Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Mihai R Gherase"'
Autor:
Mihai R. Gherase
Publikováno v:
Metrology, Vol 3, Iss 4, Pp 325-346 (2023)
Human bones store elements such as calcium, phosphorus, and strontium, and accumulate toxic elements such as lead. In vivo measurements of elemental bone concentration can be done using X-ray fluorescence (XRF) techniques. Monte Carlo (MC) simulation
Externí odkaz:
https://doaj.org/article/8b342f45fd1c4328a5bea4dd5938d4d8
Autor:
Mihai R. Gherase, David E. B. Fleming
Publikováno v:
Crystals, Vol 10, Iss 1, p 12 (2019)
For the past several decades, synchrotron radiation has been extensively used to measure the spatial distribution and chemical affinity of elements found in trace concentrations (
Externí odkaz:
https://doaj.org/article/ef43373daf784c078afc6f3d88267ba7
Publikováno v:
X-Ray Spectrometry. 46:537-547
Closely related toxicity and retention mechanisms of lead (Pb) in the human body involve the bone tissues where Pb can accumulate and reside on a time scale ranging from years to tens of years. In vivo measurements of bone Pb can, therefore, play an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::253506ea5657276e4cb5be9c32eda3cc
https://doi.org/10.1002/xrs.2792
https://doi.org/10.1002/xrs.2792
Autor:
Mihai R. Gherase, David R. Chettle, Fiona E. McNeill, E. Desouza, David E.B. Fleming, J. M. O'Meara
Publikováno v:
Applied Radiation and Isotopes. 123:82-93
The Figure-Of-Merit (FOM) performance, a combination of detection limit and dose, is compared between two generations of handheld X-Ray Fluorescence (XRF) spectrometers for the feasibility of in vivo XRF measurement of arsenic (As) in skin. The Olymp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2117d432a8a6c1ab704ee80357bf6ccb
https://doi.org/10.1016/j.apradiso.2017.02.029
https://doi.org/10.1016/j.apradiso.2017.02.029
Autor:
Mihai R. Gherase, Andres Felipe Vargas
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 395:5-12
Size measurements of an X-ray beam produced by an integrated polycapillary X-ray lens (PXL) and X-ray tube system were performed by means of a scanning X-ray fluorescence (SXRF) method using three different metallic wires. The beam size was obtained
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72a4a2d34cc988090637c338f0542100
https://doi.org/10.1016/j.nimb.2017.01.045
https://doi.org/10.1016/j.nimb.2017.01.045
Publikováno v:
Physiol Meas
Objective. Lead (Pb) is a well-known toxic element. In vivo bone Pb concentration measurement is a long-term exposure metric complementary to blood Pb concentration measurement which is a metric of recent exposure. In vivo human tibia bone Pb measure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::027139b969628b7ec44ce5652719117e
https://doi.org/10.1088/1361-6579/abf886
https://doi.org/10.1088/1361-6579/abf886
Soft tissue measurement of arsenic and selenium in an animal model using portable X-ray fluorescence
Autor:
Olena Ponomarenko, Selim Ahmed, John W. Groves, Mohammad Alauddin, Julian E. Spallholz, David E.B. Fleming, Graham N. George, Mihai R. Gherase, Paul F. La Porte, George Langan, Habibul Ahsan, Ingrid J. Pickering
Publikováno v:
Radiation Physics and Chemistry. 116:241-247
The ingestion of trace amounts of arsenic (As) through drinking water is a relatively common pathway of exposure with potentially serious long-term health effects. Studies involving animal models have indicated that selenium (Se) may bind with As ins
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ed4eee23a13563f64b2cdc0f4d9e5a7
https://doi.org/10.1016/j.radphyschem.2015.06.007
https://doi.org/10.1016/j.radphyschem.2015.06.007
Autor:
David E.B. Fleming, Fiona E. McNeill, Chang Yong Kim, Michael J. Farquharson, Mihai R. Gherase, E. Desouza
Publikováno v:
Physiological Measurement. 34:1163-1177
Arsenic (As) distribution in nail clippings from three healthy human subjects was investigated using the microbeam experimental setup of the hard x-ray micro-analysis (HXMA) beamline from the Canadian Light Source (CLS) synchrotron. A pair of toenail
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d27eaafb86f1edd46041d4a2d1e9b6f
https://doi.org/10.1088/0967-3334/34/9/1163
https://doi.org/10.1088/0967-3334/34/9/1163
Publikováno v:
X-Ray Spectrometry. 42:299-302
A calibration method was developed to assess elemental concentrations in nail clippings, using a portable X-ray fluorescence (XRF) device. Specifically, manganese and zinc were investigated in this study. Two sets of phantom nail clipping samples wer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::910b5e43fb949d171de1550fc367a24a
https://doi.org/10.1002/xrs.2474
https://doi.org/10.1002/xrs.2474
Publikováno v:
Physiological measurement. 38(2)
The differences and commonalities between x-ray fluorescence results obtained using synchrotron radiation and a portable x-ray fluorescence device were examined using arsenic in soft tissue phantoms and lead in bone phantoms. A monochromatic beam ene
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa05382bf985e02d64f05c95627924a2
https://pubmed.ncbi.nlm.nih.gov/28134135
https://pubmed.ncbi.nlm.nih.gov/28134135