Valorization of hazelnut shells into natural antioxidants by ultrasound-assisted extraction: Process optimization and phenolic composition identification

2018 ◽  
Vol 41 (5) ◽  
pp. e12692 ◽  
Author(s):  
Bo Yuan ◽  
Mei Lu ◽  
Kent M. Eskridge ◽  
Milford A. Hanna
Keyword(s):  
Process Optimization ◽  
Natural Antioxidants ◽  
Extraction Process ◽  
Phenolic Composition ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Hazelnut Shells

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

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.

scholarly journals Natural antioxidants isolated from Schinus areira leaves by ultrasound-assisted extraction

2016 ◽  
Vol 5 (2) ◽  
Author(s):  
Liliana S. Celaya ◽  
Carmen I. Viturro ◽  
Luís R. Silva ◽  
Silvia Moreno
Keyword(s):  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Natural Antioxidants ◽  
Antioxidant Compounds ◽  
Ultrasound Assisted Extraction ◽  
Leaf Extracts ◽  
Chromatography Analysis ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Optimized Conditions

The aim of this study was to optimize the extraction of antioxidant compounds from Schinus areira leaves using  ultrasound assisted extraction and response surface methodology. The effect of sonication time and plant material:solvent ratio were used to optimize the recovery. Results showed that a high recovery of antioxidant compounds from leaves of three different S. areira specimens was achieved under optimized conditions. The leaf extracts obtained displayed a DPPH (1,1-Diphenyl-2-picrylhydrazyl) radical scavenging activity analogous to the well-known antioxidant trolox  (EC50 = 23-46 vs 36.1 µg/mL, respectively). In addition, these extracts showed a good potency to eliminate superoxide and nitric oxide-radicals as well as a moderate antimicrobial activity against gram positive Staphylococcus aureus and Enterococcus faecalis and yeast. HPLC chromatography analysis of the three S. areira leaf extracts showed different high contents of kaempferol-3-O-rutinoside, quercetin-3-O-galactoside and 3-O-caffeoylquinic acid. The results showed that the S. areira leaf extracts contained a high amount of antioxidant phenolic compounds, which might be a valuable source to be used as additives in plant-based foods.

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

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.

scholarly journals Optimization of Ultrasound-Assisted Extraction of Antioxidant Polyphenols from the Seed Coats of Red Sword Bean (Canavalia gladiate (Jacq.) DC.)

Antioxidants ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 200 ◽  
Author(s):  
Yue Zhou ◽  
Xiao-Yu Xu ◽  
Ren-You Gan ◽  
Jie Zheng ◽  
Ya Li ◽  
...  
Keyword(s):  
Extraction Method ◽  
Natural Antioxidants ◽  
Extraction Time ◽  
Antioxidant Compounds ◽  
Extraction Temperature ◽  
Ultrasound Assisted Extraction ◽  
Solid Ratio ◽  
Assisted Extraction ◽  
Ultrasound Assisted ◽  
Seed Coats

The seed coat of red sword bean (Canavalia gladiata (Jacq.) DC.) is rich in antioxidant polyphenols. It is often discarded as a byproduct with the consumption of red sword bean, since it is very thick and not consumed by people. The aim of this study was to develop an ultrasound-assisted extraction method to extract natural antioxidants from the seed coats. The extraction process was optimized by using response surface methodology. After the single-factor experiments, three key factors, including ethanol concentration, liquid/solid ratio, and extraction time, were selected and their interactions were studied using a central composite design. The optimal extraction condition was 60.2% hydroethanol, a liquid/solid ratio of 29.3 mL/g, an extraction time of 18.4 min, an extraction temperature of 50 °C, and ultrasound power of 400 W. Under the optimal conditions, antioxidant activity of the extract was 755.98 ± 10.23 μmol Trolox/g dry weight (DW), much higher than that from maceration (558.77 ± 14.42 μmol Trolox/g DW) or Soxhlet extraction (479.81 ± 12.75 μmol Trolox/g DW). In addition, the main antioxidant compounds in the extract were identified and quantified by high-performance liquid chromatography–diode array detection–tandem mass spectrometry (HPLC–DAD–MS/MS). The concentrations of digalloyl hexoside, methyl gallate, gallic acid, trigalloyl hexoside, and digallic acid were 15.30 ± 0.98, 8.85 ± 0.51, 8.76 ± 0.36, 4.27 ± 0.21, and 2.89 ± 0.13 mg/g DW. This study provides an efficient and green extraction method for the extraction of natural antioxidants from the bean coat of red sword bean. The extract of antioxidants might be added into functional foods or nutraceuticals with potential beneficial functions.

scholarly journals Bioactive Compounds in Bael Fruit Pulp Waste: Ultrasound-Assisted Extraction, Characterization, Modeling, and Optimization Approaches

2020 ◽  
Vol 11 (2) ◽  
pp. 9318-9334
Keyword(s):  
Bioactive Compounds ◽  
Food Additives ◽  
Extraction Process ◽  
Coefficient Of Determination ◽  
Fruit Pulp ◽  
Ultrasound Assisted Extraction ◽  
Modeling And Optimization ◽  
Assisted Extraction ◽  
Pharmaceutical Industries ◽  
Ultrasound Assisted

Bael fruit is an abundant source of bioactive compounds that have importance in the food and pharmaceutical industries. The process of extraction of the bael fruit juice produced a higher percentage of bael fruit pulp waste (BFPW) (37.33 %), which was recycled for the extraction of bioactive compounds. Thus the bioactive compounds like polyphenols, flavonoids, and carotenoids were extracted from BFPW by using the ultrasound-assisted extraction (UAE) technique. The modeling and optimization of the extraction process were carried out by using the experimental design of response surface methodology (RSM). The ethanol concentration of 51.22 %, ultrasound amplitude of 51.45 %, and ultrasound treatment time of 6.11 minutes were obtained to be an RSM optimized values of extraction process variables. The lower values of root mean squared error (RMSE) and mean absolute error (MAE) and higher values of coefficient of determination (R2) indicated admissibility and acceptability of RSM. This extraction process of bioactive compounds has the potential to implement it on an industrial scale for the formulation of food additives and medicines.

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