University of Shkodra

Shkodër, Albania

University of Shkodra

Shkodër, Albania
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Lukaj E.,University of Tirana | Vila F.,University of Tirana | Mandija F.,University of Shkodra
AIP Conference Proceedings | Year: 2016

Radon gases relased from building materials and from earth surface are the major responsibility of air ionization. Radon nuclear decay can produce an alpha particle with high energy and Radon progeny. This particle and gamma rays can deliver particles in the air and produce ions with different polarities. This ions, because of induced electric charge, can attach with air aerosols and charge them with their electric charge. The charged aerosols can interact with the other aerosols and ions. Because of this exchange, the air conductivity and the aerosol profiles will change dependently by Radon gas concentration and gamma radiation. Observations show an increase in concentration of Radon during the night, and a decrease during the daylight time. The Radon gas concentration changed hour by hour can induce aerosol profile to change. This dependency between the aerosol profiles and the Radon gas concentrations is discussed. © 2016 AIP Publishing LLC.

PubMed | Armenian National Academy of Sciences, Institute of Biodiversity and Ecosystem Research, Royal Botanic Gardens, Ukrainian Academy of Sciences and 67 more.
Type: | Journal: Biodiversity data journal | Year: 2015

Reliable taxonomy underpins communication in all of biology, not least nature conservation and sustainable use of ecosystem resources. The flexibility of taxonomic interpretations, however, presents a serious challenge for end-users of taxonomic concepts. Users need standardised and continuously harmonised taxonomic reference systems, as well as high-quality and complete taxonomic data sets, but these are generally lacking for non-specialists. The solution is in dynamic, expertly curated web-based taxonomic tools. The Pan-European Species-directories Infrastructure (PESI) worked to solve this key issue by providing a taxonomic e-infrastructure for Europe. It strengthened the relevant social (expertise) and information (standards, data and technical) capacities of five major community networks on taxonomic indexing in Europe, which is essential for proper biodiversity assessment and monitoring activities. The key objectives of PESI were: 1) standardisation in taxonomic reference systems, 2) enhancement of the quality and completeness of taxonomic data sets and 3) creation of integrated access to taxonomic information.This paper describes the results of PESI and its future prospects, including the involvement in major European biodiversity informatics initiatives and programs.

Neziri A.,University of Shkodra | Lazo P.,University of Tirana | Brummer J.,University of Portsmouth | Paschke A.,Helmholtz Center for Environmental Research
Journal of Environmental Protection and Ecology | Year: 2011

The determination of organic micropollutants and heavy metals in surface water is of ecotoxicological relevance due to their high toxic potential, their persistence and their tendency to bioaccumulate. New passive sampling devices for time-integrative monitoring of the dissolved and thus bioavailable fraction of these trace contaminants were tested in lake Shkodra. The membraneenclosed silicone collector (MESCO II), applicable for more hydrophobic organic pollutants were deployed at 3 different stations of the lake Shkodra. After retrieval of the samplers, the silicone rods (collecting phase) were analysed by thermodesorption - GC/MS. The time-weighted average (TWA) water concentrations of organic micropollutants were calculated using laboratory-derived sampling rates (A 1). The inorganic variant of the Chemcatcher® passive sampler was used to monitor heavy metal pollution at 3 different sites of the Shkodra lake. The extracts from the receiving phase of the exposed samplers were analysed for heavy metals using an AAS/ETA and ICP/MS methods. The water concentrations of Cd and Cu were calculated using the element-specific uptakes rates estimated for the prevailing field conditions.

Mandija F.,University of Shkodra
International Journal of Continuing Engineering Education and Life-Long Learning | Year: 2015

Estimating aerosol presence lets us evaluate the real situation of aerosol concentration as well as the contribution of principal sources in the region of Shkodra Lake. Several locations are selected in this measurement campaign; urban centre of Shkodra City and other minor rural centres around the perimeter of Shkodra Lake. In this campaign are monitored PMs number and mass concentrations of aerosol particles in these centres, and then are obtained conclusions about emission sources and transport mechanisms, which control the aerosol concentrations over these areas. The values of PMx concentrations in both locations are near the thresholds of international recommendations and sometimes exceed these limits, especially in the urban centre of Shkodra. Urban centre, nearest populated rural centres and traffic are the principal aerosol sources in this area. © 2015 Inderscience Enterprises Ltd.

