Volume 19 (2010)
Articles
BIOLOGICAL AND ECOLOGICAL PECULIARITES OF BEAN WEEVIL (ACANTHOSCELIDES OBTECTUS SAY.) - A BASIS AS AN ALTERNATIVE HOST FOR BREEDING OF OVIPARASITE USCANA SENEX G.
L.VOLOSCIUC, V. BRADOWSKY., N. BRADOWSKY, V.VOINEAC, T. NASTAS
The laboratory regulations of Uscana senex rearing includes the reproduction of Acanthoscelides obtectus as a secondary host, based on Belitzcaia-16 bean sort wich provides a high female’s biological potential, presenting a high viability and prolificacy and a large quantity of individuals obtained from a substratum unit.
MINIMUM CRITERIA OF THE HYDROMORPHOLOGICAL PARAMETERS NECESSARY TO PROTECT THE AQUATIC ECOSYSTEMS OF RIVERS
DAN DĂSCĂLIŢA
A very important step in the complex process of environmental reconstruction is to ensure the flow of environmental protection along water courses (flow protection of aquatic ecosystems) and the minimum flow required in any section of a watercourse river, to ensure natural conditions of life of existing ecosystems and future. In this context, the paper aims to present some of hydromorphological requirements, including compliance protection flow of aquatic ecosystems, which the water courses must meet in order to achieve requirements established by the Framework Directive 60/2000/CEE for the good ecological status of water bodies.
OBSERVATIONS REGARDING THE VARIATION OF PHYSICAL-CHEMICAL AND BIOLOGICAL CLASSES OF QUALITY OF UZ RIVER
DELIA GHEORGHE, FLORIAN PRISECARU
The river Uz is one of the main affluent of Trotus River and especially of the superior basin of Trotus river. On this range on find the accumulation Poiana Uzului, an accumulation lake utilized for the alimentation with water of cities Bacau, Darmanesti, Comanesti, Tg Ocna and other. In the same time in the hydrographic basin of Uz River on find different protected areas, for example scientific reservations with local importance (Bolatau Lake or Izvorul Alb), or protected areas from Nature 2000 network, the site with communitary importance Creasta Nemirei. As a result of studies accomplished during many years the entire Uz River can be classified as being in a very good ecological state, both from biological and physical-chemical point of view, with a low pollution degree. In the section upstream of Poiana Uzului Lake the waters of Uz Piver have a very low degree of pollution due to the fact that in the upstream area of poiana Uzului accumulation lake there are nor antropic sources of pollution or natural sources of pollution. The section downstream of Poiana Uzului Lake, due to the hydro-morphogical alterations due to the presence of the accumulation lake, that impress a strongly modified character, on observed that the aquatic ecosystem is not significantly changed. Thus on conclude that the downstream section can also be classified as being in a very good ecological state. Still in the conditions imposed by the Cadre Directive regarding the Water 60/2000 EC, the area situated between the sections upstream and downstream of Poiana Uzului Lake, from hydro-morphological point of view, represents a sector of water strongly modified.
NEEMAZAL-T/S - REGISTRATION SITUATION IN EU AND OTHER METHODS OF APPLICATION
EDMUND HUMMEL, HUBERTUS KLEEBERG
The registration of NeemAzal-T/S will end on 31th of December. A new dossier for the next 10 year is prepared. It is possible to use of this formulation as the bait, soil and hydroponic application, as a drip irrigation and the stem injection too.
THE EFFECTS OF ANTHROPIC ACTIVITY ON ICHTYOFAUNA DIVERSITY IN SOME RESERVOIRS OF THE BISTRIŢA RIVER
FERDIN, PRICOPE, IONUŢ STOICA, KLAUS WERNER BATTES
The paper presents the modification of the ichtyofauna structure from the Bistriṭa River basin under the influence of hydrotechnical works, through the quantitative and qualitative monitoring of the piscicultural fauna of four reservoirs built along this river (Pângăraţi, Bâtca Doamnei, Lilieci and Racova). In determining the ecological significance index (W), we have established the structure of the fish populations from these reservoirs. The calculation of the index of biological integrity (IBI) of the fish communities has permitted emphasizing the anthropic effect on these aquatic ecosystems.
