Conference presentation (International only)

Utsunomiya S. (2019) Cesium-rich micro-particles: A window into the meltdown events at the Fukushima Daiichi Nuclear Power Plant. March 8, 2019, School of Chemical Engineering Seminar Programme, University of Adelaide, Australia.

Ochiai A., Imoto J., Furuki G., Ikehara R., Suetake M., Yamasaki S., Ohnuki T., Law G.T.W., Grambow B., Ewing R.C., and Utsunomiya S. (2018) Nuclear Fuel Fragments Released from the Fukushima Daiichi Nuclear Power Plant. August 19 – 23, 2018, 256th ACS National Meeting, Boston MA, United States. (Invited)

Imoto J., Ochiai A., Furuki G., Ikehara R., Suetake M., Horie K., Takehara M., Yamasaki S., Nanba K., Ohnuki T., Law G.T.W., Grambow B., Ewing R.C., and Utsunomiya S. (2018) Isotopic Signature and Nano-texture of Cesium-rich Micro-particles: Release of Uranium and Fission Products from the Fukushima Daiichi Nuclear Power Plant. August 19 – 23, 2018, 256th ACS National Meeting, Boston MA, United States. 

Utsunomiya S., Ochiai A., Imoto J., Suetake M., Komiya T., Furuki G., Ikehara R., Morooka K., Kurihara E.(2018) Speciation of Uranium Released to the Environment with Cesium-Rich Microparticles from the Fukushima Daiichi Nuclear Power Plant (FDNPP). August 12 – 17, 2018, Goldschmidt Conference, Boston, United States.

Kawamoto K., Ochiai A., Takeda A., Nakano Y., Ohnuki T., Utsunomiya S. (2018) Remediation mechanisms of uranium mill-tailing site at Ningyo-toge, Japan, under the circumneutral condition. August 12 – 17, 2018, Goldschmidt Conference, Boston, United States.

Ikehara R., Suetake M., Komiya T., Furuki G., Ochiai A., Yamasaki S., Bower W., Law G., Ohnuki T., Grambow B., Ewing R.C., Utsunomiya S. (2018) Novel Method to Quantify Radioactive Cesium-rich Microparticles (CsMPs) in the Environment from the Fukushima Daiichi Nuclear Power Plant. August 12 – 17, 2018, Goldschmidt Conference, Boston, United States.

Utsunomiya S., Ochiai A., Imoto J., Suetake M., Komiya T., Furuki G., Ikehara R., Morooka K., Kurihara E.(2018) Speciation of Uranium Released to the Environment with Cesium-Rich Microparticles from the Fukushima Daiichi Nuclear Power Plant (FDNPP). August 12 – 17, 2018, Goldschmidt Conference, Boston, United States.

Ichiyoshi, K., Ochiai, A., Ohnuki, T., Utsunomiya, S. (2017) Nanocrystallization of rare earth phosphate using extracellular substances derived from Saccharomyces cerevisiae. August 13-18, 2017, Goldschmidt Conference, Paris, France.

Furuki, G., Ikehara, R., Suetake, M., Ochiai, A., Imoto, J., Yamasaki, S., Nanba, K., Ohnuki, T., Utsunomiya, S. (2017) Migration of Cs-rich microparticles released from the FDNPP in the surface environments. August 13-18, 2017, Goldschmidt Conference, Paris, France.

Ochiai, A., Imoto, J., Furuki, G., Ikehara, R., Suetake, M., Yamasaki, S., Nanba, K., Ohnuki, T., Grambow, B., Ewing, R.C., Utsunomiya, S. (2017) Nuclear fuel fragments released from the Fukushima Daiichi Nuclear Power Plant. August 13-18, 2017, Goldschmidt Conference, Paris, France.

Imoto, J., Ochiai, A., Furuki, G., Ikehara, R., Suetake, M., Horie, K., Takehara, M., Yamasaki, S., Nanba, K., Ohnuki, T., Law, G.T.W., Grambow, B., Ewing, R.C., and Utsunomiya, S. (2017) Isotopic Signature and Nano-texture of Cesium-rich Micro-particles: Release of Uranium and Fission Products from the Fukushima Daiichi Nuclear Power Plant. August 13-18, 2017, Goldschmidt Conference, Paris, France.

