Similarity analysis of essential oils and oleoresins of Eucalyptus globulus leaves produced by distinct methods, solvents and operating conditions

Rodrigues, Vítor H.; Melo, Marcelo M.R. de; Tenberg, Vico; Carreira, Rui; Portugal, Inês; Silva, Carlos M.

doi:10.1016/j.indcrop.2021.113339

Cited by 7 publications

(12 citation statements)

References 45 publications

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“…The IR spectrum from Figure 2 demonstrates the successful conjugation of EG molecules onto Fe 3 O 4 particles. The vibrational bands identified at~2928 cm −1 and~2848 cm −1 correspond to the asymmetric and symmetric stretching of -CH 3 originating from Eucalyptus essential oil [85], while the~558 cm −1 band is assigned to Fe-O stretching vibrations from magnetite [86,87].…”

Section: Resultsmentioning

confidence: 99%

MAPLE Coatings Embedded with Essential Oil-Conjugated Magnetite for Anti-Biofilm Applications

et al. 2021

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The present study reports on the development and evaluation of nanostructured composite coatings of polylactic acid (PLA) embedded with iron oxide nanoparticles (Fe3O4) modified with Eucalyptus (Eucalyptus globulus) essential oil. The co-precipitation method was employed to synthesize the magnetite particles conjugated with Eucalyptus natural antibiotic (Fe3O4@EG), while their composition and microstructure were investigated using grazing incidence X-ray diffraction (GIXRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and dynamic light scattering (DLS). The matrix-assisted pulsed laser evaporation (MAPLE) technique was further employed to obtain PLA/Fe3O4@EG thin films. Optimal experimental conditions for laser processing were established by complementary infrared microscopy (IRM) and scanning electron microscopy (SEM) investigations. The in vitro biocompatibility with eukaryote cells was proven using mesenchymal stem cells, while the anti-biofilm efficiency of composite PLA/Fe3O4@EG coatings was assessed against Gram-negative and Gram-positive pathogens.

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Section: Resultsmentioning

confidence: 99%

MAPLE Coatings Embedded with Essential Oil-Conjugated Magnetite for Anti-Biofilm Applications

et al. 2021

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“…In addition to the essential oil, it is possible to obtain oleoresin; however, it differs in physical and chemical terms in liquid form under environmental conditions, while oleoresin may contain waxes in solid or semi-solid form [ 74 ]. Soursop leaf oleoresin has bactericidal activity containing 22.7% of phytosterols as the main class of compounds [ 75 ].…”

Section: Food Products From Soursop By-productsmentioning

confidence: 99%

Soursop (Annona muricata) Properties and Perspectives for Integral Valorization

Santos

Rodrigues

Amante

et al. 2023

Foods

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The increased international interest in the properties of soursop (Annona muricata) alerts us to the sustainability of productive chain by-products, which are rich in phytochemicals and other properties justifying their industrial application in addition to reducing the environmental impact and generating income. Chemical characteristics of soursop by-products are widely known in the scientific community; this fruit has several therapeutic effects, especially its leaves, enabling it to be used by the pharmaceutical industry. Damaged and non-standard fruits (due to falling and crushing) (30–50%), seeds (3–8.5%), peels (7–20%), and leaves, although they constitute discarded waste, can be considered as by-products. There are other less cited parts of the plant that also have phytochemical components, such as the columella and the epidermis of the stem and root. Tropical countries are examples of producers where soursop is marketed as fresh fruit or frozen pulp, and the valorization of all parts of the fruit could represent important environmental and economic perspectives. Based on the chemical composition of the fruit as well as its by-products and leaves, this work discusses proposals for the valorization of these materials. Soursop powder, bioactive compounds, oil, biochar, biodiesel, bio-oil, and other products based on published studies are presented in this work, offering new ideas for opportunities for the regions and consumers that produce soursop.

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“…The temperature benefit to achieve maximum yield is not related to the boiling point of the solvent. For example, hexane and methanol have close boiling points (68.5 • C and 64.7 • C, respectively), while the yields are disparate [39].…”

Section: Total Extraction Yield Analysismentioning

confidence: 99%

Anthocyanins, Phenolic Compounds, and Antioxidants from Extractions of Six Eucalyptus Species

et al. 2021

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The leaves of Eucalyptus have multiple biological activities such as antimicrobial, antiseptic, antioxidant, and antifungal. A Soxhlet extraction, SLE, and HD were used to obtain extracts from the leaves of six Eucalyptus species, E. globulus, E. oblicua, E. pavaflora, E. camaldulensis, E. viminalis, and E. nitens, and to study their antioxidant capacity. Solvents such as acetone, dichloromethane, ethanol, hexane, methanol, and water were used to study how polarity influences extraction yields. The SLE method achieved higher or similar yields, depending on the species and its composition, than the Soxlet method at a temperature of 50 °C. The highest yields were obtained with E. viminalis with methanol (42.5 wt.%), the highest phenolic content was obtained with E. nitens with methanol (124.17 mg GAE/g of extract), and the highest anthocyanin levels obtained were with E. nitens with hexane (5.05 mg CC/g of extract). E. nitens obtained almost five times more phenolic content than E. globulus; therefore, it is the most promising species. The high content of the compounds analysed confirm the good potential of these species to obtain value-added compounds. Our results demonstrate that the differences in the extract contents depend on the polarity of the solvents used. In addition, the use of these species will reduce the residue in the forest, which is greatly beneficial.

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Similarity analysis of essential oils and oleoresins of Eucalyptus globulus leaves produced by distinct methods, solvents and operating conditions

Cited by 7 publications

References 45 publications

MAPLE Coatings Embedded with Essential Oil-Conjugated Magnetite for Anti-Biofilm Applications

MAPLE Coatings Embedded with Essential Oil-Conjugated Magnetite for Anti-Biofilm Applications

Soursop (Annona muricata) Properties and Perspectives for Integral Valorization

Anthocyanins, Phenolic Compounds, and Antioxidants from Extractions of Six Eucalyptus Species

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