scholarly journals Impact of post harvest treatment on antioxidant activity and phenolic profile of Moringa oleifera lam leaves

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Edith N. Fombang ◽  
Pierre Nobossé ◽  
Carl M. F. Mbofung ◽  
Damanpreet Singh
Keyword(s):  
Antioxidant Activity ◽  
Moringa Oleifera ◽  
Processing Conditions ◽  
Phenolic Profile ◽  
Post Harvest ◽  
Dietary Phytochemicals ◽  
High Antioxidant Activity ◽  
Phytochemical Profile ◽  
New Compounds ◽  
Moringa Oleifera Lam

Abstract Moringa oleifera leaves are an important source of dietary phytochemicals, such as flavonoids with high antioxidant activity (AOA). These components are however influenced by the post-harvest treatments applied as well as the processing conditions. Hence, it is crucial to determine the most appropriate post-harvest treatment that preserves or enhances AOA. To this effect the influence of steam blanching, fermentation / oxidation, oven drying and roasting of fresh Moringa leaves on their AOA was investigated. Processing conditions of time and temperature for each treatment were optimised using response surface methodology. The effect of the different treatments at optimal conditions on phenolic profile and AOA were compared. Roasting achieved the most significant (p < 0.05) improvement in phenolics (43%) and AOA (22–31%), which was accompanied by the formation of 2 new compounds, quercetin-3-O-acetylglucoside and Quercetine-3-O-rhamnoside. Steam blanching had the most deleterious effect on phenolics (− 31%) and AOA. Post-harvest treatments qualitatively and quantitatively affect phytochemical profile of Moringa leaves. Graphical abstract

Bioaccessibility, antioxidant activity and modulation effect on gut microbiota of bioactive compounds from Moringa oleifera Lam. leaves during digestion and fermentation in vitro

2019 ◽  
Vol 10 (8) ◽  
pp. 5070-5079 ◽  
Author(s):  
Zuman Dou ◽  
Chun Chen ◽  
Xiong Fu
Keyword(s):  
Antioxidant Activity ◽  
Gut Microbiota ◽  
Bioactive Compounds ◽  
Moringa Oleifera ◽  
Modulation Effect ◽  
Gastrointestinal Digestion ◽  
Colonic Fermentation ◽  
Moringa Oleifera Lam

This study aims to investigate the bioaccessibility, bioactivity and gut microbiota modulation effect of Moringa oleifera Lam. leaves after in vitro gastrointestinal digestion and colonic fermentation.

Moringa oleifera Lam. leaf powder antioxidant activity and cytotoxicity in human primary fibroblasts

2020 ◽  
pp. 1-6
Author(s):  
Andrea C. Landázuri ◽  
Arleth Gualle ◽  
Verónica Castañeda ◽  
Emilia Morales ◽  
Andrés Caicedo ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Moringa Oleifera ◽  
Primary Fibroblasts ◽  
Leaf Powder ◽  
Moringa Oleifera Lam

scholarly journals Synthesis and Antioxidant of Some New Pyrazolo[1,5-a]pyrimidine, Pyrazolo[5,1-b]quinazoline and Imidazo[1,2-b]pyrazole Derivatives Incorporating Phenylsulfonyl Moiety

2021 ◽  
Vol 10 (3) ◽  
pp. 2414-2428
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Red Blood Cells ◽  
Blood Cells ◽  
Protective Effects ◽  
Oxidative Hemolysis ◽  
Elemental Analyses ◽  
Phenolic Group ◽  
High Antioxidant Activity ◽  
New Compounds

The synthesis and antioxidant of some new pyrazole analogs were described. It is achieved by the reaction of phenyl-4-(phenylsulfonyl)-1H-pyrazole-3,5-diamine (3) with different bifunctional reagents. The free radical-induced damage and the protective effects of the newly synthesized pyrazoles were studied. These new compounds inhibit the free radical-induced oxidative hemolysis of red blood cells effectively. It was found that these compounds effectively inhibit the free radical-induced oxidative hemolysis of red blood cells. Compound 5, which contain phenolic group, and 17, which bear sulfur, nitrogen atoms, and benzothiazole ring, respectively displayed high antioxidant activity. Analogs 15, 11, 10, and 9 were proved to exhibit antioxidative activity. Structures of new pyrazoles were confirmed by spectroscopic and elemental analyses and have been screened for their antioxidant activity.

scholarly journals Determination of the Phenolic Profile and Antioxidant Activity of Leaves and Fruits of SpanishQuercus coccifera

