Acta Facultatis Ecologiae - TechnickÃ¡ univerzita vo Zvolene

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85important for SIMS measurement. Losses are low asuncertainty of weighting [14]. Brightening stainlesssteel discs were used in this experiment. Electrodepositingcell is presented in Fig. 1.Preparation of discs with electrodeposited uraniumwas performed by methodology from GalandaD. [14] and Eichrom Industries, Ltd. [16]. Afterpreparation, discs were measured by low-levelalpha spectrometer. Recovery of electrodepositionwas accepted as a value 86 % in accordance toliterature [16]. Our calculations of weights of depositeduranium confirmed this value. Weights ofdeposited uranium isotopes were calculated fromtheir alpha activities. After alpha spectrometry,discs were analyzed by the machine TOF-SIMS IVat International Laser Center in Bratislava.1–3, ε = 0.18, Discs 4, 5, ε = 0.203; Background:
86Alpha spectrometryAlpha spectrometry with Dual alpha spectrometerwas realized before SIMS analysis. Activitieswere obtained from counts and calculated fromEquation 1:( nd− nb)A = , (1)e.Rwhere A is an activity of sample [Bq]; n dis a countrate of isotope [s –1 ]; n bis a count rate of background[s –1 ]; ε is efficiency of detector; R is recoveryof electrodeposition (R = 0.86 according to [16]).Uncertainities of alpha activity measurements werecalculated from Equation 2:AuA= ± .1.96 , (2)NDwhere A is alpha activity [Bq]; N Dis number ofcounts obtained from alpha spectrometry measurements.Results obtained from Eq. 1 and Eq. 2 aredescribed in Tab. 2:Relatively high difference between relationships234 U/ 238 U and 235 U/ 238 U are caused bylow activities of uranium isotopes at low-activesamples. These low-active samples were close tobackground.Conversions of activities to weights by Eq. 3are summarized in Tab. 3:A.Arm = . T1/ 2 , (3)N A.ln 2where m is weight of uranium isotope [g]; A isactivity [Bq]; A ris relative atomic weight; N AisA<strong>vo</strong>gadro’s constant; T 1/2is half time of decay [s].Surface area after electrodeposition was 2.97 cm 2 .Values of surface’s weights of uranium in g.cm –2are summarized in Tab. 3.SIMS resultsDiscs prepared by electrodeposition after alphaspectrometry were measured at the InternationalLaser Center in Bratislava by TOF-SIMS IVTab. 2 Results from alpha spectrometry234U235U238U234U/ 238 U235U/ 238 UDisc# 1Disc# 2Disc# 3Disc# 4Disc# 5.A [Bq] 0.0068 0.0002 0.0042 1.619 0.0476u A[±Bq] 0.0017 0.0003 0.0013A [Bq] 0.0124 0.0003 0.0102 1.216 0.0294u A[±Bq] 0.0023 0.0004 0.0021A [Bq] 0.0202 0.0014 0.0173 1.168 0.0809u A[±Bq] 0.0029 0.0008 0.0027A [Bq] 0.5687 0.0153 0.5152 1.1038 0.0297u A[±Bq] 0.0646 0.0090 0.0615A [Bq] 1.086 0.0267 1.128 0.9628 0.0237u A[±Bq] 0.089 0.0127 0.091Tab. 3 Values of weights and surface’s weights of uranium isotopesDisc No.234 235 238U U Um [g] m s[g.cm –2 ] M [g] m s[g.cm –2 ] m [g] m s[g.cm –2 ]Disc # 1 2.95⋅10 –11 2.93⋅10 –12 2.69.10 –9 9.07.10 –10 3.38.10 –7 1.14.10 –7Disc # 2 5.38.10 –11 1.81.10 –11 4.04.10 –9 1.36.10 –9 8.23.10 –7 2.77.10 –7Disc # 3 8.79.10 –11 2.96.10 –11 1.75.10 –8 5.90.10 –9 1.39.10 –6 4.70.10 –7Disc # 4 2.47.10 –9 8.32.10 –10 1.91.10 –7 6.44.10 –8 4.14.10 –5 1.39.10 –5Disc # 5 4.72.10 –9 1.59.10 –9 3.34.10 –7 1.13.10 –7 9.07.10 –5 3.06.10 –5
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Acta FacultatisEcologiaeJournal of
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OBSAH / CONTENTSISOL M., MICHALÍKO
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5ACTA FACULTATIS ECOLOGIAE, 16: Sup
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11ACTA FACULTATIS ECOLOGIAE, 16: Su
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19are lower in ill patients compare
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21are considered as the most accura
