Development of active bio-based multilayer systems: encapsulation of cinnamaldehyde and their physicochemical characterization

[Excerpt] In this work, different multilayer structures, using a polyhydroxybutyrate-co-valerate film with a valerate content of 8% (PHBV8) as support, were developed aiming the development of active bio-based multilayer systems. An interlayer based on zein nanofibers with and without cinnamaldehyde were electrospun in the PHBV8 film and three multilayer systems were developed: 1) without an outer layer; 2) using a PHBV8 film as outer layer; and 3) using an alginate-based film as outer layer. Their physico-chemical properties were evaluated through: water vapour and oxygen permeabilities and colour measurements, Fourier Transform Infrared Spectroscopy (FTIR) and thermal analyses. Results showed that the presence of different outer layers affected the water vapour permeability and transparency of the multilayer films. (...)

A systematic arrangement of British plants :with an easy introduction to the study of botany.

v. 1

A systematic arrangement of British plants :with an easy introduction to the study of botany.

v. 2

A systematic arrangement of British plants :with an easy introduction to the study of botany.

v. 4

Pre-clinical trials for Machado-Joseph Disease: Hypothesis-based and hypothesis-free therapeutic approaches

Tese de Doutoramento em Ciências da Saúde

Experimental validation of a proposed single-phase five-level active rectifier operating with model predictive current control

This paper presents a model predictive current control applied to a proposed single-phase five-level active rectifier (FLAR). This current control strategy uses the discrete-time nature of the active rectifier to define its state in each sampling interval. Although the switching frequency is not constant, this current control strategy allows to follow the reference with low total harmonic distortion (THDF). The implementation of the active rectifier that was used to obtain the experimental results is described in detail along the paper, presenting the circuit topology, the principle of operation, the power theory, and the current control strategy. The experimental results confirm the robustness and good performance (with low current THDF and controlled output voltage) of the proposed single-phase FLAR operating with model predictive current control.

The Botanical magazine, or, Flower-garden displayed ... /by William Curtis.

v.1-2=no.1-71 (1787-1790) [Lacks:no.27]

The Botanical magazine, or, Flower-garden displayed ... /by William Curtis.

v.11-12=no.361-432 (1797-1798)

The Botanical magazine, or, Flower-garden displayed ... /by William Curtis.

v.13-14=no.433-504 (1799-1800)

The Botanical magazine, or, Flower-garden displayed ... /by William Curtis.

v.3-4:no.73-144 (1790-1791)

The Botanical magazine, or, Flower-garden displayed ... /by William Curtis.

v.5-6=no.145-216 (1792-1793)

The Botanical magazine, or, Flower-garden displayed ... /by William Curtis.

v.7-8=no.217-288 (1794)

The Botanical magazine, or, Flower-garden displayed ... /by William Curtis.

v.9-10=no.289-360 (1795-1796)