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Topic: Gold synthesis

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Synthesis of noble metals

Gold

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	Encyclopedia: Gold (Site not responding. Last check: 2007-10-21)
		Gold is used in restorative dentistry especially in tooth restorations such as crowns and bridges.
		Gold is widely distributed in the Earth's crust at a background level of 0.03 g/1000 kg (0.03 ppm by weight).
		Economic gold extraction can be achieved from ore grades as little as 0.5 g/1000 kg (0.5 ppm) on average in large easily mined deposits, typical ore grades in open-pit mines are 1â“5 g/1000 kg (1-5 ppm), ore grades in underground or hard rock mines are usually at least 3 g/1000 kg (3 ppm) on average.
	www.nationmaster.com /encyclopedia/Gold (10572 words)

	Gold synthesis - Wikipedia, the free encyclopedia
		Since there is only one stable gold isotope, Au-197, nuclear reactions must create this isotope in order to produce gold.
		Gold synthesis in a particle accelerator is possible in many ways.
		Gold synthesis in nuclear reactors does not have an economic impact because of its low efficiency and high cost, although in the 50's a small quantity of gold was produced by irradiation of mercury in an atomic reactor for demonstration purposes in the United States.
	en.wikipedia.org /wiki/Gold_synthesis (349 words)

	An Artificial Synthesis Of Gold? You Be The Judge - Mark House
		The presence of gold was therefore very distinctly shown and a remarkable feature was that the metal obtained possessed the yellow bronze color of gold telluride and of native silver.
		The liquor when filtered and subjected to the reagents of gold showed the presence of this metal in the form of deposits3 which maybe estimated at 0.05 grains in all, which is very high considering the 6 grams of silver employed.
		With Formic Aldehyde, a brown precipitate of gold.
	www.levity.com /alchemy/markh_4.html (1833 words)

	NRL - MIME Chemical Vapor Microsensors
		The trivalent gold is reduced to neutral gold, and the gold atoms aggregate to form a particle nucleus.
		The relative rates of gold particle growth and alkanethiol surface complexation are dependent on the concentrations of the respective gold chloride and alkanethiol reagents.
		X:Y is the gold chloride:alkanethiol synthesis stoichiometric ratio that correlates with core size, and n is the number of carbon atoms in the alkanethiol chain that correlates with shell thickness.
	www.nrl.navy.mil /content.php?P=02REVIEW45-2 (613 words)

	Gold synthesis - Encyclopedia.WorldSearch (Site not responding. Last check: 2007-10-21)
		Synthesis and structural chemistry of AU(III)-substituted Bab2sYCub3sOb7s-[delta] (SuDoc NAS 1.15:103292)
		Synthesis of Au‚‚S and Au‚‚S‚ƒ using H‚‚S, short-chain and ring-structured sulfur as sulfur sources (U.S. Geological Survey open-file report)
		Synthesis of Aub2sS and Aub2sSb3 susing Hb2sS, short-chain and ring-structured sulfur as sulfur sources (SuDoc I 19.76:86-179)
	encyclopedia.worldsearch.com /gold_synthesis.htm (402 words)

	NDRL Radiation Chemistry Data Center -- Current Papers in Radiation and Photochemistry
		Synthesis and photoreaction of tricyclo[5.2.2.0(2,6)]undecanes having an alpha-methoxy beta,gamma-unsaturated carbonyl chromophore: A novel, efficient, and general route to linearly fused cis:anti:cis tricyclopentanoids.
		Photolabile linker for the solid-phase synthesis of base-sensitive oligonucleotides.
		Synthesis and characterization of soluble fluorescent poly(aryl ether ketone)s.
	www.rcdc.nd.edu /recent_papers/1997/bwl9736.htm (5042 words)

	Definition of Synthesis of noble metals
		The synthesis of noble metalls is only possible with methods of nuclear physics, either by nuclear reactors or by particle accelerators.
		Gold is not a result of nuclear fission.
		Methods of making gold in an artifical way are found under gold synthesis.
	www.wordiq.com /definition/Synthesis_of_noble_metals (387 words)