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24- multimode cavities are usually
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26the load during its exposure to f
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28Tradescantia paludosa 02 test and
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30Tab. 5: Results of positive contr
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Page 36 and 37: 35DISCUSSIONThe ionising radiation
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Page 40 and 41: 39222Rn is produced by radioactive
Page 42 and 43: 41180160140this reason we also pick
Page 44: 435001450400350hKz0,8h [m]300250200
Page 47 and 48: 46deposit is that stripped in off-l
Page 49 and 50: 48TruenessTrueness was determined i
Page 51 and 52: 50MATERIAL AND METHODSChloroform (p
Page 53 and 54: 52absorbance [a.u.]1,000,750,500,25
Page 55 and 56: 54Tab. 1: Rrequirements determinati
Page 57 and 58: 56Methods of VOC testing were set a
Page 60 and 61: 59Tab. 6: ContinuedSamples withsurf
Page 64 and 65: 63One of the possible explanations
Page 66 and 67: 65Ai - Ai-1 [Bq.m -3 ]86420-2-4-6-8
Page 70 and 71: 69BiodegradabilityThe great variety
Page 72 and 73: 71degradation starts of late days,
Page 74 and 75: 73Fig. 4 Treated (after 28 days of
Page 76: 75parameters of the cutting process
Page 80 and 81: 79Fraction: D (residual rest) prese
Page 82: 81was not confirmed. Maximum of mer
Page 85: 84Fig. 1 Schematic diagram of atomi
Page 89 and 90: 8880007000y = 6622xR 2 = 0.939SIMS
Page 94 and 95: 93Gemer according to the German mod
Page 96 and 97: 95Tab. 1 Results of the chemical an
Page 98 and 99: 97Continuation of Tab. 2 Results of
Page 100 and 101: 99Vlčia Dolina and from the reserv
Page 102 and 103: 101ACTA FACULTATIS ECOLOGIAE, 16: S
Page 104 and 105: 103mg.dm -3mg.dm -35,004,003,002,00
Page 106 and 107: 105year and the average value repre
Page 110 and 111: 109Sample site 1 Sample site 2 Samp
Page 112 and 113: 111As for the sampling time (Fig. 5
Page 116 and 117: 115Typha latifolia, Carex sp., Scir
Page 118 and 119: 117conditions for decomposition of
Page 122 and 123: 121from the background (derived fro
Page 124 and 125: 12311. PETROVSKÝ, E., ELWOOD, B.:
Page 128 and 129: 1272.52.0Correlation coefficient 0,
Page 132 and 133: 131RESULTS AND DISCUSSIONTable 2 gi
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135V-1 BOREHOLEThe courses of 222 R
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137AV-2 (40m) 2006A ( 222 Rn) [kBq/
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139soaks into the soil, another par
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141ACTA FACULTATIS ECOLOGIAE, 16: S
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143Fig. 2 The continuous monitoring
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145Indoor radon activity concentrat
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149Fig. 1 Podlipa dump-fieldCanada)
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151concentrations of Fe. Cu. Cd. Ni
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153DUMP-FIELDREFERENCE SITEppm15001
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155Fig. 5 Compression of wood forma
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157decrease in the following order:
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161SPECIFIC EXAMPLES OFFACTORS THAT
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165The methods developed to incorpo
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167The effects of wind on ozone con
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169Fig. 6 Mean total and stomatal f
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171transport modelling in North Ame
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Acta Facultatis Ecologiae, Volume 1
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