BIOMAT Database Logo BIOMAT Database Logo

Photolysis in 131I, 35S or 14C labeled HgLSCN powders. 1978

In 1938, S.V. Raghava Rao reported that a crystal of HgXSCN (X=halogen) has photropic properties and in 1955, the author reported the mechanism of the phototropy is identical with that of HgI2.2HgS. However, a behavior of S, I and C atoms in the crystals irradiated by sunlight was not known. Purpose of this paper is to clarify the behavior of these atoms by using radioactive tracer technique. The results obtained show that when electrons belonging to S2- or I- ions absorb photons and are excited to upper state, these electrons leave behind neutral S or I atoms, which diffuse thermally toward the crystal surface and escape into atmosphere. 14C atoms do not escape. S atoms are more sensitive to light than I or C atoms.

UI MeSH Term Description Entries
D007457 Iodine Radioisotopes Unstable isotopes of iodine that decay or disintegrate emitting radiation. I atoms with atomic weights 117-139, except I 127, are radioactive iodine isotopes. Radioisotopes, Iodine
D007553 Isotope Labeling Techniques for labeling a substance with a stable or radioactive isotope. It is not used for articles involving labeled substances unless the methods of labeling are substantively discussed. Tracers that may be labeled include chemical substances, cells, or microorganisms. Isotope Labeling, Stable,Isotope-Coded Affinity Tagging,Isotopically-Coded Affinity Tagging,Affinity Tagging, Isotope-Coded,Affinity Tagging, Isotopically-Coded,Isotope Coded Affinity Tagging,Labeling, Isotope,Labeling, Stable Isotope,Stable Isotope Labeling,Tagging, Isotope-Coded Affinity,Tagging, Isotopically-Coded Affinity
D008628 Mercury A silver metallic element that exists as a liquid at room temperature. It has the atomic symbol Hg (from hydrargyrum, liquid silver), atomic number 80, and atomic weight 200.59. Mercury is used in many industrial applications and its salts have been employed therapeutically as purgatives, antisyphilitics, disinfectants, and astringents. It can be absorbed through the skin and mucous membranes which leads to MERCURY POISONING. Because of its toxicity, the clinical use of mercury and mercurials is diminishing.
D010782 Photolysis Chemical bond cleavage reactions resulting from absorption of radiant energy. Photodegradation
D011208 Powders Substances made up of an aggregation of small particles, as that obtained by grinding or trituration of a solid drug. In pharmacy it is a form in which substances are administered. (From Dorland, 28th ed) Powder
D002250 Carbon Radioisotopes Unstable isotopes of carbon that decay or disintegrate emitting radiation. C atoms with atomic weights 10, 11, and 14-16 are radioactive carbon isotopes. Radioisotopes, Carbon
D013462 Sulfur Radioisotopes Unstable isotopes of sulfur that decay or disintegrate spontaneously emitting radiation. S 29-31, 35, 37, and 38 are radioactive sulfur isotopes. Radioisotopes, Sulfur
D013861 Thiocyanates Organic derivatives of thiocyanic acid which contain the general formula R-SCN. Rhodanate,Rhodanates

Related Publications

No sufficiently related or similar publications found.

Copied contents to your clipboard!