Search results for "IAC"
showing 10 items of 4189 documents
Comprehensive valorisation of technically relevant organosolv lignins via anodic oxidation
2021
Lignin represents the largest renewable feedstock of aromatic moieties in nature. However, its valorisation towards organic chemicals poses a challenging task. We herein report the selective electrochemical depolymerisation of several technically relevant organosolv lignins to aromatic fine chemicals with a simple two-electrode arrangement using caustic soda as electrolyte. Vanillin, syringaldehyde, the corresponding ketones and guaiacol were obtained with a combined maximum of 7.8 wt% isolated yield. Deeper insight in the process was provided by FT-IR, HSQC NMR and 31P NMR analyses of the lignins.
Characterization of Nanostructured SilicaCat Pd0
2011
Structural investigation on nanostructured SiliaCat Pd0 palladium catalyst sheds light into the origins of the remarkable activity of these new catalytic materials.
The chemical composition of essential oil from Seseli bocconei (Apiaceae) aerial parts growing in Sicily (Italy)
2022
Seseli is a large genus of aromatic and economically important herbs of the Apiaceae family that includes eighty-seven taxa, mainly distributed in Europe and Asia. Several species of this genus are extensively used in various popular medicines and based on their traditional uses, much research concerning biological activities have been carried out. In the present study, the chemical composition of the essential oil from aerial parts of Seseli bocconei Guss., a rare plant endemic of Sicily, was analysed by GC-MS. No one report has been previously published on the essential oil of this species. The result showed the presence of large quantity of monoterpene and sesquiterpene hydrocarbons wher…
The chemical composition of essential oil from Seseli tortuosum subsp. tortuosum and S. tortuosum subsp. maritimum (Apiaceae) aerial parts growing in…
2022
Seseli L. genus, belonging to the Apiaceae family, includes more than eighty taxa, mainly growing in Europe and Asia. Due to the several biological properties, species of this genus have been largely investigated, showing to be a rich source of coumarins, as well as, of essential oils with anti-inflammatory, antiviral, antifungal, cytotoxic, etc. properties. In the present study, the chemical composition of the essential oils from aerial parts of Sicilian accessions of Seseli tortuosum subsp. tortuosum and S. tortuosum subsp. maritimum were analysed by GC-MS. No one report has been previously published on the subsp. maritimum. The results showed the presence, in both oils, of large quantity…
Phenazine antibiotics produced by fluorescent pseudomonads contribute to natural soil suppressiveness to Fusarium wilt
2009
Natural disease-suppressive soils provide an untapped resource for the discovery of novel beneficial microorganisms and traits. For most suppressive soils, however, the consortia of microorganisms and mechanisms involved in pathogen control are unknown. To date, soil suppressiveness to Fusarium wilt disease has been ascribed to carbon and iron competition between pathogenic Fusarium oxysporum and resident non-pathogenic F. oxysporum and fluorescent pseudomonads. In this study, the role of bacterial antibiosis in Fusarium wilt suppressiveness was assessed by comparing the densities, diversity and activity of fluorescent Pseudomonas species producing 2,4-diacetylphloroglucinol (DAPG) (phlD+) …
Validación concurrente y de constructo de una escala para valorar el esfuerzo percibido de hombres jóvenes durante el ciclismo acuático
2023
Se ha recomendado la actividad física en el medio acuático con colocación vertical del cuerpo en una variedad de programas y actividades de ejercicio físico debido a sus positivos beneficios relacionados con la salud y el rendimiento físico. Esto ha atraído y aumentado el número de individuos aparentemente sanos de diferentes grupos de edad y sexo, e, incluso, aquellos con necesidades especiales que realizan ejercicios en el medio acuático. Además de las ventajas del entrenamiento en el medio acuático para el acondicionamiento físico general, se ha producido una expansión en el universo del “aqua fitness” debido a la aparición de varios tipos de equipos o materiales desarrollados para poten…
Chemical composition, antimicrobial and antioxidant activities of the essential oil of Italian Prangos trifida (Mill.) Herrnst. & Heyn
2022
In this work, the essential oil of the aerial parts of a not previously investigated accession of Prangos trifida (Mill.) Herrnst. & Heyn (Apiaceae), collected in Northern Italy, was analysed by GC/MS. Twenty-five compounds were identified, accounting for 91.30% of the total oil, which is characterised by a high content of monoterpene hydrocarbons (71.26%). The main constituents of the essential oil were cis-beta-ocimene (18.12%), alpha-phellandrene (12.14%), sylvestrene (11.32%), p-mentha-1,3,8-triene (9.56%) and alpha-pinene (8.85%). The essential oil of P. trifida showed a good antimicrobial activity directed above all against Gram-positive bacteria, and had an interesting antioxidan…
Estudio comparativo de la respuesta inflamatoria en diferentes estrategias de cirugía de revascularización coronaria
2012
INTRODUCCIÓN: La Cirugía de Revascularización Coronaria con derivación cardiopulmonar, es causa de una potente respuesta inflamatoria sistémica, que puede afectar a la evolución del postoperatorio. El objetivo fundamental, ha sido estudiar las diferencias en el comportamiento de la respuesta inflamatoria en las primeras 48 horas del postoperatorio, en la cirugía de revascularización coronaria con circulación extracorpórea convencional, y determinar la modulación de la respuesta inflamatoria cuando se añaden corticoides a la CEC o bien cuando se evita realizando una cirugía sin circulación extracorpórea. MATERIAL Y MÉTODO: Diseñamos un estudio unicéntrico, prospectivo, comparativo. Se incluy…
Factores facilitadores y barreras en la transición a la ciencia abierta: perspectiva de los agentes del sistema científico español
2022
This paper presents the results of a research study whose objective was to identify the facilitating factors and barriers that, in the opinion of representatives of the Spanish scientific community, impact the implementation of the new open science model in four areas: open access, open research data, research assessment and open peer review. A qualitative study was designed in which information was obtained through interviews with researchers, editors of scientific journals, representatives of assessment agencies and vice-chancellors, and through a focus group of librarians with expertise in aspects of open science. The enabling factors and barriers identified were related to the researche…
Teksti lasīšanai klasiskajā sīriešu valodā
2017
Parallel texts from New Testatment in Syriac and Greek for home reading or in class in Classical Syriac, composed by Dainis Zeps.