scholarly journals Peel of Traditional Apple Varieties as a Great Source of Bioactive Compounds: Extraction by Micro-Matrix Solid-Phase Dispersion

Foods ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 80 ◽  
Author(s):  
Ante Lončarić ◽  
Katarina Matanović ◽  
Perla Ferrer ◽  
Tihomir Kovač ◽  
Bojan Šarkanj ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Solid Phase ◽  
Polyphenolic Compounds ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion ◽  
Apple Varieties ◽  
Relative Contribution ◽  
Apple Peel ◽  
Polyphenolic Content ◽  
Total Polyphenolic Content

Micro matrix solid phase dispersion (micro-MSPD) was optimized by response surface methodology for the extraction of polyphenols from the peel of twelve traditional and eight commercial apple varieties grown in Croatia. The optimized micro-MSPD procedure includes the use of 0.2 g of sample, 0.8 g of dispersant, a 57% solution of methanol in water as the solvent and 5 mL of extract volume. The total polyphenolic index (TPI) and antioxidant activity (AA) were measured by spectrophotometric assays. Eighteen polyphenolic compounds were identified in all investigated apples by HPLC-DAD and LC-(ESI)-MS. The peel of traditional apple varieties had higher contents of all investigated polyphenols. Calculated relative contribution of polyphenol groups indicated non-flavonoids (28.6%) and flavanols (46.2%) as the major contributors to the total polyphenolic content in traditional and commercial apple varieties, respectively. The most abundant polyphenol in traditional apple peel was chlorogenic acid, procyanidin B2 and epicatechin (1143 ± 755 µg/g dw, 954 ± 343 µg/g dw and 560 ± 362 µg/g dw, respectively). The peel of varieties ‘Apistar’, ‘Bobovac’ and ‘Božićnica’ could be highlighted as an important source of polyphenols.

scholarly journals Effect of Roasting, Boiling, and Frying Processing on 29 Polyphenolics and Antioxidant Activity in Seeds and Shells of Sweet Chestnut (Castanea sativa Mill.)

Plants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2192
Author(s):  
Ahmed M. Mustafa ◽  
Doaa Abouelenein ◽  
Laura Acquaticci ◽  
Laura Alessandroni ◽  
Rehab H. Abd-Allah ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Antioxidant Activity ◽  
Castanea Sativa ◽  
Principal Component ◽  
Polyphenolic Compounds ◽  
Sweet Chestnut ◽  
Polyphenolic Content ◽  
Castanea Sativa Mill ◽  
Total Polyphenolic Content ◽  
First Time

Sweet chestnuts (Castanea sativa Mill.) are highly prized nuts, and the consumption of fresh chestnuts is usually preceded by roasting, boiling, and frying. The aim of this work was to simultaneously analyze 29 polyphenolic compounds for the first time in raw, boiled, roasted, and fried chestnut seeds and shells using HPLC-MS/MS. Principal component analysis depending on the HPLC-MS/MS results showed that roasting, boiling, and frying affected the contents of 25 detected phenolic compounds in a unique way, of which the most notable phenolics were gallic acid, ellagic acid, and (+)-catechin. Additionally, total polyphenolic content (TPC) was measured via the Folin–Ciocalteu method, and TPC in seeds and inner and outer shells was increased in all treatments except for microwave-roasted seeds. Furthermore, the higher TPC in the inner and outer shells when compared to seeds supported their higher antioxidant activity (AOA) determined via the DPPH experiment. AOA of seeds was increased in all treatments, while the AOA of shells was higher in roasting and lower in boiling and frying treatments. The assessment of these changes is necessary so that chestnut seed consumption and the recycling of their shells as a natural source of antioxidants can be maximized.

scholarly journals Rapid and Sensitive Method for Extraction of Plicosepalus acacia with Determination of Its Main Polyphenolic Compounds Using Validated HPLC

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Mashail N. AlZain ◽  
Rashed N. Herqash ◽  
Abdulaziz N. Almoqbil ◽  
Omer Mohammed Almarfadi ◽  
Mansour N. Ibrahim ◽  
...  
Keyword(s):  
Silica Gel ◽  
Solid Phase ◽  
Polyphenolic Compounds ◽  
Mass Ratio ◽  
Sample Mass ◽  
Matrix Solid Phase Dispersion ◽  
Time Sample ◽  
Phase Dispersion ◽  
Sensitive Method

Matrix solid phase dispersion (MSPD) trailed by HPLC is a quick and fruitful technique utilized for fortitude of flavonoids such as Catechin, Kaempferol, Quercetin, and Rutin existing in P. acacia. The trial parameters that influenced the extraction potential (comprising the mass ratio of sample to the dispersant, nature of dispersant, and the nature of elution solvent and its volume) were examined and optimized. These MSPD optimized parameters regulated are as follows: 8 mL of methanol was utilized as elution solvent, silica gel/sample mass ration was selected to be 2 : 1, and dispersing sorbent was silica gel. The technique retrievals were regulated to be “from 96.87 to 100.54%” and the RSDs from 1.24 to 4.45%. The product of extract obtained by MSPD method was larger than that of other methods, i.e., sonication extraction or traditional reflux with lessened necessities on time, sample, and solvent.

Carbon molecular sieve based micro-matrix-solid-phase dispersion for the extraction of polyphenols in pomegranate peel by UHPLC-Q-TOF/MS

2018 ◽  
Vol 39 (17) ◽  
pp. 2218-2227 ◽  
Author(s):  
Li-Jing Du ◽  
Jian-Ping Huang ◽  
Bin Wang ◽  
Chen-Hui Wang ◽  
Qiu-Yan Wang ◽  
...  
Keyword(s):  
Molecular Sieve ◽  
Solid Phase ◽  
Carbon Molecular Sieve ◽  
Pomegranate Peel ◽  
Matrix Solid Phase Dispersion ◽  
Phase Dispersion ◽  
Tof Ms

scholarly journals Electrochemical Methods and (Bio) Sensors for Rosmarinic Acid Investigation

Chemosensors ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 74
Author(s):  
Iulia Gabriela David ◽  
Dana Elena Popa ◽  
Mihaela Buleandră ◽  
Mihaela Carmen Cheregi
Keyword(s):  
Antioxidant Activity ◽  
Dynamic Systems ◽  
Phenolic Acid ◽  
Rosmarinic Acid ◽  
Electrochemical Methods ◽  
Redox Active ◽  
Polyphenolic Content ◽  
Total Polyphenolic Content ◽  
Electroactive Species ◽  
Electrochemical Methods Of Analysis

Rosmarinic acid (RA) is an important bioactive phenolic acid with significant biochemical activities, including the antioxidant one. It is widely found in plants of the families Lamiaceae and Boraginaceae and has many uses in the food, pharmaceutical and cosmetics industries. RA is an electroactive species owing to the presence of the two catechol groups in its structure. Due to their inherent characteristics, such as sensitivity, selectivity, ease of operation and not too high costs, electrochemical methods of analysis are interesting tools for the assessment of redox-active compounds. Moreover, there is a good correlation between the redox potential of the analyte and its capability to donate electrons and, consequently, its antioxidant activity. Therefore, this paper presents a detailed overview of the electrochemical (bio)sensors and methods, in both stationary and dynamic systems, applied for RA investigation under different aspects. These comprise its antioxidant activity, its interaction with biological important molecules and the quantification of RA or total polyphenolic content in different samples.

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