Letteratura scientifica selezionata sul tema "Gold"
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Articoli di riviste sul tema "Gold"
Buklioska Ilievska, Daniela, Marjan Baloski, Jane Bushev, Jordan Minov, Ivana Mickovski, Irena Gigovska Dimova, Natasha Eftimovska Otovikj e Radmila Milosheska. "Metabolic syndrome (mets) as one of the major comorbidities of chronic obstructive pulmonary disease (copd)". Respiratio 13, n. 1-2 (31 agosto 2023): 45–56. http://dx.doi.org/10.26601/rsp.aprs.23.4.
Testo completoBischoff, Günther C. O. "Gold-adsorbing bacteria as colonisers on alluvial placer gold". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 194, n. 2-3 (21 dicembre 1994): 187–209. http://dx.doi.org/10.1127/njgpa/194/1994/187.
Testo completoLandon, Preston B., Alexander H. Mo, Chen Zhang, Chris D. Emerson, Adam D. Printz, Alan F. Gomez, Christopher J. DeLaTorre et al. "Designing Hollow Nano Gold Golf Balls". ACS Applied Materials & Interfaces 6, n. 13 (26 giugno 2014): 9937–41. http://dx.doi.org/10.1021/am502519x.
Testo completoPatteson, Patricia H., e Gerald D. Swick. "Black Gold, Fool's Gold". Appalachian Heritage 30, n. 2 (2002): 62–72. http://dx.doi.org/10.1353/aph.2002.0101.
Testo completoV, Radhamani, Manju D, Bobby Prathikshana M, Javagar M, Nivetha V e Rinubha P. "Respected Author, Your research paper has been published successfully. Please find the link below. http://ymerdigital.com/archives/?cpage=6&issId=%202106 Please find the below DOI allocated to your article. 10.37896/YMER21.07/13 OR https://www.doi.org/10.37896/YMER21.07/13 Please find the below attached E- certificates Thanks." YMER Digital 21, n. 07 (7 luglio 2022): 183–92. http://dx.doi.org/10.37896/ymer21.07/14.
Testo completoMarshall, Michael. "New form of gold is more gold than gold". New Scientist 239, n. 3185 (luglio 2018): 16. http://dx.doi.org/10.1016/s0262-4079(18)31194-1.
Testo completoMurali Mohan, BV. "GOLD Guidelines 2017: as good as gold1". APIK Journal of Internal Medicine 5, n. 2 (2017): 57. http://dx.doi.org/10.4103/2666-1802.258908.
Testo completoK.S.Nemavathi, K. S. Nemavathi, e Dr V. R. Nedunchezhian Dr. V.R Nedunchezhian. "A Study on Impact of Price Behaviour of Commodity Gold and Gold ETF". International Journal of Scientific Research 2, n. 8 (1 giugno 2012): 240–41. http://dx.doi.org/10.15373/22778179/aug2013/80.
Testo completoKittleson, Michelle M., e Sonia Garg. "Solid Gold, or Liquid Gold?" Circulation 143, n. 12 (23 marzo 2021): 1198–201. http://dx.doi.org/10.1161/circulationaha.120.052925.
Testo completoMedina, J. "Mat Gold—Gold Foil Restoration". Operative Dentistry 33, n. 3 (1 gennaio 2008): 239–45. http://dx.doi.org/10.2341/08-gf.
Testo completoTesi sul tema "Gold"
Coetzee, Karolien. "Gold complexes obtained from gold ylide preparations". Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/21206.
