Ecoterra, No. 24, pp. 3-5, 2010
Cristina RUSU, Radu Mihai DAMIAN, Ovidiu Paul CIOANCĂ, Claudiu GAVRILOAIE
Colegiul Tehnic ,,Infoel” Bistriţa
Abstract: Colibiţa lake, the largest lake from Bistriţa-Năsăud county, has a special place in the economy of the county, being used as a water supplyer for the down-stream villages, including Bistriţa, as an electricity supplyer and for touristic purposes. This lake, with a surface of 300 hectares was built by the blocking of the Transylvanian Bistriţa river, a second degree affluent of the Someşul Mare river. The quality of Colibiţa lake’s water is monitored by The System of Management of the Bistriţa-Năsăud waters, therefore, before arriving in the locals’places, the water of the lake is treated in the stations from Bistriţa Bârgăului and Bistriţa, the specialists from these three institutions assuring us that the lake has first class drinking water. During our research, we have got accustomed to the checking system of the lake’s waters, we observed the quality of the water, we analysed it in the SMW laboratory and we organised a trip for our school’s students, in which we combined the cleaning of the right lakeside, but also the spending of some hours in the middle of a magnificent scenery.
Key words: Lake Colibiţa, River Bistriţa, The Sistem of Management of the Bistriţa-Năsăud waters, SMW laboratory, first class drinking water
Ecoterra, No. 24, pp. 6-7, 2010
University of Miskolc, Department of Geography
University of Pécs, Institut of Geography
Abstract: Settlement system of this region had developed under the given natural circumstances in the western part of the Transylvanian Basin. Most of the settlements from the mouth region of the Arieş river had already been mentioned in 1291. They were situated mainly in valleys in the western part of the investigated area. Towns developed in the valleys of the Arieş and Mureş rivers. During centuries administrative reorganizations were realized in function of socio-economic, demographic and political factors. Agricultural utilisation of lands had developed from the alluvial flats of the river to interfluves.
Key words: settlements system, population, landscape modifying
Ecoterra, No. 24, pp. 8-9, 2010
Universitatea din Miskolc, Departamentul de Geografie
Universitatea din Pécs, Institutul de Geografie
Abstract: The negative effects of human activities could be felt in economic recession: degradation of soil quality and its productivity decrease. Parallel with these processes, geoecological components and relations between them had strengthened. Processes caused by them had been modified, changed and declined. Studying these features: relations between geoecological components, knowledge and analysis of processes evoked by them, we can explore the reasons of these changes and afford possibility to lessen and eliminate the negative effects. The disadvantageous natural features strenghten the specific economic and social processes. Nowdays the area of Simoneşti village is characterized by firm agricultural character, low productivity, few forests, aging and decreasing population.
Key words: landscape modifying, deforestation, settlements
Ecoterra, No. 24, pp. 10-11, 2010
Dan Constantin NIŢĂ, Constantin COSMA, Mircea MOLDOVAN, Papp BOTOND
Universitatea Babeş-Bolyai din Cluj-Napoca, Facultatea de Ştiinţa Mediului
Abstract: One of the most prominent component of natural radioactivity is radon. The radiation produced by the decay of radon atoms and its daughters, that are also radioactive elements, creates a significant natural hazard and it poses a serious health risk. Cluj area measurements show relatively high concentrations of radon; therefore the detection and monitoring of areas with high concentrations of radon are very important.
Key words: radon, soil, radioactivity, natural hazard, Cluj
Ecoterra, No. 24, pp. 12-13, 2010
Larisa FLORESCU, Mirela MOLDOVEANU
Institutul de Biologie al Academiei Române
Abstract: The purpose of this paper is to present a critical analysis of current state of knowledge over time investigations on phytoplankton and zooplankton community ecology from Romanian waters. Long time research brought a significant contribution to knowledge of planktonic communities and represented the current environmental research development. Planktonic communities are important both for their functionality in the food web of aquatic ecosystems and specific diversity they hold.
