Search results for "APR"

El papel que desempeñan las teorías en la Biología

2006

Resumen basado en el de la publicación Resumen en inglés Se trata de enfatizar la importancia del término interpretación de la teoría y su uso indebido en la educación científica. También se discute la conveniencia de enseñar biología como una ciencia hipotético-deductiva, y el papel que el mapeo conceptual juega en estos elementos. ESP

Il paesaggio della Grecia nei Taccuini

2016

D’Annunzio does not dream, but really sees, leading an impressionistic and syncopated storytelling in which he portrays scenes of true reality. Léon Bakst (author of the theatrical productions of the Martyre de Saint Sébastien, La Pisanelle and Phaedra) similarly proceeds, drawing in some works, Narcisse (1911), L'Après-midi d'un Faune (1912), Daphnis et Chloé (1912), Helene de Sparte (1912), those figurative motifs that the poet notes in his travels, such as the intense green of nature, the austere red rocks, the arid and wild lands.

Apprendenti universitari e profili di competenza nella scrittura accademica

2021

Nell'ambito delle ricerche sulle competenze linguistiche degli studenti universitari in Italia, il contributo indaga le pratiche di comunicazione scritta e le relative difficoltà espresse da studenti di un corso di recupero OFA in corsi di laurea triennale. L'indagine è parte di un progetto di rilevazione più ampio ed è stata realizzata somministrando un questionario informatizzato. I dati raccolti permettono di sviluppare alcune riflessioni utili sul profilo linguistico-comunicativo di apprendenti dalle competenze definite "fragili"; la loro autorappresentazione in termini di biografia linguistica; i bisogni linguistico-comunicativi espressi in rapporto ai compiti di scrittura, e il senso …

Insects’ potential: Understanding the functional role of their gut microbiome

2021

The study of insect-associated microbial communities is a field of great importance in agriculture, principally because of the role insects play as pests. In addition, there is a recent focus on the potential of the insect gut microbiome in areas such as biotechnology, given some microorganisms produce molecules with biotechnological and industrial applications, and also in biomedicine, since some bacteria and fungi are a reservoir of antibiotic resistance genes (ARGs). To date, most studies aiming to characterize the role of the gut microbiome of insects have been based on high-throughput sequencing of the 16S rRNA gene and/or metagenomics. However, recently functional approaches such as m…

Matemātika

1997

Risk assessment associated to the intake of the emerging Fusarium mycotoxins BEA, ENs and FUS present in infant formula of Spanish origin

2012

Abstract Forty-five samples of Spanish follow-up infant formula with different chemical compositions were analyzed determining the emerging Fusarium mycotoxins beauvericin (BEA), enniatins (ENs) (A, A 1 , B, B 1 ), and fusaproliferin (FUS). The samples were extracted three times with ethyl acetate using an Ultra-turrax homogenizer. Mycotoxins were identified and quantified using a liquid chromatography (LC) coupled to a diode array detector (DAD). Results showed that the percentage of the samples contaminated with ENs and FUS were 46.6 and 20.0% respectively, whereas all analyzed samples were free of BEA. The ENs A and B were detected only in one sample with 149.6 and 39.4 mg/kg respectivel…

Further data on the levels of emerging Fusarium mycotoxins enniatins (A, A1, B, B1), beauvericin and fusaproliferin in breakfast and infant cereals f…

2011

Abstract Sixty-eight samples of cereals products, including breakfast cereals ( n  = 48) and infant cereals ( n  = 20), purchased from supermarkets and pharmacies in Rabat-Sale area from Morocco were analysed for the determination of six emerging mycotoxins: four enniatins ENs (ENA, ENA1, ENB and ENB1), beauvericin (BEA) and fusaproliferin (FUS). Samples were extracted with a mixture of acetonitrile:water (85:15, v/v), using an Ultra-Turrax® homogeniser. Mycotoxins were then identified and quantified by liquid chromatography (LC) with diode array detection (DAD). Positive samples were confirmed by LC–MS/MS. Analytical results showed that the percentages of analysed samples contaminated with…

Isolation and purification of enniatins A, A1, B, B1, produced by Fusarium tricinctum in solid culture, and cytotoxicity effects on Caco-2 cells

2010

Enniatins (ENs) are antibiotic compounds of hexadepsipeptidic structure produced by several strains of Fusarium spp. The ENs A, A(1), B, B-1 were purified from extracts of Fusarium tricinctum grown on a solid medium of corn, by a low pressure liquid chromatography (LPLC) on reverse phase of Amberlite XAD-7 followed by semipreparative LC. The purity and the structure of the isolated compounds were confirmed by LC-MS/MS. The technique of the purification of the fungal extract enabled complete separation of the ENs A, A(1), B, B-1 with a mean purity of 97% for all the compounds. The cytoxicity of the ENs was tested in the cell lines of human origin (epithelial colorectal adenocarcinoma cells, …

Further data on the presence of Fusarium emerging mycotoxins enniatins, fusaproliferin and beauvericin in cereals available on the Spanish markets.

2010

In this work, 64 samples of cereals purchased from local markets in the Valencian community (Spain) were investigated for the presence of six emerging mycotoxins: enniatins ENs (ENA, ENA1, ENB and ENB1), beauvericin (BEA) and fusaproliferin (FUS). Samples were extracted with a mixture of water/acetonitrile (85/15, v/v) by using an Ultra-turrax homogenizer. Mycotoxins were then identified and quantified with a liquid chromatography (LC) with diode array detector (DAD). Positive samples were confirmed with an LC-MS/MS. Analytical Results showed that the frequencies of contamination of samples with ENs, BEA and FUS were 73.4%, 32.8% and 7.8%, respectively. ENA1 was the most mycotoxin found and…

Presence of Fusarium emerging mycotoxins in tiger-nuts commercialized in Spain

2012

Abstract Tiger-nuts are tubers from the plant Cyperus esculentus which are commercialized in some regions of West and Central Africa, USA and Spain. These tubers have a high microbial charge such as bacteria, moulds and yeasts which could remain until the finished product. In this study we examined 47 samples of tiger-nut tubers purchased from Spanish supermarkets for contamination with the emerging Fusarium mycotoxins: Enniatins ENs (EN A, EN A1, EN B and EN B1), beauvericin (BEA) and fusaproliferin (FUS). The extraction of the samples was carried out with methanol using an Ultraturrax homogenizer. Mycotoxins were analyzed with a liquid chromatography (LC) coupled to a diode array detector…