Studia Universitatis Babeş-Bolyai Biologia
Not a member yet
96 research outputs found
Sort by
Treatment of rubber effluent from rubber processing plant with fungi
No full textRubber processing industry produces materials used for the manufacturing of rubber industrial products. Large volume of water is consumed and produces a huge amount of effluent which is later discharged into the waterways, thereby causing pollution that affects human health. The effluent was collected from discharge points of a rubber factory. Microbial analyses were carried out before and after pollution. During the incubation, microbial growth in culture tubes was determined using UV-Spectrophotometer by measuring absorbance at wavelength 600nm at 24 hours interval. Four fungi were isolated and identified from rubber effluents which include Mucor mucedo and Aspergillus niger, Aspergillus flavus and Penicillium notatum. Individually, the selected fungi isolates were tested for its efficiency on the bioremediation of rubber processing effluent. The physicochemical properties reduction of the effluent such as BOD, COD, TS, TSS, TDS, phosphate and ammonia were observed after incubating for 7 days. Based on the data obtained in this study, it can be concluded that Mucor mucedo and Aspergillus niger can be used for bioremediation of rubber processing industry effluent with high efficiency.
Igiebor et al (PDF
Dan Munteanu, PhD, Corresponding member of the Romanian Academy (2 June 1937 - 25 February 2017)
Get PDFSome people don’t show their age. They are constantly in motion, dynamic, take initiatives, have never-ending ideas, are cheerful but firm, wise but flexible, optimistic, sometimes caustic and dedicated warriors for noble causes connected to their areas of activity. This is how Dr. Dan Munteanu was, a dreamer, a great connoisseur and a lover of nature
Multiple impact assessment and water quality based on diatom, benthic invertebrate and fish communities in the Arieș River catchment area (Transylvania, Romania)
No full textThe present paper represents an assessment of human impacts affecting the Arieș River catchment area, a region heavily affected by the mining industry documented in the middle river course (Roșia Montană, Abrud, Roșia Poieni) since the Roman period. Other important impacts in the study area were: eutrophication / organic pollution due to discharges of untreated domestic wastes of villages and towns from the region; river regularization works, wood exploitation and processing facilities and industrial wastes downstream Turda and Câmpia Turzii localities. Water quality evaluation was carried out using river biotic communities recommended by the European legislation (Water Framework Directive, WFD): diatoms, benthic invertebrates and fish. Twenty-three sampling sites were considered along the Arieș River main course and its main tributaries, and standardized methods were employed for sampling and processing of biological data. Benthic invertebrates prooved to be the most sensitive community, indicating disturbed ecological status downstream the mining-affected region mainly due to high contamination of river sediments. While ichthyofauna responses were moderate (with water quality classes usually ranging from high to moderate), diatoms reflected better the effects of eutrophication / organic pollution caused by human settlements.
Battes et al 2018 (PDF
The Species of birds from the protected area ROSPA0062 – the dam basins from the Argeş River – observed during the World Championship of Kaiac-Canoe Sprint Juniors and Youth U23 (Bascov Basin, 2017)
No full textIn this paper we present the results of the researches performed on the dam basins from ROSPA0062 - The dam basins from the Argeş River during the World Championship of Kaiac-Canoe Sprint Juniors and Youth U23, held on the Bascov Basin, part of this protected area. 55 species of birds were registered. Even if in 2017 the general situation was better than in 2013, when a similar study was carried on during a period when there were no sportsmen on any basin, the situation was completely different on Bascov Basin. There was a similar number of species, albeit only 35.71% of all were common in the two sets of observations, but, regarding their abundences, these were lower than in 2013 with over 90%, the most affected being the species dependent on wetlands. The human impact is obvious as the nautical base from Bascov Basin is a permanent factor of stress for the birds from the area. The very small number of species from the Annex I of the Birds Directive observed here stregthens the previously mentioned facts.
Mestecaneanu et Gava (PDF
Temporal variations in abundance and biomass of fish species inhabiting the K’sob reservoir (Eastern of Algeria)
No full textThis study presents data on fish community structure in the K’sob reservoirs (semi arid area) in the East of Algeria. The artisanal fishery was conducted from September 2010 to August 2011. The monthly variations in species composition were analyzed by effort and catch per unit of effort (CPUE) and biomass per unit of effort (BPUE). A total of seven species representing three families was recorded in the investigated reservoir. Cyprinids dominated in this reservoir. Luciobarbus callensis is the native species captured in this area, the rest of the fish were introduced. The other Cyprinids are: Cyprinus carpio carpio, Hypophthalmichthys molitrix, Hypophthalmichthys nobilis, Squalius cephalus. The Poecilidae were represented by Gambusia holbrooki. The third family, Cichlidae, was represeted by Oreochromis niloticus. The dominant species in terms of abundance was L. callensis, however, C. carpio carpio and H. nobilis showed higher values in biomass. Several species showed significant temporal variation in monthly samples. The fish assemblage is dominated by invasive species, while predatory species were not detected in the study.
