scholarly journals Determination of Total Phenolic Compounds, Antioxidant Activity and Ferulic Acid in Extracts of Sugar Beet Pulp

2016 ◽  
Vol 4 (43) ◽  
pp. 251-251 ◽  
Author(s):  
Aazam Aarabi ◽  
Masoud Honarvar ◽  
Maryam Mizani ◽  
Hossein Faghihian
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Sugar Beet ◽  
Ferulic Acid ◽  
Sugar Beet Pulp ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Beet Pulp

scholarly journals Determination of total phenolic compounds, antioxidant activity and nutrients in Brazil nuts (Bertholletia excelsa H. B. K.)

2020 ◽  
Vol 14 (8) ◽  
pp. 373-376
Author(s):  
Antonio Saravia Maldonado Selvin ◽  
Montero Fernández Ismael ◽  
Santos Alemán Ricardo ◽  
Abrahan Marcia Fuentes Jhunior ◽  
da Conceição Campelo Ferreira María
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Bertholletia Excelsa ◽  
Brazil Nuts

scholarly journals Phenolic Composition, Antioxidant Activity, andIn VitroAvailability of Four Different Berries

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Javier Marhuenda ◽  
María Dolores Alemán ◽  
Amadeo Gironés-Vilaplana ◽  
Alfonso Pérez ◽  
Gabriel Caravaca ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Total Phenolic ◽  
Phenolic Composition ◽  
Total Phenolic Compounds ◽  
Anthocyanin Concentration

Polyphenols from berries have proved healthy effects after“in vitro”and“in vivo”studies, such as preventing tumor growing and neurodegenerative and cardiovascular diseases. We compared four different kinds of berries—strawberry, raspberry, blackberry, and blueberry—with the aim to distinguish their phenolic composition, concerning their antioxidant capacity along with their“in vitro”availability. Folin-Ciocalteu method was used for the determination of phenolic compounds, and the antioxidant capacity was measured by ORAC method. Moreover, the determination of anthocyanins was accomplished with an HPLC-DAD. Finally, we carried out an“in vitro”digestion to simulate the gastrointestinal digestion. All berries showed good antioxidant capacity with significant differences, besides high total phenolic compounds. Content of anthocyanins measured by HPLC-DAD varied between the different berries, namely, blackberries and strawberries which showed higher anthocyanin concentration. After“in vitro”digestion, berries showed poor bioavailability of the analysis of anthocyanins (9.9%–31.7%). Availability of total phenolic compounds was higher than anthocyanins (33%–73%). Moreover, strawberries and blackberries presented the less availability grade. Decrease in antioxidant activity measured by ORAC method was about 90% in all berries studied. Therefore, bioavailability of phenolic compounds remains unclear and more correlation between“in vitro”and“in vivo”studies seems to be necessary.

scholarly journals Determination of antioxidant activity and total phenolic contents in yogurt added with black cumin (Nigella sativa L.) honey

2021 ◽  
Vol 32 (1) ◽  
pp. 1-5
Author(s):  
Özge Duygu Okur
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Nigella Sativa ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Black Cumin ◽  
Phenolic Contents ◽  
Total Phenolic Contents ◽  
High Level

Abstract This study aims to reveal the antioxidant activity and phenolic ingredients of yogurts added with black cumin (Nigella sativa L.) honey. Therefore, this study aimed to produce healthy food made with black cumin honey with increased total phenolic contents and antioxidant activity. The effect of varying degrees of black cumin honey addition (0, 2.5%, 5%, 10%, 15%) on the antioxidant activity and total phenolic contents of yogurt were examined for 28 days. The antioxidant activity was found between 14.33 and 17.41 mM TE. Total phenolic compounds were between 202.50 and 1415.00 mg GAE/kg. Some important differences were determined between yogurts with black cumin honey and the control with respect to phenolic contents during storage (p < 0.05). The results of study reveal that the augmentation of fortification rate increased the total phenolic characteristic and antioxidant activity of yogurt with black cumin honey. Significantly, these outcomes indicate that yogurt with black cumin honey have a high level of polyphenols and could be consumed as bioactive composition.

