Turismo acessível para todos, um paradigma emergente e um desafio para a oferta turística. O caso dos espaços museológicos e empreendimentos turísticos de Cascais.

Reflexão sobre o turismo acessível para todos, como modelo que se revela cada vez mais essencial para todo o sistema turístico, que se afirma não só pela sua relevância social, cívica e demográfica mas também pelas potencialidades económicas associadas. Todavia, o turismo acessível constitui um desafio de adaptação para a oferta turística instalada há vários anos, em destinos turísticos mais antigos, como é o caso de Cascais.Reflection on accessible tourism for all, as an increasingly essential model for the touristic system, that claims not only for its social, civic and demographic significance, but also for the economic potential associated. However, the accessible tourism is an adaptation challenge for the elderly tourism supply, at long-established tourism destinations, such as Cascais

Exciton Coupling Analysis and Enolization Monitoring by Vibrational Circular Dichroism Spectra of Camphor Diketones

The keto–enol tautomerization of (1<i>R</i>,3<i>R</i>,4<i>R</i>)-(+)-3-benzoylcamphor in solution was traced by the infrared (IR) and vibrational circular dichroism (VCD) spectra, reflecting the Boltzmann populations of the isomers. To investigate the exciton coupling of the carbonyl vibrations in the region 1800–1600 cm^–1, VCD spectra of a series of camphor derived β-diketones were analyzed with the support of density functional theory (DFT) calculations. The results confirm the importance of the exciton chirality for VCD and manifest that the VCD spectroscopy is a convenient technique to investigate the keto–enol tautomerization equilibria in chiral diketones

Design and Fabrication of a Renewable and Highly Transparent Multilayer Coating on Poly(lactic acid) Film Capable of UV-Shielding and Antifogging

A new and highly transparent multilayer coating on poly­(lactic acid) (PLA) film has been designed and constructed based on the layer-by-layer assembly of green and renewable hydroxypropyl methylcellulose (HPMC) and tannic acid (TA). The surface chemical structure, thickness, and morphology analyses of the multilayer coating confirm that HPMC and TA are successfully incorporated based on the hydrogen-bonding interaction. The resultant coated PLA film presents excellent UV-shielding and antifogging properties, which shows strong dependency on the number of assembly cycles. Although the tensile mechanical property of coated PLA film shows a decrease, the thermal property of the PLA substrate remained. This work provides a simple but effective pathway to design and fabricate highly transparent and environmentally friendly coating for the UV-shielding and antifogging applications

Design and Fabrication of a Renewable and Highly Transparent Multilayer Coating on Poly(lactic acid) Film Capable of UV-Shielding and Antifogging

A new and highly transparent multilayer coating on poly­(lactic acid) (PLA) film has been designed and constructed based on the layer-by-layer assembly of green and renewable hydroxypropyl methylcellulose (HPMC) and tannic acid (TA). The surface chemical structure, thickness, and morphology analyses of the multilayer coating confirm that HPMC and TA are successfully incorporated based on the hydrogen-bonding interaction. The resultant coated PLA film presents excellent UV-shielding and antifogging properties, which shows strong dependency on the number of assembly cycles. Although the tensile mechanical property of coated PLA film shows a decrease, the thermal property of the PLA substrate remained. This work provides a simple but effective pathway to design and fabricate highly transparent and environmentally friendly coating for the UV-shielding and antifogging applications

Design and Fabrication of a Renewable and Highly Transparent Multilayer Coating on Poly(lactic acid) Film Capable of UV-Shielding and Antifogging

A new and highly transparent multilayer coating on poly­(lactic acid) (PLA) film has been designed and constructed based on the layer-by-layer assembly of green and renewable hydroxypropyl methylcellulose (HPMC) and tannic acid (TA). The surface chemical structure, thickness, and morphology analyses of the multilayer coating confirm that HPMC and TA are successfully incorporated based on the hydrogen-bonding interaction. The resultant coated PLA film presents excellent UV-shielding and antifogging properties, which shows strong dependency on the number of assembly cycles. Although the tensile mechanical property of coated PLA film shows a decrease, the thermal property of the PLA substrate remained. This work provides a simple but effective pathway to design and fabricate highly transparent and environmentally friendly coating for the UV-shielding and antifogging applications

