On the spectroscopic examination of printed documents by using a field emission scanning electron microscope with energy-dispersive X-ray spectroscopy (FE-SEM-EDS) and chemometric methods: application in forensic science

2019 ◽  
Vol 411 (16) ◽  
pp. 3477-3495 ◽  
Author(s):  
Neha Verma ◽  
Vishal Sharma ◽  
Raj Kumar ◽  
R. Sharma ◽  
M. C. Joshi ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Forensic Science ◽  
Field Emission ◽  
Energy Dispersive ◽  
Chemometric Methods ◽  
X Ray ◽  
Spectroscopic Examination ◽  
Scanning Electron

scholarly journals STUDY OF MULTIELEMENTAL CONCENTRATIONS AND NANO-MICRO STRUCTURAL MORPHOLOGY IN MYRTACEAE FAMILY MEDICINAL PLANTS BY FIELD EMISSION SCANNING ELECTRON MICROSCOPE-ENERGY DISPERSIVE X-RAY SPECTROSCOPY METHOD

2019 ◽  
pp. 432-435
Author(s):  
TEERTHE SS ◽  
KERUR BR
Keyword(s):  
Trace Elements ◽  
Electron Microscope ◽  
Medicinal Plants ◽  
Scanning Electron Microscope ◽  
Field Emission ◽  
Energy Dispersive ◽  
World Health ◽  
Structural Morphology ◽  
X Ray ◽  
Scanning Electron

Objective: The essential multielemental analysis was carried out in nano- and microscale surface morphology of two useful selected species of Myrtaceae family medicinal plants such as Eucalyptus and Guava using “field emission scanning electron microscope”–“energy dispersive X-ray spectroscopy” (FESEM-EDS). To understand the elemental analysis of medicinal plant used in Bidar, Gulbarga/Kalaburagi and Yadgir districts of the Northeast Karnataka region. Methods: In the present investigation, Myrtaceae family’s medicinal plants selected. The analysis of the samples were thorough nano-micro photograph obtained by using FESEM and specific weight percent of elemental concentration analyzed by EDX/EDS. Results: The elemental concentrations such as C, O, magnesium, Al, Si, S, Cl, K, Ca, Mn, Fe, Cu, and Zn were estimated in all the collected medicinal plants and found to be within the World Health Organization (WHO’s) recommended values. FESEM morphology indicates that fine plane irregularly shaped particles, with size an average diameter 200 nm–1 μm, are found in both plants. Conclusion: The Indian Traditional Medicinal Plants have been used as a potential source for general and therapeutic medicinal purposes, including as a home remedy, Ayurvedic, and herbal drugs for the treatment of different types of human diseases. The WHO established maximum permissible limits for the consumption of major, minor, and trace elements to ensure the safe uses of medicinal plants as a drug material so as to cure the diseases. The present investigation suggests that the collected medicinal plants have good alignments of secondary metabolites, functional groups, and intake of trace elements, which are useful for treatment and preparation of new Ayurvedic, herbal, and pharmaceutical drug, pellets of very small size for alignment of different diseases.

scholarly journals Tungsten/Platinum Hybrid Nanowire Growth via Field Emission Using Nanorobotic Manipulation

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Zhan Yang ◽  
Masahiro Nakajima ◽  
Yasuhito Ode ◽  
Toshio Fukuda
Keyword(s):  
Electron Microscope ◽  
Carbon Nanotube ◽  
Scanning Electron Microscope ◽  
Field Emission ◽  
Multiwalled Carbon Nanotube ◽  
Energy Dispersive ◽  
Nanowire Growth ◽  
Multiwalled Carbon ◽  
X Ray ◽  
Scanning Electron

This paper reports tungsten-platinum hybrid nanowire growth via field emission, based on nanorobotic manipulation within a field emission scanning electron microscope (FESEM). A multiwalled carbon nanotube (MWCNT) was used as the emitter, and a tungsten probe was used as the anode at the counterposition, by way of nanomanipulation. By independently employing trimethylcyclopentadienyl platinum (CpPtMe3) and tungsten hexacarbonyl (W(CO)6) as precursors, the platinum nanowire grew on the tip of the MWCNT emitter. Tungsten nanowires then grew on the tip of the platinum nanowire. The hybrid nanowire length wascontrolled by nanomanipulation. Their purity was evaluated using energy-dispersive X-ray spectroscopy (EDS). Thus, it is possible to fabricate various metallic hybrid nanowires by changing the precursor materials. Hybrid nanowires have various applications in nanoelectronics, nanosensor devices, and nanomechanical systems.

