scholarly journals Confidence distribution (CD) -- distribution estimator of a parameter

2007 ◽  
pp. 132-150 ◽  
Author(s):  
Kesar Singh ◽  
Minge Xie ◽  
William E. Strawderman
Keyword(s):  
Confidence Distribution ◽  
Cd Distribution

scholarly journals Analysis of Cadmium Root Retention for Two Contrasting Rice Accessions Suggests an Important Role for OsHMA2

Plants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 806
Author(s):  
Moez Maghrebi ◽  
Elena Baldoni ◽  
Giorgio Lucchini ◽  
Gianpiero Vigani ◽  
Giampiero Valè ◽  
...  
Keyword(s):  
Transcript Abundance ◽  
Root Cells ◽  
Expression Levels ◽  
Cd Tolerance ◽  
Relative Contribution ◽  
Relative Transcript Abundance ◽  
Potential Capacity ◽  
Cd Distribution ◽  
Cd Exposure ◽  
Cd Availability

Two rice accessions, Capataz and Beirao, contrasting for cadmium (Cd) tolerance and root retention, were exposed to a broad range of Cd concentrations (0.01, 0.1, and 1 μM) and analyzed for their potential capacity to chelate, compartmentalize, and translocate Cd to gain information about the relative contribution of these processes in determining the different pathways of Cd distribution along the plants. In Capataz, Cd root retention increased with the external Cd concentration, while in Beirao it resulted independent of Cd availability and significantly higher than in Capataz at the lowest Cd concentrations analyzed. Analysis of thiol accumulation in the roots revealed that the different amounts of these compounds in Capataz and Beirao, as well as the expression levels of genes involved in phytochelatin biosynthesis and direct Cd sequestration into the vacuoles of the root cells, were not related to the capacity of the accessions to trap the metal into the roots. Interestingly, the relative transcript abundance of OsHMA2, a gene controlling root-to-shoot Cd/Zn translocation, was not influenced by Cd exposure in Capataz and progressively increased in Beirao with the external Cd concentration, suggesting that activity of the OsHMA2 transporter may differentially limit root-to-shoot Cd/Zn translocation in Capataz and Beirao.

scholarly journals Influence of CdCl2 and CdSO4 supplementation on Cd distribution and ligand environment in leaves of the Cd hyperaccumulator Noccaea (Thlaspi) praecox

2013 ◽  
Vol 370 (1-2) ◽  
pp. 125-148 ◽  
Author(s):  
Špela Koren ◽  
Iztok Arčon ◽  
Peter Kump ◽  
Marijan Nečemer ◽  
Katarina Vogel-Mikuš
Keyword(s):  
Ligand Environment ◽  
Cd Distribution ◽  
Thlaspi Praecox

scholarly journals The Confidence Density for Correlation

Sankhya A ◽  
2021 ◽  
Author(s):  
Gunnar Taraldsen
Keyword(s):  
Explicit Formula ◽  
Posterior Distribution ◽  
Hypergeometric Functions ◽  
Real Data ◽  
Numerical Calculations ◽  
Posterior Density ◽  
Fiducial Inference ◽  
Objective Prior ◽  
Confidence Distribution ◽  
New Formula

AbstractInference for correlation is central in statistics. From a Bayesian viewpoint, the final most complete outcome of inference for the correlation is the posterior distribution. An explicit formula for the posterior density for the correlation for the binormal is derived. This posterior is an optimal confidence distribution and corresponds to a standard objective prior. It coincides with the fiducial introduced by R.A. Fisher in 1930 in his first paper on fiducial inference. C.R. Rao derived an explicit elegant formula for this fiducial density, but the new formula using hypergeometric functions is better suited for numerical calculations. Several examples on real data are presented for illustration. A brief review of the connections between confidence distributions and Bayesian and fiducial inference is given in an Appendix.

scholarly journals Identification of the factors determining the concentration and spatial distribution of Zn, Pb and Cd in the soils of the non-forest Tatra Mountains (southern Poland)

2022 ◽  
Author(s):  
Krystyna Ciarkowska ◽  
Anna Miechówka
Keyword(s):  
Distribution Patterns ◽  
Parent Material ◽  
Tatra Mountains ◽  
Spatial Continuity ◽  
Factors Affecting ◽  
Range Transport ◽  
West Carpathians ◽  
Potential Factors ◽  
Cd Distribution ◽  
Tatra National Park