Utsunomiya S. (2017) Cesium-rich micro-particles: A window into the meltdown events at the Fukushima Daiichi Nuclear Power Plant. April 2-6, 2017, 253rd ACS National Meeting, San Francisco, California, United States. (Invited)

Utsunomiya S. (2016) Challenging radionuclides in environment at the atomic scale: Issues in waste disposal and Fukushima. June 26-1 July, 2016, Goldschmidt conference, Yokohama, Japan. (Plenary Talk)

Imoto J., Furuki G., Ochiai A., Yamasaki S., Nanba K., Ohnuki T., Grambow B., Ewing R. C. & Utsunomiya S. (2016) Cesium-rich micro-particles unveil the explosive events in the Fukushima Daiichi Nuclear Power Plant. June 26-1 July, 2016, Goldschmidt conference, Yokohama, Japan.

Ochiai A. and Utsunomiya S. (2016) Mineralization of rare earth elements as phosphate at room temperature. June 26-1 July, 2016, Goldschmidt conference, Yokohama, Japan.

Nakano Y., Masaki S. and Utsunomiya S. (2016) Effects of organic molecules on the  aggregation of CeO₂ nanoparticles. June 26-1 July, 2016, Goldschmidt conference, Yokohama, Japan.

Utsunomiya S., Kawamoto, Y., Masaki S., Shiotsu, H., Kaneko, M., Ohnuki, T., and Nanba, K. (2014) Cesium occurrence and the stability in Fukushima soils. June 8-13, 2014, Goldschmidt conference, Sacramento, USA.

Kaneko M., Iwata H., Kawamoto Y., Shiotsu H., Ohnuki T., Nanba K. and Utsunomiya S. (2013) Role of submicron-sized particles on the ^134,137Cs migration in Fukushima. August 25-30, 2013, Goldschmidt conference, Florence, Italy.

Masaki S., Shiotsu H., Sakamoto F., Ohnuki T. and Utsunomiya S. (2013) Interaction of nanoparticles with microorganisms. August 25-30, 2013, Goldschmidt conference, Florence, Italy.

Shiotsu H. (2013) Mechanism and crystallochemical signature of nano-particle formation by microorganisms. August 25-30, 2013, Goldschmidt conference, Florence, Italy.

Nakamatsu Y., Aoki T., and Utsunomiya S. (2013) Nature of transition metals on fine and ultrafine particles and the cytotoxicity. August 25-30, 2013, Goldschmidt conference, Florence, Italy.

Utsunomiya S. (2013) Nano- and molecular-scale phenomena in the subsurface environment with nanoparticles and microorganisms; implication to nuclear waste management, November 12-13, 2013, The 15th ASRC International Workshop “Specific behavior of anthropogenic radionuclides at solid solution interface: implication for migration and remediation”, Unix Bld. Fukushima, Japan

Utsunomiya S., Shiotsu H., Jiang M., Ohnuki T. (2013) Nanoparticle formation of lanthanides on Saccharomyces cerevisiae, February 18-19, 2013, Japan-UK workshop, The Studio, Birmingham, UK.

Ohnuki T., Kozai N., Sakamoto F., Yamasaki S., Utsunomiya S., Nishiguchi N., Suzuki Y. (2013) Accumulation of lanthanides and actinides by microorganisms – present status, February 18-19, 2013, Japan-UK workshop, The Studio, Birmingham, UK.

Utsunomiya S.  (2012) Cesium contamination in Fukushima soils and exploration of effective decontaminant, International workshop on post-Fukushima challenges in nuclear safety and environmental contamination, June 4 - 5, 2012, Pohang University of Science and Technology, Pohang, Republic of Korea.

