Consulta: subjectFacets:"Phenolics"
Registros recuperados: 49
Data/hora: 10/06/2024 16:30:25

Paja de trigo como sustrato en el crecimiento de plántulas de brócoli.
Provedor de dados: 32
Autores: Díaz Serrano, Fidel René.
Con el objetivo de utilizar la paja de trigo como sustrato en el crecimiento de plántulas de brócoli se hicieron varios experimentos. En el primero se evaluaron 3 sustratos de paja de trigo con extracción de fenólicos con agua común. Las plántulas de brócoli presentaron porcentajes de inhibición entre 54.92 y 57.40 % en la parte aérea y entre 38.31 y 44.78 % en raíces con respecto al testigo. En el segundo se identificaron por cromatografía de capa fina y se cuantificaron por cromatografía líquida de alta resolución los ácidos p-cumárico y ferúlico como probables compuestos inhibidores del crecimiento. Los porcentajes de recuperación de estos ácidos fueron muy bajos con respecto a la concentración de fenólicos solubles totales (CFST) cuantificados por...
Palavras-chave: Paja de trigo; Sustratos; Fenólicos; Plántulas; Brócoli; Wheat straw; Substrates; Phenolics; Seedlings; Broccoli; Doctorado; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/497

Paja de trigo como sustrato en el crecimiento de plántulas de brócoli.
Provedor de dados: 32
Autores: Díaz Serrano, Fidel René.
Con el objetivo de utilizar la paja de trigo como sustrato en el crecimiento de plántulas de brócoli se hicieron varios experimentos. En el primero se evaluaron 3 sustratos de paja de trigo con extracción de fenólicos con agua común. Las plántulas de brócoli presentaron porcentajes de inhibición entre 54.92 y 57.40 % en la parte aérea y entre 38.31 y 44.78 % en raíces con respecto al testigo. En el segundo se identificaron por cromatografía de capa fina y se cuantificaron por cromatografía líquida de alta resolución los ácidos p-cumárico y ferúlico como probables compuestos inhibidores del crecimiento. Los porcentajes de recuperación de estos ácidos fueron muy bajos con respecto a la concentración de fenólicos solubles totales (CFST) cuantificados por...
Palavras-chave: Paja de trigo; Sustratos; Fenólicos; Plántulas; Brócoli; Wheat straw; Substrates; Phenolics; Seedlings; Broccoli; Doctorado; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/497

Phenolic Profiling for Traceability of Vanilla x tahitensis
Provedor de dados: 5
Autores: Busconi, Matteo; Lucini, Luigi; Soffritti, Giovanna; Bernardi, Jamila; Bernardo, Letizia; Brunschwig, Christel; Lepers-andrzejewski, Sandra; Raharivelomanana, Phila; Fernandez, Jose A.
Vanilla is a flavoring recovered from the cured beans of the orchid genus Vanilla. Vanilla xtahitensis is traditionally cultivated on the islands of French Polynesia, where vanilla vines were first introduced during the nineteenth century and, since the 1960s, have been introduced to other Pacific countries such as Papua New Guinea (PNG), cultivated and sold as "Tahitian vanilla," although both sensory properties and aspect are different. From an economic point of view, it is important to ensure V. xtahitensis traceability and to guarantee that the marketed product is part of the future protected designation of the origin "Tahitian vanilla" (PDO), currently in progress in French Polynesia. The application of metabolomics, allowing the detection and...
Tipo: Text
Palavras-chave: Vanilla xtahitensis; Food metabolomics; Phenolics; Traceability; Authenticity.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00663/77530/79339.pdf

Improving the Antioxidant Properties of Calophyllum inophyllum Seed Oil from French Polynesia: Development and Biological Applications of Resinous Ethanol-Soluble Extracts
Provedor de dados: 5
Autores: Cassien, Mathieu; Mercier, Anne; Thétiot-laurent, Sophie; Culcasi, Marcel; Ricquebourg, Emilie; Asteian, Alice; Herbette, Gaëtan; Bianchini, Jean-pierre; Raharivelomanana, Phila; Pietri, Sylvia.
Tamanu oil from Calophyllum inophyllum L. has long been used in traditional medicine. Ethanol extraction was found the best strategy for recovering bioactive compounds from the resin part of Tamanu oil, yielding two neutral and acidic resins fractions with high phenolics, flavonoids and pyranocoumarins concentrations. A further cascade of LPLC/HPLC separations of neutral and acidic resin fractions allowed identifying fifteen metabolites, and among them, calanolide D and 12-oxocalanolide A (both in neutral fraction) were first identified from a natural source. All these extracts, subfractions and isolated metabolites demonstrated increased free radical scavenging, antioxidant, anti-inflammatory, antimicrobial and antimycobacterial activity compared to...
Tipo: Text
Palavras-chave: Calophyllum inophyllum L; Tamanu oil; Ethanol-soluble resin extracts; Lipophilic antioxidants; Phenolics; Pyranocoumarins; Antimicrobial; Anti-inflammatory; UV protection; EPR spin trapping.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00677/78918/81283.pdf

Algicidal effects of Zostera marina L. and Zostera noltii Hornem. extracts on the neuro-toxic bloom-forming dinoflagellate Alexandrium catenella
Provedor de dados: 5
Autores: Laabir, Mohamed; Grignon-dubois, Micheline; Masseret, Estelle; Rezzonico, Bernadette; Soteras, Giselle; Rouquette, Manuel; Rieuvilleneuve, Fabien; Cecchi, Philippe.
The inhibitory effects of crude extracts of Zostera marina L and Zostera noltii Hornemann on the growth of the toxic red tide dinoflagellate Alexandrium catenella were investigated through bio-assays. Methanolic and aqueous extracts were prepared from fresh and detrital leaves of Z. marina and Z. noltii collected in the Thau lagoon and Arcachon bay (France). All the extracts exhibited significant inhibition of A. catenella growth, whatever the species and without the need of continuous addition of extracts. The effective concentrations (EC50) varied in the range 0.036-0.199 g L-1 for Z. noltii and 0.036-0.239 g L-1 for Z. marina. Methanolic extracts prepared from fresh plant tissues were the most potent, with EC50 of 0.036-0.039 and 0.036-0.045 g L-1, for...
Tipo: Text
Palavras-chave: Growth inhibition; Allelopathy; Alexandrium catenella; Zostera marina; Zostera noltii; Phenolics.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00170/28095/26720.pdf

