Results 131 to 140 of about 334,731 (408)

Synthesis of hexa (imidazolyl) cyclotriphosphazene and its performance as curing catalyst of epoxy resin

open access: yesCailiao gongcheng, 2019
Hexa (imidazolyl) cyclotriphosphazene (HImCP) was synthesized by nucleophilic substitution reaction of hexachlorocyclotriphosphazene with imidazole. The chemical structure was characterized by FT-IR,1H-NMR, and 31P-NMR.
ZHANG Bo-wen   +6 more
doaj   +1 more source

Ionization behavior of the histidine residue in the catalytic triad of serine proteases [PDF]

open access: yes, 1973
α-Lytic protease is a homologue of the mammalian serine proteases such as trypsin, chymotrypsin, and elastase, and its single histidine residue belongs to the Asp-His-Ser catalytic triad. This single histidine residue has been selectively enriched in the
Hunkapiller, Michael W.   +3 more
core  

Allosteric modulation of DNA by small molecules [PDF]

open access: yes, 2009
Many human diseases are caused by dysregulated gene expression. The oversupply of transcription factors may be required for the growth and metastatic behavior of human cancers.
Chenoweth, David M., Dervan, Peter B.
core   +3 more sources

Strategies for Controlling Emission Anisotropy in Lead Halide Perovskite Emitters for LED Outcoupling Enhancement

open access: yesAdvanced Materials, EarlyView.
The rise of lead halide perovskite semiconductors has enabled high‐performance LEDs with internal quantum efficiencies approaching 100%. In order to further enhance the external quantum efficiencies limited by light outcoupling effects, in this account, the strategies for reducing energy dissipation through the substrate, waveguide, and evanescent ...
Tommaso Marcato   +2 more
wiley   +1 more source

Convenient Synthesis of Thiohydantoins, Imidazole-2-thiones and Imidazo[2,1-b]thiazol-4-iums from Polymer-Supported α-Acylamino Ketones

open access: yesMolecules, 2018
The preparation of 5-methylene-thiohydantoins using solid-phase synthesis is reported in this paper. After sulfonylation of immobilized Ser (t-Bu)-OH with 4-nitrobenzenesulfonyl chloride followed by alkylation with various bromoketones, the 4-Nos group ...
Petra Králová   +3 more
doaj   +1 more source

Advancing Metal–Organic Framework‐Based Composites for Effective Chemical Warfare Agent Detoxification under Real‐World Conditions

open access: yesAdvanced Materials, EarlyView.
This review describes recent developments in the design and synthesis of metal–organic frameworks (MOF)/textile composites for the detoxification of chemical warfare agent and simulants with extensive discussion on the advantages and disadvantages of different methods.
Zhihua Cheng   +4 more
wiley   +1 more source

4-[(1H-Imidazol-1-yl)methyl]-1-(4-nitrobenzyl)-1H-1,2,3-triazole

open access: yesIUCrData, 2017
The title molecule, C13H12N6O2, adopts a slightly twisted zigzag conformation in the crystal, with the dihedral angles between the central triazole ring and the 4-nitrophenyl and imidazole rings being 79.81 (11) and 81.21 (13)°, respectively. The packing
Azzeddine Sahbi   +5 more
doaj   +1 more source

Oligoglyceric acid synthesis by autocondensation of glyceroyl thioester [PDF]

open access: yes
The autocondensation of the glyceroyl thioester, S-glyceroyl-ethane-thiol, yielded olioglyceric acid. The rates of autocondensation and hydrolysis of the thioester increased from pH 6.5 to pH 7.5 in 2,6-lutidine and imidazole buffers.
Weber, A. L.
core   +1 more source

State‐of‐the‐Art, Insights, and Perspectives for MOFs‐Nanocomposites and MOF‐Derived (Nano)Materials

open access: yesAdvanced Materials, EarlyView.
Different approaches to MOF‐NP composite formation, such as ship‐in‐a‐bottle, bottle‐around‐the‐ship and in situ one‐step synthesis, are used. Owing to synergistic effects, the advantageous features of the components of the composites are beneficially combined, and their individual drawbacks are mitigated.
Stefanos Mourdikoudis   +6 more
wiley   +1 more source

1-Vinyl-4-imidazoline-2-thione

open access: yesIUCrData, 2017
The title compound, C5H6N2S, was obtained by deprotonation of 1-vinylimidazole and subsequent reaction with elemental sulfur. In the crystal, the molecules are linked by N—H...S and C—H...S hydrogen bonds, and arranged in layers parallel to the ab plane.
Martin Lampl   +4 more
doaj   +1 more source

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