Consulta: subjectFacets:"Carotenoid"
Registros recuperados: 15
Data/hora: 02/06/2024 07:21:15

A simple and fast sampling method for assessing chemical and nutritional characteristics of pumpkins
Provedor de dados: 75
Autores: Cardoso,Bruno Trindade; Ramos,Semíramis Rabelo Ramalho; lves,Ricardo Elesbão A; Ledo,Carlos Alberto da Silva; Santos,Antonina dos; Santos,Hister Maria Matias dos.
ABSTRACT In the chemical and nutritional analyses of pumpkin, the size of bulk sample recommended by the method of reference, makes the process time consuming and difficult to execute. The purpose of the present study was to evaluate different sampling methods to indicate the most suitable one to replace reference method to determine the levels of total carotenoids, total soluble solids, and moisture in pumpkin. A completely randomized design was used with four treatments and 18 replications. The proposed methods consisted basically in changing the way of taking bulk samples from the fruits: cylinders method, quartile method, and the slice method. Samples obtained by proposed methods were analyzed for moisture content, total carotenoids and total soluble...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucurbita moschata; Food analysis; Carotenoid; Sampling procedure; Quartering.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000300261

Antiproliferative Activity of Violaxanthin Isolated from Bioguided Fractionation of Dunaliella tertiolecta Extracts
Provedor de dados: 5
Autores: Pasquet, Virginie; Morisset, Perrine; Ihammouine, Said; Chepied, Amandine; Aumailley, Lucie; Berard, Jean-baptiste; Serive, Benoit; Kaas, Raymond; Lanneluc, Isabelle; Thiery, Valerie; Lafferriere, Mathieu; Piot, Jean-marie; Patrice, Thierry; Cadoret, Jean-paul; Picot, Laurent.
Dunaliella tertiolecta (DT) was chemically investigated to isolate molecules inhibiting cancer cell proliferation and inducing apoptosis in vitro. The potency to inhibit cell growth was used for the bio-guided fractionation and isolation of active compounds using chromatographic techniques. The DT dichloromethane extract exhibited a strong anti-proliferative activity on MCF-7 and LNCaP cells, and was further fractionated and sub-fractionated by RP-HPLC. High resolution mass spectrometry and spectrophotometric analysis unequivocally identified violaxanthin as the most antiproliferative molecule present in DT DCM extract. Violaxanthin purified from DT induced MCF-7 dose- dependent growth inhibition in continuous and discontinuous treatments, at...
Tipo: Text
Palavras-chave: Pigments; Microalgae; Dunaliella; Violaxanthin; Carotenoid; Cancer; Apoptosis.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00040/15142/12575.pdf

Impact of Light Intensity on Antioxidant Activity of Tropical Microalgae
Provedor de dados: 5
Autores: Coulombier, Noémie; Nicolau, Elodie; Le Déan, Loic; Antheaume, Cyril; Jauffrais, Thierry; Lebouvier, Nicolas.
Twelve microalgae species isolated in tropical lagoons of New Caledonia were screened as a new source of antioxidants. Microalgae were cultivated at two light intensities to investigate their influence on antioxidant capacity. To assess antioxidant property of microalgae extracts, four assays with different modes of action were used: 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2’-azinobis (3-éthylbenzothiazoline-6-sulphonique) (ABTS), oxygen radical absorbance capacity (ORAC), and thiobabituric acid reactive substances (TBARS). This screening was coupled to pigment analysis to link antioxidant activity and carotenoid content. The results showed that none of the microalgae studied can scavenge DPPH and ABTS radicals, but Chaetoceros sp., Nephroselmis sp., and...
Tipo: Text
Palavras-chave: Nephroselmis; Light intensity; In vitro antioxidant activity; Siphonaxanthin; Carotenoid; Bioactive compounds.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00609/72152/70900.pdf

