Search results for: Uwe Oeh

Items from 1 to 13 out of 13 results

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Daily urinary excretion of uranium in members of the public of Southwest Nigeria

Vera Höllriegl, Adeseye M. Arogunjo, Augusto Giussani, Bernhard Michalke, more

Science of the Total Environment > 2011 > 412-413 > Complete > 344-350

The main aim of this study was to determine and evaluate urinary excretion values of uranium in members of the public of Southwest Nigeria living in areas of low environmental uranium. As several uranium mines are running in Nigeria and the operations could be a risk of contamination for the workers as well as for the members of the public, biomonitoring of urine could provide information about the...

article

Human biokinetic data and a new compartmental model of zirconium — A tracer study with enriched stable isotopes

Matthias B. Greiter, Augusto Giussani, Vera Höllriegl, Wei Bo Li, more

Science of the Total Environment > 2011 > 409 > 19 > 3701-3710

Biokinetic models describing the uptake, distribution and excretion of trace elements are an essential tool in nutrition, toxicology, or internal dosimetry of radionuclides. Zirconium, especially its radioisotope ⁹⁵ Zr, is relevant to radiation protection due to its production in uranium fission and neutron activation of nuclear fuel cladding material. We present a comprehensive set of human...

article

Method development for thermal ionization mass spectrometry in the frame of a biokinetic tracer study with enriched stable isotopes of zirconium

Matthias B. Greiter, Vera Höllriegl, Uwe Oeh

International Journal of Mass Spectrometry > 2011 > 304 > 1 > 1-8

Isotope dilution in thermal ionization mass spectrometry (ID-TIMS) is a precise method for quantification of isotope ratios in geological samples, or for trace elements analysis in geological and environmental samples. This work presents an optimized ID-TIMS method for application in the field of life sciences, more precisely in the frame of a human biokinetic study on zirconium with oral and intravenous...

article

Solubility of uranium and thorium from a healing earth in synthetic gut fluids: A case study for use in dose assessments

Vera Höllriegl, Wei Bo Li, Karsten Leopold, Udo Gerstmann, more

Science of the Total Environment > 2010 > 408 > 23 > 5794-5800

The aim of this case study was to estimate the bioaccessibility of uranium ( ²³⁸ U) and thorium ( ²³² Th) from a healing earth by analysing the solubility of these radionuclides in synthetic gastric and intestinal fluids. An easy applicable in vitro test system was used to investigate the fractional mobilization of the soil contaminants being potentially available for absorption under...

article

Multidimensional statistical analysis of PTR-MS breath samples: A test study on irradiation detection

Mattia Fedrigo, Christoph Hoeschen, Uwe Oeh

International Journal of Mass Spectrometry > 2010 > 295 > 1-2 > 13-20

A multidimensional statistical analysis of data obtained from breath gas measurements with Proton Transfer Reaction-Mass Spectrometry (PTR-MS) is proposed, based on a chemical-diffusion equilibrium approach. The proposed methodology is developed and demonstrated on the problem of detecting exposure of human beings to ionizing radiation. It could be applied to a general family of non-invasive, high-throughput,...

article

Measurement of cerium in human breast milk and blood samples

Vera Höllriegl, Montserrat González-Estecha, Elena M. Trasobares, Augusto Giussani, more

Journal of Trace Elements in Medicine and Biology > 2010 > 24 > 3 > 193-199

The aim of this study was to evaluate the relationship between cerium content in human breast milk and blood plasma or serum. Blood samples and breast milk at various stages of lactation, from 5 days to 51 weeks post partum, were donated by 42 healthy breast-feeding mothers from Munich, Germany and by 26 lactating Spanish mothers from Madrid at 4 weeks post partum. Inductively coupled plasma mass...

article

Influence of human biokinetics of strontium on internal ingestion dose of ⁹⁰Sr and absorbed dose of ⁸⁹Sr to organs and metastases

Wei Bo Li, Vera Höllriegl, Paul Roth, Uwe Oeh

Radiation and Environmental Biophysics > 2008 > 47 > 2 > 225-239

The objective of the present work is to apply the plasma clearance parameters to strontium, previously determined in our laboratory, to improve the biokinetic and dosimetric models of strontium-90 (⁹⁰Sr) used in radiological protection; and also to apply this data for the estimation of the radiation doses from strontium-89 (⁸⁹Sr) after administration to patients for the treatment of the painful bone...

article

Investigations on the solubility of corrosion products on depleted uranium projectiles by simulated body fluids and the consequences on dose assessment

Udo C. Gerstmann, Wilfried Szymczak, Vera Höllriegl, Wei Bo Li, more

Radiation and Environmental Biophysics > 2008 > 47 > 2 > 205-212

Ingestion and inhalation of corrosion products covering weathered penetrators made of depleted uranium (DU) represent potential radiological exposure pathways. In order to study the bioavailability of these corrosion products, their solubility was determined using simulated gastric and pulmonary juices. About 75 and 36% of the uranium in the corrosion products were found to be soluble in simulated...