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
L. Molina-García ◽  
R. Martínez-Expósito ◽  
M. L. Fernández-de Córdova ◽  
E. J. Llorent-Martínez
Keyword(s):  
Antioxidant Activity ◽  
High Performance ◽  
Ion Trap ◽  
Food Samples ◽  
Total Phenolic ◽  
Phenolic Profile ◽  
Ion Trap Mass Spectrometer ◽  
High Antioxidant Activity ◽  
Cardioprotective Effects

In this work, we report the phytochemical composition and antioxidant activity of methanol extracts of leaves and fruits (acorns) ofQuercus coccifera(kermes oak). Forty-one compounds were characterized using high-performance liquid chromatography with electrospray multistage mass spectrometry (HPLC-ESI-MSn) with an ion trap mass spectrometer. A high percentage of the detected compounds were gallic acid derivatives, although some saccharides and flavonoids were also present. This phytochemical pattern is typical inQuercusspecies, which are rich in gallotannins. These compounds are partially responsible for the cardioprotective effects observed in different food samples containing them. We evaluated the antioxidant activity by ABTS and DPPH assays. In both cases, high antioxidant activity was observed, being higher in acorns than in leaves. The high antioxidant potential of the extracts, which is related to the high total phenolic content, indicates the potential benefit of the use of this species as a source of bioactive compounds.

Physicochemical characterization and antioxidant activity of decolorized Moringa oleifera Lam leaf flour

Nutrire ◽  
2017 ◽  
Vol 42 (1) ◽  
Author(s):  
A. da S. Alves ◽  
E. M. B. Teixeira ◽  
G. C. Oliveira ◽  
L. Arantes-Pereira ◽  
C. C. Oliveira ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Moringa Oleifera ◽  
Physicochemical Characterization ◽  
Moringa Oleifera Lam

scholarly journals Evaluation of nutrient and antioxidant activity on steam blanching of Moringa oleifera leaves

2021 ◽  
Vol 306 ◽  
pp. 04016
Author(s):  
Ryzal Satria Aditama ◽  
Heri Ahmad Sukria ◽  
Rita Mutia
Keyword(s):  
Antioxidant Activity ◽  
Product Quality ◽  
Crude Protein ◽  
Dry Matter ◽  
Nutritional Value ◽  
Moringa Oleifera ◽  
Total Flavonoid ◽  
Nutritional Content ◽  
Post Harvest ◽  
Moringa Oleifera Leaves

Moringa oleifera is a plant that has high nutritional content. Post-harvest treatment take effect in improving product quality. This study was carried out to evaluate nutrient and antioxidant activity of steam blanched moringa oleifera leaves. Sample of moringa oleifera were prepared where the temperature 80°C in ±5 minutes for the steam blanched. The fresh M. oleifera and steam blanched M. oleifera leaves dried at 60°C were analyzed for their proximate, mineral, total phenol, total flavonoid, and antioxidant activity contents. The analysis revealed that steam blanched leaves contained more dry matter, crude protein, crude fat, phenolic total, and flavonoid than unblanched leaves. Therefore, its less fibre and mineral. This study showed steam blanching can serve as alternative post-harvest treatment to increase nutritional value of moringa oleifera leaves.

scholarly journals Antioxidant activities and simultaneous HPLC-DAD profiling of polyphenolic compounds from Moringa oleifera Lam. Leaves grown in Bangladesh

Food Research ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 401-408
Author(s):  
K.S. Ahmed ◽  
I.A. Jahan ◽  
F. Jahan ◽  
H. Hosain
Keyword(s):  
Antioxidant Activity ◽  
Moringa Oleifera ◽  
Water Extract ◽  
Ethanol Extract ◽  
Polyphenolic Compounds ◽  
Dihydroxybenzoic Acid ◽  
High Concentration ◽  
Dry Extract ◽  
Mature Leaves ◽  
Moringa Oleifera Lam

