Results 41 to 50 of about 7,183 (228)

New‐Era Polymer Thermoelectrics: Material Innovations, Doping Frontiers, Decoupling Strategies, and Unconventional Applications

open access: yesAdvanced Materials, EarlyView.
The field of polymer thermoelectrics is entering a new era, featuring breakthroughs in addressing the conventional performance disparity between p‐type and n‐type polymers, pioneering doping frontiers, and sophisticated decoupling strategies. This review explores innovations in molecular design and superior stabilities, bridging the gap from ...
Suhao Wang
wiley   +1 more source

Coordination‐Driven Direct C─H Metalation of N‐Heterocycles With a Superbasic Co(II) Amide Co(TMP)2

open access: yesAngewandte Chemie, EarlyView.
By enabling regioselectivities that are inaccessible with conventional bases, this study introduces a Co(II) amide platform for the deprotonative C─H metalation of sensitive N‐heterocycles. Subsequent interception of the resulting Co(II) intermediates with external oxidants affords a family of sterically congested, TMP‐substituted heterocycles via C─N ...
Na Jin   +3 more
wiley   +2 more sources

Diisopropyl pyrazine-2,5-dicarboxylate [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2010
The mol-ecule of the title compound, C(12)H(16)N(2)O(4), is located on an inversion center. The carboxyl-ate groups are twisted slightly with respect to the pyrazine ring, making a dihedral angle of 6.4 (3)°.
Xiao-Qing Zhang   +3 more
openaire   +3 more sources

Streptavidins Coordinate Biotin Sequestration and Self‐Resistance Within a Biotin‐Pathway Antibiotic Network

open access: yesAdvanced Science, EarlyView.
A conserved genomic region between two streptavidin genes in Streptomyces packages biosynthetic gene clusters for diverse biotin‐pathway antibiotics: acidomycin, stravidin, the new non‐proteinogenic amino acid ANDA, and the new BioA inhibitor α‐methyl‐KAPA.
Sumire Kurosawa   +8 more
wiley   +1 more source

Gold(III) Semiquinone Complexes: Synthesis, Structure, and Application in Photocatalysis

open access: yesAngewandte Chemie, EarlyView.
Au(III) catecholate complexes engage into electron donor acceptor (EDA) interactions with aryldiazonium salts, enabling single‐electron transfer under green light irradiation. Ligand‐centered one‐electron oxidation to stable semi‐quinone complexes provides a new platform for standalone Au(III) photoredox catalysis, as substantiated by the C–H arylation
Miguel A. Gonzálvez   +8 more
wiley   +2 more sources

GC-IMS-Based Analysis of the Effect of Frying Temperature on Volatile Flavor Substances in Highland Barley Tsampa Flour

open access: yesShipin gongye ke-ji, 2023
To clarify the effects of different frying temperatures and grain colors on volatile organic compounds (VOCs) in highland barley (HB) tsampa flour, gas chromatography-ion mobility spectrometry (GC-IMS) was used to analyze the VOCs in two types of HB with
Yahong GUO   +8 more
doaj   +1 more source

Biobased pyrazines

open access: yes, 2022
Curiosity and sustainable development go hand in hand to help with the major problems of our time. This thesis shows how curiosity driven research can result in new insights. The thesis describes the development new building blocks from biomass, which have never been used in materials before, and their subsequent use in plastics.
openaire   +2 more sources

Diethyl pyrazine-2,5-dicarboxylate [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2012
The mol-ecule of the title compound, C(10)H(12)N(2)O(4), is located around an inversion center. The carboxyl-ate groups are twisted slightly with respect to the pyrazine ring, making a dihedral angle of 2.76 (19)°. In the crystal, mol-ecules are stacked along the c axis via weak C-H⋯O hydrogen bonds.
Chuan-Hui Li, Wen-Shi Wu, Yu-Min Huang
openaire   +3 more sources

Multimodal Imaging Reveals Rapid Catecholamine Uptake and Release by Neutrophils

open access: yesAdvanced Science, EarlyView.
We show that immune cells (neutrophils) synthesize, uptake, and store catecholamine neurotransmitters such as dopamine or adrenaline. They also release them in response to specific stimuli (serotonin), which we directly visualize using fluorescent nanosensors. We further demonstrate that catecholamines affect neutrophil functions (NETosis) and platelet
Jennifer Mohr   +19 more
wiley   +1 more source

Methyl pyrazine-2-carboxylate [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2009
The title compound, C(6)H(6)N(2)O(2), is approximately planar [r.m.s. deviation = 0.0488 (3) Å]. In the crystal, weak inter-molecular C-H⋯O and C-H⋯N inter-actions join the mol-ecules into an infinite three-dimensional network.
Chang-Hua Zhang   +2 more
openaire   +3 more sources

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