Characteristics of Chia (Salvia hispanica L.) Seed Oil Extracted by Ultrasound Assistance

The aims of this work were to evaluate the effect of Ultrasound- Assisted Extraction (UAE) in oil yield, as well as in the physicochemical and chemical characteristics of Chia seed oil. The seeds were cryo ground before extraction; ultrasonic bath at 40 kHz was used during 90 min extraction process. The UEA resulted in intensification of the extraction, with 79.3% oil yield, while 69.2% were for stirring extraction. Diffusion coefficient´s values were 1.04x10-11 m2s-1 and 9.16x10-12m2s-1, respectively. From thermal analysis, made with MDSC, the main triacylglycerols (TAG´s) transitions were obtained. By ATR-FTIR, changes in the 987 and 968 cm-1 wave numbers, corresponding to the outside plane deformation of C-H bonds in unsaturated fatty acids, were obtained . The UEA could change the material properties by cavitation that enhances the mass transfer, but no oil composition.

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Effects of extraction solvent and time on the oil yield, total phenolic content, carotenoid and antioxidant activity of Australian chia seed (Salvia hispanica L.) oil

Food Research ◽

10.26656/fr.2017.4(s4).006 ◽

2020 ◽

Vol 4 (S4) ◽

pp. 27-37

Author(s):

I. Ishak ◽

M.A. Ghani ◽

J.Z. Yuen

Keyword(s):

Antioxidant Activity ◽

Seed Oil ◽

Phenolic Content ◽

Oil Yield ◽

Total Phenolic ◽

Seed Oils ◽

Extraction Solvent ◽

Chia Seed ◽

Chia Seed Oil ◽

Salvia Hispanica L

The oil yield, total phenolic content (TPC), total carotenoid content (TCC) and antioxidant activity of Australian chia seed (Salvia hispanica L.) oil under solvents polarity and extraction times were studied. The chia seed oils were obtained by using organic solvents in the Soxhlet method with different extraction times including acetone 4 hrs (A4), acetone 8 hrs (A8) and hexane 8 hrs (H8) as a control. The oil yield for the control sample (36.1%) showed significant (p ≤ 0.05) higher than A4 (33.53%) and A8 (33.73%). TPC for chia seed oil (A4) was significantly higher (p ≤ 0.05) than A8 and H8. Meanwhile, chia seed oil (A8) contained the highest TCC over A4 and H8. The antioxidant activity of chia seed oil was determined by DPPH (2-diphenyl-1-picrylhydrazyl) scavenging activity, FRAP (Ferric reducing antioxidant power assay), BCBA (Beta-carotene bleaching assay) and TBA (Lipid Peroxidation Inhibition Assay), respectively. Chia seed oil obtained by acetone extraction for 4 hrs revealed higher antioxidant capacities (DPPH, BCBA and TBA) compared to chia seed oils from A8 and H8. However, chia seed oil (H8) showed the lowest total (phenolic and carotenoid contents) and antioxidant capacities. The correlation between the antioxidant content and the antioxidant activities were conducted to determine their relationship. TPC and TCC were strongly correlated with BCBA (r = 0.999) and TBA (r = 0.997). The results found Australian chia seed oil extracted by acetone for 4 hrs (A4) had higher contents of phenolic and antioxidant activity than control (H8) due to high polarity of acetone to the antioxidant compounds. In conclusion, acetone can be applied as an alternative extraction solvent to increase the total phenolic and carotenoid contents as well as antioxidant activity of Australian chia seed oil.

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Research on Detecting Tris-(2,3-dibromopropyl)-Phosphate in Textiles with the HPLC/DAD Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.441.640 ◽

2012 ◽

Vol 441 ◽

pp. 640-644

Author(s):

Ke Jie Fu ◽

Li Sheng Yang ◽

Chang Sheng Feng ◽

Liang Chen

Keyword(s):

Limit Of Detection ◽

Extraction Process ◽

Ultrasound Assisted Extraction ◽

Routine Testing ◽

Assisted Extraction ◽

Ultrasound Assisted ◽

Pre Treatment ◽

Finishing Agent ◽

Detecting Method ◽

Precision Test

A detecting method for toxic flame retardant finishing agent tris-(2,3-dibromopropyl) -phosphate (TRIS for short) in textiles was studied. In the method, an acetonitrile ultrasound-assisted extraction process was included in sample pre-treatment, and HPLC/DAD was used in the separation and identification of extractives. After that, the conditions of pre-treatment and chromatograph were optimized. The results showed that the limit of detection (LOD) by this method (S/N10) is 1.0 mg/kg, its recovery ranged from 78.1% to 98.4%, and RSD of the precision test is 3.2%, of which all met the requirements for routine testing.

