Search results for "44"

Chemical Composition Analysis, Antimicrobial Activity and Cytotoxicity Screening of Moss Extracts (Moss Phytochemistry)

2015

Mosses have been neglected as a study subject for a long time. Recent research shows that mosses contain remarkable and unique substances with high biological activity. The aim of this study, accordingly, was to analyze the composition of mosses and to screen their antimicrobial and anticancer activity. The total concentration of polyphenols and carbohydrates, the amount of dry residue and the radical scavenging activity were determined for a preliminary evaluation of the chemical composition of moss extracts. In order to analyze and identify the substances present in mosses, two types of extrahents (chloroform, ethanol) and the GC/MS and LC-TOF-MS methods were used. The antimicrobial activ…

Villancicos, que se han de cantar en los Maytines de los Reyes, en la Santa Iglesia Metropolitana Cesar-Augustana, en su Santo, Angelico, y Apostolic…

Grav. xil. del Pilar Banda Sign.: [ ]4 Text a dues col. separades per filet Reclams

Phytotoxic Activities of Mediterranean Essential Oils

2010

Made available in DSpace on 2013-08-28T14:12:36Z (GMT). No. of bitstreams: 1 WOS000279207300035.pdf: 281167 bytes, checksum: fc72a9258845b6d806e3ebbaf2617e52 (MD5) Made available in DSpace on 2013-09-30T18:36:30Z (GMT). No. of bitstreams: 2 WOS000279207300035.pdf: 281167 bytes, checksum: fc72a9258845b6d806e3ebbaf2617e52 (MD5) WOS000279207300035.pdf.txt: 48896 bytes, checksum: d8cd11d4997d3f23c1211486475739e1 (MD5) Previous issue date: 2010-06-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:48:46Z No. of bitstreams: 2 WOS000279207300035.pdf: 281167 bytes, checksum: fc72a9258845b6d806e3ebbaf2617e52 (MD5) WOS000279207300035.pdf.txt: 48896 bytes, ch…

Velázquez en el entorno de Pacheco: las primeras obras

1991

A PESAR DE LA ABUNDANTE BIBLIOGRAFIA SOBRE VELAZQUEZ, LAS OBRAS DE SU PRIMER PERIODO HAN SIDO POCO ESTUDIADAS. EN ESTA ETAPA VELAZQUEÑA ES MUY IMPORTANTE LA INFLUENCIA DE SU SUEGRO FRANCISCO PACHECO. TENIENDO EN CUENTA EL AMBIENTE CULTURAL Y RELIGIOSO EN QUE SE PRODUJERON OBRAS COMO "VIEJA FRIENDO HUEVOS" O "CRISTO EN CASA DE MARTA Y MARIA" PUEDEN INTERPRETARSE RESPECTIVAMENTE COMO UNA ALEGORIA DEL MATRIMONIO Y COMO UNA ALUSION A LA VIRGEN MARIA COMO MODELO DE VIDA ACTIVA Y CONTEMPLATIVA. ESTAS INTERPRETACIONES TIENEN EN CUENTA FUNDAMENTALMENTE LAS FUENTES LITERARIAS MANEJADAS POR EL SUEGRO DEL PINTOR, FRANCISCO PACHECO, QUE VELAZQUEZ MUY PROBABLEMENTE CONOCIERA. (A.B.C./ L.A.G.)

Triterpenoid saponins from the cultivar “Green Elf” of Pittosporum tenuifolium

2021

Four oleanane-type glycosides were isolated from a horticultural cultivar “Green Elf” of the endemic Pittosporum tenuifolium (Pittosporaceae) from New Zealand: three acylated barringtogenol C glycosides from the leaves, with two previously undescribed 3-O-β-d-glucopyranosyl-(1→2)-[α-l-arabinopyranosyl-(1→3)]-β-d-glucuronopyranosyl-21-O-angeloyl-28-O-acetylbarringtogenol C, 3-O-β-d-galactopyranosyl-(1→2)-[α-l-arabinopyranosyl-(1→3)]-β-d-glucuronopyranosyl-21-O-angeloyl-28-O-acetylbarringtogenol C, and the known 3-O-β-d-glucopyranosyl-(1→2)-[α-l-arabinopyranosyl-(1→3)]-β-d-glucuronopyranosyl-21-O-angeloyl-28-O-acetylbarringtogenol C (Eryngioside L). From the roots, the known 3-O-β-d-glucopyra…

