Screening of Indian bee pollen based on antioxidant properties and polyphenolic composition using UHPLC-DAD-MS/MS: A multivariate analysis and ANN based approach

2020 ◽  
pp. 110041
Author(s):  
Mamta Thakur ◽  
Vikas Nanda
Keyword(s):  
Multivariate Analysis ◽  
Antioxidant Properties ◽  
Bee Pollen ◽  
Polyphenolic Composition

scholarly journals Variation of the Polyphenolic Composition and Antioxidant Capacity of Freshly Prepared Pomegranate Leaf Infusions over One-Day Storage

Antioxidants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1187
Author(s):  
Manyou Yu ◽  
Irene Gouvinhas ◽  
Ana Barros
Keyword(s):  
Antioxidant Capacity ◽  
Gallic Acid ◽  
Antioxidant Properties ◽  
Punica Granatum ◽  
Added Value ◽  
Plant Materials ◽  
Polyphenolic Composition ◽  
Punica Granatum L ◽  
Intensive Search ◽  
By Products

In recent decades, an intensive search for natural and novel types of antioxidant polyphenolics has been carried out on numerous plant materials. However, the current literature has very little information on their storage stability in the form of freshly prepared infusions. This study aims to characterize the polyphenolic composition and the antioxidant capacity of pomegranate (Punica granatum L.) leaf infusions over one-day storage (analyzed at 0, 2, 4, 6, 8, and 24 h). Spectrophotometric evaluation demonstrated that the infusion presented no significant changes in the content of total phenols (131.40–133.47 mg gallic acid g−1) and ortho-diphenols (239.91–244.25 mg gallic acid g−1). The infusion also maintained high stability (over 98% and 82%, respectively) for flavonoids (53.30–55.84 mg rutin g−1) and condensed tannins (102.15–124.20 mg epicatechin g−1), with stable (>90%) potent antioxidant capacity (1.5–2.2 mmol Trolox g−1) throughout 0–24 h storage. The main decrease was observed during 0–2 h storage of flavonoids, 8–24 h storage of tannins, and 0–4 h storage of antioxidant capacity. Chromatographic analysis further revealed that 7 decreased and 11 increased compounds were found within 0–24 h storage. The good stability of the total polyphenolics and antioxidant properties might be related to the complex conversion and activity compensation among these compounds. The findings suggest that pomegranate leaf infusion could be of great interest in the valorization of high added-value by-products and in the application of green and functional alternatives in the food-pharma and nutraceutical industries.

scholarly journals Honey and bee pollen produced by Meliponini (Apidae) in Alagoas, Brazil: multivariate analysis of physicochemical and antioxidant profiles

2018 ◽  
Vol 38 (3) ◽  
pp. 493-503 ◽  
Author(s):  
Alysson Wagner Fernandes DUARTE ◽  
Maria Raphaella dos Santos VASCONCELOS ◽  
Melissa ODA-SOUZA ◽  
Favízia Freitas de OLIVEIRA ◽  
Ana Maria Queijeiro LÓPEZ
Keyword(s):  
Multivariate Analysis ◽  
Bee Pollen

The fortification of biscuits with bee pollen and its effect on physicochemical and antioxidant properties in biscuits

LWT ◽  
2015 ◽  
Vol 63 (1) ◽  
pp. 640-646 ◽  
Author(s):  
Magdalena Krystyjan ◽  
Dorota Gumul ◽  
Rafał Ziobro ◽  
Anna Korus
Keyword(s):  
Antioxidant Properties ◽  
Bee Pollen

scholarly journals Application of FTIR-ATR to discriminate peach nectars with higher and lower sugar contents

