Rhodium: Rhodium. A hard and rare metal of the platinum group, atomic number 45, atomic weight 102.905, symbol Rh. (Dorland, 28th ed)Alkenes: Unsaturated hydrocarbons of the type Cn-H2n, indicated by the suffix -ene. (Grant & Hackh's Chemical Dictionary, 5th ed, p408)Organometallic Compounds: A class of compounds of the type R-M, where a C atom is joined directly to any other element except H, C, N, O, F, Cl, Br, I, or At. (Grant & Hackh's Chemical Dictionary, 5th ed)Cyclization: Changing an open-chain hydrocarbon to a closed ring. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)Alkynes: Hydrocarbons with at least one triple bond in the linear portion, of the general formula Cn-H2n-2.Amination: The creation of an amine. It can be produced by the addition of an amino group to an organic compound or reduction of a nitro group.Catalysis: The facilitation of a chemical reaction by material (catalyst) that is not consumed by the reaction.Stereoisomerism: The phenomenon whereby compounds whose molecules have the same number and kind of atoms and the same atomic arrangement, but differ in their spatial relationships. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)Copyright: It is a form of protection provided by law. In the United States this protection is granted to authors of original works of authorship, including literary, dramatic, musical, artistic, and certain other intellectual works. This protection is available to both published and unpublished works. (from Circular of the United States Copyright Office, 6/30/2008)ArchivesPancreatin: A mammalian pancreatic extract composed of enzymes with protease, amylase and lipase activities. It is used as a digestant in pancreatic malfunction.Carbonates: Salts or ions of the theoretical carbonic acid, containing the radical CO2(3-). Carbonates are readily decomposed by acids. The carbonates of the alkali metals are water-soluble; all others are insoluble. (From Grant & Hackh's Chemical Dictionary, 5th ed)Sodium Fluoride: A source of inorganic fluoride which is used topically to prevent dental caries.Tryptamines: Decarboxylated monoamine derivatives of TRYPTOPHAN.Caseins: A mixture of related phosphoproteins occurring in milk and cheese. The group is characterized as one of the most nutritive milk proteins, containing all of the common amino acids and rich in the essential ones.Tryptophan: An essential amino acid that is necessary for normal growth in infants and for NITROGEN balance in adults. It is a precursor of INDOLE ALKALOIDS in plants. It is a precursor of SEROTONIN (hence its use as an antidepressant and sleep aid). It can be a precursor to NIACIN, albeit inefficiently, in mammals.Hydrogenation: Addition of hydrogen to a compound, especially to an unsaturated fat or fatty acid. (From Stedman, 26th ed)Iridium: A metallic element with the atomic symbol Ir, atomic number 77, and atomic weight 192.22.Nobel PrizeSearch Engine: Software used to locate data or information stored in machine-readable form locally or at a distance such as an INTERNET site.Nursing Homes: Facilities which provide nursing supervision and limited medical care to persons who do not require hospitalization.Thiamine: 3-((4-Amino-2-methyl-5-pyrimidinyl)methyl)-5-(2- hydroxyethyl)-4-methylthiazolium chloride.History, 20th Century: Time period from 1901 through 2000 of the common era.Home Care Services: Community health and NURSING SERVICES providing coordinated multiple services to the patient at the patient's homes. These home-care services are provided by a visiting nurse, home health agencies, HOSPITALS, or organized community groups using professional staff for care delivery. It differs from HOME NURSING which is provided by non-professionals.Investments: Use for articles on the investing of funds for income or profit.Dental Staff: Personnel who provide dental service to patients in an organized facility, institution or agency.Capital Financing: Institutional funding for facilities and for equipment which becomes a part of the assets of the institution.Electrolysis: Destruction by passage of a galvanic electric current, as in disintegration of a chemical compound in solution.AcrylatesHydrochloric Acid: A strong corrosive acid that is commonly used as a laboratory reagent. It is formed by dissolving hydrogen chloride in water. GASTRIC ACID is the hydrochloric acid component of GASTRIC JUICE.Patents as Topic: Exclusive legal rights or privileges applied to inventions, plants, etc.Corrosion: The gradual destruction of a metal or alloy due to oxidation or action of a chemical agent. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Water Pollutants, Chemical: Chemical compounds which pollute the water of rivers, streams, lakes, the sea, reservoirs, or other bodies of water.History, 17th Century: Time period from 1601 through 1700 of the common era.Lithotripsy: The destruction of a calculus of the kidney, ureter, bladder, or gallbladder by physical forces, including crushing with a lithotriptor through a catheter. Focused percutaneous ultrasound and focused hydraulic shock waves may be used without surgery. Lithotripsy does not include the dissolving of stones by acids or litholysis. Lithotripsy by laser is LITHOTRIPSY, LASER.Gift Giving: The bestowing of tangible or intangible benefits, voluntarily and usually without expectation of anything in return. However, gift giving may be motivated by feelings of ALTRUISM or gratitude, by a sense of obligation, or by the hope of receiving something in return.Lanthanoid Series Elements: Elements of the lanthanoid series including atomic number 57 (LANTHANUM) through atomic number 71 (LUTETIUM).Heart: The hollow, muscular organ that maintains the circulation of the blood.Rhenium: Rhenium. A metal, atomic number 75, atomic weight 186.2, symbol Re. (Dorland, 28th ed)Vapor Pressure: The contribution to barometric PRESSURE of gaseous substance in equilibrium with its solid or liquid phase.Chlorine: A greenish-yellow, diatomic gas that is a member of the halogen family of elements. It has the atomic symbol Cl, atomic number 17, and atomic weight 70.906. It is a powerful irritant that can cause fatal pulmonary edema. Chlorine is used in manufacturing, as a reagent in synthetic chemistry, for water purification, and in the production of chlorinated lime, which is used in fabric bleaching.Chlorine Compounds: Inorganic compounds that contain chlorine as an integral part of the molecule.Contracts: Agreements between two or more parties, especially those that are written and enforceable by law (American Heritage Dictionary of the English Language, 4th ed). It is sometimes used to characterize the nature of the professional-patient relationship.Sodium Chloride: A ubiquitous sodium salt that is commonly used to season food.Solutions: The homogeneous mixtures formed by the mixing of a solid, liquid, or gaseous substance (solute) with a liquid (the solvent), from which the dissolved substances can be recovered by physical processes. (From Grant & Hackh's Chemical Dictionary, 5th ed)Saline Solution, Hypertonic: Hypertonic sodium chloride solution. A solution having an osmotic pressure greater than that of physiologic salt solution (0.9 g NaCl in 100 ml purified water).Chlorides: Inorganic compounds derived from hydrochloric acid that contain the Cl- ion.Calcium Chloride: A salt used to replenish calcium levels, as an acid-producing diuretic, and as an antidote for magnesium poisoning.Chemistry, Inorganic: A field of chemistry which pertains to chemical compounds or ions that do not contain the element carbon (with the exception of carbon dioxide and compounds containing a carbonate radical, e.g., calcium carbonate).Chemistry, Organic: The study of the structure, preparation, properties, and reactions of carbon compounds. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Coordination Complexes: Neutral or negatively charged ligands bonded to metal cations or neutral atoms. The number of ligand atoms to which the metal center is directly bonded is the metal cation's coordination number, and this number is always greater than the regular valence or oxidation number of the metal. A coordination complex can be negative, neutral, or positively charged.BooksTransition Elements: Elements with partially filled d orbitals. They constitute groups 3-12 of the periodic table of elements.

