Correction for 'An EPR study of ampullosporin A, a medium-length peptaibiotic, in bicelles and vesicles' by Marco Bortolus et al., Phys. Chem. Chem. Phys., 2016, 18, 749-760.
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A single outer-sphere amino-acid substitution turns on the NO reactivity of a hemerythrin-like protein.
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Department of Chemical Physiology and Biochemistry, School of Medicine, Oregon Health & Science University 3181 SW Sam Jackson Park Road Portland Oregon 97239 USA
Mycobacterial hemerythrin-like proteins (HLPs) are important for the survival of pathogens in macrophages. Their molecular mechanisms of function remain poorly defined but recent studies point to their possible role in nitric oxide (NO) scavenging. Unlike any nonheme diiron protein studied so far, the diferric HLP from (-HLP) reacts with NO in a multistep fashion to consume four NO molecules per diiron center.
View Article and Find Full Text PDFUsing NMR Spectroscopy to Evaluate Metal-Ligand Bond Covalency for the f Elements.
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Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States.
ConspectusUnderstanding f element-ligand covalency is at the center of efforts to design new separations schemes for spent nuclear fuel, and is therefore of signficant fundamental and practical importance. Considerable effort has been invested into quantifying covalency in f element-ligand bonding. Over the past decade, numerous studies have employed a variety of techniques to study covalency, including XANES, EPR, and optical spectroscopies, as well as X-ray crystallography.
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Jiangsu Key Laboratory for Biomaterials and Devices, School of Biomedical Sciences and Medical Engineering, Southeast University, Nanjing 210096, P. R. China.
The blood flow, when restored clinically following a myocardial infarction (MI), disrupts the physiological and metabolic equilibrium of the ischemic myocardial area, resulting in secondary damage termed myocardial ischemia-reperfusion injury (MIRI). Reactive oxygen species (ROS) generation and inflammatory reactions stand as primary culprits behind MIRI. Current strategies focusing on ROS-scavenging and anti-inflammatory actions have limited remission of MIRI.
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Indian Institute of Science Education and Research Bhopal Department of Chemistry, Chemistry, Room No. 226, Academic Block - 2, Indore By-pass Road, Bhauri, 462066, Bhopal, INDIA.
Unraveling the electronic structure of metal complexes can bring various catalytic possibilities for hydrogen evolution reaction (HER). However, the electronic effect of metal and ligands modulating and switching the reaction center for HER has yet to be comprehensively analyzed. Herein, we report nickel selenoether electrocatalysts which show tunable reaction centers (nickel or ligand) for HER using mild weak acetic acid in less deprotonating DMF solvent.
View Article and Find Full Text PDFComposite spin probes with adjustable oxygen sensitivity for pulse electron paramagnetic resonance imaging.
Magn Reson Med
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Oxygen Measurement Core, O2M Technologies, LLC, Chicago, Illinois, USA.
Purpose: Solid crystalline spin probes, such as lithium phthalocyanine (LiPc) and lithium octa-n-butoxynaphthalocyanine (LiNc-BuO), allow repeated oxygen measurement using electron paramagnetic resonance (EPR). Due to their short relaxation times, their use for pulse EPR oxygen imaging is limited. In this study, we developed and tested a new class of solid composite spin probes that modified the relaxation rates R and R of LiPc or LiNc-BuO probes, which allowed pO measurements in the full dynamic (0-760 torr) range.
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