OBSERVATIONS REGARDING THE GROWTH IN CAPTIVITY OF WOLF-SPIDER SPECIE LYCOSA SINGORIENSIS (LAXMANN, 1770)
MARIA PRISECARU, ALIN IOSOB, OANA TINA CRISTEA
The following observations were accomplished, regarding the growth in captivity of Lycosa singoriensis specie (Laxmann, 1770) – wolf-spider: reproduction, cocoon overlay, cub apparition, hair shed, development of cubs after hair shed, biological cycle, feeding, behaviour. We obtained several generations of cubs, most of them were set free in nature and we also established the optimal growth conditions in terrariums. The study can contribute to the knowledge and conservation of this endangered specie.
A STUDY ON THE INFLUENCE OF PINE EXTRACT UPON THE AIR MICROFLORA FROM DIFFERENT SPACES, USING THE MATHEMATICAL MODELISATION OF FACTORIAL TYPE
A. GRĂDINARU (CIOBANU), D. MANEA (RĂDUCANU), I.D. NISTOR, N.D. MIRON, GH. BRABIE
In this paper, there is tested the influence of pine extract (needles) on the microbiota air from different enclosures: industrial hall, toilet and university yard. The achievement of this study is necessary because the complex microbiota (bacteria, yeasts, molds spores, fungi) in the air have epidemediologically regulated standards (quantitative and qualitative). The microbiological analysis of the air, in the three spaces, is made according to the Koch method (method of air sedimentation). The calculation of NTG (the total number of germs) is achieved using the formula of Omeleanski. The experiment was conducted during spring time (15-22.03.2009), using the factorial program of type 33. The mathematical modeling of factorial type 33 involves a set of 27 experiments and three additional experiments used as approval samples. (Nistor I.D.). We considered three levels of variation, as follows: amount of extract (ml);pH of environment of culture medium; time of exposure (minutes).
DETERMINING THE CONCENTRATION OF METHANOL FROM NATURAL DISTILLATE
DOINA MOALES, ADRIAN FLORIN SPAC, MARIA PRISECARU, ELENA BUTNARU
The study was done on 98 samples of brandy and plum brandy taken from Moldavia between 2007 and 2009, to determine the methanol concentration from the natural distillates. The samples were analyzed using an Agilent Technologies 7890 chromatography gas coupled with an Agilent Technologies 5975 C mass spectrometer, the mobile phase being represented by helium and the stationary phase by a Zebron – Phenomenex ZB- WAX plus chromatography column. Out of the 98 samples of brandy, 19 had a higher concentration of methanol than the working standards. The methanol concentration was related to 100 ml anhydrous ethanol. Depending on the material from which it was treated, the fruit mixture brandy represents 42% from the share of the samples with an exceeded methanol concentration, the marc 32% and the plum brandy 26%. The place where the most samples with an exceeded methanol concentration can be found is Comanesti- Bacau, followed by Blagesti - Bacau and Straoanu - Bacau.
USE OF SYNTHETIC PHEROMONES FOR SEQUENTIAL MONITORING OF PLUTELLA XYLOSTELLA L. SPECIE IN SUMMER CABBAGE
CĂLIN MARIA, MARIA FENEŞAN, CRISTEA TINA OANA, SILVIA AMBĂRUŞ, DAN IOAN ¬ AVASILOAIEI , CREOLA BREZEANU, P.M. BREZEANU
Experiments were carried out at Vegetable Research and Development Station Bacau during 2008 – 2010. Four species of pests were caught in 2008 with variant of pheromone trap Var. 2009: Mamestra brassicae L., Discestra trifolii H., Autographa gamma L. and Agrotis spp. Most of the captures belonged to diamondback moth specie, in variant V1 - Mb – 2008 – 1.5 males/trap. The flight of pests started in the second part of May, the maximum of curve being registered in the third decade of this month. At the beginning of June the male flight finished, the diamondback moth was still present in cabbage crops but only in larva stage. In 2009 the population of diamondback moth was under Economical Damage Level (EDTA). In 2010 the flight started in the third decade of May and finished in early June. Two noctuide species were caught: Mamestra brassicae L. and Discestra trifolii H. Most of the catches belonged to diamondback moth specie. The results obtained demonstrate the good efficacy of the new synthesized pheromone variants - Var. 2009.
