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Membrane enzymes as possible biosenzor for lead monitoring in water
1997
Nikezic, G. (Institut za nuklearne nauke Vinca, Beograd (Yugoslavia). Laboratorija za molekularnu biologiju i endokrinologiju) | Horvat, A. | Todorovic, S. | Vasic, V. | Vujisic, Lj.
In our earlier work, we have shown that enzymes from rat brain synaptosomal membranes, Na(+)/K(+)-ATPase and Mg(2+)-ATPase, are promising biological components of a biosensor for lead detection. In this work, we represent our results of investigation with the same enzymes as biological components for the biosensor in presence of Hg(2+) ions in water. It was established that IC50 for Na(+)/K(+)-ATPase and Mg(2+)-ATPase is 6.9 and 5.5 x 10E-6 M, and the percentages of inhibition are 96% and 77% respectively. We concluded that these enzymes could be the base for developing biosensors for the presence of Hg(2+) ion in water. Since these enzymes maintain a stable activity for a longer period of time, they could be appropriate as components of biosensors for monitoring water quality.
Show more [+] Less [-]Algological and saprobiological analysis of the river Dulenska [Serbia, Yugoslavia]
1997
Rankovic, B. | Simic, S. (Prirodno-matematicki fakultet, Kragujevac (Yugoslavia). Institut za biologiju)
During hydrobiological investigations of the river Dulenska (Serbia, Yugoslavia) in June 1996, algological samples were taken at this river. In the algae community are found 34 taxa from two divisio: Bacillariophyta (28) and Chlorophyta (6). While qualitative composition of the algae colony was relativelly uniformed quantitative one was changeable along the course of the Dulenska river. By saprobiological analysis, it was found that the quality of water was changing along the course of the river. At the upper and middle course of river the water belonging to the second class. At lower course of the river (below Rekovac) water quality was getfing worse and it belonging to the third class.
Show more [+] Less [-]Quality changes of aquifer a relating to plant production
1997
Belic, S. (Poljoprivredni fakultet, Novi Sad (Yugoslavia). Institut za uredjenje voda) | Belic, A. | Bugarski, R.
Neither soil nor water has very distinct function when seen in isolation. Therefore, analyses of water and soil can get real value only by their linkages. Taking into consideration irrigated land, water and soil interaction degree can cause different changes of soil, plants and aquifer A. All negative changes which are occur in the soil (in case of using unsuitable water quality for irrigation or applying of not rational fertilizers amount) have influence to the changes aquifer A quality. Interaction between soil and aquifer A are require investigation of groundwater quality changes relating to plant production, especially in irrigation. Intensity and type of aquifer A properties change, in case of different soil use in agricultural production, have been studying since 1991 at the Lysimetric Station Rimski Sancevi (Serbia, Yugoslavia). The results are point out satisfactory quality of aquifer A after irrigation with wastewater and well water, and applying of different mineral fertilizers amount. The soil capability to receive water with unsuitable quality, to influence their change and change of aquifer A quality as the final recipient, are showed by received results.
Show more [+] Less [-]Mineralization exchange of the Danube water [Serbia, Yugoslavia]
1997
Savic, R. | Belic, S. (Poljoprivredni fakultet, Novi Sad (Yugoslavia). Institut za uredjenje voda)
Nowadays, different profile of experts are present opinion that surface water quality are exchanged. Type and degree of mineralization content exchange are shown by argumentation. The work have carried out taking into consideration suitability of Danube water for irrigation. The results of chemical investigation from three sample locations (Bezdan, Novi Sad and Banatska Palanka), Serbia (Yugoslavia) during the period 1981-1995, were analyzed. The main statistical parameters and tests of homogeneity are used during the work. Results have pointed put more or less concentration decreasing of analyzed parameters. From statistical point of view, exchange of electrical conductivity and potassium are prominent on all three localities.
