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Chemical composition of the essential oil of the aerial parts of Artemisia vulgaris L. (Asteracea), grown in Syria was determined by GC/MS. The oil obtained by hydrodistillation, was found to contain 55 components, accounting for 98.82 %.
The volatile oil of Anthemis wettsteiniana was studied in environmentally different regions distributed on five locations in the provinces of Homs and Hama, in order to determine the quantity and quality and effect of the surrounding environment, on the volatile oil specifications. The plants were gathered during tow phonological phases of the life of the plant included the vegetative growth stage- the full of flowering stage. It was then extracted through water extraction method. It was found that the highest percentage of volatile oil was recorded in Al-afif location at the full of the flowering stage during the 2013 season, where the percentage of the volatile oil was 0.12 (ml/100g) ,while the lowest percentage of volatile oil was recorded in Tal-snan during the 2014 season , the percentage of the volatile oil was 0.04 (ml/100g).
The volatile oil of Anthemis scariosa was studied in environmentally different regions distributed on five locations in the provinces of Homs and Hama, in order to determine the quantity and quality and effect of the surrounding environment, on th e volatile oil specifications. The plants were gathered during tow phonological phases of the life of the plant included the vegetative growth stage- the full of flowering stage. It was then extracted through water extraction method. It was found that the highest percentage of volatile oil was recorded in Al-hamra location at the full of the flowering stage during the 2013 season.
Chemical composition of the essential oil extracted by hydrodistillation (Clevenger apparatus) from some aerial parts (ripe and unripe fruit) of Pistacia Atlantica (Anacardiaceae) which are widely spread throughout the countries of the Mediterranea n Sea and have been occupying a good part of the mount of Syria was determined by Gas Chromatography-Mass Spectrometer GC/MS. The results of analyzing showed that the oil consist of five compounds in ripe and unripe fruit, and it was found that the component with the highest ratio in both samples is the same 2-methylbutanal and its ratio 95.713% in the ripe fruit and 94.138% in the unripe fruit. The results of this study also show that the essential oil components of the Syrian Pistacia fruits are completely different from those in different environments due to the different types of pistacia species which have been studied and the different environmental conditions in which this plant grows.
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