In May, 1956 a conference was held at the New York Academy of Sciences on the subject "Anesthesia and Related Problems." The results of this conference are now presented in a series of 15 papers. On the whole these papers are characterized by an academic and objective approach to many of the clinical problems relating to anesthesia but because of their fundamental nature some of them can also b...

forty bacteria species commonly found in soil, sediments, and sewage effluent were exposed for acclimation to inorganic and organic mercury compounds using sterilized sediments as the culture medium. screening tests for the ability of microorganisms to methylate inorganic mercury were made on all 40 species after acclimation to 13.5 mg/i mercuric chloride. additional screening tests for demethy...

Mercury is a silvery white liquid metal that is volatile at room temperature due to its high vapour pressure. It exists in different oxidation states and can form a number of compounds. Mercury and its compounds can be absorbed into the human body by inhalation, ingestion, and through the skin. It is toxic when certain threshold values are exceeded. Acute toxicity is due to the inactivation of ...

Changes in urinary porphyrin excretion patterns (porphyrin profiles) have been described in response to a variety of drugs and chemicals. The present studies were conducted to define the specific changes in the urinary porphyrin profile associated with prolonged exposure to mercury and mercury compounds. In rats, exposure for a prolonged period to mercury as methyl mercury hydroxide was associa...

Mercury at low concentrations represents a major hazard to microorganisms. Inorganic mercury has been reported to produce harmful effects at 5 microg/l in a culture medium. Organomercury compounds can exert the same effect at concentrations 10 times lower than this. The organic forms of mercury are generally more toxic to aquatic organisms and birds than the inorganic forms. Aquatic plants are ...

All mercurial compounds are toxic and they affect many organ systems both during pre-natal and post-natal development and in adulthood. Mercury compounds are neurotoxic. Some are immunologically active. The main toxicity stems from the binding of mercury to sulfhydryl groups of enzymes and other proteins, thereby disrupting their structure and function. This interferes with basic cellular proce...

This chapter first presents available measurement data for mercury in environmental media and biota. This is followed by a discussion of efforts to collect measurement data from remote locations and near anthropogenic sources of concern. Note that this chapter does include measured mercury concentrations in wildlife that function as vectors to humans but does not include measured concentrations...

OBJECTIVES To determine contact allergies in patients with oral lichen planus and to monitor the effect of partial or complete replacement of amalgam fillings following a positive patch test reaction to ammoniated mercury, metallic mercury, or amalgam. DESIGN In group A (20 patients), the oral lesions were confined to areas in close contact with amalgam fillings. In group B (20 patients), the...