The examination, evaluation and comparison of corrosion effect on different metal surface by various crops based biodiesel

2020 ◽  
pp. 095440622097058
Author(s):  
Sajan K Chourasia ◽  
Absar M Lakdawala ◽  
Rajesh N Patel
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Corrosion Rate ◽  
Immersion Test ◽  
Gas Chromatography Mass Spectrometry ◽  
Electron Microscopic ◽  
Scanning Electron Microscopic ◽  
Roughness Analysis ◽  
Scanning Electron ◽  
Static Immersion

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.

scholarly journals Chemical composition and insecticidal activity of Garcinia gardneriana (Planchon & Triana) Zappi (Clusiaceae) essential oil

2021 ◽  
Vol 20 (5) ◽  
pp. 503-514
Author(s):  
Carla Maria Mariano Fernandez ◽  
◽  
Fabiana Brusco Lorenzetti ◽  
Sirlene Adriana Kleinubing ◽  
Joao Paulo Pinguello de Andrade ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Chemical Analysis ◽  
Essential Oil ◽  
Immersion Test ◽  
Acaricidal Activity ◽  
Gas Chromatography Mass Spectrometry ◽  
Larvicidal Effect ◽  
Sesquiterpene Hydrocarbons

The present study aimed to analyze the chemical composition of the essential oil from Garcinia gardneriana (Planchon & Triana) Zappi leaves and fruits, and to determine its acaricidal activity on Rhipicephalus microplus by larval packet test and larvicidal action on Aedes aegypti by larval immersion test. The chemical analysis of the essential oil by gas chromatography-mass spectrometry identified sesquiterpene hydrocarbons and oxygenated sesquiterpenes in bacupari leaves and fruits, and α-cedrene, α-chamigrene, α-trans-bergamotene, and β-curcumene as major compounds. Essential oil from leaves of G. gardneriana presented acaricidal activity on R. microplus (LC50 = 4.8 mg/mL; LC99 = 10.8 mg/mL) and larvicidal effect on A. aegypti (LC50 = 5.4 mg/mL; LC99 = 11.6 mg/mL), whereas essential oil from the fruits of G. gardneriana showed LC50 = 4.6 mg/mL and LC99 = 8.9 mg/mL against R. microplus and LC50 = 6.4 mg/mL and LC99 = 13.9 mg/mL against A. aegypti. These results thus demonstrate the potential acaricidal and larvicidal activity of essential oil of G. gardneriana, offering new perspectives for the realization of bioassays from this essential oil.

Vergleichende Untersuchungen an Pb8Tl5O24-, α-PbO2- und Tl2O3-Elektroden / Comparative Investigations of Pb8Tl5O24, α-PbO2 and Tl2O3 Electrodes

1984 ◽  
Vol 39 (5) ◽  
pp. 594-599 ◽  
Author(s):  
Werner Tillmetz ◽  
Dietrich Wabner
Keyword(s):  
Sulfuric Acid ◽  
Corrosion Rate ◽  
Anode Material ◽  
Cyclic Voltammograms ◽  
Electron Microscopic ◽  
Redox Behaviour ◽  
Scanning Electron Microscopic ◽  
Anodic Deposition ◽  
Vergleichende Untersuchungen ◽  
Scanning Electron

The anodic deposition of Pb8Tl5O24 is compared with that one of Tl2O3 and α-PbO2. Scanning electron microscopic pictures of the oxide surfaces show obvious differences. This should be the reason for different oxygen overpotentials measured at these anodes. Comparative cyclic voltammograms show, that the redox behaviour of Pb8Tl5O24 in sulfuric acid is essentially determined by the lead ions. Because of the high corrosion rate Pb8Tl5O24 is not suitable as anode material for electrolysis in sulfuric acid

MDMA (3,4-methylenedioxymethamphetamine) nitrate – an atypical salt form or a new trend in the drug market?

2017 ◽  
Vol 296 ◽  
pp. 86-94
Author(s):  
Robert Bachliński ◽  
◽  
Małgorzata Galarda ◽  
Keyword(s):  
Electron Microscopy ◽  
Mass Spectrometry ◽  
Scanning Electron Microscopy ◽  
Gas Chromatography ◽  
Infrared Spectroscopy ◽  
Illicit Drug ◽  
Drug Market ◽  
Gas Chromatography Mass Spectrometry ◽  
Salt Form ◽  
Scanning Electron

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.

A Study of the Materials of Pontormo's “Portrait of Alessandro de' Medici”

2004 ◽  
Vol 852 ◽  
Author(s):  
Ken Sutherland ◽  
Beth A. Price ◽  
Irma Passeri ◽  
Mark Tucker
Keyword(s):  
Electron Microscopy ◽  
Mass Spectrometry ◽  
Scanning Electron Microscopy ◽  
Gas Chromatography ◽  
Gas Chromatography Mass Spectrometry ◽  
Infrared Microspectroscopy ◽  
Fourier Transform Infrared Microspectroscopy ◽  
Materials Used ◽  
Scanning Electron

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.

Scanning Electron Microscopic Study of the Cell Surface

1969 ◽  
Vol 27 ◽  
pp. 36-37 ◽  
Author(s):  
Toichiro Kuwabara
Keyword(s):  
Tissue Fluid ◽  
Biological Application ◽  
Biological Structure ◽  
Electron Microscopic ◽  
Surface Appearance ◽  
Minute Amount ◽  
Scanning Electron Microscopic Study ◽  
Scanning Electron Microscopic ◽  
True Structure ◽  
Scanning Electron

Although scanning electron microscopy has a great potential in biological application, there are certain limitations in visualization of the biological structure. Satisfactory techniques to demonstrate natural surfaces of the tissue and the cell have been reported by several investigators. However, it is commonly found that the surface cell membrane is covered with a minute amount of mucin, secretory substance or tissue fluid as physiological, pathological or artefactual condition. These substances give a false surface appearance, especially when the tissue is fixed with strong fixatives. It seems important to remove these coating substances from the surface of the cell for demonstration of the true structure.

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