scholarly journals Quantitative and Qualitative Identification of Bioactive Compounds in Edible Flowers of Black and Bristly Locust and Their Antioxidant Activity

Biomolecules ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1603
Author(s):  
Ewelina Hallmann
Keyword(s):  
Antioxidant Activity ◽  
Bioactive Compounds ◽  
Dry Matter ◽  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Green Areas ◽  
The Status ◽  
Total Anthocyanins ◽  
Excellent Source

Black and bristly locust flowers are an excellent source of polyphenols, including flavonols, phenolic acids, and anthocyanins. In the present literature, there is a lack of studies showing the quantity and quality of phenolic compounds from different locust flowers. There are a few studies on the status of polyphenols in black locust flowers and their products but not bristly locusts. The aims of this study were to analyze and compare the concentrations of bioactive compounds from Robinia pseudoacacia and Robinia hispida flowers over two years. These two species of plants from six independent locations (parks and green areas) located in Warsaw were assessed in this study. The dry matter and polyphenol contents of the flowers were determined. Black locust flower samples contained significantly more myricetin and luteolin. Only bristly locust flowers contained anthocyanins. Five individual anthocyanins were identified in the pink-colored bristly locust flowers. Pelargonidin-3-O-glucoside and cyanidin-3-O-glucoside were the predominant forms in the pool of total anthocyanins.

scholarly journals The Dynamic of Polyphenols Concentrations in Organic and Conventional Sour Cherry Fruits: Results of a 4-Year Field Study

Molecules ◽  
2020 ◽  
Vol 25 (16) ◽  
pp. 3729
Author(s):  
Agnieszka Głowacka ◽  
Elżbieta Rozpara ◽  
Ewelina Hallmann
Keyword(s):  
Bioactive Compounds ◽  
Dry Matter ◽  
Scientific Literature ◽  
Sour Cherry ◽  
Total Flavonoids ◽  
Total Polyphenols ◽  
Organic Farm ◽  
Predominant Form ◽  
The Status ◽  
Total Anthocyanins

Sour cherry fruits are a perfect source of polyphenols, including flavonols, phenolic acids and anthocyanins. According to the literature, organic fruits contain more bioactive compounds, especially polyphenols, compared to conventional fruits. Given that only one two-year experiment on the status of polyphenols in sour cherry fruits in an organic farm was previously conducted and found in the existing scientific literature, the aim of this study was to analyse and compare the concentration of bioactive compounds in organic and conventional sour cherries and to determine the effects of cultivation year and the proper cultivar. Four sour cherry cultivars (“Oblacińska”, “Kelleris 16”, “Pandy 103” and “Dobroceni Bötermo”) harvested in organic and conventional experimental orchards were assessed in this study. The dry matter and polyphenol contents in the fruits were determined. We observed a significantly higher concentration of dry matter in organic samples only in 2015 and 2017. In the case of total polyphenols, including phenolic acid (2015 and 2017–2018), and total flavonoids, including quercetin-3-O-rutinoside, the higher concentration was found in 2016 and 2018. Two individual anthocyanins were identified in sour cherry fruits. Cyanidin-3-O-rutinoside is the predominant form in the pool of total anthocyanins.

scholarly journals An Investigation of Moroccan Vinegars: Their Physicochemical Properties and Antioxidant and Antibacterial Activities

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Driss Ousaaid ◽  
Hamada Imtara ◽  
Hassan Laaroussi ◽  
Badiaa Lyoussi ◽  
Ilham Elarabi
Keyword(s):  
Physicochemical Properties ◽  
Bioactive Compounds ◽  
Antibacterial Activities ◽  
Storage Conditions ◽  
Production Methods ◽  
Maximum Value ◽  
Processing And Storage ◽  
And Storage ◽  
Excellent Source