ANTIOXIDANT COMPOUNDS IN SKIN AND PULP OF FRUITS CHANGE AMONG GENOTYPES AND MATURITY STAGES IN HIGHBUSH BLUEBERRY (Vaccinium corymbosum L.) GROWN IN SOUTHERN CHILE
Provedor de dados: 126
Autores: Ribera,A.E; Reyes-Diaz,M; Alberdi,M; Zuñiga,G.E; Mora,M.L.
We evaluated the genotype and maturity effects on antioxidant activity and phenolic compounds of whole, skin and pulp fruits from three highbush blueberry cultivare (cv. Brigitta, cv. Bluegold and cv. Legacy) grown in southern Chile. Total antioxidant activity (TAA) in ripe fruits varied among the cultivare in the order Legacy &gt; Brigitta &gt; Bluegold. We found that TAA in unripe green and fully ripe fruits was high and similar between them, whereas the lowest levels were found in intermediate ripe fruits. The same trend was observed for fruit total phenolic content. This could be attributed to the higher concentrations of phenolic acids (mainly chlorogenic acid) and flavonols (mainly rutin) at immature fruit stages; whereas the high TAA in mature...
Tipo: Journal article
Palavras-chave: Vaccinium corymbosum; Antioxidant compounds; Maturity stages; Phenolics; Anthocyanins.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162010000200010

Chemical characteristics of grape juices from different cultivar and rootstock combinations
Provedor de dados: 86
Autores: Nassur,Rita de Cássia Mirela Resende; Pereira,Giuliano Elias; Alves,Juliana Alvarenga; Lima,Luiz Carlos de Oliveira.
The objective of this work was to evaluate the influence of different combinations of grape cultivars and rootstocks on chemical characteristics of grape juices. Six treatments were evaluated, consisting of combinations between the Isabel Precoce and BRS Cora grape cultivars and the 'IAC 766', 'IAC 313', and 'IAC 572' rootstocks. Approximately 10 L of juice were obtained per treatment. Analyses of color, total soluble solids content, pH, anthocyanins, total phenolics, total sugars, and quantification and identification of biogenic amines by HPLC were performed. Biogenic amines, such as putrescine, cadaverine, spermidine, and spermine, were found in all evaluated cultivars. By principal component analysis (PCA), treatments can be divided into two groups,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis labrusca; Anthocyanins; Biogenic amines; Phenolics; Principal component analysis.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000700540

Influence of wheat straw and rhizosphere on seed germination, early seedling growth and bio-chemical attributes of Trianthema portulacastrum
Provedor de dados: 87
Autores: Khaliq,A; Matloob,A; Aslam,F; Bismillah Khan,M.
Decomposing wheat (Triticum aestivum) straw and rhizosphere-infested soil were evaluated for their suppressive activity against horse purslane (Trianthema portulacastrum), a noxious summer weed in Pakistan. Two separate pot studies were carried out. Wheat straw was incorporated at 4, 6 and 8 g kg-1 soil five days before the sowing of horse purslane. Pots without straw incorporation were maintained as control. In a second study, soil was taken from 15 and 30 cm depths from a previously cropped wheat field immediately after its harvest and was used as growing medium. Soil from an intentionally uncropped area of the same field was used as control. Suppressive activity was measured in terms of germination dynamics, seedling growth, and biochemical attributes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathic rhizosphere; Chlorophyll; Phenolics; Antioxidants.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000300006

ALLELOPATHIC INFLUENCE OF AQUATIC WEEDS ON AGRO-ECOSYSTEMS: A REVIEW
Provedor de dados: 87
Autores: ABBAS,T.; NADEEM,M.A.; TANVEER,A.; SYED,S.; ZOHAIB,A.; FAROOQ,N.; SHEHZAD,M.A.
ABSTRACT Aquatic weeds are higher plants found in the aquatic ecosystem and in anaerobic rice fields, where they have no economic benefits. The continuance of aquatic weeds is more widespread than terrestrial weeds because in aquatic ecosystems there is very little fluctuation in the environmental conditions compared with terrestrial ecosystems. Scientists have been working to address the harmful allelopathic effects of aquatic weeds on the aquatic ecosystem, but limited information is available on the allelopathic influence of aquatic weeds on agro-ecosystems through the release of phytotoxic compounds. Phytotoxic chemicals released by different aquatic weeds into irrigation water and/or directly into rice ecosystems might have a significant inhibitory...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Aquatic ecosystem; Ecosystem interactions; Herbicides resistance management; Organic weed control; Phenolics; Weed invasion.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100301

Phytotoxic Activity of Parthenium Against Wheat and Canola Differ With Plant Parts and Bioassays Techniques
Provedor de dados: 87
Autores: KHALIQ,A.; ASLAM,F; MATLOOB,A; JAVAID,A; TANVEER,A; HUSSAIN,S.; IHSAN,M.Z.
Phytotoxic effects of invasive weed Parthenium hysterophorus were studied by using whole plant, leaf and root aqueous extracts at 0, 2.5, 5.0, 7.5 and 10% (w/v) concentrations against germination and early seedling growth of wheat and canola. Studies were carried out both in Petri plates with filter paper as substratum placed in controlled conditions and soil-filled plastic pots placed in open environments. Pronounced variation was noted for phytotoxic activity of different plant parts of parthenium, aqueous extract concentrations, test species, and bioassay techniques. Aqueous parthenium extracts either inhibited or delayed the germination and suppressed seedling growth of test species over control. For both test species, all the germination attributes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathic inhibition; Aqueous extracts; Bioassay techniques; Germination dynamics; Parthenium; Phenolics; Seedling growth.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100011

Toxic action of aqueous wheat straw extract on horse e purslane
Provedor de dados: 87
Autores: Khaliq,A.; Matloob,A.; Aslam,F.; Mushtaq,M.N.; Khan,M.B.
The toxic action of aqueous wheat (Triticum aestivum) straw extracts was investigated on germination, early seedling growth, some biochemical attributes and the antioxidant enzymes of horse purslane (Trianthemaportulacastrum). Aqueous extracts of wheat straw were prepared by soaking the wheat straw in distilled water in 1:10 w/v ratio and diluted to obtain the concentrations of 0, 25, 50, 75 and 100%. These were used as pre and post emergence in laboratory and screen house trials. Wheat aqueous extracts exhibited phytotoxicity to horse purslane by inhibiting and delaying its germination and suppressing seedling growth. Wheat phytotoxins in its aqueous extracts suppressed the chlorophyll content and soluble protein, and enhanced soluble phenolics and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytotoxins; Germination; Seedling growth; Phenolics; Antioxidants.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000200005

WHEAT HERBAGE AMENDMENTS ALTER EMERGENCE DYNAMICS, SEEDLING GROWTH OF LAMBSQUARTER AND SOIL PROPERTIES
Provedor de dados: 87
Autores: ASLAM,F.; KHALIQ,A.; TANVEER,A.; ZAHIR,Z.A.
ABSTRACT Crop allelopathy is a potential tool for weed management but allelopathic potential often varies among cultivars and developmental stages of crop. Bioassays were conducted to appraise the allelopathic potential of herbage (incorporated at 8 g kg-1 soil) of different hexaploid wheat (Triticum aestivum) cultivars (Millat-2011, AARI-2011, Lasani-2008 and Faisalabad-2008) collected at different crop growth stages [tillering (Z-30), anthesis (Z-60) and maturity (Z-90)] against lambsquarter (Chenopodium album). Mean emergence time taken by lambsquarter was prolonged over control by anthesis and maturity stage herbage of all wheat cultivars. Final emergence percentage was dropped by 3-17% in response to different growth stages of herbage collection....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop allelopathy; Emergence dynamics; Phenolics; Soil incorporation; Wheat growth stage.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400643

