scholarly journals Sustainable Management of Fruit Growing in Rural Areas of Montenegro: The Impact of Location on the Phenological and Nutritional Properties on Raspberry (Rubus idaeus L.)

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1663
Author(s):  
Dejan Zejak ◽  
Ivan Glisic ◽  
Velibor Spalevic ◽  
Pavle Maskovic ◽  
Branislav Dudic
Keyword(s):  
Rural Areas ◽  
General Rule ◽  
Optimal Growth ◽  
Rubus Idaeus ◽  
Total Phenol ◽  
Total Phenol Content ◽  
Mountainous Area ◽  
Total Flavonoids ◽  
Phenol Content ◽  
The Impact

The physical-geographical features of the mountainous area of Montenegro cause difficulties in farmers’ life and work. The organization of the agricultural production faces a number of problems that limit the overall development of rural areas. Some agricultural crops, such as raspberry, have found optimal growth conditions and produce appropriate yields associated with good fruit quality in such mountainous area. The Willamette variety dominates the production and has broadly expanded, as some new varieties, most notably, Tulameen, Fertȍdi Zamatos, and Glen Ample. The aim of this paper was to examine the biological and production characteristics of two raspberry varieties—one floricane (Tulameen) and one primocane (Polka)—grown in two localities. We confirmed the general rule that at lower altitudes, these varieties (570 m a.s.l, Bijelo Polje) are characterized by earlier vegetation, flowering, and fruit ripening in comparison to plants at higher altitude (1040 m a.s.l, Mojkovac). The Tulameen variety started flowering on 15 May in Bijelo Polje (the flowering phenophase lasted for 29 days, until 12 June) and on 25 May in Mojkovac (the flowering phenophase lasted for 27 days, until 20 June). That is a delay of 11 days in relation to different locations. The Polka variety started flowering on 25 June in Bijelo Polje (57 days, until 20 August) and on 1 July in Mojkovac (flowering for 67 days, until 5 September). That is a delay of 7 days. The Tulameen variety started maturation on 14 June in Bijelo Polje (maturation lasted for 27 days, until 10 July) and on 22 June in Mojkovac (26 days, until 17 July), with a delay of 9 days. The Polka variety started maturation on 23 July in Bijelo Polje (the maturation phenophase lasted for 55 days, until 15 September) and on 5 August in Mojkovac (52 days, until 25 September), with a delay of 14 days. The results showed that the Polka variety had significantly higher total phenol content than the Tulameen variety (4.43 and 4.03 mg, respectively). In terms of locality, the Mojkovac raspberries had higher total phenol content than the Bijelo Polje raspberries. Polka raspberries also had a higher content of total flavonoids than Tulameen, whereas differences between localities in regard to the content of total flavonoids in the fruit were not significant. The content of condensed tannins and gallotannins in the raspberry fruit was similar in relation to both varieties and localities. Finally, the total antioxidant capacity was significantly higher in the Polka compared to the Tulameen variety, whereas the differences between localities were not statistically significant.

scholarly journals Synergism of Antioxidant Activity Combination of Buas-Buas (Premnaserratifolia Linn.), Meniran (Phyllanthusniruri L.), Secang (Caesalpiniasappan) and Roselle (Hibiscus sabdarifa) Extracts

2020 ◽  
Vol 25 (3) ◽  
Author(s):  
Isnindar Isnindar ◽  
Sri Luliana
Keyword(s):  
Antioxidant Activity ◽  
Radical Scavenging ◽  
Total Phenol ◽  
Total Phenolic ◽  
Total Phenol Content ◽  
Total Flavonoids ◽  
Phenol Content ◽  
Flavonoid Content ◽  
Ic50 Values ◽  
Phenolic And Flavonoid

