Consulta: subjectFacets:"Pigments"
Registros recuperados: 50
Data/hora: 11/06/2024 07:09:07

Relaciones entre radiación solar, desarrollo y calidad de cactáceas ornamentales
Provedor de dados: 32
Autores: Sánchez Pérez, Anna Magali.
Las cactáceas tienen flores y características morfológicas atractivas que las hacen plantas  ornamentales muy apreciadas; se utilizan principalmente como ornato en exteriores pero  algunas también se pueden utilizar como plantas de interior; sin embargo, en interiores hay  bajos niveles de radiación fotosintéticamente activa (RFA), lo que influye en su crecimiento,  desarrollo y vida útil. En México hay poca investigación sobre el tema, por lo que el objetivo  de esta investigación fue analizar el efecto de diferentes niveles de RFA en el crecimiento,  periodo de floración y contenido de pigmentos (clorofila “a”, “b”, carotenoides y betalaínas)  en cuatro especies y analizar su capacidad de adaptación a bajos niveles de RFA. Las  especies fueron Rebutia...
Tipo: Tesis
Palavras-chave: Floración; Sombreo; Pigmentos; Copiapoa tenuissima; Echinopsis chamaecereus “aurea”; Rebutia heliosa; Rebutia muscula Flowering; Shading; Pigments; Copiapoa tenuíssima; Echinopsis chamaecereus aurea; Rebutia heliosa; Rebutia muscula.
Ano: 2012
URL: http://hdl.handle.net/10521/1056

Relaciones entre radiación solar, desarrollo y calidad de cactáceas ornamentales
Provedor de dados: 32
Autores: Sánchez Pérez, Anna Magali.
Las cactáceas tienen flores y características morfológicas atractivas que las hacen plantas  ornamentales muy apreciadas; se utilizan principalmente como ornato en exteriores pero  algunas también se pueden utilizar como plantas de interior; sin embargo, en interiores hay  bajos niveles de radiación fotosintéticamente activa (RFA), lo que influye en su crecimiento,  desarrollo y vida útil. En México hay poca investigación sobre el tema, por lo que el objetivo  de esta investigación fue analizar el efecto de diferentes niveles de RFA en el crecimiento,  periodo de floración y contenido de pigmentos (clorofila “a”, “b”, carotenoides y betalaínas)  en cuatro especies y analizar su capacidad de adaptación a bajos niveles de RFA. Las  especies fueron Rebutia...
Tipo: Tesis
Palavras-chave: Floración; Sombreo; Pigmentos; Copiapoa tenuissima; Echinopsis chamaecereus “aurea”; Rebutia heliosa; Rebutia muscula; Maestría; Fisiología Vegetal; Flowering; Shading; Pigments.
Ano: 2008
URL: http://hdl.handle.net/10521/1390

Salinity effects on protein content, lipid peroxidation, pigments, and proline in Paulownia imperialis (Siebold &amp;amp; Zuccarini) and Paulownia fortunei (Seemann &amp;amp; Hemsley) grown in vitro
Provedor de dados: 69
Autores: Ayala-Astorga,Gloria Irma; Alcaraz-Meléndez,Lilia.
We evaluated the effects of saline stress on soluble proteins, lipid peroxidation (TBAR), chlorophyll a, chlorophyll b, &amp;#946;-carotene, violaxanthin, and proline in Paulownia imperialis and Paulownia fortunei plants grown in vitro. When the propagated plants reached a determined size, they were transferred aseptically to WPM culture medium containing different sodium chloride concentrations (0, 20, 40, 60, 80, and 160 mM) and were sampled at 15 and 30 days. Proline content was determined at 30 days after transfer only. Protein concentration significantly decreased with the highest salt levels in P. imperialis compared to controls in which no sodium chloride was added. In both P. imperialis and P. fortunei, lipid peroxidation significantly increased at...
Tipo: Journal article
Palavras-chave: Paulownia fortunei; Paulownia imperialis; Pigments; Proline; Proteins; Salinity; TBARS; Tissue culture.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000500013