PHAX-SCAN: Functional integration of a Scanning Electron Microscope and an energy-dispersive x-ray analyser

1989 ◽  
Vol 47 ◽  
pp. 56-57
Author(s):  
Marc H. Peeters ◽  
Max T. Otten
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
Functional Integration ◽  
Energy Dispersive ◽  
X Rays ◽  
X Ray ◽  
High Speed Analysis ◽  
Scanning Electron

Over the past decades, the combination of energy-dispersive analysis of X-rays and scanning electron microscopy has proved to be a powerful tool for fast and reliable elemental characterization of a large variety of specimens. The technique has evolved rapidly from a purely qualitative characterization method to a reliable quantitative way of analysis. In the last 5 years, an increasing need for automation is observed, whereby energy-dispersive analysers control the beam and stage movement of the scanning electron microscope in order to collect digital X-ray images and perform unattended point analysis over multiple locations.The Philips High-speed Analysis of X-rays system (PHAX-Scan) makes use of the high performance dual-processor structure of the EDAX PV9900 analyser and the databus structure of the Philips series 500 scanning electron microscope to provide a highly automated, user-friendly and extremely fast microanalysis system. The software that runs on the hardware described above was specifically designed to provide the ultimate attainable speed on the system.

scholarly journals Characterizing Severely Plastically Deformed Materials Using Transmission Kikuchi Diffraction and Energy Dispersive X-ray Spectroscopy in the Scanning Electron Microscope

2013 ◽  
Vol 19 (S2) ◽  
pp. 692-693
Author(s):  
P. Trimby
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Energy Dispersive ◽  
X Ray ◽  
Scanning Electron

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

Karakteristik Hasil Proses Nitridisasi Besi Tuang Nodular Temperatur 5500C pada Waktu Penahanan 2 Jam, 4 Jam, 6 Jam

2021 ◽  
Vol 12 (1) ◽  
pp. 13-18
Author(s):  
Wayan Sujana
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Energy Dispersive ◽  
Fluidised Bed ◽  
X Ray ◽  
Scanning Electron

Nitridisasi merupakan suatu proses perlakuan panas termokimia yang dimana nitrogen dan amonia didifusikan kepermukaan material (ferro and non-ferro) pada temperatur 500-6000C sehingga membentuk pengerasan kulit akibat terbentuknya lapisan nitrida paduan pada permukaan. Namun pengerasan permukaan ditentukan oleh paduan dari material yang dilakukan proses nitridisasi.Tujuan Nitridisasi adalah untuk memperbaiki ketahanan aus, meningkatkan ketahanan lelah, dan memperbaiki ketahanan tehadap korosi. Proses nitidisasi ini juga dapat mengganti jenis perlakuan panas lain yang menekankan performance yang baik. Pada penelitian ini akan memanfaatkan besi cor nodular yanga akan diproses nitridisasi menggunakan fluidised bed furnace. Pada penelitian ini menggunakan pengujian distribusi kekerasan (metode vickers) untuk mengamati sejauh mana nitrogen berdifusi pada permukaan spesimen, dan pengamatan struktur mikro dengan scanning electron microscope, energy dispersive X-Ray spectroscopy (SEM-EDS).Penelitian ini akan memberikan informasi fenonema proses nitridisasi pada besi cor nodular sehingga mendapatkan suatu analisis yang sesuai dengan metode sehingga menghasilkan kualitas kekerasan permukaan yang baik.

scholarly journals Biosorption of lead ions by exopolysaccharide producing Azotobacter sp.

2021 ◽  
Vol 42 (1) ◽  
pp. 40-50
Author(s):  
P. Dhevagi ◽  
◽  
S. Priyatharshini ◽  
A. Ramya ◽  
M. Sudhakaran ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Response Surface ◽  
Functional Groups ◽  
Contact Time ◽  
Sewage Water ◽  
Energy Dispersive ◽  
X Ray ◽  
Scanning Electron

Aim: Removal of lead from wastewater using Azotobacter species and optimisation of various parameters to maximise the adsorption of lead by response surface methodology as a tool. Methodology: The bacterial isolate UBI-7 recovered from sewage water irrigated soil was examined for its biosorption potential towards lead. The lead removal efficiency of Azotobacter salinestris was studied with respect to metal concentration (50-250 mg l-1), contact time (24-120 hrs), and pH (4-8).Using response surface methodology, these factors were optimized and R2 value obtained was 0.9710 for lead ions, which indicates the validity of the model. Observation with Fourier Transform Infrared (FTIR), Scanning Electron Microscope imaging (SEM) and Energy Dispersive X-ray Spectroscopic analysis (EDX) were carried out to confirm lead biosorption by Azotobacter salinestris. Results: The lead tolerant bacterium isolated from sewage water irrigated soil (UBI-7) was recognized as Azotobacter salinestris by 16S rRNA based gene sequence analysis. The highest removal percentage of Pb (61.54) was 50 mg l-1 in 72 hrs equilibration period. Interaction effect between different levels of Pb and different contact time of the solution were found to be significant. Lead biosorption by the organism was confirmed by the changes in stretching intensities of functional groups as well as appearance of strong OH stretching at 3291.69 cm-1. Images obtained from Scanning Electron Microscope and Energy Dispersive X-ray Spectroscopic studies of the bacteria (UBI-7) before and after biosorption clearly indicated lead adsorption. Interpretation: Current study proves that the functional groups of Azotobacter salinestris are involved in lead biosorption from aqueous solution which was confirmed through FTIR.EDX analysis also elucidated the lead absorption by the bacterial cells. Hence, this could be effectively utilized for decontamination of lead from the polluted environment. Key words: Azotobacter salinestris, Biosorption, Lead, Response surface methodology

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