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A study of pigments in some developmental stages of <i>Aurelia aurita</i> Lam OMA
Van den Branden, C.; Van den Sande, P.; Decleir, W..
Unfed polyps of <i>Aurelia aurita</i> are white. Fed with <i><i>Artemia</i> salina</i> nauplii they turn to pinkish because of the canthaxanthin present in the food. The deep brown-red colour of strobila and ephyra is due to melanin.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Developmental stages; Pigments; Polyps; Aurelia aurita.
Ano: 1980 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3702
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Allelochemicals from Alexandrium minutum induce rapid inhibition of metabolism and modify the membranes from Chaetoceros muelleri ArchiMer
Long, Marc; Tallec, Kevin; Soudant, Philippe; Le Grand, Fabienne; Donval, Anne; Lambert, Christophe; Sarthou, Geraldine; Jolley, Dianne F.; Hegaret, Helene.
Allelochemical interactions are likely to be a contributing factor explaining the success of large blooms of the harmful marine dinoflagellate Alexandrium, however, the physiological mechanisms of allelochemical interactions remain poorly described. Here we investigated the sub-lethal effects (on an hourly scale) of a filtrate containing allelochemicals from Alexandrium minutum on the physiology of the common diatom Chaetoceros muelleri. The filtrate induced deleterious effects to the diatom physiology within only 30 min of exposure. Esterase activity and photosynthesis were drastically inhibited, with up to 34% of the population being metabolically inactive and up to 30% reduction in photosystem II quantum yield when exposed to the filtrate. In addition,...
Tipo: Text Palavras-chave: Allelopathy; Alexandrium; Metabolism; Photoinhibition; Lipids; Pigments.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00460/57133/59748.pdf
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Antiproliferative Activity of Cyanophora paradoxa Pigments in Melanoma, Breast and Lung Cancer Cells ArchiMer
Baudelet, Paul-hubert; Gagez, Anne-laure; Berard, Jean-baptiste; Juin, Camille; Bridiau, Nicolas; Kaas, Raymond; Thiery, Valerie; Cadoret, Jean-paul; Picot, Laurent.
The glaucophyte Cyanophora paradoxa (Cp) was chemically investigated to identify pigments efficiently inhibiting malignant melanoma, mammary carcinoma and lung adenocarcinoma cells growth. Cp water and ethanol extracts significantly inhibited the growth of the three cancer cell lines in vitro, at 100 mu g.mL(-1). Flash chromatography of the Cp ethanol extract, devoid of c-phycocyanin and allophycocyanin, enabled the collection of eight fractions, four of which strongly inhibited cancer cells growth at 100 mu g.mL(-1). Particularly, two fractions inhibited more than 90% of the melanoma cells growth, one inducing apoptosis in the three cancer cells lines. The detailed analysis of Cp pigment composition resulted in the discrimination of 17 molecules, ten of...
Tipo: Text Palavras-chave: Pigments; Microalgae; Cyanophora paradoxa; Melanoma; Cancer; Apoptosis; Zeaxanthin; Cryptoxanthin.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00177/28818/27289.pdf
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Antiproliferative Activity of Violaxanthin Isolated from Bioguided Fractionation of Dunaliella tertiolecta Extracts ArchiMer
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
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Architecture and relevance of several strongly adhered biofilms over a polyester imide (PEI) surface BJM
Soncini-Júnior,Giancarlo; Franchetti,Sandra Mara Martins; Marconato,José Carlos.
A microscopical study was undertaken to analyze the eventual fungi adhesion over a polyester imide surface in enameled copper wires. Scanning electron microscopy allowed to observe in these adhered biofilms, a high amount of pigments, hyphae and its enzymatic arsenal probably acting in the surface of the polymer. Due to the highly aromatic nature of this polyester and the residual phenol derivates still present in the reticulated polymer, an antifungal activity could be expected, but no significant changes were noted in fungal growing and in the adhesion process. Additionally, the wires showed completely failure in all insulation properties. The studies aimed to understand and evaluate the great fungi potential that could be explored in biodeterioration...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fungi; Biofilms; Hyphae; Pigments; Adhesion; Scanning electron microscopy; Polymeric surface; Polyester-imide; Enameled copper wires.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000500036
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Carotenoid production in sugarcane juice and synthetic media supplemented with nutrients by Rhodotorula rubra l02 BJM
Bonadio,Mariana de Paula; Freita,Lidyane Aline de; Mutton,Márcia Justino Rossini.
