Search results for: Bonnin-Mosbah

Items from 1 to 13 out of 13 results

article

Redox state of iron in peralkaline rhyolitic glass/melt: X-ray absorption micro-spectroscopy experiments at high temperature

N. Métrich, J. Susini, E. Foy, F. Farges, more

Chemical Geology > 2006 > 231 > 4 > 350-363

Assessing the ferric–ferrous ratio in magmas prior to eruption remains a challenging task. X-ray absorption near-edge structure (μXANES) spectra were collected at the iron K-edge in water-rich peralkaline silicic melt/glass inclusions trapped in quartz. These experiments were carried out between 800 and 20 °C. The chemical environment of iron was also determined in the naturally quenched samples (glass...

article

Nitrogen microanalysis of glass inclusions in chondritic olivines by nuclear reaction

Maria Eugenia Varela, Michelle Bonnin- Mosbah, Gero Kurat, Jean Paul Gallien

Geochimica et Cosmochimica Acta > 2003 > 67 > 6 > 1255-1265

Measured were the abundance and distribution of nitrogen in glasses of glass inclusions in olivines of CV3, CO3, CR, C4, CH3, and LL chondritic meteorites by means of the ¹ ⁴ N(d, p) ¹ ⁵ N nuclear reaction. Similar to what was observed with carbon, nitrogen is present in low concentrations (<20 ppm) in the structure of olivines but can by stored in variable amounts in glasses...

article

Biological fluxes conversion and SXRF experiment with a new active biomonitoring tool for atmospheric metals and trace element deposition

G. Amblard-Gross, J.F. Férard, F. Carrot, M. Bonnin-Mosbah, more

Environmental Pollution > 2002 > 120 > 1 > 47-58

A new active biomonitoring tool, keeping alive mosses for 2 months, had demonstrated the buffering action of the water presence on the biological activity of three moss species (chlorophyll fluorescence induction method on Pleurozium schreberi, Scleropodium purum, Eurhynchium praelongum). The two more resistant mosses were exposed on four different sites with parallel exposure of monthly bulk collectors...

article

Micro X-ray absorption near edge structure at the sulfur and iron K-edges in natural silicate glasses

M. Bonnin-Mosbah, N. Métrich, J. Susini, M. Salomé, more

Spectrochimica Acta Part B: Atomic Spectroscopy > 2002 > 57 > 4 > 711-725

Both sulfur and iron chemical environments were studied in natural compounds; sulfides, sulfates and silicate basaltic glasses which are supposed to have variable oxidation states, using XANES (X-ray absorption near edge structure) spectroscopy. Although X-ray absorption methods are well suited for such investigations, the size of natural glass inclusions trapped in volcanic minerals, ranging from...

article

Analysis of individual fluid inclusions using synchrotron X-ray fluorescence microprobe: progress toward calibration for trace elements

Bénédicte Ménez, Pascal Philippot, Michelle Bonnin-Mosbah, Alexandre Simionovici, more

Geochimica et Cosmochimica Acta > 2002 > 66 > 4 > 561-576

A critical problem for conducting quantitative analysis of individual fluid inclusions using Synchrotron X-Ray Fluorescence (SXRF) technique relates to the standardization and the calibration of the X-ray spectra. In this study, different approaches have been tested for calibration purposes: (a) the use of chlorine when Cl content can be estimated either from melting point depressions of undersaturated...

article

Iron oxidation states in silicate glass fragments and glass inclusions with a XANES micro-probe

Michelle Bonnin-Mosbah, Alexandre S. Simionovici, Nicole Métrich, Jean-Paul Duraud, more

Journal of Non-Crystalline Solids > 2001 > 288 > 1-3 > 103-113

The iron oxidation states and its environment in volcanic silicate glasses have been studied by combining micro-X-ray absorption near edge structure (XANES) experiments at the iron K-edge in silicate glass fragments and glass inclusions trapped during the crystal growth. Experiments were performed at the ESRF (ID22 beam-line) - a third generation synchrotron - using a focused beam (2x10μm ² ...

article

Austenitic steel corrosion in IGCC environment. Characterisation by photon and nuclear microprobes

Philippe Dillmann, Katia Weulersse, Belkacem Regad, Gérard Moulin, more

Nuclear Inst. and Methods in Physics Research, B > 2001 > 181 > 1-4 > 734-738

An austenitic steel sample was treated simulating particular working conditions of an integrated gasification combined cycle (IGCC) power plant. Several classical characterisation techniques were used to investigate the oxide scales. In addition, micro-particle-induced X-ray emission (PIXE) and Rutherford backscattering spectrometry (RBS) analyses were performed and permit us to identify several phases...

article

Iron distribution in cancer cells following doxorubicin exposure using proton and X-ray synchrotron radiation microprobes

