Killer Yeasts
Mostrando 1-12 de 37 artigos, teses e dissertações.
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1. Production and Optimization of Killer Toxin in Debaryomyces hansenii Strains
ABSTRACT Postharvest diseases of fruits and vegetables result in critical losses of production in worldwide. The losses often are caused by fungi and nowadays, most fungal pathogens are controlled by several strategies such as the use of fungicides. However, most of the fungicides are chemical-based compounds and are dangerous to human health and the nature.
Braz. arch. biol. technol.. Publicado em: 02/05/2017
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2. Characteristics of Saccharomyces cerevisiae yeasts exhibiting rough colonies and pseudohyphal morphology with respect to alcoholic fermentation
Among the native yeasts found in alcoholic fermentation, rough colonies associated with pseudohyphal morphology belonging to the species Saccharomyces cerevisiae are very common and undesirable during the process. The aim of this work was to perform morphological and physiological characterisations of S. cerevisiae strains that exhibited rough and smooth col
Braz. J. Microbiol.. Publicado em: 04/03/2014
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3. Role of killer factors in the inhibitory activity of bio-control yeasts against Penicillium expansum and Aspergillus ochraceus
This work evaluated the antagonism of killer positive yeast strains (isolated from 11 samples of different frozen fruit pulps) against the strains of Penicillium expansum and Aspergillus ochraceus. Of the total 41 killer yeasts tested in YM agar, 19 showed antibiosis against P. expansum and A. ochraceus, with inhibition zone ranging from 10 to 18 mm and 10 t
Braz. arch. biol. technol.. Publicado em: 2013-08
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4. Caracterização de linhagens selvagens de Saccharomyces cerevisiae isoladas de processos fermentativos para produção de etanol. / Characterization of wild yeasts of Saccharomyces cerevisiae isolated from fermentative processes for ethanol production
Dentre as leveduras selvagens mais comumente encontradas na fermentação alcoólica, destaca-se o gênero Saccharomyces apresentando colônias rugosas com células dispostas em cachos (pseudohifas). Este biótipo de levedura tem sempre sido associado com problemas na indústria, ocasionando queda no rendimento fermentativo. Sendo assim, o presente trabalho
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/10/2011
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5. Bioprospection of yeasts as biocontrol agents against phytopathogenic molds
Yeasts isolated from sugar cane and maize rhizosphere, leaves and stalks were screened against the phytopathogenic molds Colletotrichum sublineolum and Colletotrichum graminicola, both causal agents of the anthracnose disease in sorghum and maize, respectively. Strains identified as Torulaspora globosa and Candida intermedia were able to inhibit the mold gro
Brazilian Archives of Biology and Technology. Publicado em: 2011-02
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6. Inhibition of bacteria contaminating alcoholic fermentations by killer yeasts
Este estudo mostrou a atividade antibacteriana in vitro de linhagens de leveduras killer contra bactérias contaminantes da fermentação alcoólica (Bacillus subtilis, Lactobacillus plantarum, Lactobacillus fermentum and Leuconostoc mesenteroides), em testes célula X célula e célula X toxina bruta. As bactérias não foram inibidas por linhagens killer d
Brazilian Archives of Biology and Technology. Publicado em: 2010-10
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7. Otimização da produção e purificação de compostos antimicrobianos de leveduras para desenvolvimento de um novo agente antifúngico / Optimization of production and purification of antimicrobial compounds from yeast for the development of a new antifungal agent
Infecções fúngicas em humanos vem aumentando nos últimos anos e acometem principalmente pacientes imunocomprometidos, portadores do vírus HIV, transplantados ou com câncer. Os antifúngicos empregados no tratamento pertencem a poucos grupos de fármacos e o aparecimento de resistência antifúngica em muitos patógenos leva à necessidade de desenvolvi
Publicado em: 2010
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8. Penicillium expansum versus antagonist yeasts and patulin degradation in vitro
Considerando o antagonismo e degradação de patulina detectados em Pichia membranifaciens e Sporobolomyces roseus no estudo preliminar, este trabalho avaliou o efeito antagônico de Pichia ohmeri 158 no desenvolvimento de Penicillium expansum e a degradação de patulina "in vitro". O sobrenadante do cultivo de P. ohmeri 158 inibiu 66,17% do desenvolvimento
Brazilian Archives of Biology and Technology. Publicado em: 2007-07
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9. Biotyping of industrial yeasts by the Killer system. / Biotipagem de leveduras industriais através do sistema Killer.
Agriculture is an important sector in the economy of Brazil. The sugar cane occupies 9% of the cultivated area in this country. The most important products from the sugar cane industry are sugar and alcohol, the latest produced by fermentative process by yeasts. During the fermentation the yeast population changes due to the interferences coming from the sug
Publicado em: 2004
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10. Seleção de linhagens de Saccharomyces cerevisiae potencializadas pelo fator Killer, H2S- e o carater floculante. / Improvement of a saccharomyces cerevisiae strain by the characters: "Killer" skills, flocculation capacity and lack in productinof H2S-.
Flocculative and "killer" skills and lack in production of H2S are desirable characteristics of the ethanolic fermentative yeasts. Seven selected strains of Saccharomyces cerevisiae with some of these characteristics were evaluated for confirmation of these habilities and their genetic characterization was undertaken by eletrophoretic kariotyping. The strain
Publicado em: 2003
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11. Estudo de algumas caracteristicas bioquimicas de levedura isoladas de bebidas alcoolicas andinas e brasileiras e de amostras de flores, frutas, melaço e mosto de usinas de açucar e alcool
The objective of this research was to use a variety of alcoholic beverages, molasses, and mashes from sugar and alcohol stations, flowers and fruits, as a source of yeasts for the study of the fermentation capability of the strains isolated and their possible utilization in ferment active processes. Beverages from the mountain region of the Andes, i.e. from
Publicado em: 1990
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12. Phenotypic expression of Kluyveromyces lactis killer toxin against Saccharomyces spp.
The secretion of killer toxins by some strains of yeasts is a phenomenon of significant industrial importance. The activity of a recently discovered Kluyveromyces lactis killer strain against a sensitive Saccharomyces cerevisiae strain was determined on peptone-yeast extract-nutrient agar plates containing as the carbon source glucose, fructose, galactose, m