Relation between lipid and fatty acid composition of eggs and larval survival in white pacific shrimp (Penaeus vannamei, Boone, 1931)
Provedor de dados: 5
Autores: Palacios, Elena; Rehault, Jean Pierre; Heras, Horacio; Marty, Yannick; Moal, Jeanne; Samain, Jean-francois.
In this study, lipid classes and fatty acid composition were determined in eggs of P. vannamei as a function of survival to zoea III stage. Spawns were reared individually to zoea III and grouped, according to their final survival to this larval stage, into spawns of high and low survival. Eggs of individual spawns were analyzed for lipid and fatty acid composition of neutral and polar lipids and the results were then grouped according to survival to zoea III. The lipids within each group (high and low survival to zoea III) were pooled for the separation of phospholipids and the analysis of their fatty acid composition. Higher levels of triglycerides, carotenoids, and linoleic (18: 2n-6) acid in eggs were associated with improved survival to zoea III....
Tipo: Text
Palavras-chave: Triglycerides; Phospholipid; Larval quality; Larval culture; Carotenoid.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/2002/publication-786.pdf

UPLC-MSE Profiling of Phytoplankton Metabolites: Application to the Identification of Pigments and Structural Analysis of Metabolites in Porphyridium purpureum
Provedor de dados: 5
Autores: Juin, Camille; Bonnet, Antoine; Nicolau, Elodie; Berard, Jean-baptiste; Devillers, Romain; Thiery, Valerie; Cadoret, Jean-paul; Picot, Laurent.
A fast and high-resolution UPLC-MSE analysis was used to identify phytoplankton pigments in an ethanol extract of Porphyridium purpureum (Pp) devoid of phycobiliproteins. In a first step, 22 standard pigments were analyzed by UPLC-MSE to build a database including retention time and accurate masses of parent and fragment ions. Using this database, seven pigments or derivatives previously reported in Pp were unequivocally identified: beta,beta-carotene, chlorophyll a, zeaxanthin, chlorophyllide a, pheophorbide a, pheophytin a, and cryptoxanthin. Minor amounts of Divinyl chlorophyll a, a chemotaxonomic pigment marker for prochlorophytes, were also unequivocally identified using the database. Additional analysis of ionization and fragmentation patterns...
Tipo: Text
Palavras-chave: Carotenoid; Chlorophyll; Dereplication; Divinyl chlorophyll a; Galactosyldiacylglycerol; Gracilamide; Mass spectrometry; MSE; Phytoplankton; Pigment; Porphyridium purpureum; UPLC.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00269/37994/36069.pdf

Zeaxanthin from Porphyridium purpureum induces apoptosis in human melanoma cells expressing the oncogenic BRAF V600E mutation and sensitizes them to the BRAF inhibitor vemurafenib
Provedor de dados: 5
Autores: Juin, Camille; De Oliveira Junior, Raimundo Gonsalves; Fleury, Audrey; Oudinet, Chloe; Pytowski, Lior; Berard, Jean-baptiste; Nicolau, Elodie; Thiery, Valerie; Lanneluc, Isabelle; Beaugeard, Laureen; Prunier, Gregoire; Guedes Da Silva Almeida, Jackson Roberto; Picot, Laurent.
Zeaxanthin, an abundant carotenoid present in fruits, vegetables and algae was reported to exert antiproliferative activity and induce apoptosis in human uveal melanoma cells. It also inhibited uveal melanoma tumor growth and cell migration in nude mice xenograft models. Here we report that zeaxanthin purified from the rhodophyte Porphyridium purpureum (Bory) K.M.Drew &amp; R.Ross, Porphyridiaceae, promotes apoptosis in the A2058 human melanoma cell line expressing the oncogenic BRAF V600E mutation. Zeaxanthin 40 μM (IC50) induced chromatin condensation, nuclear blebbing, hypodiploidy, accumulation of cells in sub-G1 phase, DNA internucleosomal fragmentation and activation of caspase-3. Western blot analysis revealed that zeaxanthin induced up-regulation...
Tipo: Text
Palavras-chave: Cancer; Carotenoid; Melanoma; Microalgae; Phytoplankton; Zeaxanthin.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00444/55595/57227.pdf

Concentration of photosynthetic pigments and chlorophyll fluorescence of mahogany and tonka bean under two light environments
Provedor de dados: 93
Autores: GONÇALVES,JOSÉ FRANCISCO DE CARVALHO; MARENCO,RICARDO ANTONIO; VIEIRA,GIL.
This study was carried out in a plantation of a degraded area in Central Amazon, Brazil, in order to assess environmental light effects on leaf pigment concentrations and chlorophyll a fluorescence in mahogany (Swietenia macrophylla King) and tonka bean (Dipteryx odorata Aubl. Willd). Three-year old saplings were grown in an open site (sun) with maximum radiation of approximately 2000 mumol m-2 s-1 and under the shade of a Ochroma pyramidale (Cav. ex Lam. Urb) canopy. A leaf area index of 2.46 was optically determined for the Ochroma foliage with 13% of full sunlight (maximum radiation about 260 mumol m-2 s-1). Carotenoid and chlorophyll concentrations were spectrophotometrically determined. Initial (Fo), maximum (Fm) and variable fluorescence (Fv) were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carotenoid; Dipteryx odorata; Swietenia macrophylla; Tropical species.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000200004