Shiotsu H., Jiang M., Nakamatsu Y., Ohnuki T., Utsunomiya S (2012) Characteristic　of the long-term accumulation of lanthanides on Saccharomyces cerevisiae, Montreal, Canada, June 24-29, 2012

Utsunomiya S. (2011) Microscopic View of Colloids Associated with Radionuclides in the Environments Migration 2011, 13th International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere, September 18 - 23, 2011, Beijing, China. Invited

Iwata H., Sakamaki K., Yasuda K., Ohnuki T. & Utsunomiya S. (2011) Fate of Plutonium Derived From the Atomic Bomb Detonated at Nagasaki, Japan, Migration 2011, 13th International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere, September 18 - 23, 2011, Beijing, China.

Sakamaki K., Iwata H., Kamiishi E & Utsunomiya S. (2011) Alteration of Bentonite-Iron System under the Hyper Alkaline Condition, Migration 2011, 13th International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere, September 18 - 23, 2011, Beijing, China.

Kamiishi E. & S. Utsunomiya S. (2011) Mechanism of Selenite Sequestration by Low-Soluble Phosphate Minerals, Migration 2011, 13th International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere, September 18 - 23, 2011, Beijing, China.

Jiang M., Ohnuki T., Tanaka K., Kozai N., Kamiishi E. & Utsunomiya S. (2011) Post-Adsorption Process of REE (Sm, Yb) Phosphate Nano-Mineralization by Microorganism, Migration 2011, 13th International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere, September 18 - 23, 2011, Beijing, China.

Kaneko M., Nakamatsu Y., Xie Z. & Utsunomiya S. (2011) Physical and Chemical State of Fe-phases in Chinese Dust Storm, August 14-19, Goldschmidt Conference, Prague, Czech Republic

Nakamatsu Y., Kaneko M., Kogawa M., S. Utsunomiya S.(2011) Chemical state of Fe on fine and ultrafine particles in the urban atmosphere in Japan, Workshop Study on Radionuclides Migration for Environmental Safety Assessment, SSRF, Shanghai, September 26-27, 2011

Utsunomiya S. (2011) Importance of XAFS study in Environmental Chemistry. Workshop Study on Radionuclides Migration for Environmental Safety Assessment, SSRF, Shanghai, September 26-27, 2011

Utsunomiya S. (2010) Nanoscale Occurrence of Radionuclides in the Environments Revealed by Scanning Transmission Electron Microscopy (STEM), The 2010 International Chemical Congress of Pacific Basin Societies (Pacifichem 2010), Honolulu, Hawaii, USA, December 15-20, 2010. INVITED

Nishita C, Kogawa M & Utsunomiya S. (2010) Chemical State of Fe in Fine and Ultrafine Particles in the Urban Atmosphere, June13-18, Goldschmidt conference, TN, USA

Sakamaki K & Utsunomiya S. (2010) Nanoscale Process in the Alteration of Bentonite-Iron System Under the Hyper Alkarine Conditions, June13-18, Goldschmidt conference, TN, USA

Kogawa M, Watson B, Ewing R & Utsunomiya S. (2010) Pb-Incorporation into Synthetic Pb-Doped Ziricon, June 13-18, Goldschmidt conference, TN, USA

Kamisihi E & Utsunomiya S. (2010) Mechanism of Selenite Sequestration byLow-Soluble Phosphate Minerals, June 13-18, Goldschmidt conference, TN, USA

Jiang M, Ohnuki T, Kamiishi E, Tanaka K, Kozai N, Suzuki Y & Utsunomiya S.(2010) Biological Nano-Mineralization of Yb phosphate by Saccharomyces cerevisiae, June 13 - 18, Goldschmidt conference, TN, USA 

Jiang, M., Ohnuki, T., Tanaka, K., Suzuki, Y., Utsunomiya, S. (2009) Biomineralization of REE phosphate nano-minerals by Saccharomyces cerevisiae, Migration2009, Sep.20-25, Kennewick, WA, USA.

Utsunomiya S., Kersting A., Ewing, R.C. (2009) Groundwater nanoparticles in the far-field at the Nevada Test site, Migration2009, Sep.20-25, Kennewick, WA, USA.

