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Sunflower biodiesel
Use of P-DSC in the evaluation of antioxidant efficiency
]. In Brazil, the vegetable oils more commonly used for obtaining biodiesel are oils from soybean, castor bean fruit, sunflower, cotton, palm, and others [ 3 , 4 ]. The oxidation resistance is an important issue for the life cycle of biodiesel
Abstract
The extracts from sunflower and mustard leaves were separated using SPE-Columns. The mustard seeds were germinated on water (24 h) and subsequently on crude extracts or separate fractions. The heat production rate was measured by isothermal calorimetry at 21°C and changes in seed cotyledons by FT-Raman spectroscopy. Crude extracts strongly inhibited seed germination. The water and ‘methanol’ fractions of mustard and sunflower extracts have a similar influence on the pattern of heat efflux. FT-Raman spectroscopy showed that extracts caused changes in cotyledons mainly in the content of fatty acids, carotenoids and flavonoids. Isothermal calorimetry and Raman spectroscopy are useful for the study of allelopathic interactions.
advantages. Brazil included biodiesel in the agreements established in the Kyoto Protocol and in the guidelines of Clean Development Mechanisms [ 3 ] and cultivates several oleaginous species are cultivated, such as the soybean, castor, sunflower, and
oil. There is also an ongoing debate on the health properties of the food processed with different kinds of oil. Corn, olive, soybean and sunflower oils are products widely used in the cooking as seasoning or frying agent. Moreover, it can produce
-known plant which contains a lot of allelopathic components. Chemical studies of sunflowers have shown that in this plant several bioactive compounds are present: flavonoids [ 3 ], terpenoids [ 4 ], norsesquiterpenoids [ 5 ], sesquiterpene lactone [ 6 , 7
presents perpendicular straight channels (opening 6.7 × 6.7 Å) and tortuous channels (5.6 × 5.6 Å) [ 11 , 12 ]. In this context, the aim of this study was to investigate the thermogravimetric kinetics for the degradation of sunflower oil under the
. Hydrodecarbonylation and step-by-step catalytic hydrogenation of the carboxylic acid were distinguished as the main reaction routes of hydrocarbon formation. Now the previous study is extended for using a real vegetable oil (sunflower oil) over alumina supported
. Fatty acids contain from 8 to 24 carbons along the chain, with different degrees of unsaturation [ 1 ]. Vegetable oils have emerged as an alternative source for biofuel production. Several vegetable oils obtained from soybean, castor, sunflower, cotton
sources, as soy, cotton, sunflower, palm bean or simply oil of domestic fry. This is made through a chemical process called transesterification where by the glycerin is separated from the fat or vegetable oil. The process generates two products: methyl or
. Relations between the yield of sunflower and the characteristics of the cropyear. Cereal Res. Comm. 35. (2) 285–288. Chaney, R. L., 1982. Fate of toxic substances in sludge applied to cropland. In: Proc. Int. Symp
