Determination of Some chemical composition of Dog Rose fruit and seed

In order to determination of active compounds such as total phenol and carotenoid contents, and to asses amount of fruit seed oil and its fatty acids composition Dog Rose fruits (Rosa Canina L.) were picked from 4 various ecological regions in Zanjan province in Iran (Zanjan, Tarom, Abhar and Mahneshan) when the fruits were completely developed. Mentioned variable were analyzed with spectrometry, soxhlet and gas chromatography methods, respectively.
The results showed that the total amount of phenolic and carotenoid contents varied by ecological factors; with the highest and lowest phenolic values containing 95.30±0.52 and 84.23±0.33 mg of Gallic Acid per gram of dried fruit, from Zanjan and Abhar regions, respectively. The fruits picked from Abhar and Zanjan had the lowest values of carotenoids (aproximately208mg per 100 gr of dried fruit) while the fruits from Tarom showed the highest value (2.227±2.93 mg per 100 grams of dried fruit).
The amount of oil extracted from the Dog Rose fruit seeds was found as10.6% with the main fatty acids of linoleic, oleic, alpha linolenic, stearic and palmitic acids with different values in various ecological regions.