scholarly journals Effects of Cold-Press and Soxhlet Extraction Systems on Antioxidant Activity, Total Phenol Contents, Fatty Acids, and Tocopherol Contents of Walnut Kernel Oils

2019 ◽  
Vol 68 (2) ◽  
pp. 167-173 ◽  
Author(s):  
Isam A. Mohamed Ahmed ◽  
Fahad Y. Al-Juhaimi ◽  
Mehmet Musa Özcan ◽  
Magdi A. Osman ◽  
Mustafa A. Gassem ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Antioxidant Activity ◽  
Soxhlet Extraction ◽  
Total Phenol ◽  
Cold Press

The Fatty Acids Composition and Antioxidant Activity of Walnut Cold Press Oil

2017 ◽  
Vol 68 (3) ◽  
pp. 507-509 ◽  
Author(s):  
Dana Copolovici ◽  
Simona Bungau ◽  
Rica Boscencu ◽  
Delia Mirela Tit ◽  
Lucian Copolovici
Keyword(s):  
Fatty Acids ◽  
Antioxidant Activity ◽  
Unsaturated Fatty Acids ◽  
Saturated Fatty Acids ◽  
Fatty Acids Composition ◽  
Omega 3 ◽  
Walnut Oil ◽  
Cold Press ◽  
Omega 6 ◽  
Very High

The fatty acids composition and antioxidant activity have been determinate for cold press walnut oil. It has been found that the total saturated fatty acids have been 8.8 % while poly unsaturated fatty acids have been 72.84 %. The ratio between omega-6 and omega-3 has been determined as 5.06 which could help in human healthy diet. On the same side, the antioxidant activity of the oil is very high at a level of 3.65 mmol L-1 and a ratio between lipophilic and hydrophilic fractions of 9.45.

scholarly journals Effect of cold-press and soxhlet extraction on fatty acids, tocopherols and sterol contents of the Moringa seed oils

2019 ◽  
Vol 124 ◽  
pp. 333-337 ◽  
Author(s):  
M.M. Özcan ◽  
K. Ghafoor ◽  
F. Al Juhaimi ◽  
I.A.M. Ahmed ◽  
E.E. Babiker
Keyword(s):  
Fatty Acids ◽  
Soxhlet Extraction ◽  
Seed Oils ◽  
Cold Press

scholarly journals Phenolic Compounds, Antioxidant Activity, and Other Characteristics of Extra Virgin Olive Oils from Italian Autochthonous VarietiesTonda di Villacidro,Tonda di Cagliari,Semidana, andBosana

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Carlo I. G. Tuberoso ◽  
Igor Jerković ◽  
Marialuce Maldini ◽  
Gabriele Serreli
Keyword(s):  
Fatty Acids ◽  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Peroxide Value ◽  
Total Phenol ◽  
Phenolic Composition ◽  
Virgin Olive Oils ◽  
Spectrophotometric Methods ◽  
Olive Oils ◽  
Quality Aspects

Extra virgin olive oils (EVOOs) from the fruits of Italian autochthonous varietiesTonda di Villacidro,Tonda di Cagliari,Semidana, andBosanawere investigated to promote their quality aspects. All the analyzed EVOOs showed low values of acidity (≤0.45%) and of peroxide value (≤6.22 mEq O2/kg). There were no relevant differences in fatty acids and triacylglycerols composition among the four EVOOs. Tocopherols determined by HPLC-FL revealed thatBosanaoil was characterized by the highestα-tocopherol level (213.3 ± 55.4 mg/kg). Chlorophylls, carotenoids, and total phenol (TP) contents as well as antioxidant activity (FRAP, DPPH∙, and ABTS∙+assays) of the oils hydrophilic fractions (HFs) were assessed by spectrophotometric methods. Some differences concerning the antioxidant activity and the TP content were observed:Bosanaoil HF activity was the most pronounced (1.17 ± 0.37 mmol TEAC/kg) and it contained the highest TPs amount (335.20 ± 121.34 mg/kg). HFs phenolic composition was determined by HPLC-DAD. The main identified phenols were secoiridoids, dominating inBosanaoil, such as decarboxymethyl ligstroside aglycone (p-HPEA-EDA, 35.8 ± 19.9 mg/kg) and oleuropein aglycone (3,4-HPEA-EA up to 84.7 mg/kg). In summary, all the four varieties showed good characteristics for the use as quality EVOO.

