Search Results - "Koepke, J"
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Electrocatalytic Water Oxidation by a Homogeneous Copper Catalyst Disfavors Single-Site Mechanisms
Published in Journal of the American Chemical Society (28-06-2017)“…Deployment of solar fuels derived from water requires robust oxygen-evolving catalysts made from earth abundant materials. Copper has recently received much…”
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Crystallization of late-stage MORB under varying water activities and redox conditions: Implications for the formation of highly evolved lavas and oxide gabbro in the ocean crust
Published in Lithos (15-12-2018)“…In order to understand late magmatic processes that occur in the deep oceanic crust, we performed a phase-equilibria study in a representative late-stage…”
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Wet magmatic processes during the accretion of the deep crust of the Oman Ophiolite paleoridge: Phase diagrams and petrological records
Published in Tectonophysics (20-10-2021)“…The Oman Ophiolite is regarded as an analogue to modern fast-spreading ocean ridge systems in an environment of subduction zone initiation. In contrast to…”
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Phase Relations and Liquid Lines of Descent in Hydrous Ferrobasalt—Implications for the Skaergaard Intrusion and Columbia River Flood Basalts
Published in Journal of petrology (01-09-2008)“…Crystallization experiments using a hydrous ferrobasalt as starting material, conducted at 200 MPa, 940–1200°C, at a wide range of water activities (0·1–1) and…”
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Zircon record of fractionation, hydrous partial melting and thermal gradients at different depths in oceanic crust (ODP Site 735B, South-West Indian Ocean)
Published in Contributions to mineralogy and petrology (01-03-2017)“…Felsic veins (plagiogranites) are distributed throughout the whole oceanic crust section and offer insight into late-magmatic/high temperature hydrothermal…”
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The rising tide of opioid use and abuse: the role of the anesthesiologist
Published in Perioperative medicine (London) (03-07-2018)“…Opioid use has risen dramatically in the past three decades. In the USA, opioid overdose has become a leading cause of unintentional death, surpassing motor…”
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Inducing Electronic Changes in Graphene through Silicon (100) Substrate Modification
Published in Nano letters (13-07-2011)“…We have performed scanning tunneling microscopy and spectroscopy (STM/STS) measurements as well as ab initio calculations for graphene monolayers on clean and…”
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All-optical lithography process for contacting nanometer precision donor devices
Published in Applied physics letters (06-11-2017)“…We describe an all-optical lithography process that can make electrical contact to nanometer-precision donor devices fabricated in silicon using scanning…”
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The effect of water activity on the oxidation and structural state of Fe in a ferro-basaltic melt
Published in Geochimica et cosmochimica acta (01-11-2005)“…Experimental investigations have been performed at T = 1200°C, P = 200 MPa and fH 2 corresponding to H 2O-MnO-Mn 3O 4 and H 2O-QFM redox buffers to study the…”
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10
Evaluation of a bioprocessed soybean meal on nursery pig performance and immune status
Published in Journal of animal science (01-11-2017)“…A total of 239 pigs (initial BW 6.56 ± 0.87 kg, 21 d of age) were used in a 35-d study to investigate the effects of fish meal (FM) and spray dried plasma…”
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11
Magma‐Mush Interactions in the Lower Oceanic Crust: Insights From Atlantis Bank Layered Series (Southwest Indian Ridge)
Published in Journal of geophysical research. Solid earth (01-09-2021)“…Magma migration and differentiation processes are key to understanding the development and evolution of oceanic magma reservoirs. To provide new quantitative…”
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Petrogenesis of oceanic plagiogranites by partial melting of gabbros: an experimental study
Published in Contributions to mineralogy and petrology (01-01-2004)“…We performed hydrous partial melting experiments at shallow pressures (0.2 GPa) under slightly oxidizing conditions (NNO oxygen buffer) on oceanic cumulate…”
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13
Dynamic Accretion Beneath a Slow‐Spreading Ridge Segment: IODP Hole 1473A and the Atlantis Bank Oceanic Core Complex
Published in Journal of geophysical research. Solid earth (01-12-2019)“…809 deep IODP Hole U1473A at Atlantis Bank, SWIR, is 2.2 km from 1,508‐m Hole 735B and 1.4 from 158‐m Hole 1105A. With mapping, it provides the first 3‐D view…”
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14
A Reference Section Through Fast‐Spread Lower Oceanic Crust, Wadi Gideah, Samail Ophiolite (Sultanate of Oman): Petrography and Petrology
Published in Journal of geophysical research. Solid earth (01-01-2022)“…In the absence of a complete profile through fast‐spreading modern oceanic crust, we established a reference profile through the whole paleo crust of the…”
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Anatomy of a frozen axial melt lens from a fast-spreading paleo-ridge (Wadi Gideah, Oman ophiolite)
Published in Lithos (01-02-2017)“…At fast-spreading mid-ocean ridges, axial melt lenses (AMLs) sandwiched between the sheeted dyke section and the uppermost gabbros are assumed to be the major…”
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Trace element diffusion in andesitic melts: an application of synchrotron X-ray fluorescence analysis
Published in Geochimica et cosmochimica acta (01-05-2001)“…—We have investigated the diffusivity of trace elements in hydrous iron-free andesitic melts containing 4.5 to 5.2 wt.% water at a pressure of 500 MPa and at…”
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17
pH Modulates the Quinone Position in the Photosynthetic Reaction Center from Rhodobacter sphaeroides in the Neutral and Charge Separated States
Published in Journal of molecular biology (10-08-2007)“…The structure of the photosynthetic reaction-center from Rhodobacter sphaeroides has been determined at four different pH values (6.5, 8.0, 9.0, 10.0) in the…”
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Formation of Igneous Layering in the Lower Oceanic Crust From the Samail Ophiolite, Sultanate of Oman
Published in Journal of geophysical research. Solid earth (01-01-2021)“…As the largest and best exposed example of paleo fast‐spreading oceanic crust on land, the Samail ophiolite in the Sultanate of Oman represents an ideal…”
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Sulfur and chlorine solubility in Mt. Unzen rhyodacitic melt at 850 °C and 200 MPa
Published in Chemical geology (01-12-2004)“…The solubilities of S and Cl have been determined at 850 °C, 200 MPa, and fO 2 ∼NNO in a rhyodacitic melt of the Unzen volcano in equilibrium with a fluid…”
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Systems of Care Delivery and Optimization in the Preoperative Arena
Published in Anesthesiology clinics (01-12-2023)“…Key elements of an effective preoperative process include the following: history-taking, risk assessment, shared decision making, effective interdisciplinary…”
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