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Alina Daniela Cojinovschi and Eugen Rusu

Abstract

The main dynamics that shaped the evolution of the forest surfaces between 1990 and 2012, in the county of Iaşi, are related to the legislative context and to the territorial reforms that affected the district limits. Analyzing these mechanisms in a geographical context shows that these trends are also related to the spatial frame. This study emphasizes that moderate negative coefficients of spatial and territorial autocorrelation can also describe these trends, suggesting that these evolutions are rather chaotic at local scale. This aspect makes us suspect that the loss of forest surfaces in each district is not only dependent on the economic, social and legislative context of the transition period, it is also subject to geographical factors. Analyzing these factors is the main intention of our study because they can provide us a better understanding of the extremely complicated frame of forest dynamics in the study area

Open access

Eugen Rusu and Alina-Daniela Cojinovschi

Abstract

The Romanian forest area in 2010 was 6,515 million ha, which represents approx. 27.3 % of the national territory. At European level, Romania is ranked 13 in the areas occupied by forests, but below the average forest coverage of 32 %. After a decline in forested areas recorded between 1990 and 2000 there was a slight rebound in the last decade, with an FAO estimated growth of over 30 000 ha per year between 2005 and 2011. This growth is primarily attributed to natural regenerations. If the production function is intrinsically provided in different proportions by all the functional categories, the protective function has a special attention, having clear typological distinctions, based on well-established natural or social components. Only maintenance work is allowed in protection forests. The total volume of timber harvested in Romania in 2010 was about 17 million m3, according to NFA upon reading the regeneration cuts of an area of over 99 hectares, 5000 ha of which by cuttings Compared to 2000, when they harvested less than 14 million m3, one can see a substantial increase of approx. 20 %. In the same period, in 2010, the total area of artificial regenerations was about 10 000 ha, which represents a tenth of the cutting surface, the remaining land being regenerated naturally.

Open access

Assan Gnoumou, Eugen Rusu, Adouabou Basile and Adjima Thiombiano

Abstract

In Burkina Faso, vegetation dynamic has been more influenced by human activities. Actually, the interest is focus on protected areas, which are more green areas and the last habitat for biodiversity. Conservation and restoration require a thorough understanding of the dynamic of each protected area and its surrounding zones. This study aim to analyze Comoé-léraba protected area vegetation spatial and temporal changed. For this study, we use satellite images taking account a period of twenty years (1990-2000-2009). Then the diachronic analysis considers globally and separately the land cover situation inside the protected zone and outside in the surrounding zone. As results, the diachronic study of Comoé-Léraba vegetation revealed significant changes. Some plant communities have remained intact; others were restored inside the protected area and against others suffered a severe deterioration. The vegetation degradation occurs, around and close to the protected area. During the twenty years 14.28 % of the natural vegetation has been loss, versus expanding fields and settlements. Beyond the obtained maps, an important data based is available. These results are important scientific stools which can support policy, conservationists and researchers for improving strategies of conservation in Comoé-Léraba zone.

Open access

Aura Rusu, Maria-Alexandra Sbanca, Nicoleta Todoran and Camil-Eugen Vari

Abstract

Objective: Letrozole is a highly potent oral nonsteroidal aromatase inhibitor triazole derivative. The aim of this study was to quantify letrozole from bulk, pharmaceutical formulation, and spiked urine samples by developing a simple, rapid and cost effective capillary electrophoresis method. Methods: A capillary zone electrophoresis method was optimized and validated. Additionally, an UV spectrophotometry method was used for comparing results. Results:The capillary zone electrophoresis method using a 90 mM sodium tetraborate background electrolyte proved to be an efficient method for determination of letrozole in a very short time, less than 2 minutes, using 20 kV voltage, 50 mbar/2 seconds pressure and 50°C temperature as optimum parameters. Additionally, the UV spectrophotometry method proved to be simple and efficient to quantify letrozole from bulk material and pharmaceutical formulation with linearity of response between 5 to 20 μg·mL-1 concentrations. For both methods, validation parameters, including linearity, detection and quantification limits were determined. Also we proved that our electrophoretic method has potential in analyzing letrozole from biological samples, obtaining encouraging results on estimation of letrozole from spiked urine samples without any special treatment. Conclusions: To quantify letrozole from bulk material, pharmaceutical preparations, and spiked urine samples the capillary zone electrophoresis method using a tetraborate sodium background electrolyte has proven to be simple and appropriate. Also a simple UV spectrophotometric method has been developed and validated for the same purposes.

Open access

Alina Daniela Brodner (Cojinovschi) and Eugen Rusu

Abstract

In the last few years, Romania’s forests have become one of the most interesting and most talked about topics for an increasing number of researchers from the most varied fields, both nationally and internationally. The present study aims at analyzing as accurately as possible the forests of Iasi County, especially forests with primary functions of protection, following the changes occurred after 1990 and the way these affected the functional framing of the forests and their state. This research has been accomplished based on precise statistical data collected from every region (or forestry district), these in turn being matched with maps, satellite images and aerial imagery.