inputs. 208 Analog Interfacing to Embedded Microprocessors Just like ordinary ground loops, ESD can get into your circuits via the grounds. ESD can affect circuits with grounds that are otherwise excellent for carrying their intended current because the ESD energy is high-frequency. A good ground at DC is not necessarily a good (low-impedance) ground at RF frequencies. In fact, one way to find grounding problems is to use an artifi- cial ESD generator and zap the chassis of your equipment. The circuits most affected (or most often affected) are often those with grounding problems. Self-Induced ESD Any time you have a motor-driven system with belts, pulleys, plastic gears, or other insulating, moving components, you have the potential for self-induced ESD. Depending on the materials used, a belt running over a pulley can be an excellent Van DeGraff generator. Figure 8.7 illustrates a practical system
animals. In an effort to improve the nutri- dose-dependent manner. Boler et al. (2009) tional profile of pork, Janz et al. (2008) fed found that feeding natural sources of vitamin pigs a plant-based diet containing conjugated E to finishing pigs was more effective in linoleic acid, selenium, and vitamin E. The reducing lipid oxidation of pork during sub- dietary treatments had some effects on meat sequent storage and display than were artifi- quality, but the overall effects on appearance cial sources. Yang et al. (2002) found that and palatability were small. meat from pasture-fed cattle contained as Diet can shift the bone/muscle/fat ratio of much alpha-tocopherol as grain-fed cattle beef carcasses. Grain feeding (high-energy supplemented with 2500 IU vitamin E. It diet) usually increases carcass weight and contained a higher percentage of linolenic
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