Results 21 to 30 of about 230,516 (204)

Identification of alkaloids and related intermediates of Dendrobium officinale by solid-phase extraction coupled with high-performance liquid chromatography tandem mass spectrometry

open access: yesFrontiers in Plant Science, 2022
Jasmonate (JA) signaling plays a pivotal role in plant stress responses and secondary metabolism. Many studies have demonstrated that JA effectively induce the expressions of alkaloid biosynthetic genes in various plants, which rendered to the ...
Cheng Song   +3 more
doaj   +1 more source

Regulation mechanism of long non-coding RNA in plant secondary metabolite biosynthesis

open access: yesNotulae Botanicae Horti Agrobotanici Cluj-Napoca, 2022
Long non-coding RNAs (lncRNAs) are widely available transcription products of more than 200 nucleotides with unrecognizable coding potential. A large number of lncRNAs have been identified in different plants.
Yuting LI   +5 more
doaj   +1 more source

Detection of substrate binding motifs for morphine biosynthetic pathway intermediates in novel wound inducible (R,S)-reticuline 7-O-methyltransferase of Papaver somniferum [PDF]

open access: yes, 2011
The benzylisoquinoline alkaloids (BIA) comprise a large and diverse group of nitrogen-containing secondary metabolites with about 2500 compounds identified in plants.
Abha Meena   +5 more
core   +2 more sources

Analytical Quality by Design approach in development and optimization of HPLC method for assay of angiotensin – converting enzyme inhibitor in tablets [PDF]

open access: yesMakedonsko Farmacevtski Bilten
Implementation of analytical quality by design approach is a helpful tool in development of a robust analytical method which is applicable throughout the lifecycle of the product.
Veronika Popovska Jakimovska   +7 more
doaj   +1 more source

Review on Chemical Constituents and Biological Activity of Piper betle L.

open access: yesShipin gongye ke-ji, 2022
As a “medicine food homology” plant, the Piper betle L. has the characteristics of spicy, slightly sweet, and warm in nature, which can be used for treating cold, cough, stomachache, and eczema.
Tailing JIANG   +9 more
doaj   +1 more source

Poison Frog Colors Are Honest Signals Of Toxicity, Particularly For Bird Predators [PDF]

open access: yes, 2012
Antipredator defenses and warning signals typically evolve in concert. However, the extensive variation across taxa in both these components of predator deterrence and the relationship between them are poorly understood.
Cummings, Molly E., Maan, Martine E.
core   +3 more sources

Comprehensive Assessment of Degradation Behavior of Simvastatin by UHPLC/MS Method, Employing Experimental Design Methodology

open access: yesInternational Journal of Analytical Chemistry, 2018
This manuscript describes comprehensive approach for assessment of degradation behavior of simvastatin employing experimental design methodology as scientific multifactorial strategy.
Maja Hadzieva Gigovska   +6 more
doaj   +1 more source

ANet: Autoencoder-Based Local Field Potential Feature Extractor for Evaluating An Antidepressant Effect in Mice after Administering Kratom Leaf Extracts [PDF]

open access: yesarXiv, 2022
Kratom (KT) typically exerts antidepressant (AD) effects. However, evaluating which form of KT extracts possesses AD properties similar to the standard AD fluoxetine (flu) remained challenging. Here, we adopted an autoencoder (AE)-based anomaly detector called ANet to measure the similarity of mice's local field potential (LFP) features that responded ...
arxiv  

Effect of hydrogen bonding and complexation with metal ions on the fluorescence of luotonin A [PDF]

open access: yes, 2013
Fluorescence characteristics of a biologically active natural alkaloid, luotonin A (LuA), were studied by steady-state and time-resolved spectroscopic methods.
Abraham   +45 more
core   +1 more source

Validacija na metod za opredeluvanje mikrobioloska cistota na Kafetin® tableti [PDF]

open access: yesMakedonsko Farmacevtski Bilten, 2003
Izvrsena e validacija na metodot za opredeluvawe mikrobioloska cistota na Kafetin® tableti. Za taa cel koristeni se test-mikroorganizmi: Escherichia coli, Pseudomonas aeruginosa ,Staphylococcus aureus, Candida albicans i Aspergillus niger, od ...
Dragi Todorovik   +2 more
doaj  

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