The interaction of rhodium(II) carboxylates with enzymes. (1/243)

The effect of rhodium(II) acetate, propionate, and methoxyacetate on the activity of 17 enzymes was evaluated. The enzymes were preincubated with the rhodium(II) complexes in order to detect irreversible inhibition. All enzymes that have essential sulfhydryl groups in or near their active site were found to be irreversibly inhibited. Those enzymes without essential sulfhydryl groups were not affected. In each case, the rate of inactivation closely paralleled the observed toxicity and antitumor activity of rhodium(II) carboxylates; that is, rhodium(II) propionate greater than rhodium(II) acetate greater than rhodium(II) methoxyacetate. In addition, those enzymes that have been demonstrated to be most sensitive to established sulfhydryl inhibitors, such as glyceraldehyde-3-phosphate dehydrogenase, were also most sensitive to rhodium(II) carboxylate inactivation. Proton nuclear magnetic resonance measurements made during the titration of rhodium(II) acetate with cysteine showed that breakdown of the carboxylate cage occurred as a result of reaction with this sulfhydryl-containing amino acid.  (+info)

Long-range oxidative damage to DNA: effects of distance and sequence. (2/243)

INTRODUCTION: Oxidative damage to DNA in vivo can lead to mutations and cancer. DNA damage and repair studies have not yet revealed whether permanent oxidative lesions are generated by charges migrating over long distances. Both photoexcited *Rh(III) and ground-state Ru(III) intercalators were previously shown to oxidize guanine bases from a remote site in oligonucleotide duplexes by DNA-mediated electron transfer. Here we examine much longer charge-transport distances and explore the sensitivity of the reaction to intervening sequences. RESULTS: Oxidative damage was examined in a series of DNA duplexes containing a pendant intercalating photooxidant. These studies revealed a shallow dependence on distance and no dependence on the phasing orientation of the oxidant relative to the site of damage, 5'-GG-3'. The intervening DNA sequence has a significant effect on the yield of guanine oxidation, however. Oxidation through multiple 5'-TA-3' steps is substantially diminished compared to through other base steps. We observed intraduplex guanine oxidation by tethered *Rh(III) and Ru(III) over a distance of 200 A. The distribution of oxidized guanine varied as a function of temperature between 5 and 35 degrees C, with an increase in the proportion of long-range damage (> 100 A) occurring at higher temperatures. CONCLUSIONS: Guanines are oxidized as a result of DNA-mediated charge transport over significant distances (e.g. 200 A). Although long-range charge transfer is dependent on distance, it appears to be modulated by intervening sequence and sequence-dependent dynamics. These discoveries hold important implications with respect to DNA damage in vivo.  (+info)

The effect of the antiscatter grid on full-field digital mammography phantom images. (3/243)

Computer Analysis of Mammography Phantom Images (CAMPI) is a method for making quantitative measurements of image quality. This article reports on a recent application of this method to a prototype full-field digital mammography (FFDM) machine. Images of a modified ACR phantom were acquired on the General Electric Diagnostic Molybdenum Rhodium (GE-DMR) FFDM machine at a number of x-ray techniques, both with and without the scatter reduction grid. The techniques were chosen so that one had sets of grid and non-grid images with matched doses (200 mrads) and matched gray-scale values (1500). A third set was acquired at constant 26 kVp and varying mAs for both grid conditions. Analyses of the images yielded signal-to-noise-ratio (SNR), contrast and noise corresponding to each target object, and a non-uniformity measure. The results showed that under conditions of equal gray-scale value the grid images were markedly superior, albeit at higher doses than the non-grid images. Under constant dose conditions, the non-grid images were slightly superior in SNR (7%) but markedly less uniform (60%). Overall, the grid images had substantially greater contrast and superior image uniformity. These conclusions applied to the whole kVp range studied for the Mo-Mo target filter combination and 4 cm of breast equivalent material of average composition. These results suggest that use of the non-grid technique in digital mammography with the GE-DMR-FFDM unit, is presently not warranted. With improved uniformity correction procedure, this conclusion would change and one should be able to realize a 14% reduction in patient dose at the same SNR by using a non-grid technique.  (+info)

Ca(2+)- and metabolism-related changes of mitochondrial potential in voltage-clamped CA1 pyramidal neurons in situ. (4/243)

In hippocampal slices from rats, dialysis with rhodamine-123 (Rh-123) and/or fura-2 via the patch electrode allowed monitoring of mitochondrial potential (DeltaPsi) changes and intracellular Ca(2+) ([Ca(2+)](i)) of CA1 pyramidal neurons. Plasmalemmal depolarization to 0 mV caused a mean [Ca(2+)](i) rise of 300 nM and increased Rh-123 fluorescence signal (RFS) by +info)

Robust charge transport in DNA double crossover assemblies. (5/243)

