5 documents found, page 1 of 1
First stage of the development of an eco-friendly detergent formulation for eff...
Fernandes, Andreia P. M.; Ferreira, Ana M.; Sebastião, Marco; Santos, Ricardo; Neves, Catarina M. S. S.; Coutinho, João A. P.Detergent formulations for cleaning a carbonized soil-degreasers-typically comprise surfactants, organic solvents, phosphate-based cleaning agents, and alkaline agents, which results in high pH values (>11) that raise human and environmental risks. It is important to develop eco-friendly and safer degreasers, while maintaining their cleaning efficiency. In this work, simple degreaser formulations, with a pH bel...
Using aqueous solutions of ionic liquids as chlorophyll eluents in solid-phase ...
Vaz, Bárbara M. C.; Martins, Margarida; de Souza Mesquita, Leonardo M.; Neves, Márcia C.; Fernandes, Andreia P. M.; Pinto, Diana C. G. A.There is a need for handy and fast techniques to purify biomolecules, increasing their stability and value, because the separation units are current bottlenecks in downstream processes. Solid-phase extraction is a technique that enables the purification of a compound by its adsorption from a liquid matrix. The AmberLite™ HPR900 OH resin allows the separation of chlorophylls from complex extracts, however the re...
Are cyanobacteria a nearly immortal source of high market value compounds?
Macário, Inês P. E.; Veloso, Telma; Fernandes, Andreia P. M.; Martins, Margarida; Frankenbach, Silja; Serôdio, João; Gonçalves, Fernando J. M.BACKGROUND: When the human population increases, so does the need to explore a wider range of feedstocks and biomasses, such as cyanobacteria. However, a deeper understanding of the growth patterns and pigment production is required to support the selection of the most beneficial species and conditions for industrial production. The growth and pigment production (i.e., chlorophyll a and C-phycocyanin) of three ...
Extraction of chlorophyll from wild and farmed Ulva spp. using aqueous solution...
Martins, Margarida; Fernandes, Andreia P. M.; Torres-Acosta, Mario A.; Collén, Pi Nyvall; Abreu, Maria H.; Ventura, Sónia P. M.Products extracted from natural resources are an increasing trend in several fields promoted by consumer demand. Allied to the importance attached to the concept of “natural product” should be the way the “natural product” is obtained. In this work, chlorophyll was extracted from batches of wild-harvested and farm-raised green macroalgae Ulva spp. from two different European locations, Portugal and France. The ...
Using ionic liquids to tune the performance of aqueous biphasic systems based o...
Silva, Francisca A. e; Carmo, Rui M. C.; Fernandes, Andreia P. M.; Kholany, Mariam; Coutinho, João A. P.; Ventura, Sónia P. M.Aqueous biphasic systems (ABS) based on Pluronic L-35, a (EO)x-(PO)y-(EO)x triblock copolymer, were determined and applied in the separation of two structurally similar flavonoids (naringin and rutin). Two sets of phase formers were paired with Pluronic L-35, one comprising conventional salts/buffer and other including cholinium-based ionic liquids (ILs). It is shown that while the conventional salts induce an ...