scholarly journals Comprehensive Multi-Analytical Investigations on the Vietnamese lacquered Wall-Panel “The Return of the Hunters” by Jean Dunand

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Valentina Pintus ◽  
Anthony J. Baragona ◽  
Karin Wieland ◽  
Michael Schilling ◽  
Silvia Miklin-Kniefacz ◽  
...  
Keyword(s):  
Linseed Oil ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Gas Chromatography Mass Spectrometry ◽  
Inorganic Pigments ◽  
Wall Panel ◽  
X Ray ◽  
Scientific Approach ◽  
Materials Used ◽  
Scanning Electron

AbstractThis work presents a comprehensive, multi-analytical scientific approach for determining the type of lacquer and artistic materials used by Jean Dunand on his work “The Return of the Hunters” (1935). For this purpose, thermally assisted hydrolysis and methylation – gas chromatography/mass spectrometry (THM-GC/MS), optical microscopy (OM) in visible (Vis) and ultraviolet light (UV), and scanning electron microscopy - energy-dispersive X-ray spectroscopy (SEM-EDX) were selected. Furthermore, a novel application of micro attenuated total reflection Fourier transform infrared (µATR-FTIR) spectroscopic mapping by univariate and multivariate analysis was applied for studying the complex lacquer paint stratigraphy. The results show that Vietnamese lacquer was used as a binder, mixed together with linseed oil and pine resins as additives in combination with inorganic pigments, and that shellac was included on the top of the paint; they document an important step in the story of the transfer of Vietnamese lacquer painting techniques to Europe.

scholarly journals Analysis of paint traces to determine the ship responsible for a collision

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
H. Lee ◽  
D. Lee ◽  
J. M. Seo
Keyword(s):  
Electron Microscopy ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
X Ray ◽  
Pyrolysis Gas Chromatography ◽  
Ship Collision ◽  
Derivative Thermogravimetry ◽  
Scanning Electron

AbstractAlthough there have been many instances of ship collision at sea in recent times, not much research has been conducted on the topic. In this study, paint from an actual site of ship collision was collected and analyzed as evidence. The amount of evidence collected from the ships involved in the collision is either small or has inconsistent morphology. In addition, the contaminants and samples are often mixed in this evidence, making its analysis difficult. Paint traces of the damaged ship and the ship suspected to be responsible for the collision were compared through scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM–EDS), attenuated total reflection–Fourier transform infrared spectroscopy (ATR–FTIR), thermogravimetry (TG) and derivative thermogravimetry (DTG), and pyrolysis–gas chromatography/mass spectrometry (Py–GC/MS) analyses. The ship responsible for the collision could be identified by characterization and by performing a comparative analysis of the extracted paint. Among the methods used in this study, Py–GC/MS can sensitively analyze even similar paints, and identified styrene and phthalic anhydride as the most prominent components of the paint used as evidence. The results obtained can be used to investigate the evidence collected from collision sites and to determine the ship responsible for the collision.

scholarly journals Pengamatan Surface Plasmon Resonance pada ZnO Nanorods dengan Menggunakan Konfigurasi Prisma/Au/ZnO

2020 ◽  
Vol 23 (1) ◽  
pp. 27
Author(s):  
Rina Dewi Mayasari ◽  
Ajeng Novita Sari ◽  
Aditya Eka Mulyono ◽  
Agus Setyo Budi ◽  
Ratno Nuryadi
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Zno Nanorods ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
X Ray Diffraction ◽  
X Ray ◽  
20 Nm ◽  
Scanning Electron

