Search results for "D2"
showing 10 items of 2418 documents
Bionanocomposite films containing halloysite nanotubes and natural antioxidants with enhanced performance and durability as promising materials for c…
2020
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&rsquo
Identification of Abies sibirica L. Polyprenols and Characterisation of Polyprenol-Containing Liposomes
2020
The needles of conifer trees are one of the richest sources of natural polyprenols. Polyprenol homologs from Abies sibirica L. lipophilic 80% purified extract were analyzed and quantified. In total, 10 peaks (Prenol-11 to Prenol-20) were observed in the ultra-high-performance liquid chromatography&ndash
Phytochemical Evaluation of Tinctures and Essential Oil Obtained from Satureja montana Herb
2020
Winter Savory (Satureja montana L.) has been used in traditional medicine and as a spice or natural food preservative in the Mediterranean region for centuries. In this paper, some technological and analytical aspects of the S. montana tinctures development and an evaluation of the essential oil composition are provided. The total phenolic and flavonoid contents and phenolic compounds profile analyzed spectrophotometrically and by high-performance thin-layer chromatography (HPTLC), respectively, were evaluated in the developed tinctures. The results showed that the tinctures prepared from the S. montana herb by maceration or remaceration are rich in polyphenols, and there is an influence of…
Biomaterial-Assisted Anastomotic Healing: Serosal Adhesion of Pectin Films
2021
Anastomotic leakage is a frequent complication of intestinal surgery and a major source of surgical morbidity. The timing of anastomotic failures suggests that leaks are the result of inadequate mechanical support during the vulnerable phase of wound healing. To identify a biomaterial with physical and mechanical properties appropriate for assisted anastomotic healing, we studied the adhesive properties of the plant-derived structural heteropolysaccharide called pectin. Specifically, we examined high methoxyl citrus pectin films at water contents between 17–24% for their adhesivity to ex vivo porcine small bowel serosa. In assays of tensile adhesion strength, pectin demonstrated significant…
Imagen, lugar de memoria y mito. En torno al Alcázar de Toledo
2009
El presente texto analiza la función de la producción de imágenes (fotográficas, pictóricas, cinematográficas, arquitectónicas) en la mitología franquista que se refiere a la guerra civil. El Alcázar de Toledo fue un escenario emblemático de la guerra, un lugar de memoria por su resistencia, pero también un edificio aureolado de historia. A través del estudio del tratamiento arquitectónico que se dio al edificio (mantenimiento de las ruinas, restauración...), así como de su vida ceremonial, es posible analizar la visión épica que alimentó la memoria franquista y la relación entre el pasado imaginado y el presente.This paper analyzes the role of the images in the Francoist mythology concerni…
Younger is better? Isolation and phenotypical characterization of mesenchymal stem cells from the Wharton's jelly of pre-term human umbilical cords
2014
L’oppidum arverne de Gondole (Le Cendre, Puy-de-Dôme).Topographie de l’occupation protohistorique (La Tène D2) et fouille du quartier artisanal : un …
2009
Of the three arverni oppida situated in the southern part of the Clermont-Ferrand basin, Gondole isthe least known to the general public and to the scientific communities. Unlike her sister sites, Corentand Gergovie, detailed surveys of Gondole have only recently begun, mainly because Gondole lay undiscovered until the early 1990’s. The rescue archaeology trial trenching carried out between 2002 and 2005 led to the discovery of thefamous horses and human burial, and marked the beginning of the archaeological research aroundthis site. An open-area excavation conducted outside the Late Iron Age fortification has permittedpartial examination of the defenses (ditch) and detailed analysis of an …
Determination of 60 Migrant Substances in Plastic Food Contact Materials by Vortex-Assisted Liquid-Liquid Extraction and GC-Q-Orbitrap HRMS
2021
A GC-HRMS analytical method for the determination of 60 migrant substances, including aldehydes, ketones, phthalates and other plasticizers, phenol derivatives, acrylates, and methacrylates, in plastic food contact materials (FCM) has been developed and validated. The proposed method includes migration tests, according to Commission Regulation (EU) 10/2011, using four food simulants (A, B, C, and D1), followed by vortex-assisted liquid–liquid extraction (VA-LLE) and GC-Q-Orbitrap HRMS analysis in selected ion monitoring (SIM) mode, with a resolving power of 30,000 FWHM and a mass accuracy ≤5 ppm. The method was validated, showing satisfactory linearity (R2 ≥ 0.98 from 40 to 400 …
El fracaso de los proyectos de reforma en el virreinato peruano de principios del siglo XVIII. Las propuestas de Carmine Nicola Caracciolo, príncipe …
2021
Desde hace algunas décadas, una nueva corriente historiográfica ha dirigido su atención a las transformaciones que, en los ámbitos social, político y militar, impulsó el gobierno borbónico en las primeras décadas del siglo XVIII. Aunque en gran medida no tuvieron éxito, las reformas promovidas en las dos primeras décadas entre la Península Ibérica, Sicilia, Nueva España y Perú ponen de relieve un importante primer intento de hacer más funcional el gobierno de la Monarquía. Este artículo tiene como objetivo analizar las propuestas de las reformas que Carmine Nicola Caracciolo elaboró durante su mandato como Virrey del Perú (1716-1721). En particular, se reflexionará sobre aquellas propuestas…
«Viva el señor San Antonio, pues que tanto nos ampara»: los santos y su representación en la literatura popular de los siglos XVIII y XIX
2016
En la Edad Moderna la religión impregnaba la vida cotidiana, y los santos eran personajes comunes a los que recurrir en caso de necesidad. Las hagiografías, desde el ámbito oficial, difundían la fama de estas figuras, pero también había una notable circulación oral y escrita de literatura popular religiosa (sobre todo pliegos de cordel y gozos) que los daba a conocer en todos los ámbitos sociales. Primero, esbozaremos las características generales de la santidad en la literatura popular valenciana del XVIII, y después nos centraremos en el caso de la Beata Inés de Benigànim, de devoción local y prolongada en el tiempo (siglos XVII a XX). A través de estos textos podremos comprender la conce…