نتایج جستجو برای: pixe

تعداد نتایج: 469  

Journal: :Journal of physics 2022

Abstract To extract information on elemental components and PM characteristics from smoke number (SN) filter paper, we were performed analysis by micro-PIXE. As a result of the SN filter, composition jet engine exhaust was obtained. Regarding have been collected for each difference in thrust various aircraft engines at turbine test cells around world. By periodically analyzing such it is possib...

2002
J. Absil D. Strivay C. Oger

The particle induced X-ray emission method is perfectly adapted to the study, by external beam, of art objects (like paintings) and allows non-destructive analysis of the atomic composition of the target. However, a strange phenomenon occurs during irradiation on some pigments: dark brownish stains appear, and this could be due to the formation of color centers. In fact, these darkening spots p...

داوود آقاعلی گل علی باقی زاده فرح شکوهی محمد فرمهینی فراهانی محمد لامعی رشتی محمدرضا کتابداری محمود مرادی پروین اولیائی

در این مقاله توزیع عنصر اورانیوم و عناصر دیگر موجود در کانی‌های اورانیوم‌دار در مقیاس میکرونی با استفاده از میکروسکوپ روبشی پروتون (Micro-PIXE) بررسی شده است. با استفاده از توزیع عنصری بدست آمده برای عناصر موجود در کانی‌ها، همبستگی توزیع عنصر اورانیوم و عناصر دیگر موجود در نمونه‌ها مشخص شده است. این نتایج نشان می‌دهد که در این کانی‌ها، کانی‌های اورانیوم‌دار با کانی‌های آهن احاطه شده‌اند. همچنین...

Journal: :Journal of agricultural and food chemistry 2001
G Takeoka L Dao R Y Wong R Lundin N Mahoney

Commercial grapefruit seed extracts (GSE) were extracted with chloroform. The solvent was evaporated, and the resulting solid was subsequently analyzed by high-performance liquid chromatography, electrospray ionization mass spectrometry, nuclear magnetic resonance (NMR) spectroscopy, and elemental analysis (by proton-induced X-ray emission [PIXE] analysis). The main constituent was identified a...

Journal: :Journal of environmental radioactivity 2008
H Erramli H D Gogon M A Misdaq T Sauvage C Ramboz

In this work, PIXE experiments were performed for measuring heavy and light elements' (ranging from aluminium to lead) concentrations inside various polluted and unpolluted soils as well as liquid samples collected from different phosphate factory sewers in the El Jadida-Safi Atlantic coastal region (Morocco). In addition, uranium ((238)U) and thorium ((232)Th) contents were evaluated in the sa...

Journal: :Analytical and bioanalytical chemistry 2017
Markus Puschenreiter

accumulation, 71, 110, 111 non-ideal, 81 agarose, 33, 35, 44 pore size, 59 alkalinity, 35, 176, 183 aluminium, 44, 67, 176, 238 ammonia, 35, 176 ammonium persulphate, 33, 266 analytical techniques, 285 colorimetry, 181–182 computer imaging densitometry (CID), 181–182, 185, 202, 285 hyperspectral imaging, 182 laser ablation – ICPMS, 185–188, 285 PIXE, 175, 176 antimony, 44, 67, 135 area of windo...

Journal: :Environmental monitoring and assessment 2015
Paula Madejón Manuel Cantos María C Jiménez-Ramos Teodoro Marañón José M Murillo

Seed germination is considered a critical phase in plant development and relatively sensitive to heavy metals. White poplar (Populus alba) trees tend to accumulate Cd and Zn in their tissues. We tested if soil contamination can affect P. alba progeny, reduced seed germination and explored the distribution of mineral elements in the seed. For this purpose, fruits and seeds from female P. alba tr...

2015
M. A. Barreiros V. Corregidor L. C. Alves F. Guimarães J. Mascarenhas E. Torres M. J. Brites

Dye sensitized solar cells (DSCs) have received considerable attention once this technology offers economic and environmental advantages over conventional photovoltaic (PV) devices. The PV performance of a DSC relies on the characteristics of its photoanode, which typically consists of a nanocrystalline porous TiO2 film, enabled with a large adsorptive surface area. Dye molecules that capture p...

Journal: :Investigative ophthalmology & visual science 2002
Marina G Yefimova Jean-Claude Jeanny Nicole Keller Claire Sergeant Xavier Guillonneau Carole Beaumont Yves Courtois

PURPOSE To determine whether iron homeostasis disorder accompanies retinal degeneration in Royal College of Surgeons (RCS) rats. METHODS The presence of iron was revealed directly by proton-induced X-ray emission (PIXE) and indirectly by electron microscopy (EM). Ferritin, transferrin (Tf), and transferrin receptor (Tf-R) were localized by immunohistochemistry. Ferritin and Tf proteins were a...

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