scholarly journals Buffalo Yogurt Fortified with Eucalyptus (Eucalyptus camaldulensis) and Myrrh (Commiphora Myrrha) Essential Oils: New Insights into the Functional Properties and Extended Shelf Life

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6853
Author(s):  
Ahmed Mohamed Hamed ◽  
Awad A. Awad ◽  
Ahmed E. Abdel-Mobdy ◽  
Abdulhakeem Alzahrani ◽  
Ahmad Mohammad Salamatullah
Keyword(s):  
Antioxidant Activity ◽  
Antibacterial Activity ◽  
Essential Oils ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Eucalyptus Camaldulensis ◽  
Inhibition Zone ◽  
Total Phenolic ◽  
Total Phenol Content ◽  
Eucalyptus Oil

Eucalyptus (Eucalyptus camaldulensis) and Myrrh (Commiphora Myrrha) essential oils (EOs) stand out for their benefits in terms of health and functionality. Buffalo set yogurt enriched with different concentrations of EOs (0.3, 0.6, and 0.9%) were investigated. The effects of addition on sensory, syneresis, antibacterial activity, and bioactive properties (total phenol content and antioxidant activity) of yogurt were studied. The most acceptable organoleptic properties of treated yogurt were those samples treated with Eucalyptus oil. The levels of syneresis were decreased by increasing the concentration of EOs. Moreover, the antioxidant activity, antibacterial activity, and total phenolic content were enhanced by increasing the concentration of EOs. Yogurt with 0.9% Eucalyptus oil showed the highest antioxidant activity and total phenolic content. The same concentration of Eucalyptus oil showed the highest antibacterial activity against S. typhimurium (the inhibition zone was 20.63 mm) then E. coli (the inhibition zone was 19.43 mm). On the other hand, the highest antibacterial effect against L. monocytogene was for Myrrh oil-enriched yogurt by 0.9% and the inhibition zone was 19.21 mm. The obtained results showed that Eucalyptus and Myrrh oils can be applied to yogurt to improve its beneficial properties in terms of physical characteristics and for human health due to their antioxidant activity and phenolic materials.

scholarly journals Evaluating the Effect of Gamma Radiation on the Total Phenolic Content, Flavonoids, and Antioxidant Activity of Dried Pleurotus ostreatus ((Jacq. ex. Fr) Kummer) Stored in Packaging Materials

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Nii Korley Kortei ◽  
George Tawia Odamtten ◽  
Mary Obodai ◽  
Victoria Appiah ◽  
Felicia Akuamoa ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Gamma Radiation ◽  
Pleurotus Ostreatus ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Total Phenolic ◽  
Total Phenol Content ◽  
Scavenging Activity

Dried Pleurotus ostreatus mushrooms stored in polythene and polypropylene packs were exposed to gamma radiation from a cobalt-60 source at doses of 0, 0.5, 1, 1.5, and 2 kGy at a dose rate of 1.7 kGy/hr and stored for a period of 1 month. Total phenolic contents, flavonoids, and free radical scavenging activity DPPH (2,2′-diphenyl-1-picrylhydrazyl) were determined using aqueous, ethanol, and methanol extracts by Folin-Ciocaultaeu method as a source of potential natural antioxidants. Total phenol content ranged 0.56 ± 0.01–10.96 ± 1.7 mg/GAE, flavonoids ranged 1.64 ± 0.05–8.92 ± 0.6 mg/QE, DPPH radical scavenging activity also ranged 7.02 ± 0.10–13.03 ± 0.04%, and IC50 values also ranged 0.08–0.16 mg/mL. Statistical differences (P < 0.05) were recorded for the extracts and the treatment doses of mushrooms stored in polythene and polypropylene packs. A significant linear correlation was confirmed between values for the total phenolic content and antioxidant activity of mushroom extracts. The high contents of phenolic compounds indicated that these compounds contribute to high antioxidant activity. Pleurotus ostreatus can be regarded as a promising candidate for natural mushroom sources of antioxidants with high value. The use of low dose gamma radiation by the local food industry could improve the hygienic quality, extend shelf-life, and preserve nutrients and antinutrients.

scholarly journals Antibacterial Potential of some Plant Extracts against Escherichia coli, along with its Phytochemical Analysis, Total Phenolic Content, and Antioxidant Properties