White mold detection in common beans through leaf reflectance spectroscopy
Provedor de dados: 70
Autores: Machado,Marley L.; Pinto,Francisco de A. C.; Paula Junior,Trazilbo J. de; Queiroz,Daniel M. de; Cerqueira,Ozires de A. T.
ABSTRACT This study aimed to identify wavelengths based on leaf reflectance (400-1050 nm) to estimate white mold severity in common beans at different seasons. Two experiments were carried out, one during fall and another in winter. Partial Least Squares (PLS) regression was used to establish a set of wavelengths that better estimates the disease severity at a specific date. Therefore, observations were previously divided in two sub-groups. The first one (calibration) was used for model building and the second subgroup for model testing. Error measurements and correlation between measured and predicted values of disease severity index were employed to provide the best wavelengths in both seasons. The average indexes of each experiment were of 5.8% and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sclerotinia sclerotiorum; PLS regression; Pigments; Spectrum; Absorption.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000601117

Пигментный комплекс рыхлых грунтов Севастопольской бухты (Чёрное море)
Provedor de dados: 13
Autores: Ревков, Н. К.; Бобкова, А. Н.; Неврова, Е. Л.; Копытов, Ю. П.
Distribution of pigment complex of chlorophylls a, b, c, pheopigments and carotenoids in bottom sediments of the Sevastopol bay and its relationship with abiotic parameters by multivariate statistic methods were analyzed.
Tipo: Book Section
Palavras-chave: Pigments; Benthos diatomaceous; Black sea.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1882

Деградация пигментов у Spirulina platensis (Nordst.) Geitl. в условиях голодания по фосфору
Provedor de dados: 13
Autores: Геворгиз, Р. Г.; Головня, Ю. Н.
В условиях глубокого лимитирования роста микроводоросли Spirulina platensis  мине-ральным фосфором на свету происходит полное разрушение всех видов пигментов. Разрушается также и биомасса, причем степень разрушения зависит от интенсивности света. Скорость разру-шения пигментов у клеток, голодающих по фосфору, значительно выше, чем у клеток, голодаю-щих по азоту. При внесении порции фосфатов пигменты и биомасса начинают восстанавливаться. Скорость восстановления определяется предысторией культуры. В темноте в течение восьми дней пигменты и биомасса оставались неизменными, в последующие дни наблюдалось снижение их концентрации. http://biotex.ibss.org.ua/
Tipo: Journal Contribution
Palavras-chave: Фотодеструкция пигментов; Сине–зеленые микроводоросли; Cyanophyceae; Pigments; Degradation Degradation Starvation Degradation Starvation http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_7375.
Ano: 2002
URL: http://repository.ibss.org.ua/dspace/handle/99011/386

Влияние спектрального состава света на рост и содержание пигментов в Synechococcus elongatus Nägeli
Provedor de dados: 13
Autores: Акимов, А. И.; Ефимова, Т. В.
У Synechococcus elongatus, адаптированной к свету различного спектрального состава (белый, синий, зелёный, красный), максимальная скорость роста наблюдалась на красном свету, а минимальная – на синем. На белом и зелёном свету скорости роста были примерно равны. Достоверных изменений внутриклеточного содержания пигментов и соотношения пигментов в клетках не наблюдалось, в связи с чем можно заключить, что у S. elongatus отсутствует комплиментарная хроматическая адаптация.
Tipo: Journal Contribution
Palavras-chave: Адаптация; Synechococcus elongatus; Спектральный состав света; Скорость роста; Пигменты; Адаптація; Спектральний склад світла; Швидкість зростання; Пігменти; Аdaptation; Spectral light composition; Growth rate; Pigments.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1916

Выращивание Dunaliella tertiolecta Butch. на модифицированной среде Ben–Amotz
Provedor de dados: 13
Autores: Бородина, А. В.; Дробецкая, И. В.
Предложен способ культивирования Dunaliella tertiolecta Butch. на модифицированной питательной среде Ben-Amotz при полной замене гидрокарбоната натрия на NaOH. Источником углерода для микроводорослей служат гидрокарбонат-ионы, образующиеся в щелочной среде из СО2 воздуха. Приведены ростовые и биохимические показатели дуналиеллы в условиях как частичного, так и полного исключения соды из состава среды. http://biotex.ibss.org.ua/
Tipo: Journal Contribution
Palavras-chave: Углеродное питание; Dunaliella tertiolecta; Питательная среда Ben–Amotz; Пигменты; Каротиноиды; Carbon feed; Medium of Ben-Amotz; Pigments; Carotenoids.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1742

