scholarly journals Biochemical profile, antioxidant capacity and allelopathic effects from five Ziziphyus spina-christi (L.) provenances growing wild in Saudi Arabia

2020 ◽  
Vol 48 (3) ◽  
pp. 1600-1612
Author(s):  
Souheila NAGHMOUCHI ◽  
Moodi ALSUBEIE
Keyword(s):  
Antioxidant Activity ◽  
Saudi Arabia ◽  
Antioxidant Capacity ◽  
Positive Impact ◽  
Total Phenols ◽  
Leaf Extracts ◽  
Phenolic Profile ◽  
High Antioxidant Activity ◽  
Pharmaceutical Industries ◽  
Allelopathic Effects

The aim of this work was to evaluate phenolic profile, antioxidant capacity and allelopathic effects of six Ziziphyus spina-christi provenances in Saudi Arabia. Total phenols, flavonoids, tannins and antioxidant activity were evaluated. Total phenols, condensed tannins and total flavonoids were present at levels of 62.29 mg GAE/g DM, 16.69 mg CE/g DM and 15.45 µg mg QE/g DM, respectively. The high antioxidant activity (0.15 mg/ml) was noted in Mecca Road provenance. The highest germination, shoots and radicle lengths of tested species were observed in At-taif provenance. Z. spina-christi leaf extracts may be suggested in foods and pharmaceutical industries. Leaf extracts could also provide a natural herbicide with a positive impact on the environment. Provenance of Jizan, Northern Borders and Mecca Road were shown to be particularly effective in antioxidant capacity, while Provenance of Riyadh and Northern Borders shown to have the best allelopathic activity.

Antioxidant activity and zebrafish teratogenicity of hydroalcoholic Moringa oleifera L. leaf extracts

2020 ◽  
Vol 122 (10) ◽  
pp. 3129-3137
Author(s):  
Nurul Fatin Syazleen Mohamad Shariff ◽  
Thangam Singgampalam ◽  
Chean Hui Ng ◽  
Chin Siang Kue
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Moringa Oleifera ◽  
Zebrafish Embryo ◽  
Methanolic Extract ◽  
Ethanolic Extract ◽  
Aqueous Methanol ◽  
Leaf Extracts ◽  
Content Type ◽  
Aqueous Ethanolic Extract

PurposeMoringa oleifera (MO) is a herbal remedy that is rich in essential amino acids and phytochemicals in the leaves, seeds and pods. It is becoming a famous food in various ethnic groups, and the consumption is increasing worldwide. However, there is no safety profile of the hydroalcoholic MO leaf extracts, or documented teratogenicity aspect. This study was sought to compare the antioxidant activity and the teratogenicity of hydroalcoholic MO leaf extracts in the zebrafish embryo.Design/methodology/approachMO leaves were extracted with aqueous alcohols (ethanol or methanol: water, 80:20 v/v) using the Soxhlet method. The antioxidant capacity was determined using DPPH assay. The concentrations of extracts ranging from 3 to 1,000 µg/mL were used to examine the toxicity and teratogenicity on the zebrafish embryo.FindingsBoth hydroalcoholic MO leaf extracts were positive for alkaloids, terpenoids, steroids, tannins, flavonoids, phenols, coumarins, quinones and glycosides, except saponins only absent in aqueous methanol extract. The antioxidant capacity based on lC50, was 15.92 ± 3.62 mg/mL for aqueous methanolic and 25.28 ± 2.89 mg/mL for aqueous ethanolic extract. For acute toxicity, the aqueous methanolic extract has lower LC50 (163.87 ± 12.88 µg/mL) compared to aqueous ethanolic extract (337.48 ± 30.04 µg/mL). The embryo treated with aqueous methanolic extract showed phenotypic defect but not on the aqueous ethanolic extract.Originality/valueThis study suggests that aqueous methanol of MO leaves extract has better antioxidant capacity compared to ethanol, and ethanolic leaf extract is safer (higher LC50 and no teratogenicity) than methanolic extract.

scholarly journals LC-ESI-QTOF/MS Characterization of Phenolic Compounds from Medicinal Plants (Hops and Juniper Berries) and Their Antioxidant Activity

Foods ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 7 ◽  
Author(s):  
Jiafei Tang ◽  
Frank R. Dunshea ◽  
Hafiz A. R. Suleria
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Medicinal Plants ◽  
Antioxidant Capacity ◽  
Phenolic Acids ◽  
Phenolic Content ◽  
Total Phenolic ◽  
High Concentration ◽  
Antioxidant Power ◽  
Pharmaceutical Industries

