Sodium ligninsulfonate, a water soluble wide-range molecular
weight polymeric by-product of the paper pulping industry, is
added as waste effluent to water ways or burned, causing extreme
pollution. The polymer is highly resistant to biodegradation. Therefore,
modification of the structure to a more readily biodegradable
form would be desirable, to...
The study compares the differences in verbal responses between
39 Anglo-resident and 32 Anglo-migrant children in the first grade in
selected school districts in Oregon.
The children were tested for I. Q. using the Goodenough Draw-
A-Man test. They were grouped for comparison purposes by age,
sex, and by migrancy...