58 documents found, page 1 of 6

Metal-ion zeolites obtained by chemical and mechanochemical methods as Fenton-l...

One of the critical steps for the development and health applications of inorganic nanoparticles is to exhibit high efficiency without inducing toxicity. In this work, metal-ion zeolites were developed to be used as Fenton-like catalysts for health applications. ZSM-5 and BEA zeolites were modified through chemical and mechanochemical methods to obtain nanomaterials with tuned particle size and texture. Charact...

Iron-peptide complexes from spent yeast: evaluation of iron absorption using ca...

Iron complexation using spent yeast peptides for human supplementation

Peptide-rich extracts from spent yeast waste streams as a source of bioactive c...

Peptide-rich extracts from spent yeast waste streams as a source of bioactive c...

The growing brewing industry1 generates increasing amounts of spent yeast from its fermentation processes. To apply a circular economy concept, spent yeast can be used to produce ingredients from yeast cell wall such as β-glucans and mannans2 whereas the remaining fractions are further processed to recover proteins and peptides. The high protein content of spent yeast (about 45-60%), including essential amino a...

Biomass-derived nanoporous carbons as electrocatalysts for oxygen reduction rea...

Electrocatalysts (ECs) for the oxygen reduction reaction (ORR) are crucial in fuel cells and for this reason developing cost-effective metal-free ECs with high electrocatalytic activity and high-volume production remains a huge challenge. Herein, we report the application as ORR electrocatalysts of a series of high grade nanoporous carbons, prepared by chemical activation of acid-chars obtained from the H2SO4 d...

Artists connection between recycling and environmental education

The artistic production can play a role of reflection and alert to the recovery of waste and end-of-life materials, with the consequent circular economy implementation, minimizing the use of new natural resources. The competition “Reciclar é uma arte” was organized in the framework of a partnership between an academic institution - Instituto Politécnico do Porto (IPP)/Instituto Superior de Engenharia do Porto (...

Can data collected in the Citizen Science project EduMar be used to monitor coa...

In a climate change scenario, it is important to aware society for the need to protect marine species biodiversity and to ensure its sustainability. Therefore, the project EduMar/EduSea (Educate for the Sea) is being developed in Portugal aiming to educate students (elementary and middle school) for the preservation of the sea and its resources through citizen science. More than 300 students are participating i...

Single Low-Dose Ionizing Radiation Induces Genotoxicity in Adult Zebrafish and ...

This study investigated to what extent a single exposure to low doses of ionizing radiation can induce genotoxic damage in irradiated adult zebrafish (Danio rerio) and its non-irradiated F1 progeny. Four groups of adult zebrafish were irradiated with a single dose of X-rays at 0 (control), 100, 500 and 1000 mGy, respectively, and couples of each group were allowed to reproduce following irradiation. Blood of pa...

Alteração superficial e pedogeomorfologia no sul do Complexo Bação – Quadriláte...

Alguns aspectos dos processos de alteração superficial e seus reflexos na pedogeomorfologia Quaternária na sub-bacia do alto Ribeirão Maracujá, no Complexo Bação, Quadrilátero Ferrífero, MG, são aqui caracterizados. São investigados caracteres relativos à dinâmica evolutiva de três vertentes (toposseqüências 1, 2 e 3), situadas sobre gnaisses, mas com graus de erodibilidade diferenciados. Nos segmentos de alta ...