ABSTRACT In order for the use of biological carotenoids to become feasible, it is necessary to have adequate low cost sources and improved methods of cultivation. The aim of this study was to evaluate the effect of supplementation with nitrogen, phosphorus, zinc, and magnesium, on the biomass and carotenoid volumetric production by yeast Rhodotorula rubra L02 using a complex medium (sugarcane juice) and synthetic media (sucrose and maltose) as substrates. The experimental design used for each substrate was randomized in blocks with 16 treatments and 3 repetitions. The treatments were compound for 15 different combinations of nutrients (N; Mg; Zn; P, N + Mg; N + Zn; N + P; Mg + Zn; Mg + P; Zn + P; N + P + Zn; N + P + Mg; N + Zn + Mg; P + Zn + Mg; N + Zn +...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Yeasts; Pigments; Macronutrients; Micronutrients; Killer activity.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400872
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Characteristics of the particulate matter during the Mai '92 experiment. Effect on ecophysiological functions on mussel and oyster populations. ArchiMer
Prou, Jean; Soletchnik, Patrick; Heral, Maurice; Geairon, Philippe; Razet, Daniel; Bougrier, Serge.
In order to complete the knowledge of seasonal variability of ecophysiological parameters, in situ experiment was conducted in May 1992 at the sampling site "Le Chapus". As in the previous experiments (May '91, October '91 and February '92), the race-way technique was used to study ecophysiological behavior of oyster and mussel populations submitted to natural variability.
Tipo: Text Palavras-chave: Pacific cupped oyster; Crassotrea gigas; Particulate matter; Pigments; Particle size distribution; Retention; Filtration; Mytilus edulis.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00100/21091/18715.pdf
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Characterization of world’s Foxtail Millet germplasm collections for morphological traits Open Agri
Reddy, V.G.,( V. Gopal Reddy ).
Palavras-chave: Germplasm; Millets; Pigments; Animal fibres; Gene banks; Plant habit; Grain; Inorganic acid salts; Tillage equipment; Sampling.
Ano: 2006 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3202
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Définition d’un indice composition pour le phytoplancton en Manche- Atlantique, à partir des données du micro-phytoplancton du REPHY et des réseaux régionaux, et des mesures complémentaires de la flore phytoplanctonique acquises avec des techniques novatrices. Action 3 – Livrable 1. Propositions pour un indice de composition du phytoplancton, basé sur les résultats des méthodes microscopie, pigments et diversité génétique. Rapport final, février 2016 ArchiMer
Hernandez Farinas, Tania; Brun, Melanie; Siano, Raffaele; Delmas, Daniel.
This deliverable is composed of two reports which propose indice of phytoplankton composition, based respectively on the results of pigment and genetic diversity methods, and the results of microscopy method. Proposals based on the results of pigment and genetic diversity methods. The present work is a continuation of several studies carried out in the past (Siano and Delmas, 2013, 2015) on investigating an indicator of phytoplankton diversity using two methods complementary to optical microscopy: the genetic diversity analyzed with metabarcoding (exhaustive analysis of the diversity and relative abundance of OTUs, i.e. groups of sequences identified by their genetic resemblance) and the pigmentary diversity (analysis of the diversity and abundance of...
