scholarly journals Identification of Acetoin Producing Rhizobacteria as Rice Plant Growth Control (Oryza sativa) from The Rhizosphere of Elephant Grass Plant (Pennisetum purpureum) using Gas Chromatography Mass Spectrometry (GC-MS) and Scanning Electron Microscope (SEM)

2020 ◽  
Vol 1569 ◽  
pp. 042099
Author(s):  
Adrianus
Author(s):  
Sajan K Chourasia ◽  
Absar M Lakdawala ◽  
Rajesh N Patel

Biodiesel is relatively higher corrosive compared to Diesel; consequently, the concern of viability is now a foremost issue. The biodiesel is self-oxidative in the environment; thus, its characteristics might be changed as fuel. The current work investigates the behavior of numerous biodiesel corresponding to corrosion when exposed to the surface of metal coupons. A gas chromatography mass spectrometry (GC-MS) was performed on eight biodiesel and a hypothesis was proposed to corroborate the hypothesis; static immersion tests, scanning electron microscopic (SEM) and surface roughness analysis were conducted. The immersion test was conducted for 150 days at ambient temperature conditions; later on, the corrosion rate of metals was examined. Results indicate that the Bronze has a maximum corrosion rate of 0.0674 mpy with Karanja biodiesel, followed by palm biodiesel. The Karanja biodiesel has the highest susceptibility to corrosion with all metals, while the Diesel is found to be the lowest with intermediate values for Rapeseed and Castor.


2017 ◽  
Vol 296 ◽  
pp. 86-94
Author(s):  
Robert Bachliński ◽  
◽  
Małgorzata Galarda ◽  

The article presents a case involving an appearance of an atypical 3,4-methylenedioxymethamphetamine (MDMA) in the form of nitrate on the illicit drug market. This compound can be identified only by using such analytical methods as capillary electrophoresis (CE) or scanning electron microscopy (SEM), which are not routinely applied to forensic analyses of this type of substances. Therefore, particular caution should be exercised whenever a gas chromatography-mass spectrometry (GC-MS) method unambiguously identifies a substance, yet infrared spectroscopy fails to confirm this result.


2004 ◽  
Vol 852 ◽  
Author(s):  
Ken Sutherland ◽  
Beth A. Price ◽  
Irma Passeri ◽  
Mark Tucker

ABSTRACTIn studies of the materials of old master paintings, the characterization of thin and degraded layers often presents unusual challenges for routinely used methods of analysis. This paper discusses analyses performed as part of a study of the materials and techniques of Pontormo's “Portrait of Alessandro de’ Medici” (1534–5) carried out during a recent cleaning and restoration of the painting. Pontormo built up the portrait using a complex sequence of preparation, drawing and paint layers, the analysis of which was complicated further in some areas by the presence of degraded materials on the paint surface. The materials used for the various stages of preparation and painting were characterized by gas chromatography/mass spectrometry (GCMS), Fourier transform infrared microspectroscopy (FTIR) and scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS). The focus of this paper will be the particular approaches taken to the characterization of the preparation layers and degraded surface materials.


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