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Volarization of valuable compound from watermelon by-product using ultrasound-assisted extraction

Food Research ◽

10.26656/fr.2017.4(6).197 ◽

2020 ◽

Vol 4 (6) ◽

pp. 1995-2002

Author(s):

W.Y.C. Lim ◽

N.L. Yusof ◽

Ismail-Fitry M.R. ◽

N. Suleiman

Keyword(s):

Citric Acid ◽

Acid Content ◽

Galacturonic Acid ◽

Value Added ◽

Extraction Process ◽

Ultrasound Assisted Extraction ◽

Pectin Content ◽

Watermelon Rind ◽

Assisted Extraction ◽

Confectionery Products

The aim of this study was to develop an efficient, reliable, and sustainable technology for the recovery of value-added compounds from by-product, in this case, is watermelon rinds. The properties of the watermelon rinds obtained from innovative ultrasoundassisted extraction (UAE) were evaluated. In regard to this, the pectin content, degree of esterification, and galacturonic acid content of the watermelon rind extracts were determined in order to verify the efficiency of the UAE. Initially, the UAE were conducted using two types of acid: citric and hydrochloric. The highest pectin content was obtained using citric acid. Additional UAE was then performed with citric acid at 50, 60, or 70°C for 10, 20, or 30 mins. Both UAE temperature and time significantly influenced the pectin extracts and galacturonic acid. The best findings for a high galacturonic acid content (47.41%) when the watermelon rinds were extracts at 70°C for 20 mins. According to the findings, the extraction process lasted 10 or 20 mins at all temperatures was mainly high-methoxyl pectin, which can form gels under acidic conditions. This suggests that pectins derived from watermelon rinds using UAE may be especially useful as an additive in some confectionery products.

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Antioxidant Capacity and Antigenotoxic Effect of Hibiscus sabdariffa L. Extracts Obtained with Ultrasound-Assisted Extraction Process

Applied Sciences ◽

10.3390/app10020560 ◽

2020 ◽

Vol 10 (2) ◽

pp. 560

Author(s):

Gregorio Iván Peredo Pozos ◽

Mario Alberto Ruiz-López ◽

Juan Francisco Zamora Nátera ◽

Carlos Álvarez Moya ◽

Lucia Barrientos Ramírez ◽

...

Keyword(s):

Antioxidant Activity ◽

Human Lymphocytes ◽

Dry Weight ◽

Extraction Process ◽

Hibiscus Sabdariffa ◽

Ultrasound Assisted Extraction ◽

Solid Ratio ◽

Assisted Extraction ◽

Ultrasound Assisted ◽

Antigenotoxic Effect

Hibiscus sabdariffa (Roselle) is in high demand worldwide due to its beneficial health properties owing to the polyphenols content, mainly in the flower calyx. The objective of this study was to find the best conditions (time and liquid: solid ratio) to extract polyphenols from Roselle using Ultrasound-Assisted Extraction (UAE) (40 kHz, 180 W), with ethanol how solvent; as well as determine the yield of phenols, anthocyanin, flavonoids, tannins, antioxidant activity (DPPH) and antigenotoxic effect (comet assay). A traditional solid-liquid extraction was applied as a reference. Extraction times of 40 and 60 min resulted in the highest polyphenols (13.019 mg GAE/g dry weight (dw)), flavonoids (4.981 CE/g dw), anthocyanins (1.855 mg Cya3GE/g dw), and tannins (0.745 CE/g dw) recoveries and an antioxidant activity (DPPH) of 74.58%. Extracts from white calyces contained similar amounts of phenols and flavonoids, but very little condensed tannins (0.049 CE/g dw) and practically no anthocyanins. Extracts from red and white calyces, showed antigenotoxic activity and repaired capacity of damage caused by mutagens in human lymphocytes.

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Technology and Process Design for Phenols Recovery from Industrial Chicory (Chicorium intybus) Leftovers

Molecules ◽

10.3390/molecules24152681 ◽

2019 ◽

Vol 24 (15) ◽

pp. 2681 ◽

Cited By ~ 3

Author(s):

Camilla Maria Cova ◽

Luisa Boffa ◽

Marco Pistocchi ◽

Silver Giorgini ◽

Rafael Luque ◽

...

Keyword(s):

Extraction Process ◽

Ethanol Solution ◽

Ultrasound Assisted Extraction ◽

Mineral Salts ◽

Primary And Secondary Metabolites ◽

Assisted Extraction ◽

Honestly Significant Difference ◽

Significant Difference ◽

Tukey Honestly Significant Difference ◽

Post Hoc

Vegetal leftovers from the agro–food industry represent a huge source of primary and secondary metabolites, vitamin, mineral salts and soluble as well as insoluble fibers. Economic reports on the growth in the polyphenol market have driven us to focus our investigation on chicory (Chicorium intybus L.), which is one of the most popular horticultural plants in the world and a rich source of phenolic compounds. Ultrasound-assisted extraction (UAE), microwave-assisted extraction (MAE) and their simultaneous combination, using either ethanol/water or water alone (also sub-critical), have been investigated with the aim of designing a green and efficient extraction process. Higher total-polyphenol yields as well as dramatic reductions in extraction times and solvent consumption have been obtained under these conditions. ANOVA test for analyses of variance followed by the Tukey honestly significant difference (HSD) post-hoc test of multiple comparisons was used in the statistical analysis. MAE experiments performed with sub-critical water, and MW/US experiments with an ethanol solution have shown polyphenol recovery values of up to ~3 g of gallic acid equivalents (GAE) per kg of fresh material in only 15 min, while conventional extraction required 240 min to obtain the same result.

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