scholarly journals Comparative Studies on Different Citrus Cultivars: A Revaluation of Waste Mandarin Components

Antioxidants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 517 ◽  
Author(s):  
Giulia Costanzo ◽  
Maria Rosaria Iesce ◽  
Daniele Naviglio ◽  
Martina Ciaravolo ◽  
Ermenegilda Vitale ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Photosynthetic Pigment ◽  
Citrus Reticulata ◽  
Total Polyphenols ◽  
Total Carotenoids ◽  
Citrus Clementina ◽  
Total Chlorophyll Content ◽  
Photosynthetic Pigment Content ◽  
Seed Extracts

Peel, pulp and seed extracts of three mandarin varieties, namely Phlegraean mandarin (Citrus reticulata), Kumquat (Citrus japonica), and Clementine (Citrus clementina) were compared and characterised in terms of photosynthetic pigment content, total polyphenols amount, antioxidant activity and vitamin C to assess the amount of functional compounds for each cultivar. The highest polyphenols content was found in the Phlegraean mandarin, especially in peel and seeds, whereas Kumquat exhibited the highest polyphenols amount in the pulp. The antioxidant activity was higher in the peel of Phlegraean mandarin and clementine compared to Kumquat, which showed the highest value in the pulp. The antioxidant activity peaked in the seeds of Phlegraean mandarin. The vitamin C in the Phlegraean mandarin was the highest in all parts of the fruit, especially in the seeds. Total chlorophyll content was comparable in the peel of different cultivars, in the pulp the highest amount was found in clementine, whereas kumquat seeds showed the greatest values. As regards total carotenoids, peel and pulp of clementine exhibited higher values than the other two cultivars, whereas the kumquat seeds were the richest in carotenoids. Among the analysed cultivars Phlegraean mandarin may be considered the most promising as a source of polyphenols and antioxidants, compared to the clementine and Kumquat, especially for the functional molecules found in the seeds. Moreover, regardless of cultivars this study also highlights important properties in the parts of the fruit generally considered wastes.

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

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.

scholarly journals Nutrients and bioactive compounds of pulp, peel and seed from umbu fruit

2019 ◽  
Vol 49 (4) ◽  
Author(s):  
Leilson de Oliveira Ribeiro ◽  
Eliseth de Souza Viana ◽  
Ronoel Luiz de Oliveira Godoy ◽  
Sidinea Cordeiro de Freitas ◽  
Suely Pereira Freitas ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Bioactive Compounds ◽  
Nutritional Composition ◽  
Total Phenolic ◽  
Total Carotenoids ◽  
Fresh Pulp ◽  
Main Barrier ◽  
By Products

ABSTRACT: The objective of this research was to evaluate the nutritional composition and bioactive compounds of whole umbu fruit, including pulp, seed and peel, and also of a commercial umbu pulp. Samples of the fractions and of commercial pulp were analyzed for determination of minerals and proximate composition, total phenolic and antioxidant activity. Pulps and peel were also analyzed for vitamin C and carotenoids contents. Commercial pulp presented better nutritional composition than fresh pulp (P<0.05) and the peel presented higher phenolic content and antioxidant activity than seed. Peel also stood out by its vitamin C (79 mg.100 g-1) and total carotenoids (2,751 µg.100 g-1) contents, showing that, as the main barrier of the fruit for its protection, it is a fraction rich in bioactive compounds. The highest dietary fiber and iron contents were observed in umbu seed (P<0.05). Therefore, umbu by-products may be ingredients proper for development of food richer in nutrients and bioactive compounds.

scholarly journals The effect of preliminary processing and different methods of cooking on the iodine content and selected antioxidative properties of carrot (Daucus carota L.) biofortified with (potassium) iodine

2017 ◽  
Vol 29 (1) ◽  
pp. 11-24 ◽  
Author(s):  
Joanna Kapusta-Duch ◽  
Renata Bieżanowska-Kopeć ◽  
Sylwester Smoleń ◽  
Mirosław Pysz ◽  
Aneta Kopeć ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Iodine Content ◽  
Thermal Treatments ◽  
Total Polyphenols ◽  
Total Carotenoids ◽  
Production Chain ◽  
Daucus Carota L ◽  
Strongly Connected ◽  
Potassium Iodine ◽  
Physical And Chemical

