Moringa oleifera seed oil extracted by pressurized n-propane and its effect against Staphylococcus aureus biofilms

Chemical composition and antimicrobial activity of the essential oil of Lumnitzera racemosa Willd

Lumnitzera racemosa Willd is a medicinal species that supports the treatment of certain conditions. This is the first study on the chemical composition and antimicrobial activities of the essential oil from Lumnitzera racemosa Willd bark. This essential oil was extracted by the hydrodistillation method and analysed by gas chromatography (GC), and gas chromatography coupled with mass spectrometry (GC-MS). The results showed that the essential oil contains twenty-four compounds, the main of which are palmitic acid, nonacosane, and heptacosane. The antimicrobial activities of the essential oil against Pseudomonas aeruginosa, and Staphylococcus aureus had inhibition zones ranging from approximately 8.4-17.5 mm. This study has enhanced the understanding of the composition, and antimicrobial activities of L. racemosa and expanded its potential applications in the medical field.

Simultaneous extraction of sunflower oil and active compounds from olive leaves using pressurized propane

Sunflower is grown in different parts of the world and oil from the grain has many uses, including cosmetics and food. Olive leaves are rich in active compounds with potential for industrial use. The simultaneous extraction of raw materials is an economical and sustainable way of using the same extraction process to obtain products with high added value. The aim of this work was to promote the incorporation of bioactive compounds from olive leaves in sunflower oil by two extraction techniques: pressurized propane (PRO) and Soxhlet (SOX) and to evaluate the increase in oxidative stability and antioxidant activity of oils. The techniques used were useful in producing sunflower oil incorporating olive leaf extract (SFO + OLE); 4.3% 1-octacosanol and 5.8% 1-triacontanol were incorporated, and β-sitosterol increased by at least 90%. Also, SFO + OLE showed an increase in the induction time of 2.7 and 3.7 h compared to SFO for the PRO and SOX methods, respectively. The profile of fatty acids was maintained, with the majority in all samples being oleic and linoleic acids. Consequently, with this procedure is possible to produce SFO + OLE with better antioxidant activity and better nutritional characteristics using PRO and SOX. The scaled-up of the simultaneous extraction process via pressurized propane is economically viable according to the process simulation and economic evaluation.