Search Results - "Panichev, N"

Determination of total mercury in fish and sea products by direct thermal decomposition atomic absorption spectrometry by Panichev, N.A., Panicheva, S.E.

“…•A method of direct thermal decomposition for Hg measurement in raw samples of fish was developed.•Samples of wet fish were analysed without any chemical…”
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Solid phase extraction of trace amount of mercury from natural waters on silver and gold nanoparticles by Panichev, N., Kalumba, M.M., Mandiwana, K.L.

“…•Ag/Au nanoparticle membrane filters were used to extract Hg extraction from natural water.•The LOD of Hg determination was lower (0.4ngL−1) than the…”
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Distribution of vanadium(V) species between soil and plants in the vicinity of vanadium mine by Panichev, N., Mandiwana, K., Moema, D., Molatlhegi, R., Ngobeni, P.

“…The distribution of vanadium(V) species between soil and plants around the vanadium mine have been studied. The mine dam spilled water around this area after…”
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The oxidation of Cr(III) to Cr(VI) in the environment by atmospheric oxygen during the bush fires by Panichev, N., Mabasa, W., Ngobeni, P., Mandiwana, K., Panicheva, S.

“…The presence of Cr(VI) in soils and plants of remote unpolluted areas can be explained by partial oxidation of Cr(III) with atmospheric oxygen during…”
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Determination of Cr(VI) in plants by electrothermal atomic absorption spectrometry after leaching with sodium carbonate by Panichev, N., Mandiwana, K., Kataeva, M., Siebert, S.

“…The determination of chromium (VI) compounds in plants by electrothermal atomic absorption spectrometry (ET AAS) is proposed based on their leaching with 0.1 M…”
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Treatment of iron(II)-rich acid mine water with limestone and oxygen by MOHAJANE, G. B, MAREE, J. P, PANICHEV, N

“…The main components of acid mine water are free acid, sulphate, and Fe²⁺. Limestone is the most cost-effective alkali that can be used for neutralization. The…”
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The solubility of Cr(III) and Cr(VI) compounds in soil and their availability to plants by Mandiwana, K.L., Panichev, N., Kataeva, M., Siebert, S.

“…The mystery surrounding high concentrations of Cr(III) in plants has been uncovered. It is attributed to the presence of low molecular weight organic acids…”
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Determination Of The Mercury Content Of Lichens and Comparison To Atmospheric Mercury Levels In The South African Highveld Region by Trüe, A., Panichev, N., Okonkwo, J., Forbes, P.B.C.

“…The concentration of mercury vapour in ambient air is routinely determined using specialised instruments.As an economical alternative, actively pumped…”
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Determination of hexavalent chromium in South African cements and cement-related materials with electrothermal atomic absorption spectrometry by Potgieter, S.S, Panichev, N, Potgieter, J.H, Panicheva, S

“…The selective extraction of Cr(VI) in a cement matrix, based on treatment with 0.1 M Na 2CO 3 solution and subsequent determination of chromium by…”
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PROGRAMMING 2-BIT PIN DIODE IN SYNOPSYS TCAD by Danilenko, Alexander A., Strygin, Anton V., Mikhailov, Nikolay I., Perepelovsky, Vadim V., Panichev, Yaroslav N., Marochkin, Vladislav V., Ivanov, Vladimir L.

“…The article is devoted to the modeling of a two-bit pin-diode. The possibility of programming opening time of the device based on the pin-diode is shown. The…”
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Levels of heavy metals in seals of Lake Ladoga and the White Sea by Medvedev, N, Panichev, N, Hyvärinen, H

“…Between 1990 and 1993 samples of hair, liver, kidney and muscle were collected from 28 ringed seals from Lake Ladoga, Phoca hispida ladogensis, 20 ringed…”
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Determination of total mercury in fish and sea products by direct thermal decomposition atomic absorption spectrometry by PANICHEV, N. A, PANICHEVA, S. E

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Condensation of analyte vapor species in graphite furnace atomic absorption spectrometry by Panichev, N.A., Ma, Q., Sturgeon, R.E., Chakrabarti, C.L., Pavski, V.

“…A shadow spectral digital imaging technique (SSDI) with charge coupled device (CCD) camera detection was used to investigate the spatial and temporal…”
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The leaching of vanadium(V) in soil due to the presence of atmospheric carbon dioxide and ammonia by Mandiwana, Khakhathi L., Panichev, Nikolay

“…The natural leaching of vanadium(V) with CO 2 from soil-water in the presence of ammonia, a known precursor to atmospheric aerosols, has been tested by…”
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Speciation of Cr(VI) in environmental samples in the vicinity of the ferrochrome smelter by Sedumedi, Hilda N., Mandiwana, Khakhathi L., Ngobeni, Prince, Panichev, Nikolay

“…The impact of ferrochrome smelter on the contamination of its environment with toxic hexavalent chromium, Cr(VI), was assessed by analyzing smelter dusts,…”
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New data on the stratigraphy, volcanism, and zeolite mineralization of the Cenozoic Vanchinskaya depression in primorye by Chekryzhov, I. Yu, Popov, V. K., Panichev, A. N., Seredin, V. V., Smirnova, E. V.

“…This paper presents the results of studying the Cenozoic volcanogenic-sedimentary cover of the Vanchinskaya depression of Sikhote Alin. It was established…”
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Levels of heavy metals in seals of Lake Ladoga and the White Sea by Medvedev, N., Panichev, N., Hyvärinen, H.

“…Between 1990 and 1993 samples of hair, liver, kidney and muscle were collected from 28 ringed seals from Lake Ladoga, Phoca hispida ladogensis, 20 ringed…”
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Electrothermal atomic absorption spectrometric determination of vanadium(V) in soil after leaching with Na2CO3 by MANDIWANA, Khakhathi L, PANICHEV, Nikolay

“…Vanadium(V) is a potentially dangerous chemical pollutant, which coexists in the natural environment with V(IV) species. A method of selectively leaching V(V)…”
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The application of bio-indicators for the assessment of air pollution by Panichev, N, McCrindle, R I

“…Levels of metals were assessed in topsoil, dust, leaves, grass, lichen and bark from the Kruger National Park using electrothermal atomic absorption…”
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Monitoring mercury in two South African herbaria by Kataeva, Maria, Panichev, Nikolay, van Wyk, Abraham E.

“…Mercury [Hg] emissions from old plant collections treated with mercuric chloride (HgCl 2) may present a high health risk for staff working in certain herbaria…”
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