2019 ◽  
Vol 5 (02) ◽  
pp. 96-102
Author(s):  
Pooja Singh ◽  
Upma Srivastava
Keyword(s):  
Escherichia Coli ◽  
Antioxidant Activity ◽  
Antibacterial Activity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Butylated Hydroxytoluene ◽  
Diffusion Method ◽  
Total Phenolic ◽  
Phytochemical Analysis

In vitro antibacterial activity of 21 plant methanolic extracts were investigated by disc diffusion method against gram-negative bacteria Escherichia coli. Amongst the extracts tested, the Datura stramonium L. and Ocimum basilicum L. showed significant antibacterial activity against the bacterial pathogen. D. stramonium showed the highest antibacterial activity followed by O. basilicum extract. Phytochemical analysis of extracts showed the presence of alkaloids, tannins, saponins, flavonoids, and phenols. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging and ABTS analysis of potent extract D. stramonium showed appreciable antioxidant activity. For DPPH and ABTS assay the highest antioxidant activity was observed at 60 mg ml-1 concentration with a percent inhibition of 71.66 and 77.19 with IC50 value 9.71 and 22.16 μg ml-1 respectively. Moreover, the radical scavenging activity of the extract was lower than that observed for the synthetic antioxidants butylated hydroxyanisole (BHA )and butylated hydroxytoluene (BHT). The total phenolic content of D. stramonium extract was found to be 0.592 mg GAE/gm which was assayed using Folin ciocalteau reagent. The results provide evidence that the extract of D. stramonium and O. basilicum can be further recommended in the treatment of the infections caused by E. coli; further D. stramonium is also a potential source of natural antioxidants.

scholarly journals Comparison of antioxidant and antibacterial activities of various herbal essential oils: An In vitro study

2021 ◽  
pp. 322-334
Keyword(s):  
Antibacterial Activity ◽  
Free Radical ◽  
Essential Oils ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Total Phenolic ◽  
Gram Positive

Background and Aims: Herbal essential oils (EOs) have antimicrobial and antioxidant activities due to the high amount of bioactive compounds; therefore, they are considered good candidates for applications in the food and pharmaceutical industries. The present study aimed to assess the total phenolic content and in vitro comparative study of the biological activities of EOs from different plants (e.g., clove, common sage, savory, and organum). Materials and Methods: In this experimental study, total phenolic content in EOs was determined, and their antioxidant capacity was measured by the DPPH free radical scavenging method. The components of essential oil were identified using a Gas chromatography-mass spectrometry (GC-MS) device. Moreover, the antibacterial activity of EOs was evaluated by the disk diffusion method, and minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were evaluated by the broth macro dilution method. Data were analyzed using one-way analysis of variance (ANOVA) and Duncan's multiple range test. Results: The highest content of total phenol (157.07±2.37 mg GAL/g dry weight) was recorded for EO of organum. Moreover, the highest percentage of free radical scavenging was determined at 98.142% for organum. The results of GC/MS analysis depicted that monoterpenes were the main compounds of Eos of organum, and the highest value was obtained for the alpha-pinene (74.04%). Furthermore, the results of antibacterial activity of EOs demonstrated that the highest zone of inhibition with a diameter of 44±0.81 mm was observed for the EO of organum. The lowest values of MIC and MBC were reported as 0.275 and 0.55 mg/mL for the EOs of organum and savory against gram-positive Bacillus cereus, respectively. Conclusion: As evidenced by the results of the current study, the assessed Eos, specifically those of organum, have effective antioxidant and antibacterial activity against bacteria strains, especially gram-positive ones, and can be used as safe antimicrobial compounds in food and health products.

scholarly journals Essential Oil Composition, Total Phenolic Content, and Antioxidant Activity - Determined from Leaves, Flowers and Stems of Origanum Vulgare L. Var. Aureum

2018 ◽  
Vol 1 (1) ◽  
pp. 555-561
Author(s):  
Cristian Moisa ◽  
Lucian Copolovici ◽  
Georgeta Pop ◽  
Andreea Lupitu ◽  
Virgiliu Ciutina ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Essential Oils ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Biologically Active ◽  
Total Phenolic ◽  
Alcoholic Extract ◽  
Origanum Vulgare ◽  
Specific Chemical