Содержание фикобилипротеинов в некоторых видах красных водорослей Черного моря
Provedor de dados: 13
Autores: Поспелова, Н. В.; Нехорошев, М. В.
Исследовано содержание фикобилипротеинов – R-фикоэритрина и аллофикоцианина в некоторых видах наиболее распространенных в Черном море красных водорослей. В клетках водорослей количество R-фикоэритрина превышает количество аллофикоцианина. Показано, что содержание пигментов различно для разных видов багрянок и зависит от сезона года.
Tipo: Journal Contribution
Palavras-chave: Пигменты; Сезонные изменения; Водоросли; Черное море; Pigments; Seasons; Algae; The Black Sea Pigments Algae Pigments Algae http://aims.fao.org/aos/agrovoc/c_5875 http://aims.fao.org/aos/agrovoc/c_258.
Ano: 2002
URL: http://repository.ibss.org.ua/dspace/handle/99011/415

Genetic diversity of the harmful family Kareniaceae (Gymnodiniales, Dinophyceae) in France, with the description of Karlodinium gentienii sp. nov.: A new potentially toxic dinoflagellate
Provedor de dados: 5
Autores: 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

Premières propositions pour un indice de composition du phytoplancton, basé sur les résultats des méthodes pigments et diversité génétique. Action 3 - Indice Composition - Livrable 1. Rapport final, mars 2015.
Provedor de dados: 5
Autores: Siano, Raffaele; Delmas, Daniel; Lampert, Luis.
Tipo: Text
Palavras-chave: Phytoplancton; Pigments; Indice composition; Diversité pigmentaire; Metabarcoding; Picoplancton; Mamiellophyceae; Chlb; Golfe de Gascogne; Panache de la Gironde; Phytoplankton; Pigments; Composition index; Pigment diversity; Metabarcoding; Picoplankton; Mamiellophyceae; Chlb; Gulf of Biscay; River Gironde plume.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00361/47263/47228.pdf

New insights into the seasonal feeding ecology of Pecten maximus using pigments, fatty acids and sterols analyses
Provedor de dados: 5
Autores: Lavaud, Romain; Artigaud, Sebastien; Le Grand, Fabienne; Donval, Anne; Soudant, Philippe; Flye-sainte-marie, Jonathan; Strohmeier, Tore; Strand, Oivind; Leynaert, Aude; Beker, Beatriz; Chatterjee, Arnab; Jean, Fred.
We combined the use of pigments, fatty acids and sterols as biomarkers of the seasonal variation in food sources of the great scallop Pecten maximus. From March to October 2011, on a biweekly to twice-weekly basis, scallops and seawater from the water column and the water-sediment interface were collected in the Bay of Brest (Brittany, France). Pigment compositions in the seawater and in the stomach and rectum content of the scallops were analyzed by HPLC. Fatty acids and sterols from digestive gland (DG) tissue were analyzed by gas chromatography. Potential relationships between the temporal proportion of each marker in the environment and in the digestive tract were tested using multivariate analysis. Proportions of diatoms and Dinophyceae biomarkers...
Tipo: Text
Palavras-chave: Trophic ecology; Food sources; Pigments; Fatty acids; Trophic marker; Phytoplankton; Pecten maximus.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00431/54244/55772.pdf

Validation de l’indice composition IC Medit pour les eaux côtières de Corse et de la région PACA. Action 3. Indice Composition. Livrable n° B. Rapport final, juillet 2014.
Provedor de dados: 5
Autores: Goffart, Anne; Andral, Bruno.
The aim of this study is to show the current status of the development and use of the new IC Medit phytoplankton composition index as a sub-metric within the phytoplankton quality element in assessing phytoplankton quality in Mediterranean coastal waters. IC Medit uses pigment concentrations determined by HPLC for assessing phytoplankton composition. Focusing on coastal waters of Corsica, we (i) described the seasonal succession of the main phytoplankton groups in reference conditions, (ii) studied responses of phytoplankton groups to well identified drivers, (iii) assessed the shift of the seasonal succession of phytoplankton groups from the reference conditions in impacted areas, (iv) revealed pressure / impact relationships between nutrients and...
Tipo: Text
Palavras-chave: Phytoplancton; Indicateur de composition; Pigments; IC Medit; Relations pressions / impacts; Conditions de référence; Méditerranée; Corse; DCE; Phytoplankton; Indicator of community composition; Pigments; IC Medit; Pressure impact relationships; Reference conditions; Mediterranean Sea; Corsica; Water Framework Directive.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00361/47261/47226.pdf

