A5080043009- biodegradable polymer synthesis and properties
- Microplastics and Plastic Pollution
- Enzyme Catalysis and Immobilization
- Polysaccharides Composition and Applications
- Polysaccharides and Plant Cell Walls
- Chromium effects and bioremediation
- Biofuel production and bioconversion
- Agricultural and Food Sciences
- Graphene and Nanomaterials Applications
- Nanocomposite Films for Food Packaging
- Enzyme Production and Characterization
- Bioeconomy and Sustainability Development
- Catalysis for Biomass Conversion
- Electrospun Nanofibers in Biomedical Applications
- Additive Manufacturing and 3D Printing Technologies
- Extraction and Separation Processes
- Growth and nutrition in plants
- Advanced Polymer Synthesis and Characterization
- Animal Diversity and Health Studies
- Biopolymer Synthesis and Applications
- Wastewater Treatment and Nitrogen Removal
- Plant Pathogenic Bacteria Studies
- Recycling and Waste Management Techniques
- Agricultural Engineering and Mechanization
- Microbial Metabolic Engineering and Bioproduction
Universidade Federal de Pelotas
2015-2025
Brazilian Institute of Geography and Statistics
2021
Departamento de Ciência e Tecnologia
2017
For decades, conventional plastics obtained from fossil-based sources have been used indiscriminately due to their durability and resistance. However, use is problematic because of rapid disposability slow degradation. Growing scientific interest in the environmental issues associated with rising consumption has become increasing importance search for biodegradable substitutes. Poly (3-hydroxybutyrate) (P(3HB)) one most studied characterized microbial biopolymers family polyhydroxyalkanoates...
Films based on pure native starch have limited applications, are easily breakable, very hygroscopic, and permeable to water vapor. One method for improving these properties is modify by cross-linking. The aim was evaluate the effect of addition sodium trimetaphosphate (STMP), sulfate (SS) cassava (S) modified films using a 23 factorial design comparing concentration crosslinkers (5.0, 12.5 20% STMP), SS (3.0, 9.0 15%) 7.5 10%) m/v. All cross-linked had better easiness handling, continuity,...
Xanthan is a highly relevant commercial microbial biopolymer. Its production occurs in two steps: the bacterium cultivated nitrogen-rich medium for cell multiplication, and obtained biomass used as an inoculum polymer phase. Different media compositions growth were investigated, seeking to reduce or replace peptone standard medium. Peptone (P), yeast extract (YE), rice parboiling water (RPW) concentration combinations tested cultivating Xanthomonas arboricola pv. pruni 101. A CRD 23 design,...
Poly (3-hydroxybutyrate) (P(3HB)) is the most studied thermoplastic biopolymer belonging to polyhydroxyalkanoate (PHA) family, main features of which include rapid biodegradability and biocompatibility.The bioplastic recovery process an important step during production can directly influence characteristics PHAs.However, more efficient methods for P(3HB) are necessary make it economically viable.The aim present study was improve standard, chloroformbased, extraction P(3HB).The polymer...
Poly(3-hydroxybutyrate) (P(3HB)) is a biodegradable plastic biopolymer that accumulates as lipophilic inclusions in the cytoplasm of some microorganisms. The biotechnological process by which P(3HB) synthesized occurs two phases. first phase involves cell growth complex culture medium, while second polymer accumulation presence excess carbon sources. As such, efficiency depends on phase. aim this study was to evaluate media with different concentrations sucrose and glucose pH values inoculum...
The intracellular accumulation of polyhydroxyalkanoates (PHAs) normally occurs after cell growth, during the second fermentation stage and under nutrient-limited conditions in presence a carbon excess. However, some microorganisms are able to accumulate PHAs as poly(3-hydroxybutyrate) [P(3HB)] first stage, growth phase, without nutrient limitation, once they have been reported utilize type II metabolism polymer phase. This study evaluated effect aeration agitation on P(3HB) Ralstonia...
Poli(3hidroxibutirato) ou P(3HB) é um bioplástico biodegradável e biocompatível da família dos polihidroxialcanoatos com propriedades térmicas mecânicas semelhantes ao polipropileno. Isso os torna possíveis substitutos plásticos convencionais lhes confere ampla possibilidade de aplicação em itens descarte rápido, como embalagens, produtos para saúde. outros são sintetizados por bioprocessos onde bactérias convertem a fonte carbono corpos lipofílicos armazenado intracelularmente reserva...
The maintenance of viable and stable Xanthomonas cells is crucial for the xanthan reliable research industrial production. method, storage recovery conditions should preserve both viability phenotypical genotypical features. Here, effectiveness classical methods on long-term preservation different arboricola pathovar pruni strains was to determine. Strains were preserved by monthly sub-culturing in solid medium lyophilization. After 12 years strains, assessed, as well their productive...
The effect of different culture media containing nitrogen sources (F4, urea; BEI, tryptose and yeast extract; MM, ammonium sulfate), carbon (glucose, sucrose), salinity (0, 5, 50 100 g/L NaCl) on the accumulation physiochemical properties poly(3-hydroxybutyrate) from Ralstonia solanacearum was evaluated. biomass concentration, measured by optical density (OD600nm) dry cell weight (DCW); total residual sugars; pH were studied. best condition MM medium sucrose, resulting in an OD600nm 16.8,...
A ampla utilização dos plásticos petroquímicos aliada à lenta degradação os torna um grave problema ambiental. Assim, cresce o interesse por materiais substitutos. Uma alternativa é poli(3-hidroxibutirato) [P(3HB)], biopolímero microbiano biodegradável produzido usando fontes de carbono renováveis. Objetivou-se avaliar, meio delineamento composto central rotacional crescimento celular (densidade óptica-DO600nm) e massa seca (MCS) Bacillus megaterium CN3 na produção inóculo, visando aumentar...