Tipo: Text Palavras-chave: Metabarcoding; OTUs; Pigments; Picophytoplancton; Indice composition; Niche ecologique; Mamiellophyceae; Chlorophylle b; Rade de Brest; Bretagne sud; Panache de la Gironde; Denombrements du micro-phytoplancton; Abondance totale; Monotonicite; Linearite; Pressions; Facade Manche-Atlantique; Metabarcoding; OTUs; Pigments; Picophytoplankton; Composition indice; Ecological niche; Mamiellophyceae; Chlorophyll b; Brest Bay; Southern Britain; Gironde plume; Micro-phytoplankton counts; Total abundance; Monotonicity; Linearity; Pressure; Channel-Atlantic coast.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00363/47421/47426.pdf
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Deleterious effect of TRIS buffer on growth rates and pigment content of Gracilaria birdiae Plastino &amp; E.C. Oliveira (Gracilariales, Rhodophyta) Acta Botanica
Ursi,Suzana; Guimarães,Melina; Plastino,Estela Maria.
This work evaluated the effects of Tris (hydroxymethyl)-aminomethane (TRIS) buffer and its interaction with nutrient concentration on the development of Gracilaria birdie, a common species on the Brazilian coast that has been exploited for agar production. Responses to different conditions were assessed through growth rates and pigment content (chlorophyll a, phycoerythrin, phycocyanin and allophycocyanin). Provasoli's nutrient solution with and without TRIS addition was tested at concentrations of 12.5, 25 and 50%. The pH was also monitored. G. birdiae grew better in the absence of TRIS and at low nutrient concentrations, 12.5 and 25% (growth rates of 10.8-11.3%.day-1). Higher contents of phycoerythrin and chlorophyll a were observed without TRIS at 12.5...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Culture medium; TRIS (hydroxymethyl)-aminomethane; Gracilaria birdiae; Growth; Pigments.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062008000300024
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Distribución de clorofila "a" y feopigmentos en el Estrecho Bransfield, Bahía Chile y Paso Drake durante el verano de 1998 (Antártica) OceanDocs
Torres Ch., G..
Se estima la productividad primaria en concentración de clorofila "a" y feopigmentos, como indicativo de la calidad del primer nivel trófico-fitoplancton, registrados en el Estrecho Bransfield, Bahía Chile (Noreste de la Isla Greenwich) y en el Paso Drake, durante la VII Expedición Ecuatoriana a la Antártida a bordo del B/I ORION durante el verano austral de 1998. La biomasa fitoplanctónica superficial de clrofila "a" en el Estrecho Bransfield, registró las mayores concentraciones (0.7-0-8 mg/m3) hacia el noreste del estrecho, y las menores concentraciones de 0.2 mg/m3 se localizaron hacia el centro. A nivel subsuperficial de los 20 m se registraron las más altas concentraciones de toda la columna de agua (0-100 m), con una distribution latitudinal casi...
Tipo: Journal Contribution Palavras-chave: Chlorophylls; Pigments; Biomass; Biological production; Phytoplankton; Polar waters; Pigments; Biomass; Biological production; Phytoplankton.
Ano: 1998 URL: http://hdl.handle.net/1834/3846
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Distribución de clorofila "a" y feopigmentos en el Estrecho Bransfield, Bahía Chile y Paso Drake durante el verano de 1998 (Antártica) OceanDocs
Torres Ch., G..
Se estima la productividad primaria en concentración de clorofila "a" y feopigmentos, como indicativo de la calidad del primer nivel trófico-fitoplancton, registradas en el Estrecho Bransfield, Bahía Chile (Noreste de la Isla Greenwich) y en el Pacífico Drake, durante la VII Expedición Ecuatoriana a la Antártida a bordo del B/I ORION durante el verano austral de 1998. La biomasa fitoplanctónica superficial de clorofila "a" en el Estrecho Bransfield, registró las mayores concentraciones (0.7-08 mg/m3) hacia el noreste del estrecho, y las menores concentraciones de 0.2 mg/m3 se localizaron hacia el centro. A nivel subsuperficial de los 20 m se registraron las más altas concentraciones de toda la columna de agua (0-100 m), con una distribución latitudinal...