Vinegar is a natural product rich in bioactive compounds such as phenols, flavonoids, and organic acids. Several factors affect the quality of vinegars such as apple origin, environmental conditions, production methods, processing, and storage conditions. We investigated the quality of apple vinegars as well as their physicochemical properties and the antioxidant and antibacterial activities of vinegars collected from different areas in Morocco. For physicochemical properties, the outcomes showed the following values: pH (3.18–3.83), electrical conductivity (2.11–2.90), acidity (0.24–5.6), Brix (3.25–6), and density (1.0123–1.0233). The polyphenols content of samples was 68.91 mg AG/100 mL in sample S6 as the minimum value and 147.54 mg AG/100 mL in sample S2 as the maximum value. The best ability to scavenge the DPPH radical was observed in sample S3 (IC50 = 0.45 ± 0.013 µL/mL). Sample S2 showed moderate antibacterial effect against microorganisms tested with MICs ranging from 0.78 µL/mL to 1.125 µL/mL and with a diameter of inhibition ranging from 15.65 mm to 27.65 mm. In addition, a strong correlation was observed between the antibacterial activity of vinegars and physicochemical parameters (pH and total acidity). These outcomes have shown that our vinegar samples are an excellent source of bioactive compounds with potent antioxidant and antibacterial potentials.

scholarly journals HPLC Fingerprint of Bioactive Compounds and Antioxidant Activities of Viscum album from Different Host Trees

2011 ◽  
Vol 39 (1) ◽  
pp. 48 ◽  
Author(s):  
Simona Ioana VICAŞ ◽  
Olivia Dumitrita RUGINA ◽  
Loredana LEOPOLD ◽  
Adela PINTEA ◽  
Carmen SOCACIU
Keyword(s):  
Antioxidant Activity ◽  
Bioactive Compounds ◽  
Malus Domestica ◽  
Dry Matter ◽  
Total Phenolics ◽  
Antioxidant Activities ◽  
Viscum Album ◽  
Fraxinus Excelsior ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Host Trees

Viscum album L. is a medicinal plants used for many years as a remedy in the traditional medicine and in complementary cancer therapies. We investigated the influence of some host trees: Acer campestre (VAA), Fraxinus excelsior (VAF), Populus nigra (VAP), Malus domestica (VAM), and Robinia pseudoacacia (VAR), on the chemical composition and antioxidant activity of leaves and stems from V. album, as well the influence of the solvent (water and ethanol) used for extraction on biological activity. HPLC with photodiode array detector analysis of bioactive compounds from leaves and stems of mistletoes (V. album) hosted by five differents trees was performed. Antioxidant activities, determined by the 2,2-diphenyl-1-picrylhydrazyl (DPPH), Oxygen Radical Absorbance Capacity (ORAC), (Trolox-equivalent antioxidant capacity (TEAC) methods were compared with the quantification of total phenolics using the Folin -Ciocalteu reagent. V. album hosted by Fraxinus excelsior (VAF), recorded the highest level of total phenolic acids (108.64 μg/g dry matter) while the mistletoe hosted by Malus domestica (VAM) had the lowest level of total polyphenols (39.37 μg/g dry matter). In general, higher antioxidant activity was detected in the alcoholic than in the aqueous extracts. The values obtained for total phenolics in both, aqueous and ethanol extracts, decreased in the order: VAR > VAF > VAP > VAA > VAM. The mistletoe stem extracts contained lower levels of phenolics, as compared to leaves, in both solvents. Our results suggest that mistletoe extracts possess significant antioxidant activities that may be due to their bioactive compounds content, suggesting that this plant may be an important source of natural products with chemopreventive and chemotherapeutic activities.

scholarly journals Changes in Bioactive Compounds, Antioxidant Activity, and Nutritional Quality of Blood Orange Cultivars at Different Storage Temperatures

Antioxidants ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1016
Author(s):  
Fariborz Habibi ◽  
Asghar Ramezanian ◽  
Fabián Guillén ◽  
Salvador Castillo ◽  
María Serrano ◽  
...  
Keyword(s):  
Antioxidant Enzymes ◽  
Bioactive Compounds ◽  
Nutritional Quality ◽  
Prolonged Storage ◽  
Storage Duration ◽  
Total Anthocyanins ◽  
Phenolics Content ◽  
Storage Temperatures ◽  
Blood Orange