Leaf contents of nitrogen and phenolic compounds and their bearing with the herbivore damage to Tibouchina pulchra Cogn. (Melastomataceae), under the influence of air pollutants from industries of Cubatão, São Paulo
Provedor de dados: 88
Autores: FURLAN,CLÁUDIA MARIA; SALATINO,ANTONIO; DOMINGOS,MARISA.
The Atlantic Forest on the slopes of Serra do Mar around Cubatão (São Paulo, Brazil) has been affected by massive emissions of pollutants from the local growing industrial complex. The effects of air pollution on the amounts of leaf nitrogen, total soluble phenols and total tannins of Tibouchina pulchra Cogn., a common species in the area of Cubatão, were investigated, as well as the possible influence of the altered parameters on the leaf area damaged by herbivores. Fully expanded leaves were collected at two sites: the valley of Pilões river (VP), characterized by a vegetation virtually not affected by air pollution and taken as a reference; and valley of Mogi river (VM), close to the core region of the industrial complex, and severely affected by air...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Air pollution; Herbivory; Tibouchina pulchra Cogn.; Cubatão; Nitrogen; Phenolics.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000500014

Nutritional quality of the epicarp and mesocarp flours of baru fruits submitted to drying
Provedor de dados: 91
Autores: Silva,Daiana V.; Oliveira,Daniel E. C. de; Resende,Osvaldo; Silva,Marco A. P. da; Barcelos,Keyla R.
ABSTRACT Baru (Dipteryx alata Vogel) is a native tree of the Cerrado. The drying and milling process can be an alternative for the use and conservation of baru fruits. The objective of this study was to evaluate the effect of drying on the nutritional characteristics of the epicarp + mesocarp flour of baru fruits. The fruits were collected in the municipality of Santa Helena de Goiás, Goiás, sanitized and submitted to drying in an oven with air circulation at temperatures of 40, 60, 80 and 100 ºC until they had a constant mass. The analyses were performed in triplicate and the results evaluated by analysis of variance and Tukey test (p ≤ 0.05). Flours produced from dehydrated fruits had a reduction in lipid content (treatments 100 °C), energy value (60 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dipteryx alata Vogel; Antioxidant activity; Phenolics; Carotenoids.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000100065

Dual-stage sugar substitution in Tommy Atkins mango
Provedor de dados: 91
Autores: Medeiros,Rafael A. B. de; Barros,Zilmar M. P.; Carvalho,Carlos B. O. de; Coêlho,Antonio C. D.; Maciel,Maria I. S.; Azoubel,Patricia M.
ABSTRACT The dual-stage sugar substitution technique (D3S) was used to induce sugar replacement in mango. It involved two stages, in which high-calorie sugars were partially removed from the fruit samples in the first stage and, in the second one, low-calorie sugar was incorporated into the mango. Ultrasonic waves can be applied in one or both stages and their use was also evaluated in this study. Results showed that submitting samples to ultrasonic waves (25 kHz) in both stages and their immersion in Stevia-based solution (250 or 500 g kg-1) in the second stage for 10, 20 and 30 min of processing gave higher water loss during the process, while greater solids gain could be achieved by applying ultrasound only in the first stage. Samples were also...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carotenoids; Color; Mangifera indica; Phenolics; Preservation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000100060

DIETARY FIBRE CONTENT, PHENOLIC COMPOUNDS AND ANTIOXIDANT ACTIVITY IN SOURSOPS (Annona muricata L.)
Provedor de dados: 94
Autores: SIQUEIRA,AMANDA DE MORAIS OLIVEIRA; MOREIRA,ALDENISE CHAGAS CURVÊLO GONÇALVES; MELO,ENAYDE DE ALMEIDA; STAMFORD,THAYZA CHRISTINA MONTENEGRO; STAMFORD,TÂNIA LÚCIA MONTENEGRO.
ABSTRACT  Healthy eating is associated with the consumption of fruits, which are notable for their beneficial effects on human health. The aim of this study was to evaluate the proximate composition, composition of fibers and components with antioxidant activity in soursops varieties Crioula, Lisa and Morada of physiological maturity (PM) and mature (M). The protein, lipid and moisture contents did not differ between soursop varieties, but the ash contents were higher in the Morada-PM (0.56%±0.03) and the Morada-M (0.82%±0.10) varieties. The Crioula-M variety showed higher levels of total dietary fibre (5.76%±0.12). The Lisa-M variety showed higher levels of insoluble dietary fibre (4.46%±0.00). The Lisa-M variety also showed a higher level of phenolic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tropical fruit; Dietary fibre; Phenolics; Antioxidant activity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452015000401020

Effect of industrial processing for obtaining guava paste on the antioxidant compounds of guava (Psidium guajava l.) ‘Paluma’ cv.
Provedor de dados: 94
Autores: Del’Arco,Ana Paula Wolf Tasca; Sylos,Célia Maria de.
Abstract  Some foods constituents are subject to change during thermal and/or industrial processing. In the fruit processing industry, guava pulp is used during guava off season to obtain guava paste, produced with the addition of sugar and citric acid, subjected to various thermal processes. This study evaluated the effect of industrial processing to obtain guava paste on the content of ascorbic acid, total carotenoids, total phenolic and total flavonoid present in guava ‘Paluma’ cv. The results showed that there was an increase of antioxidants in guava pulp (15% ascorbic acid, 59% total carotenoids, 8% total phenolics and 54.5% total flavonoids), probably due to their increased concentration as a result of water loss during processing. There was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ascorbic Acid; Carotenoids; Phenolics; Antioxidant Activity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000200901

BIOACTIVE COMPOUNDS AND ANTIOXIDANT ACTIVITY OF PINEAPPLE FRUIT OF DIFFERENT CULTIVARS
Provedor de dados: 94
Autores: FERREIRA,ESTER ALICE; SIQUEIRA,HELOISA ELIAS; BOAS,EDUARDO VALERIO VILAS; HERMES,VANESSA STAHL; RIOS,ALESSANDRO DE OLIVEIRA.
ABSTRACT Pineapple is widely consumed and appreciated not only due to its taste and aroma, and also to its nutritional, functional and antioxidant properties, including its vitamin C and carotenoid contents. Brazil is one of the largest world’ pineapple producer, and Pérola and Smooth Cayenne cultivars are the most commonly grown and marketed, but their susceptibility to fusariosis can compromise cultivation. New cultivars resistant to this pathogen are available to meet the demands of pineapple producers and consumers. The aim of this study was to evaluate the content of bioactive compounds and antioxidant activity of pineapple fruits of Imperial, Victoria, IAC Fantástico and Gomo de Mel cultivars, as well as traditional Pérola and Smooth Cayenne...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ananas comosuse; Fusariosis; Vitamin C; Phenolics; Carotenoids.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000300801

