Thayza Christina Montenegro Stamford

Learn More
Microbiological processes were used for chitin and chitosan production by Mucor circinelloides (UCP 050) grown in yam bean (Pachyrhizus erosus L. Urban) medium. The polysaccharides were extracted by alkali-acid treatment and structural investigations by X-ray diffraction, Fourier transform IR analysis, viscosity and thermal analysis by TG, DTG, and DTA were(More)
Morgana Maria Souza Gadelha de Carvalho, Thayza C. Montenegro Stamford, Emerson Pereira dos Santos, Pedro Tenório and Fabio Sampaio 1 Santa Emilia de Rodat Faculty, 58020-560, João Pessoa, Brasil 2 Oral Biology Laboratory, Health Science Center, Federal University of Paraiba, 58051-900, João Pessoa , Brasil 3 Biological Department, Biological Science(More)
This article sets out a method for producing chitin and chitosan by Cunninghamella elegans and Rhizopus arrhizus strains using a green metabolic conversion of agroindustrial wastes (corn steep liquor and molasses). The physicochemical characteristics of the biopolymers and antimicrobial activity are described. Chitin and chitosan were extracted by(More)
This study aimed to obtain chitosan (CHI) from Cunninghamella elegans cultivated in corn step liquid (CSL)-based medium under optimized conditions and to assess the efficacy of the obtained CHI in inhibiting Botrytis cinerea and Penicillium expansum in laboratory media and when applied as a coating on table grapes (Vitis labrusca L.). Moreover, the(More)
This study aimed to evaluate the cytotoxicity and bactericidal properties of four silver nanoparticle (AgNP) colloids and their ability to inhibit Streptococcus mutans biofilm formation on dental enamel. The cytotoxicity of AgNPs was evaluated based on signs of vascular change on the chorioallantoic membrane using the hen's egg test (HET-CAM). Bactericidal(More)
In vitro studies have been carried out to establish the nutritional differences between crude and refined vegetable oils; however, the impact of the consumption of these foods on metabolism, in particular the effect of buriti oil, needs to be further evaluated. The aim of this study was to evaluate the biochemical and murine parameters and the vitamin A and(More)
Biosurfactants have a number of industrial applications due their diverse properties, such as emulsification, foaming, wetting, and surface activity. The aim of the present study was to produce a biosurfactant from Candida utilis and employ it in the formulation of a mayonnaise. The biosurfactant was produced in a mineral medium supplemented with glucose(More)
The present study aimed to evaluate the antimicrobial activity and cytotoxicity of colloidal chitosan - silver nanoparticle - fluoride nanocomposites (CChAgNpFNc), with different silver nanoparticle shapes and sizes. The syntheses of CChAgNpFNc were performed with silver nitrate added to a chitosan solution, addition of a sodium borohydride solution and(More)
Microbiological processes were used for chitin and chitosan production with Cunninghamella elegans UCP/WFCC 0542 grown in different concentrations of two agro-industrial wastes, corn steep liquor (CSL) and cassava wastewater (CW) established using a 2² full factorial design. The polysaccharides were extracted by alkali-acid treatment and characterized by(More)
This study evaluated the efficacy of the combined application of chitosan (CHI) and Origanum vulgare L. essential oil (OV) in the inhibition of Rhizopus stolonifer URM 3728 and Aspergillus niger URM 5842 on laboratory media and on grapes (Vitis labrusca L.) and its influence on the physical, physicochemical and sensory characteristics of the fruits during(More)