Spelling suggestions: "subject:"permeability"" "subject:"ermeability""
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Permeability and strength of soils as affected by dispersion agentsYalcin, Mete. January 1959 (has links)
Call number: LD2668 .T4 1959 Y34
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THE EFFECT OF SEVERAL ALCOHOL SOLVENTS ON THE MOVEMENT OF CADMIUM, NICKEL AND ZINC THROUGH THREE SOILS (HEAVY METALS, ORGANICS).Stitzer, Linda Schnabel. January 1985 (has links)
No description available.
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The influence of gut integrity on growth faltering in Third World countriesNorthrop-Clewes, Christine Anne January 1996 (has links)
No description available.
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Studies on the mode of action of penetration enhancersTaylor, Peter Mark January 1989 (has links)
No description available.
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Studies on the molecular basis for activation of phospholipase Aâ†2 found in inflammatory exudatesLi, Yan January 1995 (has links)
No description available.
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The development of test procedure to determine the potential durability of concrete structuresAdham, Tarek Abbas January 2000 (has links)
No description available.
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Studies into the role of vascular endothelial growth factor in pre-eclampsiaHunter, A. J. January 2001 (has links)
No description available.
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High precision stable isotope imaging of groundwater flow dynamics in the chalk aquifer systems of Cambridgeshire and NorfolkGeorge, Michael A. January 1998 (has links)
No description available.
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Effects of X-Irradiation on Na22 Efflux in Isolated NervesYang, Chui-hsu 01 1900 (has links)
The purpose of this study was twofold: 1) to present experimental data on changes in permeability of fibers during irradiation using Na22 as the tracer isotope, and 2) to attempt to correlate these findings with the electrical changes observed.
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Waste encapsulation in cement matricesHarrower, Jason Scott January 1997 (has links)
Ion exchange resins have been used for retrieving radiocaesium from aqueous waste streams since the earliest days of the nuclear power industry. The physical and chemical properties of Lewatit DN ion exchange resins encapsulated in silica fume (SF)-blended cement were investigated with the aim of producing a stable solid wasteform for possible future disposal in an underground repository. Expansive reactions involving resin swelling in the high pH pore fluid and Ca(OH)2 formation around the resin particles can be suppressed by the addition of 50-75% SF at w/c ratios of 1.400-1.71. The basis of this suppression is the pozzolanic reaction between Ca(OH)2 and SF which consumes Ca(OH)2 and lowers the pH of the pore fluid to less than 10. The total heat evolution of blended cements is similar to that of a neat Portland cement, demonstrating the exothermic nature of the pozzolanic reaction. The use of high w/c ratios in cements containing 50% SF increases the permeability of the matrix. Porosity measurements indicate that this is due to the high free water content of the paste and the relatively high porosity of SF agglomerates. Elevated curing temperatures (up to 85oC) also increase the permeability as a result of coarsening of the microstructure. Despite the inferior physical immobilisation of caesium in high SF-content cements, leach tests, sorption measurements and pore fluid analysis show that chemical retention of caesium is enhanced by blending, more so in blends containing a permanent excess of SF, due to the formation of highly sorptive silica gel and low ratio C-S-H (Ca/Si as low as 0.80). On the other hand, SF-blended cements are more susceptible to physiochemical degradation in simulated groundwater's containing MgSO4. Chemical attack by MgSO4 converts C-S-H gel and silica gel to a non-cementitious magnesium silicate hydrate (identified as sepiolite) in 50-75% SF pastes, resulting in extensive deterioration of the attacked zone.
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