6 documents found, page 1 of 1
Manganese ferrite graphene nanocomposite synthesis and the investigation of its...
Soletti,Lara de Souza; Ferreira,Maria Eliana Camargo; Kassada,Alex Toshio; Abreu Filho,Benício Alves de; Bergamasco,Rosangela; Yamaguchi,Natália UedaAbstract The main objective of this study was to synthesize a nanocomposite using graphene and manganese ferrite nanoparticles (MnFe2O4-G) and to evaluate its antibacterial activity for water treatment purposes. Its morphological characteristics were evaluated by instrumental techniques, such as scanning electron microscopy and transmission electron microscopy. The characterization results indicated that the na...
Contribution of environmental factors in the formation of biofilms by Alicyclob...
Dutra,Tatiane Viana; Prado,Daniela Biral do; Anjos,Márcia Maria dos; Machinski Junior,Miguel; Mikcha,Jane Martha Graton; Abreu Filho,Benício Alves deABSTRACT: The objective of this study was to evaluate the effect of the initial microbial load, temperature and contact time on the biofilm formation of Alicyclobacillus acidoterrestris on stainless steel and natural food-grade rubber using orange juice as culture medium. The low initial load of A. acidoterrestris (2 log CFU/mL) led to biofilm formation on the stainless steel surface after 48 h of contact at 28...
Antifungal activity and inhibition of aflatoxins production by Zingiber officin...
Nerilo,Samuel Botião; Romoli,Jéssica Cristina Zoratto; Nakasugi,Lydiana Polis; Zampieri,Natana Souza; Mossini,Simone Aparecida GaleraniABSTRACT: Essential oils are possible alternatives to the use of synthetic pesticides for control of fungal contamination. Ginger (Zingiber officinale) essential oil (GEO) is known for having antifungal and antiaflatoxigenic properties, but its use as a fumigant in situ has not been studied yet. The aim of this study was to evaluate GEO’s effects upon Aspergillus flavus as a fumigant agent in stored maize grain...
Activity of Piperaceae extracts and fractions in the control of Phytomonas serpens
Cancini,Neriani de Souza; Beraldo-Borrazzo,Jesieli; Menezes,Jéssica Lima de; Cortez,Diógenes Aparício Garcia; Valdez,Rodrigo HinojosaABSTRACT: Protozoa of the genus Phytomonas are harmful parasites to several agricultural crops of economic importance. Due to their recognized biological activity, crude extracts of Piper aduncum, P. crassinervium, P. hispidum, and P. amalago leaves, were tested using the microdilution plate technique to assess the antiparasitic potential against Phytomonas serpens. Results showed that the ethanolic crude extra...
BIOSYNTHESIS OF INDUSTRIAL ENZYMES BY FREE AND IMMOBILIZED Alicyclobacillus spp...
Ruiz,Suelen Pereira; Miyoshi,Juliana Harumi; Gimenez,Gabriela Gregolin; Martinez,Camila Ortiz; Abreu Filho,Benício Alves de; Matioli,GracietteThe biosynthesis of amylase and collagenase, produced by A. acidocaldarius and A. sendaiensis respectively, were studied, and different matrices evaluated for the microorganisms immobilization and enzymes production optimization, such as loofa sponge, alginate-sponge and alginate, followed by concentration through ultrafiltration. Using a wheat bran substrate, the amylase enzyme displayed enzymatic activity of ...
The occurrence of Aeromonas spp. in the bottled mineral water, well water and t...
Scoaris,Denise de Oliveira; Bizerra,Fernando Cezar; Yamada-Ogatta,Sueli Fumie; Abreu Filho,Benício Alves de; Ueda-Nakamura,Tânia; Nakamura,Celso VataruThe aim of this work was to study the occurrence of Aeromonas sp in the bottled mineral water, well water and tap water from the municipal supplies. Positive samples were found for Aeromonas spp. 12.7% from the mineral water, 8.3% from the artesian water and 6.5% from the tap water. The recovery of Aeromonas spp. was significantly higher in the bottled mineral and artesian water than in the tap water from munic...