Search results for "Visual"

Micro-Raman study of red decorations in French faiences of the 18th and 19th centuries

2006

Obtaining the red color was a technical and economic challenge for the French faience manufactories in the 18th and 19th centuries. The tendency of the red hematite to turn into drab brown during the firing process explains the difficulty in obtaining this color. Red decorations in shards coming from the four production centers of faience manufacturing during this period—Rouen (northwest), Nevers (central), Thiviers (southwest) and Argonne (northeast)—have been studied by means of micro-Raman spectroscopy, scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). Among them, Thiviers appears to be the leader thanks to a particular reddish sandstone called ‘Gres de T…

Dynamics of Metal Centers Monitored by Nuclear Inelastic Scattering

2005

Nuclear inelastic scattering of synchrotron radiation has been used now since 10 years as a tool for vibrational spectroscopy. This method has turned out especially useful in case of large molecules that contain a M\"ossbauer active metal center. Recent applications to iron-sulfur proteins, to iron(II) spin crossover complexes and to tin-DNA complexes are discussed. Special emphasis is given to the combination of nuclear inelastic scattering and density functional calculations.

Assosiaatioiden ja sekvenssien louhinta suurista datamassoista

2006

Does the journalistic photograph need a context? : Rethinking contextual interpretation

2017

In times when photojournalists experiment with various forms of visual production and journalistic photographs are disseminated not only in the press, but at the photography festivals and in museums, the question about the role of context in photography interpretation should be revisited. Thus, this study provides critical review of the contextual interpretation of journalistic images, focusing on the production, medium and page context. The context of production is discussed here by referring to the quantitative content analysis and iconological context analysis. The context of medium determines the perception of photographs and provides a particular page context, usually limited to the ca…

Interpretation of journalistic photographs as an instrument of visual literacy education

2016

Images are produced, used and distributed on an enormous scale. However, the skills of understanding, interpreting and using images as well as thinking and learning in terms of images are taken for granted, and thus, they are not sufficiently taught and developed, especially in higher education. The need for introducing visual literacy into the curriculum was identified in late 1960s, but no concrete guidelines have followed. This study proposes to apply interpretation of journalistic photographs as an instrument of visual literacy education. The main focus is on the image interpretation process and the kinds of meanings viewers apply to a photograph in the interpretation process. In each o…

Luonnonvoimat Välimerellä : metaforat, kartat ja pakolaisuus

2021

Camouflage in arid environments: the case of Sahara-Sahel desert rodents

2020

Deserts and semi-deserts, such as the Sahara-Sahel region in North Africa, are exposed environments with restricted vegetation coverage. Due to limited physical surface structures, these open areas provide a promising ecosystem to understand selection for crypsis. Here, we review knowledge on camouflage adaptation in the Sahara-Sahel rodent community, which represents one of the best documented cases of phenotype-environment convergence comprising a marked taxonomic diversity. Through their evolutionary history, several rodent species from the Sahara-Sahel have repeatedly evolved an accurate background matching against visually-guided predators. Top-down selection by predators is therefore …

Development of DNA aptamers for visualization of glial brain tumors and detection of circulating tumor cells

2023

Here, we present DNA aptamers capable of specific binding to glial tumor cells in vitro, ex vivo, and in vivo for visualization diagnostics of central nervous system tumors. We selected the aptamers binding specifically to the postoperative human glial primary tumors and not to the healthy brain cells and meningioma, using a modified process of systematic evolution of ligands by exponential enrichment to cells; sequenced and analyzed ssDNA pools using bioinformatic tools and identified the best aptamers by their binding abilities; determined three-dimensional structures of lead aptamers (Gli-55 and Gli-233) with small-angle X-ray scattering and molecular modeling; isolated and identified mo…

Rapid self-healing and anion selectivity in metallosupramolecular gels assisted by fluorine-fluorine interactions.

2017

Simple ML2 [M = Fe(II), Co(II), Ni(II)] complexes obtained from a perfluoroalkylamide derivative of 4-aminophenyl-2,2′,6,2′-terpyridine spontaneously, yet anion selectively, self-assemble into gels, which manifest an unprecedented rapid gel strength recovery, viz. self-healing, and thermal rearrangement in aqueous dimethyl sulfoxide. The key factor for gelation and rheological properties emerges from the fluorine–fluorine interactions between the perfluorinated chains, as the corresponding hydrocarbon derivative did not form metallogels. The perfluoro-terpyridine ligand alone formed single crystals, while its Fe(II), Co(II) or Ni(II) complexes underwent rapid gelation leading to highly enta…

Tieto- ja viestintätekniikan hyödyntäminen yläkoulun kemian opetuksessa

2013

Tämän pro gradu –tutkielman tarkoituksena oli kouluttaa Riihimäen kemian opettajia tieto- ja viestintätekniikan (TVT) pedagogisessa käytössä. Koulutus suunniteltiin kyselytutkimuksen vastausten perusteella. Tutkimuksessa haluttiin kartoittaa sitä, miten kemian opettajat hyödyntävät TVT:tä opetuksessaan ja minkälaisia toiveita heillä on räätälöitävälle täydennyskoulutukselle. Täydennyskoulutuksessa opettajat kokeilivat ChemSketch-visualisointiohjelman toimintaa ja he saivat koulutuksesta mukaansa harjoitustyöohjeen. Tuon harjoitustyöohjeen avulla opettajat voivat ottaa kyseisen ohjelman käyttöönsä omassa kemian opetuksessaan. Koulutuksessa opettajat tutustuivat myös mittausautomaatiolaitteen…