The baobab, Adansonia digitata L., plays an important role in the economy of local populations. Nowadays, baobab seed oil is highly prized for its many cosmetic and therapeutic applications, and for its composition of...The baobab, Adansonia digitata L., plays an important role in the economy of local populations. Nowadays, baobab seed oil is highly prized for its many cosmetic and therapeutic applications, and for its composition of unsaturated fatty acids, sterols, and tocopherols. However, it undergoes numerous reactions during production, processing, transport, and storage, leading to undesirable products that make it unstable. The aim of this study was to provide local processors with innovative solutions for the treatment of unrefined vegetable oils. To this end, an experimental device for filtering crude oil on activated carbon made from fruit capsules was designed. The results obtained after the treatment show a significant decrease at (p < 5%) in acid value (1.62 to 0.58 mg KOH/g), peroxide value (4.40a to 0.50c mEqO<sub>2</sub>/Kg), chlorophyll concentration (1.81 to 0.50 mg/Kg) and primary and secondary oxidation products. According to these results, activated carbon’s adsorptive power eliminates oxidation products and certain pro-oxidants such as chlorophyll, resulting in a cleaner, more stable and better storable oil.展开更多
Parkia biglobosa is a non-wood forest product whose resources are used in food and pharmacopoeia. The pulp has interesting nutritional qualities. African locust bean fruits harvested in Senegal are characterised by lo...Parkia biglobosa is a non-wood forest product whose resources are used in food and pharmacopoeia. The pulp has interesting nutritional qualities. African locust bean fruits harvested in Senegal are characterised by low moisture (9.78% to 12.31%), which is crucial for long storage. The pulp is slightly acidic (pH = 4.84 to 5.16). It is also very rich in sugar, with a minimum concentration of 30.8g/100g, and is mainly made up of reducing sugars. Carotenoids are abundant in the pulp (on average 16.75 mg/100 g) and β-carotene is the main carotenoid. As for minerals, K and Mg are the most abundant, with average concentrations of 451.33 mg/100 g and 300.67 mg/100 g respectively. In addition, heavy metals such as arsenic, lead and cadmium are below the detection threshold (<0.002 mg/100 g) and are present in the pulp at a concentration below the standard set by the Codex Alimentarius. The organic acid profile was also determined, showing that citric acid (average 1131.88 mg/100 g) is the predominant organic acid in the pulp. Principal component analysis (PCA) revealed that the pulp of Parkia fruits harvested in Senegal was homogeneous in terms of physico-chemical and biochemical characteristics, despite a few differences.展开更多
The evolution of some quality markers of baobab (Adansonia digitata L.) was studied. Baobab oil extracted by pressing was packaged in 30 mL non-amber glass bottles and stored at different temperatures: 20°C, 30&#...The evolution of some quality markers of baobab (Adansonia digitata L.) was studied. Baobab oil extracted by pressing was packaged in 30 mL non-amber glass bottles and stored at different temperatures: 20°C, 30°C and 45°C. The physicochemical parameters (acid, peroxide, iodine, saponification, refraction and color indices) were determined during three months’ storage. A significant 5% increase in acid, peroxide and saponification value was observed over time. However, the iodine value decreased. The yellowing and refractive index remained stable while storage at 45°C caused the most significant changes in chemical parameters. The results obtained show that oils stored at 20°C had the lowest acid (2.42 ± 0.26 mg KOH/g) and peroxide (0.82 ± 0.25 mEqO<sub>2</sub>/Kg) value after three months of follow-up.展开更多
In this study, the effect of extraction processes on the physicochemical characteristics and antioxidant potential of baobab (Adansonia digitata L.) seed oil was evaluated. The oils were extracted, on the one hand, by...In this study, the effect of extraction processes on the physicochemical characteristics and antioxidant potential of baobab (Adansonia digitata L.) seed oil was evaluated. The oils were extracted, on the one hand, by cold pressing, and on the other hand, with three types of organic solvents (acetone, chloroform, n-hexane). The recorded results indicated that the extraction yield of baobab oil was significantly impacted by both the extraction method and the polarity of the solvent used. In addition, chloroform provides the best extraction yield (40.12 ± 0.607). However, extraction by cold pressure preserves at best the physicochemical and bioactive properties of the extracted oils. Indeed, the pressing oil contains a content of phenolic compounds (0.047 ± 0.0024 mgEAG/g of oil) and a very high radical scavenging activity (DPPH) (31.71% ± 0.61%). For the various oils extracted, the minimum and maximum values were 0.50 and 3.17 mEq?kg-1;56.26 and 99.113 mgI2?100 g-1;1.457 and 1.465;205.37 and 233.587 mgKOH/g respectively for the peroxide, iodine, refractive and saponification values. The color parameters (L*, a* and b*) of the oils also differ depending on the nature of the organic solvent used. Principal component analysis (PCA) and correlation analysis were performed on the physicochemical properties and the antioxidant potential of the extracted oils. Therefore, the results suggest the mixed use of acetone and hexane to obtain oil comparable to that extracted by cold pressing.展开更多
文摘The baobab, Adansonia digitata L., plays an important role in the economy of local populations. Nowadays, baobab seed oil is highly prized for its many cosmetic and therapeutic applications, and for its composition of unsaturated fatty acids, sterols, and tocopherols. However, it undergoes numerous reactions during production, processing, transport, and storage, leading to undesirable products that make it unstable. The aim of this study was to provide local processors with innovative solutions for the treatment of unrefined vegetable oils. To this end, an experimental device for filtering crude oil on activated carbon made from fruit capsules was designed. The results obtained after the treatment show a significant decrease at (p < 5%) in acid value (1.62 to 0.58 mg KOH/g), peroxide value (4.40a to 0.50c mEqO<sub>2</sub>/Kg), chlorophyll concentration (1.81 to 0.50 mg/Kg) and primary and secondary oxidation products. According to these results, activated carbon’s adsorptive power eliminates oxidation products and certain pro-oxidants such as chlorophyll, resulting in a cleaner, more stable and better storable oil.