Buas-buas, meniran, secang, and rosella have biological and pharmacological activities as antioxidants. The combination of the four plants is expected to provide a more potent synergistic effect on antioxidant activity. The purpose of this study was to analyze the total phenol content, total flavonoids, and antioxidant effects before and after combination. The combination of extracts, buas-buas, meniran, secang, and rosella which are used in sequence is (1: 1: 1/2: 1/2), (1: 2: 1/2: 1/2), and (2: 1 : 1/2: 1/2). Plants used in the form of simplicia was extracted by maceration method. Radical capture activity uses DPPH and IC50 values are determined. Determination of total phenol is expressed equivalent to gallic acid. Total flavonoids are expressed as quercetin equivalents. The phenol and flavonoid content obtained are then correlated with antiradical activity. The results showed that the best IC50 values were in the combination of ratios (1: 1: 1/2: 1/2) that is (11.0 µg / mL), then (1: 2: 1/2: 1/2) which was 13.3 µg / mL, and (2: 1: 1/2: 1/2) which is 19.4 µg / mL. The highest total phenolic and flavonoid content in the ratio (1: 2: 1/2: 1/2) is 33.57% w/w EAG and 74.00% w/w EQ. Correlation analysis between IC50 values with total phenolic and flavonoid contents showed a positive correlation with R2 values of 0.8236 and 0.0102 with positive slope. Thus, it can be concluded that the total phenol content influences free radical scavenging activity by 82.36%, while the effect of total flavonoid content was only 1.02%.

Evaluation of virgin olive oil bitterness by total phenol content analysis

2007 ◽  
Vol 109 (3) ◽  
pp. 193-197 ◽  
Author(s):  
Gabriel Beltrán ◽  
María T. Ruano ◽  
Antonio Jiménez ◽  
Marino Uceda ◽  
María P. Aguilera
Keyword(s):  
Content Analysis ◽  
Olive Oil ◽  
Virgin Olive Oil ◽  
Total Phenol ◽  
Total Phenol Content ◽  
Phenol Content

scholarly journals Total Phenol Content and Antimicrobial Activity of Lingonberry (Vaccinium vitis-idaea L.) from Several Areas in the Eastern Carpathians

2017 ◽  
Vol 9 (1) ◽  
pp. 77-83 ◽  
Author(s):  
Éva LASLO ◽  
Zoltán Attila KÖBÖLKUTI
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Effect ◽  
Bioactive Compound ◽  
Total Phenol ◽  
Total Phenol Content ◽  
Phenol Content ◽  
Eastern Carpathians ◽  
Spoilage Bacteria ◽  
New Perspective ◽  
Similar Growth

This study evaluated the antimicrobial activity and the total phenol content of Vaccinium vitis idaea L. berry fruit from five different localities with distinct growth sites in the Eastern Carpathians. The antibacterial effect of lingonberry was studied on nine selected Gram-positive and negative, foodborne, illness causing and spoilage bacteria. The total phenol content was estimated by the Folin-Ciocalteu method. The present results showed stronger antibacterial effect of lingonberry on Gram-negative bacteria, especially on Pseudomonas fluorescens and Pseudomonas aeruginosa. The total phenol content varied between 3.72 and 2.1 mM GAE/ml. As data suggested, Vaccinium vitis-idaea fruits originating from different geographic regions and environment, differ from each other in terms of bioactive compound quantity and activity. In the selection of new perspective cultivars of lingonberry, the geographical origin of fruits must be considered. Two Step Cluster analysis detected relatively well supported relationship between samples provided from similar growth sites. Correlation analysis showed no correlation between altitude, phenol content and antimicrobial activity.

scholarly journals Antioxidant activity and total phenolic content in Caulerpa filiformis (Chlorophyta) from Sechura Bay and Paracas Bay, Peru

2020 ◽  
Vol 27 (1) ◽  
pp. 061-066 ◽  
Author(s):  
Joyce Mamani ◽  
Jorge Chávez ◽  
Eder Apumayta ◽  
Patricia Gil-Kodaka
Keyword(s):  
Antioxidant Activity ◽  
Secondary Metabolites ◽  
Methanolic Extract ◽  
Total Phenol ◽  
North Coast ◽  
Total Phenolic ◽  
Total Phenol Content ◽  
Phytochemical Screening ◽  
Phenol Content ◽  
The North

