Phas
Mostrando 1-12 de 97 artigos, teses e dissertações.
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1. Microbial Synthesis and Characterization of Biodegradable Polyester Copolymers from Burkholderia Cepacia and Cupriavidus Necator Strains Using Crude Glycerol as Substrate
Abstract Polymers are materials of pronounced importance in the modern world, since they are massively present in everyday life, especially in the form of packaging. However, most of these materials are derived from non-renewable sources and their disposal generates large volumes of waste, which is extremely damaging to natural environments. In this context,
Braz. arch. biol. technol.. Publicado em: 24/10/2019
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2. Orange and Passion Fruit Wastes Characterization, Substrate Hydrolysis and Cell Growth of Cupriavidus necator, as Proposal to Converting of Residues in High Value Added Product
Abstract: Brazil is the world’s largest producer of orange and passion fruit, which are destined mainly for industrialization, generating grand volumes of wastes. The solid portion of these residues is a rich source of pectin - composed mainly of galacturonic acid and neutral sugars, which through the hydrolysis process can be used in biological conversion
An. Acad. Bras. Ciênc.. Publicado em: 08/04/2019
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3. The influence of natural clay and organoclay vermiculite on the formation process of bionanocomposites with poly (3-hydroxybutyrate-co-3-hydroxyvalerate)
ABSTRACT During the last decades, a lot of research work focused on several biodegradable and biosourced polyesters for the purpose of reducing the non-degradable polymer wastes. These polyesters are particularly considered to be promising polymers for biomedical applications and short life-time products like packaging. As these packagings are rapidly discar
Matéria (Rio J.). Publicado em: 02/10/2017
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4. Simplified recovery process of Ralstonia solanacearum-synthesized polyhydroxyalkanoates via chemical extraction complemented by liquid-liquid phase separation
Poly (3-hydroxybutyrate) (P(3HB)) is the most studied thermoplastic biopolymer belonging to the polyhydroxyalkanoate (PHA) family, the main features of which include rapid biodegradability and biocompatibility. The bioplastic recovery process is an important step during production and can directly influence the characteristics of PHAs. However, more efficien
Quím. Nova. Publicado em: 2017-02
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5. Tomografia elétrica 2D e gravimetria para detecção de sítio contaminado por derivados de petróleo em área de passivo ambiental
RESUMO Foram realizados ensaios geofísicos, como caminhamento elétrico (arranjo dipolo-dipolo) com AB=MN=4 m, totalizando 1.024 m de perfis, e levantamento gravimétrico, totalizando 273 estações separadas de 4 em 4 m. Os valores máximos, mínimo, médio e desvio padrão da resistividade elétrica real em ohm.m foram, respectivamente: 35, 2.276, 432 e 3
Eng. Sanit. Ambient.. Publicado em: 2016-12
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6. Growth of Burkholderia sacchari LFM 101 cultivated in glucose, sucrose and glycerol at different temperatures
ABSTRACT Polyhydroxyalkanoates (PHAs) have attracted major industrial interest as alternatives to conventional plastics. They are produced by several bacteria as cytoplasmic inclusions when nutrients are in limited supply. Among the many factors influencing bacterial growth, the effect of temperature on both specific growth rates and growth yields in terms o
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-10
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7. SELEÇÃO POLIFÁSICA DE MICRORGANISMOS PRODUTORES DE POLIHIDROXIALCANOATOS
Polyhydroxyalkanoates (PHAs) are fully biodegradable biopolyesters produced by many prokaryotes and accumulated as insoluble cytoplasmatic inclusions. The detection of these intracellular granule is usually provided using lipofilic azodyes, which are not specific. Another way to screen PHA-producing bacteria is through culture-independent molecular technique
Quím. Nova. Publicado em: 2016-08
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8. MÉTODOS DE EXTRAÇÃO DE POLI-HIDROXIALCANOATOS A PARTIR DE BIOMASSA BACTERIANA
Polyhydroxyalkanoates (PHAs) are biodegradable and biocompatible polyesters intracellularly accumulated by many bacteria as an energy reserve material and carbon source. These biopolymers may be extracted from cells after their production phase, and the extraction process involves various individual operations to ensure adequate removal of the biopolymer fro
Quím. Nova. Publicado em: 2015-11
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9. Halotolerant bacteria in the São Paulo Zoo composting process and their hydrolases and bioproducts
Halophilic microorganisms are able to grow in the presence of salt and are also excellent source of enzymes and biotechnological products, such as exopolysaccharides (EPSs) and polyhydroxyalkanoates (PHAs). Salt-tolerant bacteria were screened in the Organic Composting Production Unit (OCPU) of São Paulo Zoological Park Foundation, which processes 4 ton/day
Braz. J. Microbiol.. Publicado em: 2015-06
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10. Volatile fatty acids influence on the structure of microbial communities producing PHAs
Polyhydroxyalkanoates (PHAs) can be produced by microorganisms and are a biodegradable alternative to fossil-fuel based plastics. Currently, the focus is on reducing production costs by exploring alternative substrates for PHAs production, and on producing copolymers which are less brittle than monomers. Accordingly, this study used a substrate consisting of
Braz. J. Microbiol.. Publicado em: 2014-06
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11. Production of polyhydroxyalkanoates (PHAs) by Bacillus subtilis and Escherichia coli grown on cane molasses fortified with ethanol
The aim of this work was to study the production of polyhydroxyalkanoates (PHAs) by Bacillus subtilis and Escherichia coli isolated from the industrial contaminated soil samples using cane molasses as an inexpensive substrate. The amount of PHA accumulated followed a similar pattern to its growth for each of treatment indicating a growth-related production,
Braz. arch. biol. technol.. Publicado em: 2014-02
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12. Produção e caracterização de polihidroxialcanoatos obtidos por fermentação da glicerina bruta residual do biodiesel
The aim of this study was to evaluate the production of polyhydroxyalkanoates (PHAs) by fermentation of Crude Glycerin, a byproduct of the biodiesel industry, by Cupriavidus necator IPT 026, 027 and 028. The influence of fermentation time and temperature in shake flasks were evaluated. The highest PHA production (2.82 g L-1) occurred at 35 ºC for 72 h of fe
Quím. Nova. Publicado em: 2014