منابع مشابه
Prevalence of IgE antibodies to grain and grain dust in grain elevator workers.
IgE-mediated allergic reactions have been postulated to contribute to respiratory reactions seen in workers exposed to grain dusts. In an attempt better to define the prevalence of IgE antibodies in workers exposed to grain dusts, we performed the radioallergosorbent test (RAST) on worker sera using both commercial allergens prepared from grain and worksite allergens prepared from grain dust sa...
متن کاملGrain drain
After the price hike and panic two years ago when grain prices reached record levels, recent harvests have generally been good and prices have stabilised. But a new report by the UN's Food and Agriculture Organisation (FAO) and the Organisation for Economic Cooperation and Development (OECD) suggests that many challenges lie ahead. Food prices are likely to rise by as much as 40 per cent over t...
متن کاملQuantitative Theory of Grain Alignment: Probing Grain Environment and Grain Composition
While the problem of grain alignment was posed more than 60 years ago the quantitative model of grain alignment that can account for the observed polarization arising from aligned grains has been formulated only recently. The quantitative predictions of the radiative torque mechanism, which is currently accepted as the dominant mechanism of grain alignment, open avenues to tracing magnetic fiel...
متن کاملGrain-grain collisions and sputtering in oblique C-type shocks
We use a model of the dissipation regions in C-type shocks in which two grain fluids are included to evaluate the rates at which grain-grain collisions and sputtering inject elemental silicon and water into the gas phase. For physical parameters typical of star forming regions, and on the assumption that a substantial fraction of the evaporated silicon is efficiently converted in SiO, the two g...
متن کاملSculpting sandcastles grain by grain: self-assembled sand towers.
We study the spontaneous formation of granular towers produced when dry sand is poured on a wet sand bed. When the liquid content of the bed exceeds a threshold value W*, the impacting grains have a nonzero probability to stick on the wet grains due to instantaneous liquid bridges created during the impact. The trapped grains become wet by the capillary ascension of water and the process contin...
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ژورنال
عنوان ژورنال: Intereconomics
سال: 1977
ISSN: 0020-5346,1613-964X
DOI: 10.1007/bf02929165