside the landfdl, for example by waste compaction and gas collection. In the early the 1990s, it became evident that in order to effectively minimize landfill emissions, the prior separation of contaminants was necessary. The culmination of this development will be reached, when the inert- and residual landfill will become the norm. 

Kellex succeeded in devising a promising new barrier material in the autumn of 1943 that combined the best features of the Norris-Adler barrier and the compressed nickel-powder barrier. The problem then was what to do about the Houdaille-Hershey plant under construction in Decatur, which was designed to produce Norris-Adler. Should it be stripped and reequipped to manufacture the new barrier at the price of some delay in starting up K-25 Or should the several barrier-development teams make a final concerted effort to improve Norris-Adler to production quality Over these significant questions Groves and Harold Urey violently clashed. 

Davies P J, Horrocks A R, Kandola B K, Dalton J and Owen T (2005), Fhe resistant acoustic insulation media for commercial aircraft Recent changes in regulations and barrier developments , in conference proceedings. Fire and Materials, Interscience Communications, London, 439-448. 

Identification of the different barriers against radioactive releases (RRs), for PWRs typically the fuel cladding, the reactor vessel and primary coolant system boundaries and the containment/confinement) Identification of the possible challenges to each of these barriers Definition of a set of plant specific safety functions that are representative of the status/safety margins of each of the barriers Development of a tool — flow diagram, procedure, electronic system — to continuously monitor the status and challenges to each of the safety functions ... 

Bacteriocin sensitivity Protection by physicochemical barriers Development of resistance mechanisms... 

Mizee, M.R., Wooldrik, D., Lakeman, K.A.M., et ah, 2013. Retinoic acid induces blood-brain barrier development. J. Neurosci. 33, 1660-1671. 

Cavicchia, J. C. Sacerdote, F. L. (1991). "Correlation between blood-testis barrier development and onset of the first spermatogenic wave in normal and in busulfan-treated rats a lanthanum and freeze-fracture study." Anat Rec, 230(3), 361-8. 

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