Pengamatan fenomena surface plasmon resonance (SPR) telah berhasil dilakukan pada ZnO nanorods yang ditumbuhkan di atas lapisan tipis emas. Sistem SPR menggunakan konfigurasi Kretschmann termodifikasi dimana permukaan prisma dideposisi dengan lapisan tipis emas dan ZnO nanorods (prisma/Au/ZnO). Penumbuhan ZnO nanorods menggunakan metode hidrotermal dengan dua tahapan, yaitu pelapisan ZnO seed dan penumbuhan rods. Waktu penumbuhan divariasikan selama 5 menit, 2 jam, dan 4 jam, pada suhu 95 °C yang diikuti dengan annealing pada suhu 500 °C selama 1 jam. Struktur ZnO dikarakterisasi dengan X-ray diffraction (XRD), field emission scanning electron microscope - energy dispersive X-ray spectroscopy (FESEM-EDS), serta diamati fenomena SPR melalui grafik attenuated total reflection (ATR). Hasil karakterisasi menunjukkan bahwa ZnO nanorods (2 jam dan 4 jam) memiliki struktur kristal heksagonal dengan distribusi ukuran diameter pada rentang 20 nm – 60 nm. Fenomena SPR hanya teramati pada nanopartikel ZnO (5 menit) pada sudut SPR (θSPR) 58,2°. Fenomena SPR tidak terlihat pada ZnO nanorods (2 jam dan 4 jam) dikarenakan panjang rods melebihi 100 nm.

Direct Synthesis of Pure Radiative Vo2 (M) Plate Like Structures Via Hydrothermolysis at Low Temperature

2012 ◽  
Vol 1406 ◽  
Author(s):  
A. Simo ◽  
L.C. Edomwonyi-Otu ◽  
R. Madjoe ◽  
M. Maaza
Keyword(s):  
Direct Synthesis ◽  
High Surface ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
X Ray Diffraction ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Vibrational Bands ◽  
High Surface Energy ◽  
Scanning Electron

ABSTRACTFacile and direct synthesis of radiative VO2 (M) plate-like is reported. The snowflake material presents superstructures plate-like aggregate with an anisotropic orientation in shape governed by V2O5 and NaOH concentration giving high surface energy liable for chemical reactions with the medium. Pure crystalline VO2 (M) has been obtained with a complete hydrothermolysis of the precursor. The morphological, structural, elemental composition, crystallinity and vibrational bands of the powders were characterized by Powder X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Selected Area Electron Diffraction (SAED) and Fourier Transform-Attenuated Total Reflection (FTIR-ATR) infrared spectroscopy.

scholarly journals A Multi-Analytical Approach for the Characterization of Seventeenth Century Decorative Wall Paintings in Two Norwegian Stave Churches: A Case Study at Eidsborg and Heddal, Norway

2021 ◽  
Vol 11 (8) ◽  
pp. 3477
Author(s):  
Ashley Amanda Freeman ◽  
Lavinia de Ferri ◽  
Joy Mazurek ◽  
Fabrizio Andriulo ◽  
Chiara Bertolin
Keyword(s):  
Analytical Approach ◽  
Linseed Oil ◽  
Environmental Scanning Electron Microscopy ◽  
Gas Chromatography Mass Spectrometry ◽  
Enzyme Linked Immunosorbent Assay ◽  
Environmental Scanning ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pine Tree ◽  
Materials Used

The presented research examines 17th century distemper paint from the polychrome wooden interiors of two Norwegian stave churches: Eidsborg and Heddal. For the first time, the inorganic and organic components of specimens from Eidsborg and Heddal were identified using X-ray Diffraction (XRD), Environmental Scanning Electron Microscopy (ESEM)—Energy Dispersive X-ray Spectroscopy (EDS), Fourier-Transform Infrared (FT-IR) spectroscopy, Enzyme-Linked Immunosorbent Assay (ELISA), and Gas Chromatography-Mass Spectrometry (GC-MS) after derivatization. This multi-analytical approach allowed for the identification of red ochre as the main red pigment within the topcoat (with the possible addition of minium), confirmed that a chalk basecoat was used, and finally permitted the recognition of alteration phases. Markers of proteinaceous material attributed to the use of animal-based glues were detected throughout the stratigraphic layers of both churches, with the addition of linseed oil in some locations. Furthermore, the wood substrate showed markers characteristic of pine tree, with contamination of wood fractions being detected in some of the paint samples from Heddal and Eidsborg. This research has contributed to a better understanding of the current preservation state of Heddal and Eidsborg, and ultimately assisted in developing a deeper comprehension and awareness of materials used in Norwegian stave churches.