Show more [+] Less [-]The river Tara [Montenegro, Yugoslavia]: water quality, state, problems, protection
1997
Djuraskovic, P.N. | Pejovic, M. (Republicki hidrometeoroloski zavod, Podgorica (Yugoslavia))
The river Tara (Montenegro, Yugoslavia) is under the treatment of the international (UNESCO) and domestic legal protection, so the prescribed quality of its water is the 1st class. Permanent measurement of the water quality of this river shows that due to the influence of the human factor, its quality has been endangered. Examination of the data collected through many years at all the measurement station along its current shows that the quality of water and pollution estimate have changed.
Show more [+] Less [-]Survey of aquatic macrophytes and estimate of water quality of the lake Provala [Serbia, Yugoslavia]
2001
Stojanovic, S. | Popovic, M. | Nikolic, Lj. | Malencic, Dj. (Poljoprivredni fakultet, Novi Sad (Yugoslavia))
The lake Provala near Vajska (Serbia, Yugoslavia) was created by the embankment performation during high Danube river levels in 1924. It is a very important water ecosystem of natural origin, which is a fact of great importance for exact biological and ecological research. Miljanovic (1996) and Pujin (1997) present the first lake Provala water state data. They emphasise the reinforced eutrophication process in the shore region. This paper presents the review of the macrophytes vegetation of the lake Provala recent state for the first time, with special attention to dominant plant species. Based on the present taxons analysis, as well as water chemical parameters analysed (NH4(+), NO3(-), NO2(-), PO4(3-), HPK, BPK, pH), it can be concluded that the eutrophication process is present in this water micro-reservoir. It is especially true for the shore region and shallow waters, where the process is already well under way and very fast. These research results can be used to efficiently protect this natural water ecosystem.
Show more [+] Less [-]The fish community as an indicator of water quality in the marsh of Kovilj [Serbia, Yugoslavia]
2001
Maletin, S. (Poljoprivredni fakultet, Novi Sad (Yugoslavia)) | Miljanovic, B. | Djukic, N. | Sipos, S.
In order to carry out the program of protection and rational exploitation of Kovilj Marsh (Serbia, Yugoslavia), which is a part of special natural reserve called the Marsh of Kovilj and Petrovaradin, we have done an ecological analysis of the fish community. The research was conducted during the period of "low water", in the autumn 2000, on the following locations: Slajz, Tonja and Arkanj, and we have established the presence of 12 species from 6 different families. The saprobic index of the majority of bioindicative species shows that the water belongs to the beta-mesosaprobic type (the saprobic index according to Pantle-Buck is 2.1). The presence and abundance of certain ecological groups of fish is examined in relation to migration, type of food and type of substrate on which the fish lay their eggs. The results of this examination point to main features of certain localities in this floodplain, as well as to the necessity of taking appropriate measures of protection of this valuable water resource.
Show more [+] Less [-]Influence of oil spill after bombarding of oil refinery on microbiological quality of groundwater in resources "Ratno Ostrvo" [Serbia, Yugoslavia]
2001
Petrovic, O. | Dalmacija, B. | Simeunovic, J. | Radnovic, D. | Matavulj, M. | Gajin, S. (Prirodno-matematicki fakultet, Novi Sad (Yugoslavia). Institut za biologiju)
Water quality standards and properties of bottling and mineral waters
2001
Stojiljkovic, D. (Poljoprivredni fakultet, Novi Sad (Yugoslavia). Institut za uredjenje voda)
Water quality is a main precondition for use in water supply and bottling. In this paper, a review of Yugoslavian standard referring to maximum allowed concentration of some components, as well as a review of some components contents in prohibited concentrations in Yugoslav and foreign bottling drinking and mineral waters are presented.
Show more [+] Less [-]Ecological investigations of the Montenegrin coastal sea [Adriatic sea, Montenegro, Yugoslavia] throughout summer, 2000
2001
Regner, D. | Vuksanovic, N. | Stjepcevic, B. | Dutina, M. (Institut za biologiju mora, Kotor (Yugoslavia))