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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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Photochemically Mediated Polymerization of Molecular Furan and Pyridine: Synthesis of Nanothreads at
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Linearly Polymerized Benzene Arrays As Intermediates, Tracing Pathways to Carbon Nanothreads
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Tin-Free Direct C–H Arylation Polymerization for High Photovoltaic Efficiency Conjugated Copolymers
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Highly Stereoselective Heterogeneous Diene Polymerization by Co-MFU-4 l : A Single-Site Catalyst Prepared by Cation Exchange
Abstract not provided
Magnetic Levitation To Characterize the Kinetics of Free-Radical Polymerization
Not provided.
Protein Labeling via a Specific Lysine-Isopeptide Bond Using the Pilin Polymerizing Sortase from Corynebacterium diphtheriae
Proteins that are site-specifically modified with peptides and chemicals can be used as novel therapeutics, imaging tools, diagnostic reagents and materials. However, there are few enzyme-catalyzed methods currently available to selectively conjugate peptides to internal sites within proteins. Here we show that a pilus-specific sortase enzyme from Corynebacterium diphtheriae ((Cd)SrtA) can be used to attach a peptide to a protein via a specific lysine-isopeptide bond. Using rational mutagenesis we created (Cd)SrtA(3M), a highly activated cysteine transpeptidase that catalyzes in vitro isopeptide bond formation. (Cd)SrtA(3M) mediates bioconjugation to a specific lysine residue within a fused domain derived from the corynebacterial SpaA protein. Peptide modification yields greater than >95% can be achieved. We demonstrate that (Cd)SrtA(3M) can be used in concert with the Staphylococcus aureus SrtA enzyme, enabling dual, orthogonal protein labeling via lysine-isopeptide and backbone-peptide bonds.
Packaging pDNA by Polymeric ABC Micelles Simultaneously Achieves Colloidal Stability and Structural Control
Abstract not provided
Gold-Catalyzed Post-Polymerization Modification of Commodity Aromatic Polymers
Not Available
Conformation and Hydrogen-Bond-Assisted Polymerization in Glycine Lithium Sulfate at High Pressures
Abstract not provided
Relationship between Molecular Structure and Electron Transfer in a Polymeric Nitroxyl-Radical Energy Storage Material
Abstract not provided
Bicontinuous Polymeric Microemulsions from Polydisperse Diblock Copolymers
Abstract not provided
Steric Effects of the Initiator Substituent Position on the Externally Initiated Polymerization of 2-Bromo-5-iodo-3-hexylthiophene
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Ligand-Based Steric Effects in Ni-Catalyzed Chain-Growth Polymerizations Using Bis(dialkylphosphino)ethanes
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Effect of Nanoscale Morphology on the Conductivity of Polymerized Ionic Liquid Block Copolymers
Abstract not provided
Light Harvesting Arrays of Polypyridine Ruthenium(II) Chromophores Prepared by Reversible Addition–Fragmentation Chain Transfer Polymerization
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