Utsunomiya S. (2009) Colloid Transport of Plutonium in the Far-field of the Mayak Production Association, Russia. Yonsei University – Kyushu University symposium, Seoul, South Korea.

Utsunomiya S. (2009) Behavior of nanoparticles associated with radionuclides. Russian-German symposium on actinide nanoparticles, May 21-22, Moscow, Russia.

Jiang M., Jensen K.A., Utsunomiya S. (2009) Atmospheric Nanoparticle: Multi-scale Analysis on Speciation of Toxic Metals in Urban and Indoor Dust. Goldschmidt conference, Davos, Switzerland.

Utsunomiya S. (2009) Groundwater Nanoparticles in the Far-field at the Nevada Test Site. Goldschmidt conference, Davos, Switzerland.

Kamiishi E., Utsunomiya S.(2009) Nano-scale phenomena in the interaction between apatite and aqueous Pb. Goldschmidt conference, Davos, Switzerland.

Deditius A.P., Utsunomiya S., Kesler S.E., Ewing R.C. and Walshe J. (2009) Behaviour of trace elements in arsenian pyrite in ore deposits. The 10th Biennal Meeting of SGA, Townsville, 17-20 August.

 Deditius A.P., Utsunomiya S. and Kesler S.E. (2008) Decoupling of Cu and As in Magmatic-hydrothermal systems: Evidence from the Pueblo Viejo Au-Ag Deposit, Dominican Republic. Goldschmidt Conference, July 13-18, Vancouver, Canada – INVITED. Geochim. Cosmochim. Acta 72, A206.

 Utsunomiya S., Deditius A.P., Pointeau V. and Ewing R.C. (2008) Coffinite and Ningyoite from the natural, nuclear reactor at Bangombé, Gabon. Goldschmidt Conference, July 13-18, Vancouver, Canada. Geochim. Cosmochim. Acta 72, A968.

Deditius A.P., Utsunomiya S., Renock D., Reich M., Ewing R.C., Chryssoulis S.L., Venter D., Ramana C.V., Becker U. and  Kesler S.E. (2008) Nanoscale geochemistry and mineralogy of arsenian pyrite in ore deposits. Gordon Research Conference: Geochemistry of Mineral Deposits, 06.29-07.04, Il Ciocco, Italy.

Deditius A.P., Pointeau V., Utsunomiya S., Poinssot C., Ewing R.C. (2007) Stability of coffinite, USiO4, under reducing and oxidizing conditions. Migration 2007, August 26-31, 2007 München, Germany - Invited.

Deditius A.P., Utsunomiya S., Ramana C.V., Kesler S.E., Ewing R.C. (2007) New form of arsenian pyrite, (Fe,As3+)S2. Frontiers in Mineral Sciences 2007, June 28-28, 2007 Cambridge, Great Britain.

 Deditius A.P., Utsunomiya S., Kesler S.E., Ewing R.C. (2007) Crystal chemistry of Hf-rich kosnarite [KZr2(PO4)3]. Frontiers in Mineral Sciences 2007, June 28-28, 2007 Cambridge, Great Britain.D. Renock, S. Utsunomiya, T. J. Gallegos, K. F. Hayes, R. C. Ewing, and U. Becker, “Arsenic uptake and release on sulfide nanoparticles” Goldschmidt conference 2007, Cologne, Germany. August 19-24, 2007.

