finances several sight-restoration projects, including the artificial retina. Wide-ranging research is important, he said, because different methods could help different causes of blindness. The approaches include gene therapy, which has produced improved vision in people who are blind from one rare congenital disease. Stem cell research is considered promising, although far from producing results, and other studies involve a light-responding protein and retinal transplants. Others are implanting electrodes in monkeys' brains to see if directly stimulating visual areas might allow even people with no eye function to see. And recently, Sharron Kay Thornton, 60, from Smithdale, Miss., blinded by a skin condition, regained sight in one eye after doctors at the University of Miami Miller School of Medicine extracted a tooth (her eyetooth, actually), shaved it down and used it as a base for a plastic lens replacing her cornea.
measures. Dirty liquids and gases escaping under high pressure. Future prospects There must be more researches about many topics concerning biogas in order to make biogas technology applicable and to achieve success from the investments in this field. Researches done up until now have provided a good amount of information, but this is not enough. The fields that will be worked on first are stated below: Development of the way of implanting biogas plants according to the environmental conditions, Determining the cheap and regional isolation materials, Developing the biogas usage tools, Determining how biogas can be produced from herbal wastes, Researching the effects of the compost of biogas facilities on herbal production and soil characteristics, Developing the distribution and transportation mechanism of the compost from the biogas facilities, The calculation of contribution that biogas will have on environmental health
improved gain-to-feed ratio, hot carcass toughness. weight, and carcass yield. Zilpaterol increased Ellis et al. (1996) reported that longissi- loin muscle area. Both beta-agonists mus muscle from pig genotypes selected for decreased meat tenderness compared with the propensity to increase marbling are more controls. Smith et al. (2007b) reported that tender and juicy, and have lower shear values. implanting anabolic steroids increased hot The Duroc breed produces pork that is highly carcass weight and loin muscle area for both marbled with good eating quality (Ellis et al. heifers and steers. However, implants had no 1996). Brewer et al. (2002) reported that effect on dressing percent, fat thickness, chops from Duroc and Pietrain pigs had the yield grade, marbling score, intramuscular most visible marbling, while those from
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