Effects of fennel seed supplementation of ration on performance, egg quality, serum cholesterol, and total phenol content of egg yolk of laying quails
Provedor de dados: 96
Autores: Buğdaycı,Kadir Emre; Oğuz,Fatma Karakaş; Oğuz,Mustafa Numan; Kuter,Eren.
ABSTRACT The objective of this research was to evaluate the effects of fennel seed (Foeniculum vulgare Mill.) supplementation of ration on performance, egg quality, and serum cholesterol of laying quails during an eight-week period. For this purpose, 96 quail (Coturnix coturnix japonica) of 16 weeks of age were evenly separated into one control group and three treatment groups. Each group was divided into four replicates, each containing six quail. The fennel seeds (Foeniculum vulgare) were added to the diets of the first, second, and third treatment groups at levels of 0.3, 0.6, and 0.9%, respectively. No significant effect of dietary fennel seed supplementation was recorded on body weight, feed intake, egg production, and egg weight. Feed efficiency (kg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbal additive; Layer; Mediterranean seed; Phenolics.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100519

Identification and quantification of antioxidant compounds in cowpea
Provedor de dados: 124
Autores: Moreira-Araújo,Regilda Saraiva dos Reis; Sampaio,Geni Rodrigues; Soares,Rosana Aparecida Manólio; Silva,Cintia Pereira; Arêas,José Alfredo Gomes.
ABSTRACT Dietary antioxidant compounds have been widely studied because of their ability to delay or inhibit oxidative damage, which allows them to play an important role in the prevention of diseases and the promotion of health. The identification and characterization of such compounds are required before their use in humans. This study aimed to identify and quantify antioxidant compounds in the cowpea cultivar, BRS Tumucumaque, and the cowpea strain, Pingo de Ouro 1-2, in view of their potential use in the development of new products with potent antioxidant activity. Here, we report the antioxidant activity and the phenolic compound content of the aforementioned cowpeas. The antioxidant extracts were analyzed by HPLC in a Shimadzu LC-20AT chromatograph...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolics; Bioactive; Vigna unguiculata.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000500799

Chilling effect on soluble sugars, respiration rate, total phenolics, peroxidase activity and dormancy of onion bulbs
Provedor de dados: 63
Autores: Benkeblia,Noureddine; Shiomi,Norio.
Besides onions being one of the most cultivated and consumed vegetables, during storage onion bulbs are still affected by many physiological, biochemical and technological factors which can influence their quality. Respiration rate (RR O2), soluble sugars (SS), total phenolics (TP), and peroxidase (POD) activity were measured in inner bud tissues during a dormancy break of onion bulbs treated four weeks at 0ºC and stored in the dark at 20ºC. Control bulbs were stored simultaneously in the same condition. Breakage of dormancy was checked by the appearance of first green internal leaves by cutting longitudinally 30 bulbs. After eight weeks, RR O2 of sprouted onions was 52% higher than that of freshly harvested and dormant bulbs. One week after cooling SS...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: O2 consumption; Saccharides; Phenolics; Peroxidase; Sprouting.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000300007

Botanical source investigation and evaluation of the effect of seasonality on Brazilian propolis from Apis mellifera L.
Provedor de dados: 63
Autores: Tomazzoli,Maíra Maciel; Zeggio,Amélia Regina Somensi; Pai Neto,Remi Dal; Specht,Leandro; Costa,Christopher; Rocha,Miguel; Yunes,Rosendo Augusto; Maraschin,Marcelo.
ABSTRACT: Bees generally use different botanical sources of resins for the production of propolis. The elucidation of botanical sources of propolis and identification of the effects of seasonality on the chemical profile of propolis are recognized as two important aspects in the development of a high quality product. Thus, our objective was to elucidate the botanical source and identify the effect of the seasons on the chemical profile of propolis produced in southern Brazil. The chemical profile of the samples was analysed by spectrophotometric and chromatographic techniques and the results were coupled to multivariate analysis. Field observation of the foraging behaviour of Apis mellifera L. revealed its preference for the Baccharis dracunculifolia DC....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Baccharis dracunculifolia; Honeybees; Phenolics; Seasons.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000601301

Histochemical aspects of wheat resistance to leaf blast mediated by silicon
Provedor de dados: 63
Autores: Silva,Washington Luís da; Cruz,Maria Fernanda Antunes; Fortunato,Alessandro Antônio; Rodrigues,Fabrício Ávila.
Blast, caused by Pyricularia oryzae, has become a significant disease threat to wheat (Triticum aestivum L.) in Brazil. This study aimed to investigate at the histochemical level if silicon (Si) could enhance the production of flavonoids in the leaves of wheat plants in response to P. oryzae infection. Plants from the Aliança cultivar, which are susceptible to blast, were grown in hydroponic cultures containing 0 (-Si) or 2 mM of Si (+Si) and inoculated by spraying a conidial suspension of P. oryzae (1 × 105 conidia mL−1) on all adaxial leaf surfaces of plants at 60 days after emergence (growth stage 65). The fourth and fifth leaves of each plant were used to evaluate blast severity at 24, 36, 48, 72 and 96 h after inoculation (hai). At 96 hai, leaves were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pyricularia oryzae; Flavonoids; Histochemistry; Phenolics.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000400322

Characterization of Brazilian Syrah winter wines at bottling and after ageing
Provedor de dados: 63
Autores: Mota,Renata Vieira da; Peregrino,Isabela; Rivera,Stephanie Patricia Teran; Hassimotto,Neuza Mariko Aymoto; Souza,André Luiz de; Souza,Claudia Rita de.
ABSTRACT: Double pruning extended the harvest season of wine grape (Vitis vinifera L.) to dry winter, enabling production of high quality wines in the southeastern Brazil. Winter harvest allows grapes to fulfill not only technological maturation, but also phenolic ripeness. Winter wines from Syrah grapes harvested from eight vineyards in southeastern Brazil during three harvests were analyzed for their chemical and aromatic composition after bottling and after ageing for 20, 30, and 42 months in bottle. Winter wines have high content of total phenolic compounds, which remained almost constant through ageing, as well as color intensity. Malvidin 3-O-glucoside stood out among anthocyanins, remaining 5-10 % after 39 months of ageing. Moreover, malvidin...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Double-pruning; Composition; Color; Phenolics; Aroma.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000300903

Mycorrhizal inoculation affects the phytochemical content in strawberry fruits
Provedor de dados: 1
Autores: Cecatto, Ana Paula; Ruiz, Fátima Martínez; Calvete, Eunice Oliveira; Martínez, Jesús; Palencia, Pedro.
The aim of this research was to evaluate the effect of the inoculation date of arbuscular mycorrhizal fungi on the fruit quality and the content of phytochemicals in a strawberry soilless growing system. The experiment was performed in Huelva (Spain) and was conducted in a greenhouse on the La Rábida Campus of Huelva University under natural light and temperature from October 2013 to June 2014. Three short-day strawberry cultivars (‘Splendor’, ‘Sabrina’ and ‘Fortuna’) were grown in polyethylene bags filled with coconut fibres. Randomized block design, with 3 repetitions and factorial arrangement (3 cultivars x 3 treatments), was established. Each replicate consisted of one bag with 12 plants supporting structures at 40 cm height. The treatments were: T1 =...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.00-8 Fragaria x ananassa Duch.; Anthocyanin; Phenolics; Ascorbic acid Fitotecnia.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27932