文摘Parkia biglobosa is a non-wood forest product whose resources are used in food and pharmacopoeia. The pulp has interesting nutritional qualities. African locust bean fruits harvested in Senegal are characterised by low moisture (9.78% to 12.31%), which is crucial for long storage. The pulp is slightly acidic (pH = 4.84 to 5.16). It is also very rich in sugar, with a minimum concentration of 30.8g/100g, and is mainly made up of reducing sugars. Carotenoids are abundant in the pulp (on average 16.75 mg/100 g) and β-carotene is the main carotenoid. As for minerals, K and Mg are the most abundant, with average concentrations of 451.33 mg/100 g and 300.67 mg/100 g respectively. In addition, heavy metals such as arsenic, lead and cadmium are below the detection threshold (<0.002 mg/100 g) and are present in the pulp at a concentration below the standard set by the Codex Alimentarius. The organic acid profile was also determined, showing that citric acid (average 1131.88 mg/100 g) is the predominant organic acid in the pulp. Principal component analysis (PCA) revealed that the pulp of Parkia fruits harvested in Senegal was homogeneous in terms of physico-chemical and biochemical characteristics, despite a few differences.
文摘The evolution of some quality markers of baobab (Adansonia digitata L.) was studied. Baobab oil extracted by pressing was packaged in 30 mL non-amber glass bottles and stored at different temperatures: 20°C, 30°C and 45°C. The physicochemical parameters (acid, peroxide, iodine, saponification, refraction and color indices) were determined during three months’ storage. A significant 5% increase in acid, peroxide and saponification value was observed over time. However, the iodine value decreased. The yellowing and refractive index remained stable while storage at 45°C caused the most significant changes in chemical parameters. The results obtained show that oils stored at 20°C had the lowest acid (2.42 ± 0.26 mg KOH/g) and peroxide (0.82 ± 0.25 mEqO<sub>2</sub>/Kg) value after three months of follow-up.
文摘In this study, the effect of extraction processes on the physicochemical characteristics and antioxidant potential of baobab (Adansonia digitata L.) seed oil was evaluated. The oils were extracted, on the one hand, by cold pressing, and on the other hand, with three types of organic solvents (acetone, chloroform, n-hexane). The recorded results indicated that the extraction yield of baobab oil was significantly impacted by both the extraction method and the polarity of the solvent used. In addition, chloroform provides the best extraction yield (40.12 ± 0.607). However, extraction by cold pressure preserves at best the physicochemical and bioactive properties of the extracted oils. Indeed, the pressing oil contains a content of phenolic compounds (0.047 ± 0.0024 mgEAG/g of oil) and a very high radical scavenging activity (DPPH) (31.71% ± 0.61%). For the various oils extracted, the minimum and maximum values were 0.50 and 3.17 mEq?kg-1;56.26 and 99.113 mgI2?100 g-1;1.457 and 1.465;205.37 and 233.587 mgKOH/g respectively for the peroxide, iodine, refractive and saponification values. The color parameters (L*, a* and b*) of the oils also differ depending on the nature of the organic solvent used. Principal component analysis (PCA) and correlation analysis were performed on the physicochemical properties and the antioxidant potential of the extracted oils. Therefore, the results suggest the mixed use of acetone and hexane to obtain oil comparable to that extracted by cold pressing.
