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  1. Artikel: Cyanobacteria and algae from biofilm at the entrance zone of Petnica Cave

    Popović Slađana S. / Petrović Kristina M. / Trnavac-Bogdanović Dušica S. / Milošević Dragana L. / Graovac Ana D. / Trbojević Ivana S. / Subakov-Simić Gordana V.

    Zbornik Matice srpske za prirodne nauke. 2021, v. 2021, no. 140

    2021  

    Abstract: The importance of biofilms in caves, the diversity of microorganisms in them, their mutual relationship and relationship with the substratum are among the advancing research topics in microbial biospeleology. This research is making contribution to the ... ...

    Abstract The importance of biofilms in caves, the diversity of microorganisms in them, their mutual relationship and relationship with the substratum are among the advancing research topics in microbial biospeleology. This research is making contribution to the knowledge about biofilms at cave entrances and phototrophic communities in them. In that manner, biofilms from the entrance zone of the Petnica Cave were examined. Light microscopy showed that cyanobacteria were exclusively dominant phototrophs (34 taxa out of 39 total taxa recorded) with coccoid forms prevailing (28 taxa); simple trichal forms were present to a lesser extent, while heterocytous ones were completely absent. Genera Gloeocapsa, Chroococcus,Gloeothece and Leptolyngbya were the most diverse. Four green algal genera characteristic for aerophytic habitats (Apatococcus, Desmococcus, Haematococcus and Trentepohlia) were also recorded, while Bacillariophytawere observed sporadically. Three groups of sampling sites were distinguished based on recorded taxa, their richness and similarity, using non-metric multidimensional scaling (NMDS). Quantitative biofilm characteristics were also assessed - the content of chlorophyll a (Chl a) was determined, as well as the contents of water, organic and inorganic matter. Chl a had a significant positive correlation with the content of organic matter (r=0.904, P=0.013).
    Schlagwörter Desmococcus ; Gloeocapsa ; Haematococcus ; Leptolyngbya ; Trentepohlia ; algae ; autotrophs ; biofilm ; chlorophyll ; inorganic matter ; light microscopy ; organic matter
    Sprache Englisch
    Umfang p. 71-84.
    Erscheinungsort Matica srpska
    Dokumenttyp Artikel
    ZDB-ID 2603457-8
    ISSN 2406-0828 ; 0352-4906
    ISSN (online) 2406-0828
    ISSN 0352-4906
    DOI 10.2298/ZMSPN2140071P
    Datenquelle NAL Katalog (AGRICOLA)

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  2. Artikel ; Online: Cyanobacteria and algae from biofilm at the entrance zone of Petnica Cave

    Popović Slađana S. / Petrović Kristina M. / Trnavac-Bogdanović Dušica S. / Milošević Dragana L. / Graovac Ana D. / Trbojević Ivana S. / Subakov-Simić Gordana V.

    Zbornik Matice Srpske za Prirodne Nauke, Vol 2021, Iss 140, Pp 71-

    2021  Band 84

    Abstract: The importance of biofilms in caves, the diversity of microorganisms in them, their mutual relationship and relationship with the substratum are among the advancing research topics in microbial biospeleology. This research is making contribution to the ... ...

    Abstract The importance of biofilms in caves, the diversity of microorganisms in them, their mutual relationship and relationship with the substratum are among the advancing research topics in microbial biospeleology. This research is making contribution to the knowledge about biofilms at cave entrances and phototrophic communities in them. In that manner, biofilms from the entrance zone of the Petnica Cave were examined. Light microscopy showed that cyanobacteria were exclusively dominant phototrophs (34 taxa out of 39 total taxa recorded) with coccoid forms prevailing (28 taxa); simple trichal forms were present to a lesser extent, while heterocytous ones were completely absent. Genera Gloeocapsa, Chroococcus,Gloeothece and Leptolyngbya were the most diverse. Four green algal genera characteristic for aerophytic habitats (Apatococcus, Desmococcus, Haematococcus and Trentepohlia) were also recorded, while Bacillariophytawere observed sporadically. Three groups of sampling sites were distinguished based on recorded taxa, their richness and similarity, using non-metric multidimensional scaling (NMDS). Quantitative biofilm characteristics were also assessed - the content of chlorophyll a (Chl a) was determined, as well as the contents of water, organic and inorganic matter. Chl a had a significant positive correlation with the content of organic matter (r=0.904, P=0.013).
    Schlagwörter aerophytic phototrophs ; algae ; biofilm ; cyanobacteria ; petnica cave ; Science (General) ; Q1-390
    Thema/Rubrik (Code) 590
    Sprache Englisch
    Erscheinungsdatum 2021-01-01T00:00:00Z
    Verlag Matica srpska
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  3. Artikel ; Online: Removal of heavy metals from water using multistage functionalized multiwall carbon nanotubes

    Budimirović Dragoslav / Veličković Zlate S. / Bajić Zoran / Milošević Dragana L. / Nikolić Jasmina B. / Drmanić Saša Ž. / Marinković Aleksandar D.

    Journal of the Serbian Chemical Society, Vol 82, Iss 10, Pp 1175-

    2017  Band 1191

    Abstract: The multistage synthesis of the multi-wall carbon nanotubes (MWCNT) modified with polyamidoamine dendrimers, A1/ and A2/MWCNT, capable of cation removal, is presented in this work, as well as novel adsorbents based on these precursor materials and ... ...

