Chemical Composition of Seed Propagated Chestnut Genotypes from Northeastern Turkey

Turkey ranked third place in the world for chestnut production after China and Bolivia and the country has unique chestnut populations including valuable and diverse seed propagated chestnut genotypes. In this study, chestnuts (Castanea sativa) were collected during the 2016 harvest season from Northeastern part of Turkey from promising 12 different seedling origin genotypes. Tree growth habit, nut weight, kernel ratio, kernel color, moisture, crude protein, crude fat, dietary fiber, total polyphenols, antioxidant activity and fatty acid content of fruits belongs to 12 genotypes were determined. The results showed that, the majority of genotypes had semi upright tree growth habit. The nut weight and kernel ratio were between 5.05 g (K-10) and 10.10 g (K-5) and 71.10% (K-1) and 82.44% (K-3) among genotypes. The total crude fat content ranged from 0.87% (K-7) to 2.61% (K-1) while the crude protein ranged from 4.80% (K-7) to 7.65% (K-1). The dietary fiber content made up no more than 3.61% of the remaining portion of the kernel. It was found that total polyphenols was between 1.66 and 2.70 g GAE/kg and antioxidant activity was between 5.80 and 9.07 μmol Trolox equivalent/g dry weight basis. Oleic and linoleic acid were the major fatty acids in all chestnut fruits and followed by palmitic and linolenic acid. The results showed that there was enough variations among seed propagated chestnut genotypes for most of the searched parameters and this highlights the importance of conserving the genotypes, as their high levels of heterogeneity allow them to respond to abiotic and biotic stresses and adapt to low-input farming systems.

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Comparative Assessment of the Basic Chemical Composition and Antioxidant Activity of Stevia rebaudiana Bertoni Dried Leaves, Grown in Poland, Paraguay and Brazil—Preliminary Results

Applied Sciences ◽

10.3390/app11083634 ◽

2021 ◽

Vol 11 (8) ◽

pp. 3634

Author(s):

Teresa Leszczyńska ◽

Barbara Piekło ◽

Aneta Kopeć ◽

Benno F. Zimmermann

Keyword(s):

Antioxidant Activity ◽

Chemical Composition ◽

Vitamin C ◽

Dietary Fiber ◽

Radical Scavenging Activity ◽

Radical Scavenging ◽

Stevia Rebaudiana ◽

Steviol Glycosides ◽

Total Polyphenols ◽

Stevia Rebaudiana Bertoni

This study compares the content of basic nutrients (proteins, fats, digestible carbohydrates, dietary fiber and ash), steviol glycosides, selected antioxidants (vitamin C, total polyphenols) and antioxidant activity in dried leaves of Stevia rebaudiana Bertoni cultivated in Poland, Paraguay and Brazil and available in the direct sale. The basic chemical composition was determined by standard AOAC (Association of Official Analytical Chemists) methods. Content of steviol glycosides was determined by the UHPLC-UV chromatographic method. Total polyphenols content was expressed as gallic acid equivalent (GAE) and catechins equivalent (CE). Antioxidant activity was measured as ABTS●+ free radical scavenging activity. Dried leaves of S. rebaudiana grown in Poland had significantly higher contents of dietary fiber, and lower protein and ash content, compared to those derived from Paraguay and Brazil. The former had, however, considerably higher contents of total steviol glycosides, stevioside and rebaudioside D, compared to the remaining two plants. In the Paraguay-derived dried leaves, the content of rebaudioside A, C, E and rubusoside was found to be significantly lower. Dried leaves of S. rebaudiana Bertoni, cultivated in Poland, contained substantially more vitamin C and a similar content of total polyphenols, compared to those from Brazil and Paraguay. The examined material from Brazil and Paraguay plantations showed similar antioxidant activity, while that obtained from Polish cultivation was characterized by a significantly lower value of this parameter.

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Utilisation of non-traditional forms of cereals in bakery production

Czech Journal of Food Sciences ◽

10.17221/245/2013-cjfs ◽

2014 ◽

Vol 32 (No. 3) ◽

pp. 296-301 ◽

Cited By ~ 1

Author(s):

I. Laknerová ◽

M. Holasová ◽

V. Fiedlerová ◽

J. Rysová ◽

VaculováK ◽

...

