scholarly journals Effects of Food Processing on Resveratrol and Total Phenolic Content in Melinjo (Gnetum gnemon L.) Seeds

2018 ◽  
Vol 10 (6) ◽  
pp. 1096-1100
Author(s):  
Islamudin Ahmad ◽  
Desta Andriyani ◽  
Christoper Gunawan ◽  
Nisrina Dhiah Fauziah ◽  
Sutriyo Sutriyo ◽  
...  
Keyword(s):  
Food Processing ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Gnetum Gnemon

scholarly journals Total Phenolic Content and Antioxidant Capacity of Selected Canned Fruits

2017 ◽  
Vol 9 (13) ◽  
pp. 96
Author(s):  
Hanis Mastura Yahya ◽  
Wendy Ann Roger ◽  
Hasnah Haron
Keyword(s):  
Antioxidant Capacity ◽  
Food Processing ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Dpph Assay ◽  
Frap Assay ◽  
Antioxidant Power ◽  
Ferric Reducing Antioxidant Power

Fruits are high in polyphenols which are compounds associated with the protection against diseases such as diabetes and cancer. However, food processing including canning can leads to the loss of polyphenol in the fruits. Thus, the aim of this study was to evaluate the total phenolic content (TPC) and antioxidant capacity of canned fruits commercially available in the local supermarkets in Malaysia. The TPC was determined by using Folin-Ciocalteu method while the antioxidant capacity was evaluated by using 2,2-diphenyl-1-picrylhydrazyl radical (DPPH assay) and Ferric Reducing Antioxidant Power (FRAP assay). Five types of different canned fruits with the total of 21 samples including longan, lychee, rambutan, pineapple and orange were selected for the analysis. The samples were analyzed in two forms which were, the homogenized (fruits and syrup) and syrup samples. Canned pineapples have the highest TPC for both homogenized (95.16±30.16 mg GAE/100 g) and syrup sample (108.62±33.88 mg GAE/100 g). For antioxidant capacity, canned pineapple also had the highest value for the homogenized sample (41.79±4.20 umol TE/100 g) while lychee was the highest (46.84±12.81 umol TE/100 g) for syrup sample assessed by DPPH assay. For FRAP assay, lychee was highest in antioxidant capacity for both homogenized sample (40.61±10.55 umol TE/100 g) and syrup sample (33.58±7.56 umol TE/100 g). A positive and significant (P < 0.001) correlation was found between TPC and antioxidant capacity (DPPH and FRAP). In conclusion, canned pineapple and lychee were the highest sources of polyphenol as compared to other types of canned fruits. Further investigation is warranted to determine the specific polyphenol present in the canned fruits.

scholarly journals EFFICACY OF IONIC LIQUID [MIM]BR-BASED MAE ON RESVERATROL AND PHENOLIC COMPOUNDS EXTRACTION FROM GNETUM GNEMON SEEDS AND THEIR DPP-4 INHIBITORY ACTIVITY

2018 ◽  
Vol 10 (1) ◽  
pp. 168
Author(s):  
Arif Arrahman ◽  
Rezi Riadhi Syahdi ◽  
Hana Permatasari ◽  
Intan Fikri Purnama Sari ◽  
Abdul MunÍm
Keyword(s):  
Inhibitory Activity ◽  
Total Phenolic Content ◽  
High Performance ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Screening Assay ◽  
Chromatography Method ◽  
Dipeptidyl Peptidase 4 ◽  
Gnetum Gnemon

Objective: This study aimed to determine the inhibitory activity of 1-butyl-3-methylimidazolium bromide ([bmim]Br) extracts of melinjo seeds(Gnetum gnemon) on dipeptidyl peptidase-4 (DPP-4).Methods: Melinjo seeds were extracted by a [bmim]Br microwave-assisted method using various extraction parameters and the inhibitory activityof DPP-4 of all extracts was determined in 96-well microplates using Cayman inhibitor screening assay. Determination of trans-resveratrol contentwas conducted using a reverse-phase high-performance liquid chromatography method. The total phenolic content was determined using a 96-wellmicroplate reader. Data analysis for the determination of the optimal extraction conditions was developed by response surface methodology.Results: The extract obtained from the third run showed the highest inhibition (28.73%) against DPP-4 activity with the total phenolic content of1.96 mg gallic acid equivalent/g the seed powder.Conclusion: The analytical results revealed the following optimal conditions: Solvent concentration 1.5 M, liquid-solid ratio 23:1, and extraction time15 min.

scholarly journals APPLICATION OF IMIDAZOLE-BASED IONIC LIQUIDS IN MICROWAVE-ASSISTED EXTRACTION OF TRANS-RESVERATROL FROM GNETUM GNEMON L. SEEDS

2018 ◽  
Vol 10 (1) ◽  
pp. 39
Author(s):  
Arif Arrahman ◽  
Andini Gahayati ◽  
Dewi Rizky ◽  
Satya Muslimah ◽  
Abdul Mun’im
Keyword(s):  
Ionic Liquids ◽  
Total Phenolic Content ◽  
High Performance ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Microwave Assisted Extraction ◽  
Chromatography Method ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Gnetum Gnemon