In Peru, Caulerpa filiformis is a marine algae listed as an invasive species. For years, its distribution has been considered to be in the north coast (Isla Lobos de Afuera and Piura) until a recent report of its distribution in the central coast (Ancash, Lima, and Ica). The present investigation aims to determine the main groups of secondary metabolites, total phenol content, and antioxidant activity of the methanolic extract of C. filiformis from Sechura Bay (Piura) and Paracas Bay (Ica). The main chemical groups were determined through phytochemical screening, the content of phenols by the Folin–Ciocalteu method, and antioxidant activity by the ABTS method (2,2-azinobis-[3-ethylbenzothiazoline-6-sulfonic acid]) and 2,2′-diphenyl-1-picrylhydrazyl (DPPH). The phytochemical screening of the methanolic extract of C. filiformis from Sechura Bay and Paracas Bay revealed the presence of carbohydrates, polyphenols, tannins, flavonoids, lipids, alkaloids, steroids, and triterpenes for both extracts. The total phenol content of the extract of C. filiformis from Sechura Bay (39.31 ± 0.39 mg of AGE/g extract) was significantly higher (p < 0.05) than that from Paracas Bay (18.78 ± 0.31 mg of AGE/g extract). In the ABTS and DPPH assays, the antioxidant capacity of the Sechura C. filiformis extract (IC50 = 3.49 ± 0.01 and 2.18 ± 0.02 mg/mL) was significantly higher (p < 0.05) than that of the Paracas C. filiformis extract (IC50 = 6.41 ± 0.02 and 2.42 ± 0.04 mg /mL). These findings suggest that the methanolic extract of C. filiformis is a source of secondary metabolites with an antioxidant potential.

scholarly journals Prediction of Total Phenolic Content in Extracts of Prunella Species from HPLC Profiles by Multivariate Calibration

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Saliha Sahin ◽  
Esra Isik ◽  
Cevdet Demir
Keyword(s):  
High Performance ◽  
Multivariate Calibration ◽  
Principal Component Regression ◽  
Principal Component ◽  
Total Phenol ◽  
Total Phenolic ◽  
Total Phenol Content ◽  
Phenol Content ◽  
Calibration Methods ◽  
Hplc Profiles

The multivariate calibration methods—principal component regression (PCR) and partial least squares (PLSs)—were employed for the prediction of total phenol contents of four Prunella species. High performance liquid chromatography (HPLC) and spectrophotometric approaches were used to determine the total phenol content of the Prunella samples. Several preprocessing techniques such as smoothing, normalization, and column centering were employed to extract the chemically relevant information from the data after alignment with correlation optimized warping (COW). The importance of the preprocessing was investigated by calculating the root mean square error (RMSE) for the calibration set of the total phenol content of Prunella samples. The models developed based on the preprocessed data were able to predict the total phenol content with a precision comparable to that of the reference of the Folin-Ciocalteu method. PLS model seems preferable, because of its predictive and describing abilities and good interpretability of the contribution of compounds to the total phenol content. Multivariate calibration methods were constructed to model the total phenol content of the Prunella samples from the HPLC profiles and indicate peaks responsible for the total phenol content successfully.

scholarly journals Strawberry jams: influence of different pectins on colour and textural properties

2009 ◽  
Vol 27 (No. 1) ◽  
pp. 20-28 ◽  
Author(s):  
M. Kopjar ◽  
V. Piližota ◽  
N.N. Tiban ◽  
D. Šubarić ◽  
J. Babić ◽  
...  
Keyword(s):  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Textural Properties ◽  
Total Phenol ◽  
Total Phenol Content ◽  
Anthocyanin Content ◽  
Phenol Content ◽  
Quality Properties ◽  
Texture Parameters ◽  
Important Quality

Colour and texture are very important quality properties of all foods. In this work, the influence was investigated of different types of pectin on colour and textural properties in strawberry jams and low-calorie strawberry jams containing fructose and aspartame or fructose syrup and aspartame. The highest anthocyanin content and total phenol content were detected in strawberry jam samples prepared with low methoxy amidated pectin. During storage, after 4 and 6 weeks at both storage temperatures, room temperature and 4°C, anthocyanin content and total phenol content decreased. Also, free radical scavenging activity decreased during storage. As far as the texture parameters are concerned, namely firmness, consistency and cohesiveness, the highest values were found in strawberry jam samples prepared with high methoxyl pectin.

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