نتایج جستجو برای: dichloromethane
تعداد نتایج: 3044 فیلتر نتایج به سال:
Chemical investigation of the dichloromethane extract of the leaves of Artocarpus altilis yielded βsitosterol (1), unsaturated triglycerides (2), squalene (3), polyprenol (4), lutein (5) and unsaturated fatty acids. The structures of 1-5 were identified by comparison of their 1 H and/or 13 C NMR data with those reported in the literature. Chemical investigation of the dichloromethane extract of...
Constituents from Polyalthia cerasoides, stem bark methanol extract, were previously documented. This study reports the first isolation of bioactive N-(4-hydroxy-β-phenethyl)-4-hydroxycinnamide (1) from ethyl acetate extract of the plant species including stigmasterol and a mixture of triterpenes from hexane and dichloromethane extracts. Trace essential elements were found in the hexane extract...
A simple, efficient and highly functional group compatible method for the synthesis of propargylamines from terminal alkynes, dichloromethane and tertiary amines using silver catalysts has been developed.
Background: The emergence of antimalarial drug resistance is one of the great problems of malaria control and elimination of worldwide. In order to overcome anti-malarial drug resistance, cytotoxicity and in vivo anti-Plasmodiumal activity of four different Iranian propolis were investigated. Materials and Methods: Four Iranian propolis samples were collected from four different regions o...
PCET is reported for free-base meso-(pyridyl)porphyrins, a pure organic system in dichloromethane solution, by employing UV/Vis and fluorescence spectroscopic techniques.
Tropical tunas are largely consumed worldwide, providing major nutritional benefits to humans, but also representing the main exposure methylmercury, a potent neurotoxin that biomagnifies along food webs. The combination of ecological tracers (nitrogen and carbon stable isotopes, ?15N ?13C) mercury concentrations in is scarce yet crucial better characterize influence tuna foraging ecology on bi...
We examined the harmful side effects on indigenous soil microorganisms of two organic solvents, acetone and dichloromethane, that are normally used for spiking of soil with polycyclic aromatic hydrocarbons for experimental purposes. The solvents were applied in two contamination protocols to either the whole soil sample or 25% of the soil volume, which was subsequently mixed with 75% untreated ...
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