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The water hyacinth, (Eichhornia crassipes), considered as a menace to the environment if allowed to proliferate, may yet prove to be a very invaluable resource. If properly utilized, the plant has plenty of industrial and commercial uses. This study is aimed at using the protein from the plant’s leaf and its liquid by-product as food supplement and culture media for microorganisms, respectively. The protein was tested as a sensitizer, a valuable ingredient in lithography. Water hyacinths were collected from Laguna, Malabon and Diliman. Protein was extracted through heat coagulation. It was then incorporated in foodstuffs (kropeks and fishballs). Using the Friedman’s test, it was shown that both the kropeks and fishballs with crude protein were acceptable. The protein was also used to make sensitizers. It was added to ammonia water and ammonium dichromate solution in five different ammonium dichromate – water hyacinth crude protein ratios. A sensory evaluation test showed that the 1:3 ratio was comparable with the commercial brand when it comes to the clarity of prints at 10-15 minutes exposure. The liquid by-product was used as a culture media for fungi and bacteria. Results showed that E. coil was efficiently sustained by the media. The fungi Trichoderma sp. was more efficiently sustained by the czapek-dox agar used as the control medium than the water hyacinth agar did. CONTINUE READING….