Immobilization of Ochrobactrum tritici As5 on PTFE thin films for arsenite biofiltration

Branco, Rita; Sousa, Teresa; Piedade, Ana P.; Morais, Paula V.

doi:10.1016/j.chemosphere.2015.12.025

Cited by 11 publications

(8 citation statements)

References 45 publications

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“…Immobilization techniques are suitable not only for wild type bacteria, but they may also be successfully used for mutant strains. Branco et al [81] used Ochrobactrum tritici As5 with inactivated arsenite efflux pumps immobilized in poly (tetrafluoroethylene) for arsenite biofiltration. Two mechanisms of microbial metals biosorption can be distinguished: metabolism-dependent, occurring only in viable microbial cells, and metabolism-independent, due to the presence of functional groups in cell envelopes.…”

Section: Metabolic Responses To Immobilizationmentioning

confidence: 99%

Metabolic Responses of Bacterial Cells to Immobilization

2016

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In recent years immobilized cells have commonly been used for various biotechnological applications, e.g., antibiotic production, soil bioremediation, biodegradation and biotransformation of xenobiotics in wastewater treatment plants. Although the literature data on the physiological changes and behaviour of cells in the immobilized state remain fragmentary, it is well documented that in natural settings microorganisms are mainly found in association with surfaces, which results in biofilm formation. Biofilms are characterized by genetic and physiological heterogeneity and the occurrence of altered microenvironments within the matrix. Microbial cells in communities display a variety of metabolic differences as compared to their free-living counterparts. Immobilization of bacteria can occur either as a natural phenomenon or as an artificial process. The majority of changes observed in immobilized cells result from protection provided by the supports. Knowledge about the main physiological responses occurring in immobilized cells may contribute to improving the efficiency of immobilization techniques. This paper reviews the main metabolic changes exhibited by immobilized bacterial cells, including growth rate, biodegradation capabilities, biocatalytic efficiency and plasmid stability.

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Section: Metabolic Responses To Immobilizationmentioning

confidence: 99%

Metabolic Responses of Bacterial Cells to Immobilization

2016

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“…Essa estirpe modificada (Ars5) foi imobilizada nas melhores condições para que as células mantivessem sua capacidade de acumulação de arsenito. Um biofiltro para remoção de arsénio foi construído imobilizando esta nova estirpe acumuladora de arsénio em superfícies modificadas por pulverização (Branco et al 2016).…”

Section: Resultsunclassified

Economia Circular em Geotecnia Ambiental - Resumos Alargados eBook

2017

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Créditos da fotografia da capa do eBook: Nelson FernandesTodos os direitos reservados. Nenhuma parte deste e-Book pode ser reproduzida, armazenada na memória de um computador ou noutro qualquer suporte de informação ou transmitida por qualquer meio, eletrónico, mecânico, fotocópia, gravação ou de outra forma, sem a permissão por escrito da editora. Nenhuma responsabilidade é assumida pelo uso das informações aqui contidas. Embora todas as precauções tenham sido tomadas na preparação deste e-Book, a editora não assume qualquer responsabilidade por erros ou omissões. Tão pouco se assume qualquer responsabilidade por danos resultantes do uso das informações aqui contidas. Minhas Senhoras e Meus Senhores, Antes de mais, quero agradecer o convite para estar presente aqui em Coimbra, na abertura deste workshop que se irá debruçar naquele que é um dos vértices da nossa política de ambiente: a economia circular.A Sociedade Portuguesa de Geotecnia, fundada há cerca de 60 anos, que conta atualmente com 600 associados, não deixa de estar na linha da frente do que são as tendências de hoje e do amanhã.

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“…Therefore, four types of boron-doped diamond films having different crystallization properties and thickness (i.e., thick-100, thin-100, 111 and polycrystalline) were deposited on substrates by means of microwave plasma-assisted chemical vapor deposition method and investigated using 11 B NMR [74]. 11 B is usually the nuclide choice in NMR since it is more sensitive and yields a sharper signal compared to the other boron nuclei, but when boron is doped in the diamond film, the signal intensity is directly affected by the amount of doped boron. Therefore, 11 B is the measured nuclei unless the sample is enriched with 10 B.…”

Section: Inorganic Filmsmentioning

confidence: 99%

“…Thin films have a massive impact on the modern era of technology and have gained unprecedented interest during the past years due to their versatile properties and potential applications [1][2][3][4][5]. They are regarded as the backbone for advanced applications in various fields, such as optical devices [6], electronic devices [7], biosensors and plasmonic devices [8][9][10], environmental [11] and biological applications [12], solar cells [13][14][15], batteries [16][17][18] and so on. This class of advanced materials is generally defined as a thin layer of material having a thickness that ranges from fractions of a nanometer (i.e., monolayer) to several micrometers [19,20].…”

Section: Introductionmentioning

confidence: 99%

Solid State NMR Spectroscopy a Valuable Technique for Structural Insights of Advanced Thin Film Materials: A Review

Nokab

Sebakhy

2021

Nanomaterials

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Solid-state NMR has proven to be a versatile technique for studying the chemical structure, 3D structure and dynamics of all sorts of chemical compounds. In nanotechnology and particularly in thin films, the study of chemical modification, molecular packing, end chain motion, distance determination and solvent-matrix interactions is essential for controlling the final product properties and applications. Despite its atomic-level research capabilities and recent technical advancements, solid-state NMR is still lacking behind other spectroscopic techniques in the field of thin films due to the underestimation of NMR capabilities, availability, great variety of nuclei and pulse sequences, lack of sensitivity for quadrupole nuclei and time-consuming experiments. This article will comprehensively and critically review the work done by solid-state NMR on different types of thin films and the most advanced NMR strategies, which are beyond conventional, and the hardware design used to overcome the technical issues in thin-film research.

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Immobilization of Ochrobactrum tritici As5 on PTFE thin films for arsenite biofiltration

Cited by 11 publications

References 45 publications

Metabolic Responses of Bacterial Cells to Immobilization

Metabolic Responses of Bacterial Cells to Immobilization

Economia Circular em Geotecnia Ambiental - Resumos Alargados eBook

Solid State NMR Spectroscopy a Valuable Technique for Structural Insights of Advanced Thin Film Materials: A Review

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