Testo completoENGLISH ABSTRACT: This investigation comprised the synthesis and characterisation of new Au(I) phosphonium ylide complexes and other compounds formed during coordination reactions. These complexes could exploit the synergism between two pharmacologically active substances (gold complex unit and phosphorus ylide) to furnish an even more active substance. Four phosphonium salts were prepared, [C6H5CH2PPh3]Br (1), [Ph3P(CH2)3PPh3]Br2 (2a), p-[{Ph3PCH2}2C6H4]Br2 (3a) and m- [{Ph3PCH2}2C6H4]Br2 (4a), by reacting PPh3 with the corresponding alkylbromides. The 13C and 1H NMR spectra of the compounds 1 – 4a indicated that many of the nuclei are magnetically inequivalent. The aromatic units in PPh3 are normally identical, but multiple, overlapping signals proved that the corresponding ortho, meta and para carbon and proton nuclei are in magnetically different environments from each other. Single crystal structures of salts 3a and 4a were determined. Different methods were followed to deprotonate the phosphonium salts to afford the corresponding ylides and to coordinate the ylides to gold precursor compounds. Most of the reactions yielded inseparable mixtures of products and pure compounds could not be isolated in large enough quantities for characterisation by all physical methods. Sufficient crystals for structure determination by X-ray diffraction were obtained. The product mixtures were characterised by 1H, 13C and 31P NMR spectroscopy and mass spectrometry. Characteristic downfield chemical shift changes after coordination of the ylides to Au(I) were observed for the carbon and phosphorus nuclei, while the protons displayed upfield shifts. Reaction of (C6F5)Au(tht) with the salts 1 – 4a, and subsequent deprotonation yielded the gold(I) ylide complexes [C6H5CH(AuC6F5)PPh3] (5), [{Ph3PCH(AuC6F5)}2CH2] (6), p-[{Ph3PCH(AuC6F5)}2C6H4] (8), and m- [{Ph3PCH(AuC6F5)}2C6H4] (9). The crystal and molecular structures of compounds 5 and 9 were determined. Deprotonation of 4a with n-BuLi, followed by reaction with (C6F5)Au(tht) yielded complexes 9 and [{Ph3PCH2}2C6H4][BrAuC6F5]2 (10). The crystal structure of compound 10 was determined. Two aurocyclic compounds, [μ- {(Ph3PCH)2CH2}2Au2][BF4]2 (12) and [μ–{(Ph3PCH)2C6H4}2Au2][BF4]2 (13) were synthesised by deprotonating salts 2b and 3b with n-BuLi and subsequently reacting the corresponding bisylides with ClAu(tht). Reaction procedures in which Ag2O was used as deprotonating agent for the phosphonium salts 2a, 3a and 4a, yielded mixtures of products. Single crystals of complexes m-[Ph3PCH(AuC6F5)C6H4CH3] (14), [C6F5Au(tht)] (15) and [(C6F5)2Au][(Ph3PCH2)2C6H4] (16) were isolated from the reaction mixtures and subjected to X-ray crystal structure determination. The molecular structure of 15 exhibited unusual aurophilic interactions and represents the first example of a linear gold chain in which the gold···gold distances systematically alternate between 3.13Å, 3.31Å and 3.20Å. Salt 2b was reacted with Ph3PAu(acac) to afford the desired compound, [{Ph3PCH(AuPPh3)}2CH2](BF4)2 (19), along with [CH3C(O)C(AuPPh3)2C(O)CH3] (17) and some byproducts. Compound 17 was characterised by single crystal Xray diffraction. The fluorobiphenylgold(I) complexes, 4,4’-[(AuPPh3)2C12F8] (21) and 2,2’- [(AuPPh3)2C12F8] (22) were synthesised by reaction of ClAuPPh3 with the lithiated 2,2’-dibromooctafluorobiphenyl and 4,4’-dibromooctafluorobiphenyl respectively. The molecular structure of 21 revealed that one of the C–Au–P bond angles deviates from linearity by 12.5°, probably as a result of π-stacking of the tetrafluorophenyl rings and steric requirements of the bulky PPh3 units. The other C–Au–P bond angle is linear [177.9(3)°].