Antioxidant activity and physicochemical analysis of passion fruit (Passiflora glandulosa Cav.) pulp native to Cariri region
Provedor de dados: 3
Autores: Lima-Neto, Abelardo Barbosa Moreira; Marques, Márcia Maria Mendes; Mendes, Francisca Noélia Pereira; Vieira, Ícaro Gusmão Pinto; Diniz, Derlange Belizário; Guedes, Maria Izabel Florindo.
The objective of this study was to determine the proximal composition, the physical and chemical characteristics and the in vitro antioxidant capacity (DPPH, ABTS and FRAP) of the pulp of the wild passion fruit (Passiflora glandulosa Cav.) from Cariri region, Ceara, Brazil. The results showed that the proximal composition and the caloric value of this passion fruit are similar to other species, but with a high ascorbic acid content. The fruit pulp showed low level of antioxidant activity and low level of polyphenolic compounds followed by three methodologies used. Due to high levels of titratable acidity (3.52) and total soluble solids (17.80° Brix), this fruit can be considered as a high value fruit for commerce. However, it is a species of passion fruit...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.03.00.00-0; 5.07.00.00-6 functional food; Agricultural; Dietary fiber; Phenolics; Natural antioxidants. Botânica.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/34045

Improving drought tolerance of quinoa plant by foliar treatment of trehalose
Provedor de dados: 111
Autores: Dawood, Mona Gergis.
Two field experiments were conducted during two successive seasons (2014/2015 and 2015/2016) at the Experimental Station of National Research Centre, Nubaria district, Beheira Governorate, Egypt, to study the effect of foliar treatment of quinoa plants with trehalose (Tre) (100µM and 500µM) on growth, photosynthetic pigments, seed yield quantity &amp; quality, in fever of nutritional and antioxidant compounds in the yielded quinoa seeds which subjected to water deficiency (skipping two irrigation times at 50 &amp; 60 days after sowing). Water deficiency caused marked decreases in quinoa plant growth parameters (shoot height, fresh and dry weights of shoot/plant) and photosynthetic pigments with marked increases in root growth parameters (root length, fresh...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Drought; Flavonoids; Oil; Phenolics; Protein; Quinoa; Trehalose.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4539

Mineral composition, nutritional properties, total phenolics and flavonoids compounds of the atemoya fruit (Annona squamosa L. x Annona cherimola Mill.) and evaluation using multivariate analysis techniques
Provedor de dados: 42
Autores: SANTOS,WALTER N.L. DOS; SAUTHIER,MARIA CELESTE S.; CAVALCANTE,DANNUZA D.; BENEVIDES,CLÍCIA M.J.; DIAS,FÁBIO S.; SANTOS,DANIELE C.M.B.
ABSTRACT The atemoya is a hybrid fruit obtained by crossing of cherimoya (Annona cherimola Mill.) with sweet sop (Annona squamosa L.). The information about chemical composition of atemoya is scarce. The mineral composition was evaluated employing Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES) and the centesimal composition and the physico-chemical parameters were assessed employing procedures described in the AOAC methods. The total phenolic compounds (TPC) and total flavonoids (TF) were determined using spectroanalytical methods. Considering the Reference Daily Intake (RDI), the concentrations of K, Cu and Vitamin C found in atemoya were the highest, representing about 32, 23 and 37% of the RDI, respectively. The total carbohydrates...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atemoya; Food composition; ICP OES; Flavonoids; Phenolics.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401243

In vitro antioxidant, DNA-damaged protection and antiproliferative activities of ethyl acetate and n-butanol extracts of Centaurea sphaerocephalaL.
Provedor de dados: 42
Autores: LAHNECHE,AMINA M.; BOUCHEHAM,RATIBA; OZEN,TEVFIK; ALTUN,MUHAMMED; BOUBEKRI,NASSIMA; DEMIRTAS,IBRAHIM; BICHA,SABRINA; BENTAMENE,ALI; BENAYACHE,FADILA; BENAYACHE,SAMIR; ZAMA,DJAMILA.
Abstract: This study aimed to evaluate the in vitro antiproliferative and inhibition of oxidative DNA-damage activities of n-butanol (n-BuOH) extract of Centaurea sphaerocephala. The in vitro antioxidant activity of the ethyl acetate (EtOAc) and the n-BuOH extracts of this plant were also assayed. To investigate the antioxidant potential, extracts were tested for their capacity to scavenge 1,1-diphenyl-2-picrylhydrazyl (DPPH·) and to inhibit lipid peroxidation using the TBARs method. The contents of total phenolics and flavonoids were measured. Additionally, antiproliferative activity and DNA-damage inhibition of the n-BuOH extract was determined using XCELLigence RTCA instrument and photolyzing 46966 plasmid, respectively. The results exhibited that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Centaurea sphaerocephala; Phenolics; Antioxidant; Lipid peroxidation; Antiproliferative; DNA-damaged inhibition.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500619

Evaluation of phenolic compounds and lipid-lowering effect of Morus nigra leaves extract
Provedor de dados: 42
Autores: ZENI,ANA LÚCIA B.; MOREIRA,TATIANNE D.; DALMAGRO,ANA PAULA; CAMARGO,ANDERSON; BINI,LARISSA A.; SIMIONATTO,EDÉSIO L.; SCHARF,DILAMARA R.
ABSTRACT Morus nigra L. (Moraceae) is a tree known as black mulberry and the leaves are used in folk medicine in the treatment of diabetes, high cholesterol and menopause symptoms. The aim of this study was to evaluate the M. nigra leaves phytochemical profile in different extractions and the hypolipidemic effect of the infusion comparing to the fenofibrate. Morus nigra infusion (MN) showed higher amounts of phenolics and flavonoids (83.85 mg/g and 79.96 µg/g, respectively), as well as antioxidant activity (83.85%) than decoction or hydromethanolic extracts. Although, decoction showed the best result for ascorbic acid (4.35 mg/100 g) than hydromethanolic or infusion (2.51 or 2.13 mg/100 g, respectively). The phenolic acids gallic, chlorogenic and caffeic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Morus nigra; Leaves; Phenolics; Triton WR-1339.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602805