Moringa oleifera Lam. has been used as a traditional medicine for the treatment of several diseases. In this study, the antioxidant activity and simultaneous HPLC profiling of polyphenolic compounds in 80% ethanol and water extracts of M. oleifera tender and mature leaves available in Bangladesh were investigated. The 80% ethanol extract of M. oleifera tender leaves contained high concentration and more amount of 3,4- dihydroxybenzoic acid, (-) epicatechin and rosmarinic acid (201.32±1.94, 213.08±1.96 and 133.84±1.42 mg/100 g of dry extract, respectively) than that of mature leaves (82.55±1.09, 141.86±1.10 and 16.23±0.76 mg/100 g of dry extract, respectively). On the other hand, the water extract of M. oleifera tender leaves contained a high concentration of catechin hydrate, trans-ferulic acid and quercetin (530.05±1.91, 166.38±0.90 and 771.74±1.34 mg/100 g of dry extract, respectively) than that of mature leaves (207.21±0.90, 62.42±0.45 and 483.25±1.04 mg/100 g of dry extract, respectively). It was also found that 3,4-dihydroxybenzoic acid, catechol, p-coumaric acid and trans-cinnamic acid were detected only in 80% ethanol extract of M. oleifera leaves but syringic acid was identified in the water extract. In DPPH free radical scavenging activity test, IC50 values of 80% ethanol extract of tender leaves (EETL), 80% ethanol extract of mature leaves (EEML), water extract of tender leaves (WETL) and water extract of mature leaves (WEML) were found to be moderately significant (105.50±1.05, 115.00±1.14, 216.00±1.34 and 269.50±1.56 μg/mL, respectively) when compared to the IC50 value of ascorbic acid, 3.32±0.07 μg/mL. The polyphenolic compounds are responsible for antioxidant activity. On the basis of the present study, it can be suggested that the leaves show antioxidant activity and it’s contained a significant amount and different types of polyphenolic compounds. Standardized polyphenolic compounds from M. oleifera leaves could be used as a better source of natural antioxidant supplement.

scholarly journals Phytochemical Analyses, Antioxidant and Anticancer Activities of Ethanolic Leaf Extracts of Moringa oleifera Lam. Varieties

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2348
Author(s):  
Bilques Farooq ◽  
Bhupendra Koul ◽  
Deveshi Mahant ◽  
Dhananjay Yadav
Keyword(s):  
Antioxidant Activity ◽  
Moringa Oleifera ◽  
Sugar Content ◽  
Soluble Proteins ◽  
Mature Stage ◽  
Cytotoxic Activities ◽  
Anticancer Activities ◽  
Leaf Extracts ◽  
Anticancer Compounds ◽  
Moringa Oleifera Lam

Moringa oleifera Lam. (Moringaceae) is revered as s ‘miracle tree’ due to its remarkable nutritional, medicinal and industrial uses. In our study, a comparative analysis of the nutritional parameters (antioxidant activity, sugar content—TSS, total soluble proteins—TSP and mineral contents), phytochemicals (HPLC analysis of four anticancer compounds), and cytotoxicity of M. oleifera leaf extracts (MLEs) of five selected varieties (conventional, PKM-1, PKM-2, ODC, and Jaffna), was performed. Jaffna variety possessed the highest antioxidant activity (FRAP) followed by other four varieties. The trend observed was: Jaffna (9.47 µg/mL, 18.48 µg/mL, 29.39 µg/mL, and 35.37 µg/mL) > PKM-1 (4.82 µg/mL, 7.63 µg/mL, 22.33 µg/mL, and 27.71 µg/mL) > PKM-2 (2.10 µg/mL, 7.04 µg/mL, 13.18 µg/mL, and 21.78 µg/mL) > ODC (0.17 µg/mL, 2.10 µg/mL, 4.41 µg/mL and 13.94 µg/mL) > Conventional (0.05 µg/mL, 1.08 µg/mL, 2.86 µg/mL, and 5.40 µg/mL), total soluble proteins (TSP) [0.69 ± 0.01 and 0.94 ± 0.01 µg/mL (young and mature stage, respectively)], sugar content (TSS) [0.39 ± 0.01 and 0.51 ± 0.01 µg/mL (young and mature stage, respectively)], chlorophyll content [1.07 ± 0.01 (plantlet stage), 1.36 ± 0.003 (vegetative-stage), 0.82 ± 0.004 (reproductive stage) mg/g], followed by the other four varieties. The trend observed for cytotoxic activities of ethanolic MLEs on HepG2 cell line, based on the IC50 values, was conventional (1.22 mg/mL) > ODC (0.90 mg/mL) > PKM-2 (0.65 mg/mL) > PKM-1 (0.35 mg/mL) > Jaffna (0.15 mg/mL). The results of HPLC quantification of anticancer compounds [beta-sitosterol (0.244%), quercetin (0.216%), kaempferol (0.013%), and moringin (0.063%)] was also in consonance with that of MTT assay. In summary, the trend observed in all the parameters tested was Jaffna > PKM-1 > PKM-2 > ODC > conventional. Thus, Jaffna variety has a better potential to combat malnutrition and cancer and must be recommended for commercial plantations.

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