11 documents found, page 1 of 2

Upcycling fishing net waste and metal oxide from electroplating waste into alga...

Plastic waste, especially discarded fishing nets, and electroplating sludges pose significant environmental challenges, impacting marine ecosystems and contributing to pollution. In alga cultivation, invasive microorganisms often hinder growth, necessitating strategies to combat these issues. This study aimed to develop recycled substrates for alga cultivation by repurposing fishing nets and enhancing their sur...

Halochromic inks applied on cardboard for food spoilage monitorization

Control of food spoilage is a critical concern in the current world scenario, not only to ensure the quality and safety of food but also to avoid the generation of food waste. This paper evaluates a dual-sensor strategy using six different pH indicators stamped on cardboard for the detection of spoilage in three different foods: beef, salmon, and strawberries. After function validation and formulation optimizat...

Soybean Oil Transesterification for Biodiesel Production with Micro-Structured ...

In this study, micro-structured calcium oxide obtained from the calcination (850 C for 3 h) of Gallus gallus domesticus (chicken) eggshells was used as a catalyst in the transesterification of soybean oil. This catalyst was characterized by Scanning Electron Spectroscopy (SEM) methods. The structure of the obtained CaO showed several agglomerates of white granular solids with a non-regular and unsymmetrical sha...

Biodegradability index determination of thermoplastic composites reinforced wit...

The present work intends to study the biodegradability indexes of a thermoplastic composites composed by polylactic acid (PLA) and kraft paper. The produced samples were placed in an aqueous environment under aerobic conditions according to ISO-14851, in order to determine the biodegradability index of the PLA-kraft composites.

Conception and characterization of different properties from a composite thermo...

This works aims to study the influence of relevant hot compressi on moulding parameters on the impregnation of cellulosic fibres by a thermoplastic polymeric m atrix. The mechanical proprieties of Kraft/PMMA composites plates will be determined and used for the compression moulding process window determination. The thermoforming capabilities of the produced composites will be assessed by studying the curvature ...

Recovery of mineral dust in composite materials

This work evaluates the potential of use of mineral dust waste from stone extraction and processing industries to develop composite materials to construction sector. Actually, a high volume of mineral waste was generated, in a stone extraction and processing industries, without any type of recycling and recovery. In this work, this waste was combined with a biopolymeric material, with different mass ratios, nam...

First approach to the chronological sequence of the engraved stone plaques of t...

Illustrating the Sabor Valley (Trás-os-Montes, Portugal): rock art and its long...

Placas móveis com grafismos rupestres paleolíticos do Terraço do Medal (Nordest...

Terrasse de Foz do Medal, habitat de plein air paléolithique avec art mobilier