spectrometry Articles
-
Isotope correlations for determining the isotopic composition of plutonium produced in research and power reactors using the experimental data obtained by alpha and mass spectrometry
Correlations have been developed for obtaining the isotopic composition of Pu produced in Indian research (CIRUS, DHRUVA) and power (PHWR) reactors. The experimental data obtained on 238Pu/(239Pu + 240Pu) alpha activity ratio using alpha spectrometry and on 240Pu/239Pu, 241Pu/239Pu, 242Pu/239Pu atom ratios by thermal ionisation mass spectrometry were used for developing isotope ...
-
Application of chemometry for identification of the source of plutonium
Isotope correlations and chemometry using Principal Component Analysis (PCA) have been used on the experimental data on Pu from different kinds of reactors, e.g. research, power reactors with low and high burn-up as well as for fuels with different 235U content. It is demonstrated that the combined use of isotope correlations and PCA is a powerful tool to discriminate Pu originating from ...
-
Comparison of spectrometry with arsenazo III and neutronic activation for U and Th determination in phosphogypsum
Phosphogypsum is a byproduct from the phosphoric acid industry which is formed by crystallisation during sulfuric acid attack on phosphate rocks. While the composition of phosphogypsum is dihydrated calcium sulphate, the material can contain high levels of impurities that exist in phosphate rocks, such as radionuclides from the 238U and 232Th series. The most common way of disposing of ...
-
Determination of radium-226 in phosphate fertilisers and gypsum by gamma-ray spectrometry
The 226Ra isotope was determined in 17%, 20% and 46% phosphate fertilisers and in gypsum. The fertiliser samples were dissolved in 10% nitric acid solution. The barium sulfate method was used for the precipitation of 226Ra. An alkaline fusion method was used to separate the 226Ra from the gypsum. The 226Ra concentrations present in these materials were between 10-4 and 10-5µg ...
-
Estimation of
238U,232Th and40K concentrations in rock and soil samples around SouThe first few measurements for low level gamma ray spectrometry for the delineation of U and Th along South Purulia Shear Zone (SPSZ) are reported. Estimation of 238U, 232Th and 40K concentrations in widely dispersed rock and soil samples around SPSZ has been undertaken using HPGe detector having relative efficiency of 50%. The maximum concentration among all the samples studied is observed in ...
-
Determination of uranium concentration in surface soil samples of Iran
The use of uranium-tipped antitank shells during the Iraq war (2003) caused serious concerns in Iran and the international media over possible contamination of the Iranian environment and consequent long-term health effects. After a shell explosion, uranium is discharged by fire into the air in the form of oxidised particles, which can be dispersed over a radius of several kilometres. Gamma ray ...
-
Measurements of 226Ra, 232Th and 40K using gamma spectrometry to assess a first-order exposure risk for residents of Western Haryana, India
The measurements of 226Ra, 232Th and 40K using gamma spectrometry and measurements of radon concentration and exhalation rates using solid-state nuclear track (LR-115, Type-II plastic) detectors were used to assess a first-order exposure risk for people residing in the Fatehbad and Hissar districts in Western Haryana, India. The concentrations of radium, thorium and potassium in the soil samples ...
-
Survey of natural and artificial radioactivity in Tunisian soils
A study of the natural radioactivity and artificial radioactivity of soils due to gamma ray emitters was performed in Tunisia, as part of the national programme for environment surveillance. Seventeen sites were studied. The determination of radionuclide specific concentrations in the soil samples (0–5 cm) by gamma ray spectrometry showed the following ranges: 40K (93–319 Bq/kg), 226Ra (5–50 ...
-
External and internal radiation doses due to alpha activity in Tafila district, Jordan
Tafila district of Jordan is unique in the presence of phosphate mines and hot spa which are the major sources of natural radioactivity. Natural radionuclides transfer from soil to vegetables grown in the region, and become a part of people's food. In this study, 16 soil and vegetable samples from Tafila district were collected from eight locations. External absorbed dose rates were calculated to ...
-
INAA and AAS study of essential trace elements in ayurvedic Indian medicinal plants
Specific parts (leaves and fruits) of different medicinal plants often used in Indian ayurvedic system were analysed for 18 elements (K, Mn, Na, Fe, Zn, Cu, Co, Br, Sm, Cl, La, Al, Cr, Ca Cd, Ni, Pb and Hg) by employing instrumental neutron activation analysis (INAA) and atomic absorption spectroscopy (AAS) techniques. The samples were irradiated with thermal neutrons in a nuclear reactor and the ...