Study on the microalgal pigments extraction process: Performance of microwave assisted extraction
Provedor de dados: 5
Autores: Pasquet, Virginie; Cherouvrier, Jean-rene; Farhat, Firas; Thiery, Valerie; Piot, Jean-marie; Berard, Jean-baptiste; Kaas, Raymond; Serive, Benoit; Patrice, Thierry; Cadoret, Jean-paul; Picot, Laurent.
The performance of microwaves irradiation (MAE and VMAE) to extract pigments from two marine microalgae was compared to conventional processes (cold and hot soaking and ultrasound-assisted extraction). Pigments were quantified by RP-HPLC and extraction performance was assessed regarding rapidity, reproducibility and extraction yields. Scanning electron microscopy was used at all extraction steps to assess the impact of the process on microalgal cell integrity. Freeze-drying and pigments extraction preserved microalgae cell integrity (except sonication) and evoked agglutination in superposed cells layers. All processes performed on Dunaliella tertiolecta (chlorophyte) lead to rapid pigments extraction, and equivalent pigments extraction yields, the absence...
Tipo: Text
Palavras-chave: Pigments; Microalgae; Microwave; Extraction; Chlorophyll; Fucoxanthin; Carotene; MAE; VMAE.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00029/14059/11533.pdf

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
Provedor de dados: 5
Autores: 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

Characteristics of the particulate matter during the Mai '92 experiment. Effect on ecophysiological functions on mussel and oyster populations.
Provedor de dados: 5
Autores: 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

Antiproliferative Activity of Cyanophora paradoxa Pigments in Melanoma, Breast and Lung Cancer Cells
Provedor de dados: 5
Autores: 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

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

Diversity in Xanthophyll Cycle Pigments Content and Related Nonphotochemical Quenching (NPQ) Among Microalgae: Implications for Growth Strategy and Ecology
Provedor de dados: 5
Autores: Lacour, Thomas; Babin, Marcel; Lavaud, Johann.
Xanthophyll cycle‐related non‐photochemical quenching, which is present in most photoautotrophs, allows dissipating excess light energy. Xanthophyll cycle‐related NPQ depends principally on xanthophyll cycle pigments composition and their effective involvement in non‐photochemical quenching. Xanthophyll cycle‐related NPQ is tightly controlled by environmental conditions in a species/strain specific manner. These features are especially relevant in microalgae living in a complex and highly variable environment. The goal of this study was to perform a comparative assessment of non‐photochemical quenching ecophysiologies across microalgal taxa in order to underline specific involvement of non‐photochemical quenching in growth adaptations and strategies. We...
Tipo: Text
Palavras-chave: Diatoxanthin; Diversity; Microalgae; Nonphotochemical quenching; Photoacclimation; Pigments; Xanthophyll cycle; Zeaxanthin.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00590/70243/68267.pdf

Photo-protective compounds in red macroalgae from Brittany: Considerable diversity in mycosporine-like amino acids (MAAs)
Provedor de dados: 5
Autores: Lalegerie, Fanny; Lajili, Sirine; Bedoux, Gilles; Taupin, Laure; Stiger-pouvreau, Valerie; Connan, Solène.
To cope with the biotic and abiotic stresses experienced within their environment, marine macroalgae have developed certain defence mechanisms including the synthesis of photo-protective molecules against light and particularly harmful UV radiation. The aim of this study was to screen selected red algae, a highly diverse phylogenetic group, for the production of photo-protective molecules. The pigment content and composition (i.e. chlorophyll-a, phycobiliproteins and carotenoids) and the composition of mycosporine-like amino acids (MAAs) were studied in 40 species of red macroalgae collected in Brittany (France), at two distinct periods (i.e. February and July 2017). A high inter-specific variability was demonstrated in terms of pigment content and MAA...
Tipo: Text
Palavras-chave: Algae; Diversity; HPLC; MAAs; Metabolites; Photo-protection; Pigments; Rhodophyta; Screening.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00488/59929/63133.pdf