AFRIKAANSE OPSOMMING: Hierdie studie behels die sintese en karakterisering van nuwe fosfoniumylied goud(I)-komplekse en ander verbindings wat gedurende koördinasiereaksies vorm. Sulke komplekse kan sinergisme tussen twee farmakologies-aktiewe entiteite (goud(I) en fosfoniumylied) om ʼn meer aktiewe verbinding te vorm meebring. Vier fosfoniumsoute is berei, [C6H5CH2PPh3]Br (1), [Ph3P(CH2)3PPh3]Br2 (2a), p- [{Ph3PCH2}2C6H4]Br2 (3a) en m-[{Ph3PCH2}2C6H4]Br2 (4a), deur PPh3 met die ooreenstemmende alkielbromiedes te reageer. Die 13C- en 1H- KMR-spektra van dié verbindings toon dat ʼn aantal kerne in aromatiese ringe magneties onekwivalent is. Normaalweg is die koolstowwe in PPh3-eenhede ekwivalent, maar meervoudige, oorvleuelende pieke het nou getoon dat die ooreenstemmende orto-, meta- en para-koolstof sowel as die ooreenstemmende protonkerne in verskillende magnetiese omgewings voorkom. Die kristalstrukture van die soute 3a en 4a hierbo is met behulp van X-straal tegnieke bepaal. Verskillende metodes is gevolg om die fosfoniumsoute te deprotoneer na die ooreenstemmende yliede en om die yliede dan aan goud-bevattende uitgangstowwe te probeer koördineer. Die meeste reaksies het nie-skeibare mengsels gevorm en enkelprodukte kon nie in groot genoeg konsentrasies geïsoleer word om hulle afsonderlik te karakteriseer nie. Kristalle vir X-straal kristalstruktuur bepalings is verkry. Die produkmengsels is gekarakteriseer met behulp van 1H-, 13C- en 31P- KMR-spektroskopie en massaspektrometrie. Karakteristieke veranderinge in chemiese verskuiwings na laer veldsterktes vir die koolstof en fosfor kerne is waargeneem na koördinasie van die yliede aan Au(I), terwyl die protone na höer veldsterktes verskuif het. Die reaksie tussen (C6F5)Au(tht) (tetrahidrotiofeen) en soute 1 – 4a gevolg deur deprotonering, vorm die goud-yliedkomplekse [C6H5CH(AuC6F5)PPh3] (5), [{Ph3PCH(AuC6F5)}2CH2] (6), p-[{Ph3PCH(AuC6F5)}2C6H4] (8), en m- [{Ph3PCH(AuC6F5)}2C6H4] (9). Die kristalstrukture van komplekse 5 en 9 het al die molekulêre interaksies daarin blootgelê. Deprotonering van 4a met n-BuLi, gevolg deur reaksie met (C6F5)Au(tht) lewer komplekse 9 en [{Ph3PCH2}2C6H4][BrAuC6F5]2 (10). Die kristal- en molekulêre struktuuur van kompleks 10 is bepaal. Twee aurosikliese verbindings, [μ- {(Ph3PCH)2CH2}2Au2][BF4]2 (12) en [μ–{(Ph3PCH)2C6H4}2Au2][BF4]2 (13) is gesintetiseer deur gedeprotoneerde bisyliede verkry van 2b en 3b met substitusie van tht aan die ClAu-eenheid te koördineer. Reaksieprosedures waarin Ag2O vir deprotonering van die fosfoniumsoute 2a, 3a en 4a gebruik is, het tot mengsels van produkte aanleiding gegee. Enkelkristalle van komplekse [Ph3PCH(AuC6F5)C6H4CH3] (14), [C6F5Au(tht)] (15) en [(C6F5)2Au][(Ph3PCH2)2C6H4] (16) is geïsoleer uit die reaksies en kristalstruktuurbepalings is uitgevoer. Die molekulere struktuur van 15 toon ongewone aurofiliese interaksies en verteenwoordig die eerste voorbeeld van ʼn linieêre goudketting; met goud···goud afstande wat sistematies varieër tussen 3.13Å, 3.31Å en 3.20Å. Sout 2b is met Ph3PAu(acac) gereageer om die gewenste produk, [{Ph3PCH(AuPPh3)}2CH2](BF4)2 (19), saam met [CH3C(O)C(AuPPh3)2C(O)CH3] (17) en ander byprodukte te vorm. Verbinding 17 is as enkelkristalle Xstraalkristallografies gekarakteriseer. Die fluorobifeniel goud(I)-komplekse, 4,4’-[(AuPPh3)2C12F8] (21) en 2,2’- [(AuPPh3)2C12F8] (22), is gesintetiseer deur koördinasie van AuPPh3 aan die gelitieërde 2,2’-dibromooktafluorobifeniel en 4,4’-dibromooktafluorobifeniel respektiewelik. Die molekulere struktuur van 21 het getoon dat een van die C-Au- P bindingshoeke met 12.5º afwyk van 180º, waarskynlik as gevolg van π- interaksie van die tetrafluorofenielringe en die steriese vereistes van die groot PPh3-eenhede. Die ander C-Au-P bindingshoek is linieêr [177.9(3)°].
Mulley, Melinda Ann. "We hear nothing but gold, gold, gold : women and poverty in South Australia during the gold rushes 1850-1855 /". Title page, table of contents and introduction only, 2004. http://web4.library.adelaide.edu.au/theses/09AR/09arm9589.pdf.
Testo completoWetzel, Mary S. "Sodek's Gold". Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc500390/.