Hops (Humulus lupulus L.) and juniper berries (Juniperus communis L.) are two important medicinal plants widely used in the food, beverage, and pharmaceutical industries due to their strong antioxidant capacity, which is attributed to the presence of polyphenols. The present study is conducted to comprehensively characterize polyphenols from hops and juniper berries using liquid chromatography coupled with electrospray-ionization quadrupole time-of-flight mass spectrometry (LC-ESI-QTOF/MS) to assess their antioxidant capacity. For polyphenol estimation, total phenolic content, flavonoids and tannins were measured, while for antioxidant capacity, three different antioxidant assays including the 2,2-diphenyl-1-picrylhydrazyl (DPPH) antioxidant assay, the 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical cation decolorization assay and the ferric reducing-antioxidant power (FRAP) assay were used. Hops presented the higher phenolic content (23.11 ± 0.03 mg/g dw) which corresponded to its strong antioxidant activity as compared to the juniper berries. Using LC-ESI-QTOF/MS, a total of 148 phenolic compounds were tentatively identified in juniper and hops, among which phenolic acids (including hydroxybenzoic acids, hydroxycinnamic acids and hydroxyphenylpropanoic acids) and flavonoids (mainly anthocyanins, flavones, flavonols, and isoflavonoids) were the main polyphenols, which may contribute to their antioxidant capacity. Furthermore, the HPLC quantitative analysis showed that both samples had a high concentration of phenolic acids and flavonoids. In the HPLC quantification, the predominant phenolic acids in hops and juniper berries were chlorogenic acid (16.48 ± 0.03 mg/g dw) and protocatechuic acid (11.46 ± 0.03 mg/g dw), respectively. The obtained results highlight the importance of hops and juniper berries as a rich source of functional ingredients in different food, beverage, and pharmaceutical industries.

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.

Phenolic Profile, Antioxidant Capacity, and Antimicrobial Activity of Leaf Extracts from SixVitis viniferaL. Varieties

2012 ◽  
Vol 16 (1) ◽  
pp. 45-60 ◽  
Author(s):  
Višnja Katalinic ◽  
Sonja Smole Mozina ◽  
Ivana Generalic ◽  
Danijela Skroza ◽  
Ivica Ljubenkov ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Capacity ◽  
Leaf Extracts ◽  
Phenolic Profile

scholarly journals Evaluation of Antioxidant activity and Phenolic contents of Kinnow mandarin leaf extracts

2020 ◽  
Vol 11 (3) ◽  
pp. 4665-4669
Author(s):  
Rajat Bhola ◽  
Ramesh Joshi
Keyword(s):  
Antioxidant Activity ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Total Phenol ◽  
Total Phenol Content ◽  
Flavonoid Content ◽  
Leaf Extracts ◽  
Phenolic Components ◽  
Pharmaceutical Industries ◽  
Kinnow Mandarin

Kinnow mandarin is a major citrus fruit crop in India. This study was designed to evaluate Total Phenol content (TPC), Total Flavonoid content (TFC) and antioxidant activity of vegetative and fruit associated leaves extracts of Kinnow at three different times of the year. The results revealed variation in all three parameters chosen: total phenol, flavonoid content as well as antioxidant capacity between vegetative and fruit associated leaves and during different time periods of the study.The TPC and TFC were highest for fruit associated leaf phase II (9.49 ± 0.075 GAE /g dw and 7.74 ± 0.125 QE mg /g dw respectively) whereas antioxidant activity 31.49 ± 0.025 mg AA/g dw was highest for fruit associated leaves phase I extracts. The TPC,TFC and DPPH free radical scavenging activity among the leaf extracts of Kinnow indicated that some non- phenolic components also contributed to the total antioxidant activity in Kinnow leaves extracts examined in the present investigation. To the best of our information, this is the first experiment presenting comprehensive data on TPC, TFC and antioxidant activity for Kinnow leaf extracts. The study further envisaged that the Kinnow leaves may be important sources of antioxidant for food and pharmaceutical industries.

scholarly journals Correlation of Total Polyphenolic Content with Antioxidant Activity of Hydromethanolic Extract and Their Fractions of the Salvia officinalis Leaves from Different Regions of Morocco

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Zakaria Khiya ◽  
Yassine Oualcadi ◽  
Abderrahmane Gamar ◽  
Fatima Berrekhis ◽  
Touria Zair ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Cyclic Voltammetry ◽  
Ethyl Acetate ◽  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Condensed Tannins ◽  
Salvia Officinalis ◽  
Total Phenolic ◽  
Total Antioxidant ◽  
Pharmaceutical Industries

