Developmental Stability: A Sensitive Indicator of Populations Under Stress

2009 ◽  
pp. 136-136-23 ◽  
Author(s):  
JH Graham ◽  
DC Freeman ◽  
JM Emlen
Keyword(s):  
Developmental Stability ◽  
Sensitive Indicator

Correction: Evaluation of Root pH Change Through Gel Containing pH-sensitive Indicator Bromocresol Purple

BIO-PROTOCOL ◽  
2018 ◽  
Vol 8 (8) ◽  
Author(s):  
Aparecida Silva ◽  
Keini Dressano ◽  
Paulo Ceciliato ◽  
Juan Carlos Guerrero-Abad ◽  
Daniel Moura
Keyword(s):  
Ph Sensitive ◽  
Sensitive Indicator ◽  
Bromocresol Purple ◽  
Ph Change

scholarly journals Internal dose assessment of 148Gd using isotope ratios of gamma-emitting 146Gd or 153Gd in accidently released spallation target particles

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
C. Rääf ◽  
V. Barkauskas ◽  
K. Eriksson Stenström ◽  
C. Bernhardsson ◽  
H. B. L. Pettersson
Keyword(s):  
Operation Time ◽  
Isotope Ratios ◽  
Dose Assessment ◽  
Sensitive Indicator ◽  
Whole Body ◽  
Internal Dose ◽  
Tungsten Target ◽  
Alpha Emitter ◽  
Spallation Source ◽  
Effective Doses

AbstractThe pure alpha emitter 148Gd may have a significant radiological impact in terms of internal dose to exposed humans in case of accidental releases from a spallation source using a tungsten target, such as the one to be used in the European Spallation Source (ESS). In this work we aim to present an approach to indirectly estimate the whole-body burden of 148Gd and the associated committed effective dose in exposed humans, by means of high-resolution gamma spectrometry of the gamma-emitting radiogadolinium isotopes 146Gd and 153Gd that are accompanied by 148Gd generated from the operation of the tungsten target. Theoretical minimum detectable whole-body activity (MDA) and associated internal doses from 148Gd are calculated using a combination of existing biokinetic models and recent computer simulation studies on the generated isotope ratios of 146Gd/148Gd and 153Gd/148Gd in the ESS target. Of the two gamma-emitting gadolinium isotopes, 146Gd is initially the most sensitive indicator of the presence of 148Gd if whole-body counting is performed within a month after the release, using the twin photo peaks of 146Gd centered at 115.4 keV (MDA < 1 Bq for ingested 148Gd, and < 25 Bq for inhaled 148Gd). The corresponding minimum detectable committed effective doses will be less than 1 µSv for ingested 148Gd, but substantially higher for inhaled 148Gd (up to 0.3 mSv), depending on operation time of the target prior to the release. However, a few months after an atmospheric release, 153Gd becomes a much more sensitive indicator of body burdens of 148Gd, with a minimum detectable committed effective doses ranging from 18 to 77 µSv for chronic ingestion and between 0.65 to 2.7 mSv for acute inhalation in connection to the release. The main issue with this indirect method for 148Gd internal dose estimation, is whether the primary photon peaks from 146 and 153Gd can be detected undisturbed. Preliminary simulations show that nuclides such as 182Ta may potentially create perturbations that could impair this evaluation method, and which impact needs to be further studied in future safety assessments of accidental target releases.

Carotenoid as a sensitive indicator of sub lethal cadmium toxicity in Penaeus monodon post larvae

Ecotoxicology ◽  
2014 ◽  
Vol 24 (2) ◽  
pp. 339-345 ◽  
Author(s):  
Neelima Nadukooru ◽  
Prabhakara Rao Yallapragada
Keyword(s):  
Cadmium Toxicity ◽  
Penaeus Monodon ◽  
Sensitive Indicator

Is heart rate in fish a sensitive indicator to evaluate acute effects of β-blockers in surface water?

2006 ◽  
Vol 22 (3) ◽  
pp. 338-340 ◽  
Author(s):  
D.G. Joakim Larsson ◽  
Stina Fredriksson ◽  
Erik Sandblom ◽  
Nicklas Paxeus ◽  
Michael Axelsson
Keyword(s):  
Heart Rate ◽  
Surface Water ◽  
Sensitive Indicator ◽  
Acute Effects ◽  
Β Blockers

Morphological Developmental Stability in Plants: Patterns and Causes

1999 ◽  
Vol 160 (S6) ◽  
pp. S135-S146 ◽  
Author(s):  
Anders Pape Møller ◽  
Jacqui A. Shykoff
Keyword(s):  
Developmental Stability
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