BACKGROUND: Multiple-stranded DNA assemblies, encoded by sequence, have been constructed in an effort to self-assemble nanodevices of defined molecular architecture. Double-helical DNA has been probed also as a molecular medium for charge transport. Conductivity studies suggest that DNA displays semiconductor properties, whereas biochemical studies have shown that oxidative damage to B-DNA at the 5'-G of a 5'-GG-3' doublet can occur by charge transport through DNA up to 20 nm from a photo-excited metallointercalator. The possible application of DNA assemblies, in particular double crossover (DX) molecules, in electrical nanodevices prompted the design of a DNA DX assembly with oxidatively sensitive guanine moieties and a tethered rhodium photo-oxidant strategically placed to probe charge transport. RESULTS: DX assemblies support long-range charge transport selectively down the base stack bearing the intercalated photo-oxidant. Despite tight packing, no electron transfer (ET) crossover to the adjacent base stack is observed. Moreover, the base stack of a DX assembly is well-coupled and less susceptible than duplex DNA to stacking perturbations. Introducing a double mismatch along the path for charge transport entirely disrupts long-range ET in duplex DNA, but only marginally decreases it in the analogous stack within DX molecules. CONCLUSIONS: The path for charge transport in a DX DNA assembly is determined directly by base stacking. As a result, the two closely packed stacks within this assembly are electronically insulated from one another. Therefore, DX DNA assemblies may serve as robust, insulated conduits for charge transport in nanoscale devices.  (+info)

Induction of chromosomal aberrations by the rhodium(III) complex cis-[Rh(biq)(2)Cl(2)]Cl in cultured human lymphocytes. (6/243)

The genotoxicity of the rhodium(III) complex cis-[Rh(biq)(2)Cl(2)]Cl (complex R) in cultured human lymphocytes was studied using the chromosome aberrations (CAs) assay. Lymphocyte cultures were initiated from two adult healthy non-smoking male volunteers and were exposed to the complex for a duration of 3 or 20 h prior to cell collection. The reduction in mitotic indices (MI) and the induction of CAs represented the toxic and clastogenic effects of the different treatments, respectively. Complex R proved to be an intermediate toxic clastogen with a MI(50) of 1.0 microg/ml and a minimum positive dose (MPD) of 0.1 microg/ml. Like bleomycin, complex R exerted its clastogenic effects without the need for metabolic activation and induced CAs of all types in lymphocytes treated in the G(2) and late S phases and, therefore, can be considered a radiomimetic. In addition, it induced more total CAs of chromatid-type than of chromosome-type. The reduction in the frequencies of CAs following the 20 h treatment as compared with those induced following the 3 h treatments indicated that human lymphocytes in the presence of complex R can partially tolerate the lesions involved in CA production. Based on the biological effects of complex R and the similarities between its functional group and that of bleomycin, possible mechanisms for complex R genotoxicity are discussed.  (+info)

Effects of cis-Dichlorudiammineplatinum (II) and related transition metal complexes on Escherichia Coli. (7/243)

A number of transition metal complexes, including the cis and trans isomers of dichlorodiammineplatinum (II), six complexes of rhodium (I), two of iridium (I), and one of ruthenium (II) have been tested for their ability to induce lambda prophage, to produce filamentous growth of Escherichia coli, and to be selectively toxic for strains with defects in the deoxyribonucleic acid repair system. Dichlorotetrakis(dimethylsulfoxide)ruthenium II [RuCl(2) (DMSO)(4)] was strictly similar to cis-dichlorodiammineplatinum II [cis PtCl(2) (NH(3))(2)] in the test for lambda induction, filamentous growth production, and selective toxicity for a recA(-) strain. [Rh COD 1,10-phenanthroline](+) Cl(-), though more toxic for recA(-) than for rec(+)E. coli, was scarcely effective in the test for filamentous growth and did not induce prophage. None of the other tested compounds showed any similarity with cis-PtCl(2)(NH(3))(2). Due to the interesting results obtained with cis-PtCl(2)(NH(3))(2) as an antitumor agent, it seems reasonable to propose RuCl(2)(DMSO)(4) as a potential antitumor substance.  (+info)

Charge transport through DNA four-way junctions. (8/243)

Long range oxidative damage as a result of charge transport is shown to occur through single crossover junctions assembled from four semi-complementary strands of DNA. When a rhodium complex is tethered to one of the arms of the four-way junction assembly, thereby restricting its intercalation into the pi-stack, photo-induced oxidative damage occurs to varying degrees at all guanine doublets in the assembly, though direct strand scission only occurs at the predicted site of intercalation. In studies where the Mg(2+) concentration was varied, so as to perturb base stacking at the junction, charge transport was found to be enhanced but not to be strongly localized to the arms that preferentially stack on each other. These data suggest that the conformations of four-way junctions can be relatively mobile. Certainly, in four-way junctions charge transport is less discriminate than in the more rigidly stacked DNA double crossover assemblies.  (+info)

