Polyphenolic Profile of Larch Knotwood

2021 ◽  
Author(s):  
K. S. Voronin ◽  
A. A. Fenin ◽  
A. K. Zhevlakova ◽  
S. P. Zavadskii ◽  
I. A. Selivanova
Keyword(s):  
Polyphenolic Profile

scholarly journals Antioxidant and antimicrobial activities and UPLC-ESI-MS/MS polyphenolic profile of sweet orange peel extracts

2021 ◽  
Author(s):  
Mohamed G. Shehata ◽  
Tarek S. Awad ◽  
Dalal H. Asker ◽  
Sobhy A. El sohaimy ◽  
Nourhan M. Abd El- Aziz ◽  
...  
Keyword(s):  
Sweet Orange ◽  
Orange Peel ◽  
Antimicrobial Activities ◽  
Esi Ms ◽  
Polyphenolic Profile ◽  
Antioxidant And Antimicrobial Activities

scholarly journals Antioxidant Activity and Polyphenolic Profile of Walnut (Juglans regia L.) Green Husks and Liqueurs

2020 ◽  
Vol 69 (1-2) ◽  
pp. 5-11
Author(s):  
Dijana Kulačanin ◽  
Sandra Bijelić ◽  
Jovana Šućur ◽  
Borivoje Bogdanović ◽  
Sezai Ercisli ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Growth And Development ◽  
Juglans Regia ◽  
Flavonoid Content ◽  
Beneficial Effects ◽  
Cultivar Selection ◽  
Polyphenolic Content ◽  
Polyphenolic Profile ◽  
Selection Of ◽  
Time Point

SummaryThe beneficial effects of walnuts and walnut products on human health, due primarily to their rich polyphenolic content, have been appreciated as an empirical fact for centuries. The purpose of this study is to determine the polyphenolic contents of liqueurs made from the walnut selections ‘Rasna’ and ‘Sava’ and the walnut cultivar ‘Šampion’ (all harvested at three different times), as well as the polyphenolic contents of their green husks. The walnut liqueurs were prepared according to two traditional recipes using young walnut fruits. The highest antioxidant capacity was recorded in the liqueur made from the ‘Rasna’ walnut selection (89.94%), whereas the highest contents of phenols (83.28 mg GAE/g FW), flavonoids (0.83 mg QE/g FW) and proanthocyanidins were found in the liqueur made from the ‘Šampion’ cultivar (14.75 mg CE/g FW). The youngest ‘Rasna’ walnuts, harvested at the first experimental time point, exhibited the highest phenolic and tannin contents, whereas the highest flavonoid content was observed in the ‘Šampion’ cultivar. The biochemical results obtained indicate a decrease in the polyphenolic content of walnut fruits with their growth and development. Moreover, the polyphenolic profiles of the walnut liqueurs considered were found to be greatly affected by the method of preparation and the cultivar/selection of walnuts.

Polyphenolic Profile of the Fruits Grown in Serbia

2018 ◽  
pp. 47-66
Author(s):  
Živoslav Lj. Tešić ◽  
Uroš M. Gašić ◽  
Dušanka M. Milojković-Opsenica
Keyword(s):  
Polyphenolic Profile

Polyphenols in Representative Teucrium Species in the Flora of R. Macedonia: LC/DAD/ESI-MSn Profile and Content

2014 ◽  
Vol 9 (2) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Ilija Mitreski ◽  
Jasmina Petreska Stanoeva ◽  
Marina Stefova ◽  
Gjoshe Stefkov ◽  
Svetlana Kulevanova
Keyword(s):  
Phenolic Compounds ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Flavonoid Glycosides ◽  
Total Phenolic ◽  
Phenylethanoid Glycosides ◽  
Systematic Analysis ◽  
Flavonoid Aglycones ◽  
Phenolic Profiles ◽  
Polyphenolic Profile

In the present work, the polyphenolic profile and content of four Teucrium species ( T. chamaedrys L., T. montanum L., T. polium L., T. scordium L.) from the Macedonian flora were examined. A LC/DAD/ESI-MS n chromatographic method was optimized and 31 phenolic compounds were identified, quantified and classified into four groups: hydroxycinnamic acid derivatives (2), phenylethanoid glycosides (12), flavonoid glycosides (11) and flavonoid aglycones (6). The total phenolic content (mg/g dry herb) ranged from 28.2 ( T. montanum), 30.9 ( T. scordium), 35.1 ( T. polium) to 52.1 ( T. chamaedrys). Phenylethanoid glycosides were the predominant group of polyphenols in the studied samples contributing 60% of the total phenolic content for T. polium and T. scordium and around 90% for T. montanum and T. chamaedrys. The systematic analysis for identification and quantification of all present phenolic compounds contributes to the chemotaxonomy of the investigated Teucrium species and to the valorization based on their phenolic profiles and content.