Objective: This study aimed to compare the efficiency of three imidazole-based ionic liquids (ILs) in the microwave-assisted extraction (MAE) oftrans-resveratrol from Gnetum gnemon seeds.Methods: Trans-resveratrol was quantitatively extracted using 1-hexyl-3-methylimidazolium bromide ([hmim]Br), 1-butyl-3-methylimidazoliumchloride ([bmim]Cl), and 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim]BF4) in a microwave oven. Extraction parameters, including solventconcentration, liquid-solid ratio, and extraction time, were optimized using response surface methodology on the basis of the Box–Behnken design.A reverse-phase high-performance liquid chromatography method was used to determine resveratrol content with acetonitrile: water (75:25 v/v) asthe mobile phase. The total phenolic content was determined by the Folin–Ciocalteu method.Results: Under optimal conditions, the resveratrol content when extraction was performed using [hmim]Br, [bmim]Cl, and [bmim]BF4 was 0.068,0.059, and 0.038 mg/g dry weight, respectively, and total phenolic content was 0.647, 1.736, and 1.436 mg gallic acid equivalent/g, respectively.Conclusions: IL-based MAE using [hmim]Br provided the highest trans-resveratrol yield from melinjo seeds and can be used as an alternative methodfor this purpose.

LC-DAD-ESI-MS/MS, total phenolic content, and antioxidant activity of Firmiana simplex

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
MA Ghareeb ◽  
T Mohamed ◽  
AM Saad ◽  
LA Refahy ◽  
MA Sobeh ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Esi Ms

Comparative Study of Antioxidant Activities and Total Phenolic Content of Selected Edible Wild Mushrooms

2011 ◽  
Vol 13 (3) ◽  
pp. 245-255 ◽  
Author(s):  
Hip Seng Yim ◽  
Fook Yee Chye ◽  
Mee Yee Lee ◽  
Patricia Matanjun ◽  
Siew Eng How ◽  
...  
Keyword(s):  
Comparative Study ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Total Phenolic ◽  
Wild Mushrooms ◽  
Edible Wild Mushrooms

Antioxidant capacity of hydroalcoholic extracts of Grewia serrulata DC and Grewia nervosa (Lour.) Panigrahi

2018 ◽  
Vol 9 (1) ◽  
pp. 121
Author(s):  
Mentham Ramesh ◽  
Chandu Babu Rao
Keyword(s):  
Total Phenolic Content ◽  
Superoxide Radical ◽  
Phenolic Content ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Total Flavonoid ◽  
Antioxidant Potential ◽  
Total Phenolic ◽  
Total Flavonoid Content ◽  
Flavonoid Content

The current investigation is intended to evaluate the content of phytochemical constituents and antioxidant potential of hydroalcoholic extracts of stem and root of Grewia serrulata DC (HAESGS & HAERGS) and leaf and bark of Grewia Nervosa (Lour.) panigrahi (HAELGN & HAEBGN). Initially, all the extracts at different concentrations were estimated for their total phenolic content and total flavonoid content. The study was further extended for their antioxidant potential evaluation using various in vitro methods such as 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical, hydroxyl radical and superoxide radical scavenging assays. The total phenolic content (mg gallic acid equivalent per gram of extract) was high in HAELGN (170.82±0.19) and HAERGS (123.00±0.48) than HAESGS (111.2±0.26) and HAEBGN (119.60±0.23). The total flavonoid content (mg quercetin equivalent per gram) is greater in HAERGS (71.24±0.50) and HAESGS (65.68±0.27) than HAELGN (55.82±0.35) and HAEBGN (62.38±0.45). The IC50 values (µg/ml) of different plant extracts inferred that DPPH radical scavenging activity is greater in HAELGN (42.91±0.88) and HAEBGN (53.87±0.35) than HAESGS (126.73±1.20) and HAERGS (88.87±1.25). However, hydroxyl and superoxide radical scavenging activity is more in HAERGS (135.41±1.19 & 88.00±1.42) and HAELGN (172.28±1.91 & 108.163±1.09) than HAESGS (237.3±1.65 & 110.074±0.87) and HAEBGN (204.7±1.04 & 125.54±1.07). The results of present comprehensive analysis demonstrated that both the plants Grewia serrulata DC and Grewia Nervosa (Lour.) panigrahi possess high phenolic, flavonoid contents and potential antioxidant activity, and could be used as a valid source of natural antioxidants and might be utilized for pharmacological screening of various therapeutic activities. Keywords: Grewia serrulata; Grewia Nervosa; Total Phenolic content; Total flavonoid content; Antioxidant potential

EXTRACTION OPTIMIZATION AND ANTIOXIDANT ACTIVITY OF PHENOLIC COMPOUNDS FROM AVOCADO PEEL

2019 ◽  
pp. 49-59
Author(s):  
Nu Linh Giang Ton ◽  
Thi Hoai Nguyen ◽  
Quoc Hung Vo
Keyword(s):  
Antioxidant Activity ◽  
Response Surface Methodology ◽  
Antioxidant Capacity ◽  
Response Surface ◽  
Total Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Quadratic Model ◽  
Total Phenolic ◽  
Total Antioxidant

Avocado peel has been considered as a potential source of natural antioxidants in which phenolics are among the most important compounds. Therefore, this study aims to optimize the extraction process of phenolics using response surface methodology and evaluate the corresponding antioxidant activity. From the quadratic model, the optimal condition was determined including the ethanol concentration 54.55% (v/v), the solvent/solute ratio 71.82/1 (mL/g), temperature 53.03 oC and extraction time 99.09 min. The total phenolic content and the total antioxidant capacity at this condition with minor modifications were 26,74 ± 0,04 (mg GAE/g DW) and 188.06 ± 1.41 (mg AAE/g DW), respectively. The significant correlation between total phenolic content and total antioxidant capacity was also confirmed. Key words: response surface methodology, central composite rotatable design, total phenolic content, total antioxidant capacity, avocado peel

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