  • Subject of this study were syntheses of diazoacetamides and diazoacetoacetamides which were catalyzed with different ruthenium(I,I)- and rhodium(II,II)-catalysts to form via a carbenoid C-H-insertion beta- and gamma-lactams. (uni-ulm.de)
  • In the presence of a rhodium/(S)-binap catalyst in THF at 20 8C, the catalytic 1,4-addition gives titanium enolates as 1,4-addition products with high enantioselectivity. (docme.ru)
  • The reaction of a variety of aryl- and heteroarylacetylenes proceeded at room temperature using a combination of a 8-quinolinolato rhodium complex and P(p-MeOC 6 H 4 ) 3 as a catalyst. (elsevier.com)
  • The reaction of a variety of aryl- and heteroarylacetylenes proceeded at room temperature using a combination of a 8-quinolinolato rhodium complex and P(p-MeOC6H 4)3 as a catalyst. (elsevier.com)
  • Herein we report another rhodium-catalyzed asymmetric arylation in which the addition of aryl titanium reagents to sulfonylimines proceeds with high enantioselectivity under mild conditions (20 8C, 1 h) to give diarylmethyl amines with up to 96 % ee. (docme.ru)
  • Sakai, K , Kochi, T & Kakiuchi, F 2011, ' Rhodium-catalyzed anti-markovnikov addition of secondary amines to arylacetylenes at room temperature ', Organic Letters , vol. 13, no. 15, pp. 3928-3931. (elsevier.com)
  • Rhodium (Rh) complexes have high reactivity and selectivity and could be used in the hydroformylation of long chain alkenes to form aldehydes - an important industrial process. (matthey.com)
  • During our studies on rhodium-catalyzed asymmetric 1,4additions to a,b-unsaturated ketones, we found that the phenyltitanium reagent PhTi(OiPr)3 is highly reactive toward transmetalation and forms a phenyl-rhodium bond. (docme.ru)
  • Rhodium has proven to be an extremely useful metal due to its ability to catalyze an array of synthetic transformations, with quite often-unique selectivity. (wiley.com)
  • Among the current nanoparticles, maghemite associated with rhodium citrate (Magh-RhCit) has been shown to be promising, because it reduces side effects of drugs while maintaining cytotoxicity for tumor cells. (bioinfor.com)
  • Later, rhodium citrate was associated with nanoparticles. (bioinfor.com)
  • Rhodium market- Mine production, major market players- Consumption worldwide, structure- Trade of rhodium unwrought or in powder form, rhodium in semi-manufactured forms8.2. (prnewswire.co.uk)
  • Table 1: Rhodium-catalyzed asymmetric arylation of imines 1 a-3 a with PhTi(OiPr)3 (4 a).[a] 6252 Scheme 2. (docme.ru)
  • Handmade 18-karat rhodium white gold gray diamonds, total weight: 13.16-carats detachable lobster clasp-fastening chain, detachable bar fastening this piece has been certified in accordance with the hallmarking act 1973. (lyst.com)
  • Naturally occurring rhodium is usually found as the free metal, alloyed with similar metals, and rarely as a chemical compound in minerals such as bowieite and rhodplumsite. (wikipedia.org)
  • Rhodium is found in platinum or nickel ores together with the other members of the platinum group metals. (wikipedia.org)
  • Fortunately for the environmental activists, academics, politicians and those who produce and sell the platinum group metals the majority of the world's new rhodium, annually, can be, and is, produced as a byproduct of platinum mining in southern Africa. (resourceinvestor.com)
  • Palladium notched fresh records this week, but analysts warn that COVID-19's impact on the global economy warrants caution for traders looking to participate in the rally for the metal, or those eyeing prospects for sister metals rhodium and platinum. (marketwatch.com)
  • Other metals within the platinum group include platinum and rhodium. (marketwatch.com)
  • Rhodium prices of less than $1,000 [an ounce were] far too cheap for such a rare and useful commodity," says Hans-Guenter Ritter, global head of trading at Heraeus Precious Metals. (barrons.com)
  • Demand is going to stay strong," and if Fiat Chrysler continue to need more, "we will see $4,000 again in rhodium," says Peter Thomas, senior vice president at metals broker Zaner Metals. (barrons.com)
  • Zaner's Thomas suggests buying PAMP Suisse rhodium bars from a well-established precious-metals dealer. (barrons.com)
