scholarly journals Portuguese Kelps: Feedstock Assessment for the Food Industry

2021 ◽  
Vol 11 (22) ◽  
pp. 10681
Author(s):  
Diana Pacheco ◽  
Giuseppe Miranda ◽  
Carolina P. Rocha ◽  
Rosinda L. Pato ◽  
João Cotas ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Total Phenolic Content ◽  
Unsaturated Fatty Acids ◽  
Phenolic Content ◽  
Fatty Acid Content ◽  
Saccharina Latissima ◽  
Total Phenolic ◽  
Composition Analysis ◽  
Flame Atomic Absorption ◽  
Soxhlet Apparatus

Seaweeds have been incorporated in the daily diet of several human cultures since ancient times, due to their nutritional characteristics and healthy properties. The brown seaweeds Undaria pinnatifida, Saccharina latissima, Sacchoriza polyschides, and Laminaria ochroleuca were collected in the Viana do Castelo (Portugal) bay to assess their proximate composition analysis. As a result, the algal biomass was dried, and its moisture and ash content were determined. The dried biomass was then analyzed for total nitrogen/total protein (using the Kjeldahl method), total fiber content (through fiber analyzer digestion), total lipids (in a Soxhlet apparatus), and fatty acid characterization (by gas chromatography-mass spectrometry). Apart from phosphorus, which was analyzed by spectrophotometry, the ashes were employed for mineral and trace element characterization via dry mineralization and quantified using flame atomic absorption spectrometry. Moreover, the total phenolic content was assessed spectrophotometrically by the Folin-Ciocalteu method in the algal aqueous extracts. Analyses showed that their protein concentrations ranged from 12 to 24% dry weight (DW), while lipid concentrations varied between 0.51% and 1.52% DW. Regarding the carbohydrate concentration in these seaweeds, a concentration between 48% and 60% DW was observed. The S. polyschides had the highest overall total phenolic content (6.19 × 10−3 g GAE/100 g of dried algae), while L. ochroleuca had the lowest amount (3.72 × 10−3 g GAE/100 g of dried algae). U. pinnatifida had the highest total fatty acid content (35.13 mg/g DW), whereas S. latissima presented the lowest value (22.59 mg/g DW). Significant concentrations of highly unsaturated fatty acids (HUFA) were observed in both seaweeds, with U. pinnatifida having the highest value (10.20 mg/g DW) and S. latissima the lowest content (4.81 mg/g DW). It is also highlighted that these seaweeds have a nutritional relevance as a source of essential nutrients, including nitrogen, potassium, sodium, calcium, magnesium, and iron.

scholarly journals Fatty acids, phenolic compounds and antioxidant capacity of the seeds from nine grape cultivars (Vitis vinifera L.)

2021 ◽  
Vol 36 (2) ◽  
pp. 116-125
Author(s):  
Ali Guler ◽  
Demet Yildiz Turgut
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Antioxidant Capacity ◽  
Total Phenolic Content ◽  
Unsaturated Fatty Acids ◽  
Phenolic Content ◽  
Total Flavonoid ◽  
Total Phenolic ◽  
Grape Seeds ◽  
Positive Effects

Seeds are one of the main parts of the grapes, and they contain important constituents such as polyphenols, lipids, proteins and carbohydrates. In this study, oil contents, fatty acid composition, total phenolic content, total flavonoid content, monomeric flavan-3-ols and antioxidant capacities of nine grape seeds from nine cultivars were investigated. The correlations between the analyzed parameters were also examined. The oil contents of seeds ranged from 4.96 to 13.35%. Linoleic acid was the predominant fatty acid in the seeds, and it was followed by oleic acid, palmitic acid, stearic acid, linolenic acid, 11-eicosenoic acid and arachidic acid. Total phenolic and total flavonoid contents were 646.50-1120.78 mg GAE/g and 336.69-589.85 mg CE/g, respectively. ‘Italia’ seeds had the highest antioxidant capacity for DPPH and CUPRAC assays while ‘Cabernet Sauvignon’ seeds had the lowest one. The (-)-epigallocatechin, (+)-catechin, (-)-epigallocatechin gallate, (-)-epicatechin and (-)-epicatechin gallate contents in the seeds varied from 1.23 to 6.53 mg/g, 11.61 to 80.20 mg/g, 0.21 to 0.51 mg/g, 2.78 to 48.26 mg/g and 0.08 to 1.50 mg/g, respectively. The (+)-catechin and (-)-epicatechin were the major flavan-3-ol compounds in the grape seeds. Significant correlations were found between total phenolic content, total flavonoid, RSA (DPPH Radical scavenging activity), CUPRAC (Cupric reducing antioxidant capacity) and flavan-3-ols. Consequently, the current study findings support previous information that grape seeds are an important source of antioxidants as well as unsaturated fatty acids, which have positive effects on human health.

