منابع مشابه
Detection of mercury and other metals in mercury contaminated soils using mid-infrared spectroscopy
The Oak Ridge Reservation, established in 1942, was the designated site for the construction of the atomic bomb. During a 20-year period from 1944-1963 radioactive and toxic chemical pollutants, especially mercury compounds were released into the surrounding waterways. Mercury in the soil environment can undergo numerous chemical transformations. Conventional methods for detection of total soil...
متن کاملHLA-Association in Patients with Intolerance to Mercury and Other Metals in Dental Materials
A group of selected 25 patients with serious intolerance to heavy metals used for dental restoration were examined for HLA antigens. A significant increase for HLA -- B37, B47 and DR4 was found. The value of the relative risk is not significant after correction for the number of antigens tested and therefore further studies of more patients are needed.
متن کاملMercury and other heavy metals influence bacterial community structure in contaminated Tennessee streams.
High concentrations of uranium, inorganic mercury [Hg(II)], and methylmercury (MeHg) have been detected in streams located in the Department of Energy reservation in Oak Ridge, TN. To determine the potential effects of the surface water contamination on the microbial community composition, surface stream sediments were collected 7 times during the year, from 5 contaminated locations and 1 contr...
متن کاملAutism 2002 : Mercury, Heavy Metals... Toxicity AUTOIMMUNE PATHOGENESIS IN AUTISM
More than one million Americans suffer from autism spectrum disorders that also include an estimated one-half million people, mainly children, with a clinical diagnosis of autism. The disorder is identified not by a specific pathology but by behavioral manifestations. It is now generally believed that genetics are likely to explain no more than 10% of all autistic cases while the remainder 90% ...
متن کامل5.3 Relations with Other Models
A model of learning by distances is presented. In this model a concept is a point in a metric space. At each step of the learning process the student guesses a hypothesis and receives from the teacher an approximation of its distance to the target. A notion of a distance, measuring the proximity of a hypothesis to the correct answer, is common to many models of learnability. By focusing on this...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1887
ISSN: 0036-8733
DOI: 10.1038/scientificamerican10081887-9814asupp