scholarly journals Bionanocomposite Films Containing Halloysite Nanotubes and Natural Antioxidants with Enhanced Performance and Durability as Promising Materials for Cultural Heritage Protection

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1973
Author(s):  
Giulia Infurna ◽  
Giuseppe Cavallaro ◽  
Giuseppe Lazzara ◽  
Stefana Milioto ◽  
Nadka Tzankova Dintcheva
Keyword(s):  
Cultural Heritage ◽  
Natural Antioxidants ◽  
Halloysite Nanotubes ◽  
Solvent Casting ◽  
Optimum Ratio ◽  
Beneficial Effects ◽  
Naturally Occurring ◽  
Bionanocomposite Films ◽  
Solubility Of Polymers ◽  
Heritage Protection

In the last decade, the interest toward the formulation of polymer films for cultural heritage protection continuously grew, and these films must be imperatively transparent, removable, and should not react/interact with surface of the artworks. In this research, bionanocomposite films, based on chitosan (Ch) and pectin (P) and containing naturally occurring fillers and antioxidants, were formulated by solvent casting methods and were accurately characterized. The natural halloysite nanotubes (HNT) have a two-fold role, specifically, physical compatibilizer and antioxidant carrier. Therefore, the theoretical solubility between Ch and P was estimated considering Hoy’s method for solubility of polymers, while the optimum ratio between biopolymer constituents was assessed by ζ-potential measurements. The transparency, wettability, and mechanical behavior of Ch:P films, also in presence of HNT without and with antioxidants, were investigated. The beneficial effects of natural antioxidants, such as vanillic acid (VA) and quercetin (Q), on Ch:P/HNT durability were found.

scholarly journals Understanding the Effects of Crosslinking and Reinforcement Agents on the Performance and Durability of Biopolymer Films for Cultural Heritage Protection

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3468
Author(s):  
Giulia Infurna ◽  
Giuseppe Cavallaro ◽  
Giuseppe Lazzara ◽  
Stefana Milioto ◽  
Nadka Tzankova Dintcheva
Keyword(s):  
Cultural Heritage ◽  
Halloysite Nanotubes ◽  
Water Contact ◽  
Casting Technique ◽  
Photo Oxidation ◽  
Beneficial Effects ◽  
Naturally Occurring ◽  
Heritage Protection ◽  
Uvb Exposure ◽  
And Performance

In the last two decades, the naturally occurring polysaccharides, such as chitosan and pectin, have gained great attention having potential applications in different sectors, from biomedical to new generation packaging. Currently, the chitosan and pectic have been proposed as suitable materials also for the formulation of films and coatings for cultural heritage protection, as well as packaging films. Therefore, the formulation of biopolymer films, considering only naturally occurring polymers and additives, is a current challenging trend. This work reports on the formulation of chitosan (CS), pectin (PC), and chitosan:pectin (CS:PC) films, also containing natural crosslinking and reinforcement agents, such as citric acid (CA) and halloysite nanotubes (HNT), through the solvent casting technique. The produced films are characterized through water contact angle measurements, infrared and UV–visible spectroscopy and tensile test, while the durability of the CS:PC films is evaluated subjecting the film to accelerated UVB exposure and monitoring the photo-oxidation degradation in time though infrared spectroscopy. All obtained results suggest that both crosslinking and reinforcement agents have beneficial effects on the wettability, rigidity, and photo-oxidation resistance of biopolymer films. Therefore, these biopolymer films, also containing naturally occurring additives, have good properties and performance and they are suitable as coverage films for cultural heritage protection.

United States and Cultural Heritage Protection in Japan (1945–1952)

2019 ◽  
Author(s):  
Nassrine Azimi
Keyword(s):  
United States ◽  
Cultural Heritage ◽  
Heritage Protection

Cultural Heritage 'Protection of the Concept and Profiles'

2017 ◽  
Author(s):  
Chaitanya Laddha
Keyword(s):  
Cultural Heritage ◽  
Heritage Protection

scholarly journals Nanostructure, Self-Assembly, Mechanical Properties, and Antioxidant Activity of a Lupin-Derived Peptide Hydrogel

Biomedicines ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 294
Author(s):  
Raffaele Pugliese ◽  
Anna Arnoldi ◽  
Carmen Lammi
Keyword(s):  
Mechanical Properties ◽  
Antioxidant Activity ◽  
Self Assembly ◽  
Antioxidant Activities ◽  
Functional Materials ◽  
Cd Spectroscopy ◽  
Beneficial Effects ◽  
Naturally Occurring ◽  
New Research ◽  
Peptide Hydrogel

