scholarly journals Erratum: Properties of γ -decaying isomers and isomeric ratios in the Sn100 region [Phys. Rev. C 96 , 044311 (2017)]

2018 ◽  
Vol 97 (1) ◽  
Author(s):  
J. Park ◽  
R. Krücken ◽  
D. Lubos ◽  
R. Gernhäuser ◽  
M. Lewitowicz ◽  
...  
Keyword(s):  
Isomeric Ratios

scholarly journals Changing sources and environmental factors reduce the rates of decline of organochlorine pesticides in the Arctic Atmosphere

2009 ◽  
Vol 9 (1) ◽  
pp. 515-540 ◽  
Author(s):  
S. Becker ◽  
C. J. Halsall ◽  
W. Tych ◽  
R. Kallenborn ◽  
M. Schlabach ◽  
...  
Keyword(s):  
Water Exchange ◽  
Significant Decline ◽  
Primary Sources ◽  
The Arctic ◽  
Secondary Sources ◽  
Increasing Trend ◽  
Cyclical Behaviour ◽  
Harmonic Regression ◽  
Arctic Atmosphere ◽  
Isomeric Ratios

Abstract. An extensive database of organochlorine (OC) pesticide concentrations measured at the Norwegian Arctic Monitoring Station was analysed to assess longer-term trends in the Arctic atmosphere. Dynamic Harmonic Regression (DHR) is employed to investigate the seasonal and cyclical behaviour of chlordanes, DDTs and hexachlorobenzene (HCB), and to isolate underlying inter-annual trends. Although a simple comparison of annual mean concentrations (1994–2005) suggest a decline for all of the OCs investigated, the longer-term trends identified by DHR only show a significant decline for p,p'-DDT. Indeed, HCB shows an increase from 2003–2005. This is thought to be due to changes in source types and the presence of impurities in current use pesticides, together with retreating sea ice affecting air-water exchange. Changes in source types were revealed by using isomeric ratios for the chlordanes and DDTs. Declining trends in ratios of trans-chlordane/cis-chlordane (TC/CC) indicate a shift from primary sources, to more ''weathered'' secondary sources, whereas an increasing trend in o,p'-DDT/p,p'-DDT ratios indicate a shift from use of technical DDT to dicofol. Continued monitoring of these OC pesticides is required to fully understand the influence of a changing climate on the behaviour and environmental cycling of these chemicals in the Arctic as well as possible impacts from ''new'' sources.

scholarly journals Changing sources and environmental factors reduce the rates of decline of organochlorine pesticides in the Arctic atmosphere

2012 ◽  
Vol 12 (9) ◽  
pp. 4033-4044 ◽  
Author(s):  
S. Becker ◽  
C. J. Halsall ◽  
W. Tych ◽  
R. Kallenborn ◽  
M. Schlabach ◽  
...  
Keyword(s):  
Water Exchange ◽  
Significant Decline ◽  
Primary Sources ◽  
The Arctic ◽  
Secondary Sources ◽  
Increasing Trend ◽  
Cyclical Behaviour ◽  
Harmonic Regression ◽  
Arctic Atmosphere ◽  
Isomeric Ratios

Abstract. An extensive database of organochlorine (OC) pesticide concentrations measured at the Norwegian Arctic monitoring station at Ny-Ålesund, Svalbard, was analysed to assess longer-term trends in the Arctic atmosphere. Dynamic Harmonic Regression (DHR) is employed to investigate the seasonal and cyclical behaviour of chlordanes, DDTs and hexachlorobenzene (HCB), and to isolate underlying inter-annual trends. Although a simple comparison of annual mean concentrations (1994–2005) suggest a decline for all of the OCs investigated, the longer-term trends identified by DHR only show a significant decline for p,p'-DDT. Indeed, HCB shows an increase from 2003–2005. This is thought to be due to changes in source types and the presence of impurities in current use pesticides, together with retreating sea ice affecting air-water exchange. Changes in source types were revealed by using isomeric ratios for the chlordanes and DDTs. Declining trends in ratios of trans-chlordane/cis-chlordane (TC/CC) indicate a shift from primary sources, to more "weathered" secondary sources, whereas an increasing trend in o,p'-DDT/p,p'-DDT ratios indicate a shift from use of technical DDT to dicofol. Continued monitoring of these OC pesticides is required to fully understand the influence of a changing climate on the behaviour and environmental cycling of these chemicals in the Arctic as well as possible impacts from "new" sources.

Production Cross Sections and Isomeric Ratios for the Isomeric Pair 89mNb and 89gNb in the 90Zr (d,3n) 89m/gNb Reaction

1976 ◽  
Vol 23 (3-4) ◽  
Author(s):  
O. HERREROS USHER ◽  
C. M. ARIZMENDI ◽  
C. WASILEVSKY ◽  
S. J. NASSIFF
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
Isomeric Pair ◽  
Isomeric Ratios

Cross sections of isomeric ratios of /α, αn/ and /α, 2p3n/ reactions on103Rh

1989 ◽  
Vol 137 (3) ◽  
pp. 173-182 ◽  
Author(s):  
M. J. Ozafran ◽  
H. O. Mosca ◽  
M. E. Vazquez ◽  
S. J. Nassiff
Keyword(s):  
Cross Sections ◽  
Isomeric Ratios
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