Results 201 to 210 of about 5,185 (257)

Analyzing resuscitation conference content through the lens of the chain of survival. [PDF]

open access: yesResusc Plus
Fijačko N   +4 more
europepmc   +1 more source

Asymmetric Iron‐Catalyzed Vicinal C(sp3)─H Diamination of Carboxylic Acids

open access: yesAngewandte Chemie, EarlyView.
An iron‐catalyzed vicinal α,β‐C(sp3)─H diamination of readily available carboxylic acids furnishes chiral α,β‐diamino acids in a single pot with high regio‐, diastereo‐, and enantioselectivity (up to >20:1 dr and >99% ee). ABSTRACT The direct construction of chiral 1,2‐diamines through the stereoselective functionalization of two vicinal C(sp3)─H bonds
Bing Zhou   +5 more
wiley   +2 more sources

Assessment of safety and patency of 7-mm covered metal stents for preoperative biliary drainage in pancreatic cancer: Prospective multicenter study

open access: yesEndoscopy International Open
Hirotoshi Ishiwatari   +12 more
doaj   +1 more source

Light and Dark Cycles Control the Structural Evolution of Photoresponsive Supramolecular Systems

open access: yesAngewandte Chemie, EarlyView.
Here, we report a photoswitchable synthetic peptide that, under light energy cycles, exhibits supramolecular polymorphism coupled to darkness‐driven structural self‐selection. We demonstrate that light sustains a transient assembled state in the form of helical nanoribbons, hindering the system from undergoing a transition to the disassembled state ...
Alejandro Méndez‐Ardoy   +6 more
wiley   +2 more sources

Biliary stents reshape the bile microbiome in the absence of cholangitis

open access: yesEndoscopy International Open
Atsuto Kayashima   +5 more
doaj   +1 more source

π‐Radical Cascades to Peri‐Fused Triangulene Dimers

open access: yesAngewandte Chemie, EarlyView.
We demonstrate the potential of open‐shell molecular graphene fragments as synthons for constructing graphene nanostructures via π‐radical cascades. By identifying monoradical intermediates as key selectivity‐determining species and tuning steric effects in a triangulene precursor, we show that reactivity in a formally diradical system can be ...
Paula L. Widmer   +10 more
wiley   +2 more sources

Endoscopic ultrasound-guided transgastric drainage of pancreaticopleural fistulas

open access: yesEndoscopy International Open
Katarzyna M. Pawlak   +5 more
doaj   +1 more source

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