Screening of Extremophile Microalgae Isolated from High Background Radiation Areas as Source of Bioactive Materials

2020 ◽  
Vol 16 (4) ◽  
pp. 407-414
Author(s):  
Fatemeh Heidari ◽  
Zeinab Shariatmadari ◽  
Hossein Riahi
Keyword(s):  
Antioxidant Activity ◽  
Hot Springs ◽  
Background Radiation ◽  
Cadmium Stress ◽  
Total Phenol ◽  
Total Phenolic ◽  
Extreme Conditions ◽  
Unicellular Cyanobacterium ◽  
High Background ◽  
Cadmium Adsorption

Background: Microalgae are the source of various compounds with high potentials for being used in different industries. The production of such compounds can be raised under extreme conditions. In the present study, four cyanobacteria and one coccoid green alga were examined which were isolated from hot springs in high background radiation areas in Ramsar, a city in the north of Iran. Methods: Cadmium adsorption from aqueous solution, response towards cadmium stress, antioxidant activity, total phenolic compound and drought tolerance were investigated in these microalgae. Results: The results showed that these extremophile microalgae contain valuable biological compounds which can be useful in remediation of heavy metals from contaminated water and soils and pharmaceutical applications. The unicellular cyanobacterium, Chroococidiopsis thermalis IBRC-M50002, was the best strain with the highest biological activity in various testes such as cadmium adsorption (225 mg g-1), cadmium tolerance stress (100 mg ml-1), antioxidant activity (IC50= 18 μg mg-1) and total phenol content (100 μg ml-1). The coccoid green algae Grasiella emersonii IBRC-M50001, also exhibited significant antioxidant activity (IC50=10 μg mg-1) and total phenol compound (116 μg ml-1), but its cadmium adsorption, tolerance at cadmium stress and desiccation were lower than Chroococidiopsis thermalis. Conclusion: HBRAs microalgae, isolated from extreme conditions, are useful microorganisms for the production of bioactive substances and natural antioxidants. In other words, they exhibited high capacity to be used in pharmaceutical, industrial and commercial applications.

scholarly journals Optimization of Ultrasonic Cellulase-Assisted Extraction and Antioxidant Activity of Natural Polyphenols from Passion Fruit

Molecules ◽  
2021 ◽  
Vol 26 (9) ◽  
pp. 2494
Author(s):  
Wei Wang ◽  
Yu-Ting Gao ◽  
Ji-Wen Wei ◽  
Yin-Feng Chen ◽  
Qing-Lei Liu ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Extraction Method ◽  
Ph Value ◽  
Soxhlet Extraction ◽  
Passion Fruit ◽  
Total Phenol Content ◽  
Extraction Temperature ◽  
Scavenging Activity ◽  
Solid Ratio ◽  
Dpph Scavenging

In this paper, ultrasonic cellulase extraction (UCE) was applied to extract polyphenols from passion fruit. The extraction conditions for total phenol content (TPC) and antioxidant activity were optimized using response surface methodology (RSM) coupled with a Box-Behnken design (BBD). The results showed that the liquid-to-solid ratio (X2) was the most significant single factor and had a positive effect on all responses. The ANOVA analysis indicated quadratic models fitted well as TPC with R2 = 0.903, DPPH scavenging activity with R2 = 0.979, and ABTS scavenging activity with R2 = 0.981. The optimal extraction parameters of passion fruit were as follows: pH value of 5 at 30 °C for extraction temperature, 50:1 (w/v) liquid-to-solid ratio with extraction time for 47 min, the experimental values were found matched with those predicted. Infrared spectroscopy suggested that the extract contained the structure of polyphenols. Furthermore, three main polyphenols were identified and quantified by HPLC. The results showed the content of phenolic compounds and antioxidant activity of the optimized UCE were 1.5~2 times higher than that determined by the single extraction method and the Soxhlet extraction method, which indicates UCE is a competitive and effective extraction technique for natural passion fruit polyphenols.

scholarly journals Antioxidant, Antimicrobial Activities and Fatty Acid Components of Flower, Leaf, Stem and Seed of Hypericum scabrum

2011 ◽  
Vol 6 (11) ◽  
pp. 1934578X1100601 ◽  
Author(s):  
Ali Shafaghat
Keyword(s):  
Fatty Acids ◽  
Gas Chromatography ◽  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Radical Scavenging ◽  
Omega 3 Fatty Acids ◽  
Omega 3 ◽  
Hexane Extracts ◽  
Hypericum Scabrum ◽  
Different Parts

