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A study of 2800 workers employed in three factories of the two major manufacturers of enzymatic products in the United Kingdom covering 11 years of operation from 1969 to 1980 showed that 2344 workers had sufficient lung function data to meet the operational criteria and these were analysed in three separate groups by factory locations. Spirometry and prick(More)
Although long considered to be of marginal importance to global climate change, tropospheric aerosol contributes substantially to radiative forcing, and anthropogenic sul-fate aerosol in particular has imposed a major perturbation to this forcing. Both the direct scattering of short-wavelength solar radiation and the modification of the shortwave reflective(More)
Methods are described for investigating the dimensional stability of passive Fabry-Perot etalons with spacers made of low expansion materials. The measurements are made in terms of the Krypton 86 primary length standard which is reproducible to 1 part in 10(8). The precision of the measurements defined as L/DeltaL when DeltaL is the smallest detectable(More)
A simple single-frequency He-Ne laser is described in which the cavity ength is designed to be of high stability. The components are precision-made by standard workshop methods so that the laser requires no adjustments after assembly and the reflectors and capillary plasma tube are readily replaceable. Over a period of hours, frequency stability was within(More)
A method of keeping the optical plates of a scanning Fabry-Perot interferometer parallel when setting on fringe maxima is described. The method needs no additional instrumentation other than the duplication of some of the electronic detection equipment needed for normal use of the instrument. Small oscillatory rotational movements about two axes at right(More)
In this work, the objective was to synthesize and evaluate the properties of a compatibilizer based on poly(ε-caprolactone) aimed at tuning the surface properties of cellulose fibers used in fiber-reinforced biocomposites. The compatibilizer is an amphiphilic block copolymer consisting of two different blocks which have different functions. One block is(More)
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