Search results for "Liste"
showing 10 items of 632 documents
La linea spezzata. Una ricostruzione critica dell'attuale deficit di coerenza
2021
Siamo nell’era della smemoratezza. Una smemoratezza prodotta dalla sovrabbondanza di informazioni, dalla pratica del multitasking, dalla propensione a demandare la conservazione dei ricordi ai device e ai cloud di cui facciamo uso ogni giorno. La fragilità della memoria ha spezzato la linea che congiungeva passato, presente e futuro, la linea che li attraversava e li rendeva coerenti. Ma lo ha fatto solo nella nostra testa, perché sul piano della realtà gli effetti delle scelte di ieri non smettono di presentarsi all’oggi. L’allargamento degli orizzonti culturali prodotto dalla globalizzazione ha ridotto tutti gli elementi del nostro panorama a dettagli lontani e indistinguibili. Ma lo ha f…
Karen Knorr, le faux et les variations d'une fabuliste
2012
Dans sa serie de photographies, Fables (2003-2009), Karen Knorr place sa demarche sous le signe du faux et de la fiction, par un jeu de references culturelles et de dispositifs procedant de la mise en scene, du montage et de la narration. Dans des environnements museographiques ou des espaces patrimoniaux reputes et aisement identifiables, qui sont de somptueuses demeures d’Ancien Regime ou de froides architectures modernes, la photographe provoque l’irruption improbable d’un bestiaire sauvage suscitant l’amusement ou l’inquietude. Dans chacune de ses compositions jouant avec la veracite pretee a l’image photographique, Karen Knorr cree une confrontation entre culture et nature, dont l’arti…
Desplazamientos : una reflexión sobre la posibilidad de escuchar el horror
2014
Resumen : Las relaciones que existen entre la poesia y la representacion del fenomeno de la Shoah han sido ampliamente estudiadas por la filosofia y los estudios literarios, interesados en todo lo que concierne a la memoria y al recuerdo del horror. Sin embargo, creo que las razones que llevan a algunos sobrevivientes de la ultima dictadura militar argentina a afirmar que la poesia es el genero mas adecuado para aproximarse a la representacion del horror estan todavia insuficientemente exploradas. A partir de la critica filosofica de la representacion y del estudio contemporaneo sobre la significacion de la escucha, ahondare en el sentido de la afirmacion sobre la poesia y el horror. Palab…
Molecular modes of action of cantharidin in tumor cells
2005
Cancer chemotherapy is often limited by patient's toxicity and tumor drug resistance indicating that new drug development and modification of existing drugs is critical for improving the therapeutic response. Traditional Chinese medicine is a rich source of potential anticancer agents. In particular, cantharidin (CAN), the active principle ingredient from the blister beetle, Mylabris, has anti-tumor activity, but the cytotoxic mechanism is unknown. In leukemia cells, cantharidin induces apoptosis by a p53-dependent mechanism. Cantharidin causes both DNA single- and double-strand breaks. Colony-forming assays with knockout and transfectant cells lines showed that DNA polymerase beta, but not…
Quantification of Listeria monocytogenes in salads by real time quantitative PCR
2005
Abstract A real time quantitative PCR (RTQ-PCR) was carried out purifying DNA extracts of Listeria monocytogenes using a High Pure Listeria Sample Preparation Kit and quantifying in a LightCycler system with hybridisation probes. A standard curve was constructed with serial dilutions. A range linear relationship, from 10 to 10 5 L. monocytogenes colony forming units (CFU), was observed between threshold cycle ( C t ) and logarithmic concentration of the serial dilutions. The assay was linear in a range from 10 to 10 5 L. monocytogenes CFU and the coefficient of determination ( r 2 ) was > 0.98. RTQ-PCR presented an efficiency of > 85%. The accuracy of the PCR-based assay, expressed as % bia…
Comparison of Four Commercial DNA Extraction Kits for PCR Detection of Listeria monocytogenes, Salmonella, Escherichia coli O157:H7, and Staphylococc…
2008
Four commercial DNA extraction methods, PrepMan Ultra (Applied Biosystems), InstaGene Matrix (BioRad), DNeasy Tissue kit (Qiagen), and UltraClean (MoBio), were tested for PCR detection of Listeria monocytogenes, Escherichia coli O157: H7, Salmonella, and Staphylococcus aureus in fresh, minimally processed vegetables. For comparative purposes, sensitivity assays with specific PCRs were carried out after DNA extraction with the four methods in green pepper, broccoli, and onion artificially inoculated with the four pathogens separately. As confirmed by statistical analysis, the DNeasy Tissue kit rendered the highest sensitivity values in the three matrices assayed for Salmonella, L. monocytoge…
Growth form matters – Crustose lichens on dead wood are sensitive to forest management
2022
Lichens have a vital role in forest ecosystems and they are a threatened group in boreal forests. However, the conservation ecology of the total lichen community has very rarely been studied. Here we studied lichen species and communities, including macrolichens (=foliose and fruticose growth forms) and rarely studied crustose li-chens, on decaying wood in boreal spruce-dominated forests in Finland. We also studied obligate lignicoles that grow only on dead wood and are mostly crustose in growth form. Species richness and community composition were examined on decaying logs and natural or cut stumps of Picea abies at different decay stages (2-5) in 14 stands, half of which were natural or s…
Putting Bits and Pieces Together: Awareness of Text Structure in Jigsaw Reading
2013
Issues concerning Language Awareness have been debated for about 40 years (Hawkins 1999) and have brought about many interesting developments in the area of language teaching and learning. In the following text, the official definition and scope of language awareness studies are briefly presented. Then, language awareness within the framework of foreign text comprehension—a crossroad where different types of knowledge, linguistic and non-linguistic, and a variety of cognitive processes meet and interact—is discussed. Since text comprehension is such a complex process, it requires the readers to use various forms of language awareness. The study reported in the second part of the paper was d…
Activities using blackboard, pens and paper
1998
Dictogloss Language Listening comprehension Level Elementary upwards Age Any This is a well established dictation-based activity which helps to develop conscious listening skills in addition to an awareness of phrase and sentence structures. Procedure Choose a sentence suitable for the level of the class. This might be a sentence from a coursebook, but if so, make sure it is one which is not yet familiar to your students. An example sentence is given below. Tell the class that you will read this sentence to them once only. They should write down the key words as you read. You should not have to repeat the sentence, but with a large class you might like to read it once at the front of the ro…
Shaping graphene with optical forging: from a single blister to complex 3D structures
2020
Properties of graphene, such as electrical conduction and rigidity can be tuned by introducing local strain or defects into its lattice. We used optical forging, a direct laser writing method, under an inert gas atmosphere, to produce complex 3D patterns of single layer graphene. We observed bulging of graphene out of the plane due to defect induced lattice expansion. By applying low peak fluences, we obtained a 3D-shaped graphene surface without either ablating it or deforming the underlying Si/SiO2 substrate. We used micromachining theory to estimate the single-pulse modification threshold fluence of graphene, which was 8.3 mJ cm−2, being an order of magnitude lower than the threshold for…