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| Registros recuperados: 13 | |
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| FREITA,CRISTHYANE M.; FREITA,LIDYANE A.; TRALLI,LETICIA F.; SILVA,ALINE F.; MENDES,FRANCIELE Q.; TEIXEIRA,VITOR; MUTTON,MARCIA J.R.. |
| ABSTRACT One of the most important steps is to clarify the juice, which are added synthetic polymer acrylamide base, aiming the fast settling of impurities present in the juice. However, this input is expensive and may have carcinogenic and neurotoxic actions to humans. The search for new natural flocculants that have similarity with the commercial product is of great value. A bioextract that may be promising and has coagulant action is the Moringa oleifera Lam. In this context, the objective of the research was to evaluate the consequences of the use of moringa seed extracts and various concentrations of commercial polymer, such as sedimentation aids in clarifying sugarcane juice in the ethanol production, comparing the efficiency of the bioextract... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofuels; Biopolymers; Juice treatment; Moringa oleifera Lam.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000603093 |
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| Stamford,Thayza Christina Montenegro; Stamford,Tânia Lucia Montenegro; Stamford,Newton Pereira; Barros Neto,Benicio de; Campos-Takaki,Galba Maria de. |
| Microbiological processes were used for chitin and chitosan productions by Cunninghamella elegans (UCP 542) grown in a new economic culture medium. The assay was carried out to evaluate the growth of C. elegans using yam bean (Pachyrhizus erosus L. Urban) medium, in different times of growth (24, 48, 72 and 96 hrs), incubated at 28ºC in an orbital shaker at 150 rpm. The lyophilized biomass was determined by gravimetry. The polysaccharides were extracted by alkali-acid treatment, and characterized by infrared spectroscopy, titration and viscosity. C. elegans grown in the yam bean medium and produced higher yields of biomass (24.3 g/ mL) in 96 hrs. The high level was chitosan (66 mg/g), and chitin (440 mg/g) were produced at 48 and 72 hrs of growth,... |
| Tipo: Journal article |
Palavras-chave: Biopolymers; Chitin; Chitosan. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000100006 |
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| Guezennec, Jean; Moppert, Xavier; Raguenes, Gerard; Richert, Laurent; Costa, Bernard; Simon-colin, Christelle. |
| It is well known that microorganisms well-adapted to survival in extreme ecosystems could be considered as new sources of biomolecules that have biotechnological importance. On French Polynesian atolls, microbial mats are developing in water ponds exposed to fluctuations in physical and chemical parameters. In these microbial mats, which are called "kopara" by the inhabitants, bacteria coexist with cyanobacteria, and a synergistic relationship may exist between these two types of living microorganisms. A large number of cyanobacteria and bacteria have been isolated from different mats. Under laboratory conditions, these microorganisms were shown to produce various exopolymers, including exopolysaccharides and poly-beta-hydroxyalkanoates, along with... |
| Tipo: Text |
Palavras-chave: Microbial mats; Kopara; Biopolymers; Exopolysaccharides; Poly-beta-hydroxyalkanoates. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00029/14058/11423.pdf |
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| Casariego, A.; Díaz, R.; Sergrañes, Y.; Nieto, O. M.; Durán, C.; López, N; Rodríguez, M.; González, J.. |
| Se elaboraron películas a partir de disoluciones a 3 % (m/v) de quitosana en ácido láctico a 1% (v/v), empleando glicerina, sorbitol o polietilenglicol como plastificante en concentraciones de 0,25 a 0,50 mL/g de quitosana. Se midieron el esfuerzo tensil, elongación, fuerza de ruptura, deformación y el espesor de las películas, con el objetivo de evaluar la influencia de la masa molar y concentración de plastificante sobre sus propiedades mecánicas. Se obtuvieron los modelos matemáticos que relacionan estos factores. Las películas con polietilenglicol, presentaron mayor esfuerzo tensil y fuerza de ruptura normalizada que las plastificadas con glicerina o sorbitol, pero resultaron menos elásticas y deformables, además, mientras mayor fue la concentración de... |
| Tipo: Journal Contribution |
Palavras-chave: Mechanical properties; Chitosan; Biopolymers; Elasticity. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/5095 |
