272. Evidence of Dermal Exposure Health Hazards Associated with Isocyanate-Containing Compounds

Some toxicological health hazards associated with subchronic dermal exposure to paraphenylene-diamine (PPD): An experimental study

Egyptian Journal of Forensic Sciences ◽

10.1016/j.ejfs.2012.06.003 ◽

2012 ◽

Vol 2 (3) ◽

pp. 105-111 ◽

Cited By ~ 1

Author(s):

Manal A. Abd-ElZaher ◽

Irene Atef Fawzy ◽

Hala Mohamed Ahmed ◽

Ahlam M. Abd-Allah ◽

Mariana Fathy Gayyed

Keyword(s):

Experimental Study ◽

Dermal Exposure ◽

Health Hazards

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A non-cyanide method of electropolishing silver

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100107873 ◽

1978 ◽

Vol 36 (1) ◽

pp. 146-147

Author(s):

R. L. Lyles ◽

S. J. Rothman ◽

W. Jäger

Keyword(s):

Electron Microscopy ◽

Sulphuric Acid ◽

Methyl Alcohol ◽

Health Hazards ◽

Silver Alloy ◽

High Quality ◽

Silver Alloys ◽

Free Sample ◽

Specimen Quality ◽

Standard Techniques

Standard techniques of electropolishing silver and silver alloys for electron microscopy in most instances have relied on various CN recipes. These methods have been characteristically unsatisfactory due to difficulties in obtaining large electron transparent areas, reproducible results, adequate solution lifetimes, and contamination free sample surfaces. In addition, there are the inherent health hazards associated with the use of CN solutions. Various attempts to develop noncyanic methods of electropolishing specimens for electron microscopy have not been successful in that the specimen quality problems encountered with the CN solutions have also existed in the previously proposed non-cyanic methods.The technique we describe allows us to jet polish high quality silver and silver alloy microscope specimens with consistant reproducibility and without the use of CN salts.The solution is similar to that suggested by Myschoyaev et al. It consists, in order of mixing, 115ml glacial actic acid (CH3CO2H, specific wt 1.04 g/ml), 43ml sulphuric acid (H2SO4, specific wt. g/ml), 350 ml anhydrous methyl alcohol, and 77 g thiourea (NH2CSNH2).

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