* Author for correspondence and reprint requests Z. Naturforsch. 54c, 698-703 (1999); received November 17, 1998/March 20. 1999 a-Tocopherol, Photosynthesis, Drought, Rosmarinus officinalis, Melissa officinalis Summer diurnal variations of photosynthesis and a-tocopherol content were measured in relation to natural drought in field-grown rosemary (Rosmarinus officinalis L.) and lemon balm (Meli...

Rosmarinus officinalis L. (synonym Salvia rosmarinus Schleid) grows in the Mediterranean basin and is known to be a source of natural bioactive compounds one most important aromatic species terms marketing essential oil. However, wild collection lack selection lead absence standardized material that ensures homogeneity quality oils over time. In present work, thirteen Spanish populations rosema...

A comparative study was made between the acaricidal activities of some essential oils: rosemary (Rosmarinus officinalis L.), lavandula (Lavandula angustifolia Mill.), thyme (Thymus vulgaris L.) and ziziphora (Ziziphora clinopodioides Lam.) on the important mite pest, Tetranychus cinnabarinus Boisduval, the carmine spider mite, oncut roses during 2010-2012. The sublethal concentrations of ziziph...

ABSTRACT: Essential oils are commonly used to treat minor health problems. In this study the chemical compositions of Lavandula officinalis and Thymus vulgaris were determined by gas chromatography and mass spectrometry. GC/MS analysis of T. vulgaris resulted in thymol as the major oil component where as methyl sulfony exhibited as the most abundant constituent of L. officinalis. The antibacter...

Herbs and spices have been used since ancient times to improve the sensory characteristics of food, to act as preservatives and for their nutritional and healthy properties. Herbs and spices are generally recognized as safe (GRAS) and are excellent substitutes for chemical additives. Essential oils are mixtures of volatile compounds obtained, mainly by steam distillation, from medicinal and aro...

A piezoelectric 10 MHz multichannel quartz crystal microbalance (MQCM), coated with six molecularly imprinted polystyrene artificial recognition membranes have been developed for selective quantification of terpenes emanated from fresh and dried Lamiaceae family species, i.e., rosemary (Rosmarinus Officinalis L.), basil (Ocimum Basilicum) and sage (Salvia Officinalis). Optimal e-nose parameters...

Rosemary (Rosemarinus officinalis L.) is a well-known medicinal and essential oil plant, utilized by humankind since ancient times. The objective was to determine the effect of steam distillation time (DT) and material (dry or fresh biomass) on essential oil yield, composition, and bioactivity; and to develop regression models that can predict oil yield and composition at specific DT. The oil y...