Conducting Remarks 51 References

Ocular Effects. A case-control study of office workers was conducted by Baj et al. (1994) to evaluate the risks of chronic exposures to inhaled formaldehyde, phenol and isomers of organic chlorohydrocarbons from Ksylamit which is a widely used liquid wood preservative reported to consist of a mixture of chlorinated benzenes, pentachlorophenol, alpha-chloronaphthalene, chloroparafifin, and kerosene . Twenty-two workers (18 women and 4 men) exposed for at least 6 months were the cases, and 29 non-exposed, non-smoking volunteers matched for age, sex, and place of residence were the controls. The authors indicate that all of the exposed workers developed chronic complaints, among them burning eyes, but that no remarkable increase in morbidity was found during the 6 months of exposure to Ksylamit , nor during the 3-year follow-up study (details of which were not provided). The authors attribute these symptoms to the irritant effect of the inhaled Ksylamit probably (based on the references provided) due to the formaldehyde vapor they assert emanates from the woodpreserving liquid. 

Re = wsdpPg/T g is the Reynolds number in which dp refers to particle diameter, us superficial velocity, pg gas density and r g dynamic viscosity. The exponential term accounts for the enhancement effect due to the catalytic bed. in the Nusselt number the characteristic length is the tube diameter, such that Nu = awdt/7tg. For hydrogen-rich mixtures the thermal conductivity is remarkably high. 

Two remarks should be formulated here. First, in most operational models dealing with chemical transport in soil, the REV pertains to the macroscopic scale. The macroscopic scale, often referred to as the local scale, corresponds to the scale where in the plot of the expected value of an essential property determining flow and transport (e.g. hydraulic conductivity) versus scale, a first nearly constant level along some appreciable length scale is reached. This can be illustrated with a simple theoretical experiment where the porosity in a porous medium is determined by sampling the porous medium with sampling windows of different sizes (Fig. 3). 

Compound Conductivity / S.cm" a/eV Temp. range/°C Reference, method, single (S) or polycrystal (P), other remark... 

---