The purpose of this study is to determine the total content of phenols, flavonoids, and condensed tannins, as well as on the antioxidant activity of the extract, and their fractions were measured by 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), phosphomolybdate reduction (or total antioxidant capacity), and cyclic voltammetry (CV). The hydromethanolic extract of Salvia officinalis showed the highest values of total phenolic (176 mgGAE/g of extract) and condensed tannins (162.53 mgEC/g of extract) from the Boulemane and Khenifra regions, respectively. The results showed that the best DPPH assay was found in the ethyl acetate fraction of Salvia officinalis leaves of the Boulemane region (IC50 = 0.002 mg/ml). For the ethyl acetate and butanolic fractions of Salvia officinalis leaves, those collected from different regions have a better reducing capacity (EC50 = 0.021 mg/ml, respectively). For the total antioxidant capacity, the best activity was found in the aqueous fraction of Salvia officinalis leaves of the Boulemane region (108 mgGAE/g of extract). By the cyclic voltammetry method, hydromethanolic extract of Salvia officinalis leaves from the Boulemane region showed an important result (288.8 mgGAE/g). There was a positive correlation between total phenol content (TPC), condensed tannin content (TCT), and total antioxidant capacity (TAC) (r = 0.932, r = 0.896, respectively). The main compounds that have been identified in the hydromethanolic extract of Salvia officinalis are ascorbic acid, gallic acid, 4-hydroxybenzoic acid, tannic acid, and rutin. Due to their antioxidant property, the leaf extracts from Salvia officinalis are used as natural preservative ingredients in food and/or pharmaceutical industries.

scholarly journals Elaboración de una Crema Cosmética a Partir de Extractos de Coriandrum Sativum

2021 ◽  
Vol 6 (2) ◽  
pp. 153
Author(s):  
Viviana Garcia Mir ◽  
Elena Katherine Basurto ◽  
Estefania Amanda Rueda ◽  
Kevin Paul Noles
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Physicochemical Parameters ◽  
Coriandrum Sativum ◽  
Mix Design ◽  
Sodium Borate ◽  
Uv Spectrophotometry ◽  
Total Phenols ◽  
Hydroalcoholic Extract ◽  
Optimal Mix

  Coriandrum sativum L. es una hierba aromática muy empleada como condimento. Presenta gran variedad de metabolitos con diversas propiedades, incluyendo elevada actividad antioxidante. El objetivo del trabajo fue diseñar una crema a partir de extracto hidroalcohólico obtenido de las hojas de Coriandrum sativum L (cilantro) con fines cosméticos. Se partió del estudio de algunos parámetros fisicoquímicos del material vegetal incluyendo la cuantificación del contenido de grasa por resonancia magnética nuclear de baja resolución. Mediante espectrofotometría UV, se valoró el contenido de fenoles totales y la capacidad antioxidante (DPPH) a diferentes extractos de las hojas y los tallos con etanol al 25, 50 y 75%. La mayor cantidad de fenoles totales y actividad antioxidante se obtuvo en el extracto hidroalcohólico (50%) de las hojas con valores de 21,867/0,275 mg/g de muestra seca y 56,68% de decoloración del DPPH. Se diseñó una crema (w/o) a partir del extracto hidroalcohólico de las hojas al 50%, con empleo del diseño de mezcla D-optimal de tres componentes con restricciones: cera de abeja, borato de sodio y agua. Las variables respuesta fueron pH y el área de extensibilidad. Ambas variables presentaron modelos cuadráticos obteniendo una significación p < 0,0002, pérdida de ajuste p>0,05 y R2 ajustado cercano a 1. Finalmente, la formulación obtenida fue la combinación cera de abeja 11,3- borato de sodio- 1 y agua 14,5 con un pH 6,8, extensibilidad 23,7 y 100% deseabilidad. De esta manera se desarrolló una preparación cosmética (crema) de uso tópico natural con actividad antioxidante, empleando herramientas estadísticas.   Palabra clave: Coriandro sativum, fenoles totales, capacidad antioxidante, diseño D-optimal.   Abstract Coriandrum sativum L. is an aromatic herb widely used as a condiment. It presents a variety of metabolites with various properties, such as antioxidant activity. The objective of this work was to design a cream from the hydroalcoholic extract obtained from the leaves of Coriandrum sativum L (Culantro) for cosmetic purposes. A physicochemical parameters study was carried out on the raw drug, including a fat content determination by Low-Resolution Nuclear Magnetic Resonance. The antioxidant capacity (DPPH) and total phenols content were valued in different leaves and stems extracts with 20, 50, and 75% of ethanol through UV spectrophotometry. The highest amount of total phenols was obtained in the hydroalcoholic extract (50%) of leaves with 21,867 / 0,275 mg/g from a dry sample and 56.68% DPPH discoloration. A cosmetic cream was designed starting from a 50% hydroalcoholic leaves extract using a three components D-optimal mix design with restrictions: beeswax, sodium borate, and water. Extensibility, area, and pH were the response variables. Both variables presented quadratic and special cubic models obtaining values of p <0.05, adjustment lost p>0,05, and adjusted R2 near to 1. Experiment 1 shows 100% desirability. The analysis allowed a cosmetic preparation (cream) for natural topical use with antioxidant activity was developed using statistical tools.  Keywords: Coriandrum sativum, total phenols, antioxidant capacity, D-optimal.

