emulsioonid 3. Millist infot dispersse süsteemi kohta annavad osakeste mõõtmete diferentsiaalne ja integraalne jaotuskõver? 4. Millest on tingitud valguse hajumine disperssetes süsteemides ja tõelistes lahustes? Milliste parameetritega iseloomustatakse kvantitatiivselt valguse hajumist? 5. Mille poolest erinevad nefelomeetria ja turbidimeetria meetodid? A nephelometer [1] is a stationary or portable instrument for measuring concentration of suspended particulates in a liquid or gas colloid. A nephelometer measures suspended particulates by employing a light beam (source beam) and a light detector set to one side (often 90°) of the source beam. Particle density is then a function of the light reflected into the detector from the particles. To some extent, how much light reflects for a given density of particles is dependent upon properties of the particles such as their shape, color, and reflectivity. Nephelometers
It has been linked many forms of cancer in natives of eastern Europe and Russia, as well as destroying animals and plants. December 1993, the total number of nuclear power plants in the United States is 109, collectively producing 610 billion kWhs of electricity. Nuclear power today Nuclear power is the world's largest source of emission-free energy. Nuclear power plants produce no controlled air pollutants, such as sulphur and particulates, or greenhouse gases. The use of nuclear power in place of other energy sources helps to keep the air clean, preserve the Earth's climate, avoid ground-level ozone formation and prevent acid rain. Nuclear power has important implications for our national security. Inexpensive nuclear power, in combination with fuel cell technology, could significantly reduce our dependency on foreign oil. Nuclear power plants have experienced an admirable safety record. About 20% of electricity
ethanol. When burned, ethanol does release carbon dioxide, a green house gas. But growing plants for ethanol may reduce greenhouse gases, since plants use carbon dioxide and produce oxygen as they grow. 49 Picture 14.2. The carbon cycle Biodiesel- Biodiesel is much less polluting than petroleum diesel. It results in much lower emissions of almost every pollutant: carbon dioxide, sulfur oxide, particulates, carbon monoxide, air toxics and unburned hydrocarbons. Biodiesel does have nitrogen oxide emissions that are about 10 percent higher though. Blending biodiesel into petroleum diesel can help reduce emissions. Biodiesel contains almost no sulfur and can help reduce sulfur in diesel fuel used throughout the country. COAL Coal is a combustible black or brownish-black sedimentary rock composed mostly of carbon and hydrocarbons
ambient air, and these contaminants can removed. Selection of suitable chemicals for easily find their way into the product. Air cleaning or for sanitation may require special withdrawn from the room to use in food- knowledge and could represent a difficult processing areas, such as preparation and task for the personnel involved. However, packaging areas, should require filtration or staff must be made aware that efficient clean- some other means of removing particulates. ing and disinfection is of utmost importance Moreover, the reduction of airborne mold for product safety and quality. spores content in ripening and aging rooms Detailed Standard Operating Procedures typical of dry-meat and fermented dry-meat (SOP) should be prepared to describe specific products processing plants is of paramount methods, types of cleaning/sanitizing solu- importance
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