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结果 51-60 的 113
New Mine sealing techniques for water pollution abatement
1970
Highlights of selected air pollution research grants
1970
Control and disposal of cotton-ginning wastes
1970
Potential pollution of the Ogallala by recharging Playa Lake water--pesticides
1970
Wells, Dan M. | Huddleston, Ellis W. | Rekers, Robert G.
Feasibility study of regenerative fibers for water pollution control
1970
Fuest, R. W. | Smith, Malcolm Jules
High molecular weight organic polymers co-spun with fiber-forming polymers and cross linking agents have been successfully spun into fiber and chemically treated to produce ion exchanging fibers, as opposed to the conventional beads. Styrene sulfonic acid cation exchange fibers having capacities up to 4.2 meg/gm dry fiber were prepared, using polypropylene and polybutadiene as fiber-forming polymer and cross linking agent respectively. Selectivities of fibers were similar to those of conventional beads, but different selectivities for the fibers may be possible due to anisotropic swelling of the fibers. Several other types of fibers were successfully fabricated.
显示更多 [+] 显示较少 [-]Coastal/estuarine pollution
1970
Sinha, Evelyn
The politics of pollution
1970
Davies, J. Clarence
Water pollution in the Greater New York Area
1970
Air pollution in Donora
1970
Schrenk, H. H. (Helmuth Herman)