A. Rey, S. Utsunomiya, J. Gimenez, I. Casas, J. de Pablo, R. C. Ewing, “Stability of synthetic uranium(VI) peroxide hydrates under ionizing radiation” Migration 2007, Munich, Germany, August 26-31, 2007

S. Utsunomiya, R. C. Ewing, A. P. Novikov, S. N. Kalmykov, F. Horreard, A. Merkulov, S. B. Clark, V. V. Tkachev, B. F. Myasoedov, “Colloid Transport of Plutonium in the Far-field of the Mayak Production Association, Russia”, 233rd American Chemical Society Meeting, March 25-29, 2007, Chicago, IL, USA INVITED

A. P. Deditius., S. Utsunomiya and R. C. Ewing, “Formation and alteration of coffinite (USiO4) in the Grants uranium deposits, New Mexico.” 223rd American Chemical Society National Meeting, Chicago, Illinois, March 25-29, 2007

C. V. Ramana, S. Utsunomiya, R. C. Ewing, U. Becker, K. Zaghib & C.M. Julien, “Synthesis, Structure, and Electrochemical Properties of Li4Ti5O12” Materials Research Society, Boston, Massachusetts, November/December 27-01,2006, Boston, MA, USA.

A. P. Deditius, S. Utsunomiya and R.C. Ewing, “Alteration of coffinite (USiO4) under reducing and oxidizing conditions”. Materials Research Society, Boston, Massachusetts, November/December 27-01,2006, Boston, MA, USA.

S. Utsunomiya, “Nanoparticles of Trace Elements in the Environment” Slovenia & US workshop on Environmental Science & Engineering” September 27-30, 2006, Ljubljana, Slovenia. INVITED

S. Utsunomiya, “Migration of trace elements via nanoscale process” 19th General Meeting of International Mineralogical Association, July 23-28, 2006, Kobe JAPAN. INVITED

A. Deditius, S. Utsunomiya, R. C. Ewing, “Alteration of UO2 under oxidizing conditions” 2006 Plutonium Future, July 9-13, 2006, Pacific Grove, California, USA.

D. Renock, U. Becker, S. Utsunomiya, R. C. Ewing, “STEM and electrochemical SFM characterization of As-containing nanoscale phases on iron sulfides” 231st National Meeting of American Chemical Society, March 26-30, 2006, Atlanta, Georgia, USA.

S. Utsunomiya, R. C. Ewing, “Radiation effects in garnet” American Geophysical Union, spring meeting, May 23-26, 2006, Baltimore, Maryland, USA.

M. Reich, S. Utsunomiya, U. Becker, R. C. Ewing, L. M. Wang, "Nanoparticle-host interaction in the solid state: temperature-induced dissolution and growth of natural gold nanoparticles in arsenian pyrite", NanoPEPS Workshop, January 11-13, 2006, Albuquerque, New Mexico, USA.

S. Utsunomiya, R. C. Ewing, "Nanoscale occurrence of trace metals revealed by Z-contrast STEM Imaging" NanoPEPS Workshop, January 11-13, 2006, Albuquerque, New Mexico, USA.

R. Chintalapalle, S. Utsunomiya, C. Julien and U. Becker, "Investigation of Temperature Induced Structural Transformations in Tungsten Oxide (WO3) Thin Films", 208th Meeting of The Electrochemical Society, October 16-21, 2005, Los Angeles, USA.

S. Utsunomiya and R. C. Ewing, “The effect of ionizing radiation on U6+ phases”, Annual meeting of Geological Society of America, October 16-19, Salt Lake City, USA.

S. Delattre, S. Utsunomiya, R. C. Ewing, and E. Balan, “Radiation damage-enhanced chemical alteration of zircon in laterite at Nsimi, Cameroon” Annual meeting of Geological Society of America, October 16-19, Salt Lake City, USA.

M. Fayek, P.C. Goodell, M. Ren, L.R. Riciputi, A. Simmons, S. Utsunomiya, and R.C. Ewing, “Geochronology and Fluid-rock Interaction Associated with the Nopal I Uranium Deposit, Peña Blanca, Mexico”, Annual meeting of Geological Society of America, October 16-19, Salt Lake City, USA.

St. N. Kalmykov, A. P. Novikov, R. C. Ewing, S. Utsunomiya, "Effect of colloids on radionuclide migration in oxic and anoxic conditions". Migration 2005, September 18-23, 2005, Avignon, France.

T. Arnold, S. Utsunomiya, G. Geipel, R. C. Ewing, N. Baumann, V. Brendler, "Identification of adsorbed U(VI) surface species on muscovite by TRLFS and HAADF-STEM". Migration 2005, September 18-23, 2005, Avignon, France.

