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Articles by Lucia MIHALESCU
Total Records ( 6 ) for Lucia MIHALESCU
  Oana MARE ROSCA and Lucia MIHALESCU
  The hydrographic basin of the Sasar River is located in the North-Western part of Romania, and it totalizes 311 km2. A large part of the catchment basin is within the mining perimeter of Baia Mare; the Sasar River is its main drainage axis. Subsequent to the systematic studies of 2003-2006, 74 taxons were identified.
  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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