Doped Perovskites To Evaluate the Relationship between Fuel–Oxidizer Thermite Ignition and Bond Energy, Electronegativity, and Oxygen Vacancy

Despite our knowledge of the existence of the violent thermite reaction for over 100 years, it is still not yet understood how the properties of a metal oxide oxidizer relate to and influence the ignition temperature. To address this shortcoming, we prepared a series of perovskite-based oxidizers which enable a systematic investigation of how materials properties of the oxidizer relate to the ignition temperature. In this paper, nine lanthanum-based perovskites with different Sr²⁺ doping of the A-site and different B-site transition metals were synthesized. The perovskite O₂ release and ignition temperatures with aluminum were measured by fast heating (>10⁵ K/s) temperature-jump/time-of-flight mass spectrometry coupled with high-speed imaging. These results were then correlated with the average bond energy and overall metal–oxygen electronegativity difference. Remarkably, we found a linear relationship between average bond energy and electronegativity with ignition temperature. To our knowledge this is the first demonstration of the connection between metal–oxygen bond energy, electronegativity, and ignition temperature

The antibacterial activity of both compounds against S. aureus.

<p>A, Effect of TSDB and DATS on cell growth; B, Effect of TSDB and DATS on Conductivity; C, Effect of TSDB and DATS on protein leakage; D, Effect of TSDB and DATS on Alkaline phosphatase.</p

Visualization 2: Dual-soliton Stokes-based background-free coherent anti-Stokes Raman scattering spectroscopy and microscopy

The evolution of the generated pulse as the input polarization is rotated. Originally published in Optics Letters on 01 June 2016 (ol-41-11-2628

Identification of Lanthanide(III) Luminophores in Magnetic Circularly Polarized Luminescence Using Raman Optical Activity Instrumentation

Luminescence of lanthanide­(III) ions sensitively reflects atomic environment. However, the signal may be weak and covered by Raman scattering. In the present study magnetic circularly polarized luminescence (MCPL) is explored as a more sensitive tool to recognize the lanthanide signal and assign underlying electronic transitions. MCPL spectra of the Na₃[Ln­(DPA)₃] (Ln = Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, and Er) complexes were recorded on a Raman optical activity (ROA) instrument. The ROA spectrometer equipped with the 532 nm laser excitation sensitively detects differences in scattering of left- and right-circularly polarized light caused by the magnetic field. Weak bands sometimes invisible in unpolarized measurement could be detected as MCPL. Observed transitions were assigned with the aid of the ligand-field theory. MCPL also reflects the environment: chloride and nitrate salts (LnCl₃ and Ln­(NO₃)₃) provide a different signal than the complex; for Nd^III the signal responds to distribution of chloride and nitrate ions around the metal. The MCPL technique thus appears useful for identification and assignment of lanthanide transitions and increases the potential of fluorescent probes for applications in analytical chemistry and imaging

Antibacterial Effect of (2E,2E)-4,4-Trisulfanediylbis(but-2-enoic acid) against <i>Staphylococcus aureus</i>

<div><p>A new highly active molecule, (2E, 2E)-4,4-trisulfanediylbis(but-2-enoic acid) (TSDB), was designed and synthesized through comparative molecular field analysis with the diallyl trisulfide structure of garlic. TSDB exerted a strong inhibitory effect against <i>Staphylococcus aureus</i>, with minimal inhibitory and minimal bactericidal concentrations of 16 and 128 μg/mL, respectively. TSDB destructed the integrity of the <i>S</i>. <i>aureus</i> cell membrane but weakly damaged the bacterial cell wall. TSDB also increased the conductivity and protein expression in microbial broth but minimally influenced the level of extracellular alkaline phosphatase. TSDB could be a novel food preservative.</p></div