scholarly journals Assessment of Total Phenolic Content and Antioxidant Activity Potential of Clementine Extract Obtained by Microwave Assisted Extraction Method

2021 ◽  
Vol 18 (4) ◽  
pp. 779-785
Author(s):  
Hanane Azzouzi ◽  
Loubna Elhajji ◽  
Mouad Achchoub ◽  
Mohammed Benbati ◽  
Kaoutar El-Fazazi ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Extraction Method ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Major Interest ◽  
Pharmaceutical Industries

Citrus peels are known as rich source of bioactive compounds. Therefore, the establishment of an appropriate and innovative extraction method is a major interest to the food processing industry. The aim of this work is to assess the total phenolic content (TPC) and antioxidant activity (AA) of peels extracts prepared from five Moroccan clementine varieties. Extracts were prepared with microwave-assisted extraction (MAE) technique using acetone and methanol solvents. The evaluation of the antioxidant activity was performed by DPPH and ABTS- free radical scavenging. The extraction conditions had significant effects on total phenolic content (TPC) and antioxidant activity (AA). In fact, the highest TPC amount of clementine varieties (730.850±0.004mg GAE/100g DM) was obtained with acetone solvent for the Sidi Aissa variety. Regarding antioxidant activity, results with DPPH method showed an important antiradical and antioxidant activities for Sidi Aissa variety with methanol solvent (46.30± 1.01%) . However, ABTS method showed a good antioxidant activity for Ain Taoujdat with methanol solvent (3.02 mg/100g DM). This work provided to study the biochemical quality of Moroccan clementine extracts obtained by two microwave-assisted extraction processes in order to investigate further industrial potential uses in agro-food and pharmaceutical industries

Antioxidant Activities of Lemongrass with Solvent Multi-Step Extraction Microwave-Assisted Extraction as Natural Food Preservative

2021 ◽  
pp. 117-128
Author(s):  
Erminawati Wuryatmo ◽  
Anita Suri ◽  
Rifda Naufalin
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Natural Food ◽  
Microwave Assisted Extraction ◽  
Bioactive Components ◽  
Food Preservative ◽  
Microwave Assisted ◽  
Assisted Extraction

The use of synthetic preservatives is considered to have an adverse effect (carcinogenic) upon prolong consumption. Lemongrass (Cymbopogon citratus) is a plant that has bioactive components to act as antioxidants and potential to use as a natural food preservative. Bioactive components can be non-polar, semi-polar and polar; therefore, to determine the dominant bioactive components, a solvent multi-step extraction carried out. This study aimed to determine the specific bioactive components of lemongrass (antioxidant activity, total phenolic content and total flavonoids) suitable of polarity in the leaves and stem of lemongrass extract obtained from solvent multi-step extraction with Microwave-Assisted Extraction. The solvent used is ethanol (polar), ethyl acetate (semi-polar) and n-hexane (non-polar). The result showed that the highest bioactive components obtained from the polar stem lemongrass with total phenolic content of 19.31 mg GAE/g, flavonoids of 3.31 mg GAE/g. This result related to antioxidant activity of the extract of 79.96 %. The high antioxidant activity showed that lemongrass has potential to be used as a natural food preservative, especially in high fat food products.

scholarly journals Microwave Assisted Extraction of Papaya Leaves and Investigation on Antioxidant Activity

2021 ◽  
pp. 115-122
Author(s):  
. Shobitharai ◽  
Divya Jyothi ◽  
Swathi Das ◽  
C. M. Sumayya ◽  
A. Thabsheer
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Extraction Efficiency ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Phytochemical Analysis ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Conventional Extraction

Microwave assisted extraction (MAE) has gained lot of attention due to its advantages such as less solvent consumption, short time period, higher extraction efficiency, therefore serves as better alternative for conventional extraction methods of plant materials. Plant phenolic compounds are important constituents responsible for reducing the oxidative stress that induces tissue damage which is the one of the major causative factors associated with the chronic disease. Papaya plant is a medicinal plant which became popular for the treatment of dengue fever due to its property. Considering the current medicinal importance of the papaya plant, the present study was aimed at microwave assisted extraction of phenolic content from papaya leaf using ethanol, water as solvent and investigate their antioxidant potential. In order to compare the extraction efficiency of phenolic compounds, conventional extraction and microwave assisted extraction method was used to prepare the extracts. Then extracts were subjected to preliminary phytochemical analysis followed by the estimation of total phenolic content by using Folin-Ciocalteu method. Antioxidant activity was investigated by 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. The alcoholic and aqueous extracts of papaya leaf showed the presence of steroids, alkaloids, saponins, carbohydrates, phenolic compounds by preliminary phytochemical analysis. FTIR spectrum of both aqueous and ethanolic extract showed characteristic peak at 3314.62 cm-1, 1635 cm-1 which provide evidence for presence of phenolic compounds. The total phenolic content of the alcoholic and aqueous leaf extracts from MAE was found to be 43.58mg and 80.58 mg/g papaya leaf powder of the Gallic acid equivalent (GAE), respectively. Aqueous solvent was found to be suitable for extraction of phenolic content from papaya leaf and Microwave assisted extracts showed higher phenolic content and therefore potential antioxidant activity. Therefore, papaya leaf is a good candidate to be used as a natural antioxidant for the treatment of various diseases.

scholarly journals RECOVERY OF THE BIOLOGICAL ACTIVE COMPOUNDS OF Musa Sp. THROUGH MICROWAVE ASSISTED EXTRACTION

2017 ◽  
Vol 18 (2) ◽  
pp. 105-116 ◽  
Author(s):  
Farhan M. Said
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compound ◽  
Phenolic Content ◽  
Irradiation Time ◽  
Total Phenolic ◽  
Microwave Assisted Extraction ◽  
Liquid Ratio ◽  
Microwave Assisted ◽  
Musa Sp ◽  
Assisted Extraction

The objective of this research was to identify the recovery of the biological active compound of Musa sp. thru microwave assisted extraction (MAE) system. Antioxidant activity and phenolic compound were investigated on the effect of temperature, microwave power, irradiation time and solid to liquid ratio. The extraction process was carried out using only distilled water as an extracting agent. The result showed that, at 70oC fresh Musa sp. extracted 45% higher antioxidant compared to the dried Musa sp. 500 W was the best power of MAE to extract antioxidant and phenolic compound of ripe Musa sp., while for unripe Musa sp. 800 W was the best. The best irradiation time was 90 s, where it extracted almost 90% antioxidant activity of ripe and unripe Musa sp. Almost 480 mg GA/100 g FW of total phenolic content was extracted on the unripe peel. Solid to liquid ratio of 3 : 60 was the best parameter to extract antioxidant and phenolic content of ripe and unripe Musa sp. Overall, antioxidant and phenolic compound were significantly higher in the unripe peel, followed by ripe peel, unripe pulp and ripe pulp.

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