Nata organisms: an overview on the fermentative microbial ecosystem

Publicado em "Abstracts of papers - American Chemical Society", vol. 245The Acetobacter and Gluconacetobacter genus (both from the Acetobacteraceae family) are the most notable acetic acid producers, their intermediate metabolites being exploited biotechnologicaly for the production of vinegar, Kombucha, cocoa and nata de coco. Extensive efforts are being made to better understand the dynamic interplay of microbial populations during fermentation processes, with ample literature existing on virtually every food product currently being consumed. In the case of nata de coco, Gluconacetobacter strains have been found to play a key role in cellulose production. Despite abundant literature with isolated cellulose−producing strains, little work has been done in analysing population dynamics of the microbial communities. This presentation will address the microbial interplay in the production of nata de coco, with an overview of the taxonomy of the major acetic acid strains involved. An overview on the efforts and potential implications of upgrading nata de coco production through biotechnology will also be addressed

Bacterial cellulose from lab to market

Book of Abstracts of CEB Annual Meeting 2017Bacterial nanocellulose (BNC) is a nanofibrilar exopolysaccharide synthesized by certain Gram-negative, obligate aerobic, acetic acid bacteria, the Komagataeibacter genus being the most important due to the high cellulose yield obtained. The unique properties of this biopolymer have supported a wide range of potential applications, in human and veterinary medicine, odonthology, pharmaceutical industry, acoustic and filter membranes, biotechnological devices and in the food and paper industry. The largescale production of BNC, through advanced biotechnology has eluded many researches. Historical attempts but on low volume and high-value (mostly for biomedical applications) production can be traced back to the 90s. This presentation will show the main work with BNC by the Funcarb group. Examples of these studies will include the use of BNC in biomedical and food applications. Finally, an overview on the main efforts towards the production of BNC at large scale and potential markets will also be presented.info:eu-repo/semantics/publishedVersio

Bacterial NanoCellulose: what future?

Acetic acid bacteria (AAB) have been used in various fermentation processes. Of several ABB, the bacterial nanocellulose (BNC) producers, notably Komagataeibacter xylinus, appears as an interesting species, in large part because of their ability in the secretion of cellulose as nano/microfibrils. In fact, BNC is characterized by a native nanofibrillar structure, which may outperform the currently used celluloses in the food industry as a promising novel hydrocolloid additive. During the last couple of years, a number of companies worldwide have introduced some BNC-based products to the market. The main aim of this editorial is to underline the BNC potentials.info:eu-repo/semantics/publishedVersio

A spin-offs journey into achieving marketable products from bacterial cellulose

[Excerpt] Academic spin-offs, technological ventures born inside Universities, have increasingly strengthen the connections between the scholarship and the economy, by fostering the role of technology transfer and knowledge commercialization. This presentation will outline the major steps in taking an idea or a technology to market, growing the venture and aiming at securing a successful exit. Also, it will present BCTechnologies (Bacterial Cellulose Technologies), a spin-off from the University of Minho (Portugal). (...

Bacterial cellulose: from biotechnology to bio-economy

Bacterial cellulose (BC) is a nanofibrillar exopolysaccharide synthesized by certain Gramnegative, obligate aerobic, acetic acid bacteria, the Komagataeibacter genus being the most important due to the high cellulose yield obtained. The unique properties of this biopolymer have supported a wide range of potential applications, in human and veterinary medicine, odontology, pharmaceutical industry, acoustic and filter membranes, biotechnological devices and in the food and paper industry. The large-scale production of BC, through advanced biotechnology has eluded many researches. Historical attempts but on low volume and highvalue (mostly for biomedical applications) production can be traced back to the 90s. This presentation will overview the potential uses of BC in several applications. Also, it will present Satisfibre, S.A., a spin-off from the University of Minho (Portugal). Through R&D activities, networking & partnering with industry, Satisfibre aims to bring new and improved solutions, based on the use BC, to the food sector, biomedical, composites, pulp & paper and textile industries. Examples of successful product development and industry networking will be shown. Finally, an overview on the main efforts towards the production of BC at large scale and potential markets will also be presented.info:eu-repo/semantics/publishedVersio

La fragmentación al costado del camino: las practicas espaciales de los residentes de barrios cerrados

Na modernidade, as inseguranças da vida na metrópole desencadeiam estratégias de autossegregação em espaços residenciais fechados. Assim, o objetivo geral desta pesquisa é investigar as práticas espaciais dos moradores de espaços residenciais fechados da área metropolitana de Brasília. Os objetivos específicos são identificar os fatores que levam ao consumo de unidades habitacionais nestes espaços e analisar as práticas espaciais de trânsito destes moradores. Mediante pesquisa bibliográfica e aplicação de questionários, observou-se que controlar o acesso ao espaço habitacional coletivo é o principal fator para o consumo destas unidades autônomas, a metrópole é vivida como uma região única e a sensação de segurança proporcionada por viver em espaço residencial fechado contrasta com a insegurança viária.In modernity, the insecurities of life in the metropolis trigger strategies of self-segregation in gated community. Thus, the general objective of this research is to investigate the spatial practices of residents of gated communities in the metropolitan area of Brasília. The specific objectives are to identify the factors that lead to the consumption of housing units in these spaces and to analyze the spatial practices of these residents. Through bibliographic research and application of questionnaires, it was observed that controlling access to collective housing space is the main factor for the consumption of these autonomous units, the metropolis is experienced as a unique region and the feeling of security provided by living in a gated community contrasts with road insecurity.En la modernidad, las inseguridades de la vida en la metrópolis desencadenan estrategias de autosegregación en barrios cerrados. El objetivo general de esta investigación es investigar las prácticas espaciales de los residentes de barrios cerrados en el área metropolitana de Brasilia. Los objetivos específicos son identificar los factores que conducen al consumo de viviendas en estos espacios y analizar las prácticas espaciales de residentes. A través de investigación bibliográfica y aplicación de cuestionarios, observó que el control de acceso al espacio de vivienda colectiva es el factor principal para el consumo de estas unidades autónomas, la metrópolis se vive como una región única y la sensación de seguridad que brinda vivir en un barrio cerrado contrasta con la inseguridad vial