Determination of Total Phenolic Compounds and Antioxidant Activity of Ethanolic Extracts of Propolis Using ATR–FT-IR Spectroscopy and Chemometrics

2018 ◽  
Vol 11 (7) ◽  
pp. 2013-2021 ◽  
Author(s):  
Cleidiane da Silva ◽  
Anaclara Prasniewski ◽  
Matheus A. Calegari ◽  
Vanderlei Aparecido de Lima ◽  
Tatiane L. C. Oldoni
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Ir Spectroscopy ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Ethanolic Extracts ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

scholarly journals The determination of ferulic acid in sugar beet pulp

2013 ◽  
Vol 19 (No. 4) ◽  
pp. 143-147 ◽  
Author(s):  
P. Jankovská ◽  
J. Čopíková ◽  
A. Sinitsya
Keyword(s):  
Sugar Beet ◽  
Ferulic Acid ◽  
Sugar Beet Pulp ◽  
Reverse Phase ◽  
Medium Ph ◽  
Vis Spectroscopy ◽  
Beet Pulp ◽  
Good Agreement ◽  
Made In

The content of ferulic acid in sugar beet pulp was determined by reverse phase high-pressure liquid chromatography (HPLC) and UV/VIS-spectroscopy. The acid extracts of pectin carrying feruloyl groups were prepared for analysis. To release ferulic acid from pectin the hydrolysis in alkaline medium (pH = 12.5) was performed. Both non-hydrolysed and hydrolysed extracts were measured by UV/VIS-spectroscopy after pH adjustment to the value of 10. The absorbance maximum was observed at 372 nm (ester of ferulic acid) for non-hydrolysed extracts and at 345 nm (sodium ferulate) for hydrolysed extracts. The HPLC estimation of ferulic acid was made in hydrolysed extracts only. The content of ferulic acid in sugar beet pulp was in the range of 0.3&ndash;0.9% (m/m). The data obtained by application of the particular methods to one set of samples were statistically compared. The results of all methods were in good agreement with each other\

scholarly journals Evaluation of Silicon and Proline Application on the Oxidative Machinery in Drought-Stressed Sugar Beet

Antioxidants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 398
Author(s):  
Muneera D. F. AlKahtani ◽  
Yaser M. Hafez ◽  
Kotb Attia ◽  
Emadeldeen Rashwan ◽  
Latifa Al Husnain ◽  
...  
Keyword(s):  
Antioxidant Enzymes ◽  
Drought Stress ◽  
Phenolic Compounds ◽  
Sugar Beet ◽  
Harmful Effect ◽  
Sugar Yield ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Sod Activity ◽  
Yield Parameters

Drought stress deleteriously affects growth, development and productivity in plants. So, we examined the silicon effect (2 mmol) and proline (10 mmol) individually or the combination (Si + proline) in alleviating the harmful effect of drought on total phenolic compounds, reactive oxygen species (ROS), chlorophyll concentration and antioxidant enzymes as well as yield parameters of drought-stressed sugar beet plants during 2018/2019 and 2019/2020 seasons. Our findings indicated that the root diameter and length (cm), root and shoot fresh weights (g plant−1) as well as root and sugar yield significantly decreased in sugar beet plants under drought. Relative water content (RWC), nitrogen (N), phosphorus (P) and potassium (K) contents and chlorophyll (Chl) concentration considerably reduced in stressed sugar beet plants that compared with control in both seasons. Nonetheless, lipid peroxidation (MDA), electrolyte leakage (EL), hydrogen peroxide (H2O2) and superoxide (O2●−) considerably elevated as signals of drought. Drought-stressed sugar beet plants showed an increase in proline accumulation, total phenolic compounds and up-regulation of antioxidant enzymes catalase (CAT) and superoxide dismutase (SOD) activity to mitigate drought effects. Si and proline individually or the combination Si + proline considerably increased root and sugar yield, sucrose%, Chl concentration and RWC, MDA and EL were remarkably reduced. The treatments led to adjust proline and total phenolic compounds as well as CAT and SOD activity in stressed sugar beet plants. We concluded that application of Si + proline under drought stress led to improve the resistance of sugar beet by regulating of proline, antioxidant enzymes, phenolic compounds and improving RWC, Chl concentration and Nitrogen, Phosphorus and Potassium (NPK) contents as well as yield parameters.

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