Purity Determination and Uncertainty Estimation of Natural Products Sourcing Chemical Reference Substances by High-Performance Liquid Chromatography and Differential Scanning Calorimetry

2021 ◽  
pp. 106257
Author(s):  
Fengqi Wang ◽  
Yanna Zhang ◽  
Qi Wu ◽  
Wei Xiao ◽  
Jingbo Zhu ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Natural Products ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Uncertainty Estimation ◽  
Scanning Calorimetry ◽  
Purity Determination

Incidence of the melting-degradation process of vitamin C on the determination of the phase diagram with acetaminophen enhanced by high performance liquid chromatography tools

2015 ◽  
Vol 39 (3) ◽  
pp. 1938-1942 ◽  
Author(s):  
Yohann Corvis ◽  
Marie-Claude Menet ◽  
Philippe Espeau
Keyword(s):  
Phase Diagram ◽  
Differential Scanning Calorimetry ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Degradation Process ◽  
Liquid Equilibrium ◽  
Scanning Calorimetry ◽  
Solid Liquid

The exact solid–liquid equilibrium between ascorbic acid and acetaminophen was established combining high performance liquid chromatography and differential scanning calorimetry.

scholarly journals Discovery of Primarolides A and B from Marine Fungus Asteromyces cruciatus Using Osmotic Stress and Treatment with Suberoylanilide Hydroxamic Acid

Marine Drugs ◽  
2019 ◽  
Vol 17 (8) ◽  
pp. 435 ◽  
Author(s):  
Hope A. Igboeli ◽  
Douglas H. Marchbank ◽  
Hebelin Correa ◽  
David Overy ◽  
Russell G. Kerr
Keyword(s):  
Natural Products ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Osmotic Stress ◽  
Hydroxamic Acid ◽  
High Performance ◽  
Flash Chromatography ◽  
Suberoylanilide Hydroxamic Acid ◽  
Biosynthetic Genes ◽  
Isolation And Characterization

Advances in whole-genome sequencing of many fungal species has revealed the presence of numerous “silent” biosynthetic genes, highlighting their potential to produce a wide variety of natural products. These silent biosynthetic genes are regulated in part by their highly condensed chromatin structure, which can be modified to allow transcription in response to external stimuli. In this study, Asteromyces cruciatus was subjected to both epigenetic modification and osmotic stress to enhance the production of new natural products. This “cooperative induction” strategy led to the isolation and characterization of two new polyketides from a fermentation of A. cruciatus treated with suberoylanilide hydroxamic acid and sodium chloride. The metabolic profiles of the control and treated samples were assessed using ultra-high performance liquid chromatography high-resolution electrospray ionization mass spectrometry (UHPLC-HRESIMS) metabolomic analysis, highlighting the upregulation of two new polyketides, primarolides A and B. These compounds were purified using reversed-phase flash chromatography followed by high-performance liquid chromatography, and their planar structures were established using NMR spectroscopy.

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