  • While the quantity of rhodium traded is by far the lowest among precious metals, market liquidity for that metal has seen a boost since 2008. (fxstreet.com)
  • Rhodium is a noble metal, resistant to corrosion, found in platinum- or nickel ores together with the other members of the platinum group metals. (survivalblog.com)
  • Rhodium, like all platinum group metals is inert and plays no biological role. (sciencemadness.org)
  • Rhodium can also be used to plate cheaper metals such as bronze, but as rhodium is so expensive, people only usually bother to get their most expensive pieces of jewelry coated in rhodium. (guyotbrothers.com)
  • Rhodium isn't malleable and in its purest form would simply break, which is why it is used as a plating to coat other metals. (guyotbrothers.com)
  • One of the rarest metals on earth (abundance of 2 x 10 4 ppm), rhodium does not appear naturally, tending to be found with other platinum group metals. (goodfellow.com)
  • There is no futures market for rhodium, but there are a few exchange-traded funds, including Xtrackers Physical Rhodium (XRHO.UK) and AfricaRhodium (ETFRHO.South Africa). (barrons.com)
  • Cast from rhodium-plated brass, this surprisingly lightweight pair is encrusted with scores of cubic zirconia that catch the light from every angle. (net-a-porter.com)
  • Rhodium has been known since 1803 and has long been used industrially for making vessels (alloyed with platinum) which can be raised to high temperatures, without becoming chemically reactive, in which very pure glass can be made. (resourceinvestor.com)
  • This is because no primary rhodium mine has yet been discovered on this planet, so that it must be produced as a byproduct. (resourceinvestor.com)
  • primary rhodium deposits in the world. (barrons.com)
  • D ETROIT () -- Rhodium is the rarest natural metal produced in significant quantities relative to its very low abundance. (resourceinvestor.com)
  • Rhodium saw a top near $4,000 in the early 1990s and it made a run north of $2,000 about 10 years later. (fxstreet.com)
  • I say "fortunately" because as I explained above platinum's use as a modifier of the emissions from internal combustion engines, is mandated by law by politicians acting at the behest of the above enumerated influence groups, and this keeps the demand for southern African platinum high enough to enable the production, as a byproduct, of more than half of the world's new rhodium each year. (resourceinvestor.com)
  • I want to get the latest chemistry news from C&EN in my inbox every week. (acs.org)
  • One of the world ' s leading specialty chemicals companies, Rhodia SA - the former chemicals and fibers & polymers units of Rh ô ne-Poulenc (now Aventis) spun off in 1998 - is repositioning itself for the 21st century. (encyclopedia.com)
  • Rhodia has enhanced its portfolio of hair and skin conditioning ingredients with the addition of two new polymers. (happi.com)
  • Duke University researchers have engineered rhodium nanoparticles (blue) that can harness the energy in ultraviolet light and use it to catalyze the conversion of carbon dioxide to methane, a key building block for many types of fuels. (nsf.gov)
  • Not only are the rhodium nanoparticles made more efficient when illuminated by light, they have the advantage of strongly favoring the formation of methane rather than an equal mix of methane and undesirable side-products like carbon monoxide. (nsf.gov)
  • At the same time, Rhodia has boosted its global reach with the acquisition of Albright & Wilson, a leading British chemicals group, which is expected to add some EUR 1.2 billion to the company ' s annual sales (which topped EUR 5.5 billion in 1999). (encyclopedia.com)
  • In this report, the United States Rhodium Carbon Catalyst market is valued at USD XX million in 2016 and is expected to reach USD XX million by the end of 2022, growing at a CAGR of XX% between 2016 and 2022. (mynewsdesk.com)
  • Gupta R. (2016) Spectral data of rhodium complex of porphyrin derivative C 87 H 72 N 5 Rh. (springer.com)
  • Spot prices for rhodium, meanwhile, have more than doubled from the end of last year to stand at $12,700 an ounce Friday, according to data from specialty-chemicals company Johnson Matthey . (marketwatch.com)