Tipo: Journal Contribution Palavras-chave: Chlorophylls; Biomass; Phytoplankton; Biological production; Pigments; Polar zones; Biomass; Phytoplankton; Biological production; Pigments; Chlorophylls; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_5875; Http://aims.fao.org/aos/agrovoc/c_1577.
Ano: 1998 URL: http://hdl.handle.net/1834/3840
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Draft genome sequence of Exiguobacterium aurantiacum strain PN47 isolate from saline ponds, known as “Salar del Huasco”, located in the Altiplano in the North of Chile BJM
Strahsburger,Erwin; Zapata,Felipe; Pedroso,Inti; Fuentes,Derie; Tapia,Paz; Ponce,Raul; Valdes,Jorge.
ABSTRACT In this report, we present a draft genome of 2,886,173 bp of an Exiguobacterium aurantiacum strain PN47 isolate from the sediment of a saline pond named “Salar del Huasco” in the Altiplano in the North of Chile. Strain PN47 encodes adaptive characteristics enabling survival in extreme environmental conditions of high heavy metal and salt concentrations and high alkalinity.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alkaline; Arsenic; Heavy metals; Pigments.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000100007
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Effect of cobalt on growth, pigments and the photosynthetic electron transport in Monoraphidium minutum and Nitzchia perminuta Braz. J. Plant Physiol.
El-Sheekh,M.M.; El-Naggar,A.H.; Osman,M.E.H.; El-Mazaly,E..
The unicellular green alga Monoraphidium minutum and the diatom Nitzschia perminuta were cultured under different concentrations of Co2+. Growth and pigment content were slightly increased at low concentrations and inhibited by high Co2+ concentrations. The results concerning the effect of different concentrations of Co2+ on photosynthetic O2 evolution showed a reduction in the amount of O2 evolved by each alga in response to increasing Co2+ concentrations. However, an increase in O2 evolution for both M. minutum and N. perminuta was observed at relatively low Co2+ concentrations. Photosynthetic electron transport in M. minutum was more sensitive to Co2+ toxicity than in N. perminuta. On the other hand, the effect of the heavy metal on respiration showed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cobalt; Diatoms; Green algae; Pigments; Photosynthesis.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000300005
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Enhanced biosynthesis of quercetin occurs as A photoprotective measure in Lycopersicon esculentum mill. under Acute UV-B exposure BABT
Shourie,Abhilasha; Tomar,Pushpa; Srivastava,Deepika; Chauhan,Rahul.
Lycopersicon esculentum respond to UV-B by enhanced synthesis of flavonoid quercetin, a strong antioxidant that helps the plants to well acclimatize to UV-B stress. Three weeks old plants of L. esculentum were subjected to acute UV-B irradiation for 20, 40 and 60 minutes daily until 28 days and analyzed for the morphological and biochemical changes. UV-B exposure for 40 and 60 minutes considerably affected the growth and biomass of L. esculentum. The leaves were deformed, developed chlorosis and abscised early as compared to the unexposed plants. Biomass declined by 35% and total chlorophyll decreased by 24.7% due to disintegration of chloroplasts. Enhancement was seen in the content of carotenoids, anthocyanins and total flavonoids by 15, 33.3 and 22.8%,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: UV-B; Lycopersicon esculentum; Quercetin; Biomass; Pigments; Anthocyanins.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000300002
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Extraction of bioactive compounds and free radical scavenging activity of purple basil (Ocimum basilicum L.) leaf extracts as affected by temperature and time Anais da ABC (AABC)
PEDRO,ALESSANDRA C.; MOREIRA,FERNANDA; GRANATO,DANIEL; ROSSO,NEIVA D..
In the current study, response surface methodology (RSM) was used to assess the effects of extraction time and temperature on the content of bioactive compounds and antioxidant activity of purple basil leaf (Ocimum basilicum L.) extracts. The stability of anthocyanins in relation to temperature, light and copigmentation was also studied. The highest anthocyanin content was 67.40 mg/100 g extracted at 30 °C and 60 min. The degradation of anthocyanins with varying temperatures and in the presence of light followed a first-order kinetics and the activation energy was 44.95 kJ/mol. All the extracts exposed to light showed similar half-lives. The extracts protected from light, in the presence of copigments, showed an increase in half-life from 152.67 h for the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anthocyanins; Extraction; Pigments; Response surface methodology.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000301055
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False positives for tannin sorghum in non-tannin sorghum using the bleach test Open Agri
Awika, J. McDonough, C.M..
