Observations on the role of blue-green algae on rice yield compared with that of conventional fertilizers

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Rôle of blue-green algae and different methods of partial soil sterilization on rice yield

Results of experiments during three consecutive seasons on the rôle of blue-green algae in combination with partial soil sterilization and chemical nutrients indicate high responses to algae inoculation and a fertility build-up of the soil. It is also seen that blue-green algae tend to produce better response in soils which are poor

COMPUTERIZED IN VITRO TEST FOR CHEMICAL TOXICITY BASED ON TETRAHYMENA SWIMMING PATTERNS

An apparatus and a method for rapidly determining chemical toxicity have been evaluated as an alternative to the rabbit eye initancy test (Draize). The toxicity monitor includes an automated scoring of how motile biologi-cal cells (Tetrahymena pyriformis) slow down or otherwise change their swimming patterns in a hostile chemical environment. The method, called the Motility Assay (MA), is tested for 30 s to determine the chemical toxicity in 20 aqueous samples containing trace organics and salts. With equal or better detection limits, results compare favorably to in vivo animal tests of eye irritancy