Search Results - "Richard R. Hark"

Laser‐Induced Breakdown Spectroscopy—An Emerging Analytical Tool for Mineral Exploration by Russell S. Harmon, Christopher J.M. Lawley, Jordan Watts, Cassady L. Harraden, Andrew M. Somers, Richard R. Hark

“…The mineral exploration industry requires new methods and tools to address the challenges of declining mineral reserves and increasing discovery costs…”
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Raman microscopy and x-ray fluorescence analysis of pigments on medieval and Renaissance Italian manuscript cuttings by Burgio, Lucia, Clark, Robin J.H, Hark, Richard R

“…Italian medieval and Renaissance manuscript cuttings and miniatures from the Victoria and Albert Museum were analyzed by Raman microscopy to compile a database…”
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Analysis of Garnet by Laser-Induced Breakdown Spectroscopy—Two Practical Applications by Peter A. Defnet, Michael A. Wise, Russell S. Harmon, Richard R. Hark, Keith Hilferding

“…Laser-induced breakdown spectroscopy (LIBS) is a simple and straightforward technique of atomic emission spectroscopy that can provide multi-element detection…”
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Connecting Obsidian Artifacts with Their Sources Using Multivariate Statistical Analysis of LIBS Spectral Signatures by Russell S. Harmon, Chandra S. Throckmorton, Greg Haverstock, Dirk Baron, Robert M. Yohe, Richard R. Hark, Jeffrey R. Knott

“…With the recent introduction of handheld instruments for field use, laser-induced breakdown spectroscopy (LIBS) is emerging as a practical technology for…”
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Field-portable and handheld laser-induced breakdown spectroscopy: Historical review, current status and future prospects by Senesi, Giorgio S., Harmon, Russell S., Hark, Richard R.

“…The first part of this review describes laser-induced breakdown spectroscopy (LIBS) instrumentation for in situ measurement outside the laboratory, both…”
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Applications of laser-induced breakdown spectroscopy for geochemical and environmental analysis: A comprehensive review by Harmon, Russell S., Russo, Richard E., Hark, Richard R.

“…Applications of laser-induced breakdown spectroscopy (LIBS) have been growing rapidly and continue to be extended to a broad range of materials. This paper…”
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Geochemical Fingerprinting by Handheld Laser‐Induced Breakdown Spectroscopy by Harmon, Russell S., Hark, Richard R., Throckmorton, Chandra S., Rankey, Eugene C., Wise, Michael A., Somers, Andrew M., Collins, Leslie M.

“…A broad suite of geological materials was studied a using a handheld laser‐induced breakdown spectroscopy (LIBS) instrument. Because LIBS is simultaneously…”
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Can the provenance of the conflict minerals columbite and tantalite be ascertained by laser-induced breakdown spectroscopy? by Harmon, Russell S., Shughrue, Katrina M., Remus, Jeremiah J., Wise, Michael A., East, Lucille J., Hark, Richard R.

“…Conflict minerals is a term applied to ores mined in conditions of armed conflict and human rights abuse. Niobium and tantalum are two rare metals whose…”
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Multianalyzer Spectroscopic Data Fusion for Soil Characterization by Hark, Richard R., Throckmorton, Chandra S., Harmon, Russell S., Plumer, John R., Harmon, Karen A., Harrison, J. Bruce, Hendrickx, Jan M. H., Clausen, Jay L.

“…The ability to rapidly conduct in-situ chemical analysis of multiple samples of soil and other geological materials in the field offers many advantages over a…”
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Spectroscopic investigation of modern pigments on purportedly medieval miniatures by the 'Spanish Forger' by Burgio, Lucia, Clark, Robin J. H., Hark, Richard R.