  • Specialty chemical producer Rhodia has completed its acquisition of the McIntyre Group Ltd after receiving regulatory authorizations. (cosmeticsandtoiletries.com)
  • Bio-based chemicals firm Cobalt Technologies and specialty chemical company Rhodia, member of the Solvay Group, said Wednesday that they will soon develop and build a bio-butanol demonstration facility in Brazil. (hydrocarbonprocessing.com)
  • Highly Efficient Rhodium-Catalyzed Asymmetric Ring-Opening Reactions of Oxabenzonorbornadiene with Amine Nucleophiles. (ebscohost.com)
  • Rhodium-catalyzed asymmetric ring-opening reactions of oxabenzonorbornadienes with aliphatic primary amines and substituted N-phenylpiperazines were investigated. (ebscohost.com)
  • Researchers at Tokyo Institute of Technology have reported a new catalyst composed of silica, a rhodium complex and tertiary amines 1 that significantly boosts hydrosilylation reactions. (titech.ac.jp)
  • If Rhodium is not malleable, I do not care how nice of the color it is, to me, is the "other Chrome" as far as I am concerned. (finishing.com)
  • for example, by the turn of the century, rhodium-containing thermocouples were used to measure temperatures up to 1800 °C. The first major application was electroplating for decorative uses and as corrosion-resistant coating. (wikipedia.org)
  • Rhodium can be combined with Platinum for high temperature crucibles and thermocouples. (halexandria.org)
  • Since 2000 Rhodia has been dismantling its sixth division, the Polyester division, as the company has begun a process of selling off its French and Brazilian polyester production facilities. (encyclopedia.com)
  • 1. A sulfur containing catalyst for the electroreduction of oxygen obtainable by sparging a solution of rhodium salt with hydrogen sulfide, recovering and drying the resulting product, grinding the resulting product, and subjecting the ground product to a thermal treatment between 300 and 800 C. (google.co.uk)
  • Reductive coupling of disulfides and diselenides with alkyl halides catalysed by a silica-supported phosphine rhodium complex using hydrogen as a reducing agent. (ebscohost.com)
  • The reductive coupling of disulfides and diselenides with alkyl halides was achieved in THF at 65 °C in the presence of 3 mol% of a silica-supported phosphine rhodium complex and triethylamine using hydrogen as a reducing agent, affording a variety of unsymmetrical sulfides and selenides in. (ebscohost.com)
  • After being washed with ethanol, the rose-red precipitate was reacted with zinc, which displaced the rhodium in the ionic compound and thereby released the rhodium as free metal. (wikipedia.org)
  • Appearance and odor vary depending upon the specific soluble rhodium compound. (cdc.gov)
  • Due to the high price of rhodium and its rarity, it's best to recycle rhodium instead of throwing it away. (sciencemadness.org)
  • Rhodium is a chemical element with symbol Rh and atomic number 45. (wikipedia.org)
  • Rhodium is sold by various chemical suppliers. (sciencemadness.org)
  • Eastman Chemical has a long term hydroformylation research program that has resulted in several successful low pressure rhodium catalyst technologies. (ebscohost.com)
  • To the best of our knowledge the chemical, physical and toxicological properties of rhodium oxide have not been thoroughly investigated and reported. (espimetals.com)
  • SwRI developed Rhodium through joint internal research with chemical engineers and computer scientists. (swri.org)
  • SEOUL, Korea - Rhodia announced the start of production for the company's Rhodiasolv RPDE solvent at the Yangsan, Korea, plant operated by DongAh Chemical Co. Ltd. The startup is the result of a partnership agreement signed by the companies in 2003. (pcimag.com)
  • OMEGA™ Exotic Thermocouple Probes are designed for use in extreme temperatures, up to 2315°C (4200°F). These probes utilize either Platinum/Rhodium (types R, S, or B) or Tungsten/Rhenium (types G, C, or D) elements, with a variety of insulations and sheath materials. (omega.com)
  • The richest deposits on earth from which rhodium is recovered are contained in southern Africa's Merensky Reef formation of nickel and copper sulphides. (resourceinvestor.com)