Investigations of anticholinestrase and antioxidant potentials of methanolic extract, subsequent fractions, crude saponins and flavonoids isolated from Isodon rugosus
Provedor de dados: 48
Autores: Zeb,Anwar; Sadiq,Abdul; Ullah,Farhat; Ahmad,Sajjad; Ayaz,Muhammad.
BACKGROUND: Based on the ethnomedicinal uses and the effective outcomes of natural products in various diseases, this study was designed to evaluate Isodon rugosus as possible remedy in oxidative stress, alzheimer's and other neurodegenerative diseases. Acetylecholinestrase (AChE) and butyrylcholinesterase (BChE) inhibitory activities of crude methanolic extract (Ir.Cr), resultant fractions (n-hexane (Ir.Hex), chloroform (Ir.Cf), ethyl acetate (Ir.EtAc), aqueous (Ir.Aq)), flavonoids (Ir.Flv) and crude saponins (Ir.Sp) of I. rugosus were investigated using Ellman's spectrophotometric method. Antioxidant potential of I. rugosus was determined using DPPH, H2O2 and ABTS free radicals scavenging assays. Total phenolic and flavonoids contents of plant extracts...
Tipo: Journal article
Palavras-chave: Anticholinesterase; Antioxidant; Flavonoids; Phenolics; Saponins; Isodon rugosus.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100070

Antioxidant activity of extract from Polygonum aviculare L.
Provedor de dados: 48
Autores: HSU,CHIN-YUAN.
Free radicals induce numerous diseases by lipid peroxidation, protein peroxidation, and DNA damage. It has been reported that numerous plant extracts have antioxidant activities to scavenge free radicals. Whether Polygonum aviculare L. (Polygonaceae) has antioxidant activity is unknown. In this study, dried Polygonum aviculare L. was extracted by ethanol, and the extract was lyophilized. The antioxidant activities of extract powder were examined by free radical scavenging assays, superoxide radical scavenging assays, lipid peroxidation assays and hydroxyl radical-induced DNA strand scission assays. The results show that the IC50 value of Polygonum aviculare L. extract is 50 µg/ml in free radical scavenging assays, 0.8 µg/ml in superoxide radical scavenging...
Tipo: Journal article
Palavras-chave: Antioxidant activity; Free radical; Phenolics; Lipid peroxidation; DNA damage Polygonum aviculare L.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000200010

Evaluation of seasonal antioxidant activity and total phenolic compounds in stems and leaves of some almond (Prunus amygdalus L.) varieties
Provedor de dados: 48
Autores: Sivaci,Aysel; Duman,Sevcan.
BACKGROUND: This study aimed to determine the seasonal changes of total antioxidant activity and phenolic compounds in samples taken from leaves (April, July, October) and stems (April, July, October, January) of some almond (Prunus amygdalus L.) varieties (Nonpareil, Ferragnes and Texas). RESULTS: It was indicated that antioxidant activity and phenolic compounds in leaves and stems of Nonpareil, Ferragnes and Texas showed seasonal differences. Antioxidant activity IC50 of these varieties reached the highest value in April for leaves whereas in October for stems. The highest level of total phenolic compounds was in January for stems while in October for leaves. CONCLUSIONS: These results showed that total antioxidant activity and phenolics in leaves and...
Tipo: Journal article
Palavras-chave: Almond; Antioxidant activity; Phenolics; Prunus amygdalus; Seasonal changes.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100009

Antioxidant activity of 50% aqueous - ethanol extract from Acantholippia deserticola
Provedor de dados: 48
Autores: MORALES,GLAUCO; PAREDES,ADRIÁN; SIERRA,PATRICIA; LOYOLA,LUIS A.
The antioxidant properties oí Acantholippia deserticola, a herb used in traditional northern Chilean medicine was studied using free radical - generating systems. The 50% aqueous - ethanol extract oí Acantholippia deserticola protected against non-enzymatic lipid peroxidation in microsomal membranes of rat, induced by an Fe++ - ascorbate system and measured spectrophotometrically by the TBARS test, and had strong free radical scavenging capacities on stable ABTS and DPPH radicáis. The results shows that the IC50 valué of the 50% aqueous - ethanolic extract oí A.deserticola is 18 ± 0.5 &amp;#956;g/mL in DPPH radical - scavenging, 15 ± 0.8 &amp;#956;g/mL in lipid peroxidation , Total Antioxidant Activity (TAA) is 0.95 mM of Trolox per mg/mL of extract. The...
Tipo: Journal article
Palavras-chave: Acantholippia deserticola; Northern Chilean medicinal plant; Phenolics; Free radicáis scavenging; Microsomal lipid peroxidation.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000200004

Antioxidant activity of extract from Polygonum cuspidatum
Provedor de dados: 48
Autores: HSU,CHIN-YUAN; CHAN,YU-PEI; CHANG,JELI.
Numerous diseases are induced by free radicals via lipid peroxidation, protein peroxidation and DNA damage. It has been known that a variety of plant extracts have antioxidant activities to scavenge free radicals. Whether Polygonum cuspidatum Sieb. et Zuce has antioxidant activity is unknown. In this study, dried roots of Polygonum cuspidatum were extracted by ethanol and the extract was lyophilized. Free radical scavenging assays, superoxide radical scavenging assays, lipid peroxidation assays and hydroxyl radical-induced DNA strand scission assays were employed to study antioxidant activities. The results indicate that the IC50 value oí Polygonum cuspidatum extract is 110 µg/ml in free radical scavenging assays, 3.2 µg/ml in superoxide radical scavenging...
Tipo: Journal article
Palavras-chave: Antioxidant activity; Free radicals; Phenolics; Lipid peroxidation; DNA damage Polygonum cuspidatum.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000100002

Bioactive compounds and juice quality from selected grape cultivars
Provedor de dados: 53
Autores: Mota,Renata Vieira da; Glória,Maria Beatriz Abreu; Souza,Bianca Sarzi de; Peregrino,Isabela; Pimentel,Rodrigo Meireles de Azevedo; Dias,Frederico Alcântara Novelli; Souza,Laís Cristina de; Souza,André Luiz de; Regina,Murillo de Albuquerque.
ABSTRACT Grape juices have been valued due to their potential health benefits, which have demanded increased grape productivity and quality. Five grape cultivars grown in Brazil, Isabel Precoce, Carmem, Violeta, Concord and Bordo were evaluated in 2013 and 2014 seasons for bioactive components and also for juice processing quality traits. Production cycle was the longest for Carmem but lower and similar for Violeta, Isabel, Bordo and Concord. Isabel showed higher productivity (5.4 kg∙plant-1) but lowest soluble solids content (16.9 °Brix), anthocyanins (26.7 mg∙100 g-1) and total phenolics (110.7 mg∙100 g-1). The highest anthocyanins contents were observed in Violeta (189.9 mg∙100 g-1) and Bordo (133.8 mg∙100 g-1). These cultivars were also rich in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis labrusca; Fruit juices; Phenolics; Amines; Acceptance.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100062