AbstractCarrot is a vegetable that contains many nutrients and has strong antioxidant activity as well as pro-health potential. The level of bioactive compounds is strongly connected with the production chain. The thermal treatment of food products induces several biological, physical and chemical changes. In this study, changes in the levels of iodine, total carotenoids, total polyphenols as well as the antioxidant activity of unpeeled and peeled controls and carrots biofortified with (potassium) iodine (KJ) during cultivation due to the cooking and steaming process were investigated. The use of thermal processes resulted in a lower concentration of iodine in the roots of the control as well as in carrots biofortified with (potassium) iodine. In addition, peeling carrots caused higher losses of this trace element in the control and the biofortified carrots cooked or steamed for various times. In this study, a significant growth of the total carotenoids in peeled carrots biofortified with (potassium) iodine and of the total polyphenols in unpeeled carrots biofortified with (potassium) iodine under the influence of the cooking and steaming processes was observed compared with raw peeled and unpeeled biofortified carrots, respectively. Antioxidant activity significantly increased in the unpeeled and peeled carrots biofortified with (potassium) iodine under all thermal treatments in comparison with the raw unpeeled and peeled biofortified carrots.

scholarly journals Quality characteristics and antioxidative properties of broccoli cultivars (Brassica Oleracea L. var. italica Plenck)

2008 ◽  
Vol 56 (1) ◽  
pp. 91-96 ◽  
Author(s):  
Marek Gajewski ◽  
Paweł Szymczak ◽  
Marta Gorczyca ◽  
Maja Madejska
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Descriptive Analysis ◽  
Quality Traits ◽  
Analysis Method ◽  
Total Carotenoids ◽  
Quantitative Descriptive Analysis ◽  
Colour Parameters ◽  
Quantitative Descriptive

Quality traits of three broccoli cultivars, which were grown for autumn crop was determined: ‘Chevalier’ F1, ‘Milady’ F1 (cultivars of Dutch origin) and ‘Cezar’ F1 (of Polish origin). Immediately after harvest sensory quality of broccoli was evaluated, using the quantitative descriptive analysis method (QDA). In ‘brainstorming’ session there were chosen 14 attributes (profiles) concerning smell, texture, taste / flavour. Overall quality impression was also scored and hedonic test of broccoli liking was performed. Other quality traits determined were: antioxidant activity, total carotenoids content, vitamin C content, colour parameters in CIE L*a*b* system. These traits were determined separately for florets and stems of broccoli plants, both of which are usable parts of this vegetable. Results showed that investigated cultivars differed in respect of quality traits concerning sensory attributes, antioxidant activi­ty, carotenoids content, vitamin C content and colour parameters. Results showed also that florets of broccoli performed higher antioxidant activity than stems. Carotenoids content in broccoli cultivars was much higher in florets than in stems, but vitamin C content was on similar level in florets and stems of the plants. Florets and stems of all broccoli cultivars differed much in respect of colour parameters – lightness, greenness and yellowness.

scholarly journals Activité antioxydante de quelques plantes utilisées dans la région de Tiassalé (Côte d’Ivoire) dans le maintien de la santé de la peau

2018 ◽  
Vol 14 (30) ◽  
pp. 338
Author(s):  
Koffi Akessé Georges ◽  
Ahoua Angora Remi Constant ◽  
Ekou Lynda ◽  
Ekou Tchirioua ◽  
Kone Mamidou Witabouna
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Aqueous Extracts ◽  
Activité Antioxydante ◽  
Total Polyphenols ◽  
Cote D’Ivoire ◽  
Côte D'ivoire

Skin health is a concern for many people. This aim of this study is to evaluate in vitro the antioxidant activity of 10 plants used in cosmetopoeia for the maintenance of skin health. To achieve this objective, 30 extracts were tested using 2,2'-diphenyl-1-picrylhydrazyl radical (DPPH) and 2,2'-azino-bis (3-ethylbenzothiazoline-6) acid. -sulfonic) (ABTS + •) assays. The extracts studied were rich in total polyphenols, flavonoids, gallic tannins and alkaloids. For the DPPH reduction, 7 extracts including 5 methanolic and 2 aqueous extracts showed a percentage of inhibition similar to that of Vitamin C (95.79 ± 10.53%) used as a control. With ABTS, 11 extracts (5 methanol, 3 aqueous and 3 hexane) gave reduction percentages close to Trolox (95.97 ± 8.51%). These active plants could play a role in the maintaining of skin.

scholarly journals Proximate composition and antioxidant activity of Syzygium cumini fruit grown at different regions in Bangladesh

Food Research ◽  
2020 ◽  
Vol 4 (5) ◽  
pp. 1693-1699
Author(s):  
S. Ahmed ◽  
K.S. Ahmed ◽  
M.S. Hossain ◽  
M.S. Azam ◽  
M. Rahman ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Proximate Composition ◽  
Reducing Power ◽  
Ferrous Ion ◽  
Composition Analysis ◽  
Syzygium Cumini ◽  
Total Carotenoids ◽  
Chelating Ability ◽  
Seed Extracts