AbstractWe investigated trace-metal (TM)––Zn, Pb and Cd––concentrations and spatial distributions in the uppermost layers of non-forest soils from Tatra National Park (West Carpathians). We aimed to determine the main factors affecting the distribution of TMs, as well as the risk they posed to the environment. TM concentrations were compared to the target and intervention values established by the Dutch Ministry. Principle component analysis was used to identify the potential factors affecting TM accumulation, with two-factor analysis being applied to further examine the importance of any given factor. To examine the regularity of the TM distribution, semivariograms were created. The semivariograms of Cd and Pb were similar, suggesting a moderate spatial dependence for these metal concentrations, while the Zn variogram indicated a lack of spatial continuity for this metal. We established that the Zn, Pb and Cd exceeded target levels and at some sites, Cd exceeded the intervention values, posing a strong ecological risk to the environment. Our study confirmed that the parent rock was the most important factor affecting the TM accumulation. The carbonate-free soils differed from carbonate soils in the second important factor affecting TM accumulation, for carbonate-free soils it was location when for carbonate soils–TM content in the parent material. The Zn, Pb and Cd distribution patterns indicated that Cd, but also to a lesser degree Pb and Zn, accumulation mainly resulted from long-range transport from industrialised areas, while the Zn concentrations were also affected by local sources, such as the historical mining of Zn ore.

Influences of elevated O3 and CO2 on Cd distribution in different Festuca arundinacea tissues

Chemosphere ◽  
2021 ◽  
pp. 133343
Author(s):  
Yang Jiang ◽  
Dan Chen ◽  
Pan Yang ◽  
Wenjing Ning ◽  
Min Cao ◽  
...  
Keyword(s):  
Festuca Arundinacea ◽  
Elevated O3 ◽  
Cd Distribution

Effects of Different Water Managements on Yield and Cadmium Accumulation in Rice

2014 ◽  
Vol 1073-1076 ◽  
pp. 248-252
Author(s):  
Yin Fei Lv ◽  
Yan Fang Ren ◽  
Dong Liu ◽  
Yan Chao Zhang ◽  
Jun Yu He
Keyword(s):  
Rice Yield ◽  
Cadmium Accumulation ◽  
Aerobic Treatment ◽  
Seed Setting ◽  
Ph Change ◽  
Panicle Number ◽  
Intermittent Irrigation ◽  
Cd Distribution ◽  
Seed Setting Rate ◽  
Cadmium Contaminated Soil

Water management affects the bioavailability of cadmium (Cd) in the soil and hence their accumulation in rice and grain yields. A pot experiment was carried out to investigate the effects of different water managements (flooding, intermittent irrigation and aerobic) on rice yield and cadmium accumulation in rice plants growing on cadmium contaminated soil. The results showed that compared to the flooding and aerobic treatment, the intermittent irrigation increased grain yield by 7.55-29.58%, which contributed to the increase of seed setting rate and panicle number. Compared with the intermittent irrigation, aerobic treatment significantly increased Cd contents in roots, straw and grains, while flooding reduced the Cd contents in rice. Compared with flooding, both aerobic and intermittent irrigation enhanced Cd distribution in the root and reduced it in the straw and grain. With increasing irrigation from aerobic to flooded conditions, the soil available Cd concentrations decreased significantly. The patterns of soil pH change were just opposite to those of soil available Cd. Thus, intermittent irrigation could increase rice yield and also reduce Cd in the grain.

Subcellular Cd distribution and its correlation with antioxidant enzymatic activities in wheat (Triticum aestivum) roots

2011 ◽  
Vol 74 (4) ◽  
pp. 874-881 ◽  
Author(s):  
Li Dandan ◽  
Zhou Dongmei ◽  
Wang Peng ◽  
Weng Nanyan ◽  
Zhu Xiangdong
Keyword(s):  
Triticum Aestivum ◽  
Enzymatic Activities ◽  
Cd Distribution

Confidence distribution inferences in one-way random effects model

Test ◽  
2015 ◽  
Vol 25 (1) ◽  
pp. 59-74 ◽  
Author(s):  
Xuhua Liu ◽  
Xingzhong Xu
Keyword(s):  
Random Effects ◽  
Random Effects Model ◽  
Confidence Distribution
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