Preharvest nitrogen application affects quality and antioxidant status of two tomato cultivars
Provedor de dados: 53
Autores: Frías-Moreno,Maria Noemi; Espino-Díaz,Miguel; Dávila-Aviña,Jorge; Gonzalez-Aguilar,Gustavo Adolfo; Ayala-Zavala,Jesús Fernando; Molina-Corral,Francisco Javier; Parra-Quezada,Rafael Angel; Orozco,Guadalupe Isela Olivas.
ABSTRACT Intensive horticultural crop production usually involves challenges from excessive application of fertilizer, mainly nitrogen (N). The effect of N fertilizer on the fruit quality and antioxidant status of two cherry tomato cultivars (Caballero and Victoria) under greenhouse conditions was performed. Nitrogen treatments were applied ranging from conditions comprising deficiency to toxicity (0, 15, 30, 45 and 60 mmol∙L-1). Yield, weight, diameter, fruit quality, phenols, flavonoids, lycopene, ascorbic acid and antioxidant capacity were measured at physiological maturity of the fresh tomato fruits. N treatment with 30 mmol∙L-1 produced the highest yield, fruit weight, firmness and diameter in both cultivars. However, increasing N from 30 to 60...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lycopersicon esculentum; Greenhouse; Ascorbic acid; Phenolics; Lycopene.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020000100134

Effects of some phenolic compounds on soybean seed germination and on seed-borne fungi
Provedor de dados: 52
Autores: Colpas,Flávia Tavares; Ono,Elizabeth Orika; Rodrigues,João Domingos; Passos,José Raimundo de Souza.
Studies were carried out on the effects of coumarin, ferulic acid and naringenin on soybean seed germination and on the growth of seed-borne fungi at concentrations of 50 and 100 mg.L-1. The compounds showed good inhibition of seed germination, especially at 50 mg.L-1, but little fungistatic activity. Possible mechanisms of action are discussed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Soybean; Phenolics; Coumarin; Ferulic acid; Naringenin.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200003

Can lychee reducing the adipose tissue mass in rats?
Provedor de dados: 52
Autores: Almeida,Martha Elisa Ferreira de; Ferreira,Juliana Thays; Augusto-Obara,Thalita Riquelme; Cruz,Richtier Gonçalves da; Arruda,Henrique Silvano; Santos,Virgínia Souza; Ramos,José Antônio de Souza Cruz; Botrel,Diego Alvarenga; Botrel,Regiane Victória de Barros Fernandes.
ABSTRACT Lychee fruit has been studied owing to the presence of several bioactive compounds that can contribute to weight loss in obese individuals. However, the anti-obese potential of the fruit has not been explored yet. The aim of this study was to investigate the effect of different parts of lychee in reducing the adipose tissue mass of cafeteria diet-fed rats. Phenolic compounds and scavenging capacities were quantified. The food intake, apparent digestibility, weight of the body and liver, body mass, Lee Index, and the mass of epididymal and visceral adipose tissues were evaluated. The results were estimated by Tukey’s Test at 5% probability. A higher amount of phenolic compounds and scavenging capacity were observed in the peel of lychee as compared...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolics; Cafeteria diet; Obesity; Litchi chinensis Sonn.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100413

Antioxidant properties of some filamentous green algae (Chaetomorpha Genus)
Provedor de dados: 52
Autores: Farasat,Massoumeh; Khavari-Nejad,Ramazan-Ali; Nabavi,Seyed Mohammad Bagher; Namjooyan,Foroogh.
The antioxidant activity and the contents of total phenolics and flavonoids were quantified in the methanolic extracts of four Chaetomorpha species including C. aerea, C. crassa, C. linum and C. brachygona. Eight samples of Chaetomorpha plants were collected from five locations along the northern coasts of the Persian Gulf in south of Iran from December 2010 until October 2011. Methanolic extracts of the seaweeds were assessed for their antioxidant activity using DPPH radical scavenging assay. C. linum showed highest antioxidant potential with a relatively low IC50 (1.484 ± 0.168 mg mL-1), the highest flavonoid content (18.177 ± 2.238 mg RE g-1 ) and a relatively high content of phenolics (2.895 ± 0.415 mg GAE g-1) in comparison with the other species. C....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant; Phenolics; Flavonoid; DPPH; Green algae; Chaetomorpha.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000600005

Induction of phenolics and defense-related enzymes in coconut (Cocos nucifera L.) roots treated with biocontrol agents
Provedor de dados: 61
Autores: Karthikeyan,M.; Radhika,K.; Mathiyazhagan,S.; Bhaskaran,R.; Samiyappan,R.; Velazhahan,R.
The effect of soil application of biocontrol agents (Pseudomonas fluorescens, Trichoderma viride and T. harzianum) in combination with chitin on induction of phenolics and defense enzymes in coconut roots infected with Ganoderma lucidum, the causal agent of Ganoderma disease, was investigated. Soil application of these biocontrol formulations in combination with chitin induced a significant increase in the activities of peroxidase (PO), polyphenol oxidase (PPO), phenylalanine ammonia-lyase (PAL), chitinase and beta-1,3-glucanase in the G. lucidum infected palms. Activities of both PAL and PO reached maximum levels within 3 d while the activity of PPO reached the maximum level 6 d after application of a mixture of P. fluorescens, T. viride and chitin....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chitin; Ganoderma disease; Induced systemic resistance; Pathogenesis-related proteins; Phenolics; Pseudomonas fluorescens; Trichoderma.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000300003

Alterations in biochemical components in mesta plants infected with yellow vein mosaic disease
Provedor de dados: 61
Autores: Chatterjee,Arpita; Ghosh,Subrata K.
Yellow vein mosaic disease of mesta (kenaf, Hibiscus cannabinus L.; and roselle, H. sabdariffa L.) is a new entrant to the disease scenario and it is associated with a novel monopartite Begomovirus. Changes in different biochemical parameters in diseased mesta plants were observed as compared to healthy ones. Isozyme pattern and assays of different enzymes, namely catalase, acid phosphatase, peroxidase, esterase, polyphenol oxidase and superoxide dismutase, revealed lower activities of catalase, acid phosphatase and peroxidase enzymes and enhanced activities of esterase, polyphenol oxidase and superoxide dismutase in diseased plants as compared to healthy ones. Due to the infection, chlorophyll content, phenolics and total soluble protein decreased whereas...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Begomovirus; Chlorophyll; Hibiscus; Isozyme pattern; Phenolics; Proline.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000400002

Foliar application of Burkholderia sp. strain TNAU-1 leads to activation of defense responses in chilli (Capsicum annuum L.)
Provedor de dados: 61
Autores: Madhavan,Srinivasan; Paranidharan,Vaikuntavasan; Velazhahan,Rethinasam.
Induction of phenolics, peroxidase (PO), polyphenol oxidase (PPO), chitinase and thaumatin-like proteins (TLP) in leaves of chilli (Capsicum annuum L.) in response to foliar application with a biocontrol agent Burkholderia sp. strain TNAU-1 was studied. Chilli plants, when sprayed with Burkholderia sp. strain TNAU-1 showed increase in phenolic content one day after application and the maximum accumulation was observed seven days after treatment. Three new peroxidase isozymes (PO-1, PO-2 and PO-3) were induced in chilli leaves upon treatment with Burkholderia sp. strain TNAU-1. The activity of all the peroxidases was at the maximum level three days after treatment and subsequently decreased. Protein extracts obtained from Burkholderia sp. strain TNAU-1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum annuum; Chitinase; Induced resistance; Peroxidase; Phenolics; Polyphenol oxidase; Thaumatin-like protein.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202011000400003