Fruits of Butia capitata (Mart.) Becc as good sources of β -carotene and provitamina
Provedor de dados: 94
Autores: Faria,Juliana Pereira; Siqueira,Egle M. A; Vieira,Roberto Fontes; Agostini-Costa,Tânia da Silveira.
Butia capitata is a palm tree, widely found in the Brazilian savanna. Their fruits are largely used by local communities to prepare juices, jellies and ice-creams. The main objective of this work was to determine the carotenoids profile of Butia capitata fruits and their provitamin A values. Total carotenoids content ranged from 11.1 to 43.9 μg.g-1; β-carotene was the predominant carotenoid (5.2-22.8 μg.g-1), followed by γ-carotene, phytoene, phytofluene, ζ-carotene, α-cryptoxanthin (or zeinoxanthin) and α-carotene. Provitamin A values varied from 50 to 200 RAE.100g-1. This result suggests that B. capitata pulp may be a good source of β-carotene and provitamin A.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazilian savanna; Palm tree; Carotenoid.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000500084

Extraction of Carotenoid Compounds from Saffron stamenUsing Ultrasound Waves
Provedor de dados: 111
Autores: einafshar, soodabeh; rohani, roxane; ahmadzadeh ghavidel, reihaneh.
Saffron flowers by products including sepals, petals and stamens have no application in Iran’s food industries; nevertheless stigmas contain a considerable amount of carotenoids withhigh antioxidant properties. In this study carotenoid compounds were extracted by an organic solvent (mixture of N-hexane, ethanol and acetone; 2:1:1 v: v) and ultrasound waves. Ultrasound waves were applied at a frequency of 24 kHz and amplitude of 20, 60 and 100% for5, 10 and 15 minute. All treatments were tested  in triplicates. The extraction efficiency, total carotenoid and phenolic compounds, free radical scavenging and reducing power of Fe III were analyzed. The results showed that ultrasound waves with amplitude of 100% imposed for 15 min caused the highest extraction...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant; Carotenoid; Extraction efficiency; Saffron stamen; Ultrasonic.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3396

Torularhodin and Torulene: Bioproduction, Properties and Prospective Applications in Food and Cosmetics - a Review
Provedor de dados: 52
Autores: Zoz,Liliana; Carvalho,Julio Cesar; Soccol,Vanete Thomaz; Casagrande,Thais Costa; Cardoso,Ligia.
Torularhodin and torulene are two widespread microbial carotenoids with relatively few studies, as compared to other nutraceutical carotenoids such as β-carotene, lycopene and astaxanthin. Several genera of microorganisms produce it in high concentration (up to 0.1% of the cell dry weight), probably as a protection against photooxidation and free radicals. These pigments, which differ by a terminal carboxylic group, have provitamin-A activity and, being red, have potential use as food and cosmetic color additives. Several factors affect the biosynthesis of these substances, including: the composition of culture media, light irradiation, which may enhance the carotenoid production up to 25% of the non-irradiated cultures, and temperature, which changes the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carotenoid; Antioxidant; Microorganism; Biopigment.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000200278

Growth and biopigment accumulation of cyanobacterium Spirulina platensis at different light intensities and temperature
Provedor de dados: 58
Autores: Kumar,Manoj; Kulshreshtha,Jyoti; Singh,Gajendra Pal.
In order to find out optimum culture condition for algal growth, the effect of light irradiance and temperature on growth rate, biomass composition and pigment production of Spirulina platensis were studied in axenic batch cultures. Growth kinetics of cultures showed a wide range of temperature tolerance from 20 ºC to 40 ºC. Maximum growth rate, cell production with maximum accumulation of chlorophyll and phycobilliproteins were found at temperature 35 ºC and 2,000 lux light intensity. But with further increase in temperature and light intensity, reduction in growth rate was observed. Carotenoid content was found maximum at 3,500 lux. Improvement in the carotenoid content with increase in light intensity is an adaptive mechanism of cyanobacterium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spirulina platensis; Growth kinetics; Chlorophyll a; Carotenoid; Phycobiliproteins.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000300034

