Results 21 to 30 of about 232,220 (312)

Fast and selective HPLC-DAD method for determination of pholcodine and related substances

open access: yesMacedonian Journal of Chemistry and Chemical Engineering, 2011
Quality control of pharmaceuticals requires development of fast, efficient and reliable methods for determination of active compounds as well as known and very often unknown impurities within defined concentration ranges. In this work, a simple and rapid
Ana Petkovska   +2 more
doaj   +1 more source

Herbal highs: review on psychoactive effects and neuropharmacology [PDF]

open access: yes, 2017
Background: A new trend among users of new psychoactive substances’ the consumption of “herbal highs”: plant parts containing psychoactive substances.
Graziano, S   +5 more
core   +1 more source

The Relationship between Structurally Different Pyrrolizidine Alkaloids and Western Flower Thrips Resistance in F2 Hybrids of Jacobaea vulgaros and Jacobaea aquatica [PDF]

open access: yes, 2011
Segregating plant hybrids often have more ecological and molecular variability compared to parental species, and are therefore useful for studying relationships between different traits, and the adaptive significance of trait variation.
Cheng, D.   +4 more
core   +4 more sources

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  

Piperine Reduces Neoplastic Progression in Cervical Cancer Cells by Downregulating the Cyclooxygenase 2 Pathway

open access: yesPharmaceuticals, 2023
Cervical cancer is the fourth-most common type of cancer in the world that causes death in women. It is mainly caused by persistent infection by human papillomavirus (HPV) that triggers a chronic inflammatory process.
Luana Pereira Cardoso   +8 more
doaj   +1 more source

Validation of analytical method for determination of microbiological quality of antifungal shampoo containing 2% ketoconazole: Enumeration test and tests for specified microorganisms (Method suitability test) [PDF]

open access: yesMakedonsko Farmacevtski Bilten
Microbiological quality screening of non - sterile product is conducted by suitable enumeration tests and tests for absence of specified microorganisms. The European Pharmacopoeia offers several methods for conducting these tests.
Nadica Gjurichikj   +5 more
doaj   +1 more source

Canadine synthase from Thalictrum tuberosum cell cultures catalyses the formation of the methylenedioxy bridge in berberine synthesis [PDF]

open access: yes, 1994
An enzyme system catalysing the formation of the methylenedioxy bridge at ring A of (S)-canadine [ = (S)-tetrahydroberberine] from (S)-tetrahydrocolumbamine has been detected in microsomal preparations from different Ranunculaceae and Berberidaceae cell ...
Rüffer, Martina, Zenk, Meinhart H.
core   +2 more sources

Network-analysis-guided synthesis of weisaconitine D and liljestrandinine. [PDF]

open access: yes, 2015
General strategies for the chemical synthesis of organic compounds, especially of architecturally complex natural products, are not easily identified. Here we present a method to establish a strategy for such syntheses, which uses network analysis.
Gallego, GM   +8 more
core   +2 more sources

Marine Organisms as Alkaloid Biosynthesizers of Potential Anti-Alzheimer Agents

open access: yesMarine Drugs, 2022
The incidence of neurodegenerative diseases, such as Alzheimer’s disease (AD), increases continuously demanding the urgent development of anti-Alzheimer’s agents.
Elisabete Lima, Jorge Medeiros
doaj   +1 more source

Chemical defenses of the Caribbean sponges Agelas wiedenmayeri and Agelas conifera [PDF]

open access: yes, 2000
Previous studies have determined that Caribbean reef sponges of the genus Agelas are chemically defended from fish predation by brominated pyrrole alkaloids, and that the compounds responsible for this defense have been elucidated for one species, Agelas
Assmann, M.   +3 more
core   +1 more source

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