Key words: plankton, environment, biodiversity, ecology, research
Ecoterra, No. 24, pp. 14-16, 2010
Institutul Naţional de Cercetare Dezvoltare pentru Inginerie Electrică ICPE-CA, Bucureşti
Institutul Naţional de Cercetare Dezvoltare pentru Textile şi Pielărie, Bucureşti
Institutul Naţional de Cercetare Dezvoltare pentru Inginerie Electrică ICPE-CA, Bucureşti
Institutul Naţional de Cercetare pentru Conservare şi Restaurare, Bucureşti
Abstract: Microscopic fungi have a very important role in the biodegradation of the heritage parchments. Four types of parchments (noted 1, M2, 3V, and 4A) made of lamb and calf leathers, the first three from Bucharest and the last one from the Torino State Archives (19th century), were analyzed from the point of view of the biological load. The Petri boxes with samples of parchment were placed on a surface of Czapek-Dox agar nutrient for the isolation of fungi. The plates with the parchment were kept at a temperature of about 30°C and a 90 % relative humidity for 42 days. These are highly favorable conditions for the growth of molds. After a certain incubation period in a thermostat with the proper humidity, the samples were examined with a stereomicroscope of 50 x magnitude (after 3, 10, 15, 21, 35 and 42 days). Pure cultures for fungal identification were prepared from the isolated colonies. The obtained data showed that all the parchment samples have a rich mold load in saprophytic fungi. Thus, 26 species of microorganisms were isolated and 19 fungal strains were identified, as far as the species or at least the genus is concerned. The principal effects of the parchments biodegradation, due to the colonization by the fungi, consist in the appearance of many stains, holes, and a certain friability of the parchments. For example, the colonies of Alternaria, Cladosporium and Penicillium caused dark green stains on a parchment sample made of lamb leather (M2). Also, we observed on the surface of another sample (sample 1) the presence of Chaetomium perithecies, which is a cellulose decomposing fungus.
Keys word: fungus, biodegradation, parchment
Ecoterra, No. 24, pp. 17-19, 2010
Adrian Vasile RUS
Regia Naţională a Pădurilor ROMSILVA, Direcţia Silvică Bistriţa-Năsăud
Abstract: The paper presents technological aspects of the zoning of the land under study, represented by the mountaineous area of Tibles Mountains and precisely Izvorul Bailor-Borcut basin from the teritory of Beclean Forestry. The paper also focuses on issues related to improvement of wood exploitation technological structures exploitation in the stands covered with works by thinning. Exploitation of wood, as industrial production process, it can progress only through continuous growth of technical performances, reflected positively in labor productivity (Ionaşcu et al. 2006). Must not neglect the economic aspect of the timber exploitation technological process and the forest-environmental side should also be considered when a technological structure is accomplished.
Key words: technology, exploitation, wood, stand, thinning
Ecoterra, No. 24, p. 20, 2010
Oficiul pentru Ameliorare şi Reproducţie în Zootehnie - Mureş
Abstract:. The future of the aviculture must be viewed in two ways: we must take into account the areas with well developed aviculture, where the fodder supplies are assured, against the regions with developing aviculture, where fodder supplies are less assured. It is possible the future evolution of the aviculture to be different from a region to another. We have to mention that in the future, in chickens food will be used increasingly natural plants, spices and biological active substances and decreasingly industrial fodders. This will lead to a decreasing negative impact upon the environment.
Key words: aviculture, chicken, fodders, microorganisms, consumer
Ecoterra, No. 24, pp. 22-23, 2010
„Francisc I. Rainer” Anthropological Institute, Romanian Academy
Independent researcher, Sousse - M
Abstract. The aim of this article is to examine the nutritional status and some biochemical plasmatic parameters (like glycemia and cholesterolemia) in a sample of 84 omnivorous subjects (52 women and 32 men) from an urban environment. Their weight, height, plasmatic glycemia and cholesterolemia (in the morning) were measured. For the entire sample the mean value of body mass index (BMI) was 25.42 kg/m2, of glycemia was 78.07 mg/dl and of cholesterolemia 78.79 mg/dl. The Bravais-Pearson correlation index between glycemia and BMI values was 0.348 (p<0.01) and between cholesterolemia and BMI was 0.158 (p>0.05).
Key Words: nutritional status, glycemia, cholesterolemia, omnivorous subjects
Ecoterra, No. 24, pp. 24-27, 2010
Colegiul Tehnic INFOEL Bistriţa
S.C. ICPE Bistriţa S.A.