TOTAL PHENOLS CONTENT AND ANTIOXIDANT ACTIVITY OF DIFFERENT POLARITY CRUDE EXTRACTS OF DODONAEA VISCOSA

INDIAN DRUGS ◽  
2021 ◽  
Vol 58 (08) ◽  
pp. 79-83
Author(s):  
Maisa R. Shoriqi ◽  
Salem S. Touby ◽  
Mohammad A. Hossain ◽  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Properties ◽  
Water Extract ◽  
Total Phenols ◽  
Dodonaea Viscosa ◽  
Leaf Extracts ◽  
Coarse Powder ◽  
Dry Extract ◽  
Crude Extracts ◽  
Antioxidant Agents

Nowadays, effective medications as antioxidant agents are mandatory for a safe and sustainable environment. Dodonaea viscosa (D. viscosa) is used traditionally by the Omani people to treat rheumatism, toothaches, fever, cold, malaria, headaches, indigestion, ulcers, diarrhea, and constipation, dysmenorrheal and irregular menstruation. This study was carried out to prepare leaf extracts by different solvents and to determine their antioxidant activity and total phenols content. The selected plant was collected locally near the University Campus, Nizwa, Oman. The dried coarse powder was used for the extraction with methanol and it was defatted with water and successively partitioned with different polarity solvents with increasing solvent polarity. The total phenols content and antioxidant activity of the prepared different extracts were assessed by Folin-Ciocalteu reagent (FCR) and 2,2-diphenyl-1-picryl-hydrazyl (DPPH) methods. The total phenols content of different extracts was in the range of 3.02-249.93 mg gallic acid/g dry extract. The chloroform extract showed the maximum amount of total phenol compounds (249.93 mg GAE acid/g dry extract) and the minimum content was found in water extract (3.02 mg GAE acid/g dry extract). The leaf crude extracts were obtained to significant levels of antioxidant activity that ranged from percentage of inhibition from 33-85.92 %. The water extract and n-butanol extracts showed significant levels of antioxidant activity (85.92 % and 84.99 %) against the DPPH free radical method. In conclusion, this study showed that different polarities crude extracts of D. viscosa comprise a significant amount of phenols plus antioxidant properties and have possibilities of being potential use of the selected species for a natural source of antioxidants.

scholarly journals Extracts of red peppers: antioxidant activity and sensory evaluation

2016 ◽  
Vol 46 (2) ◽  
pp. 228-236 ◽  
Author(s):  
Neuza Jorge ◽  
Carolina Médici Veronezi ◽  
Danusa Cassiano Pereira
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Design Methodology ◽  
Reducing Power ◽  
Content Type ◽  
High Antioxidant Activity ◽  
Red Peppers ◽  
Practical Implications

Purpose – This study aims to deal with the evaluation of the antioxidant capacity of lyophilized hydroalcoholic extracts of red peppers in natura. Furthermore, preference was evaluated for the taste and color of soybean oil added red pepper extracts. Design/methodology/approach – The antioxidant capacity was determined by four methods. The content of phenolic compounds, carotenoids and ascorbic acid in the extracts was determined by chromatographic, spectrophotometric and titration methods, respectively. Findings – The results showed that the highest antioxidant capacity was found in Malagueta pepper extract through reducing power (FRAP) method. In this same extract, high amount of phenolic compounds was found. However, the extracts of Bode and Dedo-de-moça peppers had higher amounts of carotenoids and ascorbic acid, respectively. Sensorially, the oil added extracts were preferred. Practical implications – Red peppers are very popular and consumed worldwide, besides being constituted of important phytochemicals. Results showed high antioxidant activity in the extracts of peppers, and high content of phenolic compounds, carotenoids and ascorbic acid mainly in chili. This study highlights the importance of the extracts of red peppers, genus Capsicum, as a source of antioxidants, in addition to vegetable oils. Originality/value – It is important to check the acceptance of the application of extract in vegetable oil, so it can be marketed as a natural antioxidant. This study provides valuable information about the antioxidant capacity of extracts of red peppers and its acceptance.

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