Guest guest Posted October 18, 2003 Report Share Posted October 18, 2003 >From Sri Isopanisad (mantra 8) purport: "Because in all circumstances He (Krsna) is suddham, most purified, He is often compared to the sun. The sun extracts moisture from many untouchable places on the earth, yet it remains pure. In fact, it purifies obnoxious things by virtue of its sterilizing powers. If the sun, which is a material object, is so powerful, then we can hardly begin to imagine the purifying strength of the all-powerful Lord." >From BBC: Friday, 17 October, 2003, 23:00 GMT 00:00 UK Solar power cooks medical waste Cookers powered by the sun could be a cheap method for developing countries to dispose of hazardous medical waste. Solar-box cookers focus the sun's rays and produce temperatures of between 100 and 150 degrees centigrade - enough to kill the majority of harmful bacteria. The machines cost only £22 each - far less than incinerators or autoclaves. Experts writing in the Lancet say that only 20 minutes of sunshine in an hour should be enough to make the simple devices work. The problem of biomedical waste disposal is an expensive headache for clinics and hospitals throughout the developing world. Incinerators and autoclaves are costly to build and buy, and some waste ends up being dumped without decontamination, increasing the risk of disease spread. Simple design Solar ovens are already used in countries such as India not only for cooking, and experts from the Department of Microbiology at Choithram Hospital and Research Centre in Indore decided to test their potential to "cook" biomedical waste. The solar heating systems should provide a cheap disinfection option to treat infectious waste Researchers, Choithram Hospital, India Solar ovens are extremely simple, consisting of two foil covered boxes, one fitting inside the other. A sheet of transparent glass serves as a lid, and an angled mirror reflects extra sunlight into the box. It works on the same principles as a greenhouse, reaching high temperatures quickly. These are enough, say the researchers to pasteurise fluids placed within the box. Field tests Cotton wool contaminated with different bacterial samples such as Staphylcoccus and E.coli were placed in the box and kept in the oven for six hours during the day. Bacteria levels were reduced to a fraction of those measured at the start of the experiment. Other field trials using highly drug-resistant strains immersed in water were even more successful. "The present units can be used in small clinics and health centres," the researchers wrote. "Further, modification with parabolic or multiple mirror type solar cookers can provide much higher temperatures." They wrote: "The solar heating systems should provide a cheap disinfection option to treat infectious waste in countries that are less economically developed." Other doctors backed up this view. Kevin McGuigan and Siobhan Kehoe from the Royal College of Surgeons in Ireland wrote, also in the Lancet, that the solar cookers would be of benefit to "many communities". Quote Link to comment Share on other sites More sharing options...
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