article

Internal dose assessment of ²¹⁰Po using biokinetic modeling and urinary excretion measurement

Wei Bo Li, Udo Gerstmann, Augusto Giussani, Uwe Oeh, more

Radiation and Environmental Biophysics > 2008 > 47 > 1 > 101-110

The mysterious death of Mr. Alexander Litvinenko who was most possibly poisoned by Polonium-210 (²¹⁰Po) in November 2006 in London attracted the attention of the public to the kinetics, dosimetry and the risk of this high radiotoxic isotope in the human body. In the present paper, the urinary excretion of seven persons who were possibly exposed to traces of ²¹⁰Po was monitored. The values measured...

article

Human biokinetics of strontium—part II: Final data evaluation of intestinal absorption and urinary excretion of strontium in human subjects after stable tracer administration

Vera Höllriegl, Wei Bo Li, Uwe Oeh

Radiation and Environmental Biophysics > 2006 > 45 > 3 > 179-185

Fractional intestinal absorption (f ₁ value) and urinary excretion of strontium in healthy human volunteers has been measured by simultaneous oral and intravenous administration of the stable isotopes ⁸⁶Sr and ⁸⁴Sr using the double-isotope method. Final evaluation of the complete data set confirmed that ingestion of different foodstuff and nutritional factors could influence the fractional gut uptake...

article

Human biokinetics of strontium. Part I: Intestinal absorption rate and its impact on the dose coefficient of ⁹⁰Sr after ingestion

Wei Bo Li, Vera Höllriegl, Paul Roth, Uwe Oeh

Radiation and Environmental Biophysics > 2006 > 45 > 2 > 115-124

Intestinal absorption of strontium (Sr) in thirteen healthy adult German volunteers has been investigated by simultaneous oral and intravenous administration of two stable tracer isotopes, i.e. ⁸⁴Sr and ⁸⁶Sr. The measured Sr tracer concentration in plasma was analyzed using the convolution integral technique to obtain the intestinal absorption rate. The results showed that the Sr labeled in different...

article

Biokinetic modeling of uranium in man after injection and ingestion

Wei Bo Li, Paul Roth, Wolfgang Wahl, Uwe Oeh, more

Radiation and Environmental Biophysics > 2005 > 44 > 1 > 29-40

Uranium is a naturally occurring primordial radioactive element. Small amounts found in air, water, and food are regularly consumed and inhaled by humans. Even the military, medical, and industrial use of depleted uranium can affect humans. There is an appreciable retention of incorporated uranium in skeleton, kidneys, and liver, and a review of respective effective dose coefficients has been given...

article

Juvenile hormone biosynthesis in the fall armyworm, Spodoptera frugiperda (Lepidoptera, Noctuidae)

Sebastian Range, Uwe Oeh, Matthias W. Lorenz, Winfried Etzel, more

Comparative Biochemistry and Physiology, Part B > 2002 > 132 > 1 > 191-202

The in vitro production of juvenile hormones (JH) was investigated by using corpora allata (CA) of larvae and corpora cardiaca-corpora allata (CC-CA) complexes of adult females of the fall armyworm Spodoptera frugiperda. In female moths, JH release was high compared to that in 5th and 6th instar larvae. Concentrations of 0.11-0.12 mM methionine, 180-200 mM Na ⁺ , 5.8-8.3 mM K ⁺ , 10-50...

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Keywords

BLOOD PLASMA (2)
HUMANS (2)
INGESTION (2)
URANIUM (2)
BIOACCESSIBILITY (1)
BIOKINETIC MODEL (1)
BREAST MILK (1)
BREATH GAS VOC (1)
CERIUM (1)
CORPORA ALLATA (1)
CREATININE (1)
DETECTION OF EXPOSURE (1)
DOSE ASSESSMENTS (1)
FRACTIONAL ABSORPTION (1)
HIGH PERFORMANCE LIQUID CHROMATOGRAPHY (1)
HUMAN TRACER STUDY (1)
ICP-MS (1)
ISOTOPE DILUTION (1)
JUVENILE HORMONE DIOLS (1)
MASS SPECTROMETRY (1)
MULTIDIMENSIONAL ANALYSIS (1)
NIGERIA (1)
NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY (1)
PTR-MS (1)
RADIATION PROTECTION (1)
RADIOCHEMICAL PARTITION ASSAY (1)
SOIL (1)
SPODOPTERA FRUGIPERDA (1)
STABLE ISOTOPES (1)
STABLE ZIRCONIUM ISOTOPE (1)
THERMAL IONIZATION (1)
THORIUM (1)
URINARY EXCRETION (1)
URINE (1)
ZIRCONIUM (1)
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Elsevier (7)
Springer (6)

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Search results for: Uwe Oeh

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