S. Utsunomiya, R. C. Ewing, "Fate of the epsilon phase in the Oklo natural reactors". Migration 2005, September 18-23, 2005, Avignon, France.

S. Utsunomiya, R. C. Ewing, "Radiation-induced decomposition of U6+ alteration phases of UO2". 29th International Symposium on the Scientific Basis for Radioactive Waste management, September 12-16, 2005, Ghent, Belgium. 

M. Reich, S. Utsunomiya, U. Becker, L. Wang, R. C. Ewing, "In situ observation of thermodynamic size effects on melting of natural gold nanoparticles"15th Annual V.M. Goldschmidt Conference, May 20-25, 2005, Moscow, Idaho.

S. Utsunomiya, "Identification of trace metal speciation in environment using Z-contrast imaging"15th Annual V.M. Goldschmidt Conference, May 20-25, 2005, Moscow, Idaho. Invited talk

S. Utsunomiya, R. C. Ewing, "The epsilon phase in the UO2 of the Oklo Natural Reactors" 15th Annual V.M. Goldschmidt Conference, May 20-25, 2005, Moscow, Idaho.

M. Fayek, S. Utsunomiya, R. C. Ewing, A. Simmons, "Natural uranium getters in near surface environments at the Nopal I Deposit Pena Blanca, Mexico"15th Annual V.M. Goldschmidt Conference, May 20-25, 2005, Moscow, Idaho. Invited talk

S. Utsunomiya, A. J. Cavosie, J. W. Valley, S. A. Wilde, and R. C. Ewing, “Radiation damage and alteration of zircon in granitiods from Jack Hills, western Australia”, Annual meeting of Geological Society of America, November 7-10, 2004, Denver, USA.

L. L. Skovbjerg , S. L. S. Stipp , S. Utsunomiya and R. C. Ewing, "Cr(VI) reduction by green rust" 14th Annual V.M. Goldschmidt Conference, June 5-11, 2004, Copenhagen, Denmark.

T. Murakami, M. Sato, S. Utsunomiya, T. Kasama and B. Sreenivas, "Behavior of light REE in Precambrian paleosols: Implication for atmospheric oxygen evolution" 14th Annual V.M. Goldschmidt Conference, June 5-11, 2004, Copenhagen, Denmark.

S. Utsunomiya, L. M. Wang, R. C. Ewing, S. B. Clark and M. Douglas, "The effect of ionizing radiation on uranophane" 2004 Spent Fuel Workshop, April 19-20, 2004, Lake Forest, Illinois, USA

S. Utsunomiya and R. C. Ewing, "Nanocrystals and Nanodomains of trace elements in geologic materials" Frontiers in Nanoscience and Nanotechnology: A Symposium", November 14-15, 2003, Ann Arbor, Michigan, USA.

K. A. Jensen, S. Utsunomiya, M. Glasius, P. Wåhlin, F. Palmgren, N. Ø. Olesend, S. Grundvig and R.C. Ewing, "Nano- and micro-mineralogy of airborne trace metals in the city background and a high-traffic street in Copenhagen (Denmark)". The 26th Nordic Geological Winter Meeting, January 6-9, 2004 Uppsala, Sweden.

M. Douglas, S. B. Clark, J. I. Friese, B. W. Arey, E. C. Buck, B. D. Hanson, S. Utsunomiya and R. C. Ewing, "Neptunium association with uranium (VI) silicate solid phases" 9th International Conference on Chemistry and Migration Behavior of Actinides and Fission Products in the Geosphere (MIGRATION '03). September 21-26, 2003, Gyeongju, South Korea.

F. Skomurski, S. Utsunomiya, and R. C. Ewing, "Role of vein phases in immobilizing uranium and lead released from altered betafite" Annual Meeting of Geological Society of America, November 2-5, 2003, Seattle, USA.