2020 ◽  
Vol 23 ◽  
Author(s):  
Maria Teresa Coelho ◽  
Fátima Alexandra Valério ◽  
Soraia Inês Pedro ◽  
Ofélia Maria Serralha dos Anjos
Keyword(s):  
Multivariate Analysis ◽  
Nutritional Value ◽  
Fruit Juice ◽  
Antioxidant Properties ◽  
Nutritional Composition ◽  
Nutritional Information ◽  
Flow Through ◽  
Sample Aliquot ◽  
Peach Juice

Abstract Fruit juice does not have the same nutritional value as fresh fruit with regards to the vitamin, mineral and dietary fibre contents and the antioxidant properties. However, it can be part of a healthy diet if it is produced with the minimal addition of sugar. This study aimed to evaluate the performance of the FTIR-ATR technique to discriminate the authenticity (concerning the addition of other pulps) and amount of sugar in peach nectars. This technique is usually used in food analysis because it does not require sample preparation, is quick and allows for the determination of several parameters with a single sample aliquot. The nutritional information provided on the labels of 69 samples of 23 different brands of commercial peach juice, was analysed. The differences in the nutritional composition and in the ingredients were determined according to an analysis of the labels. The largest differences observed between the samples were the sugar contents, the percentages of pulp and the addition of other pulps. All samples were analysed by FTIR-ATR equipped with a controlled temperature flow-through cell. The spectral multivariate analysis suggested it was possible to identify differences in the amount of sugar present and identify the presence of fruit pulps other than peach.

scholarly journals Antioxidant properties of medicinal plants and their effect on microbial spoilage of semi-finished meat, poultry and fish

2022 ◽  
Vol 11 (4) ◽  
pp. 590-602
Author(s):  
N. B. Eremeeva ◽  
N. V. Makarova
Keyword(s):  
Antioxidant Activity ◽  
Raw Materials ◽  
Antioxidant Properties ◽  
Antibacterial Properties ◽  
Biologically Active ◽  
Coliform Bacteria ◽  
Total Bacterial Count ◽  
Experimental Conditions ◽  
Polyphenolic Composition ◽  
Chamomile Flowers

Plant extracts rich in polyphenols can be used in the food industry as natural preservatives, extending the shelf life of prepared and semi-finished foods without chemical preservatives. In this paper, we investigate the polyphenolic composition, antioxidant activity and antibacterial properties of herbal extracts as part of food systems. The research objects were knot grass (Polýgonum aviculáre), marjoram (Oríganum), bur beggar-ticks (Bídenstripartíta), thyme (Thymus), whortleberry leaves (Vaccínium ida vítis), calendula (Calendula), sage (Salvia), chamomile flowers (Matricāriachamomīlla), eucalyptus (Eucalýptus) and bearberry (Arctostáphylosúva-úrsi). We determined the total content of phenolic compounds and flavonoids; the antioxidant activity by DPPH and FRAP methods; variations in the bacterial сontamination of animal raw materials over total bacterial count (TBC), coliform bacteria, yeast/fungi, salmonella and staphylococcus. Extracts of sage (1138±57 mg GA/100 g and 537±25 mg C/100 g), eucalyptus (1073±49 mg GA/100 g and 412±20 mg C/100 g), chamomile flowers (1002±36 mg GA/100 g and 493±22 mg C/100 g) and marjoram (1015±42 mg GA/100 g and 458±21 mg C/100 g) contain the largest amount of biologically active substances (phenols and flavonoids, respectively). Sage, eucalyptus and chamomile extracts demonstrate the highest antioxidant activity among the studied samples. Most of the studied extracts exhibit little or no effect on the organoleptic properties of finished products. In addition, chamomile flower, sage and eucalyptus extracts suppress the growth of pathogenic microorganisms in foods under experimental conditions. The microflora growth is significantly reduced when treating animal raw materials with calendula flowers, marjoram and thyme extracts. Extracts of sage, chamomile flowers, calendula flowers, marjoram and thyme can be recommended as components of food raw materials.

scholarly journals Comparison of Different Extraction Solvents for Characterization of Antioxidant Potential and Polyphenolic Composition in Boletus edulis and Cantharellus cibarius Mushrooms from Romania

Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7508
Author(s):  
Melinda Fogarasi ◽  
Maria-Ioana Socaciu ◽  
Claudiu-Dan Sălăgean ◽  
Floricuța Ranga ◽  
Anca Corina Fărcaș ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Properties ◽  
Extraction Process ◽  
Polyphenolic Compounds ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Strong Positive Correlation ◽  
Acidic Water ◽  
Boletus Edulis ◽  
Polyphenolic Composition

Edible mushrooms are well-known for their nutritional benefits and low energy density. In addition, mushroom extracts contain various bioactive compounds that account for their antioxidant activity; the applied extraction conditions influence the extraction efficiency of such compounds. Therefore, this study investigates the effects of four extractants on the content of polyphenols and antioxidant properties of Boletus edulis and Cantharellus cibarius mushrooms, aiming to optimize the extraction process. Powders of B. edulis and C. cibarius mushrooms were subjected to extraction with acidic water (10% CH3COOH), ethanol/water/acetic acid (15:76.5:8.5, v/v/v), hexane, and diethyl ether to measure their total phenolic content (TPC), total flavonoid content (TFC), and Trolox equivalent antioxidant capacity (TEAC). Furthermore, the level of individual polyphenolic compounds in these extracts was quantified using an HPLC-DAD-ESI-MS method. Results showed that the type of solvent significantly influenced the TPC and TEAC of mushroom powder but insignificantly influenced the TFC. A very strong positive correlation was found between TPC and TEAC, but no correlation was found between TFC and TEAC or TPC and TFC. Acidic water extracted the highest amount of polyphenolic compounds from these mushroom powders. Therefore, the aqueous extract showed the highest TPC and strongest antioxidant activity. Thus, acidic water is recommended for polyphenol analysis in B. edulis and C. cibarius mushrooms.

scholarly journals Profile of the Phenolic Compounds ofRosa rugosaPetals

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Andrzej Cendrowski ◽  
Iwona Ścibisz ◽  
Marta Mitek ◽  
Marek Kieliszek ◽  
Joanna Kolniak-Ostek
Keyword(s):  
Phenolic Compounds ◽  
Bioactive Compounds ◽  
Antioxidant Properties ◽  
Valuable Resource ◽  
Rosa Rugosa ◽  
Total Polyphenols ◽  
Valuable Source ◽  
Esi Ms ◽  
Polyphenolic Composition ◽  
Main Fraction

Rosa rugosapetals are a rich source of phenolic compounds, which determined their antioxidant properties. The aim of this study was to determine the polyphenolic composition of not processed petals ofRosa rugosacollected from the commodity crops and to determine the variability of the contained therein polyphenols between harvesting seasons. Twenty polyphenols were identified by UPLC-ESI-MS. The main fraction of polyphenols was ellagitannins, which are 69 to 74% of the total polyphenols of the petals. In the petals ofRosa rugosa, four anthocyanins have been identified: cyanidin 3,5-di-O-glucoside, peonidin 3-O-sophoroside, peonidin 3,5-di-O-glucoside, and peonidin 3-O-glucoside, of which the predominant peonidin 3,5-di-O-glucoside represented approx. 85% of all the determined anthocyanin compounds. It was found that the petals ofRosa rugosaare a valuable source of bioactive compounds and can be considered as a healthy valuable resource.

Application of benchtop NIR spectroscopy coupled with multivariate analysis for rapid prediction of antioxidant properties of walnut (Juglans regia)

2021 ◽  
Vol 359 ◽  
pp. 129928
Author(s):  
Muhammad Zareef ◽  
Muhammad Arslan ◽  
Md. Mehedi Hassan ◽  
Shujat Ali ◽  
Qin Ouyang ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Juglans Regia ◽  
Antioxidant Properties ◽  
Nir Spectroscopy ◽  
Rapid Prediction
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