Search Results - "Witzke, J."

Shape-Selective Synthesis of Pentacene Macrocycles and the Effect of Geometry on Singlet Fission by Bergman, Harrison M, Kiel, Gavin R, Witzke, Ryan J, Nenon, David P, Schwartzberg, Adam M, Liu, Yi, Tilley, T. Don

“…Pentacene’s extraordinary photophysical and electronic properties are highly dependent on intermolecular through-space interactions. Macrocyclic arrangements…”
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Titanocene-Mediated Dinitrile Coupling: A Divergent Route to Nitrogen-Containing Polycyclic Aromatic Hydrocarbons by Kiel, Gavin R, Samkian, Adrian E, Nicolay, Amélie, Witzke, Ryan J, Tilley, T. Don

“…A general synthetic strategy for the construction of large, nitrogen-containing polycyclic aromatic hydrocarbons (PAHs) is reported. The strategy involves two…”
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Nontraditional Catalyst Supports in Surface Organometallic Chemistry by Witzke, Ryan J., Chapovetsky, Alon, Conley, Matthew P., Kaphan, David M., Delferro, Massimiliano

“…The field of Surface Organometallic Chemistry (SOMC) aims to blend the positive attributes of homogeneous and heterogeneous catalysis. Significant insight into…”
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Bivalved arthropods from the Middle Ordovician Winneshiek Lagerstätte, Iowa, USA by Briggs, Derek E.G, Liu, Huaibao P, McKay, Robert M, Witzke, Brian J

“…The Middle Ordovician (Darriwilian) Winneshiek Lagerstätte of northeast Iowa is preserved in a meteorite crater. Besides conodonts, the fossils are dominated…”
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Late Ordovician (Turinian–Chatfieldian) carbon isotope excursions and their stratigraphic and paleoceanographic significance by Ludvigson, Greg A, Witzke, Brian J, González, Luis A, Carpenter, Scott J, Schneider, Chris L, Hasiuk, Franciszek

“…Five positive carbon isotope excursions are reported from Platteville–Decorah strata in the Upper Mississippi Valley. All occur in subtidal carbonate strata,…”
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Two-Coordinate Iron(I) Complexes on the Edge of Stability: Influence of Dispersion and Steric Effects by Witzke, Ryan J, Hait, Diptarka, Head-Gordon, Martin, Tilley, T. Don

“…Sequential treatment of Fe­[N­(SiMe3)­DIPP]2 (2) with Et3NHCl, IAd, and KC8 (IAd = 1,3-diadamantyl-imidazolin-2-ylidene, DIPP = 2,6-diisopropylphenyl) results…”
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Bimetallic Mechanism for Alkyne Cyclotrimerization with a Two-Coordinate Fe Precatalyst by Witzke, Ryan J, Hait, Diptarka, Chakarawet, Khetpakorn, Head-Gordon, Martin, Tilley, T. Don

“…The two-coordinate compound (IPr)­Fe­[N­(SiMe3)­DIPP] (IPr = 1,3-bis­(2,6-diisopropylphenyl)­imidazolin-2-ylidene; DIPP = 2,6-diisopropylphenyl) catalyzes the…”
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Endovascular Repair with Bifurcated Stent-Grafts under Local Anaesthesia to Improve Outcome of Ruptured Aortoiliac Aneurysms by Lachat, M.L., Pfammatter, Th, Witzke, H.J., Bettex, D., Künzli, A., Wolfensberger, U., Turina, M.I.

“…Introduction: acute haemodynamic changes and/or loss of abdominal muscle tone can occur during induction of general anaesthesia and may be the Achilles' tendon…”
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Switchable Product Selectivity in Diazoalkane Coupling Catalyzed by a Two-Coordinate Cobalt Complex by Dong, Yuyang, Lipschutz, Michael I, Witzke, Ryan J, Panetier, Julien A, Tilley, T. Don

“…The low-coordinate monovalent cobalt complex (IPr)­Co­[N­(SiMe3)­DIPP] [2, IPr = 1,3-bis­(2,6-diisopropylphenyl)­imidazol-2-ylidene; DIPP =…”
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The oldest described eurypterid: a giant Middle Ordovician (Darriwilian) megalograptid from the Winneshiek Lagerstätte of Iowa by Lamsdell, James C, Briggs, Derek E G, Liu, Huaibao P, Witzke, Brian J, McKay, Robert M