Nanoplastics exposure modulate lipid and pigment compositions in diatoms
Provedor de dados: 5
Autores: Gonzalez-fernandez, Carmen; Le Grand, Fabienne; Bideau, Antoine; Huvet, Arnaud; Paul-pont, Ika; Soudant, Philippe.
The impact of nanoplastics (NP) using model polystyrene nanoparticles amine functionalized (PS–NH2) has been investigated on pigment and lipid compositions of the marine diatom Chaetoceros neogracile, at two growth phases using a low (0.05 μg mL−1) and a high (5 μg mL−1) concentrations for 96 h. Results evidenced an impact on pigment composition associated to the light-harvesting function and photoprotection mainly at exponential phase. NP also impacted lipid composition of diatoms with a re-adjustment of lipid classes and fatty acids noteworthy. Main changes upon NP exposure were observed in galactolipids and triacylglycerol's at both growth phases affecting the thylakoids membrane structure and cellular energy reserve of diatoms. Particularly,...
Tipo: Text
Palavras-chave: Diatoms; Nanoplastics; Lipid composition; Pigments.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00611/72283/71083.pdf

Etude de la dynamique et de la composition du phytoplancton via l'approche des pigments appliquée au littoral normand
Provedor de dados: 5
Autores: Hernandez Farinas, Tania; Menet-nedelec, Florence; M Zari, Lotfi; Courtay, Gaelle; Lampert, Luis.
We show the results of pigment analysis in High Performance Liquid Chromatography (HPLC), sampled between 2016 and 2017, on four sampling points in Normandy.
Tipo: Text
Palavras-chave: Phytoplancton; Pigments; Rapports pigmentaires; REPHY/RHLN; Environnement; Classes de taille; Phytoplankton; Pigments; Pigment ratio; REPHY/RHLN; Environment; Size classes.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00687/79903/82866.pdf

Allelochemicals from Alexandrium minutum induce rapid inhibition of metabolism and modify the membranes from Chaetoceros muelleri
Provedor de dados: 5
Autores: 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

Sedimentation pathways in the Indian sector of the Southern Ocean during a production regime dominated by regeneration
Provedor de dados: 5
Autores: Cailliau, C; Belviso, S; Goutx, M; Bedo, A; Park, Y; Charriaud, E.
During summer 1994, the production regime at 2 sites located in the Indian sector of the Southern Ocean, one in the Permanent Open Ocean Zone (POOZ) at 52 degrees S, and a second in the Seasonal Ice Zone (SIZ) at 63 degrees S, was dominated by regeneration (0.3 &lt; f-ratio &lt; 0.4). Two time series, each of about 4 d, were performed over pre-determined time intervals of 4 h using a free-floating sediment trap set at 200 m at the 2 sites. Hourly variations of C, N, chlorophyll a (chl a) and its degradation products, taxon-specific pigments, lipid classes and dimethylsulfoniopropionate (DMSP) were measured simultaneously. Measurements in the water column were done during the sediment trap drifting. Fucoxanthin, a typical diatom pigment, was the major...
Tipo: Text
Palavras-chave: Antarctic; Austral ocean; Sediment traps; Diel cycles; Phytoplankton; Pigments; Lipids; DMSP; DMS.
Ano: 1999
URL: https://archimer.ifremer.fr/doc/00240/35083/33651.pdf

Pigmentos carotenoides del camarón Artemesia longinaris Bate (Crustacea, Decapoda, Penaeidae)
Provedor de dados: 20
Autores: Carreto, J.I.; Carignan, M.O.
Caronetoids from caparace and internal organs of Artemesia longinaris were isolated and identified. The following carotenoid pigments were found in caparace: luteine, tunaxanthin diester, astaxanthin monoester and free astaxanthin. A much greater variety of pigments was isolated from internal organs: Ó- doradexanthin, a fucoxanthin derivate, chlorophylls degradation products and various xanthophylls in trace amounts. These pigments are of dietary origin. In the natural environment, A.longinaris takes preformed astaxanthin from the diet and transfers it to body tissues.
Tipo: Journal Contribution
Palavras-chave: Pigments; Carotenoids; Absorption spectra; Pigments; Carotenoids; Http://aims.fao.org/aos/agrovoc/c_5875; Http://aims.fao.org/aos/agrovoc/c_1333.
Ano: 1984
URL: http://hdl.handle.net/1834/2048