Information about the postharvest physiological behavior of blood orange cultivars can provide comprehensive insight into the best period of storage to maintain the highest fruit quality during prolonged cold storage. In this paper, changes in nutritional quality, bioactive compounds, and antioxidant enzymes in the juice of four blood orange cultivars (“Moro”, “Tarocco”, “Sanguinello”, and “Sanguine”) stored at 2 and 5 °C were studied. Parameters were measured after 0, 30, 60, 90, 120, 150, and 180 days, plus 2 days at 20 °C for shelf life. Sucrose was the sugar found in higher concentrations and decreased during storage in all cultivars, as did glucose and fructose. Organic acids decreased at both temperatures, with the highest content found in “Sanguinello”, especially major (citric acid) and ascorbic acid. Total phenolics content (TPC), total anthocyanins (TAC), and individual cyanidin 3-glucoside and cyanidin 3-(6″-malonylglucoside) increased for all cultivars, with “Sanguinello” having higher concentrations. The antioxidant enzymes catalase (CAT), ascorbate peroxidase (APX), and superoxide dismutase (SOD) were also higher in “Sanguinello” and increased during storage. Overall, these results together with the sensory analysis suggested that “Sanguinello” would be the best cultivar for prolonged storage. The results of this study could be useful to select the best storage duration and temperature for each cultivar and provide the presence of such a high-value commodity for fresh consumption or juice processing long after the harvest season.

scholarly journals ANTIOXIDANT ACTIVITY AND ISOLATION BIOACTIVE COMPOUNDS FROM ROSELLE (HIBISCUS SABDARIFFA) FROM VARIOUS METHODS AND DRYING TIME

AGROINTEK ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 1
Author(s):  
Ike Sitoresmi mulyo Purbowati ◽  
Sujiman Sujiman ◽  
Ali Maksum
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Bioactive Compounds ◽  
Drying Methods ◽  
Hibiscus Sabdariffa ◽  
Drying Time ◽  
Radical Trapping ◽  
Direct Exposure ◽  
Total Anthocyanins ◽  
Antioxidant Agent

The focus of this study was to evaluate the effect of different drying methods and drying level on the bioactive compounds of roselle (Hibiscus sabdariffa L.)as antioxidant agent. The experiment has been conducted in cabinet dryer and by a direct exposure on sun light as weel as by using a green house effect panel with duration of driying: 1, 3, 5, 7 hours. The observed parameters were Colour, levels of anthocyanins,vitamin C, and free radical trapping capacity (DPPH). The data obtained were analyzed using analysis of variance (ANOVA) and further test DMRT (Duncant Multiple Range Test). The best results from these study was the cabinet drying with 7 h of drying time which have value for color (L, a*, b*), total anthocyanins, vitamin C, and antioxidant activity in respective order were 21.633; 6.80; 4.53; 3.22mg/100g; 1238.29mg/100g; 74,63%.

scholarly journals EFFECT OF ORGANIC FERTILIZATION ON THE QUANTITY AND QUALITY OF MELON PRODUCTION

2019 ◽  
pp. 176-183
Keyword(s):  
Antioxidant Activity ◽  
Dry Matter ◽  
Organic Fertilizer ◽  
Plant Production ◽  
Average Weight ◽  
Conventional Farming ◽  
Dpph Method ◽  
Positive Correlations ◽  
Alternative Practices

Growing environmental impact of conventional farming practices, gradually impacts soil structure and biological balance. This has forced the development of alternative practices to reduce and mitigate these effects. Types of fertilizers influence the quantity and quality of production. Following this idea, in 2016, in a crop of melon in a polyethylene tunnel, Lignohumat organic fertilizer was used, a granular humic product, which was applied during vegetation, in three stages and three fertilization doses: 100; 150 and 200 g/ha. Melon plants (Charentais variety) fertilized with Lignohumat at different doses showed positive results compared to the unfertilized variant. Results showed that application of the 150 g/ha dose significantly improved (P ≤ 0.05) the average number of fruits/plants, their average weight, fruit/plant production and the production/m2 but also the quality of fruits: soluble dry matter – 8.55%, total dry matter – 12.12%, reducing sugars – 3.40%, vitamin C - 21.12 mg/100 g, carotene - 36.42 mg/100 g f.m and antioxidant activity of 175.92 μMTE/100 g (ABTS method) and 228.16 μMTE/100 g (DPPH method). Antioxidant activity was evaluated using 2.2-diphenyl-1-picrylhydrazyl (DPPH) 2.2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid (ABTS). Significant positive correlations were identified for very importants parameters.

scholarly journals Bioactive compound retention in frozen red and yellow Strawberry guava pulps added with L-Ascorbic acid

2018 ◽  
Vol 40 (6) ◽  
Author(s):  
Lisiane Pintanela Vergara ◽  
Gabriela Niemeyer Reissig ◽  
Rodrigo Cezar Franzon ◽  
Rosane da Silva Rodrigues ◽  
Josiane Freitas Chim
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Bioactive Compounds ◽  
Frozen Storage ◽  
Bioactive Compound ◽  
Freezing Process ◽  
Limiting Factor ◽  
Protective Agent ◽  
Total Carotenoids ◽  
Total Anthocyanins

