164 research outputs found
Oleaster Oil Positively Modulates Plasma Lipids in Humans
No full textThe olive tree had been domesticated during the early Neolithic in the Near East, and more than 1000 different cultivars have been identified to date. However, examples of wild olive trees (Olea europaea oleaster) can still be found in the Mediterranean basin. Evidence of oleaster use for oil production can be found in historical and sacred texts, such as the Odyssey, the Holey Koran, and the Holey Bible. While the nutritional and healthful properties of olive oil are actively being explored, there are no data on the human actions of oleaster oil. Therefore, we investigated the effect of prolonged, i.e., 1 month, consumption of oleaster oil on the lipid profile of a 40 healthy Algerian subjects (aged 27.9 +/- 3.85 years), as compared to nonconsumers from the same area. Plasma urea, creatinine, and uric acid concentrations and glycemia did not significantly differ, at the end of the study, between controls and oleaster-oil-supplemented subjects. Conversely, we recorded significant decreases of plasma triglyceride concentration (-24.8%; p < 0.05), total cholesterol (-12.13%; p < 0.05), and low-density lipoprotein-cholesterol (LDL-C) (-24.39%; p < 0.05) in oleaster-oil-treated subjects. Concomitantly, high-density lipoprotein-cholesterol (HDL-C) concentrations were significantly increased (17.94%; p < 0.05) by oleaster oil administration. In conclusion, we show that oil obtained from feral olive trees, i.e., oleasters, improves the plasma lipid profile of healthy volunteers
Omega-3 Extraction from Anchovy Fillet Leftovers with Limonene: Chemical, Economic, and Technical Aspects
No full textWe investigate selected chemical, technical, and economic aspects of the production of fish oil rich in polyunsaturated omega-3 fatty acids from anchovy filleting leftovers using d-limonene as the extraction solvent at ambient temperature and pressure. Entirely derived from the orange peel prior to orange squeezing for juice production, the bio-based solvent is easily recovered, affording a circular economy process with significant potential for practical applications
High voltage electrical discharges as an alternative extraction process of phenolic and volatile compounds from wild thyme (Thymus Serpyllum l.) : in silico and experimental approaches for solubility assessment
No full textThe objective of this study was to evaluate the potential of green solvents for extractions of bioactive compounds (BACs) and essential oils from wild thyme (Thymus serpyllum L.) using theoretical and experimental procedures. Theoretical prediction was assessed by Hansen solubility parameters (HSPs) and conductor-like screening model for realistic solvents (COSMO-RS), to predict the most suitable solvents for extraction of BACs. An experimental procedure was performed by nonthermal technology high voltage electrical discharge (HVED) and it was compared with modified conventional extraction (CE). Obtained extracts were analyzed for chemical and physical changes during the treatment. Theoretical results for solution of BACs in ethanol and water, as green solvents, were confirmed by experimental results, while more accurate data was given by COSMO-RS assessment than HSPs. Results confirmed high potential of HVED for extraction of BACs and volatile compounds from wild thyme, in average, 2.03 times higher yield of extraction in terms of total phenolic content was found compared to CE. The main phenolic compound found in wild thyme extracts was rosmarinic acid, while the predominant volatile compound was carvacrol. Obtained extracts are considered safe and high-quality source reach in BACs that could be further used in functional food production
High Yields of Shrimp Oil Rich in Omega-3 and Natural Astaxanthin from Shrimp Waste
No full textA valued marine oil rich in omega-3 lipids and natural astaxanthin is obtained with remarkably high yield (up to 5 wt %) extending to pink shrimp waste (head and carapace) using the approach to extract fish oil from fish processing byproducts using d-limonene. Biobased limonene is an excellent solvent for both unsaturated lipids and astaxanthin-based carotenoids preventing oxidative degradation during the extraction cycle including solvent separation at 85 °C. Explaining the deep red color of the shrimp oil obtained, computational simulation suggests that d-limonene is also a good solvent for natural astaxanthin abundant in shrimp
Microwave-ultrasound combined reactor suitable for atmospheric sample preparation procedure of biological and chemical products
No full textA compact apparatus in which a specific position can be irradiated by microwaves (MW) and ultrasound (US) simultaneously has been developed. The MW-US reactor has been designed for atmospheric pressure digestion and dissolution of biological and chemical products. The reactor can treat a range of throughputs of 0.1 to 10 grams of a liquid or solid sample. Its application in analytical chemistry has been shown by two examples where decreases in digestion and dissolution time were demonstrated: determination of copper in olive oil and dissolution of refractory mineral material Co3O4. Simultaneous microwave and ultrasound irradiation is shown as a new technique for atmospheric pressure digestion and dissolution of solid and liquid samples suitable for chemical and biological analysis
Contribution of microwaves or ultrasonics on carvone and limonene recovery from dill fruits
No full textThe objective of this study is to investigate alternative preparation techniques such as microwave and ultrasoundfor the recovery and evaluation of carvone and limonene from flaked dill fruits (Anethum graveolens L.).The study indicates that microwave-assisted extraction using hexane is highly recommended to reveal the correctamount of carvone and limonene in dill fruits. In this respect,when hexane is used, microwave-assisted systemgives a better carvone yield of 29.96 mg/g compared to 24.54 and 23.49 mg/g for ultrasound andmaceration (control) methods respectively. Furthermore, systems using hexane are able to recover highamount of limonene as opposite to systems using water where extracts are characterised by an absence offree fatty acids and a high abundance of carvone translated by high carvone/limonene ratio especially in microwaves(22.88) and ultrasound (6.55). These findings suggest that the intervention of microwaves or ultrasonicsenhances extraction selectivity for carvone but have no great effect on limonene recovery.Although the recovered quantity of carvone in water extracts is much lower than the system using hexane dueto low solubility of carvone inwater, the advantages of using a GRAS solvent such as water are evident. It allowsextracts to be readily available for spray application on potatoes' storage. In addition, the proposed enhancementinvolving ultrasound pre-treatment has helped in increasing carvone yield and has the advantage to beeasily implemented on existing extraction processes.Industrial relevance: Our study shows that newtechnologies such as ultrasound andmicrowaves offer importantadvantages over conventional methods, such as shorter extraction time, energy saving and selectivity. Furthermore,the pretreatment of samples with ultrasound stands an intelligent tool to enhance extraction yields withoutjeopardising selectivity. Those aspects are of primary importance for industry to reduce cost and bringgreener routes to their established processes.In another aspect, the application of the proposed tandem method involving ultrasonics and water as a solventwould contribute to the creation of a niche market for hydrocarbon-free products, which are very soughtafter from exigent clients.In addition, the results indicate also that water gives valuable advantages in terms of safety, cleanliness and adoptionif we decide to generalise its use at an industry scale for carvone recovery. On top of that, usingwater as solventinmicrowaves or ultrasound systems produces extracts rich in carvone, offering a product thatmay be used on potatostorage on products for example having Bio or Organic labels without hindering their stringent regulations. Furthermore,the use of the produced carvone directly as a spray would not influence the perception of people ascarvone represents also the major compound on the widely used condiment Carum carvi L
We’ve Come a Long Way, Baby: Announcing a Special Issue to Commemorate the Publication of Molecule’s 20,000th Paper
No full textOn behalf of my Section Editor-in-Chief co-author colleagues I am pleased to announce a Special Issue to commemorate the recent publication of Molecules’ 20,000th paper [...
An original microwave-ultra violet combined reactor suitable for organic synthesis and degradation
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