Microbial exopolysaccharides (EPS) are an abundant and important group of compounds that can be secreted by bacteria, fungi and algae. The biotechnological production of these substances represents a ...faster alternative when compared to chemical and plant-derived production with the possibility of using industrial wastes as substrates, a feasible strategy after a comprehensive study of factors that may affect the synthesis by the chosen microorganism and desirable final product. Another possible difficulty could be the extraction and purification methods, a crucial part of the production of microbial polysaccharides, since different methods should be adopted. In this sense, this review aims to present the biotechnological production of microbial exopolysaccharides, exploring the production steps, optimization processes and current applications of these relevant bioproducts.
Biotechnology is responsible for the manipulation of living organisms or their components for the production of products that are of benefit to human kind. Due to the wide range of applications, ...colors have been used to differentiate the main areas of research, such as white (industrial), green (agricultural) and blue (marine and fresh-water), among others. Thus, this review outlines the impacts of these areas of biotechnology, emphasizing their impact and potential to replace carbon-based technologies with more sustainable technologies.
Agro-industrial residues and by-products are a crescent environmental problem since they are often discarded without proper treatment, and still have growing production. These residues are rich from ...a nutritional point of view and contain various industrial relevant compounds, such as phenolic compounds, fibers, vitamins, sugars and others. The crescent worrying about environmental issues has led researchers and industries to focus on “eco-friendly” solutions for everyday problems. In this sense, the use of enzymes for the valorization of agro-industrial residues is a safe and green alternative technology. Hence, this review aims to show the enzyme potential for the use and valorization of several agro-industrial residues, focusing on the most produced residues worldwide, such as fruits, grains and lignocellulosic residues, as well as a brief explanation of microbial enzymes, its production and optimization, altogether with tools to identify producing microorganisms.
Products that bear the label “natural” have gained more attention in the marketplace. In this approach, the production of aroma compounds through biotransformation or bioconversion has been receiving ...more incentives in economic and research fields. Among the substrates used in these processes, terpenes can be highlighted for their versatility and low cost; some examples are limonene, α-pinene, and β-pinene. This work focused on the biotransformation of the two bicyclic monoterpenes, α-pinene and β-pinene; the use of different biocatalysts; the products obtained; and the conditions employed in the process.
Nowadays, food, cosmetic, environmental and pharmaceutical fields are searching for alternative processes to obtain their major products in a more sustainable way. This fact is related to the ...increasing demand from the consumer market for natural products to substitute synthetic additives. Industrial biotechnology appears as a promising area for this purpose; however, the success of its application is highly dependent of the availability of a suitable microorganism. To overcome this drawback, the isolation of microorganisms from diverse sources, including fermented food, adverse environments, contaminated samples or agro-industrial wastes is an important approach that can provide a more adaptable strain able to be used as biocatalyst and that exhibit resistance to industrial conditions and high yields/productivities in biotechnological production of natural compounds. The aim of this review is to provide a solid set of information on the state of the art of isolation and screening studies for obtaining novel biocatalysts able to produce natural compounds, focusing in aromas, biosurfactants, polysaccharides and microbial oils.
Green synthesis is one of the most valuable and emerging methods for the synthesis of nanoparticles (NPs) nowadays, presenting imperative biological benefits, reduced process time, ...cost-effectiveness, and environmental benefits, as an alternative to physical and chemical processes. Silver, a noble metal, possess unique properties and potential applications in medicine, requiring the search for novel and suitable tools for its production due to the growing demand. The exploration of plants diversity can be used towards rapid and single-step preparatory methods for various NPs, maintaining the green principle over conventional ones, an important aspect for medical applications. Plants contain bio-organics components, which usually play multiple roles as reducing, capping as well as stabilizing agents for metal compounds into silver nanoparticles (AgNPs). The stability of these NPs is governed by certain parameters, which influence stability and bioavailability. In this perspective, this review aims to provide a comprehensive view to understand the possible induced mechanism, current scenario and future prospects for the bio-inspired synthesis of AgNPs.
Products that bear the label "natural" have gained more attention in the marketplace. In this approach, the production of aroma compounds through biotransformation or bioconversion has been receiving ...more incentives in economic and research fields. Among the substrates used in these processes, terpenes can be highlighted for their versatility and low cost; some examples are limonene, alpha-pinene, and beta-pinene. This work focused on the biotransformation of the two bicyclic monoterpenes, alpha-pinene and beta-pinene; the use of different biocatalysts; the products obtained; and the conditions employed in the process.
The objective of this study was to evaluate the viscosity, zeta potential and soluble and total solids of the emulsion and microparticles of oregano essential oil (Origanum vulgare) using gum arabic ...as a coating agent and to analyze the morphology of the microparticles produced by the spray drying method. The rheological analysis showed a viscosity for emulsion of 36.23 ± 0.59 mPas and for microparticles of 20.13 ± 0.15 mPa.s. The zeta potential of the emulsion was - 6.67 ± 0.32 mV and of the oregano oil microparticles -16.47 ± 0.70 mV. Soluble solids showed Brix° of 8.44 ± 0.13 and 0.98 ± 0.36 and total solids 8.95 ± 0.42 and 1.03 ± 0.02 % for emulsion and microparticles, respectively. The morphology of the microparticles presented irregular spherical shapes and agglomeration.
PDF
