International round robin tests on the measurement of carbon in diesel exhaust particulates.

Object: Diesel soot has been recognized as probably carcinogenic to humans. Elemental carbon (also called black carbon) in soot is considered at the moment as the most significant surrogate to be measured for assessing the exposure to this pollutant. Its analysis is done by combustion in an oven and determination of the CO2 formed, after elimination of the organic fraction of the soot by heating and/or by solvent extraction.

[Radiologic diagnosis of biliary tract diseases].

The importance of the basis programme necessary for X-ray diagnosis of the biliary diseases is emphasized. For the clarification of difficult questions new invasive and non-invasive methods are at our disposal. After delimitation of the present value of the various examination techniques recommendations for their use are given.

[Possibilities and limitations of gastrointestinal radiography].

The picture intensifier television radioscopy, picture intensifier initial level photography, double contrast method and pharmacoradiography together with endoscopy further the optimation of the diagnostics of the diseases of oesophagus, stomach and intestine. The value of the X-ray diagnostics for the recognition of the biliary diseases and of the incleared jaundice is high. In diseases of liver and pancreas the X-ray diagnostics may further the finding of decision.