Size, Shape, and Elemental Composition of Airborne Wear Particles from Disc Brake Materials

Cell culture systems have become increasingly popular as a means of screening toxic agents and studying toxic mechanisms of drugs and other chemicals at the cellular and subcellular levels. These in vitro tests can be conducted rapidly in a broad range of relevant mammalian culture systems; a variety of biological and biochemical cytotoxicity endpoints can be examined. The following study utilized human keratinocytes to evaluate the relative cytotoxicities of nitrofurazone (NF) and silver sulfadiazine (SS), the active ingredients of FURACIN(R) Topical Cream and SILVADENE(R) Cream, respectively. These compounds are anti-infectives used in the treatment of burn patients. Cell ultrastructure and elemental composition were utilized as cytotoxicity endpoints.Normal Human Epidermal Keratinocytes (HK) were prepared from the EpiPackTM culture system (Clonetics Corporation, Boulder, CO). For scanning electron microscopy (SEM) and transmission electron microscopy (TEM), cells were seeded on sterile 35 mm Falcon plastic dishes; for elemental microanalysis, cells were plated on polished pyrolytic carbon discs (E. Fullam, Latham, NY) placed in the culture dishes.

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Electron probe x-ray microanalysis and electron microscopy of amino acid absorption and transport by the small intestine: inhibition by chemical poisons and correlation to the elemental composition of the epithelial cells

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100142311 ◽

1986 ◽

Vol 44 ◽

pp. 134-135

Author(s):

A. J. Tousimis

Keyword(s):

Small Intestine ◽

Amino Acid ◽

Epithelial Cells ◽

Elemental Composition ◽

Isotope Labeling ◽

Structural Components ◽

X Ray ◽

Human Small Intestine ◽

Transport Studies

The elemental composition of amino acids is similar to that of the major structural components of the epithelial cells of the small intestine and other tissues. Therefore, their subcellular localization and concentration measurements are not possible by x-ray microanalysis. Radioactive isotope labeling: I131-tyrosine, Se75-methionine and S35-methionine have been successfully employed in numerous absorption and transport studies. The latter two have been utilized both in vitro and vivo, with similar results in the hamster and human small intestine. Non-radioactive Selenomethionine, since its absorption/transport behavior is assumed to be the same as that of Se75- methionine and S75-methionine could serve as a compound tracer for this amino acid.

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34. Size-Selective Elemental Composition Of Welding Fumes In Area Samples

10.3320/1.2758383 ◽

2004 ◽

Author(s):

J. Schnackenbeck ◽

S. Erdal ◽

T. Schoonover ◽

L. Conroy

Keyword(s):

Elemental Composition ◽

Welding Fumes

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Elemental composition of compact human bone correlated with the osteocyte network

Bone Abstracts ◽

10.1530/boneabs.5.p37 ◽

2016 ◽

Author(s):

Andreas Roschger ◽

Paul Roschger ◽

Felix Repp ◽

Wolfgang Wagermaier ◽

Richard Weinkamer ◽

...

Keyword(s):

Elemental Composition ◽

Human Bone

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COMPUTATIONAL FLUID DYNAMICS MODELING AND COMPUTATION OF CONVECTIVE HEAT COEFFICIENT TRANSFER FOR AUTOMOTIVE DISC BRAKE ROTORS

Computational Thermal Sciences An International Journal ◽

10.1615/computthermalscien.2017019834 ◽

2018 ◽

Vol 10 (1) ◽

pp. 1-21 ◽

Cited By ~ 2

Author(s):

Ali Belhocine ◽

Wan Zaidi Wan Omar

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Convective Heat ◽

Disc Brake ◽

Dynamics Modeling ◽

Computational Fluid Dynamics Modeling ◽

Brake Rotors

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ANALYSIS OF AUTOMATIC TRANSMISSION USING FOURIER TRANSFORM INFRARED (FTIR) SPECTROCOPY

e-Academia Journal ◽

10.24191/e-aj.v7isi-temic18.5378 ◽

2019 ◽

Vol 7 (SI-TeMIC18) ◽

Author(s):

Norhanifah Abdul Rahman ◽

Matzaini Katon Katon ◽

Nurina Alya Zulkifli Zulkifli

Keyword(s):

Fourier Transform ◽

Automatic Transmission ◽

Fourier Transform Infrared ◽

Oil Analysis ◽

Wear Particles ◽

Reliable Technique ◽

Fluid Analysis ◽

Analysis Technique ◽

Machine Elements ◽

Transmission Fluid

Automatic Transmission (AT) system is efficient in the aspects of vehicle safety, comfort, reliability and driving performance. The objectives of this paper are to collect the oil samples from AT systems of engine bus according to manufacturer's recommendations and analyse collected oil samples using oil analysis technique. The sample transmission fluid which was taken from the AT gearbox has been experimentally analyzed. The oil samples were taken with an interval of 5,000km, 30,000km, 50,000km, 80,000km, 180,000km and 300,000km for AT bus operation. These samples then have been analyzed by comparing between new and used transmission fluid using Fourier Transform Infrared (FTIR) spectroscopy. Oil analysis by FTIR is a form of Predictive Maintenance (PdM) to avoid major failure in machine elements. Most machine elements are not easily accessible in the transmission system. Having a reliable technique would avoid the needs to open the components unnecessarily, hence, help to prevent catastrophic failure which are very costly, and ease of regular monitoring. In order to identify the major failures of automatic gearbox, forecasts can be made regarding the lube transmission fluid analysis test. By using this test, the minor problems can be determined before they become major failures. At the end of this research, the wear particles profile for interval mileage of AT system was obtained. Keywords: Wear, Automatic Transmission (AT), Transmission fluid, Fourier Transform Infrared (FTIR), Oil analysis.

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