Phytoplankton composition in coastal lagoons of different trophic status in Northern Colombia determined by microscope and HPLC-Pigment analysis
Provedor de dados: 20
Autores: Gocke, K.; Meyerhöfer, M.; Mancera P., J.E.; Vidal, L.A.
The regional differences in the composition of the phytoplankton assemblages in several coastal lagoons of the “Outer Delta of the Río Magdalena” (Caribbean coast of Colombia) were determined using microscopic counting and HPLC-pigment measurements. The study sites can be classified as 1) a group of limnic lagoons with relatively low (5.5-19 µg/l) chlorophyll a (chl a) concentrations and high inorganic suspension loading, 2) a group of brackish lagoons with high (62-90 µg/l) chl a concentrations and high amounts of organic seston, (two further lagoons form a transition between group 1 and 2, and 3) a fully marine Caribbean bay with very low (0.3 µg/l) chl a and seston concentrations. The regional variations in salinity of the lagoons are due to inflow of...
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Pigments; Coastal lagoons; Phytoplankton; Pigments; Coastal lagoons; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_5875; Http://aims.fao.org/aos/agrovoc/c_1697.
Ano: 2003
URL: http://hdl.handle.net/1834/3200

Distribución de clorofila "a" y feopigmentos en el Estrecho Bransfield, Bahía Chile y Paso Drake durante el verano de 1998 (Antártica)
Provedor de dados: 20
Autores: 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

Distribución de clorofila "a" y feopigmentos en el Estrecho Bransfield, Bahía Chile y Paso Drake durante el verano de 1998 (Antártica)
Provedor de dados: 20
Autores: 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

False positives for tannin sorghum in non-tannin sorghum using the bleach test
Provedor de dados: 30
Autores: 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

THE ELEUSINES (A Review of the World Literature)
Provedor de dados: 30
Palavras-chave: Millets; Grain; Amino acids; Inorganic acid salts; Chromosomes; Nitrogen; Calcium; Sorghum; Pigments.
Ano: 2023
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3957

Ten Myths about Tannins in Sorghums
Provedor de dados: 30
Autores: Rooney, L.
Palavras-chave: Organic acids; Sorghum; Antioxidants; Pigments; Phenols; Linseed; Aromatic compounds; HPLC; Bakery products; Polymers.
Ano: 2005
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3264

Morphological diversity in finger millet germplasm introduced from Southern and Eastern Africa
Provedor de dados: 30
Autores: Upadhyaya, H.D.,( Hari D. Upadhyaya ).
Palavras-chave: Millets; Pigments; Germplasm; Genetic resources; Grain; Plant habit; Sorghum; Inorganic acid salts; Tropical zones; Nitrogen.
Ano: 2007
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3303

Characterization of world’s Foxtail Millet germplasm collections for morphological traits
Provedor de dados: 30
Autores: 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

A study of pigments in some developmental stages of &lt;i&gt;Aurelia aurita&lt;/i&gt; Lam
Provedor de dados: 27
Autores: Van den Branden, C.; Van den Sande, P.; Decleir, W.
Unfed polyps of &lt;i&gt;Aurelia aurita&lt;/i&gt; are white. Fed with &lt;i&gt;&lt;i&gt;Artemia&lt;/i&gt; salina&lt;/i&gt; 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

Rol de las macroalgas en el biomonitoreo de la contaminación en «Marchica», la laguna de Nador
Provedor de dados: 85
Autores: Ben Chekroun,K; Moumen,A; Rezzoum,N; Sánchez,E; Baghour,M.
The Aquatic system contamination by organic pollutants and heavy metals is one of the most serious problems that might face the environment and organisms as a whole. Interestingly, the accumulation of these pollutants is due to the anthropogenic activity, namely the intensive use of fertilizers to obtain high yields in crop production. In this paper, we compared the levels of chlorophylls, proteins, dry weight and sucrose in some red (Alsidium sp. and Gracilaria sp.) and green algae (Ulva sp.) collected from Mohandis, near Kariat and Bou Areg. Our results indicate that the algae collected nearby Bou Areg, an area well-known for its high agricultural activity, contained high levels of pigments, proteins and sugars. From the chlorophyll results, we conclude...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Algae; Biomonitoring; Carbohydrates; Nador lagoon; Phytoremediation; Pigments; Pollution; Proteins.
Ano: 2013
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572013000100005

Implications of the use of sorghum in broiler production
Provedor de dados: 89
Autores: 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 &amp;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 &amp;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