Keyword(s):

Antioxidant Activity ◽

Dietary Fiber ◽

Common Wheat ◽

Nutritional Quality ◽

Raw Materials ◽

Cereal Grains ◽

Processing Quality ◽

Total Polyphenols ◽

Total Dietary Fiber ◽

Nutrient Contents

One form of common wheat with yellow coloured grain, two forms of emmer wheat, and two forms of barley with hulless grain were used for the preparation of bread with enhanced nutritional quality. The following mill products were prepared from the cereal grains: wholemeal flour, break flour, barley grits, and break bran. The contents of thiamin, niacin, pyridoxine, total polyphenols, and total dietary fiber were studied in these raw materials and bread samples. Further, in the bread samples, the antioxidant activity was assessed and sensory evaluation was performed. As a result, the utilisation of the non-traditional forms of cereals improved nutrient contents of bread while maintaining very good sensory characterising and processing quality.

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Total Phenolic Content and Antioxidant Activity of Two Teucrium Species from Syria -

Journal of Pharmacy and Nutrition Sciences ◽

10.29169/1927-5951.2020.10.01.7 ◽

2020 ◽

Vol 10 (1) ◽

pp. 41-45

Author(s):

Reem Ghassan Alali ◽

Mays Rizk Khazem

Keyword(s):

Antioxidant Activity ◽

Radical Scavenging Activity ◽

Radical Scavenging ◽

Dry Weight ◽

Total Phenolic ◽

Natural Food ◽

Antioxidant Compounds ◽

Scavenging Activity ◽

Total Polyphenols

Germander (Teucrium, Lamiaceae) is a genus commonly used as a medicinal herb in the middle east. The aim of this study was to estimate total polyphenols and antioxidant activity of different extracts from two Syrian Teucrium species (Teucrium polium and Teucrium creticum). Total polyphenols content was measured using Folin-Ciocalteu assay and the antioxidant activity was evaluated in vitro by DPPH assay (free radical scavenging activity against 1, 1 –diphenyl-2-picrylhydrazyl). The total polyphenols content and antioxidant activity of T. creticum extracts were higher than T. polium ones. Phenols contents ranged from 16.388 to 105.672 mg GA E/ g dry weight extract. The extracts showed significant scavenging activity against DPPH, with IC50 values ranging between 0.195 and 0.710 mg/ml. The methanolic extracts show higher antioxidant activity from the two species. A good correlation between DPPH scavenging activities and contents of polyphenols was found. These results show that Syrian Teucrium species, especially T. creticum least Known among all, is a rich source of phenols and natural antioxidant compounds, that can be used as a natural food preservative.

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Phytochemical Composition and Antioxidant Activity of Various Grain Amaranth Cultivars

Notulae Botanicae Horti Agrobotanici Cluj-Napoca ◽

10.15835/nbha47411714 ◽

2019 ◽

Vol 47 (4) ◽

pp. 1153-1160 ◽

Cited By ~ 1

Author(s):

Andreea STĂNILĂ ◽

Bogdan CIOANCA ◽

Zorița DIACONEASA ◽

Sorin STĂNILĂ ◽

Nicușor SIMA ◽

...

Keyword(s):

