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A comparison of dual-functional whey hydrolysates by the use of commercial proteases Ciênc. Tecnol. Aliment.
ROSA,Luísa Ozorio Lopes da; SANTANA,Marcelo Cerutti; AVEZEDO,Tatiana Lima; BRÍGIDA,Ana Iraidy Santa; GODOY,Ronoel; PACHECO,Sidney; MELLINGER-SILVA,Caroline; CABRAL,Lourdes Maria Correa.
Abstract Whey is well-known for the functional and bioactive properties of its proteins and peptides, which are of great interest to food and nutraceutical industries. The aim of this study was to investigate the effect of four different commercial proteases (Novo ProD® (NPD), Alcalase® (ALC), Pancreas Trypsin® (TRY), and Flavourzyme® (FLA)) in the generation of hydrolysates with emulsifying and antioxidant activities. Hydrolysis processes were carried out for 5 h, reaching maximum degrees of 18.5, 15.5, 9.2, and 8.7% for NPD, ALC, TRY, and FLA, respectively. All tested enzymes generated very diverse, but conservative peptide profiles when comparing the treatments along the time, with the main enzymatic actions up to 120 min-reaction. An increase in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Whey protein; Hydrolysis; Functionality; Emulsification; Antioxidant activity.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000500031
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Biosurfactant Production by Bacillus strains isolated from sugar cane mill wastewaters BABT
Santos,Elane Cristina Lourenço dos; Miranda,Daniele Alves dos Reis; Silva,Amanda Lys dos Santos; López,Ana Maria Queijeiro.
Abstract Biosurfactants possess diverse chemical properties and provide important characteristics to the producing microorganisms, which can act as surface-actives and emulsifiers of hydrocarbon and others water insoluble substances. Most of them are lipopeptides synthetized by Bacillus. This study evaluated the biosurfactant production by strains of Bacillus previously obtained from liquid residues of sugar-alcohol industry. The bacterial isolates LBPMA: BSC, BSD, J1, J2 and L1 were cultivated in medium that induces production of biosurfactants (Landy medium). During 48 h of incubation, at intervals of 12 h, the total contents of proteins, reducing carbohydrates and surfactant activity of the filtrated growth media free of cells were evaluated. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Emulsification; Oil dispersion; Lubricant oil waste; Bioremediation.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100700
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Etude du comportement à court terme de produits chimiques flottants après leur déversement en mer et recherche d'un indicateur d'exposition biologique ArchiMer
Mamaca, Emina.
Large volumes of chemicals are produced each year. Shipment of these chemicals by boats and barge transiting along coastal marine route are numerous. Recent examples of chemical spills as Eiwa Maru (2002) sinking with 5000 T of xylène from 20 nm of Tokyo and less far from our coastline the Ievoli Sun (2000) which sank and release 1000 T of styren has raised concern about the general lack of information of the fate of chemicals at sea and the impact on fauna and flora. The goal of this study is to characterize the behaviour of some selected chemicals at sea in order to evaluate the cinetic of natural dispersion, emulsification and evaporation. This study is done in three scale : in laboratory with a new methodologie created for this purpose, in a pilot...
Tipo: Text Palavras-chave: NRRT; Biomarker; Field trial; Emulsification; Natural dispersion; Vegetable oil; Chemicals; NRRT; Biomarqueur; Experimentation en mer; Émulsification; Dispersion naturelle; Huiles végétales; Produits chimiques.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/these-2460.pdf
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Production and characterization of a biosurfactant produced by Streptomyces sp. DPUA 1559 isolated from lichens of the Amazon region BJMBR
Santos,A.P.P.; Silva,M.D.S.; Costa,E.V.L.; Rufino,R.D.; Santos,V.A.; Ramos,C.S.; Sarubbo,L.A.; Porto,A.L.F..
Surfactants are amphipathic compounds containing both hydrophilic and hydrophobic groups, capable to lower the surface or interfacial tension. Considering the advantages of the use of biosurfactants produced by microorganisms, the aim of this paper was to develop and characterize a biosurfactant produced by Streptomyces sp. DPUA1559 isolated from lichens of the Amazon region. The microorganism was cultured in a mineral medium containing 1% residual frying soybean oil as the carbon source. The kinetics of biosurfactant production was accompanied by reducing the surface tension of the culture medium from 60 to values around 27.14 mN/m, and by the emulsification index, which showed the efficiency of the biosurfactant as an emulsifier of hydrophobic compounds....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactant; Surface tension; Emulsification; Streptomyces; Soybean frying oil.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000200606
Registros recuperados: 4
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