SENSITIVITY TO ENVIRONMENTAL STRESS OF PRATA,JAPIRA AND VITÓRIA BANANA CULTIVARS PROVEN BY CHLOROPHYLL a FLUORESCENCE
Provedor de dados: 94
Autores: SANTOS,PRISCILA NOBRES DOS; SILVA,DIOLINA MOURA; GALLON,CAMILLA ZANOTTI; VENTURA,JOSÉ AIRES.
ABSTRACT  This study aimed to evaluate the physiological responses to environmental stress during pre- and post-harvest of the following banana cultivars: Prata (AAB), Japira (AAAB) and Vitoria (AAAB). Analyses were carried out on young plants at vegetative stage (daughter-plant) and adult plants at reproductive stage (motherplant). The experimental design was completely randomized. In the in vivo pre-harvest analysis were used seven replications, in a factorial scheme (3x2x2), three cultivars and two stages (vegetative and reproductive) and two collection periods (March and June). For the analysis of post-harvest quality were used five replications in a factorial design (3x2x5), corresponding to three cultivars, two development stages and five periods of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Musa spp; Chlorophyll fluorescence; Pigments; Lipid peroxidation; Post-harvest quality.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000200203

Influence of laboratory cultivation on species of Rhodophyta physiological evaluations and antifungal activity against phytopathogens
Provedor de dados: 124
Autores: 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

UV-B radiation as an elicitor of secondary metabolite production in plants of the genus Alternanthera
Provedor de dados: 39
Autores: Klein,Fátima Rosane S.; Reis,Andressa; Kleinowski,Alítcia M.; Telles,Renata T.; Amarante,Luciano do; Peters,José A.; Braga,Eugenia Jacira B.
ABSTRACT Ultraviolet B radiation has been described as a potential elicitor agent of the synthesis of secondary metabolites in plants. Thus, the present study aimed to investigate the production of betalains and total flavonoids, as well as the antioxidant activity, of Alternanthera sessilis, A. brasiliana, A. tenella and A. philoxeroides exposed to different periods of UV-B radiation (280-315 nm). Plants of these four species were exposed to UV-B radiation for 0, 2, 4, 6, and 8 hours, which amounts to 0, 10, 20, 30, and 40 J cm−2 of radiation, respectively. Significant increases in betacyanin and betaxanthin levels were observed in A. sessilis and A. brasiliana during the period of UV-B exposure, while no differences were observed for the others species....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic elicitor; Antioxidants; Flavonoids; Medicinal plants; Pigments; Ultraviolet radiation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400615

Deleterious effect of TRIS buffer on growth rates and pigment content of Gracilaria birdiae Plastino &amp;amp; E.C. Oliveira (Gracilariales, Rhodophyta)
Provedor de dados: 39
Autores: 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

Milheto na alimentação de poedeiras - doi: 10.4025/actascianimsci.v33i1.9946
Provedor de dados: 2
Autores: Garcia, Ana Flávia Quiles Marques; Universidade Estadual de Maringá; Murakami, Alice Eiko; Universidade Estadual de Maringá; Furlan, Antonio Cláudio; Universidade Estadual de Maringá; Massuda, Ely Mitie; Centro Universitario de Maringá; Potença, Alexandra; Universidade Estadual de Maringá; Rojas, Ivan Camilo Ospina; Universidade Estadual de Maringá.
O presente trabalho teve como objetivo avaliar os efeitos da utilização de milheto como alimento energético, nas rações de poedeiras sobre o desempenho e qualidade de ovos, bem como realizar uma avaliação econômica a fim de verificar a viabilidade da utilização de milheto.  Foram utilizadas 336 poedeiras comerciais, distribuídas em um delineamento inteiramente casualizado com seis tratamentos, sete repetições e oito aves por unidade experimental. Os tratamentos consistiram em uma ração-testemunha à base de milho e farelo de soja e as demais com 20, 40, 60, 80 e 100% de substituição ao milho. A inclusão do milheto não influenciou o consumo de ração, porcentagem de postura, conversão alimentar e a qualidade interna e externa dos ovos. Para o índice de...
Tipo: Pesquisa de campo
Palavras-chave: 5.04.03.00-1 desempenho produtivo; Pigmentantes; Qualidade do ovo Nutrição e Alimentação Animal Performance; Pigments; Egg quality.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/9946

