2 edition of evaluation of tellurium compounds as polymer stabilisers. found in the catalog.
evaluation of tellurium compounds as polymer stabilisers.
Sera Saheb Abed-Ali
Thesis (PhD) - University of Aston in Birmingham, 1983.
Tellurium has long appeared as a nearly ‘forgotten’ element in Biology, with most studies focusing on tellurite, tellurate and a handful of organic tellurides. During the last decade, several discoveries have fuelled a renewed interest in this element. Bioincorporation of telluromethionine provides a new appCited by: 1 For submission to Journal of Applied Microbiology1 2 3 Bacterial recovery and recycling of tellurium from tellurium-containing 4 compounds by Pseudoalteromonas sp. EPR3 5 William D. Bonificio #, David R. Clarke 6 School of Engineering and Applied Sciences, Harvard University, Oxford St., 8 Cambridge, MA , United States 9 Running Title: Bacterial recovery10 of tellurium.
Molecular structure of some tellurium compounds determined by magnetic method S. S. Dharmatti 1 Proceedings of the Indian Academy of Sciences - Section A vol Article number: () Cite this articleCited by: 7. NANO EXPRESS Open Access Structural and Photoconductivity Properties of Tellurium/PMMA Films Gianfranco Carotenuto1, Mariano Palomba1*, Sergio De Nicola2*, Giuseppina Ambrosone2,3 and Ubaldo Coscia3,4 Abstract Owing to the very brittle nature of tellurium powder, nanoscopic grains with an average size of ± nm wereCited by:
Elemental tellurium is a p-type semiconductor that can be exploited for many technological applications in metallurgy, photovoltaics, photonics, electronics, and medicine .It has been used in the form of thin films or powder to fabricate gas sensors [2, 3], antiseptic materials , photoconductors [5–7], thermoelectric devices [8–11], etc. Usually, chemical and electrochemical Cited by: Novel tellurium compounds of the present invention have the formula: TeR 1 R 2. wherein R 1 is a fluorinated alkyl having the formula C n F (2n+1)-x H x where n may range from 1 to 6 and x may range from 0 to 2n, and R 2 is selected from the group consisting of alkyls having 2 to 6 carbon atoms, cycloalkyls having 3 to 6 carbon atoms, allyl, alkyl-substituted allyl having 4 to 6 carbon atoms.
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Tellurium compounds are chemical compounds of the chemical element tellurium. Note (New Dana Classification): Telluride minerals are in the category: Sulfides and Sulfosalts (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.) too; Tellurite minerals are in the category: Oxides (Hydroxides, V[5+,6+] vanadates, arsenites.
Tellurium is a chemical element with the symbol Te and atomic number It is a brittle, mildly toxic, rare, silver-white ium is chemically related to selenium and sulfur, all three of which are is occasionally found in native form as elemental ciation: /tɪˈljʊəriəm/ (tə-LEWR-ee-əm).
Tellurium evaluation of tellurium compounds as polymer stabilisers. book 16 was widely used in the past to introduce tellurium into organic substrates. It reacts with several functional groups giving organotellurium trichlorides 5 (X = Cl), which constitute an important class of tellurium electrophiles.
Tellurium tetrachloride 16 is prepared by passing a stream of dry chlorine over elemental tellurium in an appropriate glass apparatus.
Nanomaterials capable of achieving tunable cargo release kinetics are of significance in a fundamental sense and various biological or medical applications. We report a competitive coordination system based on a novel tellurium-containing polymer and its ligand-regulated release manners.
Tellurium was introduced to water-soluble polymers for the first time as drug delivery by: In compounds of tellurium (where known), the most common oxidation numbers of tellurium are: 6, 4, 2, and Hydrides.
The term hydride is used to indicate compounds of the type M x H y and not necessarily to indicate that any compounds listed behave as hydrides chemically. Wikimedia Commons has media related to Tellurium compounds.: Pages in category "Tellurium compounds" The following 19 pages are in this category, out of 19 total.
List of Tellurium Compounds, Common Compounds of Tellurium Te, Formula, Molecular Weight. Tellurium and iodine, in the molten condition, are iniscible in all proportions, and the system tellurium-iodine has been examined from the thermo-analytical standpoint, the freezing-point curve giving indications only of the formation of a tetra-iodide, TeI 4, in the fused mixture.