DETERMINING THE CONCENTRATION OF ALCOHOL FROM THE NATURAL DISTILLATES
DOINA MOALES, ADRIAN FLORIN SPAC, MARIA PRISECARU, ELENA BUTNARU
The natural distillates that were studied have been taken from Moldavia between 2007 and 2008. The 98 samples represent products that resulted after the distillation of the mixture of fruit maceration extract (apples, pears, plums, grapes), simple plum or grape maceration extracts (marc). These distillates are found all around the area, the recipes that are used are personal and thus they have a traditional character. In order to determine the alcoholic concentration in volumes, the pycnometer method was used, a method that is accepted by the laws in force. The relative density and the real relative density were calculated, and based on the results the values of ethanol concentrations in volumes were obtained. There were values from 10.9% to 69.8%. The values of ethanol concentration for each batch of distillates were calculated according to the material they were treated from. The general average value of the ethanol concentration in volume percentage is of 41.7.
THE MONITORING OF CABBAGE MOTH – MAMESTRA BRASSICAE L. IN SUMMER CABBAGE
MARIA CĂLIN, MARIA FENEŞAN, TINA OANA CRISTEA, SILVIA AMBĂRUŞ, DAN¬ IOAN AVASILOAIEI, CREOLA BREZEANU, PETRE MARIAN BREZEANU
Experiments were carried out at Vegetable Research and Development Station Bacau during 2008 – 2010. Four species of pests were caught in 2008 in variants with pheromone trap Mb 2008: Mamestra brassicae L., Discestra trifolii H., Autographa gamma L. and Agrotis spp. Most of the captures belonged to cabbage moth specie, in variant V1 - Mb – 2008 – 1.5 males/trap. The flight of pests started in the second part of May, the maximum of curve being registered in the third decade of this month. At the beginning of June the male flight finished, the cabbage moth being present in cabbage crops only in larva stage. In 2009 the population of cabbage moth was under Economical Damage Level (EDTA). In 2010 the flight started in the third decade of May and it finished in early June. Two noctuide species were caught: Mamestra brassicae L. and Discestra trifolii H. Most of the catches belonged to cabbage moth specie. The results obtained demonstrate the efficacy of the new synthesized pheromone variants - Mb 2008.
PRELIMINARY STUDIES REGARDING CELL DENSITY AND TEMPORAL DYNAMICS OF BACTERIAL BIOFILMS FORMED AT LIQUID - SEDIMENT INTEFACE USING BRIGHT FIELD AND EPIFLUORESCENCE MICROSCOPY
AURELIA MANUELA MOLDOVEANU
The biofilms represent communities of prokaryotes and eukaryotes that are formed in different types of hydrophile and hydrophobe surfaces determining the occurrence of microfouling, biocorrosion and the reduction of materials efficiency. The generation of biofilms was accomplished based on a comparative study using seawater as culture medium and glass slides as artificial support for the adherent cells. Only three days after the immersion of the artificial substrate, a dense layer of cells is formed on the hydrophile surface of glass and 15-18 days. later, depending on the thickness of the biofilm, detachment and dispersion phenomena occur. The formation of biofilms in static conditions occurs more quickly from density of 11∙102 cel/mm2 to 74∙102 cel/mm2 for the sea water and sediment area separate by the interface. This information was obtained nondestructively, quasisimultaneously, and in real time, thereby permitting the verification of time-dependent relationships between the biofilms population structure, distribution, and interfacial chemistry. The approach offers opportunities to examine these relationships on a variety of substrata in the presence of a bulk aqueous phase under controlled hydrodynamic conditions.