Extraction of bioactive compounds and free radical scavenging activity of purple basil (Ocimum basilicum L.) leaf extracts as affected by temperature and time
Provedor de dados: 42
Autores: 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

Enhanced biosynthesis of quercetin occurs as A photoprotective measure in Lycopersicon esculentum mill. under Acute UV-B exposure
Provedor de dados: 52
Autores: 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

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
Provedor de dados: 58
Autores: 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

Architecture and relevance of several strongly adhered biofilms over a polyester imide (PEI) surface
Provedor de dados: 58
Autores: 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

Carotenoid production in sugarcane juice and synthetic media supplemented with nutrients by Rhodotorula rubra l02
Provedor de dados: 58
Autores: 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

Effect of cobalt on growth, pigments and the photosynthetic electron transport in Monoraphidium minutum and Nitzchia perminuta
Provedor de dados: 61
Autores: 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

Interactive effects between supplemental ultraviolet-B radiation and heavy metals on the growth and biochemical characteristics of Spinacia oleracea L.
Provedor de dados: 61
Autores: Shweta,Mishra; Agrawal,S.B.
The impact of supplemental UV-B (sUV-B) radiation and heavy metals: Cd (68 µmol.kg-1 soil) and Ni (68 µmol.kg-1 soil) singly and in combination was studied on photosynthetic and non-photosynthetic pigments, metabolites, enzyme activities, biomass accumulation and the net primary productivity of spinach (Spinacia oleracea L. var. All Green), a common leafy vegetable plant. Both the stresses individually and in combination resulted in the reduction of photosynthetic pigments, ascorbic acid, and catalase activity, whereas a reverse trend was observed for anthocyanin, flavonoids and proline content, lipid peroxidation and peroxidase activity. The interactive effects of both the stresses were, however, less than additive. Combined treatment of sUV-B + Cd was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spinaicia oleracea; Biomass; Cadmium; Enzymes; Nickel; Pigments; Ultraviolet-B.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000200007

Salt stress and exogenous silicon influence physiological and anatomical features of in vitro-grown cape gooseberry
Provedor de dados: 65
Autores: Rezende,Renata Alves Lara Silva; Rodrigues,Filipe Almendagna; Soares,Joyce Dória Rodrigues; Silveira,Helbert Rezende de Oliveira; Pasqual,Moacir; Dias,Gabrielen de Maria Gomes.
ABSTRACT: Salt stress is one of several major abiotic stresses that affect plant growth and development, and there are many evidences that silicon can ameliorate the injuries caused by high salinity. This study presents the results of an assay concerning: (1) the effect of in vitro NaCl-induced salt stress in cape gooseberry plants and (2) the possible mitigating effect of silicon in saline conditions. For that, nodal segments were inoculated in Murashige and Skoog (MS) medium under salinity (0.5 and 1.0% NaCl) with different silicic acid concentrations (0, 0.5 and 1.0g L-1). Phytotechnical characteristics, photosynthetic pigments content, and leaf anatomy were evaluated after 30 days. Shoot length, root length, number of leaves and buds, fresh and dry...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physalis peruviana L.; Abiotic stress; Salinity; Pigments; Anatomy.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000100401

Postharvest conservation of alstroemeria ‘ajax’ using 1-methylcyclopropene
Provedor de dados: 64
Autores: Galati,Vanessa Cury; Muniz,Ana Carolina Corrêa; Guimarães,João Emmanuel Ribeiro; Inestroza-Lizardo,Carlos Orlando; Mattiuz,Claudia Machado Fabrino; Mattiuz,Ben-Hur.
ABSTRACT Cut flowers deteriorate quickly and require postharvest technologies to increase their durability, which is usually around 8 days. Due to the scarce information related to postharvest physiology of Alstroemeria cut flowers, this study aimed to verify the best dose of 1-methylcyclopropene (1-MCP) to the postharvest conservation of inflorescences of Alstroemeria cv. Ajax, considering the factors associated with floral senescence and loss of the decorative life. The stems were submitted to four doses of 1-MCP (0; 100; 250; 500 ppb), then placed in containers with distilled water and stored at room temperature (22 ºC). The treatments were performed in triplicate containing three stems per replicate. The evaluations were performed every three days for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ethylene; Longevity; Pigments; Enzyme activity.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000200181