	Cross of gold speech (Site not responding. Last check: 2007-10-21)
		William Jennings Bryan delivered the Cross of gold speech at the convention of the Democratic Party of the United States on July 9 1896.
		Gold Cross Products and Services Australia The purpose of the Gold Cross company is to develop and promote to Guild members exclusive Guild products and merchandising services to help improve sales and profitability of pharmacy and raise revenue for the Guild.
		Speech Technologies (Apple) Apple�s Speech Recognition and Speech Synthesis Technologies now give speech-savvy applications the power to carry out your voice commands, and even speak back to you in plain English, and now, Spanish.
	www.serebella.com /encyclopedia/article-Cross_of_gold_speech.html (528 words)

	Molecular Scale Electronics. Syntheses and Testing
		First, we have completed the synthesis of the dodecyl-containing 16-mer on Merrifield's resin (chloromethyl polystyrene) using the iterative divergent/convergent approach; a method which significantly streamlines the preparation.
		The monomers needed for the polymer support synthesis were prepared as depicted in Scheme I.
		However, in the non-base-promoted adsorptions, higher concentrations of the thioacetyl groups, relative to that of thiol groups, are required to achieve monolayer coverage in a given interval.
	www.foresight.org /Conferences/MNT05/Papers/Tour/index.html (1992 words)

	THE SELF ASSEMBLY OF MICROSPHERES
		This experiment was an attempt to see if the gold sputtering had prevented the binding of ADH beads to the gold hemispheres, thus restricting binding to the 'non gold' region of the beads.
		As a result the gold should be immobilised as distinct patches or hemispheres; depending on the surface area of bead subjected to the gold beam.
		Gold sputtering having not proved useful in the previous experiments as a way of creating patches on the beads, the next tests were directed at trying to make shapes by controlling bead diameter.
	www.bath.ac.uk /~ensab/B_man/tr_51_97 (3445 words)

	Synthesis of highly oriented gold thin films by a UV-irradiation route (Site not responding. Last check: 2007-10-21)
		A synthetic route is presented for the preparation of a gold film in the presence of UV-radiation.
		Methoxypolyethylene glycol, a water-soluble polymer, was used as the reducing agent of gold ions in the presence of an ultra-violet source, and gold nanoparticles resulted.
		During stirring, a centrifugal force is generated at the center of the solution (at the point where the meniscus is at its lowest level with respect to the vertical orthogonal).
	www.edpsciences.org /articles/epjap/abs/2005/01/ap04058/ap04058.html (188 words)

	Dictionary of Meaning www.mauspfeil.net (Site not responding. Last check: 2007-10-21)
		'''Gold synthesis''' is the age-old dream of the alchemist alchemists, the artificial production of gold.
		In a nuclear reactor gold can be manufactured by irradiation of platinum or Mercury (element) mercury.
		Gold synthesis does not have an economic impact because of its low efficiency and high cost, although in the 1950s 50's a small quantity of gold was produced by irradiation of mercury in an atomic reactor for demonstration purposes in the United States of America USA.
	www.mauspfeil.net /gold_synthesis.html (370 words)

	NO Releasing Gold Nanoparticles: Synthesis and Characterization (Site not responding. Last check: 2007-10-21)
		Herein, we report on the synthesis and characterization of NO releasing-gold nanoparticles that are 2-3 nm in diameter.
		These nanoparticles consist of a gold core of ~140 atoms that is protected from aggregation by a monolayer of alkanethiol.
		Notably, the gold nanoparticles that do not contain diamines functionalities (controls) also release significant amounts of NO. While the exact mechanism of NO release from these nanoparticles has yet to be determined, it is hypothesized that a nitrosothiolate is being formed.
	acs.confex.com /acs/56serm/techprogram/P12333.HTM (275 words)

	index
		Sangaiah, R., Christova-Gueorguieva, N.I., Ranasinghe, A., Tretyakova, N.Y., Gold, A., Ball, L.M. and Swenberg, J.A.: Synthesis of perdeuterated analogues of the epoxide metabolites of butadiene: 1,2-epoxybut-3-ene-d6 and 1,2,3,4-diepoxybutane-d6.
		Gold, A., Jayaraj, K., Ball, L.M. and Brust, K.: Oxidation of polyaromatic hydrocarbons by an oxoferryl porphyrin p-cation radical.
		Jayaraj, K., Gold, A., Sangaiah, R., Georgieva, N., Koc, H., Klapper, D.G., Ball, L.M., Reddy, A.P. and Swenberg, J.A.: Synthesis and characterization of peptides containing a cyclic valine adduct of diepoxybutane, a possible biomarker of human exposure to butadiene.
	www.unc.edu /%7Elmball (1408 words)