Antioxidant Activity ◽

Protein Content ◽

Dry Weight ◽

Total Protein Content ◽

Digital Object Identifier ◽

Total Polyphenols ◽

Grain Amaranth ◽

Methanolic Extracts ◽

Mean Differences ◽

Red Dye

This study quantified differences in methanolic extracts composition among four grain amaranth cultivars (e.g. ‘Hopy Red Dye’, ‘Amont’, ‘Plenitude’, and ‘Golden Giant’) farmed under three planting conditions: no irrigation/no fertilization (NN), no irrigation/fertilization (NF), irrigation/no fertilization (IN). The study main outcomes were total flavonoids, polyphenols, antioxidant activity, and protein content. Antioxidant activity was assessed using two Single Electron Transfer (SET) based assays: the 2,2'-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) radical cation decolorization assay (ABTS) and cupric reducing antioxidant capacity (CUPRAC). The total protein content was assessed by Gornall spectrophotometric method, the total flavonoid content (TFC) was determined using a colorimetric technique, while total polyphenols content (TPC) was assessed using the Folin-Ciocalteu method. Mean differences in outcomes were calculated using ANOVA and Dunnet’s test for multiple comparisons. The findings revealed that TPC ranged from 5 to 18 mg gallic acid equivalents (GAE)/100 g dry weight (DW), being highest in ‘Plenitude’ under NF conditions. The highest TFC (7.5 mg quercetin equivalent (QE)/100 g DW) and the highest protein content (37.25%) were revealed for the ‘Hopi Red Dye’ cultivar under the NF planting conditions. Amaranth seeds represent a potential rich source of polyphenols and protein gluten-free compounds, with the ‘Hopi Red Dye’ representing the richest cultivar in such compounds. Fertilized and non-irrigated soil provided the optimal planting conditions across all amaranth cultivars. ********* In press - Online First. Article has been peer reviewed, accepted for publication and published online without pagination. It will receive pagination when the issue will be ready for publishing as a complete number (Volume 47, Issue 4, 2019). The article is searchable and citable by Digital Object Identifier (DOI). DOI link will become active after the article will be included in the complete issue. *********

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Quality Performances of Sweet Pepper under Farming Management

Notulae Botanicae Horti Agrobotanici Cluj-Napoca ◽

10.15835/nbha47111351 ◽

2018 ◽

Vol 47 (2) ◽

pp. 458-464 ◽

Cited By ~ 9

Author(s):

Gianluca CARUSO ◽

Vasile V. STOLERU ◽

Neculai C. MUNTEANU ◽

Vincenzo Michele SELLITTO ◽

Gabriel Ciprian TELIBAN ◽

...

Keyword(s):

Antioxidant Activity ◽

Ascorbic Acid ◽

Environmental Impact ◽

Total Yield ◽

Farming Systems ◽

Sweet Pepper ◽

Farming Practices ◽

Total Polyphenols ◽

Conventional Management ◽

Production Research

Conventional management of sweet pepper is based on farming practices characterized by the use of chemicals with harmful environmental impact. In order to investigate innovative production, research was carried out in order to assess the effects of two pepper cultivars (‘Brillant’ and ‘Yolo Wonder’) in combination with four farming systems (Conventional control-C; Conventional with microorganism-enriched fertilization-CMF; Organic control-O; Organic with microorganism-enriched fertilization-OMF) on plant physiological parameters, yield and fruit quality. Conventionally grown plants showed higher values of assimilatory pigments and of photosynthetic rate compared to the Organically ones. The CMF resulted in the highest early and total yield, followed by the OMF, due to higher fruit number. Higher values of carotenoids, ascorbic acid and α-tocopherol were recorded in ‘Yolo Wonder’ red fruits compared to ‘Brillant’ yellow berries. The highest total polyphenols concentration was recorded under the CMF, whereas OMF resulted in the highest flavonoids concentration and antioxidant activity.

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Comparative analysis of nutrient composition and glycaemic indices of nine sweet potatoes (Ipomoea batatas) varieties

International Journal of Biological and Chemical Sciences ◽

10.4314/ijbcs.v15i4.9 ◽

2021 ◽

Vol 15 (4) ◽

pp. 1410-1420

Author(s):

Galahitiya Ralalage Nipuni Nayanathara Waidyarathna ◽

Sagarika Ekanayake ◽

Anoma Chandrasekara

Keyword(s):

Dietary Fiber ◽

Sweet Potato ◽

Crude Protein ◽

Ipomoea Batatas ◽

Dry Weight ◽

Nutritional Composition ◽

Nutrient Composition ◽

Weight Basis ◽

Sweet Potatoes ◽

Total Dietary Fiber

Sweet potatoes are one of the major tuberous roots consumed around the world. The objective of the present study was to determine the nutritional composition, glycaemic indices and glycaemic loads of selected Sri Lankan sweet potato varieties, in order to address the inadequacy of information and the controversial findings on glycaemic indices. Nutrient composition (moisture, ash, digestible carbohydrates, dietary fiber, crude protein and fat) of boiled sweet potatoes, GI and glycaemic loads (GL) of nine varieties were determined using standard methods. Digestible carbohydrate content ranged between 29-88% on dry weight. Ash, crude protein and crude fat contents of the varieties ranged between 3.1-5.0%, 3.0-5.9% and 2.6-5.3% on dry weight basis (DW) respectively. The total dietary fiber content was above 9.5% DW in the studied varieties. Moisture content of boiled sweet potato tubers were 72-81% on fresh weight basis and both the GIs (86-119) and GLs (>20) were high. However, the GL reduced to medium or low when considering an actual edible portion for all the varieties except for two varieties. Sweet potatoes are a good source of highly available carbohydrates which elicit high GIs.

