scholarly journals Optimization of the Microwave-Assisted Extraction Process for Polysaccharides in Himematsutake (Agaricus blazei Murrill) and Evaluation of Their Antioxidant Activities

2011 ◽  
Vol 17 (6) ◽  
pp. 461-470 ◽  
Author(s):  
Zuofa ZHANG ◽  
Guoying LV ◽  
Huijuan PAN ◽  
Liangen SHI ◽  
Leifa FAN
Keyword(s):  
Antioxidant Activities ◽  
Extraction Process ◽  
Microwave Assisted Extraction ◽  
Agaricus Blazei ◽  
Microwave Assisted ◽  
Assisted Extraction

scholarly journals Alpha-Mangostin-Rich Extracts from Mangosteen Pericarp: Optimization of Green Extraction Protocol and Evaluation of Biological Activity

Molecules ◽  
2018 ◽  
Vol 23 (8) ◽  
pp. 1852 ◽  
Author(s):  
Ali Ghasemzadeh ◽  
Hawa Jaafar ◽  
Ali Baghdadi ◽  
Amin Tayebi-Meigooni
Keyword(s):  
Antioxidant Activities ◽  
Natural Antioxidants ◽  
Extraction Process ◽  
Total Phenolic ◽  
Microwave Assisted Extraction ◽  
Garcinia Mangostana ◽  
Main Compound ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Ic50 Values

Since α-mangostin in mangosteen fruits was reported to be the main compound able to provide natural antioxidants, the microwave-assisted extraction process to obtain high-quality α-mangostin from mangosteen pericarp (Garcinia mangostana L.) was optimized using a central composite design and response surface methodology. The parameters examined included extraction time, microwave power, and solvent percentage. The antioxidant and antimicrobial activity of optimized and non-optimized extracts was evaluated. Ethyl acetate as a green solvent exhibited the highest concentration of α-mangostin, followed by dichloromethane, ethanol, and water. The highest α-mangostin concentration in mangosteen pericarp of 121.01 mg/g dry matter (DM) was predicted at 3.16 min, 189.20 W, and 72.40% (v/v). The verification of experimental results under these optimized conditions showed that the α-mangostin value for the mangosteen pericarp was 120.68 mg/g DM. The predicted models were successfully developed to extract α-mangostin from the mangosteen pericarp. No significant differences were observed between the predicted and the experimental α-mangostin values, indicating that the developed models are accurate. The analysis of the extracts for secondary metabolites showed that the total phenolic content (TPC) and total flavonoid content (TFC) increased significantly in the optimized extracts (OE) compared to the non-optimized extracts (NOE). Additionally, trans-ferulic acid and catechin were abundant among the compounds identified. In addition, the optimized extract of mangosteen pericarp with its higher α-mangostin and secondary metabolite concentrations exhibited higher antioxidant activities with half maximal inhibitory concentration (IC50) values of 20.64 µg/mL compared to those of the NOE (28.50 µg/mL). The OE exhibited the highest antibacterial activity, particularly against Gram-positive bacteria. In this study, the microwave-assisted extraction process of α-mangostin from mangosteen pericarp was successfully optimized, indicating the accuracy of the models developed, which will be usable in a larger-scale extraction process.

scholarly journals Optimization Of Microwave-Assisted Extraction Of Flavonoids From Binahong (Anredera cordifolia) Leaves Using Respon Surface Methodology

2020 ◽  
Vol 7 (3) ◽  
pp. 10-19
Author(s):  
Zaldy Rusli ◽  
Bina Lohita Sari ◽  
Novi Fajar Utami ◽  
S Sabila
Keyword(s):  
Antioxidant Activity ◽  
Ethanol Concentration ◽  
Antioxidant Activities ◽  
Extraction Process ◽  
Extraction Time ◽  
Microwave Assisted Extraction ◽  
Optimum Conditions ◽  
Microwave Assisted ◽  
Assisted Extraction

Binahong (Anredera scandens (L.) Moq.) leaves are one of the plants that empirically can be used for wound healing and contain flavonoids which have antibacterial and antioxidant activities. Determination of the optimum conditions of the Binahong leaf extraction process needs to be done to ensure the extraction quality of the Binahong leaves associated with the given activity. Microwave Assisted Extraction (MAE) is an extraction that utilizes microwave radiation to heat the solvent quickly and efficiently. This study aims to determine the most effective binahong leaf extraction conditions that produce optimal levels of flavonoids and antioxidant activity. The extraction process was carried out using the Microwave assisted extraction (MAE) method. Determination of optimum conditions is done based on Response Surface Method (RSM) with variable ethanol concentration (70%, 80% and 90%), extraction time (4, 12 and 20 minutes) and power (450, 600, and 800 watts) using Box- Behnken Design (BBD) with Design Expert 7.0 software. The extract quality parameters measured were total flavonoid levels and antioxidant activity. The results showed the optimum conditions with the BBD method were obtained at an ethanol concentration of 81.49%, extraction time of 13.84 minutes, and power of 626.19 watts with flavonoid levels of 3.8561% and antioxidant activity (IC50) of 95.51834 ppm with active categories.

Orthogonal test in optimizing microwave-assisted extraction process of magnolin from Magnoliae Flos

2010 ◽  
Vol 30 (5) ◽  
pp. 567-568
Author(s):  
Xiao-li LI ◽  
Ming-yuan ZHANG ◽  
Wei-quan ZHAO ◽  
Man Li ◽  
Hai-ying TENG ◽  
...  
Keyword(s):  
Extraction Process ◽  
Orthogonal Test ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction

scholarly journals Optimization of Microwave-Assisted Extraction of Antioxidants from Bamboo Shoots of Phyllostachys pubescens

Molecules ◽  
2020 ◽  
Vol 25 (1) ◽  
pp. 215 ◽  
Author(s):  
Gualtiero Milani ◽  
Francesca Curci ◽  
Maria Maddalena Cavalluzzi ◽  
Pasquale Crupi ◽  
Isabella Pisano ◽  
...  
Keyword(s):  
Antioxidant Properties ◽  
Extraction Process ◽  
Biologically Active ◽  
Total Phenolic ◽  
Phyllostachys Pubescens ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Bamboo Shoots ◽  
Assisted Extraction ◽  
Time And Energy

Bamboo is a well-known medicinal plant in Southeast Asia that recently has attracted attention for its high polyphenol content and its medical and nutraceutical applications. In this work, polyphenols have been recovered for the first time by microwave-assisted extraction (MAE) from an unusual Italian cultivar of Phyllostachys pubescens bamboo shoots. The effects of three independent variables, such as extraction time, temperature, and solid/liquid ratio, on polyphenol recovery yield were investigated and successfully optimized through the response surface methodology. We demonstrated that MAE is an excellent polyphenols extraction technique from bamboo shoots because the total phenolic content obtained under microwave irradiation optimal conditions (4 min at 105 °C with 6.25 mg/mL ratio) was about eight-fold higher than that obtained with the conventional extraction method. Furthermore, higher total flavonoid content was also obtained under MAE. Consistent with these results, MAE enhanced the extract antioxidant properties with significant improved DPPH, ABTS, and FRAP scavenging ability. Therefore, this innovative extraction process enhances the recovery of biologically active compounds from Phyllostachys pubescens bamboo shoots with a dramatic reduction of time and energy consumption, which paves the way for its industrial application in functional food production.

Sign in / Sign up

Export Citation Format

Share Document