The hexane extracts of flower, leaf, stem, and seed of Hypericum scabrum, which were collected from northwestern Iran, were obtained by extraction in a Soxhlet apparatus. The fatty acids were converted to methyl esters and determined by gas chromatography/flame ionization detector (GC/FID) and gas chromatography/mass spectrometry (GC/MS) systems. The hexane extract from the flower, leaf, stem, and seed contained 39.1%, 43.2%, 29.0%, and 37.6% of omega-3 fatty acids, respectively. The other main components of the flower extract were tetracosane (12.2%) and palmitic acid (9.3%), and that of the leaf extract was palmitic acid (7.4%). The stem and seed extracts contained bis(2-ethylhexyl)phthalate (18.7% and 35.7%), nonacosane (11.7% and 3.9%) and linoleic acid (6.5% and 6.9%) as major components. The hexane extracts of different parts from H. scabrum represent an important source of omega-3 fatty acids in several Hypericum species. The antioxidant activity of all hexane extracts was evaluated by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging method. The results indicate that hexane extracts from different parts of H. scabrum possess considerable antioxidant activity. The highest radical scavenging activity was detected in seed, which had an IC50 = 165 μg/mL. The antimicrobial activity of the extracts of those samples were determined against seven Gram-positive and Gram-negative bacteria ( Bacillus subtilis, Enterococcus faecalis, Staphylococcus aureus, S. epidermidis, Escherichia coli, Pseudomonas aeruginosa, and Klebsiella pneumoniae), as well as three fungi ( Candida albicans, Saccharomyces cerevisiae, and Aspergillus niger). The bioassay showed that the oil exhibited moderate antimicrobial activity. This study reveals that the all parts of this plant are attractive sources of fatty acid components, especially the essential ones, as well as of effective natural antioxidants.

scholarly journals Valorization of Flaxseed Oil Cake Residual from Cold-Press Oil Production as a Material for Preparation of Spray-Dried Functional Powders for Food Applications as Emulsion Stabilizers

Biomolecules ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 153 ◽  
Author(s):  
Emilia Drozłowska ◽  
Łukasz Łopusiewicz ◽  
Monika Mężyńska ◽  
Artur Bartkowiak
Keyword(s):  
Antioxidant Activity ◽  
Binding Capacity ◽  
Flaxseed Oil ◽  
Inlet Temperature ◽  
Emulsifying Activity ◽  
Cold Press ◽  
Food Applications ◽  
Water Holding ◽  
Spray Dried ◽  
Oil Binding

Flaxseed oil cake extract (residual from cold-press oil production and rich in proteins and polysaccharides) was evaluated as a potential substrate for the preparation of spray-dried powders with emulsifying activity. Three variants of powders were obtained using different spray-drying process inlet temperatures: 160 °C, 180 °C, and 200 °C. The influence of temperature on physicochemical features (water holding capacity, oil binding capacity, water activity, solubility, color, chemical composition, antioxidant activity, and surface morphology) of the powders was estimated. Additionally, the emulsifying activity of the powders and the stability of oil-in-water emulsions prepared with their various content (0.5%, 1%, and 3%) were determined. Results showed that inlet temperature had significant influence on all physicochemical and functional properties of the powders. Increased inlet temperature decreased solubility and antioxidant activity but increased water-holding capacity, oil-binding capacity, and emulsifying activity. The emulsions prepared with the powder obtained at 200 °C showed the highest stability. SEM images showed the production of relatively spherical particles which were folded or wrinkled with a lot of dentures. This study could open a promising pathway for producing natural and plant-based spray-dried powders for food applications as emulsion stabilizers.

scholarly journals IDENTIFIKASI SENYAWA FITOKIMIA DAN AKTIVITAS ANTIOKSIDAN EKSTRAK KASAR DAUN PEPE

2019 ◽  
Vol 8 (2) ◽  
pp. 111
Author(s):  
Dewa Gede Eka Prayoga ◽  
Komang Ayu Nocianitri ◽  
Ni Nyoman Puspawati
Keyword(s):  
Antioxidant Activity ◽  
Quantitative Data ◽  
Qualitative Data ◽  
Total Phenol ◽  
Total Flavonoids ◽  
Randomized Design ◽  
Solvent Type ◽  
Ic50 Values ◽  
Phytochemical Compounds ◽  
Completely Randomized Design

This research was conducted to identify the phytochemical compounds and antioxidant activity of pepe leaves (Gymnema reticulatum Br.) crude extract in various solvent types. The experimental design used in this research was a completely randomized design with solvent type treatments consisting of 5 types : aquadest, ethyl acetate 96%, acetone 70%, ethanol 70%, and methanol 95%. The treatment was repeated three times, so that 15 experimental units were obtained. Qualitative data obtained in this research were displayed with tables, while quantitative data were analyzed by variance and if the treatment had a significant effect, then followed by Duncan's test. The results showed that the treatment of solvent types affected phytochemical compounds that was extracted from pepe leaves and had a significant effect (P<0.01) on yield, total phenol, total flavonoids, and antioxidant activity. The best results showed that 70% acetone solvents were able to extract phytochemical compounds from alkaloids, saponins, phenols, flavonoids, and steroids in the form of sterols and had the highest antioxidant activity based on 62.06% free radical inhibition percentage with IC50 values of 200.775 mg/L, yield 32.35%, total phenol 36.14 mgGAE/g extract, and total flavonoids 50.37 mgQE/g extract.

Sign in / Sign up

Export Citation Format

Share Document