English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Alkaloid extracts of eleven Narcissus (Amaryllidaceae) species and varieties were studied with respect to their acetylcholinesterase (HuAChE) and butyrylcholinesterase (HuBuChE) inhibitory activity and alkaloid patterns. Forty-two alkaloids were determined by GC/MS, and thirty of them identified from their mass spectra, retention times and retention indexes. Promising HuAChE inhibition activity was demonstrated by nine Narcissus taxa and HuBuChE inhibition by Narcissus poeticus cv. Pink Parasol with an IC 50  value of 3.3 ± 0.5 μg/mL. The alkaloid identified as (11C- S)-homolycorine was isolated in pure form from Narcissus Sir W. Churchill using preparative TLC and was tested for its biological activity. Homolycorine inhibited HuAChE and HuBuChE in a dose-dependent manner with IC 50  values of 63.7±4.3 μM and 151.0±15.2 μM, respectively.

Isolation and Cholinesterase Inhibitory Activity of Narcissus Extracts and Amaryllidaceae Alkaloid