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Articles by Monica MARIAN
Total Records ( 6 ) for Monica MARIAN
  Monica Marian , Leonard Mihaly Cozmuta , Camelia Varga , Anca Mihaly Cozmuta and Eugen Nour
  The present study followed an ecological demarche of reintegration in the scenary through revegetation of an anthropic ground, consisting in a waste pond formed from the flotation activity of non-ferrous ores. Problem statement: To support the formation of a compact vegetal layer, having anti-erosion and a restoration role, a preliminary study was required regarding the spontaneous settlement of different vegetal species. We had followed the specific floristic composition and biodiversity on the waste pond, manner of association of plant species and possible interactions with other species from the biocenosis (microorganisms and fungi). We had studied the pace at which vegetal species settle, as well as the reciprocal influence, from the point of view of vegetation, with the neighboring area, since the desideratum was the settlement of a vegetation similar to the natural one. Approach: The aim of the research was to draw a list of the vegetal taxa installed on the pond, as well as to detect some succession stages or some possible vegetal associations. We had established the share of different species in the vegetal layer on the waste pond through an analysis of ecological preferences, of the geographical origin of plant species, of the cariological and bioform profile. All this was done to compare the possible vegetal associations which settle on such anthropic grounds with the neighboring vegetation. The approach used was the classical one in fitosociology, recommended by the central European fit sociological school adapted to the pedo-climatic conditions in Romania. Results: Over 50 species of plants and fungi spontaneously settled had been listed and we had followed their association as well as their distribution, compared to the microclimatic conditions of the waste pond. We had distinguished species with a large potential of revegetating highly polluted with heavy metals waste ponds and sites. Conclusion/Recommendations: Starting from this study, we may establish a formula of sustaining the vegetation and using the interactions among species in order to stimulate the settlement of dense vegetation, which might ensure anti-erosion protection and landscape integration.
  Lucia MIHALESCU , Oana MARE ROSCA , Monica MARIAN and Mirela CORDEA
  Not available
  Lucia MIHALESCU , Oana MARE ROSCA , Monica MARIAN , Zorica VOSGAN , Aurel MAXIM and Mirela CORDEA
  In this paper the influence of iron in different concentrations of FeCl3 solution on the respiration of corn (Zea mays) seedlings was observed. The following variants were used: V1 — as control, V2 = 0.1%FeCl3, V3 = 0.5%FeCl3, V4= 1%FeCl3. The respiration intensity of the 4 variants was determined applying the confined atmosphere procedure (Boysen-Jensen). This is a method based on determining the quantity of produced CO2. In case of this procedure, the contact between vegetal material and atmosphere takes place in a closed recipient, in which CO2 - resulted from respiration — is fixed by a solution of Ba(OH)2. An increase of the respiration intensity was noted, proportional with the increase of the administered FeCl3 solution concentration. Iron ion enters in the structure of cytochromes, which are components of the respiratory chain. Its presence in the growing environment of the corn seedlings led to the respiration increase. The intensity increase quickly evolves with low concentrations of iron, for example the variant with a concentration of 0.1% salt of FeCl3, for which it increased with 184% compared to the control, as the increase intensifies at concentrations of 0.5% with 259%. We note that in the last case, when iron is in the highest concentration of 1%FeCl3, the increase is no more so heightened, as it is higher with only 128% versus the previous variant. Iron highly stimulates the respiration up to a certain concentration, it was remarked.
  Zorica VOSGAN , Roxana VIDICAN , Stela JELEA , Monica MARIAN , Lucia MIHALESCU and Oana MARE ROSCA
  This study has been carried out in a pastoral area of Maramures County, on the south-estic slope of Gutai Mountain, where it is situated the pasture for the ovines and caprines of the inhabitants of the surrounding villages. It has been identified in this area a districambosol soil characterized by high acidity, a composition rich in nitrogen and humus due to slow humification, moderate reserves of potassium and phosphor. The assay indicates a clayey composition except for the At horizon which has a composition predominant in fine sand. In order to increase the value of the pasture, improvement and maintainance works should be performed.
  Lucia MIHALESCU , Oana MARE ROSCA , Monica MARIAN , Zorica VOSGAN , Aurel MAXIM and Mirela CORDEA
  Possible influence of lead on germination was studied, in the carried out experiences. The corn caryopses were soaked in solutions of PbCl2 of different concentrations, for 2 hours. For each variant 30 caryopses were used; they were put into germinators where they were wetted with the corresponding solutions. It was noted that lead, in small quantities, produces the stimulation of germination of about 10-20%, and in high quantities a decrease with 66% due to the inhibition of cells division and cells elongation, too.
  Zorica VOSGAN , Roxana VIDICAN , Monica MARIAN , Lucia MIHALESCU , Stela JELEA and Oana MARE ROSCA
  This study aims to investigate and identify plant species on the village common grazing Surdesti, located at 760 m altitude in the foothills south west of Gutai Mountains in northwestern Romania. Green growth of plants and animals is the main activity of the inhabitants of this area and food production is made using environmentally friendly technologies and natural life cycle of the ecosystem. It is important to know the qualitative composition of grassland vegetation as the main source of feed for cattle, sheep, goats.
 
 
 
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