Mimeche et Oliva-Paterna (PDF
Clutch size and egg repeatability in three elusive bird species: Little Bittern (Ixobrychus minutus), Little Crake (Zapornia parva) and Water Rail (Rallus aquaticus) from north-west Romanian populations
No full textData were collected from Little Bittern, Water Rail and Little Crake nests located in North-Western Romania, between April and July of 2002 - 2006 and 2010 - 2012. The repeatability was calculated as intra-class correlation of length, breadth and egg volume coefficients. The total number of active nests considered for the present study was as follows: 43 for Little Bittern, 25 for Water Rail and 9 for Little Crake. The clutch size in Little Bittern ranged from 4 to 7 eggs, in Water Rail from 4 to 10 and in Little Crake from 4 to 8 eggs. The repeatability values of egg parameters varied between 0.844 to 0.860 in Little Bittern, 0.262 - 0.374 in Water Rail and 0.310 - 0.574 in Little Crake. Short-term environmental impact was strong in case of Water Rail and Little Cracke, while the genetic component had little influence. For these two species, the low repeatability could be explained by larger numbers of eggs in a clutch, reflecting in turn a longer laying period.
David et al (PDF
Terrestrial isopods (Isopoda, Crustacea) from the “Danube Delta” Biosphere Reserve
No full textThe authors describe the fauna of terrestrial isopods and the habitats analysed in 13 sites located in the Biosphere Reserve “Danube Delta”: Letea Forest, Periprava Village, the Levees Maliuc, Caraorman, Dunavăţ, Sfântu Gheorghe, Sacalin Island, Popina Island, Enisala Fortress, Sălcioara (6 Martie) Forest, Doloşman Hill, Gura Portiţei and Lupilor Levee. In the investigated habitats 14 species of terrestrial isopods were identified: Hyloniscus riparius, Haplophtalmus orientalis, Cylisticus convexus, Porcellionides (= Metoponorthus) pruinosus, Orthometopon romanicus n. sp., Protracheoniscus politus, Porcellium collicola, Trachelipus arcuatus, Trachelipus nodulosus, Trachelipus rathkii, Trachelipus ratzeburgi, Trachelipus squamuliger, Armadillidium vulgare, Armadillidium jaqueti.
Tomescu et Teodor (PDF
Preliminary data regarding genetic diversity of several endangered and endemic Dianthus species from Romania generated by RAPD markers
No full textConservation of endangered and endemic species of Dianhtus from Romania, requires the investigation of genetic polymorphism in the populations. Preliminary data were obtained by molecular characterization using RAPD markers. DNA amplification with the 9 RAPD primers of the individuals belonging to different populations of D. callizonus, D. giganteus ssp. banaticus, D. glacialis ssp. gelidus, D. henteri, D. nardiformis, D. pratensis ssp. racovitzae, D. spiculifolius and D. tenuifolius revealed low level of polymorphism within and between populations. Several polymorphic RAPD markers were identified being useful for investigation of genetic diversity. Out the 9 primers studied by us, only the primer OPB-07 ensured amplification in all species and primers OPA-13, OPE-04 and 1225 showed positive results in most of the species. The primers 4A-26 and 4A-27 ensured amplification only in D. spiculifolius and the primers 4A-23 and OPM-18 gave no results in none of the species.
Butiuc-Keul et al (PDF
Revised checklist and new faunistic data of the Romanian Culicidae (Insecta, Diptera)
No full textWe present here an update checklist increases the number of Culicidae species in Romania from 50 to 60, split into 7 genera: Aedes (29 species), Anopheles (10 species), Coquillettidia (2 species), Culex (9 species), Culiseta (8 species), Orthopodomyia (1 species) and Uranotaenia (1 species). Additionally, 20 new faunistic records to different regions of Romania, mostly from Transylvania.
Torok et al (PDF
Optimisation control process of cyanide biodegradation from cassava mill effluent (CME) using indigenous microorganisms
No full textThe cyanide component of cassava mill effluent (CME) is highly toxic to man and its environment. This research was aimed at biodegrading cyanide from cassava mill effluent with various concentrations of cyanide, variable pH values, inoculum size and phenol. The heterotrophic bacterial and fungal counts were 6.32 x 108±0.01cfu/ml and 2.87 x 108±0.11cfu/ml, respectively. The microorganisms isolated and characterized were: Staphylococcus aureus, Bacillus sp., Escherichia coli, Lactobacillus sp., Micrococcus sp., Klebsiella sp., Pseudomonas, sp. Salmonella sp., Corynebacterium sp., Aspergillus niger, Penicillium sp., Fusarium sp. and Saccharomyces sp. The physicochemical parameters: pH (4.81), electrical conductivity (4860uS/cm), cyanide (17.13 mg/l), chemical oxygen demand (2041.20 mg/l), biological oxygen demand (1490.08mg/l), total dissolved solids (2478.60 mg/l), Chromium (19.44 mg/l), Manganese (136.08mg/l), Iron (340.20 mg/l) and Nickel (121.50 mg/l) were above the Federal Environmental Protection Agency standard for effluent discharge. Pseudomonas, Bacillus and Aspergillus species which had the highest turbidity values with enrichment medium supplemented with 1% cyanide were used for the batch biodegradation studies. Pseudomonas sp. had the best degradative ability of all isolates used even in the presence of phenol, an inhibitory substance. However, of all the varied substrate concentration used, 30ppm with other conditions remaining constant gave the highest degradative ability of 32.73% at a residence time of 8 days. Also, the highest biodegradation rate of 74.5% and 71.03% were achieved at pH, 6 and inoculum size of 6ml respectively at a residence time of 8days for 30ppm while other parameters were kept constant. The findings revealed that Pseudomonas sp., Bacillus sp. and Aspergillus sp. could be utilized for remediating cassava mill effluent contaminated environment containing cyanide.
Enerijiofi et Chukwuma (PDF