“…Eurypterids are a diverse group of chelicerates known from ~250 species with a sparse Ordovician record currently comprising 11 species; the oldest fully…”
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Photocatalytic Transfer Hydrogenation in Water: Insight into Mechanism and Catalyst Speciation by Kaphan, David M, Brereton, Kelsey R, Klet, Rachel C, Witzke, Ryan J, Miller, Alexander J. M, Mulfort, Karen L, Delferro, Massimiliano, Tiede, David M

“…Organometallic catalysts with strong metal-to-ligand charge-transfer (MLCT) optical transitions and reactive metal–hydride bonds provide opportunities for new…”
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Melt Blending: A Tool To Simplify Plastic Scintillator Synthesis by Myllenbeck, Nicholas R., Benin, Annabelle I., Garcia, Gail F., Tran, Huu M., Witzke, Ryan J., Feng, Patrick L.

“…Plastic scintillators are widely used as radiation detection media in homeland security and nuclear physics applications. Their attributes include low cost,…”
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Metastatic cancer in the Jurassic by Rothschild, Bruce M, Witzke, Brian J, Hershkovitz, Israel

“…Recognition of cancer in extreme antiquity has been limited to osteomas in mosasaurs and haemangiomas and growths of unclear origin in dinosaurs. We describe a…”
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The Winneshiek biota; exceptionally well-preserved fossils in a Middle Ordovician impact crater by Briggs, Derek E. G, Liu, Huaibao P, McKay, Robert M, Witzke, Brian J

“…The Winneshiek Shale (Middle Ordovician, Darriwilian) was deposited in a meteorite crater, the Decorah impact structure, in NE Iowa. This crater is 5.6 km in…”
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Siloxyaluminate and Siloxygallate Complexes as Models for Framework and Partially Hydrolyzed Framework Sites in Zeolites and Zeotypes by Dombrowski, James P., Ziegler, Micah S., Phadke, Neelay M., Mansoor, Erum, Levine, Daniel S., Witzke, Ryan J., Head‐Gordon, Martin, Bell, Alexis T., Tilley, T. Don

“…Anionic molecular models for nonhydrolyzed and partially hydrolyzed aluminum and gallium framework sites on silica, M[OSi(OtBu)3]4− and HOM[OSi(OtBu)3]3−…”
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The mid-Cretaceous water bearer: isotope mass balance quantification of the Albian hydrologic cycle by Ufnar, David F., A. González, Luis, Ludvigson, Greg A., Brenner, Robert L., Witzke, Brian J.

“…A latitudinal gradient in meteoric δ18O compositions compiled from paleosol sphaerosiderites throughout the Cretaceous Western Interior Basin (KWIB) (34–75°N…”
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Reconstructing a Mid-Cretaceous landscape from paleosols in Western Canada by Ufnar, David F, González, Luis A, Ludvigson, Greg A, Brenner, Robert L, Witzke, Brian J, Leckie, Dale

“…The Albian Stage of the mid-Cretaceous was a time of equable climate conditions with high sea levels and broad shallow epeiric seas that may have had a…”
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Other conditions of the lung (abscesses, inhaled foreign bodies, bullous lung disease, hydatid) by Witzke, Herbert J, Anikin, Vladimir

“…Abstract Lung abscess remains a common complication of pneumonia and aspiration, particularly in immunosuppressed patients and must be differentiated from a…”
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Exceptionally preserved conodont apparatuses with giant elements from the Middle Ordovician Winneshiek Konservat-Lagerstätte, Iowa, USA by Liu, Huaibao P, Bergström, Stig M, Witzke, Brian J, Briggs, Derek E. G, McKay, Robert M, Ferretti, Annalisa

“…Considerable numbers of exceptionally preserved conodont apparatuses with hyaline elements are present in the middle-upper Darriwilian (Middle Ordovician,…”
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TAPHONOMY AND BIOLOGICAL AFFINITY OF THREE-DIMENSIONALLY PHOSPHATIZED BROMALITES FROM THE MIDDLE ORDOVICIAN WINNESHIEK LAGERSTÄTTE, NORTHEASTERN IOWA, USA by HAWKINS, ANDREW D, LIU, HUAIBAO P, BRIGGS, DEREK E. G, MUSCENTE, A D, MCKAY, ROBERT M, WITZKE, BRIAN J, XIAO, SHUHAI

“…The Winneshiek Lagerstätte occurs within an Ordovician meteorite impact structure beneath part of the city of Decorah, Iowa. The Lagerstätte has yielded an…”
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