Selection and characterization of carotenoid-producing yeasts from Campinas region, Brazil
Provedor de dados: 58
Autores: Maldonade,Iriani R.; Scamparini,Adilma R. P.; Rodriguez-Amaya,Délia B.
The objective of the present study was to select and identify yeasts from Brazil capable of producing carotenoids. Pigmented yeasts were isolated from soil, leaves, fruits, flowers and a processed product. The samples were incubated at 30ºC in Erlenmeyer flasks, containing YM broth. After 48 hours, they were inoculated in Petri dishes with YM agar, and incubated at 30ºC during 120 hours. The yeast colonies, which presented yellow to red coloration, were transferred to culture tubes containing YM agar, and incubated at 30ºC for 72 hours. Out of 242 samples, only five had yellow to red color at high intensity. These highly pigmented yeasts were re-isolated in Petri dishes with YM agar and then transferred to tubes with GPYM agar. Identification through...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pigmented yeasts; Identification; Rhodotorula; Carotenoid; Fermentation.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100014

Effect of cadmium on growth, micronutrient concentration, and δ-aminolevulinic acid dehydratase and acid phosphatase activities in plants of Pfaffia glomerata
Provedor de dados: 61
Autores: Skrebsky,Etiane C.; Tabaldi,Luciane A.; Pereira,Luciane B.; Rauber,Renata; Maldaner,Joseila; Cargnelutti,Denise; Gonçalves,Jamile F.; Castro,Gabriel Y.; Shetinger,Maria R.C.; Nicoloso,Fernando T.
Pfaffia glomerata (Spreng.) Pedersen plantlets were grown under different cadmium (Cd) concentrations (0, 20, 40, 60 and 80 μM) in a hydroponic system during 7 d. Plant growth, micronutrient, chlorophyll and carotenoid concentrations, as well as δ-aminolevulinic acid dehydratase (ALA-D; E.C.4.2.1.24) and acid phosphatase (AP; E.C.3.1.3.2) activities were then analysed. Cadmium concentration in both shoots and roots increased with increasing external Cd levels. Metal concentration was on average 12-fold greater in root than in shoot tissues. Root length was unaffected by Cd treatments. In contrast, dry weight of both shoot and roots increased significantly upon addition of 20 and 40 μM Cd. Moreover, shoot and total plant dry weight was only reduced in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazilian ginseng; Carotenoid; Chlorophyll; Heavy metal; Micronutrient; Phytoremediation.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000400004

Quality and stability of eggs from laying hens fed with organic minerals and lycopene
Provedor de dados: 65
Autores: Cruz,Flavia Kleszcz da; Garcia,Elis Regina de Moraes; Ferraz,André Luiz Julien; Souza,Karina Márcia Ribeiro de; Feliciano,William Britez; Rohod,Rosileide Vilalba.
ABSTRACT: This study aimed to evaluate the effect of using lycopene and organic minerals in diets for laying hens on the egg quality and stability of eggs stored for 30 days under different storage environments. An entirely randomized design was adopted in 2x3x3 factorial scheme (mineral sources x lycopene levels x storage periods) with six replicates of eight hens per experimental unit. The experimental diets were: feed containing inorganic minerals (IM) without added lycopene; IM with added lycopene (400mg kg-1); IM with added lycopene (800mg kg-1); organic minerals (OM) without added lycopene; OM with added lycopene (400mg kg-1); OM with added lycopene (800mg kg-1). After 112 days of feeding experimental diets, it was selected 60 eggs treatment-1, which...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant; Carotenoid; Chelate; Selenium; TBARS.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000100157

Nutrients and bioactive compounds of pulp, peel and seed from umbu fruit
Provedor de dados: 65
Autores: Ribeiro,Leilson de Oliveira; Viana,Eliseth de Souza; Godoy,Ronoel Luiz de Oliveira; Freitas,Sidinea Cordeiro de; Freitas,Suely Pereira; Matta,Virgínia Martins da.
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&lt;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...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spondias tuberosa Arruda Câmara; Phenolic; Carotenoid; ABTS assay.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400752