M. Reich, C. S. Palenik, S. Utsunomiya, U. Becker, L. Stixrude, S. E. Kesler, R. C.  Ewing "Solubility limit of gold in arsenian pyrite from Carlin-type and epithermal deposits: EMPA, SIMS, HRTEM and quantum-mechanical costraints", Annual Meeting of Geological Society of America, November 2-5, 2003, Seattle, USA.

M. Fayek, S. Utsunomiya, R. C. Ewing and L. Riciputi, "Nano- and Micro-scale alteration of uraninite at the Oklo-Okelobondo natural fission reactors, Gabon" Annual Meeting of Geological Society of America, November 2-5, 2003, Seattle, USA.

S. Utsunomiya, C. S. Palenik, J. W. Valley, A. J. Cavosie, S. A. Wilde and R. C. Ewing, "Fate of Pb in an Archean zircon" Annual Meeting of Geological Society of America, November 2-5, 2003, Seattle, USA.

K. A. Jensen, S. Utsunomiya, M. Glasius, F. Palmgren and R. C. Ewing "Identity of transition and heavy metal nanoparticles in the urban outdoor and indoor atmosphere: Implications for health effect assessments", The Seventh Nordic Conference on Toxicology and Environmental Mutagenesis, June 15-18 2003, Bornholm, Denmark. Abstract was published in Pharmacology and Toxicology, 93, Supplement I, p. 41-42

T. Murakami, S. Utsunomiya, T. Yokoyama, and T. Kasama, “Biotite dissolution processes and mechanisms: Early stage weathering environment” 13th Annual V.M. Goldschmidt Conference, September 7-12, 2003, Kurashiki, Japan.

S. Utsunomiya and R. C. Ewing, “Application of high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) to trace element Nanogeoscience” Spring meeting of Michigan Microscopy and Microanalysis, April 25, 2003, Ann Arbor, Michigan.

K. A. Traexler, S. Utsunomiya, A. Kersting, and R. C. Ewing, “Modeling colloid transport of radionuclides: Where are the data gaps for the Yucca mountain performance assessment” Scientific Basis for Radioactive Waste management XXVII, June 15-18, 2003, Kalmer, Sweden.

M. Fayek, S. Utsunomiya, R. C. Ewing, L. R. Riciputi, and K. A. Jensen, “The oxygen isotopic composition of nano-scale uraninite at the Oklo-Okelobondo natural fission reactors, Gabon” Uranium Geochemistry, April 13-16, 2003, Nancy, France.

S. Utsunomiya, K. A. Traexler, L. M. Wang, and R. C. Ewing, “Nano-scale heavy metal phases on atmospheric and groundwater colloids” 225th American Chemical Society Meeting, March 23-27, 2003, New Orleans, LA, USA.  Invited talk

M. Douglas, S. B. Clark, S. Utsunomiya, and R. C. Ewing, “Microscopy studies of cation incorporation into uranium (VI) solid phases” 225th American Chemical Society Meeting, March 23-27, 2003, New Orleans, LA, USA.

S. Nakao, S. Utsunomiya, K. Sun, L. M. Wang, Y. Miyagawa, and S. Miyagawa, "Microstructure of high-energy Zn implanted silica glasses" 17th International Conference on the Application of Accelerators in Research and Industry, CAARI 2002, November 12-16, 2002, Denton, Texas, USA.

S. Utsunomiya, K. A. Jensen, G. J. Keeler, and R. C. Ewing, "Uraninite Nanocrystals and Fullerene in Atmospheric Particulates" Annual Meeting of Geological Society of America, October 27-30, 2002, Denver, USA.

C. S. Palenik, S. Utsunomiya, S. E. Kesler, and R. C. Ewing, "Gold Nanoparticles in Arsenian Pyrite from Carlin-type Deposit Observed by HR-TEM" Annual Meeting of Geological Society of America, October 27-30, 2002, Denver, USA.

T. Murakami, J. Ito, S. Utsunomiya, and T. Kasama, "Biotite Dissolution under anoxic condition: implication for Fe Behavior during Anoxic Weathering" Annual Meeting of Geological Society of America, October 27-30, 2002, Denver, USA. 