THE CONSERVATION AND DECLINE PREVENTION OF SPECIE HYLA ARBOREA (LINNEAEUS, 1758) – THE EUROPEAN TREE FROG – THROUGH ITS GROWTH IN CAPTIVITY
MARIA PRISECARU, ALIN IOSOB, OANA TINA CRISTEA
Two pairs of Hyla arborea L.-green frog were bred in captivity in order to discover different aspects regarding: copulation, eggs overlay, embryo development, metamorphosis, feeding, and behaviour. We manage to establish the optimum growth conditions in captivity and we made recommendations regarding the terraristic. The study can contribute to the knowledge and conservation of this endangered specie.
WATER MITES (ACARI, HYDRACHNIDIA) FROM THE VÂNĂTORI NEAMŢ NATURE PARK (ROMANIA)
IULIAN BOBOESCU, LUCIAN PÂRVULESCU, RĂZVAN DEJU
The list of the water mite species found in Romania is still incomplete. This is because of the interruption of the studies that had taken place in this country, especially in the first part of the 20-th century regarding the water mite distribution and ecology. This paper offers a presentation of the water mite fauna from the rivers situated in the Vânători Neamţ Natural Park area, as well as a glimpse on the differences in ecology tolerance ranges of the identified water mite taxa. We used qualitative sampling to obtain specimens required for systematic studies. Several general physico-chemical indicators were also measured in each of the sampling stations: thermal conditions, pH, oxygenation conditions given by dissolved oxygen depletion (DO depletion), Total Dissolved Salts (TDS), salinity, dissolved inorganic nitrogen forms (N-ammonium, N-nitrite and N-nitrate) and soluble reactive phosphorous (SRP). The results obtained offers a glimpse over the biodiversity of the water mites collected from the studied area, as well as some strong correlations among the measured physico-chemical parameters and the presence or absence of the identified water mite taxa.
HETEROSIS AND COMBINING ABILITY FOR QUANTITATIVE BLUE MOULD (PERONOSPORA TABACINA ADAM) RESISTANCE IN TOBACCO
BELUL GIXHARI, HEKURAN VRAPI, VALBONA HOBDARI
In this study, the estimation of heterosis and the combining abilities for quantitative resistance against Blue Mould (Peronospora tabacina Adam) of eight oriental tobacco cultivars are presented. For this purpose, a half-diallel cross and its parents were arranged in four replications of a randomized block design. Symptoms of natural infestation of disease were observed and evaluated acording to CORESTA-methodology, during three years. From the data presented on the combining ability and heterosis for quantitative Blue mould (Peronospora tabacina Adam) resistance in oriental tobacco, the following statements might be drawn: - Significant general combining ability (GCA) was found, whereas the specific combining ability (SCA) was significant only in some individual crosses, and a great part of the general combining ability could be explained by variety effects. Significant variety heterosis was obtained too, and significant average heterosis was also obtained, but its effect was small. - Among those selected for this study, "Bel 61-9’’ and ‘’Hicks- Rezistent" were the best for further crosses for tobacco resistance against P. tabacina Adam.
PERSPECTIVES ON INTERSPECIFIC AND INTRASPECIFIC INTERACTIONS IN ACADEMIC COMMUNITIES
NADIA NICOLETA MORĂRAŞU
This article proposes a topic that has seldom been investigated by other specialists than biologists, behaviourists, psychologists, sociologists and anthropologists. It is a daring attempt at offering an inter- and transdisciplinary perspective on the types of interactions manifested in the academic environment (between faculty members, between professors and students, between teaching staff and representatives of other university departments etc.). To this purpose, we combine the scientific conceptual framework of inter- and intraspecific relations, human vs. animal behaviour and social behaviour with the conceptual domains, representations and mappings of metaphors which are analysed with cognitive linguistic tools.