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By the combination of transducers (thermistors, selective electrodes, field-effect transistors, optical systems) with immobilized enzymes or antibodies specific sensors for biologically relevant substances are obtained. The construction, ranges, of linearity, response times and stability of biosensors are demonstrated. Examples are given for their application in clinical analysis and fermentation control. Finally limits and future possibilities are discussed. 相似文献
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The Science of Nature - 相似文献
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Michaelowa Axel Schmidt Holger 《Mitigation and Adaptation Strategies for Global Change》1997,2(1):45-56
Joint Implementation is a theoretically efficient instrument of climate policy at least in the short run. This need not apply
for the long run. Joint Implementation can reduce innovation in the industrialized countries because of reduced incentives
for emission reduction. To realize short run efficiency gains and to avoid long run efficiency losses, we need a ‘strategic’
climate policy. This policy should start with full crediting of Joint Implementation allowing short-run efficiency gains which
can foster technology transfer and thus lead to ‘leapfrogging’ by developing countries. Over time, the crediting ratio should
be gradually reduced while domestic carbon taxes are raised. Experiences from the second oil shock have shown that energy-saving
innovation is positively correlated to energy prices. Both, the reduced crediting and the raising domestic carbon tax, will
therefore lead to long-run innovation. 相似文献
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Martin M. Karpiscak Kennith E. Foster Nancy Schmidt 《Journal of the American Water Resources Association》1990,26(6):939-948
ABSTRACT: A single-family residence in Tucson, Arizona, was retrofitted with water-conserving fixtures, rainwater harvesting, and graywater reuse systems. During a four-year study, efficient use of water was shown to significantly decrease demand for domestic water at the house without reducing the residents' quality of life. The use of municipal water was reduced by 66 percent to 148 gallons per day (gpd) and total household use was reduced by 27 percent to 245 gpd. Graywater reuse averaged approximately 77 gpd or 32 percent of the total household water use. Evaporative cooling required about 15 gpd. Water use for toilet flushing was only 9 gallons per capita per day (gpcd) or 14 percent of interior water use. 相似文献