Naturally occurring food peptides are frequently used in the life sciences due to their beneficial effects through their impact on specific biochemical pathways. Furthermore, they are often leveraged for applications in areas as diverse as bioengineering, medicine, agriculture, and even fashion. However, progress toward understanding their self-assembling properties as functional materials are often hindered by their long aromatic and charged residue-enriched sequences encrypted in the parent protein sequence. In this study, we elucidate the nanostructure and the hierarchical self-assembly propensity of a lupin-derived peptide which belongs to the α-conglutin (11S globulin, legumin-like protein), with a straightforward N-terminal biotinylated oligoglycine tag-based methodology for controlling the nanostructures, biomechanics, and biological features. Extensive characterization was performed via Circular Dichroism (CD) spectroscopy, Fourier Transform Infrared spectroscopy (FT-IR), rheological measurements, and Atomic Force Microscopy (AFM) analyses. By using the biotin tag, we obtained a thixotropic lupin-derived peptide hydrogel (named BT13) with tunable mechanical properties (from 2 to 11 kPa), without impairing its spontaneous formation of β-sheet secondary structures. Lastly, we demonstrated that this hydrogel has antioxidant activity. Altogether, our findings address multiple challenges associated with the development of naturally occurring food peptide-based hydrogels, offering a new tool to both fine tune the mechanical properties and tailor the antioxidant activities, providing new research directions across food chemistry, biochemistry, and bioengineering.

scholarly journals The Influence of Interpretation through Guiding Tour, Quality of Reception and Relics’ Worship on the Satisfaction of Pilgrims Attending the Iasi Feast

2021 ◽  
Vol 13 (12) ◽  
pp. 6905
Author(s):  
Maria Tătărușanu ◽  
Gina Ionela Butnaru ◽  
Valentin Niță ◽  
Angelica-Nicoleta Neculăesei ◽  
Elena Ciortescu
Keyword(s):  
Cultural Heritage ◽  
Cultural Tourism ◽  
Heritage Preservation ◽  
Beneficial Effects ◽  
Religious Tourism ◽  
Guided Tours ◽  
The Relationship ◽  
Heritage Interpretation ◽  
Cultural Heritage Preservation

Recently, in line with the increased attention paid to cultural tourism in general and to religious tourism in particular, researchers and practitioners have become increasingly interested in the analysis of various aspects related to cultural heritage in order to capitalize on its value by means of its interpretation, thus providing beneficial effects both for tourists and for tourism’s sustainable development. The aim of this research is to analyze the extent to which the methods of interpretation of the religious cultural heritage: guiding tours, quality reception, and relic worship influence the satisfaction of tourists participating in the “Saint Parascheva” pilgrimage, held annually by the Metropolitan Cathedral in Iasi. The data were collected by means of a survey (N = 932) and the information was processed by using the SPSS version 25 program. Our results indicate the significant influence that the potential to worship relics has on pilgrims’ satisfaction compared to other interpretation methods, such as the relationship with the Cathedral’s staff or the possibility of participating in guided tours. Pilgrims’ satisfaction is also perceived differently depending on certain aspects of their socio-demographic profile, i.e., their age and the perceived faith level. This study is relevant for researchers, managers, and students interested in the field of cultural heritage interpretation in genera, and in the field of religious heritage in particular, and could significantly contribute to improving pilgrims’ satisfaction as well as cultural heritage preservation.

Nano-TiO2 coatings for cultural heritage protection: The role of the binder on hydrophobic and self-cleaning efficacy

2016 ◽  
Vol 91 ◽  
pp. 1-8 ◽  
Author(s):  
Mauro F. La Russa ◽  
Natalia Rovella ◽  
Monica Alvarez de Buergo ◽  
Cristina M. Belfiore ◽  
Antonino Pezzino ◽  
...  
Keyword(s):  
Cultural Heritage ◽  
Nano Tio2 ◽  
Heritage Protection ◽  
Self Cleaning ◽  
Tio2 Coatings ◽  
Cleaning Efficacy

scholarly journals Changes of Naturally Occurring CD4+CD25+ FOXP3+ Regulatory T Cells in Patients With Acute Coronary Syndrome and the Beneficial Effects of Atorvastatin Treatment

2015 ◽  
Vol 56 (2) ◽  
pp. 163-169 ◽  
Author(s):  
Zhi Xiao Wang ◽  
Chong Quan Wang ◽  
Xiao Yan Li ◽  
Yan Ding ◽  
Gao Ke Feng ◽  
...  
Keyword(s):  
T Cells ◽  
Acute Coronary Syndrome ◽  
Regulatory T Cells ◽  
Atorvastatin Treatment ◽  
Beneficial Effects ◽  
Coronary Syndrome ◽  
Naturally Occurring
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