S. Utsunomiya and R. C. Ewing, "Application of high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and STEM-energy dispersive X-ray spectrometry (EDX) mapping to investigate nano-scale particles in environment", 18th International Mineralogical Association, September 1-6, 2002, Edinburg, Scotland

T. Murakami, T. Kasama, and S. Utsunomiya, "Reconstruction of 2.5 Ga weathering of Pronto granite" 12th Annual V.M. Goldschmidt Conference, August 18-23, Davos, Switzerland. The abstract was published in Geochimica et Cosmochimica Acta, 66, S1, A537.

M. Douglas, S.B. Clark, S. Utsunomiya, and R.C. Ewing, "Ion-Substitution in a Uranium(VI) Silicate," Northwest Regional Meeting of the American Chemical Society, June 20-21, 2002, Spokane, Washington, USA.

S. Utsunomiya & R. C. Ewing, "Elemental Mapping & Redox State of Nano-particles by HAADF-STEM, EFTEM, STEM-EDX and PEELS." 39th Annual Meeting of the Clay Minerals Society, June 8-13, 2002, Boulder, Colorado, USA. 

A. Kersting, L. M. Wang, L. P. You, S. Utsunomiya, P. H. Zhao, R. C. Ewing, "Characterization of mineral colloids in ground water at the Nevada test site by advanced TEM techniques". Abstracts of papers of the American Chemical Society, 223 (2002): 151-GEOC Part 1 Apr. 7.

M. Douglas, S.B. Clark, S. Utsunomiya, R.C. Ewing, "Trace metal incorporation into Uranophane [Ca(UO2)(SiO3OH)2]5H2O", International conference on all aspects of the science and technology of actinides, Nov. 4-9, 2001.

S.V. Yudintsev, M.I. Lapina, T.S. Yudintseva, S. Utsunomiya, L.M. Wang, R.C. Ewing, "Isomorphic capacity and radiation stability of the garnet host for actinide waste immobilization", 2001, MRS fall meeting, Symposium JJ, Nov. 26-30.

S. Utsunomiya, L.M. Wang, R.C. Ewing, S.V. Yudintsev, "Ion irradiation effects in the garnet-based waste form", 2001, MRS fall meeting, Symposium JJ, Nov. 26-30.

S. Utsunomiya, L.M. Wang, R.C. Ewing, S.V. Yudintsev, "Ion irradiation effects in actinide and rare earth element garnets", 2001, the 11th international conference on radiation effects in insulators, Sept. 3-7.

S. Utsunomiya, T. Murakami, "Paleo-weathering or hydrothermal alteration? -Geochemistry and oxygen level from Enterprise and Pronto mine paleosols-" 1999 annual meeting, Geological Society of America.

S. Utsunomiya, T. Murakami, "Experimental study of the alteration process of basaltic glass under high partial pressure of carbon dioxide", 9th Annual V. M. Goldschmidt conference.

S. Utsunomiya, T. Murakami, K. Kitajima, and S. Maruyama, "Temperatures and concentrations of CO2 in fluids during hydrothermal alteration of basalts in the Archean. - The condition of the earth surfaces in the Archean -", 1998 Annual meeting, Geological Society of America.

T. Murakami and S. Utsunomiya, "Comparison of biotite dissolution in the laboratory and in the field by high-resolution transmission electron microscopy", 8th Annual V. M. Goldschmidt Conference. The extended abstract is published in Mineralogical Magazine, 62A (1998) 1044-1045

S. Utsunomiya, T. Murakami, K. Tsukimura, and H. Kadohara, "Experimental study of anorthite dissolution and its secondary minerals under high partial pressure of carbon dioxide", 7th Annual V. M. Goldschmidt Conference.

S. Utsunomiya, T. Murakami, K. Tsukimura, and H. Kadohara, "New data from an experimental study of feldspar dissolution processes under high partial pressure of carbon dioxide", 1997 Annual meeting, Geological Society of America.