scholarly journals Historical glass mosaic tesserae: a multi-analytical approach for their characterization

2021 ◽  
Vol 136 (7) ◽  
Author(s):  
Giulia Marcucci ◽  
Antonella Scherillo ◽  
Carlo Cazzaniga ◽  
Quentin Lemasson ◽  
Roberto Lorenzi ◽  
...  
Keyword(s):  
Analytical Approach ◽  
Gamma Ray ◽  
Neutron Resonance ◽  
Quantitative Characterization ◽  
X Ray ◽  
Qualitative And Quantitative ◽  
Non Destructive ◽  
Neutron Resonance Capture Analysis ◽  
Mineralogical Phases

AbstractWe present a completely non-destructive approach to analyse a set of historical glass mosaic tesserae. Aim of the study is to obtain a qualitative and quantitative characterization of the glass matrix in terms of elements and mineralogical phases. Several non-destructive techniques have been applied like Particle-Induced X-ray Emission, Particle-Induced Gamma-ray Emission, micro-Raman spectroscopy, neutron resonance capture analysis and neutron activation analysis in order to combine different technique strengths and to explore the effect of different range sizes for the analysis. Yet, best practices require the use of combined analysis and different skills. The paradigm of a non-destructive multi-analytical approach is suggested for a comprehensive investigation in non-homogeneous real samples, like historical glass mosaic tesserae.

Synthesis of Polypropylene-Graft-Polycaprolactone by Melt-Grafting

2006 ◽  
Vol 11-12 ◽  
pp. 465-468
Author(s):  
Yuan Sui ◽  
Jian Ping Deng ◽  
Wan Tai Yang
Keyword(s):  
Fourier Transform ◽  
Thermogravimetric Analysis ◽  
Ftir Spectroscopy ◽  
1H Nmr ◽  
Graft Copolymerization ◽  
Quantitative Characterization ◽  
X Ray ◽  
Qualitative And Quantitative ◽  
Melt Grafting

Polypropylene (PP) was modified by melt graft copolymerization with ε-caprolactone (ε-CL) in the absence of initiator. Fourier transform infrared (FTIR) spectroscopy was used for qualitative and quantitative characterization of the reaction product. The graft copolymer was also characterized by 1H NMR, x-ray and thermogravimetric analysis (TG).

scholarly journals Graphene, an Interesting Nanocarbon Allotrope for Biosensing Applications: Advances, Insights, and Prospects

2021 ◽  
Vol 12 ◽  
pp. 117959722098382
Author(s):  
Farid Menaa ◽  
Yazdian Fatemeh ◽  
Sandeep K Vashist ◽  
Haroon Iqbal ◽  
Olga N Sharts ◽  
...  
Keyword(s):  
Cost Effective ◽  
Genetic Alterations ◽  
Multiplex Detection ◽  
Quantitative Characterization ◽  
Disease Biomarkers ◽  
Qualitative And Quantitative ◽  
Sensing Systems ◽  
Doped Graphene ◽  
Bioanalytical Applications

Graphene, a relatively new two-dimensional (2D) nanomaterial, possesses unique structure (e.g. lighter, harder, and more flexible than steel) and tunable physicochemical (e.g. electronical, optical) properties with potentially wide eco-friendly and cost-effective usage in biosensing. Furthermore, graphene-related nanomaterials (e.g. graphene oxide, doped graphene, carbon nanotubes) have inculcated tremendous interest among scientists and industrials for the development of innovative biosensing platforms, such as arrays, sequencers and other nanooptical/biophotonic sensing systems (e.g. FET, FRET, CRET, GERS). Indeed, combinatorial functionalization approaches are constantly improving the overall properties of graphene, such as its sensitivity, stability, specificity, selectivity, and response for potential bioanalytical applications. These include real-time multiplex detection, tracking, qualitative, and quantitative characterization of molecules (i.e. analytes [H2O2, urea, nitrite, ATP or NADH]; ions [Hg2+, Pb2+, or Cu2+]; biomolecules (DNA, iRNA, peptides, proteins, vitamins or glucose; disease biomarkers such as genetic alterations in BRCA1, p53) and cells (cancer cells, stem cells, bacteria, or viruses). However, there is still a paucity of comparative reports that critically evaluate the relative toxicity of carbon nanoallotropes in humans. This manuscript comprehensively reviews the biosensing applications of graphene and its derivatives (i.e. GO and rGO). Prospects and challenges are also introduced.

Electrochemical Dissolution of Goethite by Abrasive Stripping Voltammetry

1995 ◽  
Vol 60 (6) ◽  
pp. 950-959 ◽  
Author(s):  
Tomáš Grygar ◽  
Jan Šubrt ◽  
Jaroslav Boháček
Keyword(s):  
Solid Phase ◽  
Reaction Pathway ◽  
Stripping Voltammetry ◽  
Electrode Reaction ◽  
Reductive Dissolution ◽  
Quantitative Characterization ◽  
Acid Media ◽  
Qualitative And Quantitative ◽  
Spectroscopic Examination

Abrasive stripping voltammetry was applied to the investigation of the reductive dissolution of some iron(III) oxides and hydroxy-oxides, particularly goethite (α-FeOOH), in acid media. The electrode reaction directly involves the solid phase, and the reaction pathway depends on the phase composition and particle shape. This can be used for a qualitative and quantitative characterization of goethite. The results of a quantitative analysis of a mixture of goethite (α-FeOOH) and lepidocrocite (γ-FeOOH) are compared with those of IR and Moessbauer spectroscopic examination. The effects of the particle appearance (shape, crystal intergrowth) on the results of the voltammetric and chronoamperometric measurements are discussed.

scholarly journals Qualitative and Quantitative Characterization of Snake Gourd (Trichosanthes anguina L.) Mutant Lines

2019 ◽  
Vol 8 (08) ◽  
pp. 1797-1803
Author(s):  
Santanu Layek ◽  
M.K. Pandit ◽  
Sanket Kumar ◽  
Arindam Das ◽  
Ana mika ◽  
...  
Keyword(s):  
Quantitative Characterization ◽  
Qualitative And Quantitative ◽  
Mutant Lines

Handheld Portable Energy-Dispersive X-Ray Fluorescence Spectrometry (pXRF)

2016 ◽  
pp. 362-381 ◽  
Author(s):  
Elisabeth Holmqvist
Keyword(s):  
Production Systems ◽  
Matrix Effects ◽  
Chemical Characterization ◽  
High Sensitivity ◽  
Limited Range ◽  
Energy Dispersive ◽  
Analytical Sensitivity ◽  
X Ray ◽  
Non Destructive

Handheld portable energy-dispersive X-ray fluorescence (pXRF) spectrometry is used for non-destructive chemical characterization of archaeological ceramics. Portable XRF can provide adequate analytical sensitivity to discriminate geochemically distinct ceramic pastes, and to identify compositional clusters that correlate with data patterns acquired by NAA or other high sensitivity techniques. However, successful non-destructive analysis of unprepared inhomogeneous ceramic samples requires matrix-defined scientific protocols to control matrix effects which reduce the sensitivity and precision of the instrumentation. Quantification of the measured fluorescence intensities into absolute concentration values and detection of light elements is encumbered by the lack of matrix matched calibration and proper vacuum facilities. Nevertheless, semi-quantitative values for a limited range of high Z elements can be generated. Unstandardized results are difficult to validate by others, and decreased analytical resolution of non-destructive surface analysis may disadvantage site-specific sourcing, jeopardize correct group assignments, and lead to under-interpretation of ceramic craft and production systems.

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