	NDSU: Department of Physics - Seminar Abstracts (Site not responding. Last check: 2007-10-21)
		Gold nanoparticles are among one of the most extensively studied nanoparticle materials due to their unique size-dependent properties at nanometer scale.
		In order to assemble gold nanoparticles into desired devices and material structures through a chemical approach, gold nanoparticles often need to be modified with surface functional groups.
		With a controlled number of surface functional groups, these gold nanoparticles can be treated as individual molecules and nanoparticle devices may be developed through synthetic chemistry approaches.
	www.physics.ndsu.nodak.edu /seminars/abstracts/huo_100902.htm (221 words)

	Gold Nanoparticle Synthesis (Site not responding. Last check: 2007-10-21)
		Gold nanoparticles stabilized by thiol functionality are extraordinarily stable and therefore are a great system for studying nanostructure formation.
		Because gold nanoparticles are so easy to synthesize they have been studied intensely in recent years.
		A common synthesis involves the reduction of a gold salt in the presence of capping agent molecules such as thiols, citrates or phosphines.
	braungroup.beckman.uiuc.edu /GoldNanop.html (156 words)

	smartbahu.com - Synthesis of anti-cancer vaccines based on novel gold nanoparticles (Site not responding. Last check: 2007-10-21)
		The team reports (1) (in Tetrahedron: Asymmetry) the successful synthesis of gold nanoparticles featuring covalently bonded, immunogenic oligosaccharides from the Ley determinant, which is associated with various carcinomas including colon, liver, prostate and ovarian.
		In this way a high surface density of the antigens is presented on the shell of the gold nanoparticles.
		The Midatech gold glyconanoparticles can be synthesized with specific carbohydrate and peptide moieties corresponding to well-characterised antigens from other cancer associated determinants, and we hope that this ingenious technology will lead to the creation of a range of novel, highly active anti-cancer vaccines in the future.
	www.smartbahu.com /article437058.html (429 words)

	Journal of Materials Research 19(10) October 2004 (Site not responding. Last check: 2007-10-21)
		In this paper, we present a study on the formation of gold colloids by laser ablation of a gold metal target in alkanes and thiol-alkane solutions.
		The results show a decrease of the gold particles' size up to 2 nm when thiol molecules are present in the liquid environment.
		The observation of a blue-shift of the surface plasmon resonance is discussed together with TEM analyses accounting the cluster size decrease and the stabilization of the obtained suspensions.
	www.mrs.org /publications/jmr/jmra/2004/oct/002.html (130 words)

	The Modern Alchemist
		This fantastic piece of alchemical literature is full of strange, hard to find information on the subjects of chemistry, science, gold alchemy, transmutation, and mineral synthesis.
		Mercury (80) + 1 neutron = Gold (79) + 1 alpha particle (which is released on impact).
		This is another excerpt from the chapter titled: "Gold Magnet"
	members.tripod.com /%7Ealchemist7 (407 words)

	index
		Sangaiah, A. Gold, K.O. Newcomb and L.M. Ball, "Synthesis and Biological Activity of Bay Region Metabolites of a Cyclopenta-fused Polymer Aromatic Hydrocarbon: Benz[j]aceanthrylene", J. Med.
		K.O. Newcomb, R. Sangaiah, A. Gold and L.M. Ball, "Activation and Metabolism of Benz[j]aceanthrylene-9,10-dihydrodiol, the Precursor to Bay-Region Metabolism of the Genotoxic Cyclopenta-PAH Benz[j]aceanthrylene", Mutation Res.
		Gold, R. Sangaiah, C.J. Inhof, J. Zhang and L.M. Ball, "Metabolic Fate of the Environmental Mutagen 3-Nitrofluoranthene in the Rat", Polycyclic Aromatic Compounds, Polycyclic Aromatic Compounds 10, 19 (1996).
	www.unc.edu /~golda (961 words)

	Allakhazam.com: Final Fantasy XI
		Gold ingots sell at a loss if you use gold beastcoins and break even if you use ore (loss again with nuggets) on my server.
		Gold Ingots, also, like Cutculain described, will be crafted at a loss of at best 3k per synth and at worst 33k.
		The gold buckler seems to be one of the chepest synths at this level.
	ffxi.allakhazam.com /forum.html?forum=24&mid=1094587932663952017 (8470 words)