Universitatea din Miskolc, Departamentul de Geografie, Ungaria
Abstract: In both the rivulet and the thermal lake Peţea from Băile 1 Mai, Bihor county, there are several plant and animal species protected at European level. In this paper we will discuss only about the ichthyofauna from this area. Here,there were observed in a long period of time, from 1861 until 2010, 27 fish species belonging to 23 genra and 5 families. One species is endemic here (Scardinius racovitzai), 15 are native, 3 are alien species entered here through natural water courses, and, finally, 8 are ornamental fish species usually kept in aquaria. Due to relative neighbourhood of this protected area with human settlements, all the fish species are permanently exposed to anthropic impact, but of major concern is, of course, the thermal rudd, S. racovitzai.
Key words: native species, ornamental fish, Peţea, introduction, Scardinius racovitzai
Ecoterra, No. 24, pp. 28-29, 2010
Universitatea TRANSILVANIA Braşov
S.C. ICPE Bistriţa S.A.
Abstract: Due to industrial activities and also to fossile combustible consumption, thequantity of carbon bioxide released in the atmosphere in continuously increasing. It is known that the emission of the carbon bioxide in the atmosphere is related with combustible consumption. This article presents two methods for carbon bioxide reduction from the present-day motor vehicles. These methods have as the main purpose to increase the safety of the usage of the cars, but they also insure the fuel economy.
Key words: fossile combustible, carbon bioxide, ties pressure
Ecoterra, No. 24, pp. 30-33, 2010
Alin GRAMA, Dorin PETREUŞ
Universitatea Tehnică din Cluj-Napoca, Facultatea de Electronică, Telecomunicaţii şi Tehnologia Informaţiei
Abstract: This paper presents the practical implementation of a plasma generator. This aparatus is capable to generate plasma in air atmosphere at low pressure and low temperature. This device in conjunction with a spectrometer analyser is a usefull tool that can be used to determine the chemical composition of earth probe. Because the earth probes must be taken from different sites, the aparatus must to be mobile, low weigth and low power consumption. The electronic solution to generate plasma is a class E power amplifier. The paper presents the advantages and disadvantages of this kind of circuit, and the solutions used to eliminate this disadvantages. The most important disadvantages of class E power amplifier for our application is that the load impedance of the amplifier must do not vary more then 10 %, but the equivalent impedance of plasma vary from a very high impedance to aproximatively 110kΩ-200kΩ. The proposed solution is to use a magnetic amplifier that realise an impedance matching between output impedance of power amplifier and equivalent impedance of plasma, and also increase the output voltage to the value needed to obtain plasma.
Keywords: plasma, class E power amplifier, magnetic amplifier
Ecoterra, No. 24, pp. 34-35, 2010
Andor KÖMIVES, Theo MUREŞAN
University of Art and Design, Cluj-Napoca, Romania
“Nicolae Titulescu” School in Cluj-Napoca
Abstract: The Urban birds project is a challenge for children to reuse waste products in an aesthetical manner, creating a series of urban birds whose song or cry for a cleaner environment can be heard by both children and adults. Fifteen pupils from “Nicolae Titulescu” School and a number of artists teaching at the University of Art and Design in Cluj-Napoca have been invited to take part in the project with 2-3 works each, created in all techniques. The French Cultural Center in Cluj, a true cultural focus in the area, has been requested support in the promotion and media coverage of the event. The idea of this project was born from the fear that one day we might no longer see or hear birds singing, as it happens in other civilized areas, where birds are on the brink of extinction due to pollution and pesticides. Then, one might only be able to hear the delicate song of a bird on the internet, the You Tube, on Animal Planet, or by playing with some mechanical toy. The urban world is marked by artificiality, surrogates, and consumerism. The natural is perverted and genetically modified, and our soul (another symbolism of birds) risks being alienated and suffocated by urban excess. The reception of a work entitled Urban Bird, made of recycled materials, placed directly on the ground, is perverted by its material condition itself. Thus, the object seems to be rather a refuse object, negligently thrown on the ground, than a work of art. Once suspended in mid air, the work floats, becomes spiritualized, and is imbued with something of the essence of birds, setting itself free from the refuse material. The project, with both ecological and artistic goals, was finalized through the creation of two exhibitions of “urban birds” presented as installations and through performances.
Key words: urban, artificial, waste materials, recycling, installation, exhibition