R. Ortega, G. Devès, S. Bohic, A. Simionovici, more

Nuclear Inst. and Methods in Physics Research, B > 2001 > 181 > 1-4 > 480-484

Chemical studies have shown that doxorubicin, a well-established anticancer agent, is a powerful iron chelator and the resultant iron–drug complex is an efficient catalyst of the conversion of hydrogen peroxide to the highly reactive hydroxyl radical. However, the intracellular complexation of doxorubicin with iron is still debated. Using nuclear microprobe analysis (NMPA), we previously observed...

article

Chromium mapping in male mice reproductive glands exposed to CrCl3 using proton and X-ray synchrotron radiation microbeams

R. Ortega, G. Devès, M. Bonnin-Mosbah, M. Salomé, more

Nuclear Inst. and Methods in Physics Research, B > 2001 > 181 > 1-4 > 485-488

Preconception exposure to certain chemicals may increase risk of tumors in offspring, especially with regard to occupational metals such as chromium. However, the mechanism of chromium trans-generation carcinogenicity remains unknown. Using scanning proton X-ray microanalysis we have been able to detect chromium in testicular tissue sections from mice treated by intraperitoneal injection of 1 mmol/kg...

article

Editorial

Ph Moretto, M Bonnin-Mosbah

Nuclear Inst. and Methods in Physics Research, B > 2001 > 181 > 1-4 > vii-viii

article

Fluid inclusions in quartz from oceanic hydrothermal specimens and the Bingham, Utah porphyry-Cu deposit: a study with PIXE and SXRF

David A. Vanko, Michelle Bonnin-Mosbah, Pascal Philippot, Edwin Roedder, more

Chemical Geology > 2001 > 173 > 1-3 > 227-238

Individual natural fluid inclusions in quartz were selected for non-destructive microprobe analysis by synchrotron X-ray fluorescence (SXRF) and proton-induced X-ray emission (PIXE) in order to compare and contrast the compositions of porphyry-type ore forming brines and two types of ocean crustal brines. The inclusions contained brines with high salt concentrations (typically 20-40 wt.% total), and...

article

Carbon in glass inclusions of Allende, Vigarano, Bali, and Kaba (CV3) olivines

Maria Eugenia Varela, Nicole Metrich, Michelle Bonnin–Mosbah, Gero Kurat

Geochimica et Cosmochimica Acta > 2000 > 64 > 22 > 3923-3930

Carbon contents and distribution have been measured in glass inclusions in olivines of CV3 carbonaceous chondrites by using the ¹² C(d,p) ¹³ C nuclear reaction. All olivines from the four studied meteorites had low carbon contents (<70 ppm). Conversely, glasses of glass inclusions in the same olivines had highly variable carbon contents, all above 100 ppm. Glass inclusions in olivines...

article

Fluid inclusion depth and thickness estimates using a Na nuclear reaction resonance and Si elastic scattering

Ménez, Philippot, Bonnin-Mosbah, Gibert

Nuclear Inst. and Methods in Physics Research, B > 1999 > 158 > 1-4 > 533-537

An important aspect of quantitative fluid inclusion analysis using X-ray emission techniques concerns a knowledge of fluid inclusion depth and geometry to establish reliable absorption correction procedures. The aim of this study is to assess the potential performance of the nuclear reaction ² ³ Na(p, p ^' γ) ² ³ Na in estimating inclusion depth. Na was chosen because...

Filter options

Publication date

Set your own date range

Keywords

IRON (3)
NUCLEAR MICROPROBE (2)
XANES (2)
AUSTENITIC STEELS (1)
BIOMONITORING (1)
CANCER (1)
CARCINOGENESIS (1)
CHROMIUM (1)
DOXORUBICIN (1)
ELASTIC SCATTERING (1)
FLUID INCLUSION (1)
FLUID INCLUSIONS (1)
GLASS (1)
GLASS INCLUSION (1)
HEAVY METALS (1)
HIGH TEMPERATURE CORROSION (1)
HYDROTHERMAL DEPOSITS (1)
IGCC (1)
MELT/GLASS INCLUSIONS (1)
MICRO-PIXE (1)
MICRO-SPECTROSCOPY (1)
MICRO-XANES (1)
MOSSES (1)
NUCLEAR REACTION ANALYSIS (1)
REDOX STATE (1)
SEDIMENTABLE PARTICLES (1)
SULFUR (1)
SXRF (1)
SYNCHROTRON (1)
SYNCHROTRON RADIATION (1)
X-RAY FLUORESCENCE (1)
X-RAY MICROPROBE (1)
XANES EXPERIMENTS (1)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 24.30.GD (1)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 25.40.CM (1)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 25.40.EP (1)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 61.10.HT (1)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 81.05.KF (1)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 91.40.-K (1)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 91.65.VJ (1)
more

INFONA - science communication portal

Search results for: Bonnin-Mosbah

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Keywords

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options