  • Super quality silver rhodium plated, nickel free & hypoallergenic will not tarnish! (ebay.ca)
  • 925 silver rhodium filled not tarnish, nickel free and hypoallergenic! (ebay.ca)
  • Antiferromagnetic order in uranium nickel(0.39) rhodium (0.61) aluminum. (unt.edu)
  • Rhodium acetylacetonate is the coordination complex with the formula Rh(O2C5H7)3, which is sometimes known as Rh(acac)3. (wikipedia.org)
  • Rhodia said the product offers a favorable toxicological and ecotoxicological profile, with low VOC potential and flexible formulating capabilities in combination with other solvents. (pcimag.com)
Fuchsia rhodium  Alloys
Fuchsia rhodium Alloys (repossi.com)
Precious metal based chemicals,platinum,gold,palladium,rhodium,ruthenium,iridium,gold,silver  catalysts and compounds from...
Precious metal based chemicals,platinum,gold,palladium,rhodium,ruthenium,iridium,gold,silver catalysts and compounds from... (tradekey.com)
Cognition #1 - Mirror, Mirror by Ken Reynolds - Kickstarter
Cognition #1 - Mirror, Mirror by Ken Reynolds - Kickstarter (kickstarter.com)
Most Valuable Substances By Weight - Business Insider
Most Valuable Substances By Weight - Business Insider (businessinsider.com)
Chemistry Group Directory
Chemistry Group Directory (columbia.edu)
April 14, 1849 - Scientific American
April 14, 1849 - Scientific American (scientificamerican.com)
Using spdf and noble gas notations, write electron | bartleby
Using spdf and noble gas notations, write electron | bartleby (bartleby.com)
Rhodium-Catalyzed Regioselective Carboacylation of Olefins: A C[BOND]C Bond Activation Approach for Accessing Fused-Ring...
Rhodium-Catalyzed Regioselective Carboacylation of Olefins: A C[BOND]C Bond Activation Approach for Accessing Fused-Ring... (onlinelibrary.wiley.com)
Lifelong Heart Pendant, White, Rhodium plated | Swarovski.com
Lifelong Heart Pendant, White, Rhodium plated | Swarovski.com (swarovski.com)
One Heart Ring, Red, Rhodium plated | Swarovski.com
One Heart Ring, Red, Rhodium plated | Swarovski.com (swarovski.com)
Tropical Flower Pendant, Pink, Rhodium plated | Swarovski.com
Tropical Flower Pendant, Pink, Rhodium plated | Swarovski.com (swarovski.com)
The Episodic Table of Elements | Listen to Podcasts On Demand Free | TuneIn
The Episodic Table of Elements | Listen to Podcasts On Demand Free | TuneIn (tunein.com)
Lifelong Heart Ring, White, Rhodium plated | Swarovski.com
Lifelong Heart Ring, White, Rhodium plated | Swarovski.com (swarovski.com)
Engineering News | Topics | Sponsored Content - China
Engineering News | Topics | Sponsored Content - China (engineeringnews.co.za)
Rhodium Nanorods | AMERICAN ELEMENTS ®
Rhodium Nanorods | AMERICAN ELEMENTS ® (americanelements.com)
Why analysts urge caution on palladium, platinum and rhodium - MarketWatch
Why analysts urge caution on palladium, platinum and rhodium - MarketWatch (marketwatch.com)
Theo Water Element Cufflinks, Blue, Rhodium Plated | Swarovski.com
Theo Water Element Cufflinks, Blue, Rhodium Plated | Swarovski.com (swarovski.com)
Attract Soul Heart Ring, White, Rhodium plated | Swarovski.com
Attract Soul Heart Ring, White, Rhodium plated | Swarovski.com (swarovski.com)
Tropical Flower Pierced Earrings, Pink, Rhodium plated | Swarovski.com
Tropical Flower Pierced Earrings, Pink, Rhodium plated | Swarovski.com (swarovski.com)
China sell bangle wholesale 🇨🇳 - Alibaba
China sell bangle wholesale 🇨🇳 - Alibaba (alibaba.com)
Edelweiss Pendant, Light multi-colored, Rhodium plated | Swarovski.com
Edelweiss Pendant, Light multi-colored, Rhodium plated | Swarovski.com (swarovski.com)
Lifelong Heart Pierced Earrings, White, Rhodium plated | Swarovski.com
Lifelong Heart Pierced Earrings, White, Rhodium plated | Swarovski.com (swarovski.com)
DSM MonoPhos™ | Sigma-Aldrich
DSM MonoPhos™ | Sigma-Aldrich (sigmaaldrich.com)
INTEROX® Hydrogen Peroxide Pico & PicoPlus | Solvay
INTEROX® Hydrogen Peroxide Pico & PicoPlus | Solvay (solvay.com)
Rhodium Chloride Solution | AMERICAN ELEMENTS ®
Rhodium Chloride Solution | AMERICAN ELEMENTS ® (americanelements.com)
Envirosuite - Mining Technology
Envirosuite - Mining Technology (mining-technology.com)
JSG Industrial Systems - Mining Technology
JSG Industrial Systems - Mining Technology (mining-technology.com)