HPLC-DAD coupled with mass spectrometry in the positive ionization mode was applied to study the fragmentation of twelve selected flavonoids. Compounds belonging to all the major subgroups found in common plants, i.e. flavonols, flavones, dihydroflavonols, flavanones and flavanols were studied. Compound standards were injected into the spectrometer and produced characteristic mass spectra. The ...

background: in current study, chemical composition and antibacterial activity of leaves and flowers essential oils of origanum vulgare ssp. gracile against four food-borne pathogens including  escherichia coli, listeria monocytogenes, salmonella thyphimurium and staphylococcus aureus were examined. methods: the different organs (leaves and flowers) of o. vulgare ssp. gracile were harvested at f...

O presente projeto procurou produzir produtos semi-sintéticos orgânicospreferencialmente que possuam atividade biológica, através de reações click,utilizando como composto partida o timol, carvarol e eugenol. Os compostos estãopresentes nos óleos essenciais extraídos do orégano ( Origanum Vulgare ) tanto parao quanto carvacrol cravo da índia Eugenia caryophyllata para Osderivados foram produzid...

Twenty seven essential oils, isolated from plants representing 11 families of Portuguese flora, were screened for their nematicidal activity against the pinewood nematode (PWN), Bursaphelenchus xylophilus. The essential oils were isolated by hydrodistillation and the volatiles by distillation-extraction, and both were analysed by GC and GC-MS. High nematicidal activity was achieved with essenti...

Origanum vulgare L., the most complex and variable species of genus Origanum, is used to cure various diseases in traditional medicinal system. In current investigation, O. was collected from its natural origin further multiplied for two years at experimental farm DIBER field station, Auli, afterwards, it grown three different altitudes, i.e., station Auli (2744 m), Pithoragarh (1524 Haldwani (...

(+)-cis-Sabinene hydrate and (+)-trans-sabinene hydrate are the main monoterpenes found in marjoram (Origanum majorana), but can also be found in other Origanum species as well, as in e.g. Melaleuca alternifolia. The synthesis of sabinene hydrate in marjoram (Origanum majorana) is performed by sabinene hydrate synthase. It is claimed, that both, (+)-cis- and (+)-trans-sabinene hydrate are produ...

The current study aimed to investigate the antihyperglycaemic effect of aqueous extract of Origanum vulgare (oregano, OV) leaves in streptozotocin (STZ) induced diabetic rat. Streptozotocin induced diabetic rats showed significant (P < 0.05) increase in the levels of blood glucose, glycosylated haemoglobin, pancreatic amylase, liver and kidney weights /body weight ratios, urea, uric acid, creat...