scholarly journals The Mineral Profile of Polish Beers by Fast Sequential Multielement HR CS FAAS Analysis and Its Correlation with Total Phenolic Content and Antioxidant Activity by Chemometric Methods

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3402
Author(s):  
Elżbieta Zambrzycka-Szelewa ◽  
Edyta Nalewajko-Sieliwoniuk ◽  
Mariusz Zaremba ◽  
Andrzej Bajguz ◽  
Beata Godlewska-Żyłkiewicz
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Alcoholic Beverage ◽  
Absorption Spectrometry ◽  
Mixed Data ◽  
Total Phenolic ◽  
Fast Method ◽  
Flame Atomic Absorption ◽  
Relative Standard

Beer is the most common alcoholic beverage worldwide, and is an excellent source of macro- and microelements, as well as phenolic compounds. In this study, a fast method for the determination of Na, K, Mg, Ca, Fe, Mn, and Cu in beer was developed using flame atomic absorption spectrometry. The precision of this method was between 0.8 and 8.0% (as the relative standard deviation (RSD)), and limits of detections were in the range of 0.45 (Mn)–94 µg/L (Na). Among the macroelements tested in the beer samples, K was found at the highest concentration, whereas Na was found at the lowest concentration level. Beer also turned out to be a good source of Mg and K. The total phenolic content (TPC) was determined by the Folin–Ciocalteu method, while the antioxidant activity was estimated by the ABTS method. The results show remarkable variations in the mineral content, TPC, and antioxidant activity across the beer types and brands. Moreover, the relations between the type, color, refraction index, antioxidant activity, extract, alcohol, mineral, and the total phenolic contents were investigated using the factor analysis of mixed data (FAMD) combined with hierarchical clustering on principal components (HCPC).

scholarly journals The biochemical content and antioxidant capacities of endemic Tanacetum densum (Lab.) Schultz Bip. subsp. laxum, and Tanacetum densum (Lab.) Schultz Bip. subsp. amani Heywood growing in Turkey

2021 ◽  
Vol 81 (4) ◽  
pp. 1106-1114
Author(s):  
İ. Emre
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Unsaturated Fatty Acid ◽  
Acid Content ◽  
Unsaturated Fatty Acids ◽  
Phenolic Content ◽  
Total Phenolics ◽  
Fatty Acid Content ◽  
Radical Scavenging ◽  
Unsaturated Fatty Acid Content

Abstract Medicinal plants have a significant role in preventing and curing several diseases, and Tanacetum L. is one of these plants. The aim of the present study is to determine the fatty acid, lipid-soluble vitamin, sterol, phenolic content, and antioxidant capacity of Tanacetum densum subsp. laxum and Tanacetum densum subsp. amani, to compare the effect of altitude on the biochemical content and to compare systematically by using fatty acids and phenolics. This study showed that palmitic acid (C16:0) and stearic acid (C18:0) are major sources of saturated fatty acid and oleic acid (C18:1 n9), and linoleic acid (18:2 n6c) and a-linolenic acid (C18:3 n3) are the principal unsaturated fatty acids in the two endemic Tanacetum densum taxa. Also, this study found that the unsaturated fatty acid content (60.11±1.61%) of Tanacetum densum subsp. laxum was higher than the unsaturated fatty acid content (44.13±1.28%) of Tanacetum densum subsp. amani. And also, the ω6/ω3 ratio of Tanacetum densum subsp. laxum (1.74) and Tanacetum densum subsp. amani (1.60) was found to be similar. However, this study determined that the lipid soluble vitamin and sterol content of two endemic Tanacetum taxa are low except for stigmasterol. Present study showed that catechin is principal phenolic in the Tanacetum densum taxa. This study also found that Tanacetum densum subsp. laxum and Tanacetum densum subsp. amani had the highest levels of catechin, vanillic acid, and caffeic acid content though the phenolic amounts, particularly catechin and quercetin, were dissimilar in the T. densum taxa. This study suggested that ecological conditions such as altitude may affect the biochemical content of two endemic Tanacetum densum taxa. Furthermore, the current study determined that two endemic Tanacetum L. taxa had potent radical scavenging capacities and found a correlation between total phenolics and antioxidant activity.

scholarly journals Phenol Contents and Antioxidant Activity of Sonokeling (Dalbergia latifolia Roxb) Wood

2020 ◽  
Vol 11 (1) ◽  
pp. 27-34
Author(s):  
Masendra Masendra ◽  
Denny Irawati ◽  
Alamratush Shoolichah Ridlo ◽  
Ganis Lukmandaru
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic Content ◽  
Native Species ◽  
Building Materials ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Wood Extractives ◽  
Soxhlet Apparatus ◽  
High Antioxidant Activity ◽  
Phenol Composition