scholarly journals Polyphenolic profile and antioxidant activities of Madeiran elderberry (Sambucus lanceolata) as affected by simulated in vitro digestion

2017 ◽  
Vol 100 ◽  
pp. 404-410 ◽  
Author(s):  
Joana Pinto ◽  
Vítor Spínola ◽  
Eulogio J. Llorent-Martínez ◽  
María Luisa Fernández-de Córdova ◽  
Lucía Molina-García ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
In Vitro Digestion ◽  
Polyphenolic Profile

scholarly journals Quantification of Polyphenols in Seaweeds: A Case Study of Ulva intestinalis

Antioxidants ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 612 ◽  
Author(s):  
Marie Emilie Wekre ◽  
Karoline Kåsin ◽  
Jarl Underhaug ◽  
Bjarte Holmelid ◽  
Monica Jordheim
Keyword(s):  
Gallic Acid ◽  
Qualitative Data ◽  
Molar Mass ◽  
Total Phenolic ◽  
Special Importance ◽  
Average Molar Mass ◽  
Complex Samples ◽  
Ulva Intestinalis ◽  
Polyphenolic Profile

In this case study, we explored quantitative 1H NMR (qNMR), HPLC-DAD, and the Folin-Ciocalteu assay (TPC) as methods of quantifying the total phenolic content of a green macroalga, Ulva intestinalis, after optimized accelerated solvent extraction. Tentative qualitative data was also acquired after multiple steps of purification. The observed polyphenolic profile was complex with low individual concentrations. The qNMR method yielded 5.5% (DW) polyphenols in the crude extract, whereas HPLC-DAD and TPC assay yielded 1.1% (DW) and 0.4% (DW) respectively, using gallic acid as the reference in all methods. Based on the LC-MS observations of extracts and fractions, an average molar mass of 330 g/mol and an average of 4 aromatic hydrogens in each spin system was chosen for optimized qNMR calculations. Compared to the parallel numbers using gallic acid as the standard (170 g/mol, 2 aromatic H), the optimized parameters resulted in a similar qNMR result (5.3%, DW). The different results for the different methods highlight the difficulties with total polyphenolic quantification. All of the methods contain assumptions and uncertainties, and for complex samples with lower concentrations, this will be of special importance. Thus, further optimization of the extraction, identification, and quantification of polyphenols in marine algae must be researched.

scholarly journals Influence of Accelerated Solvent Extraction Conditions on the LC-ESI-MS/MS Polyphenolic Profile, Triterpenoid Content, and Antioxidant and Anti-lipoxygenase Activity of Rhododendron luteum Sweet Leaves

Antioxidants ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 822
Author(s):  
Marta Olech ◽  
Lena Łyko ◽  
Renata Nowak
Keyword(s):  
Solvent Extraction ◽  
Biological Activities ◽  
Accelerated Solvent Extraction ◽  
Native Plant ◽  
Leaf Extracts ◽  
Plant Resources ◽  
Esi Ms ◽  
Current Trends ◽  
Lipoxygenase Inhibition ◽  
Polyphenolic Profile

Evaluation of native plant resources and their efficient use is one of the current trends in phytochemistry. The main aim of the present study was to investigate the biological activities of different Rhododendron luteum Sweet leaf extracts obtained with the use of accelerated solvent extraction using different solvents and extraction temperatures. All extracts were subjected to bioactivity assays, which revealed considerable anti-lipoxygenase (23.07–90.13% lipoxygenase inhibition) and antiradical potential. All samples exhibited high 2,2-diphenyl-1-picrylhydrazyl (DPPH•) (234.18–621.90 mg Trolox equivalents (TE)/g) and 2,2′-azino-bis-3(ethylbenzthiazoline-6-sulphonic acid) (ABTS•+) (88.79–349.41 mg TE/g) scavenging activity, high antioxidant potential in the Oxygen Radical Absorbance Capacity (ORAC) assay (495.77–1011.59 mg TE/g), and moderate ion chelating (Fe2+) capacity. The chemical profile of each sample was determined using liquid chromatography/electrospray ionization triple quadrupole mass spectrometry (LC-ESI-MS/MS) and spectrophotometric procedures. Twenty-three compounds representing seven polyphenol subclasses were detected and quantified, including some phenolic acids and flavonoids that had not been previously reported for this plant material. It was shown that 5-O-caffeoylquinic acid, protocatechuic acid, catechin, quercetin and its glycosides (hyperoside, isoquercetin, quercitrin), and pentacyclic triterpenes were the dominant secondary metabolites in R. luteum leaves. The antioxidant activity was found to be strongly related to different polyphenol groups and total triterpene content, while the anti-lipoxygenase potential was highly dependent on catechin.

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