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Results for “COMPLEXITY”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Crystal Structure of the Double Homeodomain of DUX4 in Complex with DNA
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Correlated Protein Environments Drive Quantum Coherence Lifetimes in Photosynthetic Pigment-Protein Complexes
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HIV-1 matrix-tRNA complex structure reveals basis for host control of Gag localization
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Surface complexation modeling of proton and metal sorption onto graphene oxide
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Reductive functionalization of 3d metal–methyl complexes: The greater importance of ligand than metal
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A generic implementation of replica exchange with solute tempering (REST2) algorithm in NAMD for complex biophysical simulations
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Biophysical characterization dataset of native nicotinic acetylcholine receptor in lipid-like detergent complexes
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Shuffled Complex-Self Adaptive Hybrid EvoLution (SC-SAHEL) optimization framework
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AcsA–AcsB: The core of the cellulose synthase complex from Gluconacetobacter hansenii ATCC23769
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Investigation of ovotransferrin conformation and its complexation with sugar beet pectin
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Impact of iron porphyrin complexes when hydroprocessing algal HTL biocrude
We apply Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) for direct characterization of iron-porphyrins in hydrothermal liquefaction (HTL) biocrude oils derived from two algae: Tetraselmis sp. and cyanobacteria. The ironporphyrin compounds are shown to cause catalyst bed plugging during hydroprocessing due to iron deposition. Inductively-coupled plasma optical emission spectrometry (ICPOES) was utilized for iron quantitation in the plugged catalyst beds formed through hydroprocessing of the two HTL biocrudes and identifies an enrichment of iron in the upper five centimeters of the catalyst bed for Tetraselmis sp. (Fe=100,728 ppm) and cyanobacteria (Fe=115,450 ppm). Direct infusion FT-ICR MS analysis of the two HTL biocrudes with optimized instrument conditions facilitates rapid screening and identification of iron-porphyrins without prior chromatographic separation. With FT-ICR MS we identify 138 unique iron-porphyrin compounds in the two HTL biocrudes that are structurally similar to metal-porphyrins (e.g. Ni and V) observed in petroleum. No ironporphyrins are observed in the cyanobacteria HTL biocrude after hydroprocessing, which indicates that iron-porphyrin structures in the HTL biocrude are degraded during hydroprocessing. Hydrodemetallization reactions that occur through hydroprocessing of HTL biocrudes could be responsible for the decomposition of iron-porphyrin structures leading to metal deposition in the catalyst bed that result in catalyst deactivation and bed plugging, and must be addressed for effective upgrading of algal HTL biocrudes.
Direct measurements of copper speciation in basaltic glasses: understanding the relative roles of sulfur and oxygen in copper complexation in melts
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