scholarly journals Pumpkin (Cucurbita maxima) seed oil: chemical composition, antioxidant activities and its authentication analysis

Food Research ◽  
2019 ◽  
Vol 4 (3) ◽  
pp. 578-584 ◽  
Author(s):  
Abdul Rohman ◽  
Irnawati
Keyword(s):  
Seed Oil ◽  
Antioxidant Activities ◽  
Extraction Procedure ◽  
Soxhlet Extraction ◽  
Bioactive Components ◽  
Ultrasound Assisted Extraction ◽  
Pumpkin Seed ◽  
Beneficial Effects ◽  
Assisted Extraction ◽  
Pumpkin Seed Oil

Pumpkin seed oil (PSO) has been known as functional food oil due to some bioactive components contained such as phenolics and tocopherols with beneficial effects to human health including antioxidants, prevention of certain cancers, and retardation of hypertension progression and alleviation of diabetes mellitus. To extract PSO from corresponding fruit seed, numerous extraction techniques either conventional like Soxhlet extraction or modern extraction systems such as ultrasound-assisted extraction and supercritical extraction were optimized and developed to get maximum yields of PSO with maximum bioactive components. PSO contained tocopherols and other phenolics compounds, therefore, it has potential application in the treatment of diseases related to oxidative stress. Due to the different price of PSO with other vegetable oils, the adulteration practice involving the substitution or addition of PSO with lower price oils such as palm oil and corn oils is possible, therefore analytical method capable of detecting the adulteration practice is available. The aim of this review was to highlight the physicochemical properties, extraction procedure, antioxidant activities and authentication analysis of PSO.

scholarly journals Bioactivity-Guided Isolation of Phytochemicals from Vaccinium dunalianum Wight and Their Antioxidant and Enzyme Inhibitory Activities

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 2075
Author(s):  
Tianrui Zhao ◽  
Mengxue Sun ◽  
Lingpeng Kong ◽  
Qingwang Xue ◽  
Yudan Wang ◽  
...  
Keyword(s):  
Pancreatic Lipase ◽  
Antioxidant Activities ◽  
Bioactive Components ◽  
Inhibitory Effects ◽  
Macroporous Resin ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Ic50 Values ◽  
Trolox Equivalent ◽  
Inhibitory Activities

Vaccinium dunalianum Wight, usually processed as a traditional folk tea beverage, is widely distributed in the southwest of China. The present study aimed to investigate the antioxidant, α-glucosidase and pancreatic lipase inhibitory activities of V.dunalianum extract and isolate the bioactive components. In this study, the crude extract (CE) from the buds of V. dunalianum was prepared by the ultrasound-assisted extraction method in 70% methanol and then purified with macroporous resin D101 to obtain the purified extract (PM). Five fractions (Fr. A–E) were further obtained by MPLC column (RP-C18). Bioactivity assays revealed that Fr. B with 40% methanol and Fr. D with 80% methanol had better antioxidant with 0.48 ± 0.03 and 0.62 ± 0.01 nM Trolox equivalent (TE)/mg extract for DPPH, 0.87 ± 0.02 and 1.58 ± 0.02 nM TE/mg extract for FRAP, 14.42 ± 0.41 and 19.25 ± 0.23 nM TE/mg extract for ABTS, and enzyme inhibitory effects with IC50 values of 95.21 ± 2.21 and 74.55 ± 3.85 for α-glucosidase, and 142.53 ± 11.45 and 128.76 ± 13.85 µg/mL for pancreatic lipase. Multivariate analysis indicated that the TPC and TFC were positively related to the antioxidant activities. Further phytochemical purification led to the isolation of ten compounds (1–10). 6-O-Caffeoylarbutin (7) showed significant inhibitory effects on α-glucosidase and pancreatic lipase enzymes with values of 38.38 ± 1.84 and 97.56 ± 7.53 µg/mL, and had the highest antioxidant capacity compared to the other compounds.

scholarly journals The optimization of ultrasonic method for the extraction of Pumpkin seed (Cucurbita maxima)

2020 ◽  
pp. 45
Author(s):  
Irnawati Irnawati ◽  
Sugeng Riyanto ◽  
Sudibyo Martono ◽  
Abdul Rohman
Keyword(s):  
Soxhlet Extraction ◽  
Extraction Methods ◽  
Total Phenolic ◽  
Solvent Ratio ◽  
Ultrasonic Power ◽  
Pumpkin Seed ◽  
Assisted Extraction ◽  
Dpph Scavenging Activity ◽  
Pumpkin Seed Oil ◽  
Dpph Scavenging

The purpose of the present study was to determine the optimal ultrasound-assisted extraction (UAE) conditions (sample-to-solvent ratio, ultrasonic power, and time) for the extraction of pumpkin seed oil.  Pumpkin seed oil was analyzed for yield, 2.2’-Diphenyl-1-picrylhydrazyl (DPPH) scavenging activity, and total phenolic content.  Soxhlet extraction methods were assessed for comparison.  The Box Behnken design (BBD) was applied to optimize UAE conditions.  The optimum UAE conditions were obtained using sample-to-solvent ratio of 1:10 mL g-1, ultrasonic power of 150 Watt in 15 min extraction time.  Compared with Soxhlet extraction methods, UAE exhibited lower oil yield and total phenolic content but had higher DPPH scavenging activity.  The advantage of ultrasonic-assisted extraction was clearly reduction of extraction duration.

