(a.) Of, pertaining to, or containing, selenium; specifically, designating those compounds in which the element has a lower valence as contrasted with selenic compounds.
Example Sentences:
(1) Each rat was subjected to a 1-cm full-thickness aortotomy and then immediately injected by tail vein with c 5 muCi of one of the following radioisotopes: chromic chloride Cr 51 or sodium chromate Cr 51; ferrous chloride Fe 59 or ferric chloride Fe 59; manganous chloride Mn 54; selenious acid Se 75; strontium chloride Sr 85; or zinc chloride Zn 65.
(2) The purpose of this study was to determine the effect of parenteral selenium as selenious acid on the selenium status of seven long-term TPN patients.
(3) Seleniated tRNA species as well as seleniated polypeptides were formed by all organisms tested.
(4) Moreover, the E. coli fdhF gene was expressed in Salmonella typhimurium, Serratia marcescens and Proteus mirabilis, indicating a high degree of conservation of the seleniating system throughout the enterobacteria.
(5) Human umbilical vein endothelial cells were metabolically labeled with either [35S]methionine or [75Se]selenious acid, and HL-60 cells and Hep G2 cells were metabolically labeled with [75Se]selenious acid.
(6) "Super Blue" contains 4% selenious acid and 2.5% cupric sulfate in HCl.
(7) We describe a patient who died eight days after ingesting selenious acid in the form of gun blueing.
(8) Sensitive and selective methodology is described for the simultaneous determination of thiols, disulfides and bis(alkylthio)selenides in mixtures formed by reaction of selenious acid with thiols.
(9) Acute selenious acid poisoning and its relation to Legionnaire's disease is discussed.
(10) Our results demonstrate that selenium dioxide, in the presence of moist air, is completely recovered (apparently as selenious acid aerosols) and that the previous shortfalls must be due to other selenium species as yet unidentified.
(11) Selenium, as selenomethionine, selenocystine, or selenious acid, activated both capillary and aortal endothelial cells of bovine origin.
(12) A 2 yo male child ingested approximately 15 ml of a Gun Blue solution containing selenious acid, nitric acid and copper nitrate.
(13) Rats injected with aurothioglucose (ATG) for 5 days were subsequently injected with [75Se]selenious acid and killed after 3 days.
(14) Selenious acid aerosols in our study were formed by volatilizing selenium dioxide (approximately 3 mg) into a stream of moist ambient air (relative humidity, greater than 50%), and trapped on glass fiber filters using a high-volume air sampler.
(15) Reduction of selenious acid (H2SeO3) to elemental Se by ascorbic acid was investigated in regard to the stability of selenite in total parenteral nutrition (TPN) solutions.
(16) After ingestion of an unknown amount of a gun blueing compound containing selenious acid (11 ml from the bottle fluid were missing, equivalent to 2.9 g Se) a 2-year-old girl suffered from continuous hyper-salivation, vomiting, diarrhoea, restlessness and muscle spasm.
(17) [75Se]Selenious acid (6 nM) was added to primary cultures of rat hepatocytes and protein incorporation was assessed by SDS-PAGE and autoradiography.
(18) When the replacement of Se (selenious acid) began, there was a rapid increase (within 6 h) in plasma GSHPx activity.
(19) It was concluded that alpha-tocopherol acetate and selenium as selenious acid are stable in parenteral solutions and no significant loss occurs during delivery to patients.
Selenium
Definition:
(n.) A nonmetallic element of the sulphur group, and analogous to sulphur in its compounds. It is found in small quantities with sulphur and some sulphur ores, and obtained in the free state as a dark reddish powder or crystalline mass, or as a dark metallic-looking substance. It exhibits under the action of light a remarkable variation in electric conductivity, and is used in certain electric apparatus. Symbol Se. Atomic weight 78.9.
Example Sentences:
(1) It was tested for recovery and separation from other selenium moieties present in urine using both in vivo-labeled rat urine and human urine spiked with unlabeled TMSe.
(2) Dietary factors affect intestinal P450s markedly--iron restriction rapidly decreased intestinal P450 to beneath detectable values; selenium deficiency acted similarly but was less effective; Brussels sprouts increased intestinal AHH activity 9.8-fold, ECOD activity 3.2-fold, and P450 1.9-fold; fried meat and dietary fat significantly increased intestinal EROD activity; a vitamin A-deficient diet increased, and a vitamin A-rich diet decreased intestinal P450 activities; and excess cholesterol in the diet increased intestinal P450 activity.
(3) Mice exhibiting this suppression of immunity had levels of blood glutathione peroxidase, serum selenium, and liver DNA, RNA and protein similar to mice receiving selenium only.
(4) Excess levels of selenium (2.5 and 5 ppm) in the vitamin E-deficient diet had little or no effect on spleen size or hematocrit of rats not receiving lead, but partially prevented the splenomegaly and anemia of red cells from either non-poisoned or lead-oisoned vitamin E-deficient rats, but not as effectively as vitamin E. These results show that vitamin E status of rats is more important that selenium status in determining response to toxic levels of lead.
(5) Plasma selenium concentration and glutathione peroxidase activity in the subjects who died within 1 year of screening were 89% and 88%, respectively, of the values among survivors (p less than 0.01).
(6) Although selenium deficiency in livestock is consequently now rare in Oregon, selenium-deficient soils and attendant selenium deficiency conditions have been reported near the Kesterson Wildlife Refuge in the Northern part of the San Joaquin Valley, California, where, paradoxically, selenium toxicity in wildfowl, nesting near evaporation ponds, occurred and attracted wide attention.
(7) The synthetic "C" nucleoside, tiazofurin (2-beta-D-ribofuranosylthiazole-4-carboxamide), its selenium analogue selenazofurin, and the related inhibitor of inosine 5'-phosphate (IMP) dehydrogenase, mycophenolic acid, are effective inducers of the terminal differentiation of HL-60 promyelocytic leukemia cells.
(8) Thus, in this population with intermediate selenium intake, low serum selenium is not associated with an excess risk of myocardial infarction.
(9) Liver, blood, kidney and lungs were found to contain most of the selenium, here also a two-phased elimination was observed.
(10) These findings suggest that neither serum levels of selenium nor those of retinol have an appreciable effect on the risk of cancer.
(11) The incidences of esophageal tumors were statistically not significant among rats on normal, high and low selenium intake (P greater than 0.05).
(12) Alteration of guinea pig erythrocyte superoxide dismutase activity by the dietary antioxidants ascorbic acid and selenium was investigated.
(13) The more severe was the PIH the lower was the selenium level.
(14) Significantly lower selenium values were observed in blood from colorectal cancer patients than from normal individuals (0.1349 ppm vs. 0.1502 ppm.
(15) Selenium-deficient rats were used to examine the nature of the oxidant stress.
(16) Although treatment with beta-carotene tended to decrease the incidence and number of large intestinal carcinomas, beta-carotene, selenium, esculin and eugenol all decreased the incidence of kidney nephroblastomas, the differences were not statistically significant.
(17) These studies were designed to measure leukotriene B4 (LTB4) production by polymorphonuclear leukocytes (PMN) from selenium (Se)-deficient and Se-adequate goats.
(18) Copper deficiency impairs cell-mediated immunity, as does selenium deficiency when it is associated with vitamin E lack.
(19) Many forms of selenium supplement are commercialized.
(20) The possibility that a sub-clinical deficiency of the trace element selenium might exist in a sample of the British population was examined by giving a selenium supplemented for 5 weeks.