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1

Schiff Base Metal Complexes of Chromium(III), Manganese(III), Iron(III), Oxovanadium(IV), Zirconium(IV) and Dioxouranium(VI)

100%

Mandlik P. , Aswar A.

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tom Vol. 77 / nr 2

129-135

EN

The Schiff base 2,5-dihydroxyacetophenone isonicotinoyl hydrazone (H2L) has been synthesized by condensation of 2,5-dihydroxyacetophenone with isonicotinoyl hydrazide in ethanol. Metal complexes of the Schiff base were prepared from salts of Cr(III), Mn(III), Fe(III), VO(IV), Zr(IV) and UO2(VI). Characterization of the ligand and its metal complexes were carried out by elemental analysis, molar conductivity, magnetic susceptibility measurements, IR, 1H NMR, electronic and thermogravimetric analysis in air. The Schiff base behaves as flexidentate ligand and commonly coordinates through the oxygen atom of the deprotonated phenolic group and the nitrogen atom of azomethine group. The thermal data have been analyzed for the kinetic parameters by Broido and Horowitz-Metzger methods. All the compounds were also screened for their antimicrobial activity by agar cup-plate method against various organisms and the results have been compared.

2

Novel Coordination Complexes of the Trivalent Ruthenium, Rhodium and Iridium with Hydrazones Derived from Isatin Hydrazide and Various Aldehydes with Spectral and Biological Characterization

100%

Sharma V. , Srivastava S. , Srivastava A.

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2006

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tom Vol. 80, nr 3

387-396

EN

Aseries of several new ruthenium(III), rhodium(III) and iridium(III) complexes with hydrazones of general formula [M(LH)3]Cl3 were synthesized in order to meet requirements essential for biological properties. Hydrazones were formed by isatin hydrazide and various aldehydes namely anisaldehyde, benzaldehyde, o-chlorobenzaldehyde, p-chlorobenzaldehyde and p-fluorobenzaldehyde. Physicochemical characterization of compounds has been carried out by elemental analyses, spectroscopic (IR, electronic, 1H NMR), thermogravimetric and magnetic studies. These complexes show higher conductance values, supporting their electrolytic nature. All the studies revealed octahedral nature of the complexes with nitrogen and oxygen of azomethine and carbonyl group as binding sites and exhibited monomeric nature of the complexes. Rhodium(III) and iridium( III) complexes were found diamagnetic and show intense absorptions while ruthenium( III) complexes show paramagnetic behaviour. In addition, antifungal and antibacterial studies have been carried out in vitro for investigated compounds against fungus A. niger and F. oxysporium and bacteria E. coli and S. aureus. Most of the metal chelates show higher biocidal activity for the above microorganisms than that of the free ligand.

3

Modelling sequential events for risk, safety and maintenance assessments

75%

Eid M.

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tom Vol. 1, No. 1

83--88

EN

Assessing the Occurrence Probability of a given sequence of events in a determined order is necessary in many scientific fields. That is the case in the following fields: nucleation and microstructure growth in materials, Narrow-Band process, financial risk analysis, Sequential detection theory, rainfall modelling, in optics to model the sequences of photoelectrons under detection, population biology, software reliability, queuing in network traffic exhibiting long-range dependence behaviour, and DNA sequences and gene time expression modelling. However, the topic has a particular interest in the field of risk, safety and maintenance assessments. The lecture will focus on sequences composed of Double Stochastic Poisson Processes.

4

Objects of Embodiment: A “Post-Material Turn” in Exhibiting Lost Material Culture

75%

Zimmermann T.

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tom 29

249-274

EN

Exhibiting lost material culture goes beyond documenting, preserving, reconstructing, and staging material traces of the past. Museums, possessing modest collections of original historical objects, have to search for new ways of exhibiting material culture thereby replacing facts (original objects, documents, documentary media) by bodily experience similar to that evoked by mystical religious art addressing different human senses beyond the vision. Bodily sensations can be evoked by ambiences, following expressionist or constructivist architecture, by sculptural displays in tradition of the avant-garde, by soundscapes and large scale image projections evoking illusion and immersion. The “post-material turn” comprises thus not only virtual culture, but also new material approaches to the memory of the past, shifting from original historical artifacts to reproductions and substitutes, evoking an intense bodily experience. Although history gets space for embodiment, such ambiences evoke a strong sense of loss, because they avoid immediate contact with traces of the past by virtual and material “doubles”. The “post-material turn” will be discussed with the example of The Jewish Museum and Tolerance Center in Moscow, relating it to other contemporary “postdocumentary” and “post-factual” phenomena in memorial culture.

5

THE ELECTROPHYSIOLOGY OF FLOW

63%

Soltész P. , Magyaródi T. , Mózes T. , Nagy H. , Oláh A.

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nr 1

77-103

EN

The study aims to explore the spectral properties of flow and antiflow states. 20 young male participants played a collision-avoidance computer-game while their spectral EEG activity have been measured. Flow, boredom, and anxiety conditions were differentiated with the help of personal adjustment of the game speeds. Personal baseline values were obtained with an objective and a subjective preliminary skill measurement on the same computer-game. The spectral activities of the subjects through the three conditions showed that generally under the flow condition the activity is lower than in the anxiety condition, but higher than in the boredom condition regarding delta, theta, beta, and gamma spectra. More importantly the temporal dynamics shows, that initially in flow and anxiety conditions an ascending activity can be observed, whereas after a climax in the activity graph a strong decline appears in the flow condition (beta and gamma), while this is weakly or not at all present in the anxiety condition, and an increase appears in the boredom condition. Our results support the hypofrontality hypothesis of flow and points out the importance of measuring flow in its temporal dynamics. The behavioural data does not support the idea of flow as a mechanism for effectance-optimalisation, but rather as a mechanism for optimalising for the maximalisation of gaining information and/or experience.