Medja N.,University of Shkodra | Panariti E.,Agricultural University of Tirana
Journal of Environmental Protection and Ecology | Year: 2014

Cyanobacteria and their toxic products represent a serious problem in many waters. The aim of this study was to find out how crude extract of cyanobacteria can influence larval development of carassius on the base of embryo-larval toxicity test and to examine histological changes of tissues of carassius larvae exposed for 30 days to the crude extract of cyanobacteria. Tissue sections were stained with haematoxylin-eosin and examined using light microscopy. Changes of kidney, in particular, were examined. Crude extract of cyanobacteria, containing the known amount of microcystins LR, YR and RR (9.0 and 0.9 μg l-1, i.e. medium and low concentration of the extract), was administered to carassius eggs. The experiments were finished after 30 days. The extract with medium concentration caused an increase in malformed and dead larvae after 30 days exposure. The extract with low concentration caused an increase in dead larvae. No changes were found in the kidney.

Mandija F.,University of Shkodra | Ahmetaga S.,University of Shkodra | Vila F.,University of Tirana
AIP Conference Proceedings | Year: 2010

In this paper are presented the overall results of the atmospheric electricity monitoring on the Adriatic Seashore [1-4]. During this measurement campaign there are monitored continuously particularly two of these elements; the atmospheric ion concentration and the concentration of the aerosol particles of several dimensions. © 2009 American Institute of Physics.

Mandija F.,University of Shkodra
Journal of Materials and Environmental Science | Year: 2013

Aerosol mass concentrations, called PMx, are the key parameters of air quality index. The most measured mass concentrations are PM2.5 and PM10. Despite of this, nowadays exist many international and national limits on these two quantities. Recent studies focus the interest more on smaller aerosol modes (like PM1), as well as on aerosol number concentrations. In this study, we have focused our work on estimation of PMx concentrations over a wide geographical range; north - west of Albania. This region contains urban and rural centers, mountainous and remote areas, zones near Shkodra Lake and Adriatic Sea. Here we present average values of PM1, PM2.5 and PM10 concentrations over all above-mentioned areas. The results of this study give valuable information regarding on the air quality index in this region.

Preka J.,Regional Health Directorate | Bekteshi A.,University of Shkodra
Journal of Environmental Protection and Ecology | Year: 2016

Milk and milk products are important components of daily diet and are recommended for all ages. Shkoder region is well known for the production of milk in Albania. The aim of this research was to evaluate the possible contamination by heavy metals of milk from cows on various farms located in Shkoder region, north Albania. The concentrations of heavy metals were determined in 32 samples of cow milk from the various farms in Shkoder region, Albania. The milk samples were digested by the optimised microwave digestion method using HNO3 and H2O2. The concentrations of Fe, Cu, Cr, Zn and Mg were determined by Flame Atomic Absorption Spectrometer model Analytik Jena Nova A400. The concentrations of Fe, Cr, Cu, Zn and Mg varied within 0.33-4.12, 0.02-0.73, 0.004-0.59, 0.07-14.00 and 45.14-95.03 mg/l, respectively in the milk samples from Shkodra region. The concentrations of heavy metals observed were comparable with some of the reported values in literature.

Mandija F.,University of Shkodra | Vila F.,University of Tirana
Journal of Electrostatics | Year: 2013

One of the most important problems on the atmospheric studies is electrostatic interaction between atmospheric cluster ions and aerosol particles.Atmospheric ions are currently classified into 5 overlapping categories having mobilities ranging from 1.3cm2V-1s-1 to less than 0.004cm2V-1s-1.We have considered charged ultrafine aerosols and cluster ions as charged atmospheric particles. This classification can be used in the interpretation of electrostatic interactions among these particles.Attachment processes between ultrafine aerosols can be considered as recombination processes between charged atmospheric particles. Atmospheric particles are grouped into two categories, but the number of recombination and attachment coefficients is not reduced. © 2012 Elsevier B.V.

Electrostatic interactions among atmospheric particles like cluster ions and aerosols are of great interest nowadays in atmospheric studies. There are several models which describe this interaction. Recombination and attachment coefficients are expressed in terms of many environmental and particle properties. In this study are derived further simplified expressions of recombination and attachment coefficients between cluster ions and ultrafine aerosol particles. These expressions require the knowledge of only the ion and aerosol concentrations as well as the ion production rate. Thus the usage of these coefficients facilitates the elaboration of a balance equation, enabling the prediction of the evolution of ion and aerosol concentrations. © The Royal Society of Chemistry 2011.

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