HPLC analysis and activity to determine the effect of drying and extraction on Ficus benghalensis leaves

2020 ◽  
Vol 9 (1) ◽  
pp. 6-10
Author(s):  
Nithyakalyani K
Keyword(s):  
Extraction Method ◽  
Chemical Constituents ◽  
Extraction Procedure ◽  
Chemical Constituent ◽  
Chemical Components ◽  
Drying Method ◽  
Ultrasound Assisted Extraction ◽  
Critical Stage ◽  
Ficus Benghalensis ◽  
Assisted Extraction

Ficus benghalensis is one of those taboo plants in India, which was claimed to be possessed and have weird effects on human health. Apart from this ficus species has a great variety of chemical constituents and an abundant amount of antioxidants. Drying is the most critical stage of improving the activity or preventing the loss of chemical components from a drug. There is another stage of ensuring high chemical constituent content in the plant and that is the extraction procedure. So the point of focus in the current research is to find the effect of extraction method and drying on the anti-inflammatory potential of the plant. The result of the extraction method and drying method of the plant was investigated and found that the ultrasound-assisted extraction of the shade dried leaves was found to give the highest yield of flavonoids and activity.

scholarly journals Bioactive Phenolic Metabolites from Adriatic Brown Algae Dictyota dichotoma and Padina pavonica (Dictyotaceae)

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1187
Author(s):  
Ivana Generalić Mekinić ◽  
Vida Šimat ◽  
Viktorija Botić ◽  
Anita Crnjac ◽  
Marina Smoljo ◽  
...  
Keyword(s):  
Total Phenolics ◽  
Antioxidant Activities ◽  
Principal Component ◽  
Ultrasound Assisted Extraction ◽  
Antioxidant Power ◽  
Dictyota Dichotoma ◽  
Assisted Extraction ◽  
Sample Data ◽  
Ferric Reducing Antioxidant Power ◽  
The Individual

In this study, the influences of temperature (20, 40 and 60 °C) and extraction solvents (water, ethanol) on the ultrasound-assisted extraction of phenolics from the Adriatic macroalgae Dictyota dichotoma and Padina pavonica were studied. The extracts were analysed for major phenolic sub-groups (total phenolics, flavonoids and tannins) using spectrometric methods, while the individual phenolics were detected by HPLC. The antioxidant activities were evaluated using three methods: Ferric Reducing/Antioxidant Power (FRAP), scavenging of the stabile 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and Oxygen Radical Antioxidant Capacity (ORAC). The aim of the study was also to find the connection between the chemical composition of the extracts and their biological activity. Therefore, principal component analysis (PCA), which permits simple representation of different sample data and better visualisation of their correlations, was used. Higher extraction yields of the total phenolics, flavonoids and tannins were obtained using an alcoholic solvent, while a general conclusion about the applied temperature was not established. These extracts also showed good antioxidant activity, especially D. dichotoma extracts, with high reducing capacity (690–792 mM TE) and ORAC values (38.7–40.8 mM TE in 400-fold diluted extracts). The PCA pointed out the significant influence of flavonoids and tannins on the investigated properties. The results of this investigation could be interesting for future studies dealing with the application of these two algae in foods, cosmetics and pharmaceuticals.

The antioxidant effects of pumpkin seed oil on subacute aflatoxin poisoning in mice

2011 ◽  
Vol 28 (12) ◽  
pp. 681-688 ◽  
Author(s):  
Gökhan Eraslan ◽  
Murat Kanbur ◽  
Öznur Aslan ◽  
Mürsel Karabacak
Keyword(s):  
Seed Oil ◽  
Pumpkin Seed ◽  
Pumpkin Seed Oil ◽  
Antioxidant Effects

scholarly journals Optimization of ultrasound-assisted extraction of procyanidins from perilla seed hull and their antioxidant activities in vitro

2019 ◽  
Vol 39 (2) ◽  
pp. 378-387 ◽  
Author(s):  
Hui-Zhen LI ◽  
Yong-Lan TAN ◽  
Zhi-Jun ZHANG ◽  
Yao-Yao XIA ◽  
Xiao-Jun LI ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Seed Hull ◽  
Ultrasound Assisted ◽  
Perilla Seed
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