Dalbergia latifolia or sonokeling is a native species of Java, Indonesia, used as an important wood for furniture and building materials, due to the high of durability and beautiful color. This study, therefore, aim to investigate the phenol composition, represented by total phenolic,  flavonoid, and flavanol content, as well as antioxidant activity, conducted by DPPH (1, 1-diphenyl-2-picrylhydrazyl) method on Dalbergia latifolia wood. The sample was extracted using ethanol-toluene solvent in a Soxhlet apparatus, and subsequently subjected to column chromatography. This treatment yielded 12 fractions, which were then evaluated for phenol contents and antioxidant activity. The results showed a high antioxidant activity and total phenolic content in Fr.1- Fr.3, while latifolin was detected and characterized by GC-MS and a literature comparison. Therefore, it was established that the antioxidant activity of D. latifolia wood extractives properly correlated with the total phenolic, but not with the total flavonoid and flavanol contents.

scholarly journals Investigation on Green Synthesis, Biocompatibility, and Antibacterial Activity of Silver Nanoparticles Prepared Using Cistus incanus

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5028
Author(s):  
Wioletta Florkiewicz ◽  
Klaudia Pluta ◽  
Dagmara Malina ◽  
Karolina Rudnicka ◽  
Anna Żywicka ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antioxidant Capacity ◽  
Gallic Acid ◽  
Aqueous Extract ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Dry Weight ◽  
Total Phenolic ◽  
Composition Analysis ◽  
Cistus Incanus

This paper describes the plant-mediated preparation of silver nanoparticles with aqueous extract and infusion of Cistus incanus leaves. To evaluate aqueous extract and infusion antioxidant capacity and total phenolic content the DPPH and Folin–Ciocalteau methods were utilized. The antioxidant capacity and total phenolic content of extract and infusion were equal to 85.97 ± 6.54 mg gallic acid equivalents per gram of dry weight.; 10.76 ± 0.59 mg/mL and 12.65 ± 1.04 mg gallic acid equivalents per gram of dry weight.; 3.10 ± 0.14 mg/mL, respectively. The formed nanoparticles displayed the characteristic absorption band in the 380–450 nm wavelength range. The average size of particles was in the 68.8–71.2 nm range. Morphology and phase composition analysis revealed the formation of spherical nanoparticles with a face-centred cubic structure. Immune compatibility tests of nanoparticles and plant extracts showed no activation of the THP1-XBlue™ monocyte. Cytotoxicity tests performed with L929 mice fibroblasts showed that nanoparticles should be utilized at a concentration of 16 ppm. The minimum inhibitory concentrations determined with the microdilution method for nanoparticles prepared with plant infusion for S. aureus and S. epidermidis were 2 ppm and 16 ppm, respectively.

scholarly journals Effect of Addition of Jackfruit Seed Flour on Nutrimental, Phytochemical and Sensory Properties of Snack Bar

2017 ◽  
Vol 5 (2) ◽  
pp. 154-158 ◽  
Author(s):  
Sayooj Meethal ◽  
Narinder Kaur ◽  
Jyoti Singh ◽  
Yogesh Gat
Keyword(s):  
Antioxidant Activity ◽  
Fatty Acid ◽  
Free Fatty Acid ◽  
Total Phenolic Content ◽  
Room Temperature ◽  
Phenolic Content ◽  
Thiobarbituric Acid ◽  
Sensory Properties ◽  
Total Phenolic ◽  
Seed Flour

Present study is undertaken with the aim of estimating quantitative changes in nutritional, phytochemical and sensory properties of snack bar. Nowadays consumers are more concerned about their health, so the need for the nutraceuticals has been increased. In view snack ball was prepared using varied concentrations of jackfruit seed flour and ragi in three different formulations. Present study also quantifies changes in thiobarbituric acid, free fatty acid, total phenolic content and antioxidant activity of snack bar packed in polypropylene and metalized polyester films and stored under room temperature conditions for 28 days of storage study. During storage at room temperature thiobarbituric acid and free fatty acid content were increased while total phenolic content and antioxidant activity were decreased with increase in temperature and progression of storage period. Maximum retention of phytochemicals was observed in the snack ball packed in polypropylene as compared to metalized polyester films and stored at room temperature conditions. Present study indicates potential application of jackfruit seed flour for preparation of low cost nutritious value added product.

scholarly journals Fatty Acid Profile, Tocopherol Content of Seed Oil, and Nutritional Analysis of Seed Cake of Wood Apple (Limonia acidissima L.), an Underutilized Fruit-Yielding Tree Species

