Results 71 to 80 of about 225,386 (346)
Binding Parameters of Alkaloids Berberine and Sanguinarine with DNA [PDF]
Ukr.J.Phys., 2011, v.56, N2, p.524-533, 2012 We study the interaction of berberine and sanguinarine (plant alkaloids) with DNA in aqueous solutions, by using optical spectroscopy methods (absorption and fluorescence). The dependencies of alkaloid spectral characteristics on the concentration ratio N/c between the DNA base pairs and alkaloid molecules in the solutions are considered, and the ...
arxiv
Specialist or generalist? Feeding ecology of the Malagasy poison frog Mantella aurantiaca [PDF]
, 2007 We studied the diet of a population of free-ranging Mantella aurantiaca, an alkaloid-containing poison frog from Madagascar. As in other poison frogs, this species is thought to sequester alkaloids from arthropod prey.
Fisher, Brian L. +5 more
core
Network-analysis-guided synthesis of weisaconitine D and liljestrandinine. [PDF]
, 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
A Simple LC–MS Method for the Quantitation of Alkaloids in Endophyte-Infected Perennial Ryegrass
Toxins, 2019 The rapid identification and quantitation of alkaloids produced by Epichloë endophyte-infected pasture grass is important for the agricultural industry.
Simone Vassiliadis +5 more
doaj +1 more source
Molecular geometry of alkaloids present in seeds of mexican prickly poppy [PDF]
arXiv, 2015 The work is a study of the geometry of the molecules via molecular mechanics of the main alkaloids found in the seeds of Argemone Mexicana Linn, a prickly poppy, which is considered one of the most important species of plants in traditional Mexican and Indian medicine system.
arxiv
Prolongation of AV nodal refractoriness by Ruta graveolens in isolated rat hearts [PDF]
, 2008 Objectives: To evaluate concentration-dependent effects of total extract of Rusta graveolens and its purified alkaloid fraction on the nodal basic and functional properties.
Golalipour, M.J. +4 more
core
Angewandte Chemie, EarlyView.Die Verwendung von Ammoniak in Kombination mit Hypochloriten als einfache Oxidationsmittel unter Phasentransferbedingungen ermöglicht die direkte oxidative α‐Aminierung von reaktiven Enolatvorstufen wie cyclischen β‐Ketoestern, Oxindolen sowie Malonitrilen und Malonaten in guten bis exzellenten Ausbeuten.
Christopher Mairhofer +6 more
wiley +1 more source
Evolution through time of Pyrrolizidine Alkaloids detection and quantification [PDF]
arXiv, 2013 Pyrrolizidine Alkaloids (PAs) are a group of naturally occurring alkaloids that are produced by plants as a defense mechanism against insect herbivores. The analytical methodologies employed for their detection have come a long way since the first analytical experiment and in the last 30 years had an enormous development, both technological and ...
arxiv
Total Synthesis and Structural Revision of the Alkaloid Incargranine B [PDF]
, 2013 Seeing double: Consideration of the biosynthetic origins of incargranineB, which was originally assigned an unprecedented indolo[1.7]naphthyridine structure, led to the proposal of a dipyrroloquinoline framework as a more biosynthetically feasible ...
Bates +8 more
core +1 more source
Marine Drugs, 2019 Non-melanoma skin cancer is one of the major ailments in the United States. Effective drugs that can cure skin cancers are limited. Moreover, the available drugs have toxic side effects.
Jaden Cowan +5 more
doaj +1 more source