-
The effective dose to the public of Kerman province from gamma emitter terrestrial radionuclides
The concentration of the most important terrestrial radionuclides in soil that constitute significant components of the background exposure source of the population, such as 238U, 232Th and 40K, were measured by gamma spectrometry in 58 surface soil samples in Kerman province, Iran. The average activity concentrations were found to be 23.8 ± 3.6, 28.8 ± 4.3 and 489.6 ± 48.9 Bq kg−1, respectively. ...
-
Interactions of Haptoglobin with Monomeric Globin Species: Insights from Molecular Modeling and Native Electrospray Ionization Mass Spectrometry
Haptoglobin (Hp) binds free hemoglobin (Hb) dimers to prevent negative consequences of Hb circulation in the extracellular environment. Although both monomeric Hb and myoglobin (Mb) species also present potential risks, their interactions with Hp have not been extensively studied. Mb is homologous to both the α- and β-chains of Hb and shares many conserved Hb/Hp interface residues, yet ...
-
Assessment of radiation dose due to natural radionuclides in various cement samples
Samples of Ordinary Portland Cement (OPC) and Portland Pozzolana Cement (PPC) from five companies were analysed for the measurement of 226Ra, 232Th and 40K using a HPGe detector based on highresolution gamma spectrometry system. The measured activity in the selected OPC cement samples varies from 19.24 Bq kg?1 (JK Laxmi) to 40.73 Bq kg?1 (JayPee), 29.49 Bq kg?1 (JK Laxmi) to 42.17 Bq kg?1 ...
-
Radioactivity and hydrochemical properties of certain thermal Turkish spa waters
The study aims to determine the radioactivity levels of thermal waters which have been used seasonally or permanently in spas for therapeutic intentions. Samples were collected from spas in different regions of Turkey. Some radionuclides (40K, 232Th, 226Ra, 137Cs), gross alpha (GA) and gross beta (GB) activities, and physical and some chemical parameters were measured. Gamma radiation ...
-
Beneficial Effects of Akkermansia muciniphila are not Associated with Major Changes in the Circulating Endocannabinoidome but Linked to Higher Mono-Palmitoyl-Glycerol Levels as New PPAR Agonists.
Abstract: Akkermansia muciniphila is considered as one of the next-generation beneficial bacteria in the context of obesity and associated metabolic disorders. Although a first proof-of-concept of its ben eficial effects has been established in the context of metabolic syndrome in humans, mechanisms are not yet fully understood. This study aimed at deciphering whether the bacterium exerts its ...
By A-Mansia
-
Gamma radiolysis of ceftriaxone sodium for water treatment: assessments of the activity
As large quantities of antibiotics have been misused in human and veterinary medicine, many different classes of antibiotics with low concentration have been detected in the environmental water. This existence may cause severe ecosystem alterations. Ceftriaxone sodium was employed as the targeted antibiotic to evaluate gamma radiolysis of antibiotics based on the primary elimination test and ...
-
Ukas accredited laboratory manages its own configurations of Matrix Gemini LIMS case study
By working closely with Autoscribe on the upgrade of Matrix 4 to Matrix Gemini, staff at Cavendish Nuclear's environmental laboratory have become so proficient in using Gemini's one-time configuration tools that they manage and implement any updates and developments to their own system as their needs arise. Background Cavendish Nuclear's environmental laboratory is an internationally recognised ...
-
Counting solutions LSC technical tips from PerkinElmer
The advance of the nuclear industry in all its forms coupled with growing concerns for possible environmental contamination has led to an increased interest in the quantification of radioisotopes in the environment. Radionuclides currently present in the environment originate from a variety of sources such as fallout from nuclear weapons testing, and in discharges from both nuclear and ...
-
Matrix Gemini LIMS meets radiological testing challenges case study
The inherent configurability of the Matrix Gemini Laboratory Information Management System (LIMS) has allowed the management of complex radiochemistry data at a radiological, environmental and analytical laboratory in Oak Ridge, Tennessee. The Matrix system has streamlined the analysis process and has added a very versatile reporting system. Background The laboratory carries out radioanalytical ...
-
Researchers discover high uranium levels in south India groundwater
The uranium isotopes during their course of their disintegration decay into other radioactive elements and eventually decay into stable lead isotopes. The cause of environmental concern is the emanation of beta and gamma radiation during disintegration. The present study tends to estimate uranium in groundwater trapped in granite and gneiss rocks. Besides, the study aims at estimating the ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you