Allelopathic effects of aqueous and organic fractions of Euphorbia dracunculoides Lam. on germination and seedling growth of chickpea and wheat
Provedor de dados: 117
Autores: Tanveer,Asif; Kamran Jabbar,Muhammad; Kahliq,Abdul; Matloob,Amar; Nadeem Abbas,Rana; Mansoor Javaid,Muhammad.
Identification of weed species with allelopathic potential and characterization of their adverse effects against associated crops is required for better understanding of weed-crop interactions. Phytotoxic activity of Euphorbia dracunculoides Lam. on germination and seedling growth of chickpea (Cicer arietinum L.) and wheat (Triticum aestivum L.) was investigated under controlled conditions. Two separate studies were done with each of four organic solvent fractions (n-hexane, chloroform, ethylacetate, 1-butanol) and crude aqueous (1:10 and 1:20) whole plant fractions of E. dracunculoides using distilled water and 0.05% (v/v) dimethyl sulfoxide (DMSO) as control. Different aqueous and organic fractions of E. dracunculoides had a significant bearing on...
Tipo: Journal article
Palavras-chave: Allelopathy; Weeds; Germination attributes; Suppression; Phenolics.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000400006

Effect of Harvest Time and L-Cysteine as an Antioxidant on Flesh Browning of Fresh-Cut Cherimoya (Annona cherimola Mill.)
Provedor de dados: 117
Autores: Campos-Vargas,Reinaldo; Defilippi,Bruno G; Romero Q,Paula; Valdés G,Héctor; Robledo M,Paula; Prieto E,Humberto.
Browning development is the most important factor limiting the quality of fresh-cut cherimoya (Annona cherimola Mill.). However, there is little information available about its causes and methods of control. The effectiveness of L-cysteine (0.125, 0.25 and 0.5%) in fresh-cut cherimoya harvested on two occasions (October and November) and stored for 6 and 12 days at 0 °C was studied. In order to understand the biological basis of browning, polyphenol oxidase (PPO) enzyme activity and total phenolic content in fresh-cut pieces were measured. Quality measurements and sensory analysis indicated that 0.5% L-cysteine was somewhat effective in reducing browning development, without affecting other quality attributes. In terms of physiological parameters, PPO...
Tipo: Journal article
Palavras-chave: Antioxidants; Polyphenol oxidase; Phenolics; Sensorial evaluation.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000300001

Effect of methyl jasmonate treatments on the bioactive compounds and physicochemical quality of 'Fuji' apples
Provedor de dados: 118
Autores: Öztürk,Burhan; Altuntas,Ebubekir; Yildiz,Kenan; Ozkan,Yakup; Saracoglu,Onur.
Recently, plant growth regulators have been used for various purposes in apples. Methyl jasmonate (MeJA) has significant effects on the physiology, postharvest biology, processing, and chemical composition of apples. In the present study, the effects of MeJAMeJa treatments on the physicochemical quality and bioactive compounds (total antioxidant activity, total phenolics, and total anthocyanins) of 'Fuji' apples were investigated. The following doses of MeJa were used: 0 (control); 1; 120; 2,240; and 4,480 mg L-1. The highest geometric mean diameter, fruit mass, flesh firmness and skin thickness were obtained from the 2,240 mg L-1 MeJA treatment. Fruits harvested from control trees exhibited the highest total soluble solids content (TSSC) and pH, whereas...
Tipo: Journal article
Palavras-chave: Apple; Antioxidant; Color; Firmness; Methyl jasmonate; Phenolics.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100018

Extraction, characterization and microencapsulation of isoflavones from soybean molasses
Provedor de dados: 65
Autores: Batista,Vanessa Sabrina Fagundes; Nunes,Graciele Lorenzoni; Viegas,Gabriela Ilha; Lucas,Bruna Nichelle; Bochi,Vivian Caetano; Emanuelli,Tatiana; Barin,Juliano Smanioto; Menezes,Cristiano Ragagnin de; Rosa,Claudia Severo da.
ABSTRACT: This study aimed to extract isoflavones from soybean molasses with different solvents, furthermore, the selected extract, which showed overall desirable characteristics was selected to evaluate the potentials of different encapsulating agents. The encapsulating agents employed for the study included 18% Maltodextrin DE20 (T1), 18% Hi-maize (T2), and a mixture of equal proportions of 9% Maltodextrin DE20 and 9% of Hi-maize (T3). Solvents such as 80% ethanol and methanol, and grain alcohol in varying different concentrations of 50 and 80% were used for the studies. The best solvent for the extraction of phenolics and total isoflavones was 50% cereal alcohol, this extract also presented higher antioxidant activity. Evaluation of the encapsulating...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spray-drying; Antioxidant; Phenolics; Isoflavones.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000300751

Growth and physiological responses of sunflower plants exposed to ultraviolet-B radiation
Provedor de dados: 65
Autores: Cechin,Inês; Fumis,Terezinha de Fátima; Dokkedal,Anne Ligia.
The effects of UV-B radiation were studied in sunflower plants (Helianthus annuus L. cv. Catissol-01) growning in greenhouse under natural photoperiod conditions. The plants received approximately 0.60Wm-2 (control) or 4.0Wm-2 (+UV-B) of UV-B radiation for 7h d-1, centered around solar noon from 15 days after sowing. Compared to the control, plants exposed to high UV-B radiation for 12 or 21 days did not show any difference in shoot dry matter, specific leaf weight or UV-B absorbing compounds. Enhanced UV-B radiation caused a significant inhibition of photosynthesis (A) only in the first sampling and this was accompained by reduction in stomatal conductance (g s) and transpiration rate. The inhibition in A can not be fully explained by reduction in g s...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Helianthus annuus; Phenolics; Photosynthesis.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000100014

Antioxidant activity, anthocyanins and organic acids content of grape juices produced in Southwest of Minas Gerais, Brazil
Provedor de dados: 64
Autores: Vilas Boas,Ana Carolina; Henrique,Paôla de Castro; Lima,Luiz Carlos de Oliveira; Decarlos Neto,Antônio.
Phenolic compounds and anthocyanins content in grape juices varies in the cultivar, ripening and climate characteristics. The objective of this work was to characterize and evaluate antioxidant activity of grape juices produced in southwestern Minas Gerais. Grapes were harvested, sanitized and the juices from cultivars 'Bordô', 'Isabel Precoce', 'BRS Violeta' and 'BRS Rúbea' were produced in artisanal equipment by steam extraction and stored for 120 days. The following analyzes were performed during storage: color (L *), pH, soluble solids, titratable acidity, anthocyanins, antioxidant activity (DPPH and β-caroteno/linoleic acid), total phenolics, vitamin C and organic acids. Among the cultivars evaluated, the consumption of grape juice from cultivar 'BRS...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis labrusca; Phenolics; Vitamin C; Organic acids.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000500007