Results 121 to 130 of about 402,046 (367)

Photoredox‐Catalyzed Synthesis of a Novel Class of Fluoroalkyl Pyrazolones

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
A photoredox strategy enables regioselective synthesis of fluoroalkyl 2‐pyrazolin‐5‐ones via radical addition and cyclization. This mild, metal‐free method shows a broad substrate scope, operates in batch and flow systems, and offers a sustainable approach to fluorinated heterocycles with potential applications in medicinal chemistry.
Emanuele F. Pissinati   +3 more
wiley   +1 more source

An Atypical Case of Taravana Syndrome in a Breath-Hold Underwater Fishing Champion: A Case Report

open access: yesCase Reports in Medicine, 2013
Dysbaric accidents are usually referred to compressed air-supplied diving. Nonetheless, some cases of decompression illness are known to have occurred among breath-hold (BH) divers also, and they are reported in the medical literature.
Andrea Cortegiani   +6 more
doaj   +1 more source

Nitrous Oxide: Mechanism of Its Antinociceptive Action [PDF]

open access: yes, 1995
Nitrous oxide (N2O) is an anesthetic gas known to produce an analgesic effect at sub-anesthetic concentrations. This analgesic property of N2O can be clinically exploited in a broad range of conditions where pain relief is indicated.
Quock, Raymond M., Vaughn, Linda K.
core   +1 more source

Cooperative Rh2(OAc)4/Chiral Phosphoric Acid‐Catalyzed (3 + 3)‐Cycloadditions of Pyrrole‐3‐Methides and Carbonyl Ylides

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
A stereoselective one‐step (3 + 3)‐cycloaddition between in situ generated pyrrole‐3‐methides and carbonyl ylides has been developed using cooperative rhodium and chiral phosphoric acid catalysis. The reaction affords oxa‐bridged cyclohepta[1,2‐b]pyrroles bearing three stereogenic centers, including two quaternary ones, in high yields and ...
Philipp Stehr, Christoph Schneider
wiley   +1 more source

SENSORY REGRESSION TIME FROM SUBARACHNOID BLOCK WITH HYPERBARIC 0.75% BUPIVACAINE IN THE OBESE PATIENT [PDF]

open access: yes, 1989
The purpose of this study was to determine if obese patients have a different sensory regression time from subarachnoid block than non-obese patients using hyperbaric 0.75% bupivacaine. A quasi-experimental design was used. Twenty patients were separated
Hilton, George Leslie
core   +1 more source

Regular versus Irregular Exercise Differentially Modulates Hippocampal‐Hepatic Acetylcholine Flux to Coordinate Fear Memory Extinction and Liver Inflammation

open access: yesAdvanced Science, EarlyView.
Ma et al. report the hippocampal and hepatic acetylcholine (ACh) levels are differently modulated by regular versus irregular exercise, which contributes to coordinate hippocampal astrocyte activity and hepatic FBXL6high neutrophil recruitment. This ACh‐modulated brain‐liver circuit links the effects of exercise on fear memory extinction and liver ...
Pengjiao Ma   +10 more
wiley   +1 more source

The Evolution of Obstetric Analgesia [PDF]

open access: bronze, 1940
A. M. Claye, W. Sykes
openalex   +1 more source

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