Search results for "Otus"

Phenotypic and genotypic characterization of root nodules rhizobia of Medicago littoralis Rhode and Melilotus indicus (L.) All. growing in the Oasis …

2015

Forty rhizobial strains were isolated from root nodules of Medicago littoralis Rhode and Melilotus indicus (L.) harvested from the sandy soils of Touggourt’s oases in the Oued Righ Valley, Algerian Sahara. The isolates were studied for their cultural, biochemical and symbiotic effectiveness. All of them were fast-growing bacteria; utilized a wide range of carbon sources, produced abundant extracellular polysaccharides, tolerated high concentrations of NaCl (up to 2.5 %), grew at temperatures between 28 and 45 °C and at pH values between 4.5 and 9. The isolates were sensitive to the antibiotics kanamycin, tetracycline and rifampicin but showed resistance to neomycin and erythromycin. All the…

The impact of ocean acidification and warming on the skeletal mechanical properties of the sea urchin Paracentrotus lividus from laboratory and field…

2016

Increased atmospheric CO2 concentration is leading to changes in the carbonate chemistry and the temperature of the ocean. The impact of these processes on marine organisms will depend on their ability to cope with those changes, particularly the maintenance of calcium carbonate structures. Both a laboratory experiment (long-term exposure to decreased pH and increased temperature) and collections of individuals from natural environments characterized by low pH levels (individuals from intertidal pools and around a CO2 seep) were here coupled to comprehensively study the impact of near-future conditions of pH and temperature on the mechanical properties of the skeleton of the euechinoid sea …

Heródoto I 53 y su transmisión en la literatura griega cristiana

2013

El oráculo de Delfos ofrece una respuesta al rey lidio Creso que provocará su ataque contra los persas y su propia derrota. Este oráculo que aparece como un hexámetro dactílico por vez primera en la Retórica de Aristóteles llamará la atención de los apologistas cristianos. Pero la transmisión del mismo, a partir de Eusebio de Cesarea, se verá alterada por la interpolación del término ποταμὸν que romperá el esquema métrico del hexámetro. Después podremos distinguir las fuentes de los autores bizantinos que utilizan este oráculo dependiendo de si respetan la forma que nos ofrece Aristóteles o la que aparece en el texto de Eusebio. Así pues, nuestro estudio consistirá en un análisis de la tran…

Lotus spp: biotechnological strategies to improve the bioeconomy of lowlands in the Salado River Basin (Argentina)

2016

The Salado River Basin region is the most important livestock breeding area in Argentina, wherethe Lotus species has been traditionally cultivated as forages. Nearly 60% of their land surface is dominated by salt-affected soils with severe constraints for crop cultivation. In order to cope with that limitation, farmers have utilized species such as non-native L. tenuis (ex- Lotus glaber), which shows a very good adaptation. As a result, inter-seeding of L. tenuis has been proposed as a strategy of choice for improving forage production in marginal areas. The increase in soil quality by these means is achieved by an increment of the organic matter content, improvement of soil fertility as we…

Antibacterial activity of Mediterranean Oyster mushrooms, species of genus Pleurotus (higher Basidiomycetes).

2013

Extracts of the Mediterranean culinary-medicinal Oyster mushrooms Pleurotus eryngii var. eryngii, P. eryngii var. ferulae, P. eryngii var. elaeoselini, and P. nebrodensis were tested for their in vitro growth inhibitory activity against a group of bacterial reference strains of medical relevance: Staphylococcus aureus ATCC 25923, S. epidermidis RP62A, Pseudomonas aeruginosa ATCC 15442, and Escherichia coli ATCC10536. All of the Pleurotus species analyzed inhibited the tested microorganisms in varying degrees. The data included in this paper for P. nebrodensis and P. eryngii var. elaeoselinii are new reports.

Notes on a New Productive Strain of King Oyster Mushroom, Pleurotus eryngii (Higher Basidiomycetes), a Prized Italian Culinary-Medicinal Mushroom

2015

In this paper, the authors provide data on a culinary-medicinal, host-specific variety of P. eryngii species-complex that is known in Italy as "cardoncello". A species description, the techniques of isolation of a new strain (C-142-c), and the preparation of the substratum are illustrated. Data on the productivity of substratum inoculated with C-142-c strain and the nutritional value of cultivated "cardoncello" mushrooms are also provided.

STUDIO DELLA BIODISTRIBUZIONE DI SOSTANZE BIOLOGICAMENTE ATTIVE IN ORGANISMI ACQUATICI

2022

Proteolytic activity and MMP-14-like protein levels are affected by Vanadium in Paracentrotus lividus Embryo

2023

The increasing industrial use of vanadium (V), as well as its recent medical use in various pathologies has intensified its environmental release, making it an emerging pollutant [1]. The sea urchin embryo has long been used to study the effects induced by metals, including V. In this study we used an integrated approach that correlates the biological effects on embryo development with proteolytic activities of gelatinases that could better reflect any metal induced imbalances. V-exposure caused morphological/morphometric aberrations, mainly concerning the correct dis-tribution of embryonic cells, the development of the skeleton and the embryo volume [2]. Moreover, V induced a concentration…

Characterization of the microbiota from coelomic fluid of the sea urchin Paracentrotus lividus

2016

The study of the microbiota is a subject of considerable and growing interest since it is drawing new important perspectives in the life sciences concerning the functional relationships between metazoans and microbial cells. In fact, it has already shown that the endogenous microbial community affects various physiological activities of multicellular organisms. The coelomic cavity of echinoderms contains a fluid in which coelomocytes are reported to exert immune functions like phagocytosis, opsonization and production of antimicrobial agents against marine bacteria [1, 2]. However, up to day nothing is known about the endogenous bacterial population of coelomic fluid. We focused on this iss…

Can MPS's protect sea urchin stocks?

2017

Sea urchins have long attracted attention from scientists worldwide for their ecological role in coastal areas. Entire communities structures associated to kelp beds and related ecosystem functions were found to strictly depend on grazing by urchins. Sea urchins, in addition, have been used as a food resource by humans since prehistory, and presently they are one of the important sea food (both exploited from the wild and in part obtained from aquaculture) consumed in many regions, but also exported-imported through the world. In the Mediterranean sea, the purple sea urchin Paracentrotus lividus (Lamarck) exerts a key ecological as a main regulator of the structure of coastal communities. A…