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Assessment of antioxidant and antibacterial activities of crude extracts of verbena officinalis Linn root or Atuch (Amharic)

10.31221/osf.io/pzh3s ◽

2019 ◽

Cited By ~ 1

Author(s):

Chem Int

Keyword(s):

Antioxidant Activity ◽

Methanolic Extract ◽

Radical Scavenging Activity ◽

Radical Scavenging ◽

Dry Weight ◽

Antimicrobial Activities ◽

Total Flavonoid ◽

Root Extract ◽

Antioxidant Power ◽

Crude Extracts

Verbena officinalis Linn is a traditionally known medicinal plant which is used against a number of diseases including inflammatory conditions. In this study its antioxidant activity (reducing powers, 2, 2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activities), ferric reduction activity potential (FRAP), total flavonoid concentration and antimicrobial activities of 80%, 90%, 100% methanol and chloroform extracts of V. officinalis Linn root and 90% and100% methanol leaf extracts were determined. Its antioxidant activity increases with increase in amount of extract (10% to 40%v/v). Total flavonoid content (TFC) varied from 73.32±0.002 mgQE/100g of dry weight (90% methanol) to 42.39±0.032 mgQE/100g dry weight (chloroform), 2,2-diphenyl-1-picrylhydrazyl (DPPH), radical scavenging activity (%) was varied between 87.39% (90% methanol) to 45.57% (chloroform) while Ferric reducing antioxidant power was observed between 372.93±0.04 mgAAE/100 g extract (90% methanol) to 129.41±0.026 mgAAE/100 g chloroform in the root extract. The methanolic extract of the leaf showed less antioxidant activity than the methanolic extract of the root. Crude extracts of V. officinalis root showed various degree of antimicrobial activity towards drug resistance microbial pathogens. Growth inhibition tests against bacterial pathogens demonstrated concentration dependence. Moreover, gram positive bacteria were more susceptible to V. officinalis root extract when compared to gram negative bacteria. In general V. officinalis root and leave extracts possess strong antioxidant and antimicrobial activities.

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PHYTOCHEMICAL CONSTITUENTS, ANTIOXIDANT ACTIVITY AND ACUTE ORAL TOXICITY OF POMEGRANATE (PUNICA GRANATUM L.) FRUIT PEEL EXTRACT

Journal of Medicine and Pharmacy ◽

10.34071/jmp.2019.4.1 ◽

2019 ◽

pp. 7-14

Author(s):

Hai Trieu Ly ◽

Tuan Anh Vo ◽

Viet Hong Phong Nguyen ◽

Thi My Sa Pham ◽

Bich Thao Lam ◽

...

Keyword(s):

Antioxidant Activity ◽

Gallic Acid ◽

Radical Scavenging ◽

Dry Weight ◽

Punica Granatum ◽

Acute Oral Toxicity ◽

Oral Toxicity ◽

Fruit Peel ◽

Total Polyphenol ◽

Punica Granatum L

Background: The natural antioxidants have an important role in the prevention of many diseases. The aim of study is to investigate phytochemical components, antioxidant activity and acute oral toxicity of Pomegranate (Punica granatum L.) fruit peel (PFP) extract. Materials and methods: Phytochemicals of PFP were determined by qualitative chemical tests, thin layer chromatography, total polyphenol and flavonoid contents. The PFP extract was evaluated for antioxidant activity by DPPH assay and MDA assay. In vivo acute oral toxicity test was conducted using Karber-Behrens method to determine LD50. Results: Results illustrated that PFP mainly contains flavonoids, alkaloids, tannins, triterpenes, saponins, and coumarins. PFP extract exhibited the total polyphenol and flavonoid contents with 189.97 mg gallic acid equivalent/g dry weight and 9.42 mg quercetin equivalent/g dry weight, respectively. The DPPH free radical scavenging and anti-lipid peroxidation activities of PFP extract were expressed with IC50 value of 4.80 μg/mL and 0.38 μg/ mL, sequentially. Simultaneously, the Dmax (the maximum dose administered to mice that no toxicity was observed) of PFP extract was determined to be 21.28 g/kg, equivalent to 35.64 g dried herb. Conclusion: The PFP extract is relatively safe and revealed high antioxidant activity. Key words: Punica granatum L.; polyphenols; flavonoids; gallic acid; quercetin; antioxidant activity; acute oral toxicity