Structure of Thermally Grown SiO2 on Crystalline 6H‐SíC

1996 ◽  
Vol 446 ◽  
Author(s):  
H. Tsuchida ◽  
I. Kamata ◽  
K. Izumi
Keyword(s):  
Local Structure ◽  
Structural Transition ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Interface Roughness ◽  
X Ray ◽  
Thermal Oxide ◽  
Stretching Vibration ◽  
Density Surface ◽  
Thermally Grown

AbstractThe structure of a thermally grown SiO2 film on a crystalline 6H‐SiC substrate was investigated using X‐ray reflectivity and fourier‐transformed infrared attenuated total reflection (FTIR‐ATR). The density, surface roughness and interface roughness of thermal oxide on 6H‐SiC were obtained by X‐ray reflectivity. The TO mode and the LO mode of Si‐O‐Si stretching vibration from the thermal oxide film on 6H‐SiC were obtained from polarized ATR spectra. The local structure of SiO2 film near the SiO2 /SiC interface was discussed from the measurements, and the thermally grown SiO2 film on a 6H‐SiC substrate was found to have a structural transition layer with thickness below 10 nm near the SiO2/SiC interface.

Physicochemical Characteristics of an Ultra-Thin Hydrophobic Trichlorosilanes Using SiO2 as Adhesion

2019 ◽  
Vol 796 ◽  
pp. 80-87
Author(s):  
Akinsanya Damilare Baruwa ◽  
Esther Titilayo Akinlabi ◽  
Oluseyi Philip Oladijo ◽  
Stephen Akinwale Akinlabi ◽  
Jeff Chinn
Keyword(s):  
Room Temperature ◽  
Electrochemical Impedance ◽  
Physicochemical Characteristics ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Natural Seawater ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hydrophobic Silane ◽  
Better Than

The aim of the research is to subject the three different silanes to chemical and electrochemical investigations in other to determine the most efficient organic compound. Three types of hydrophobic silanes [Tris (Trimethylsiloxy) silyethyl] dimethylchlorosilane (Alkyl); Tridecafloro-1,1,2,2-tetrahydrooctyltrichlorosilane (FOTS) and Henicosyl-1,1,2,2-tetrahydrododecyltricholrosilane (FDDTS) are presented and investigated. The three silanes are of different composition but are deposited at the same parameters and conditions. The chemical investigation was studied through (attenuated total reflection Fourier-transform infrared (ATR-FTIR) and x-ray diffraction (XRD), while the electrochemical study was conducted through EIS using natural seawater electrolyte at room temperature. From the investigation techniques, only electrochemical impedance results show that FDDTS performed better than both Alkyl and FOTS. The chemical analysis showed the presence of hydrophobic silane on all the coated samples, and no distinction can be drawn from associated peaks.

Fabrication and Properties of Panicum repens Reinforced Cement

2018 ◽  
Vol 879 ◽  
pp. 161-165
Author(s):  
Varinthorn Boonyaroj ◽  
Sirichai Saramanus
Keyword(s):  
Compressive Strength ◽  
Raw Materials ◽  
Chemical Characteristics ◽  
Sodium Hydroxide Concentration ◽  
X Ray ◽  
Optimal Ratio ◽  
Panicum Repens ◽  
Reinforced Cement ◽  
Materials Used ◽  
Scanning Electron

This research aims to fabrication and evaluation the properties of cement reinforcement made from Panicumrepens. The research is divided into two parts are as follows; to determined the optimal ratio selection, and to compare the properties of Panicumrepens reinforced cement, and without grasses by using the optimal ratio. The raw materials used in this research were cut in length of 2.0-2.5 cm. In this research was determined the properties of Panicumrepens reinforced cement in terms of bulk density, water absorption, and compressive strength. The influence of fibers soaked with 5% of sodium hydroxide concentration was also conducted in this research. The surface structure and chemical characteristics of fibers used to produce reinforced cement were observed by using scanning electron microscope (SEM), and energy dispersive x-ray spectrometer (EDS), respectively. Moreover, relationships of information collected from this research were concerned. Furthermore, the addition of Panicumrepens fibers could improve the flexural strength of composite materials.

Sign in / Sign up

Export Citation Format

Share Document