Mojtaba Yazdani; Masomeh Khosravi; Akram Ahmadi
Abstract
Many algae produce large amounts of oil that can be converted to biodiesel. To study the lipid production, Chlorella vulgaris, Scenedesmus obliqus and Spirulina platensis were selected. Samplings from different regions were done and cultivated in suitable condition. Based on results, the lowest amount ...
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Many algae produce large amounts of oil that can be converted to biodiesel. To study the lipid production, Chlorella vulgaris, Scenedesmus obliqus and Spirulina platensis were selected. Samplings from different regions were done and cultivated in suitable condition. Based on results, the lowest amount of saturated fatty acids was observed in the Chlorella vulgaris (21.79%). Lauric acid (C12:0), Meristic acid (C14:0), Penta-dicyclic acid (C15:0), Palmitic acid (C16:0) and Stearic acid (C18:0) were observed in all species in different amount. The greatest amount of unsaturated fatty acid was observed in Chlorella vulgaris. The diversity of fatty acids were different among species. Most of the diversity of fatty acids were observed in Scenedesmus obliqus with 22 fatty acids while that was 12 and 10 in Chlorella vulgaris and Spirulina platensis respectively. The highest amount of EPA and DHA saturated fatty acids were observed in Scenedesmus obliques. The greatest amount of unsaturated fatty acids belongs to the Linolenic acid (C18: 3). The greatest amount of 2-bands unsaturated fatty acid were observed in Spirulina platensis with 18.6%. The greatest amount of 3-bands unsaturated fatty acid were observed in Chlorella vulgaris was measured at 48.53%. 4-bands unsaturated fatty acids were observed only in Scenedesmus obliques. Most of fatty acids composition in studied microalgae were unsaturated fatty acids types.
Masoumeh Borjian; Maryam Khoshsokhan Mozaffar; Masoumeh khosravireyneh
Abstract
Purpose of this study is determine the effect of cadmium on some oxidative stress factors in Brassica oleracea l. cv. saccata in a random pattern & repeated 3 times. in order to control experimental conditions the same as the inhibitory effects of the other factors such as soil nutrition factors ...
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Purpose of this study is determine the effect of cadmium on some oxidative stress factors in Brassica oleracea l. cv. saccata in a random pattern & repeated 3 times. in order to control experimental conditions the same as the inhibitory effects of the other factors such as soil nutrition factors the hydroponic growth culture was used. The root and shoot samples picked up in 14th day after treatment with different cadmium concentration (0.5, 5) and used it for determination of biochemical and morphological parameters. The activity of Superoxide dismutase (SOD), Polyphenol Oxidase (PPO), catalase (CAT) and malondialdehyde in aerobiosis bodies and roots and also the content of Anthocyanin and chlorophyll a and b in shoots were measured. The results showed the activity of SOD in some aerobiosis bodies in 5 and 0.5 concentration of cadmium & also CAT enzyme activity in aerobiosis bodies with 5 concentration and in roots with 5 cadmium concentration has increased. The cadmium treatment have showed that PPO increased in 5 cadmium con. and also the decreased in 0.5 cadmium con., significantly, in aerobiosis bodies. The amount of Malondialdehyde as an index of proxidation membrance lipids has been decreased significantly in 0.5 con. in shoots. In caring plants with cadmium, Anthocyanin has decreased, significantly. The amount of a & b chlorophylls decreased in 5 concentration. Thus, the obtained results in this study have showed that cadmium has a positive effect on some antioxidant system parameters of the plant in the oxidative stress conditions & regarding that in the most cadmium have never seen any significant root in the data, we can conclude the cadmium conducts from the root to shoot.
