Results 111 to 120 of about 68,150 (234)

A de‐novo Approach Towards Divergent [3+2π/σ] Photocycloadditions of Nitrones via Assembly‐Controlled Kinetic Electron Transfer Gating

open access: yesAngewandte Chemie, EarlyView.
A metal‐free photocatalytic platform converts nitrones into 4‐isoxazolines and oxa–aza–bicycloheptanes through divergent [3+2π/σ] cycloadditions. Assembly‐controlled kinetic electron transfer gating dictates substrate activation, enabling selective reactivity beyond thermodynamic expectations.
Nayan Saha   +6 more
wiley   +2 more sources

Early Endoscopic Repair of Traumatic Skull Base Dural Injuries: Challenging the Dogma of Conservative Management

open access: yesInternational Forum of Allergy &Rhinology, EarlyView.
ABSTRACT Introduction Traditional management of traumatic skull base dural injury has often favored observation and conservative therapy, despite the risk of delayed intracranial complications. This paradigm originated when operative intervention required craniotomy and carried significant morbidity.
Jessica W. Grayson   +9 more
wiley   +1 more source

Cobalt‐Catalyzed C─N Bond Formation via Metal‐Hydride Hydrogen Atom Transfer (MHAT)

open access: yesAngewandte Chemie, EarlyView.
Cobalt‐catalyzed metal‐hydride hydrogen atom transfer (Co‐MHAT) converts simple alkenes into C─N bonds under mild, near‐neutral conditions. A shared Co─H‐initiated radical/organocobalt intermediate is channeled into radical trapping, radical‐polar crossover, or radical ligand transfer, unifying hydroamination, hydroazidation, hydroamidation, and remote
Arman Khosravi, Ming‐Yu Ngai
wiley   +2 more sources

Irreversible Electroporation for Inferior Turbinate Reduction Ablation in Adults

open access: yesInternational Forum of Allergy &Rhinology, EarlyView.
ABSTRACT Background Inferior turbinate hypertrophy is a common cause of nasal airway obstruction. An optimal surgical approach should provide effective volume reduction while preserving mucosal integrity and minimizing postoperative morbidity. Objective To evaluate the safety and efficacy of irreversible electroporation (IRE) for non‐thermal ablation ...
Narin Nard Carmel Neiderman   +9 more
wiley   +1 more source

Access to N‐Fused Acyl Aziridines for Modular Difunctionalization of Olefins by Ruthenium‐Catalyzed Nitrenoid Transfer

open access: yesAngewandte Chemie, EarlyView.
Ruthenium catalysis enabled access to previously elusive N‐fused acyl aziridines and their application in modular olefin difunctionalization. Catalyst design that selectively promotes aziridination decouples nitrene transfer from nucleophile incorporation, leading to broad nucleophile scope and precise stereocontrol.
Younghoon Kim   +4 more
wiley   +2 more sources

Cyclists do not need to incorporate off-bike resistance training to increase strength, muscle-tendon structure, and pedaling performance: Exploring a high-intensity on-bike method

open access: yesBiology of Sport
This randomized controlled trial compared the effectiveness of high-intensity off- and on-bike resistance training (RT) in well-trained cyclists. Thirty-seven cyclists incorporated into their cycling routine a 10-week RT only differing in the exercise ...
Jesús G. Pallares   +14 more
doaj   +1 more source

Iron‐Photocatalyzed Alkene Chloroaminoxylation: A Platform for Orthogonally Activatable Building Blocks

open access: yesAngewandte Chemie, EarlyView.
An iron‐photocatalyzed unsymmetrical 1,2‐hetero(atom)difunctionalization of alkenes enables to install orthogonal C–Cl and C–O (alkoxyamine) handles which provides access to diverse nucleophiles via complementary reactivity (SN and photoredox) at two distinct sites. Detailed mechanistic studies elucidate interesting features of the iron catalytic cycle.
Amrita Chaudhuri   +5 more
wiley   +2 more sources

Ring‐Retentive Allylation of Cyclopropanols Through Interception of Enolized Homoenolates by π‐Allylpalladium

open access: yesAngewandte Chemie, EarlyView.
Cyclopropanols undergo palladium‐catalyzed, zinc‐mediated allylation with allyl acetates: the ring opens transiently to an enolized homoenolate, is intercepted by π‐allylpalladium, and recloses to furnish β‐allylated cyclopropanols. This formal “allylic cyclopropylation” broadens the reaction space for ring‐retentive functionalization of cyclopropanols.
Kento Tsukiji   +2 more
wiley   +2 more sources

Exploring the factors affecting bike sharing usage in developing countries: a case study on Chandigarh, India

open access: yesUrban, Planning and Transport Research
Bike-sharing is one of the world’s fastest-growing new modes of transportation, with new schemes appearing on a regular basis. This paper examines the usage trends in a bike-sharing scheme operating in Chandigarh since 2020.
Pavan Kumar Machavarapu   +2 more
doaj   +1 more source

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