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| Chalkiadakis, Eletherios; Dufourcq, R.; Schmitt, Sophie; Brandily, Christophe; Kervarec, N.; Coatanea, Denis; Amir, H.; Loubersac, Lionel; Chanteau, S.; Guezennec, Jean; Dupont-rouzeyrol, M.; Simon-colin, Christelle. |
| Aims Exopolysaccharides (EPS) are industrially valuable molecules with numerous useful properties. This study describes the techniques used for the identification of a novel Vibrio bacterium and preliminary characterization of its EPS. Methods and Results Bioprospection in marine intertidal areas of New Caledonia followed by screening for EPS producing brought to selection of the isolate NC470. Phylogenetic analysis (biochemical tests, gene sequencing and DNADNA relatedness) permitted to identify NC470 as a new member of the Vibrio genus. The EPS was produced in batch fermentation, purified using the ultrafiltration process and analysed by colorimetry, Fourier Transform Infrared spectroscopy, gas chromatography, Nuclear Magnetic Resonance and HPLC-size... |
| Tipo: Text |
Palavras-chave: Biopolymers; Biotechnology; Exopolysaccharide; Fermentation biotechnology. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00144/25501/24036.pdf |
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| LOPES,SUSIANY; BUENO,LUCIANO; AGUIAR JÚNIOR,FRANCISCO DE; FINKLER,CHRISTINE. |
| ABSTRACT This paper describes the preparation and characterization of alginate beads coated with gelatin and containing Lactobacillus rhamnosus. Capsules were obtained by extrusion method using CaCl2 as cross linker. An experimental design was performed using alginate and gelatin concentrations as the variables investigated, while the response variable was the concentration of viable cells. Beads were characterized in terms of size, morphology, scanning electron microscopy (SEM), moisture content, Fourier Transform Infrared Spectrometry (FTIR), thermal behavior and cell viability during storage. The results showed that the highest concentration of viable cells (4.2 x 109 CFU/g) was obtained for 1 % w/v of alginate and 0.1 % w/v of gelatin. Capsules were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Probiotics; Biopolymers; Functional foods; Microencapsulation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401601 |
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| Bellini,Márcia Zilioli; Oliva-Neto,Pedro de; Moraes,Ângela Maria. |
| In this study, the effects of the origin of xanthan used, in combination with chitosan, to prepare films for the treatment of skin lesions were evaluated. The characteristics of the films obtained with xanthan commercially available for the food industry sector and xanthan originated from a fermentation process conducted in a pilot plant were compared. Results showed that the source did not strongly interfere in many of the properties of the films, such as the mechanical properties, cytotoxicity to L929 cells, absorption of simulated body fluid and culture medium, stability in water and saline solution. Hence, even though the properties of biopolymers of different sources might vary, the films prepared with two distinct types of xanthan gum could be... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomaterials; Biopolymers; Films; Membranes; Properties and characterization; Biomedical applications. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000200289 |
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| Fontana,Luiz F.; Silva,Frederico S. da; Figueiredo,Natália G. de; Brum,Daniel M.; Netto,Annibal D. Pereira; Gigueiredo Junior,Alberto G. de; Crapez,Mirian A.C.. |
| The distribution of selected aromatic compounds and microbiology were assessed in superficial sediments from Suruí Mangrove, Guanabara Bay. Samples were collected at 23 stations, and particle size, organic matter, aromatic compounds, microbiology activity, biopolymers, and topography were determined. The concentration of aromatic compounds was distributed in patches over the entire mangrove, and their highest total concentration was determinated in the mangrove's central area. Particle size differed from most mangroves in that Suruí Mangrove has chernies on the edges and in front of the mangrove, and sand across the whole surface, which hampers the relationship between particle size and hydrocarbons. An average @ 10% p/p of organic matter was obtained, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbiologic activity; Guanabara Bay; Biopolymers; Phenol; Aromatic Polycyclic Hydrocarbons and Monoaromatics. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400022 |
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| Registros recuperados: 13 | |
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