Prospective on the use of bacterial cellulose as an antimicrobial edible film

Food and beverage packaging has been the target of an intensive conceptual revolution in the past twenty years, moving further away from the mere passive barriers highly dependent on petrochemical-based raw materials. The recent trends of the state of the art food packages consist of smart packages that are preferentially green manufactured due to environmental concerns, and edible, making it more practical to consume and simultaneously minimizing the resultant waste. Some of these smart packages are able to diagnose and inform “in real-time” the consumer/retailer of the encased food’s quality (intelligent packaging). Other packages are responsible for an active interaction with the food or food’s atmosphere increasing the products shelf life, improving its organoleptic and/or health properties (active packaging). The food and beverage packaging market is estimated to represent 1 trillion dollars by 2015 in the United States alone, making this field of research an interesting area to explore.The main goal of this work is to produce a novel edible packaging film with antimicrobial properties. The purpose of including a food grade antimicrobial compound is to delay the growth of microbial flora and thus increasing the food’s safety and delaying its spoilage. For the packaging main raw material we have chosen the bacterial cellulose, which may represent an interesting alternative to the classic plastic casings, since this natural biopolymer possess a high toughness (Young’s modulus of approx. 15 - 35 GPa), a low density (1.25 g cm-3), a high crystallinity (95%), it is biocompatible, is highly pure (total absence of hemicelluloses and pectin’s), provides a high surface area for modification (37 m2g-1), and finally, its low cost. As food-grade antimicrobial compound we selected the lactoferrin, a bilobar iron binding glycoprotein with a widely reported bactericidal effect. Different approaches are being used to covalently bind the protein onto bacterial cellulose. The preliminary antimicrobial effectiveness of the modified bacterial cellulose films is assessed by inhibition halo tests

Neutralidade da moeda : um debate vivo no plano real

Monografia (graduação)—Universidade de Brasília, Faculdade de Economia, Administração e Contabilidade, Departamento de Economia, 2015.Este trabalho teve como objetivo reunir trabalhos e dados que demonstrem que o debate entre a neutralidade e a não neutralidade da moeda é um tema vivo e que pode trazer sérias repercussões para as políticas econômicas contemporâneas. A ortodoxia é caracterizada por postular a neutralidade da moeda ao aceitar a Teoria Quantitativa da moeda (TQM) e a Lei de Say, observando que os impactos de ajustes monetários sobre a economia real são, caso existam, restritas ao curto prazo. A concepção da política monetária do Plano Real, que é constituída por âncora cambial, âncora monetária e, após 1999, pelo Regime de Metas de Inflação, Banco Central independente e câmbio flutuante possui, dentro de sua base teórica, a neutralidade da moeda como pressuposto, de tal forma que a política monetária está restrita a considerar somente seus efeitos sobre a variável meta: a inflação. Como para a heterodoxia a moeda não é neutra, ou seja, há um rompimento com a TQM e Lei de Say, espera-se que as políticas monetárias adotadas dentro do Plano Real gerem um efeito sobre outras variáveis, que não somente monetárias. Para isso, foi identificado o impacto das variáveis câmbio e juros ao longo dos 21 anos do plano. As variáveis como estrutura do mercado de trabalho, perfil de investimento e exportação, participação da indústria nacional no produto brasileiro, impactos de crescimento do produto potencial e deterioração dos termos de troca mostraram uma relação viva com as políticas monetárias adotadas pelo governo nas últimas duas décadas. ______________________________________________________________________ ABSTRACTThis study aimed to gather papers and data showing that the debate between neutrality and non-neutrality of money is an ongoing subject that can promote serious repercussions for contemporary economic policies. Orthodoxy is characterized by postulating money neutrality by the acceptance of the Quantitative Theory of Money (QTM) and Say’s Law, noting that the impact of monetary policies in the real economy are, if existent, restricted to the short term. The design of the monetary policy of the Plano Real, which consists of fixed exchange rate, monetary anchor and, after 1999, by the Inflation Targeting, independent central banks and a floating exchange rate, has within its theoretical basis, the neutrality of money in such a way that the monetary policy is restricted to only consider its effects on the inflation rate. As for heterodoxy the money is not neutral, i.e. there is a rupture with QTM and Say’s Law, it is expected that the monetary policies adopted within the Plano Real would generate an effect on other variables than monetary ones. By this mean, the impact of the exchange and interest rates over the 21 years of the plan was identified. The variables such as the structure of labor market, investment and export profile, national industry participation in the Brazilian product growth, impacts on the potential output and deterioration of the terms of trade showed a lively relationship with the monetary policies adopted by the government in the last two decades