(n.) Oxide of tellurium. It occurs sparingly in tufts of white or yellowish crystals.
Example Sentences:
(1) Cell-free extracts of Thermus thermophilus HB8 catalyze the in vitro, NADH-dependent reduction of potassium tellurite (K2TeO3).
(2) Three different protein fractions with tellurite-reducing activities were identified.
(3) Transferable plasmids in gram-negative bacteria that confer resistance to potassium tellurite or tellurate were found.
(4) We have identified intrinsic high-level resistance (HLR) to tellurite, selenite, and at least 15 other rare-earth oxides and oxyanions in the facultative photoheterotroph Rhodobacter sphaeroides grown either chemoheterotrophically or photoheterotrophically.
(5) Unstained, unfixed bacteria carrying these plasmids contained black intracellular deposits when grown on media containing tellurite.
(6) Mitis salivarius agar (MS) and higher recovery values than modified medium 10 (MM10SB), Trypticase-yeast extract-cystine medium (TYC), or MS with 1% tellurite (MST).
(7) Chemical and biophysical mechanisms underlying the thiol-dependent lytic action of tellurite (and selenite) on human erythrocytes were investigated using native and GSH-depleted cells.
(8) The most stable differential signs of enterococci are: growth in the medium at pH 10.2, growth in broth containing 40% bile, citrate utilization, resistance to 0,05% potassium tellurite, 2, 3, 5-triphenyltetrazolium chloride (TTC) reduction, the staining of colonies (plaques) on a medium with manganese, iron and zinc salts, glycerine fermentation under anaerobic conditions, mannite fermentation, the presence of hemolysin, of the proteolytic enzyme, and mobility.
(9) M. phocacerebrale (13 strains) metabolized arginine but not glucose and produced phosphatase but did not reduce tetrazolium chloride and potassium tellurite.
(10) Doses of mixed intestinal gram-negative bacilli and enterococci were most effectively inhibited by Snyder tellurite agar.
(11) For instance, a correlation was found between the antigenic structure of the organism and the colonial appearance on tellurite blood agar.
(12) The identity of some selenite-resistant isolates and MICs of selenite, selenate, arsenate, tellurite, and tellurate were determined.
(13) By contrast, the lytic plaques produced by phages on rapidly growing mycobacteria with strong tellurite reactivity always display a sharp line of demarcation between the plaque and the non-lysed culture.The studies described in the present paper have shown that the tellurite zonal phenomenon provides a reliable criterion for the differentiation of slowly growing mycobacteria.
(14) The genes encoding tellurite resistance, colicin B resistance, and phage inhibition were found to be associated with a 6.7-kb SalI fragment of R478.
(15) Immuno-gold labelling and lysis studies using pilH alpha, a bacteriophage specific for H pili, were used to investigate transfer-deficient mutants of pHH1508a obtained by Tn5 mutagenesis and an in vitro constructed derivative of 96 kilobases, pDT1178, which also conferred resistance to potassium tellurite, trimethoprim, and streptomycin.
(16) The normally silent 4.5 kb tellurite resistance transposon Tn521 of RP4 has been shown to carry sequences from both the flanking kilA and korA loci of this broad host range plasmid.
(17) fermentation of sorbitol, glycerol (anaerobic) and melezitose, tolerance to potassium tellurite (0.1%) (positive for Strep.
(18) On a simple delayed response task, the performance of the tellurite-treated animals was more consistent than that of the buffer-treated animals.
(19) This assay is suitable for studying tellurite uptake in bacteria and overcomes the problems of older techniques which are time consuming and labor intensive.
(20) The tellurite resistance (Ter) determinant of RP4 is not normally expressed unless variants are selected on medium containing tellurite.
Tellurium
Definition:
(n.) A rare nonmetallic element, analogous to sulphur and selenium, occasionally found native as a substance of a silver-white metallic luster, but usually combined with metals, as with gold and silver in the mineral sylvanite, with mercury in Coloradoite, etc. Symbol Te. Atomic weight 125.2.
Example Sentences:
(1) Beryllium, cadmium, and tellurium assay data are reported for the fresh tissues of albino rats exposed to inorganic chemicals by oral or intraperitoneal routes.
(2) One of the earliest ultrastructural abnormalities in tellurium neuropathy is an increased number of cytoplasmic lipid droplets in myelinating Schwann cells.
(3) Exposure to tellurium resulted in an early marked decrease of approximately 50% in overall incorporation of [14C]acetate into lipids, with a preferential depression in synthesis of cerebrosides, cholesterol, and ethanolamine plasmalogens (components enriched in myelin).
(4) Ter plasmids from tellurium-resistant bacteria that were isolated from sewage and industrial wastes also mediated phage inhibition.
(5) Plasmids determining resistance to arsenic, mercury, silver, and tellurium compounds in Escherichia coli and Pseudomonas aeruginosa were tested for resistance to 40 other metal compounds.
(6) These data indicate that the tellurium-induced lipid droplets in Schwann cells are derived from newly synthesized lipid rather than from the early breakdown and internalization of myelin lipids.
(7) Tellurium-induced alterations in the metabolic capacity of Schwann cells were examined by measuring the synthesis of myelin lipids in vitro in isolated sciatic nerve segments.
(8) At the onset of acute demyelination induced by tellurium (Te) poisoning, macrophages infiltrated the endoneurium and then began to express cytoplasmic immunoreactivity for apolipoprotein E (apo E).
(9) Tellurium concentrations were measured in urine samples by means of graphite furnace atomic absorption spectroscopy (GFAAS) after wet ashing and a preconcentration of tellurium by solvent extraction with isobutyl methyl ketone (IBMK).
(10) The elements studied were arsenic, tellurium, tin, and lead.
(11) Membrane-delimited vacuoles, lipid droplets and cytoplasmic excrescences appeared in myelinating Schwann cells at 24 hr; demyelinating axons appeared at 48 hr of tellurium exposure.
(12) Reliable isotope ratios could be determined with sample fractions containing 1 ng of tellurium or even less.
(13) When analyzed on a 'per nerve' basis, steady-state mRNA levels for these two proteins were actually increased about 2-fold by 9 days after beginning tellurium exposure.
(14) These results imply that both selenium and tellurium can be incorporated into the protein molecule as the respective labile components.
(15) Message levels increased during the subsequent period of remyelination and reached near-normal levels 30 days after beginning tellurium exposure.
(16) A stable population of intraspinal Schwann cells, which developed following early postnatal irradiation of the spinal cord, was challenged by the addition of tellurium (Te) to the diet beginning at 30 days of age.
(17) Exposure of developing rats to tellurium results in a highly synchronous segmental demyelination of peripheral nerves with sparing of axons; this demyelination is followed closely by a period of rapid remyelination.
(18) In the prelabeled nerves, myelin became heavily labeled, but the tellurium-induced cytoplasmic lipid droplets were rarely labeled.
(19) The reaction can, however, be terminated, even in the presence of tellurite, by addition of N-ethylmaleimide, presumably due to the blockage of thiols or thiol-analogous tellurium compounds.
(20) The 123Xe yields from natural tellurium are too low for routine production.