    Abstract The multistage synthesis of the multi-wall carbon nanotubes (MWCNT) modified with polyamidoamine dendrimers, A1/ and A2/MWCNT, capable of cation removal, is presented in this work, as well as novel adsorbents based on these precursor materials and modified with goethite nano-deposit, α-FeOOH, A1/ and A2/MWCNT–α-FeO(OH) adsorbents used for As(V) removal. In a batch test, the influence of pH, contact time, initial ion concentration and temperature on adsorption efficiency were studied. Adsorption data modelling by the Langmuir isotherm, revealed good adsorption capacities (in mg g-1) of 18.8 for As(V) and 60.1 and 44.2 for Pb2+ and Cd2+ on A2/MWCNT, respectively. Also, 27.6 and 29.8 mg g-1 of As(V) on A1/ and A2/MWCNT–α-FeO(OH), respectively, were removed. Thermodynamic parameters showed that the adsorption is spontaneous and endothermic processes. Results of the study of influences of competitive ions: bicarbonate, sulfate, phosphate, silicate, chromate, fluoride and natural organic matter (NOM), i.e., humic acid (HA), showed the highest effect of phosphate on the decrease of arsenate adsorption. Time-dependent adsorption was best described by pseudo-second-order kinetic model and Weber–Morris model which predicted intra-particle diffusion as a rate-controlling step. Also, activation energy (Ea / kJ mol-1): 8.85 for Cd2+, 9.25 for Pb2+ and 7.98 for As(V), were obtained from kinetic data. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. III45019 and Grant no. OI 172057]
    Schlagwörter arsenic ; cadmium ; lead ; adsorption ; nanocomposites ; MWCNT ; goethite ; Chemistry ; QD1-999
    Thema/Rubrik (Code) 541
    Sprache Englisch
    Erscheinungsdatum 2017-01-01T00:00:00Z
    Verlag Serbian Chemical Society
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  4. Artikel: Determination of inorganic anions in herbal tea infusions using ion chromatography

    Milovanović Željka J. / Popović Slađana S. / Pantelić Ana S. / Milinkov Jelena R. / Milošević Dragana L. / Petrović Vladimir M. / Vidović Milka M.

    Zbornik Matice srpske za prirodne nauke. 2018, v. 2018, no. 134

    2018  

    Abstract: The ionic content was examined in nine aqueous tea extracts in which time of boiling, acidification of the medium using lemon juice and way of preparation were observed as factors. Ion chromatography was used for determination of inorganic anion content, ...

    Abstract The ionic content was examined in nine aqueous tea extracts in which time of boiling, acidification of the medium using lemon juice and way of preparation were observed as factors. Ion chromatography was used for determination of inorganic anion content, and data were processed using CANOCO program for multivariate analysis. The variations in ionic content were observed among different tea samples. The highest concentrations of chloride, nitrate, phosphate, and sulphate ions were found in nettle, while the highest concentrations of fluorides were detected in elderflower tea infusion. The effect of boiling time (5, 10, and 20 min), acidification of the medium and different preparation procedure (boiling and cooling at room temperature) were statistically presented using principal component analysis. The examined factors did not have a significant effect on the ionic concentration in tea infusions. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 176018 and Grant No. 172001]
    Schlagwörter acidification ; ambient temperature ; chlorides ; education ; herbal tea ; ion exchange chromatography ; lemon juice ; multivariate analysis ; nitrates ; phosphates ; principal component analysis ; sulfates
    Sprache Englisch
    Umfang p. 89-99.
    Erscheinungsort Matica srpska
    Dokumenttyp Artikel
    ZDB-ID 2603457-8
    ISSN 2406-0828 ; 0352-4906
    ISSN (online) 2406-0828
    ISSN 0352-4906
    DOI 10.2298/ZMSPN1834089M
    Datenquelle NAL Katalog (AGRICOLA)

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    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

  5. Artikel ; Online: Determination of inorganic anions in herbal tea infusions using ion chromatography

    Milovanović Željka J. / Popović Slađana S. / Pantelić Ana S. / Milinkov Jelena R. / Milošević Dragana L. / Petrović Vladimir M. / Vidović Milka M.

    Zbornik Matice Srpske za Prirodne Nauke, Vol 2018, Iss 134, Pp 89-

    2018  Band 99

    Abstract: The ionic content was examined in nine aqueous tea extracts in which time of boiling, acidification of the medium using lemon juice and way of preparation were observed as factors. Ion chromatography was used for determination of inorganic anion content, ...

    Abstract The ionic content was examined in nine aqueous tea extracts in which time of boiling, acidification of the medium using lemon juice and way of preparation were observed as factors. Ion chromatography was used for determination of inorganic anion content, and data were processed using CANOCO program for multivariate analysis. The variations in ionic content were observed among different tea samples. The highest concentrations of chloride, nitrate, phosphate, and sulphate ions were found in nettle, while the highest concentrations of fluorides were detected in elderflower tea infusion. The effect of boiling time (5, 10, and 20 min), acidification of the medium and different preparation procedure (boiling and cooling at room temperature) were statistically presented using principal component analysis. The examined factors did not have a significant effect on the ionic concentration in tea infusions. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 176018 and Grant No. 172001]
    Schlagwörter herbal tea ; inorganic anions ; ion chromatography ; principal component analysis ; tea infusion ; Science (General) ; Q1-390
    Sprache Englisch
    Erscheinungsdatum 2018-01-01T00:00:00Z
    Verlag Matica srpska
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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