Det självförsörjande passivhuset

The housing sector uses 40 % of the energy in Sweden and half of the electricity usage. The use of energy is the main reason to the increasing rate of carbon dioxide in the atmosphere. This is the main motive but also a wish of higher safety, that is a higher rate of selfsufficient energy production in Sweden, we want to decrease the need of using fossil fuel. Now when the energy price rise, the interest in energy issues increase and more people discuss the possibility of reducing the usage of fossil fuel. A change to renewable energy such as sun, wind and water is the only solution where we can get a sustainable development. One way to contribute to a better use of energy is to build in the principle of passive house. The house is being built with a thick and tight insulation. If you use a heat-exchanger with high degree of efficiency and a final heating battery on the ventilation system, the heat from lamps, devices and the ones living in the house should be enough to fulfil the criteria of living. The total consumption of energy is reduced by 50 % and the need of heating in the house is reduced by 80 %. A passive house mainly uses electricity for heating which is a shame, because it loses its fine quality when it is used for heating. This report deals with different techniques of reducing and supply energy in a passive house. Initiator: Sol & Energiteknik SE AB in Huskvarna Delimitation: Only to use standard techniques. The main principle for the energy production is local and the project deals with three different parts. The first part deals with a passive house which uses the energy from the sun to fulfil its energy need. The energy system consists of a PV-cell for electricity and a solar collector for heating the tap water. The PV-cell is connected to the grid, and the grid is being used as storage for electricity. The second part deals with a future scenario where the PV-cell is the primary energy source and the energy is stored as hydrogen, which can be transformed back to electricity in a fuelcell. This solution is possible but not financial reasonable because of the high expense. The third solution describes the possibility of using wind power as an energy source for the passive house. By starting a wind co-operative the ones living passive houses can solve their energy situation in an easy and economic way. The conclusion is that it is already possible to make a passive house self-sufficient on energy. There are still some issues that have to be solved and minimized, mainly the cost for the whole energy system

Between persistence and change-methodological aspects of the Corn-Markezic Villa reuse, Sarajevo

[EN] This paper examines the questions of time (transience) and space (persistence) in architecture and culture. The endurance and relevance of these topics are best seen in the integration of architectural heritage into contemporary life. The paper elaborates this by applying a methodological-applicative model to the renovation of the modernist Corn-Markesic villa in Sarajevo s Crni Vrh housing estate, which has been designated a national monument of Bosnia and Herzegovina. The model seeks to achieve a practical and architecturally creative solution for the villa s adaptations. Although changing the Crni Vrh urban context might change the appearance and values of the villa, the opposite is also true: the adaptation of the villa to meet contemporary requirements may change its current context. This paper examines the character of the villa s renovation though field research and the development of an architectural design, to reflect present and future needs, but still faithfully represent the past. The suggested adaptation model follows the lifecycle of a family, and questions the possibilities of transformation at the point at which certain spatial structures and content are no longer needed. The design and research process adheres to guidelines in the European Cultural Heritage Green Paper.Turkusic Juric, E.; Bradic, H. (2022). Between persistence and change-methodological aspects of the Corn-Markezic Villa reuse, Sarajevo. VITRUVIO - International Journal of Architectural Technology and Sustainability. 7(1):46-61. https://doi.org/10.4995/vitruvioijats.2022.17456OJS46617

Cytogenotoxic effects of two potential anticancer Ruthenium(III) Schiff Bases complexes

Introduction: Treatment of cancer has been subject of great interest. Researchers are continuously searching for new medicines. In this sense, ruthenium complexes have big potential. Some evidences suggest that ruthenium compounds possess anticancer activities. We synthesized two recently published ruthenium(III) complexes with bidentate O,N and tridentate O,O,N Schiff bases derived from 5-substituted salicylaldehyde and aminophenol or anilineare. These compounds showed affinity for binding to the DNA molecule, however, insufficient data are available regarding their possible toxic effects on biological systems. Methods: In the present study we evaluated genotoxic, cytotoxic, and cytostatic effects of Na[RuCl2(L1)2] and Na[Ru(L2)2], using the Allium cepa assay. Results: Different toxic effects were observed depending on the substance, tested concentration, and endpoint measured. In general, the tested compounds significantly lowered the root growth and mitotic index values as compared to the control group. Additionally, a wide range of abnormal mitotic stages, both clastogenic and non-clastogenic were observed in the treated cells. Na[RuCl2(L1)2] significantly increased the frequency of sticky metaphases, chromosome bridges, micronuclei, impaired chromosome segregation, as well as number of apoptotic and necrotic cells over the controls. In contrast, Na[Ru(L2)2] did not show significant evidence of genotoxicity with regard to chromosome aberrations and micronuclei, however, significant differences were detected in the number of apoptotic and necrotic cells when the highest concentration was applied. Conclusions: In this study we demonstrated antiproliferative effects of Na[RuCl2(L1)2] and Na[Ru(L2)2]. At clinical level, these results could be interesting for further studies on anticancer potential of the ruthenium(III) complexes using animal models