Search results for "biologia"

Efectos de la exposición prenatal a contaminantes presentes en los alimentos (PCBs y metilmercurio) sobre la capacidad de aprendizaje en ratas. Papel…

2007

Estudiamos los efectos que la exposición Metilmercurio (MeHg) y los bifenilos policlorados PCB153 y PCB126, durante la gestación y lactancia, a tiene sobre la capacidad de aprendizaje en ratas adultas y la relación de las alteraciones causadas con la función de la vía glutamato-óxido nítrico-GMP cíclico en el cerebro. Tanto el MeHg como los PCBs (de la familia de los hidrocarburos aromáticos halogenados) son contaminantes de gran persistencia en el medio ambiente. Se incorporan a la cadena trófica y se concentran especialmente en pescados, mariscos y mamíferos marinos, lo cual supone la exposición de la población humana a estas sustancias. Estos contaminantes son neurotóxicos asociados alte…

Suay i Lerma, Ferran, ed. (2008) Psicobiologia de l'esport i de l'activitat física. València. PUV

2008

Chemical Composition and antimicrobial activity of the essential oils from two species of Thimus growing wild in southern Italy

2009

The volatile constituents of the aerial parts of two samples of Thymus longicaulis C. Presl, collected in Campania and in Sicily, and two samples of Thymus pulegioides L. from the same regions, were extracted by hydrodistillation and analyzed. Considering the four oils together, seventy-eight different compounds were identified: 57 for Thymus longicaulis from Sicily (91.1% of the total oil), 40 for Thymus longicaulis from Campania (91.5% of the oil), 39 for Thymus pulegioides from Sicily (92.5% of the oil) and 29 for Thymus pulegioides from Campania (90.1% of the oil). The composition of the oils is different, although the most abundant components are identical in T. pulegioides. The essent…

Comparative Analysis of Machine Learning Methods to Predict Growth of F. sporotrichioides and Production of T-2 and HT-2 Toxins in Treatments with Et…

2021

The efficacy of ethylene-vinyl alcohol copolymer films (EVOH) incorporating the essential oil components cinnamaldehyde (CINHO), citral (CIT), isoeugenol (IEG), or linalool (LIN) to control growth rate (GR) and production of T-2 and HT-2 toxins by Fusarium sporotrichioides cultured on oat grains under different temperature (28, 20, and 15 °C) and water activity (aw) (0.99 and 0.96) regimes was assayed. GR in controls/treatments usually increased with increasing temperature, regardless of aw, but no significant differences concerning aw were found. Toxin production decreased with increasing temperature. The effectiveness of films to control fungal GR and toxin production was as follows: EVOH…

Antitumor Mechanism of the Essential Oils from Two Succulent Plants in Multidrug Resistance Leukemia Cell

2019

Drug resistance remains a major challenge in the treatment of cancer. The multiplicity of the drug resistance determinants raises the question about the optimal strategies to deal with them. Essential oils showed to inhibit the growth of different tumor cell types. Essential oils contain several chemical classes of compounds whose heterogeneity of active moieties can help prevent the development of drug resistance. In the present paper, we analyzed, by gas chromatography-mass spectrometry the chemical composition of the essential oil of the leaves of Kalanchoe beharensis obtained by hydrodistillation and compared the chemical composition of its essential oil with that of Cyphostemma juttae.…

Physico-Chemical Characterization of an Exocellular Sugars Tolerant Β-Glucosidase from Grape Metschnikowia pulcherrima Isolates

2023

A broad variety of microorganisms with useful characteristics in the field of biotechnology live on the surface of grapes; one of these microorganisms is Metschnikowia pulcherrima. This yeast secretes a β-glucosidase that can be used in fermentative processes to liberate aromatic compounds. In this work, the synthesis of an exocellular β-glucosidase has been demonstrated and the optimal conditions to maximize the enzyme’s effectiveness were determined. There was a maximum enzymatic activity at 28 °C and pH 4.5. Furthermore, the enzyme presents a great glucose and fructose tolerance, and to a lesser extent, ethanol tolerance. In addition, its activity was stimulated by ca…

NUOVE DIPENDENZE. ETIOLOGIA, CLINICA E TRATTAMENTO DELLE DIPENDENZE "SENZA DROGA". VOLUME MONOGRAFICO RIVISTA NOOS

2008

IL VOLUME RACCOGLIE ARTICOLI RELATIVI AL TEMA DELLE DIPENDENZE SENZA DROGHE, CON PARTICOLARE RIFERIMENTO AL GIOCO D'AZZARDO, ALL'INTERNET ADDICTION, ALLO SHOPPING COMPULSIVO. TALI DISTURBI VENGONO AFFRONTATI DAL PUNTO DI VISTA ETIOLOGICO, DIAGNOSTICO E TERAPEUTICO.

IN VITRO ANTI-STAPHYLOCOCCAL BIOFILM ACTIVITY OF SOME NATURAL PYRROLOMYCINS AND SYNTHETIC DERIVATIVES

2008

Key features of bacterial communities in Southern Europe soils vulnerable to desertification

2019

Mediterranean soils are experiencing increasingly negative effects of climate change due to drought and extreme weather phenomena that negatively affect agriculture, already suffering social and economic constraints. The LIFE project DESERT-ADAPT - Preparing desertification areas for increased climate change - (http://www.desert-adapt.it/index.php/en/) focuses on agricultural adaptation measures aimed at reverting ongoing desertification trends, while improving the socioeconomic conditions of farmers. The soil microbiota is recognized as key player in both diversity and productivity of terrestrial ecosystems and it is mandatory to include its role in sustainable agronomic management. In ord…

Genome and phenotype microarray analyses of rhodococcus sp. BCP1 and rhodococcus opacus R7: Genetic determinants and metabolic abilities with environ…

2015

In this paper comparative genome and phenotype microarray analyses of Rhodococcus sp. BCP1 and Rhodococcus opacus R7 were performed. Rhodococcus sp. BCP1 was selected for its ability to grow on short-chain n-alkanes and R. opacus R7 was isolated for its ability to grow on naphthalene and on o-xylene. Results of genome comparison, includ- ing BCP1, R7, along with other Rhodococcus reference strains, showed that at least 30% of the genome of each strain presented unique sequences and only 50% of the predicted proteome was shared. To associate genomic features with metabolic capabilities of BCP1 and R7 strains, hundreds of different growth conditions were tested through Phenotype Microarray, b…