Palavras-chave: Organic acids; Pigments; Sorghum; Phenols; Anthocyanins; Aromatic compounds; Sampling; Grain; Environmental degradation; Environmental factors.
Ano: 2005 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3240
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Genetic diversity of the harmful family Kareniaceae (Gymnodiniales, Dinophyceae) in France, with the description of Karlodinium gentienii sp. nov.: A new potentially toxic dinoflagellate ArchiMer
Nezan, Elisabeth; Siano, Raffaele; Boulben, Sylviane; Six, Christophe; Bilien, Gwenael; Cheze, Karine; Duval, Audrey; Le Panse, Sophie; Quere, Julien; Chomerat, Nicolas.
The family Kareniaceae is mostly known in France for recurrent blooms of Karenia mikimotoi in the Atlantic, English Channel, and Mediterranean Sea and for the unusual green discoloration in the saltwater lagoon of Diana (Corsica) caused by Karlodinium corsicum in April 1994. In terms of diversity, this taxonomic group was long overlooked owing to the difficult identification of these small unarmored dinoflagellates. In this study, thanks to the molecular characterization performed on single cells from field samples and cultures, twelve taxonomic units were assigned to the known genera Karenia, Karlodinium and Takayama, whereas one could not be affiliated to any described genus. The molecular phylogeny inferred from the D1–D2 region of the LSU rDNA showed...
Tipo: Text Palavras-chave: Genetic diversity; Haemolytic; Kareniaceae; Pigments; Single cell; Taxonomy.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00225/33611/32310.pdf
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Implications of the use of sorghum in broiler production Rev. Bras. Ciênc. Avic.
Garcia,RG; Mendes,AA; Almeida Paz,ICL; Komiyama,CM; Caldara,FR; Nääs,IA; Mariano,WS.
This study aimed at evaluating total or partial replacement of corn by sorghum in broiler diets and at estimating the effect of the pigment supplementation on broiler performance, carcass and cuts yield, and possible breast and leg pigmentation. We used 1680 one-d-old Ross® 308 broilers. Birds were sexed and distributed according to a completely randomized design (2 x 3 + 1). Treatments consisted of a control diet based on corn and diets with two levels corn replacement by sorghum (50 and 100%) and three pigments levels, with four replicates of 60 birds per treatment. There was no effect (p &gt; 0.05) of the dietary replacement of corn by sorghum on performance, carcass and parts yield, and no changes in breast and leg meat pH (p &gt;0.05). Meat...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Birds; Meat quality; Pigments; Replacement of corn.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000300013
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Influence of laboratory cultivation on species of Rhodophyta physiological evaluations and antifungal activity against phytopathogens Rev. Ciênc. Agron.
Machado,Levi Pompermayer; Matsumoto,Silvia Tamie; Cuzzuol,Geraldo Rogério Faustini; Oliveira Jr,Luiz Fernando Ganassali.
The present study examined changes that took place in the physiology of three species of Rhodophyta by analysing the concentration of pigments and non-structural carbohydrates, comparatively evaluating algae collected from nature and after 28 days of laboratory cultivation. Another objective of the study was to determine whether the species retain their antifungal potential after the period of laboratory cultivation, correlating the changes in physiology and those from bioactivity. After carrying out laboratory cultivation, the results indicated a trend, in the three species of macroalgae, towards a reduction in pigment concentrations, mainly in the phycobiliproteins. For the non-structural carbohydrates no response pattern of the macroalgae was observed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plant physiology; Macroalgae; Nonstructural carbohydrates; Pigments.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000100007
Registros recuperados: 48
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