Solid – liquid – vapor fluid inclusions in spodumene in rare-element granitic pegmatites commonly contain one or more highbirefringence minerals. Optical examination and laser Raman spectroscopic analyses of over 500 crystal-rich fluid inclusions in spodumene from Bikita and Kamativi, Zimbabwe, and Bernic Lake (Tanco), Manitoba, indicate that the high-birefringence phase is zabuyelite (Li2CO3)....

Keywords: multi-walled carbon nanotubes (MWCNT), iridium-doped, nanohybrid composite, Raman spectrum, energy-dispersive X-ray spectroscopy Multi-walled have been prepared by chemical vapour deposition pyrolysis of ethyl alcohol at 665 °C. The addition atoms other than to the nanostructure, in our case iridium component, leads formation defects that contribute changes electrical and optoelectric...

Introduction: For over a decade, the oldest evidence for life on this planet has been microfossils in the 3.5 Ga Apex Chert in Western Australia [1]. Recently, the biogenicity of these carbon-rich structures has been called into question through reanalysis of the local geology and reinterpretation of the original thin sections. Although initially described as a stratiform, bedded chert of silic...

High Temperature oxidation of Zircaloy-4 was studied in N2–O2–H2O gas mixtures using labelled 18O2, thermogravimetry, Raman imaging and mass spectrometry. Samples were either exposed to N2–18O2–H2O mixtures, or two-stage oxidised first then H216O - N2 16O2 atmospheres. In the pre-transition, diffusion-controlled regime, mostly steam contributes zirconia formation, while nitrogen-catalysed post ...

Abstract The church of San Francesco del Prato in Parma (Italy) is a masterpiece the Gothic style, dated back to 13th century. However, its historical and monumental value could not be appreciated for long time, especially due transformation building into city jail. recent restoration works brought light valuable frescos wall paintings belonging different periods. An situ campaign was performed...

Handheld Raman spectroscopy offers a rapid and mobile technique for determining drugs nondestructively. The further advantage analyzing drug products (DPs) thanks to its ability measure samples through packaging, thus preserving evidence integrity continuity. This research evaluated the use of handheld Fourier transform (FT)-Raman characterization street DPs (n = 254) diverse formulations. spec...

Improving the lipid composition of feed-rotifers enhances survival and growth rates juvenile fish in aquaculture, but monitoring enrichment profiles using gas chromatography (GC) is slow, labour-intensive requires expensive instrumentation. Here, we describe potential Raman spectroscopy as an alternative, more rapid tool for quantitation rotifer fatty acid aquaculture setting. A compositionally...

Optical and structural properties of in situ Cu doped GaN thin films grown on sapphire substrates were optically investigated by means of Raman, photoluminescence (PL), and absorption spectroscopy. Different Cu concentrations in the films were analyzed by secondary ion mass spectroscopy (SIMS) and found to vary from 2x10 cm to 5x10 cm. Raman studies confirmed high crystalline quality of GaN:Cu ...