Results 21 to 30 of about 3,256 (222)

Mesostructured Silica-Coated Magnetic Nanoparticles to Extract Six Opium Alkaloids in Poppy Seeds Prior to Ultra-High-Performance Liquid Chromatography-Tandem Mass Spectrometry Analysis

open access: yesFoods, 2021
In recent years, health authorities have become increasingly concerned about preventing consumer exposure to opium alkaloids present in Papaver somniferum L. poppy seeds. In this study, a simple, rapid and efficient method has been optimised to determine
Gema Casado-Hidalgo   +3 more
doaj   +1 more source

Genetic and Phenotypic Analyses of a Papaver somniferum T-DNA Insertional Mutant with Altered Alkaloid Composition

open access: yesPharmaceuticals, 2012
The in vitro shoot culture of a T-DNA insertional mutant of Papaver somniferum L. established by the infection of Agrobacterium rhizogenes MAFF03-01724 accumulated thebaine instead of morphine as a major opium alkaloid.
Kayo Yoshimatsu   +3 more
doaj   +1 more source

Update of the Scientific Opinion on opium alkaloids in poppy seeds

open access: yesEFSA Journal, 2018
Poppy seeds are obtained from the opium poppy (Papaver somniferum L.). They are used as food and to produce edible oil. The opium poppy plant contains narcotic alkaloids such as morphine and codeine.
EFSA Panel on Contaminants in the Food Chain (CONTAM)   +32 more
doaj   +1 more source

Determination of alkaloids and oil rates of some poppy (papaver somniferum L.) varieties cultivated as winter and summer

open access: yesInternational Journal of Secondary Metabolite, 2017
The aim of this study is to determine the alkaloid and oil rates contents of some poppy (Papaver somniferum L.) varieties, such as morphine, codeine, oripavine, thebaine, noscapine and papaverine, which are planted as winter and summer. Five varieties of
Levent Yazıcı, Güngör Yılmaz
doaj   +1 more source

Functional diversity of 2-oxoglutarate/Fe(II)-dependent dioxygenases in plant metabolism [PDF]

open access: yes, 2014
Oxidative enzymes catalyze many different reactions in plant metabolism. Among this suite of enzymes are the 2-oxoglutarate/Fe(II)-dependent dioxygenases (2-ODDs). Cytochromes P450 (CYPs) as often considered the most versatile oxidative enzymes in nature,
Peter J. Facchini, Scott C. Farrow
core   +2 more sources

Direct Ambient Mass Spectrometry for Food, Beverage, and Agricultural Sample Analysis and Research

open access: yesMass Spectrometry Reviews, Volume 45, Issue 2, Page 429-452, March/April 2026.
ABSTRACT Ambient and direct mass spectrometry (MS) methods are becoming increasingly used for the rapid analysis of food, beverage and agricultural samples. Novel ionization approaches combined with targeted, or untargeted workflows provide analytical outcomes within a greatly reduced time period compared to traditional separation science coupled with ...
Leigh M. Schmidtke   +3 more
wiley   +1 more source

Electrosynthesis of Bioactive Chemicals, From Ions to Pharmaceuticals

open access: yesAdvanced Functional Materials, Volume 36, Issue 16, 23 February 2026.
This review discusses recent advances in electrosynthesis for biomedical and pharmaceutical applications. It covers key electrochemical materials enabling precise delivery of ions and small molecules for cellular modulation and disease treatment, alongside catalytic systems for pharmaceutical synthesis.
Gwangbin Lee   +4 more
wiley   +1 more source

Evaluation of the Transfer and Occurrence of Opium Alkaloids in Poppy Seed Teas Using Preconcentrations with µSPEed® Followed by GC-MS Analysis

open access: yesChemosensors, 2023
Intoxication due to the consumption of poppy seed teas has been reported due to their contamination with opium alkaloids (OAs). In this work, an efficient methodology based on microsolid-phase extraction (µSPEed®) followed by gas chromatography–mass ...
Gema Casado-Hidalgo   +4 more
doaj   +1 more source

Study of karyological characteristics in several accessions of Papaver bracteatum Lindl. [PDF]

open access: yesمجله بیوتکنولوژی کشاورزی, 2012
Iranian poppy (Papaver bracteatum Lindl.) is one of the most important medicinal plants which its main alkaloid is thebaine. In this study karyological characteristics of five accessions of Papaver bracteatum Lindl were investigated using Aceto-Iron ...
Reza Farjami Nezhad   +3 more
doaj   +1 more source

Variation of seed characteristic from natural and artificial selection in the genus Papaver [PDF]

open access: yes, 2015
Papaveraceae is a mediterranean plant family with an important scientific, commercial and ethnobotanical interest. Includes wild species, which are distributed throughout the Spanish territory, as Papaver rhoeas, P. dubium, P. bracteatum, P. hybridum and
Martín-Clemente, Elena   +1 more
core  

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