Results 91 to 100 of about 131,699 (232)

Nanometer Layer Coating to Lactose Particles for Optimization of Dexamethasone Pulmonary Delivery

Advanced Science, EarlyView.
Nanometer layer coating (NLC) was investigated and its mechanism illustrated by advanced characterization techniques. The effects and application for the inhalation of dexamethasone (DEX) were demonstrated through in vitro and in vivo evaluation. This approach increased DEX bioavailability and enabled the dose to be reduced to 1/30 of the intravenous ...
Qin Nie, Jiahe Liu, Xiangyu Zhao, Siying Yang, Han Sun, Bingqian Jia, Xiaohong Ren, Xintao Chen, Lixin Sun, Li Wu, Caifen Wang, Jiwen Zhang   +11 more
wiley   +1 more source

Divergent Synthesis of Möbius and Hückel N‐Heterocycloarenes From a Common Macrocyclic Backbone

Angewandte Chemie, EarlyView.
In the divergent synthesis of Möbius and Hückel N‐heterocycloarenes from a common macrocyclic precursor, the annulation reaction dictates topology: Scholl reaction gives Möbius topology, while InCl3‐mediated alkyne annulation gives Hückel topology. The Möbius N‐heterocycloarene is unevenly contorted as revealed by crystal structure, and the Hückel N ...
Han Chen, Huishu Ma, Daiyue Yang, Zheng Zhou, Xiao Chen, Zhifeng Huang, Qian Miao   +6 more
wiley   +2 more sources

Pseudomonas aeruginosa gene PA4880 encodes a Dps-like protein with a Dps fold, bacterioferritin-type ferroxidase centers, and endonuclease activity

Frontiers in Molecular Biosciences
We report the biochemical, structural, and functional characterization of the protein coded by gene PA4880 in the P. aeruginosa PAO1 genome. The PA4880 gene had been annotated as coding a probable bacterioferritin.
Nimesha Rajapaksha, Huili Yao, Aisha Cook, Steve Seibold, Lijun Liu, Kevin P. Battaile, Leo Fontenot, Fabrizio Donnarumma, Scott Lovell, Mario Rivera   +9 more
doaj   +1 more source

Regulating Uniform Zinc Deposition via Covalently Tethered Imidazolium Cations in Polyacrylamide Hydrogel Electrolytes for Stable Aqueous Zinc Batteries

Advanced Energy Materials, EarlyView.
A positively charged polyionic liquid hydrogel electrolyte is developed for highly stable aqueous zinc‐ion batteries. Imidazolium cations anchored on the polymer framework create a dynamic electrostatic shield at the anode interface. This active layer effectively repels water molecules and guides uniform zinc deposition, thereby suppressing dendrite ...
Junlei Liu, Bingbing Han, Yuan Wang, Weiwei Hou, Yijing Gao, Yixiang Niu, Dianyu Tang, Rasheedat M. Mahamood, Ben Bin Xu, Cheng Zhang   +9 more
wiley   +1 more source

A Wagner–Meerwein‐Like Rearrangement Generates a Vinyl Group in the Biosynthesis of the Polychlorinated Lipopeptides Fischerazoles

Angewandte Chemie, EarlyView.
The fischerazoles, unusual cyanobacterial chlorinated lipopeptides are reported. During their biosynthesis, a linear fatty acyl‐acyl carrier protein (ACP) precursor is rearranged through the action of the S‐adenosyl‐methionine (SAM)‐dependent methyltransferase FshF, to generate a pendant vinyl group.
Sandra A. C. Figueiredo, Kathleen Abt, Konrad Viehrig, Peter J. Jervis, Teresa P. Martins, Iñaki Lacomba, Chuhan Li, Daniele Castagnolo, Pedro N. Leão   +8 more
wiley   +2 more sources

A Novel Class of “Super‐Strained” Spiro Heterocycles: Gateway to 1‐Azaspiro[3.3]heptane Derivatives, and Biological Validation

Angewandte Chemie, EarlyView.
A new class of “super‐strained” spiro heterocycles—spirocyclic 1‐azabicyclo[1.1.0]butanes—was synthesized via insertion of cyclobutane‐, oxetane‐, and azetidine‐containing sulfonium reagents into substituted azirines. The stability of this new class of compounds was studied.
Philipp Natho, Annarita Vicenti, Marco Colella, Francesco Pasca, Giuseppe Romanazzi, Mauro Niso, Carmen Abate, Ernesto Mesto, Emanuela Schingaro, Renzo Luisi   +9 more
wiley   +2 more sources

Beyond Simple Mimicry: Next‐Generation Geometric Architectures and Future Paradigms in Small‐Molecule and Macrocyclic Peptidomimetics

Angewandte Chemie, EarlyView.
Peptide‐to‐Small Molecule Paradigm: Peptidomimetics have evolved from simple mimicry toward drug‐like scaffolds supported by increasing clinical successes. This Perspective highlights the geometric design principles—linear repetition, convergent fusion, and cyclization—defining the next‐generation peptidomimetic architectures capable of targeting ...
Jesang Lee, Sumin Son, Jeong Yeon Yoo, Ji Hyae Lee, Meehyun Chun, Seung Bum Park   +5 more
wiley   +2 more sources

[O─I─O]+ Halogen‐Bonded Complexes of Pyridine N‐Oxides

Angewandte Chemie, EarlyView.
The missing puzzle of 3‐center‐4‐electron halogen‐bonded complexes viz. [O─I─O]+ of pyridine N‐oxides are structurally characterized by x‐ray diffraction. Monodentate N‐oxide O‐atom acts as the halogen bond acceptor. Their solution complexations are characterized by 15N NMR spectroscopy.
Rakesh Puttreddy, Sergi Burguera, Antonio Frontera, Kari Rissanen   +3 more
wiley   +2 more sources

Solvent organization in the ultrahigh-resolution crystal structure of crambin at room temperature

IUCrJ
Ultrahigh-resolution structures provide unprecedented details about protein dynamics, hydrogen bonding and solvent networks. The reported 0.70 Å, room-temperature crystal structure of crambin is the highest-resolution ambient-temperature structure of a ...
Julian C.-H. Chen, Miroslaw Gilski, Changsoo Chang, Dominika Borek, Gerd Rosenbaum, Alex Lavens, Zbyszek Otwinowski, Maciej Kubicki, Zbigniew Dauter, Mariusz Jaskolski, Andrzej Joachimiak   +10 more
doaj   +1 more source

Kinetically Stable Boron‐Heteroatom Bonds

Angewandte Chemie, EarlyView.
This study investigates the kinetic stability of boron‐heteroatom bonds in N‐methyliminodiacetic acid (MIDA) boronates. The hemilabile nature of the ligand enables the synthesis of molecules that would otherwise be considered too hydrolytically labile. Depending on the structure, acid‐promoted migration of the boryl group was found to produce compounds
Alina Trofimova, Ben Zhen Huang, Harjeet S. Soor, Brandon White, Aleksandra Holownia, Yury Lebedev, Alan J. Lough, Travis Dudding, Andrei K. Yudin   +8 more
wiley   +2 more sources