	R. Kumar: Fungus Mediated Intra- and Extra-Cellular Synthesis of Gold Nanoparticles (Site not responding. Last check: 2007-10-21)
		Development of green chemistry protocols for the synthesis of inorganic nanoparticles is a problem of topical interest in nanotechnology.
		In this paper, we report on the development of a new biological method for the synthesis of gold nanoparticles using fungi.
		The gold nanoparticles exhibit tolerable monodispersity (size in the range 5-20 nm) and in the case of particles synthesized extra-cellularly, excellent long term stability as well.
	www.chemie.uni-marburg.de /~nanobio2/Kumar-abs.html (196 words)

	Nanocolloidal Gold (Site not responding. Last check: 2007-10-21)
		Remove a 0.5-mL aliquot from your gold nanoparticle solution (use the one made using sodium citrate).
		The diffuse double layer surrounding the charged gold particles contracts considerably with increasing ionic strength.
		Explain the difference between the UV-Vis spectra of the gold nanocolloids made using the different methods.
	www.chem.wisc.edu /courses/801/Spring00/labs/auexp.html (332 words)

	Griffith Chemistry - Healy Research (Site not responding. Last check: 2007-10-21)
		As a result, we became interested in developing methods of preparing complexes in high purity without the use of anion and ligand exchange methods where possible.
		]- is utilized as the most common source of gold for the synthesis of gold(I) complexes, necessitating both reduction and anion exchange steps.
		These salts however, are readily reduced to gold (I) salts by a range of reducing agents, the most convenient being ketones:
	chem.sci.gu.edu.au /research/healysynth.html (381 words)

	1. Zsigmondy Kolloquium - Mainz - Home (Site not responding. Last check: 2007-10-21)
		In this contribution, a method for the surface modification of citrate reduced gold nanoparticles and a new route of synthesis of monolayer protected gold nanoparticles and gold nanowires will be presented.
		Firstly, a strategy for surface modification of citrate reduced gold nanoparticles with 2-mercaptosuccinic acid is established and a number of comparative tests were conducted in order to investigate the surface structure of the particles and their properties.
		Secondly a new route for the synthesis of monolayer protected gold nanoparticles was developed.
	www.mpip-mainz.mpg.de /zc04/de/abstract_show.php?show=36 (269 words)

	Custom Synthesis Suggestions
		Please be advised also that new syntheses frequently require much more work than anticipated, and if a similar procedure has not been demonstrated before, may be better handled as a contract research project or collaboration.
		Because the gold cluster labels developed by Nanoprobes, Incorporated are attached by covalent cross-linking, they may be used to label almost any molecule with a suitably reactive functionality.
		We need the molecular weight to calculate how much gold labeling reeagent we will need, how much of the probe we will need to use for labeling, and also which product isolation protocol to use.
	www.nanoprobes.com /Custom.html (583 words)

	Gold Chloride - More Information (Site not responding. Last check: 2007-10-21)
		Our Gold Chloride is shipped in dark glass shrink wrapped top bottles.
		Gold Ions (Ag) are purified to a minimum of 99.95%.
		The Purified Gold Ions are then diluted to 1% Gold with De-Ionized water.
	www.saltlakemetals.com /MoreInfoGoldChloride.htm (65 words)

	The Adrenaline Vault \| Hardware Review \| Creative Labs Sound Blaster AWE64 Gold (Site not responding. Last check: 2007-10-21)
		The AWE64 Gold is positioned towards the high-end users who want greatquality sound without compromising compatibility.
		Acquiring Emu systems has put them on the right track, withthe introduction of wave table synthesis to the PC via the Wave Blaster, andthen on to the EMU8000 Advanced WavEffects synthesizer in the AWE32 and SB32.Now, with the help of Seer Technologies, we have WaveGuide Synthesis, orWaveSynth/WG as found in the AWE64 cards.
		Looking at the Sound Blaster AWE64 Gold and its specs shows thatCreative Labs means business; gold plated RCA line outputs are used(versus the 1/8" jacks used in previous models), and a 20-bit S/PDIF(Sony/Phillips Digital InterFace) digital output jack is also available.The signal-to-noise ratio is rated at 85 - 90 dB.
	www.adrenalinevault.com /hardware/getreview.asp?review=sbawe64gold (522 words)

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