ESTUDO DO DERIVADO DO ÓLEO DE RICINUS COMMUNIS L. (MAMONA) COMO AGENTE BIOCIDA E REDUTOR DA VISCOSIDADE PRODUZIDA POR LEUCONOSTOC MESENTEROIDES EM INDÚSTRIAS SUCROALCOOLEIRAS

• Autor(a) principal: Messetti, M.a. [UNESP]
• Data de Publicação: 2020
• Outros Autores: Santos, A.m. Dos [UNESP], Angelis, D.f De [UNESP], Chierice, G.o., Claro, S.
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• DOI: 10.1590/1808-1657v77p3012010
• Texto Completo: http://dx.doi.org/10.1590/1808-1657v77p3012010; http://hdl.handle.net/11449/211996
• topic: Poliquilgerm®; Leuconostoc mesenteroides; castor oil; viscosity; Poliquilgerm®; Leuconostoc mesenteroides; mamona; viscosidade

Castor-oil, extracted from seeds of Ricinus communis L., is normally used in natura or in its modified form in the medical, pharmaceutical and industrial areas. One of its chemical derivates – Poliquilgerm® – has shown antifungal properties on Candida albicans, and bacteriostatic/bactericide effects on Escherichia coli reaching 99.9%. Considering these features, in the present study Poliquilgerm® was applied in cultures of Leuconostoc mesenteroides, a frequent contaminant bacterium of musts in the sugar and alcohol industries. This bacterium, when a contaminant of must, produces lactic acid as well as dextran, a polymer of glucose which may increase the viscosity of fluids in the operation. The present study evaluated the effect of different concentrations of Poliquilgerm® on viscosity produced by L. mesenteroides cultures under different conditions of various culture media, pH and temperature. A 20.56% decrease in viscosity was verified when 1.0% of the product was used, and bacterium growth inhibition after 20 hours in media with 1.0 and 0.2% of Poliquilgerm®. L. mesenteroides showed a higher growth rate in pH 6.0, at both 28 and 33º C, evidenced by greater biomass production. Also, in the culture media at this pH a greater decrease in viscosity percentages was verified at both concentrations used. The media with these same concentrations reached up to 100% decrease of UFC/mL after 24 hours in the presence of the product, observed by biomass quantification and confirmed by the Pour Plate technique.