References of "Nonova, Tzvetana"
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See detail90Sr, 210Pb, 210Po and Ra isotopes in marine macroalgae and mussel Mytilus galloprovincialis from the Bulgarian Black Sea zone
Tosheva, Zornitza UL; Nonova, Tzvetana

in Journal of Radioanalytical and Nuclear Chemistry (2015)

90Sr, 210 Pb, 210Po and Ra isotopes were determined in macroalgae Ceramium rubrum, Cystoseira crinita, Ulva rigida, Cladophora vagabunda, Enteromor- pha intestinalis and in mussels Mytilus ... [more ▼]

90Sr, 210 Pb, 210Po and Ra isotopes were determined in macroalgae Ceramium rubrum, Cystoseira crinita, Ulva rigida, Cladophora vagabunda, Enteromor- pha intestinalis and in mussels Mytilus galloprovincialis collected from the Bulgarian Black Sea coast. Radio- chemical separation was made by a fast and reproducible procedure based on a calcium phosphate precipitation technique. The obtained results for macroalgae vary in the interval 0.23–0.85 Bq kg-1 for 90Sr, 2.2–10.6 Bq kg-1 for 210Pb, 1.2–9.7 Bq kg-1 for 210Po and 1.9–13.2 Bq kg-1 for Ra isotopes. Data obtained for mussels demonstrate similar abilities in the accumulation of 90Sr, 210Pb and Ra isotopes. [less ▲]

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See detailCesium and strontium in Black Sea macroalgae
Nonova, Tzvetana; Tosheva, Zornitza UL

in Journal of Environmental Radioactivity (2014), 129

The trace level of metals and particularly radioactive ones should be monitored to evaluate the transfer along the trophic chain, assess the risk for biota and can be used for global changes assessment ... [more ▼]

The trace level of metals and particularly radioactive ones should be monitored to evaluate the transfer along the trophic chain, assess the risk for biota and can be used for global changes assessment. Plants respond rapidly to all changes in the ecosystem conditions and are widely used as indicators and pre- dictors for changes in hydrology and geology. In this work we represent our successful development and applications of a methodology for monitoring of stable and radioactive strontium and cesium in marine biota (Black Sea algae’s). In case of radioactive release they are of high interest. We use ED-XRF, gamma spectrometers and LSC instrumentation and only 0.25 g sample. Obtained results are compared with those of other authors in same regions. The novelty is the connection between the radioactive isotopes and their stable elements in algae in time and space scale. All our samples were collected from Bulgarian Black Sea coast. [less ▲]

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