Abstract Brazil presents a great variety of native fruits, which have aroused commercial interest, such as the strawberry guava. In this sense, many researches have looked for alternatives that allow postharvest availability of fruits, considering that perishability is a limiting factor for its commercialization. The freezing process is an important alternative in the sense of making these fruits available for longer on the market. The use of L-ascorbic acid is a potent protective agent in the stability of bioactive compounds in fruit pulps. The objective of this study was to evaluate potentially bioactive compounds present in red and yellow strawberry guava pulps added with L-ascorbic acid (1% m / m) and verify its effect on retention of these compounds and in its antioxidant activity during the frozen storage (-20 ± 2ºC). In the pulps were analyzed: antioxidant activity by the capture of the DPPH° and ABTS° radicals, phenols, anthocyanins and total carotenoids. L-ascorbic acid positively influences the retention of bioactive compounds (total phenols, total anthocyanins and total carotenoids) in red and yellow strawberry guava pulps during 120 days of frozen storage (-20 ± 2 ºC).

Antioxidative Capacity of and Contaminant Concentrations in Processed Plum Products Consumed in Romania

2018 ◽  
Vol 81 (8) ◽  
pp. 1313-1320 ◽  
Author(s):  
OANA E. CONSTANTIN ◽  
GABRIELA RÂPEANU ◽  
KRISTINA KUKUROVÁ ◽  
MIHAELA TURTURICĂ ◽  
ZUZANA DUBOVÁ ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Bioactive Compounds ◽  
Dry Matter ◽  
Quality And Safety ◽  
Total Phenols ◽  
Total Polyphenols ◽  
Total Polyphenol ◽  
Limit Of Quantitation ◽  
Thermally Processed ◽  
Gallic Acid Equivalent

ABSTRACTThe bioactive compounds (total phenols, anthocyanins, and flavonoids) and antioxidant activity of plum-based products (prunes, jams, and marmalade) were evaluated based on spectrophotometric assays and acrylamide and 5-hydroxymethyl-2-furaldehyde concentrations to determine the quality and safety of these products in the Romanian marketplace. The total polyphenol concentrations in prunes, marmalade, and jams were 0.93 to 5.63 g of gallic acid equivalent per kg of dry matter, and the antioxidant activity was 3.0 to 17.2 mmol/kg. The concentrations of potentially harmful acrylamide in the plum products ranged from the limit of quantitation (<20 μg/kg) to 37.44 μg/kg, and the concentration was higher in prunes (26.66 to 163.72 μg/kg) than in jams. The 5-hydroxymethyl-2-furaldehyde concentrations in plum products were also variable, at 36 to 2,149 mg/kg. These data revealed a very low concentration of acrylamide in thermally processed plum products, and the results for total polyphenols and the antioxidant activity of prunes and plum jams may be relevant for evaluating these products as important sources of bioactive compounds.

scholarly journals Influence of Regeneration Method on the Yield and Stem Quality of Black Locust (Robinia pseudoacacia L.) Stands: a Case Study

2012 ◽  
Vol 8 (1) ◽  
pp. 103-112 ◽  
Author(s):  
Károly Rédei ◽  
Imre Csiha ◽  
Zsolt Keserű ◽  
János Gál
Keyword(s):  
Black Locust ◽  
Robinia Pseudoacacia ◽  
Forest Tree ◽  
Wood Production ◽  
Stem Quality ◽  
Medium Quality ◽  
Robinia Pseudoacacia L ◽  
Root Suckers

Abstract - Black locust (Robinia pseudoacacia L.) is one of the most important forest tree species in Hungary, covering approximately 23% of the forested land and providing 25% of the annual timber output of the country. One third of these black locust stands are high forests (planted with seedlings) and the remainder coppices. According to the forestry regulations black locust stands can be regenerated both by root suckers and with seedlings in Hungary. This study investigates the influence of different regeneration methods on wood production, stem quality and health. Properly managed regeneration from root suckers produced a higher yield than regeneration from seedlings at a harvest age of 35-37 years. The results show that regeneration of black locust stands from root suckers can be recommended on good and medium quality sites without a decrease in yield or stem quality.

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