“…Five miniatures by the so‐called ‘Spanish Forger’ were acquired by the Victoria and Albert Museum in 2008. Believed to be authentic medieval miniatures until…”
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Spectroscopy study of mural paintings from the Pyrenean Church of Saint Eulàlia of Unha by Clark, Robin J. H., Hark, Richard R., Salvadó, Nati, Butí, Salvador, Pradell, Trinitat

“…A series of wall paintings dating from the Romanesque period to the 16th century were uncovered during restoration projects at the church of Santa Eulàlia of…”
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Advanced signal processing analysis of laser-induced breakdown spectroscopy data for the discrimination of obsidian sources by Remus, Jeremiah J, Harmon, Russell S, Hark, Richard R, Haverstock, Gregory, Baron, Dirk, Potter, Ian K, Bristol, Samantha K, East, Lucille J

“…Obsidian is a natural glass of volcanic origin and a primary resource used by indigenous peoples across North America for making tools. Geochemical studies of…”
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Synthetic studies of novel ninhydrin analogs by Hark, Richard R, Hauze, Diane B, Petrovskaia, Olga, Joullié, Madeleine M

“…Ninhydrin is an essential tool in the analysis of amino acids, peptides, and proteins, and the preferred reagent for the detection of latent fingerprints on…”
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Spectroscopic Investigations of Bourdichon Miniatures: Masterpieces of Light and Color by Burgio, Lucia, Clark, Robin J. H., Hark, Richard R., Rumsey, Mike S., Zannini, Carlotta

“…Metallic bismuth, pyrite (FeS2), and specular hematite (Fe2O3) were found to have been used extensively on two miniatures taken from the Book of Hours of Louis…”
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Bromination of 5-Methoxyindane: Synthesis of New Benzoindenone Derivatives and Ready Access to 7H-Benzo[c]fluoren-7-one Skeleton by Tutar, Ahmet, Berkil, Kıymet, Hark, Richard R., Balci, Metin

“…The photobromination of 5-methoxyindane and 5-methoxyindanone was studied at both high and low temperatures. 1,2,3-Tribromo-6-methoxyindene was easily…”
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Discriminating volcanic centers with handheld laser-induced breakdown spectroscopy (LIBS) by Harmon, Russell S., Throckmorton, Chandra S., Hark, Richard R., Gottfried, Jennifer L., Wörner, Gerhard, Harpp, Karen, Collins, Leslie

“…Microcrystalline igneous rocks of volcanic origin, such as basalt or rhyolite, were a common source of prehistoric stone tools. This study explores the use of…”
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Geographical analysis of “conflict minerals” utilizing laser-induced breakdown spectroscopy by Hark, Richard R., Remus, Jeremiah J., East, Lucille J., Harmon, Russell S., Wise, Michael A., Tansi, Benjamin M., Shughrue, Katrina M., Dunsin, Kehinde S., Liu, Chunyi

“…Laser-induced breakdown spectroscopy (LIBS) offers a means of rapidly distinguishing different geographic sources for a mineral because the LIBS plasma…”
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Consecutive losses of two benzyl radicals from the [M+Na]+ adduct ions of di- and tri(benzyloxy)benzenes under ESI/CID conditions by Kuck, Dietmar, Heitkamp, Sandra, Sproß, Jens, Letzel, Matthias C., Ahmed, Ishtiaq, Krohn, Karsten, Parker, Robert G., Wang, Yulun, Robbins, Virginia J., Ames, William M., Schettler, Paul D., Hark, Richard R.

“…[Display omitted] •We analyze the ESI/CID processes of di- and trihydroxybenzene benzyl ethers.•Deuterium-labelled [M+Na]+ ions reveal highly regioselective CC…”
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Site-specific hydrogen exchange and hydrogen transfer processes preceding the fragmentation of long-lived radical cations of ethyl dihydrocinnamate and related arylalkanoates by Amick, Aaron W., Hoegg, Edward, Harrison, Sean, Houston, Katelyn R., Hark, Richard R., Reingold, I. David, Barth, Dieter, Letzel, Matthias C., Kuck, Dietmar

“…[Display omitted] ► Complete 4H-scrambling in metastable radical cations of ethyl dihydrocinnamate. ► Specific hydrogen transfer involving the benzylic…”
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Can the provenance of the conflict minerals columbite and tantalite be ascertained by laser-induced breakdown spectroscopy? by Harmon, Russell S, Shughrue, Katrina M, Remus, Jeremiah J, Wise, Michael A, East, Lucille J, Hark, Richard R

“…Conflict minerals is a term applied to ores mined in conditions of armed conflict and human rights abuse. Niobium and tantalum are two rare metals whose…”
Get full text