Testo completoCotten, Nicole. "Fool's gold". Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6086.
Testo completoWarm, Julie J. Day Nancy E. "From good to gold: predicting nonprofit engagement in entrepreneurial activity /". Diss., UMK access, 2004.
Cerca il testo completo"A dissertation in public affairs and administration and education." Advisor: Nancy Day. Typescript. Vita. Title from "catalog record" of the print edition Description based on contents viewed Feb. 28, 2006. Includes bibliographical references (leaves 107-113). Online version of the print edition.
Gottfried, Jörg Michael. "CO oxidation over gold adsorption and reaction of oxygen, carbon monoxide, and carbon dioxide on an Au(110)-(1x2) surface /". [S.l. : s.n.], 2003. http://www.diss.fu-berlin.de/2003/133/index.html.
Testo completoSkelton, Helen Elisabeth. "Gold and gold-based nanoparticles for NOx reduction catalysis". Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610182.
Testo completoYang, Yi. "Gold(I) oxo, imido, hydrazido complexes and gold clusters /". free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9841362.
Testo completoBartlett, Samuel Andrew. "God, Gold, or Glory: Norman Piety and the First Crusade". UNF Digital Commons, 2008. http://digitalcommons.unf.edu/etd/119.
Testo completoJennings, Nicola. "Laser deposition of metallic gold using gold(I)-carbene complexes". Thesis, Keele University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436197.
Testo completoLibri sul tema "Gold"
Liu, Jean Moon. Gold mountain, gold nuggets, gold dust, gold coins. [Berkeley? Calif.]: J.M. Liu, 1988.
Cerca il testo completoLiu, Jean Moon. Gold mountain, gold nuggets, gold dust, gold coins. [Calif.?: s.n.], 2003.
Cerca il testo completoPower of gold, golds of power: Yapı Kredi gold coin collection. Istanbul]: Yapi Kredi Yayinlari, 2004.
Cerca il testo completoCunningham, Chet. Gold Ledge Gold Diggers. New York, USA: Leisure Books, 1994.
Cerca il testo completoSpinnanger, Ruthe T. More gold than gold. Fergus Falls, Minn: Faith and Fellowship Press, 1992.
Cerca il testo completoBruce, Moore. Gold! Gold! Gold!: A dictionary of the nineteenth-century Australian gold rushes. South Melbourne: Oxford University Press, 2000.
Cerca il testo completoPetralia, J. F. Gold! gold!: Beginners handbook : how to prospect for gold. San Francisco, CA: Sierra Trading Post, 1991.
Cerca il testo completoPetralia, J. F. Gold! gold!: Beginners handbook : how to prospect for gold! San Francisco, CA: Sierra Outdoor Products, 1991.
Cerca il testo completoStephen, Marchesi, e Steck-Vaughn Company, a cura di. Gold mountain: California gold rush. Austin, Tex: Steck-Vaughn, 2003.
Cerca il testo completo(Firm), Hordern House. Gold: The Australian gold rushes. Sydney: Hordern House, 1990.
Cerca il testo completoCapitoli di libri sul tema "Gold"
Annas, George J. "Good as Gold". In Judging Medicine, 325–33. Totowa, NJ: Humana Press, 1988. http://dx.doi.org/10.1007/978-1-4612-4592-6_49.
Testo completoSeed, David. "Good as Gold". In The Fiction of Joseph Heller: Againts the Grain, 129–57. London: Palgrave Macmillan UK, 1989. http://dx.doi.org/10.1007/978-1-349-20007-8_6.
Testo completoJacobs, Jason. "God and Gold". In Deadwood, 104–24. London: British Film Institute, 2012. http://dx.doi.org/10.1007/978-1-349-92521-6_6.
Testo completoMalieckal, Bindu. "As Good as Gold". In The English Renaissance, Orientalism, and the Idea of Asia, 131–59. New York: Palgrave Macmillan US, 2009. http://dx.doi.org/10.1057/9780230106222_7.
Testo completoCastroviejo, Ricardo. "Gold (Au, Native Gold)". In A Practical Guide to Ore Microscopy—Volume 1, 325–30. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-12654-3_56.
Testo completoKurtz, Wolfgang, e Hans Vanecek. "Gold". In W Tungsten, 259–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-662-08690-2_28.
Testo completoVasiliu, Monica, e David A. Dixon. "Gold". In Encyclopedia of Earth Sciences Series, 1–2. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-39193-9_28-1.
