A comparative study of the effects of inhaled cadmium chloride and cadmium oxide: Pulmonary response

1987 ◽  
Vol 21 (1-2) ◽  
pp. 219-232 ◽  
Author(s):  
Elaine C. Grose ◽  
Judy H. Richards ◽  
Richard H. Jaskot ◽  
Margaret G. Ménache ◽  
Judith A. Graham ◽  
...  
1987 ◽  
Vol 6 (4) ◽  
pp. 451-459 ◽  
Author(s):  
E. C. Grose ◽  
J. H. Richards ◽  
R. H. Jaskot ◽  
M. G. Ménache ◽  
J. A. Graham ◽  
...  

The toxicity of inhaled aerosols of cadmium chloride (CdCl2) and cadmium oxide (CdO) on hepatic biochemical function was compared. Male rats were exposed for 2 hours to concentrations of 0.45 and 4.5 mg Cd/m3. Serum and liver enzymes and histological changes were studied immediately and 72 hours after exposure. Exposure to 4.5 mg/m3 CdCl2 and CdO resulted in an increase in liver Cd content. This deposition was not observed at the lower concentrations. Following exposure to 4.5 mg/m3 CdCl2, decreases in body and liver weight, as well as decreased activities of glutathione (GSH)-reductase, GSH-peroxidase, and glucose-6-phosphate dehydrogenase (G-6-PDH) were observed. Increases in serum bilirubin and activities of creatine kinase, lactate dehydrogenase, and aspartate aminotransferase were evident 72 hours after exposure. Exposure to 4.5 mg/m3 CdO caused decreased activities of GSH-reductase and peroxidase, G-6-PDH, and an increased activity of serum alkaline phosphatase and lactate dehydrogenase. Exposure to 0.45 mg/m3 CdCl2, produced more hepatic effects than did a similar exposure to CdO. This differential response between inhalation of CdCl2 and CdO was probably due to a rapid clearance of CdCl2 or Cd2+ ions from the lung and transport to the liver via the systemic blood circulation.


2020 ◽  
Vol 35 (1) ◽  
pp. 42-49
Author(s):  
Gharam Alharshan ◽  
Dalal Aloraini ◽  
Mohamed Elzaher ◽  
Mohamed Badawi ◽  
Mahmoud Alabsy ◽  
...  

In this work, polymer composites of high density polyethylene reinforced by micro-sized and nanosized cadmium oxide, lead oxide, and a mixture of both with filler weight fraction of 30% were prepared by compression molding technique and characterized by scanning electron microscope. This investigation aims to present a comparative study between cadmium oxide and lead oxide according to their sizes as fillers in high density polyethylene polymeric matrix for gamma-radiation shielding applications. The mass and linear attenuation coefficients of the investigated composites were measured as a function of g-ray energies ranging from 59.53 keV to 1408.01 keV using standard radioactive point sources (241Am, 133Ba, 137Cs, 60Co, and 152Eu). The measurements were made with a narrow beam geometry setup using a well calibrated hyper pure germanium cylindrical detector. The theoretical values of the mass attenuation coefficients were evaluated using the XCOM program database. The experimental results demonstrated that, according to the filler size, cadmium oxide composite is better as a gamma absorber in the energy region less than 81 keV, while lead oxide composite is better in the energy region greater than 81 keV. Moreover, for the same chemical structure and weight fraction of the composite, nano fillers show better attenuation performance than micro fillers in high density polyethylene based radiation shielding material.


2007 ◽  
Vol 119 ◽  
pp. 21-26 ◽  
Author(s):  
K.G. Kanade ◽  
Ranjit R. Hawaldar ◽  
Uttam Mulik ◽  
B.B. Kale ◽  
Dinesh Amalnerkar

We offer sui-generis strategy for synthesis of nanosized chalcogenide semiconductors in polymer matrix by a novel polymer-inorganic solid-state reaction. In our previous report, the rationale of this strategy has been successfully established by the solid-state reaction between CdI2 and an intentionally chosen engineering thermoplastic, namely, polyphenylene sulphide (PPS). In the pursuit of this work, we explored the possibility of using other cadmium salts viz cadmium nitrate, cadmium chloride and cadmium acetate in place of cadmium iodide for the envisaged solidstate reaction with PPS. All the reactions were carried out at the melting temperature of PPS (285oC) in 1:1 and 10:1 molar ratios of polymer to cadmium salt. The resultant products were characterised by XRD, TEM-SAED and DRS. It is observed that only cadmium nitrate yielded CdS nanocrystallites (average size of 15nm) entrapped in modified polymer matrix in a competing behaviour with cadmium iodide when reacted in 10:1 molar ratio while (i) cadmium acetate leads to the formation of only cadmium oxide and (ii) cadmium chloride exhibits grossly incomplete solid state reaction yielding understated quantity of CdS when reacted with PPS.


2020 ◽  
Vol 35 (4) ◽  
pp. 386-386
Author(s):  
E Editorial

In the article A COMPARATIVE STUDY BETWEEN NANO-CADMIUM OXIDE AND LEAD OXIDE REINFORCED IN HIGH DENSITY POLYETHYLENE AS GAMMA RAYS SHIELDING COMPOSITES by Gharam A. ALHARSHAN, Dalal A. ALORAINI, Mohamed Abd ELZAHER, Mohamed S. BADAWI, Mahmoud T. ALABSY, Mahmoud I. ABBAS, and Ahmed M. EL-KHATIB published in the journal Nuclear Technology & Radiation Protection, 35 (2020), 1, pp. 42-49, the authors omitted the acknowledgement.


2020 ◽  
Author(s):  
Bruno Oliveira Ferreira de Souza ◽  
Éve‐Marie Frigon ◽  
Robert Tremblay‐Laliberté ◽  
Christian Casanova ◽  
Denis Boire

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