A tellurium di-iodide has been described by Berzelius as obtained when tellurium and iodine are sublimed. Tellurium (Te), semimetallic chemical element in the oxygen group (Group 16 [VIa] of the periodic table), closely allied with the element selenium in chemical and physical properties.
Tellurium is a silvery white element with properties intermediate between those of metals and nonmetals; it makes. The bond energy in the gaseous diatomic species TeTe is ± kJ mol Tellurium: bond enthalpies in gaseous diatomic species. The following values refer to neutral heterodiatomic molecules in the gas phase.
These numbers may well differ considerably from, say, single bond energies in a solid. Nevertheless, tellurium, as well as selenium, is often referred to as a metal when in elemental form.
Tellurium production is mainly a byproduct of copper processing. The 's brought growth in thermoelectric applications for tellurium, as well as its use in. Tellurium compounds (as Te) Related Pages. May Immediately Dangerous to Life or Health Concentrations (IDLH) CAS number: –80–9 (Metal) NIOSH REL: mg/m 3 TWA.
Current OSHA PEL: mg/m 3 TWA. OSHA PEL: Same as. Tellurium makes chemical compounds in several oxidation states: 2, +2, +4, and +6. -2 compounds are normally found in are strong reducing ides are normally the main ore of tellurium.
Most natural tellurides are not pure, so they are much less reactive. +2 compounds are found in some tellurium halides, like tellurium(II) chloride and tellurium(II) bromide. Tellurium toxicity is rare (Larner ), but it is of interest as a model system for study of the type of metabolic insult that can lead to specific demyelination.
Administration to weanling rats of a diet containing about 1% by weight of elemental tellurium induces a neuropathy within several days. Tellurium is primarily used as an alloying agent. Small amounts of tellurium are added to copper and stainless steel to make them easier to machine and mill.
Tellurium is also added to lead to increase its strength and resistance to sulfuric acid (H 2 SO 4). Tellurium forms many compounds, but none that are commercially important. A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.
Our prime concern in the evaluation of compounds 45a-g as GPx mimics was the influence of the chain length between the tellurium atom and amino acid moiety.
We found that compounds 45a and 45b derived from L-valine showed the same activity. Taking advantage of the modular characteristic of our synthetic route, we explored the influence of the. Tellurium. Tellurium is a semimetallic, lustrous, crystalline, brittle, silver-white element.
It is usually available as a dark grey powder, it has the properties both of the metals and the non metals. Tellurium forms many compounds corresponding to those of sulfur and selenium. When burned in air tellurium has a greenish-blue flame and forms. A tellurium containing polymer with pendant hydroxyl groups poly(Re-co-Te) was synthesized by the condensation reaction of resorcinol (Re) and tellurium tetrachloride (TeCl4), followed by the condensation reaction with adamantyl bromo acetate to give a corresponding polymer poly(Re-co-Te)-AD.
Their physical properties (solubility, film-forming Cited by: 1. A glimpse on biological activities of tellurium compounds RODRIGO L.O.R.
CUNHA,1,2 IURI E. GOUVEA2 and LUIZ JULIANO2 1Departamento de Ciências Exatas e da Terra, UNIFESP, Rua Artur Riedel,Jardim Eldorado, Diadema, SP, Brasil 2Departamento de Biofísica, UNIFESP, Rua Três de Maio,Vila Clementino, São Paulo, SP.
Good thermoelectric materials are often complex compounds. Here, the authors reveal that elemental tellurium has a high thermoelectric figure of Cited by: Tellurium and its compounds are probably toxic and should be handled with care. Workmen exposed to as little as mg/m 3 of air, or less, develop "tellurium breath," which has a garlic-like odor.
Isotopes. Thirty isotopes of tellurium are known, with atomic masses ranging from to Natural tellurium consists of eight isotopes. Uses.Tellurium compounds are the most common chemical compounds of gold found in nature.
Main uses of Tellurium. Used to improve the machining quality of metal products and to color glass and ceramics. Increasingly used in thermoelectric devices, including solar panels used to a lesser extent in vulcanization of rubber, percussion caps, battery.