The risk of degenerative diseases decreases with the consumption of high antioxidant containing fruits. This study aimed to analyze the proximate composition and antioxidant activity of pulp and seed of Syzygium cumini. Proximate composition was determined by following the AOAC method. Minerals and heavy metals were analyzed using a flame photometer and an atomic absorption spectrometer. In-vitro antioxidant activity was evaluated by using phosphomolybdenum, ferrous ion chelating ability assay and reducing power assay methods. In proximate composition analysis pulp contained significantly (p<0.05) greater amount of minerals than seed but seed contained a higher amount of protein and lipid than pulp. In the bioactive compound analysis, seed extracts possessed significantly (p<0.05) greater amount of Chlorophyll A, Chlorophyll B and total carotenoids. Additionally, seed extracts exhibited significantly (p<0.05) more total antioxidant capacity, reducing power and ferrous ion chelating ability compared to pulp extracts. This study revealed that the seed of Syzygium cumini contains significantly (p<0.05) higher amount of minerals, bioactive compounds and showed better antioxidant property. Therefore, Syzygium cumini seed can be a potential source of natural antioxidant in medicine and food production.

scholarly journals Antioxidant Activity, Color, Carotenoids Composition, Minerals, Vitamin C and Sensory Quality of Organic and Conventional Mandarin Juice, cv. Orogrande

2011 ◽  
Vol 17 (3) ◽  
pp. 241-248 ◽  
Author(s):  
P. Navarro ◽  
A.J. Pérez-López ◽  
M.T. Mercader ◽  
A.A. Carbonell-Barrachina ◽  
J.A. Gabaldon
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Organic Farming ◽  
Sensory Quality ◽  
Good Source ◽  
Total Carotenoids ◽  
Trained Panel ◽  
Orange Color ◽  
Mandarin Juices

The effects of organic farming on antioxidant activity, CIE L*a*b* color, carotenoids composition, minerals contents, vitamin C and sensory quality of Orogrande mandarin juices were studied. Independent of the farming type, mandarin juices can be considered as good source of some important nutrients, such as potassium and antioxidant chemicals, for example, β-cryptoxanthin. Organic farming of mandarins resulted in juices with higher antioxidant activity, total carotenoids concentrations, minerals (Ca, K and Fe) contents, vitamin C content, more appealing and intense orange color and better sensory quality. For instance, organic Orogrande juice contained significantly (p < 0.001) higher total carotenoids content (22.7 ± 0.3 mg/L) than conventional juice (15.7 ± 0.4 mg/L); a similar pattern was observed for the antioxidant activity, with values being 0.076±0.004 and 0.053 ± 0.003 mM Trolox m/L in organic and convectional juices, respectively. A trained panel stated that organic Orogrande juices had higher intensities of orange color, fresh mandarin and floral aromas than conventional juices.

scholarly journals Development of SPAD value-based linear models for non-destructive estimation of photosynthetic pigments in wheat (Triticum aestivum L.)

2019 ◽  
Vol 79 (01) ◽  
Author(s):  
Pramod Kumar ◽  
R. K. Sharma
Keyword(s):  
Linear Models ◽  
Photosynthetic Pigment ◽  
Triticum Aestivum L ◽  
Pigment Content ◽  
Total Chlorophyll ◽  
Total Carotenoids ◽  
Chl A ◽  
Spad Value ◽  
Photosynthetic Pigment Content ◽  
Wheat Leaves

Chlorophyll content in leaf which can be measured and expressed as SPAD values, is a good indicator of plant health. The present study aimed to develop linear models for studying relationship between SPAD values and spectrophotometrically determined chlorophylls and carotenoid contents in leaves of 468 wheat genotypes. The SPAD values were taken in the flag leaves at heading stage. Chlorophyll a (Chl a), chlorophyll b (Chl b), total chlorophyll (total Chl) and total carotenoids (total Car) contents were assessed using dimethyl sulfoxide (DMSO) extraction method. To estimate photosynthetic pigment content in leaves, SPAD value-based linear models were developed and Chla (Chlb = 0.0690 x SPAD Value - 1.082), Chla (Chlb = 0.021 x SPAD Value 0.396), total Chl (Total chlorophyll = 0.090 x SPAD Value - 1.477) and total carotenoids (Total Carotenoids = 0.013 x SPAD Value 0.074) were estimated. The present study reports development of linear model for quantification of the photosynthetic pigment content in wheat leaves using chlorophyll meter.

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