The Guelph PIXE software package

Maxwell, J.A.; Campbell, John L.; Teesdale, W.J.

doi:10.1016/0168-583x(89)90042-6

Cited by 615 publications

(151 citation statements)

References 17 publications

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“…Elemental maps were produced by creating windows on specific X-ray peaks using the Oxford Microbeams OMDAQ software package (Grime & Dawson 1995). Elemental molar ratios were obtained by fitting the X-ray spectra using the GUPIX software package (Maxwell et al 1989). A 130 mm Be filter was fitted over the Si(Li) detector window to avoid the degradation of the detector performance caused by highenergy recoiling protons entering the detector.…”

Section: Methodsmentioning

confidence: 99%

Calcification provides mechanical reinforcement to whale baleen α-keratin

et al. 2010

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Hard a-keratins such as hair, nail, wool and horn are stiff epidermal appendages used by mammals in a variety of functions including thermoregulation, feeding and intraspecific competition. Hard a-keratins are fibre-reinforced structures consisting of cytoskeletal elements known as 'intermediate filaments' embedded in an amorphous protein matrix. Recent research has shown that intermediate filaments are soft and extensible in living keratinocytes but become far stiffer and less extensible in keratinized cells, and this stiffening may be mediated by air-drying. Baleen, the keratinous plates used by baleen whales during filter feeding, is an unusual mammalian keratin in that it never air dries, and in some species, it represents the most heavily calcified of all the hard a-keratins. We therefore tested the hypothesis that whale baleen is stiffened by calcification. Here, we provide, to our knowledge, the first comprehensive description of baleen material properties and show that calcification contributes to overcoming the shortcomings of stiffening this hard a-keratin without the benefit of air-drying. We also demonstrate striking interspecies differences in the calcification patterns among three species of baleen whales and provide novel insights into the function and evolution of this unusual biomaterial.

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Section: Methodsmentioning

confidence: 99%

Calcification provides mechanical reinforcement to whale baleen α-keratin

et al. 2010

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“…X-ray spectra obtained from the PIXE measurements were analyzed with GUPIX software developed by Guelph University (Maxwell et al, 1989(Maxwell et al, , 1995. Concentration of the following twenty elements were measured and analyzed for each sample: Al, As, Br, Ca, Cl, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, Pb, S, Si, Ti, V and Zn.…”

Section: Elemental Analysismentioning

confidence: 99%

A Long Term Study on Characterization and Source Apportionment of Particulate Pollution in Klang Valley, Kuala Lumpur

Rahman

Hamzah

Elias

et al. 2015

Aerosol Air Qual. Res.

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Samples of airborne particulate matter, PM 2.5 and PM 10-2.5 were collected using a Gent stacked filter sampler at an urban site, Klang Valley, Kuala Lumpur between January 2002-December 2011. The samples were analyzed for their elemental composition and black carbon content by Particle Induced X-ray Emission (PIXE) and light absorption, respectively. The annual average for PM 2.5 , PM 10-2.5 and PM 10 ranged from 21 to 35, 18 to 26 and 44 to 56 µg m -3 , respectively. Factor analysis method and the Positive Matrix Factorisation (EPA PMF3) technique were also applied to the fine fraction data set in order to identify the possible sources of particulate matter and their contributions to the ambient particulate matter concentrations in the Klang Valley. A five factor PMF solution was found for PM 2.5 particulate matter. The sources identified were; motor vehicles, industry, smoke/biomass burning, secondary sulphate and soil. It was found that the primary source of haze air particulate matter was locally generated mostly from vehicular emissions which contribute about 35% of the PM 2.5 mass. The Hybrid Single Particle Lagrangian Intergrated Trajectory (HYSPLT) model was also used to explore possible long range transport of pollution. Smoke trans-boundary events were identified based on fine potassium from the data base in 2004, 2006 and 2008.

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“…For Rutherford backscattering spectroscopy (RBS) and particle-induced x-ray emission spectroscopy (PIXE), several well established software products, such as SIMNRA [1], WinNDF [2] and GUPIX [3], are available. For heavy ion elastic recoil detection analysis (HI-ERDA) some analysis software has been proposed [4], but most of the laboratories are still using in-house developed or non-public software which generally cannot offer a traceable analysis path.…”

Section: Introductionmentioning

confidence: 99%

Potku – New analysis software for heavy ion elastic recoil detection analysis

Arstila

Julin

Laitinen

et al. 2014

Nuclear Instruments and Methods in Physics Research Section B:

166

104

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Time-of-flight elastic recoil detection (ToF-ERD) analysis software has been developed. The software combines a Python-language graphical front-end with a C code computing back-end in a user-friendly way. The software uses a list of coincident time-offlight-energy (ToF-E) events as an input. The ToF calibration can be determined with a simple graphical procedure. The graphical interface allows the user to select different elements and isotopes from a ToF-E histogram and to convert the selections to individual elemental energy and depth profiles. The resulting sample composition can be presented as relative or absolute concentrations by integrating the depth profiles over user-defined ranges. Beam induced composition changes can be studied by displaying the eventbased data in fractions relative to the substrate reference data. Optional angular input data allows for kinematic correction of the depth profiles. This open source software is distributed under the GPL license for Linux, Mac, and Windows environments.

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The Guelph PIXE software package

Cited by 615 publications

References 17 publications

Calcification provides mechanical reinforcement to whale baleen α-keratin

Calcification provides mechanical reinforcement to whale baleen α-keratin

A Long Term Study on Characterization and Source Apportionment of Particulate Pollution in Klang Valley, Kuala Lumpur

Potku – New analysis software for heavy ion elastic recoil detection analysis

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