Testo completoVasiliu, Monica, e David A. Dixon. "Gold". In Encyclopedia of Earth Sciences Series, 622–23. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-39312-4_28.
Testo completoCrowson, Phillip. "Gold". In Minerals Handbook 1992–93, 100–106. London: Palgrave Macmillan UK, 1992. http://dx.doi.org/10.1007/978-1-349-12564-7_16.
Testo completoHummel, Rolf E. "Gold". In Understanding Materials Science, 350–54. New York, NY: Springer New York, 1998. http://dx.doi.org/10.1007/978-1-4757-2972-6_17.
Testo completoAtti di convegni sul tema "Gold"
Borgeat, Louis, Guy Godin, François Blais, Philippe Massicotte e Christian Lahanier. "GoLD". In ACM SIGGRAPH 2005 Papers. New York, New York, USA: ACM Press, 2005. http://dx.doi.org/10.1145/1186822.1073276.
Testo completoPerry, Scott S., Ian Laboriante e Xiaoping Yan. "Vapor Phase Lubrication of Gold/Gold Interfaces". In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63773.
Testo completo"Gold sponser". In 2013 20th Iranian Conference on Biomedical Engineering (ICBME). IEEE, 2013. http://dx.doi.org/10.1109/icbme.2013.6782181.
Testo completo"Gold Rambus". In 2011 IEEE 20th Conference on Electrical Performance of Electronic Packaging and Systems (EPEPS). IEEE, 2011. http://dx.doi.org/10.1109/epeps.2011.6100163.
Testo completoTan, Zhangxi, Andrew Waterman, Rimas Avizienis, Yunsup Lee, Henry Cook, David Patterson e Krste Asanović. "RAMP gold". In the 47th Design Automation Conference. New York, New York, USA: ACM Press, 2010. http://dx.doi.org/10.1145/1837274.1837390.
Testo completo"Gold sponsor". In 2008 IEEE Hot Chips 20 Symposium (HCS). IEEE, 2008. http://dx.doi.org/10.1109/hotchips.2008.7476529.
Testo completo"Gold Donors". In 2022 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR). IEEE, 2022. http://dx.doi.org/10.1109/cvpr52688.2022.00009.
Testo completo"GOLD event". In 2013 IEEE 17th International Symposium on Consumer Electronics (ISCE). IEEE, 2013. http://dx.doi.org/10.1109/isce.2013.6570118.
Testo completo"Gold sponsor". In 2014 IEEE Fourth International Conference on Consumer Electronics – Berlin (ICCE-Berlin). IEEE, 2014. http://dx.doi.org/10.1109/icce-berlin.2014.7034200.
Testo completo"Gold Sponsors". In 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018). IEEE, 2018. http://dx.doi.org/10.1109/cpem.2018.8500832.
Testo completoRapporti di organizzazioni sul tema "Gold"
Gosselin, P., e B. Dubé. Gold deposits and gold districts of Canada. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2005. http://dx.doi.org/10.4095/220378.
Testo completoPoulsen, K. H. Lode gold. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1995. http://dx.doi.org/10.4095/207998.
Testo completoDawson, K. M. Skarn gold. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1995. http://dx.doi.org/10.4095/208020.
Testo completoFyon, A. Lode Gold. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/132300.
Testo completoBarro, Robert, e Sanjay Misra. Gold Returns. Cambridge, MA: National Bureau of Economic Research, febbraio 2013. http://dx.doi.org/10.3386/w18759.
Testo completoGosselin, P., e B. Dubé. Gold deposits and gold districts of the world. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2005. http://dx.doi.org/10.4095/220377.
Testo completoBordo, Michael, John Landon Lane e Angela Redish. Good versus Bad Deflation: Lessons from the Gold Standard Era. Cambridge, MA: National Bureau of Economic Research, febbraio 2004. http://dx.doi.org/10.3386/w10329.
Testo completoBordo, Michael. The Gold Standard as a `Good Housekeeping Seal of Approval'. Cambridge, MA: National Bureau of Economic Research, novembre 1995. http://dx.doi.org/10.3386/w5340.
Testo completoRoscoe, S. M. Paleoplacer uranium, gold. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1995. http://dx.doi.org/10.4095/207948.
Testo completoMcLeod, C. R., e S. R. Morison. Placer gold, platinum. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1995. http://dx.doi.org/10.4095/207950.
Testo completo