Abstract Origanum vulgare L. var. aureum is an aromatic medicinal plant belonging to the Lamiaceae family, rich in essential oils and antioxidants. Its specific chemical composition represents an important source of biologically active principles with diverse applications in food products and nutraceuticals. The aim of this study was to determine the differences between chemical composition of volatile oils, phenolic content and antioxidant activity of different plants parts: leaves, flowers, and stems. Essential oils from leaves and flowers had similar compositions with only few differences between γ-terpinene and trans-ß-ocimene. Total phenolic content and antioxidant activity were determined for the hydro-alcoholic extract obtained from post-distillation oregano waste material. The total phenolic content was determined using Folin-Ciocalteu reagent and varied from 3173 to 6522 mg GAE/L. The major compounds identified by HPLC were syringic acid, pyrocatechol, and catechin. Furthermore, all extracts showed high antioxidant activity, ranging from 31.3 to 44.5 mg GAE/L, with an inhibition percent varying from 63.1 to 88.6%.

scholarly journals Thai Rice Vinegars: Production and Biological Properties

2021 ◽  
Vol 11 (13) ◽  
pp. 5929
Author(s):  
Samuch Taweekasemsombut ◽  
Jidapha Tinoi ◽  
Pitchaya Mungkornasawakul ◽  
Nopakarn Chandet
Keyword(s):  
Antioxidant Activity ◽  
Antibacterial Activity ◽  
Acetic Acid ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Biological Properties ◽  
Total Phenolic ◽  
Glutinous Rice ◽  
Ic50 Value ◽  
Rice Vinegar

Four types of traditional Thai rice—polished, black fragrant, glutinous and black glutinous rice—were separately used as raw material for vinegar production. During alcohol fermentation, using enriched baker’s dried yeast (S. cerevisiae) as a starter culture gave the highest ethanol content over 7 days of fermentation. The conversion of ethanol to acetic acid for vinegar production by Acetobacter pasteurianus TISTR 102 was performed for 25 days. The highest amount of acetic acid was detected with glutinous rice fermentation (6.68% w/v). The biological properties of Thai rice vinegars were determined, including the total phenolic content, antioxidant activity, antibacterial activity and cytotoxicity. Black glutinous rice vinegar exhibited the maximum total phenolic content of 133.68 mg GAE/100 mL. This result was related to the antioxidative activity findings, for which black glutinous rice vinegar exhibited the strongest activity against both ABTS•+ and DPPH• radicals. Cytotoxicity against the human colon cancer cell line (HT-29) provided an IC50 value of 74.02 μg/mL and weak activity in a mouse fibroblast normal cell line (L929) with an IC50 value of 171.06 μg/mL. Glutinous rice vinegar was the most effective vinegar for inhibiting pathogenic bacterial growth of both Gram-negative and Gram-positive bacteria. These results suggested that the value of total phenolic content corresponded to the anticancer activity and antioxidant activity results, while antibacterial activity depended on the acidity of rice vinegar.

scholarly journals Evaluation of Antioxidant and Antimicrobial Activity in Relation to Total Phenolic Content of Green Algae from Black Sea

2019 ◽  
Vol 70 (4) ◽  
pp. 1197-1203 ◽  
Author(s):  
Rodica Sirbu ◽  
Gabriela Stanciu ◽  
Aneta Tomescu ◽  
Ana Maria Ionescu ◽  
Emin Cadar
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antioxidant Activity ◽  
Antibacterial Activity ◽  
Phenolic Compounds ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Ulva Lactuca ◽  
Total Phenolic ◽  
Enteromorpha Intestinalis

