The main object of this review is the study of fundamentals of adsorption and heterogeneous catalysis, a benefit for the understanding of adsorptive and catalytic properties. This work aims to define ...and record, with the utmost accuracy, the phenomena and the possible reactions. A new methodology for the study of the adsorption is presented, which is a version of the well-known inverse gas chromatography. This reversed-flow inverse gas chromatography (RF-IGC) is technically very simple, and it is combined with a mathematical analysis that gives the possibility for the estimation of various physicochemical parameters related to adsorbent or catalyst characterization, under conditions compatible with the operation of real adsorbents and catalysts. On this base, this methodology has been successfully applied to the study of the impact of air pollutants, volatile organic and/or inorganic, on many solids such as marbles, ceramics, oxide-pigments of works of art, building materials, authentic statues of the Greek Archaeological Museums. Moreover, this methodology proved to be a powerful tool for studying the topography of active sites of heterogeneous surfaces in the nano-scale domain. Thus, some very important local quantities for the surface chemistry have been determined experimentally for many solids including thin films. These physicochemical local quantities (among which adsorption energy and entropy, surface diffusion coefficient, probability density function) have been determined from the experimental pairs of height of extra chromatographic peaks and time by a nonlinear least-squares method, through personal computer programs written in GW BASIC and lately in FORTRAN. Through the time-resolved analysis the surface characterization of the examined materials took place. In addition, the kinetic constants responsible for adsorption/desorption and surface chemical reactions have also been calculated. Thus, important answers have been provided to the following essential questions:
(1)
Can RF-IGC define the gnostic regions of adsorption/desorption, surface diffusion, surface reaction? Yes, irrefutably and undeniably.
(2)
Can RF-IGC deal with issues of catalysis, the existence of more than one reaction? Certainly yes. Indeed, it is impressive to observe the reactions “on line”.
(3)
Can RF-IGC identify peaks of products and reactants simultaneously? Certainly yes.
(4)
Can RF-IGC be applied to thin films in a nano-scale domain? The answer is “definitely yes”.
(5)
Can it kinetically follow the above? Yes, again.
Forum des Halles Pulkkinen, Kari Rainer
valmistusaika: 1989
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Provider: - Institution: - Data provided by Europeana Collections- sisällön kuvaus: Kauppakeskus Forum des Halles, Pariisi 1989. Keskellä Julio Silvanin Pygmalion monumentti.- content description: ...Shopping mall Forum des Halles, Paris 1989. In center the monument Pygmalion by Julio Silvan.- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
The article focuses on the main problems and socio-cultural and political challenges related to the attitude of the professional community, state bodies and society as a whole to cultural and ...artistic monuments. The issues of restoration/revitalization/reconstruction or elimination of cultural heritage were largely actualized as a result of the direct military invasion of the Russian invaders on the territory of Ukraine in order to destroy the country, Ukrainian self-identification and us as a separate, independent nation. The paper provides examples of complex discussion aspects in relation to artefacts of architecture and art of different political eras, different ideological orientation, practical significance, material value and the degree of destruction / preservation in the context of the transformation of society's attitude to them and the prospects for future post-war reconstruction.
Provider: - Institution: - Data provided by Europeana Collections- Portrait de profil d'un jeune homme.- All metadata published by Europeana are available free of restriction under the Creative ...Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- Brutails archiviste - Bordeaux»«- All metadata published by Europeana are available free of restriction under the Creative Commons ...CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- Croquis d'un jeune garçon assis sur une chaise.- All metadata published by Europeana are available free of restriction under the ...Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- Portrait d'une femme.- All metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 ...Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- Plan d'une petite église rurale, dont l'identification est inconnue.- All metadata published by Europeana are available free of ...restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- (reliure en bas) Croquis d'un oculus quadrilobé.- All metadata published by Europeana are available free of restriction under the ...Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
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