The Application of Active Biomonitoring with the Use of Mosses to Identify Polycyclic Aromatic Hydrocarbons in an Atmospheric Aerosol

2021

The use of biological indicators of environmental quality is an alternative method of monitoring ecosystem pollution. Various groups of contaminants, including organic ones, can be measured in environmental samples. Polycyclic aromatic hydrocarbons (PAHs) have not yet been determined by the moss bag technique. This technique uses several moss species simultaneously in urban areas to select the best biomonitoring of these compounds, which are dangerous to humans and the environment. In this research, a gas chromatography coupled with mass spectrometry was used for the determination of selected PAHs in three species of mosses: Pleurozium schreberi, Sphagnum fallax and Dicranum polysetum (acti…

Durability of Basalt/Hemp Hybrid Thermoplastic Composites

2019

The Achilles heel of thermoplastic natural fibre composites is their limited durability. The environmental degradation of the mechanical properties of hemp and hemp/basalt hybrid-reinforced high-density polyethylene (HDPE) composites has been investigated with a special focus on the effects of water ageing and accelerated ageing, including hygrothermal and UV radiation. Modification of the matrix was carried out using a maleic anhydride high-density polyethylene copolymer (MAPE) as a compatibilizer. Hybridization of hemp fibres with basalt fibres and the incorporation of MAPE were found to significantly decrease the water uptake (up to 75%) and increase the retention of mechanical propertie…

Multi-Alkenylsilsesquioxanes as Comonomers and Active Species Modifiers of Metallocene Catalyst in Copolymerization with Ethylene.

2018

The copolymers of ethylene (E) with open-caged iso-butyl-substituted tri-alkenyl-silsesquioxanes (POSS-6-3 and POSS-10-3) and phenyl-substituted tetra-alkenyl-silsesquioxane (POSS-10-4) were synthesized by copolymerization over the ansa-metallocene catalyst. The influence of the kind of silsesquioxane and of the copolymerization conditions on the reaction performance and on the properties of the copolymers was studied. In the case of copolymerization of E/POSS-6-3, the positive comonomer effect was observed, which was associated with the influence of POSS-6-3 on transformation of the bimetallic ion pair to the active catalytic species. Functionality of silsesquioxanes and polymerization par…

A Heterobimetallic Anionic 3,6-Connected 2D Coordination Polymer Based on Nitranilate as Ligand

2016

In order to synthesize new coordination polymers with original architectures and interesting magnetic properties, we used the nitranilate ligand (C₆O₄(NO₂)₂2- = C₆N₂O₈2-), derived from the dianionic ligand dhbq2- (2,5-dihydroxy-1,4-benzoquinone = H₂C₆O₄2-). The use of this bis-bidentate bridging ligand led to [(DAMS)₂{FeNa(C₆N₂O₈)₃}·CH₃CN]n (1) (DAMS⁺ = C16H17N₂⁺ = 4-[4-(dimethylamino)-α-styryl]-1-methylpyridinium), a 2D heterometallic coordination polymer presenting an unprecedented structure for any anilato-based compound. This structural type is a 3,6-connected 2D coordination polymer derived from the well-known honeycomb hexagonal structure, where Fe(III) ions alternate with Na⁺ dimers …

Combining inulin multifunctional polycation and magnetic nanoparticles: Redox-responsive siRNA-loaded systems for magnetofection

2019

Superparamagnetic Iron Oxide Nanoparticles (SPIONs) are recognized as one of the most promising agents for theranostic applications. Among methods designed for siRNA delivery, magnetofection, that is, nucleic acid cell uptake under the influence of a magnetic field acting on magnetic nucleic acid vectors, is emerging as a unique approach to combining advantages such as strong improvement of the kinetics of the delivery process and the possibility of localizing nucleic acid delivery to an area where the magnetic field is applied. This paper reports on the preparation of siRNA loaded magnetoplexes&mdash