Search results for "modification"
showing 10 items of 853 documents
Grafting and characterization of dodecylphosphonic acid on copper: Macro-tribological behavior and surface properties
2013
International audience; Thin film of n-dodecylphosphonic acid (DDPA) was prepared on a copper oxide substrate via a molecular self-assembly process. The composition, structure, organization, surface energy, morphology, and electrochemical behavior of the DDPA filmwere characterized bymeans of X-ray photoelectron spectroscopic analysis (XPS), polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS), contact angle measurement v(CAM), microscopic observations, and electrochemistry. The friction behavior of the DDPA film adsorbed on copper oxide substrate sliding against a Si3N4 ball was examined on a linear reciprocating tribological tester. Worn surfaces of the DDPA film…
Thermally Induced Structural Modification of Silica Nanoparticles Investigated by Raman and Infrared Absorption Spectroscopies
2010
We report an experimental investigation by Raman and infrared (IR) absorption spectroscopies on the structural modifications induced by isochronal thermal treatments on amorphous SiO2 nanoparticles (fumed silica). In particular, three different commercial types of this material, characterized by particle mean diameters of 7, 14, and 40 nm, were subjected to thermal treatments from 100 up to 1000 °C. We found that some properties of fumed silica, such as the SiOSi mean bond angle, ring size distribution, and surface adsorbed water content, are drastically different from those of common bulk silica materials and intimately related to the particles' dimension. The SiOSi mean bond angle, probed…
Heart rate control with oral ivabradine in computed tomography coronary angiography: a randomized comparison of 7.5 mg vs 5 mg regimen.
2013
Background: Heart rate (HR) reduction is essential to achieve optimal image quality and diagnostic accuracy with computed tomography coronary angiography (CTCA). Administration of oral ivabradine seems to be more effective than beta-blockade in reducing HR in patients referred for CTCA. Methods: Two-hundred-fifty-nine consecutive patients referred for CTCA were prospectively enrolled. Patients not receiving beta-blocker at baseline (group 1) and those with beta-blocker therapy (group 2) were enrolled in the study. Each group was randomized into 3 parallel arms with 1:1:1 allocation. Patients who did not receive beta-blocker at baseline: underwent CTCA without beta blocker (n=49), and receiv…
Functionalization of Graphene with Molecules and/or Nanoparticles for Advanced Applications
2019
Graphene is considered the material of the third millennium, due to its extraordinary electronic and mechanical properties, and due to the possibility to modulate its conductivity, flexibility, elasticity, transparency, and biocompatibility by bottom-up approach. The possibility to gather the proper- ties of graphene and graphene oxide with those of functional moieties or nanoparticles is herein reviewed. The synthetic approaches proposed, either covalent or noncovalent, are aimed to tune appropriately graphene’s properties for the realization of materials for advanced uses, such as bio- medical applications, sensors, catalysis, and energy devices. In particular, methods based on covalent l…
<title>Heavy-ion induced damage and reduction of dislocation mobility in LiF single crystals</title>
2006
Ion-induced reduction of dislocation mobility in LiF crystals irradiated with swift heavy (U) and light (Ni) ions of a specific energy of 11 MeV per nucleon at fluences between 106 and 1011 ions/cm2 was studied. The arm length of dislocation rosettes produced by indentation on (100) irradiated surface was measured. It has been found that in the case of heavy ions the threshold fluence (106 ions/cm2) for impeding of dislocation arms is about 3 orders of magnitude lower than that for light ions. The results indicate that ion-induced defect aggregates play the dominating role in the impeding of dislocations. Heavy ions, which produce defect aggregates in the track core, cause also a stronger e…
Déclaration et vérification des créances. Montant déclaré. Modification substantielle. Déclaration nouvelle (oui)
2016
International audience; (Com. 17 novembre 2015, n° 14-18.759, arrêt n° 984 F-D, Sté Groupimo et a. c/ Sté Solution immobilière et a.)
Semiotics of pride and profit: interrogating commodification in indigenous handicraft production
2014
This study investigates the shifting terrain of pride, profit and power relations in minority language communities under contemporary globalisation. While “pride” associates linguistic-cultural heritage with identity and preservation, “profit” views these as sources of economic gain. In contemporary late capitalism, “pride” seems to be increasingly giving way to “profit”. Arguing that this transformation needs to be interrogated in terms of complexity and that a detailed, multilayered semiotic analysis can open a privileged window for such an inquiry, this study combines critical multimodal discourse analysis and an ethnographic approach to analyse processes of semiotic commodification in h…
UNESCO and cultural diversity: democratisation, commodification or governmentalisation of culture?
2012
The Convention on the Protection and Promotion of the Diversity of Cultural Expressions by the United Nations Educational, Scientific and Cultural Organisation (UNESCO) was first adopted by its member states in October 2005. The document defines UNESCO's general principles and conceptualisations regarding culture, cultural diversity and expressions. In order to better manage culture, cultural expressions refer above all to goods and services of the markets, but another, more universally humanitarian and participatory aspect is also present. For the United Nations member states and especially countries that ratified it, the Convention offers policy and legal guidelines to support all forms o…
From ‘socios’ to ‘hyper-consumers’: an empirical examination of the impact of commodification on Spanish football fans
2012
Traditionally, the Spanish game has been analysed in scholarly studies in terms of the effect of crowd violence or the nationalist and regionalist implications of the Spanish clubs. Latterly analysis has also extended to include gender issues (and the process of constructing masculinity, in particular) and a spate of studies dealing with racism and xenophobia, both of which have blighted the Spanish game in recent years. Little attention, however, has been given over to the study of the effects on fans of the rapidly expanding influence of commercialization on football in Spain. With this gap in mind, this study sets out to examine, from an empirical perspective, the social consequences of …
The culture in the era of clutural capitlaism: Trends and Controversies
2014
[EN] This article offers a reflection on the way in which the evolution of capitalism towards a cultural capitalism phase is propitiating the emergence of a new regime of production and reception of cultural products. To approach this task it is examined one of the most clearly observable trends in the evolution that western societies have experienced in the past decades, that is, the transformation of the market in the general pattern of the social activities and the entrance of capitalist patterns in the cultural sphere. The article finishes with a critical analysis of the most frequently consequences attributed to the evolution of capitalism in the cultural domain: the degradation of the…