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Antioxidant activity of cookiessupplemented with sugarbeet dietary fiber

Sugar Industry ◽

10.36961/si11177 ◽

2011 ◽

pp. 151-157 ◽

Cited By ~ 2

Author(s):

Marijana B. Saka ◽

Julianna F. Gyura ◽

Aleksandra Mišan ◽

Zita I. Šereš ◽

Biljana S. Pajin ◽

...

Keyword(s):

Antioxidant Activity ◽

Shelf Life ◽

Dietary Fiber ◽

Wheat Flour ◽

Room Temperature ◽

Antioxidant Activities ◽

Radical Scavenging Activity ◽

Antioxidant Properties ◽

Radical Scavenging ◽

Functional Characteristics

The antioxidant activity of cookies prepared by the addition of sugarbeet dietary fibers was investigated in order to estimate their influence on functional characteristics and shelf-life of cookies. Treated fiber (TF) was obtained from sugarbeet by extraction with sulfurous acid (75 °C at pH = 5.7during 60 min) and treatment with hydrogen peroxide (20 g/LH2O2 at pH = 11 during 24 h). The fiber obtained was dried (80 °C), ground and sieved. TF was investigated in comparison with commercially available Fibrex®. The cookies were prepared by the addition of 0, 7, 9 and 11% of sugarbeet dietary fiber as a substitute for wheat flour in the formulation of cookies. The antioxidant properties of cookies were tested every 7 days using a DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activity test during 6 weeks of storage at room temperature (23 ± 1 ºC). The obtained results indicated that substitution of wheat flour with Fibrex® in the formulation of cookies upgraded the antioxidant activity, i.e. the functional characteristics of Fibrex®-enriched cookies and could prolong their shelf-life. In contrast, TF did not increase the antioxidant activity of TF-enriched cookies. The better antioxidant activities of Fibrex®-enriched cookies could be attributed to the presence of ferulic acid.

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Contribution of Major Polyphenols to the Antioxidant Profile and Cytotoxic Activity of Olive Leaves

Anti-Cancer Agents in Medicinal Chemistry ◽

10.2174/1871520619666190416101622 ◽

2019 ◽

Vol 19 (13) ◽

pp. 1651-1657

Author(s):

Zouhaier Bouallagui ◽

Asma Mahmoudi ◽

Amina Maalej ◽

Fatma Hadrich ◽

Hiroko Isoda ◽

...

Keyword(s):

Antioxidant Activity ◽

Hepg2 Cells ◽

Cytotoxic Activities ◽

Phenolic Composition ◽

Olive Leaves ◽

Total Polyphenols ◽

Cytotoxic Effects ◽

Antioxidant Profile ◽

Phytochemical Profile ◽

Mcf 7

Aim: This study was designed to investigate the phytochemical profile and the cytotoxic activities of the eco-friendly extracts of olive leaves from Chemlali cultivar. Materials and Methods: The Phenolic composition of olive leaves extracts, the antioxidant activity and the cytotoxic effects against MCF-7 and HepG2 cells were determined. Results: Olive leaves extracts showed relevant total polyphenols contents. Oleuropein was the major detected phenolic compound reaching a concentration of 16.9 mg/ml. The antioxidant potential of the studied extracts varied from 23.7 to 46.5mM Trolox equivalents as revealed by DPPH and ABTS assays. Cytotoxicity experiments showed similar trends for both HepG2 and MCF-7 cells with the infusion extract being the most active. Conclusion: This study denotes that olive leaves may have great potential as endless bioresource of valuable bioactive compounds which may have a wide application.

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