Horticulturae ◽  
2021 ◽  
Vol 7 (9) ◽  
pp. 275
Author(s):  
Shrinivas Lamani ◽  
Konerira Aiyappa Anu-Appaiah ◽  
Hosakatte Niranjana Murthy ◽  
Yaser Hassan Dewir ◽  
Hail Z. Rihan
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Seed Oil ◽  
Unsaturated Fatty Acids ◽  
Saturated Fatty Acids ◽  
Fatty Acid Content ◽  
Gas Chromatography Mass Spectrometry ◽  
Total Phenolic ◽  
Seed Cake ◽  
Limonia Acidissima

The present study was aimed at analyzing the fatty acid composition, tocopherols, and physico-chemical characterization of wood apple (Limonia acidissima L.) seed oil and the nutritional profile of seed cake. The fatty acids in seed oil were analyzed by gas chromatography–mass spectrometry (GC-MS), and the total seed oil was 32.02 ± 0.08%, comprising oleic (21.56 ± 0.57%), alpha-linolenic (16.28 ± 0.29%), and linoleic acid (10.02 ± 0.43%), whereas saturated fatty acid content was 33.38 ± 0.60% including palmitic (17.68 ± 0.65%) and stearic acid (14.15 ± 0.27%). A greater amount of unsaturated fatty acids (52.37%) were noticed compared to saturated fatty acids (33.38%); hence the seed is highly suitable for nutritional and industrial applications. Gamma-tocopherol was present in a higher quantity (39.27 ± 0.07 mg/100 g) as compared to alpha (12.64 ± 0.01 mg/100 g) and delta (3.77 ± 0.00 mg/100 g) tocopherols, which are considered as natural antioxidants. The spectrophotometric technique was used for quantitative analysis of total phenolic content, and it revealed 135.42 ± 1.47 mg gallic acid equivalent /100 g DW in seed cake. All the results of the studied seed oil and cake showed a good source of natural functional ingredients for several health benefits.

Agro-morphological Characters, Total Phenolic Content, and Fatty Acid Compositions of Safflower Genetic Resources

2021 ◽  
Vol 29 (1) ◽  
pp. 17-27
Author(s):  
Awraris Derbie Assefa ◽  
Jae Eun Lee ◽  
Jung Sook Sung ◽  
Myeong Chul Lee ◽  
Bum Soo Hahn ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Genetic Resources ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Morphological Characters ◽  
Total Phenolic ◽  
Fatty Acid Compositions

scholarly journals Chemical Composition, Antioxidant and Cytotoxicity Activities of Leaves, Bark, Twigs and Oleo-Resin of Dipterocarpus alatus

Molecules ◽  
2019 ◽  
Vol 24 (17) ◽  
pp. 3083 ◽  
Author(s):  
Chawalit Yongram ◽  
Bunleu Sungthong ◽  
Ploenthip Puthongking ◽  
Natthida Weerapreeyakul
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Cytotoxic Activity ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Total Phenolic ◽  
Composition Analysis ◽  
Cytotoxic Activities ◽  
Antioxidant Power ◽  
Dipterocarpus Alatus

Dipterocarpus alatus (Dipterocarpaceae) is a medicinal plant whose use is well known for the treatment of genito-urinary diseases. However, there is no report of its cytotoxic potential. In this study, the chemical composition, antioxidant and cytotoxic activities of extracts of the leaves, bark, twigs and oleo-resin from D. alatus are investigated. Cytotoxicity was measured by the neutral red (NR) assay against HCT116, SKLU1, SK-MEL2, SiHa and U937 cancer cell lines and antioxidant capacity was evaluated by DPPH, ABTS radical scavenging, and ferric reducing antioxidant power (FRAP) assays. The chemical composition was analyzed by gas chromatography–mass spectrometry (GC-MS). Leaf, bark and twig extracts exhibited stronger antioxidant activity than oleo-resin, with bark extract showing the highest antioxidant activity and the highest total phenolic content. All samples showed more cytotoxic activity against the U937 cell line than HCT116, SKLU1, SK-MEL2 and SiHa cells with oleo-resin being more cytotoxic than melphalan against U937 cells. Chemical composition analysis of oleo-resin by GC-MS showed that the major components were sesquiterpenes, namely α-gurjunene (30.31%), (-)-isoledene (13.69%), alloaromadendrene (3.28%), β-caryophyllene (3.14%), γ-gurjunene (3.14%) and spathulenol (1.11%). The cytotoxic activity of oleo-resin can be attributed to the sesquiterpene content, whereas the cytotoxic and antioxidant activities of leaf, bark and twig extracts correlated to total phenolic content.

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