Worldwide, marine algae are known to produce a wide variety of bioactive secondary metabolites and several compounds have been derived from them for the prospective development of novel drugs by the pharmaceutical industry. In this context, Ulva lactuca, Enteromorpha intestinales, and Cladophora vagabunda, isolated from Black Sea coastal waters of Romania, were evaluated for their potential for bioactivity. Extracts of the algae selected for the study were prepared using ethanol. The study presents original results concerning the total phenolic content (TPC), determined by the spectrometric method (Folin-Ciocalteu method) and the individual phenols from each species of seaweed studied were identified by HPLC-DAD techniques. Total antioxidant activity (ACL) was studied by photochemiluminescence method, and antibacterial activity was studied on two strains of bacteria, Escherichia coli ATCC 10536 - gram-negative and Staphylococcus aureus ATCC 6538P - gram-positive. Results indicated that the highest total phenolic content was obtained for Cladophora vagabunda (325.8 mg/100 g f.w.), followed by Ulva lactuca (285.5 mg/100 g f.w.) and the lowest rate was registered by Enteromorpha intestinalis (268.8 mg/100 g f.w.). Through HPLC-DAD techniques, 6 individual phenolic compounds were identified in all analyzed seaweeds. In addition, two other phenolic compounds were identified in lower concentrations in Ulva lactuca, but only one phenolic compound in Enteromorpha intestinalis. The results of this study show that there is a strong correlation between antioxidant activity (ACL), antibacterial activity and total phenolic content (TPC). Antioxidant activity shows the same order as total phenolic content (TPC): Cladophora vagabunda (64.15 nmol/g sample) followed by Ulva lactuca (22.8 nmol/g sample) and Enteromorpha intestinalis (10.4 nmol/g sample). The antibacterial activity recorded in all green seaweeds shows that the inhibition sites are higher on Escherichia coli compared to Staphylococcus aureus.

scholarly journals Antioxidant activity and total phenolic content of essential oils and extracts of sweet basil (Ocimum basilicum L.) plants

2019 ◽  
Vol 8 (3) ◽  
pp. 299-305 ◽  
Author(s):  
Adel F. Ahmed ◽  
Fatma A.K. Attia ◽  
Zhenhua Liu ◽  
Changqin Li ◽  
Jinfeng Wei ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Essential Oils ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Ocimum Basilicum ◽  
Total Phenolic ◽  
Sweet Basil

scholarly journals Chemical and Biochemical Characterization of Essential Oils and Their Corresponding Hydrolats from Six Species of the Lamiaceae Family

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2489
Author(s):  
Cristina Laura Popa ◽  
Andreea Lupitu ◽  
Maria Daniela Mot ◽  
Lucian Copolovici ◽  
Cristian Moisa ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Essential Oils ◽  
Total Phenolic Content ◽  
Biochemical Characterization ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Thymus Vulgaris ◽  
Origanum Vulgare ◽  
Lavandula Angustifolia ◽  
Food And Beverage

Many plants belonging to the Lamiaceae family are rich in essential oils (EOs) which are intensively used for aromatherapy, food and beverage flavoring, alternative medicine, cosmetics, and perfumery. Aerial parts of Thymus vulgaris L., Thymus pannonicus All., Lavandula angustifolia L., Lavandula x intermedia, Origanum vulgare L., and Origanum vulgare var. aureum L. were subjected to hydrodistillation, and both resulting fractions were analyzed. The purpose of this study was to determine the chemical composition, antioxidant activity, and total phenolic content of six essential oils and their corresponding hydrolats (HDs) through GC-MS and spectrophotometric analyses. Overall, 161 compounds were identified, some found exclusively in essential oils and others in hydrolats, making them individual products with specific end purposes. The total phenolic content was the highest for the Thymus vulgaris L. EOs (3022 ± mg GAE L−1), because of its high phenolic oxygenated monoterpenes content (thymol and carvacrol) and the smallest for the Lavandula angustifolia L. EOs (258.31 ± 44.29 mg GAE L−1), while hydrolats varied from 183.85 ± 0.22 mg GAE L−1 for Thymus vulgaris L. HD and 7.73 mg GAE L−1 for Thymus pannonicus All. HD. Significant antioxidant effects determined through DPPH• and ABTS•+ assays were also observed in samples with higher hydrophilic compounds. The highest antioxidant activity was determined for Thymus vulgaris L. EO and its corresponding HD. Although EOs are the principal traded economic product, HDs represent a valuable by-product that could still present intense antiseptic activities, similar to their corresponding EOs (thyme and oregano), or have multiple aromatherapy, cosmetics, and household applications (lavender and lavandin).

scholarly journals Seasonal Variation in the Chemical Composition, Antioxidant Activity and Total Phenolic Content of Teucrium persicum Boiss. Essential Oils

2010 ◽  
Vol 5 (7) ◽  
pp. 492-498 ◽  
Author(s):  
Hamid Reza Monsef-Esf ◽  
Abdolhossein Miri ◽  
Mohsen Amini ◽  
Yaghoub Amanzadeh ◽  
Abbas Hadjiakhoo ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Seasonal Variation ◽  
Chemical Composition ◽  
Essential Oils ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic
Sign in / Sign up

Export Citation Format

Share Document