Consulta: subjectFacets:"Nitrogen source"
Registros recuperados: 6
Data/hora: 02/06/2024 12:48:19

Effect of Nitrate, Ammonium and Urea on Growth and Pinnatoxin G Production of Vulcanodinium rugosum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Abadie, Eric; Kaci, Lamia; Berteaux, Tom; Hess, Philipp; Sechet, Veronique; Masseret, Estelle; Rolland, Jean-luc; Laabir, Mohamed.
ulcanodinium rugosum, a recently described dinoflagellate species producing a potent neurotoxin (pinnatoxin G), has been identified in French Mediterranean lagoons and was responsible for recurrent episodes of shellfish toxicity detected by mouse bioassay. Until now, the biology and physiology of V. rugosum have not been fully investigated. We studied the growth characteristics and toxicity of a V. rugosum strain (IFR-VRU-01), isolated in the Ingril lagoon in June 2009 (North-Western French Mediterranean Sea). It was cultivated in Enriched Natural Sea Water (ENSW) with organic (urea) and inorganic (ammonium and nitrate) nitrogen, at a temperature of 25 °C and irradiance of 100 μmol/m2·s−1. Results showed that ammonium was assimilated by cells more rapidly...
Tipo: Text
Palavras-chave: Vulcanodinium rugosum; Pinnatoxin G; Ingril lagoon; Growth; Nitrogen source.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00276/38748/37290.pdf

MICROBIAL OILS AND FATTY ACIDS: EFFECT OF CARBON SOURCE ON DOCOSAHEXAENOIC ACID (C22:6 N-3, DHA) PRODUCTION BY THRAUSTOCHYTRID STRAINS
Provedor de dados: Journal of Soil Science and Plant Nutrition
Autores: Shene,C; Leyton,A; Esparza,Y.; Flores,L; Quilodrán,B; Hinzpeter,I; Rubilar,M.
Thraustochytrids are marine protists found throughout the world in estuarine and marine habitats. These microorganisms have attracted interest, because their lipids contain different long chain polyunsaturated fatty acids (PUFAs). Those able to produce docosahexaenoic acid (C22:6 n-3, DHA) are the most studied because of the physiological importance of this PUFA in human beings. Their heterotrophic cultivation offers several challenges since biomass, lipid content, and fatty acid profile are dependent on growth conditions. In this work the effects of C source and its concentration on DHA production by different thraustochytrid strains are reviewed. Results obtained by different investigators on the use of alternative and low cost nutrient sources for...
Tipo: Journal article
Palavras-chave: Thraustochytrium; Schizochytrium; Docosahexaenoic; Acid; Polyunsaturated fatty acids; Lipids; Carbon source; Nitrogen source.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162010000100002

Plant architecture of Paspalum vaginatum schwartz modified by nitrate and ammonium nutrition
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Beltrano,José; Ronco,Marta Guillermina; Barreiro,Roberto; Montaldi,Edgardo Raúl.
Paspalum vaginatum Schwartz plants were grown under greenhouse conditions in a continuous-flow hydroponic culture, containing NO3- or NH4+or NH4NO3 as nitrogen source. After 30 days, the size of aerial biomass and root system decreased significantly when plants were supplied with NH4+as exclusive nitrogen source. Compared to NO3- treatment, reducing and non-reducing sugars were decreasing together with a significant increase in amino acids content. NH4+-nutrition caused tillers to grow toward an orthogravitropic position (average angle of 68° with respect to the horizontal), and with NO3--nutrition, tillers tended to become diagravitropic (average angle of 23°). With NH4NO3 all the parameters measured had values in between those of the other two sources....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen source; Orthogravitropism; Diagravitropism; Sucrose.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000700007

Optimal Nitrogen Fertilization Rates in Winter Wheat Production as Affected by Risk, Disease, and Nitrogen Source
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Roberts,   Roland K.; Walters,   Jeremy T.; Larson,   James A.; English,   Burton C.; Howard,   Donald D.
Interactions among the nitrogen (N) fertilization rate, N source, and disease severity can affect mean yield and yield in conservation tillage wheat production.  A Just-Pope model was used to evaluate the effects of N rate, N source, and disease on the spring N fertilization decision.  Ammonium nitrate (AN) was the utility-maximizing N source, regardless of risk preferences.  The net-return-maximizing AN rate was 92 lb N/acre, providing $0.52/acre higher net returns than the best alternative N source (urea).  If a farmer could anticipate a higher-than-average Take-All Root Rot infection, the difference in optimal net returns between AN and urea would increase to $35.11/acre.
Tipo: Journal Article
Palavras-chave: Certainty equivalent; Blume-Blotch; Nitrogen fertilizer; Nitrogen source; Risk; Take-All; Winter wheat; D21; D81; Q12.
Ano: 2004
URL: http://purl.umn.edu/43444

Effects of different sources of nitrogenous fertilizer on Guatemala corn yields
Provedor de dados: Thai Agricultural Research Repository
Autores: Phaderm Titatan; Samnao Phetchawee.
1 table
Palavras-chave: Corn; Maize; Guatemala corn; Nitrogen fertilizers; Nitrogen source; Yields; ข้าวโพด; พันธุ์กัวเตมาลา; ผลผลิต; ปุ๋ยไนโตรเจน; แหล่งไนโตรเจน.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3733

Production of docosahexaenoic acid by Aurantiochytrium sp. ATCC PRA-276
Provedor de dados: Brazilian Journal of Microbiology
Autores: Furlan,Valcenir Júnior Mendes; Maus,Victor; Batista,Irineu; Bandarra,Narcisa Maria.
Abstract The high costs and environmental concerns associated with using marine resources as sources of oils rich in polyunsaturated fatty acids have prompted searches for alternative sources of such oils. Some microorganisms, among them members of the genus Aurantiochytrium, can synthesize large amounts of these biocompounds. However, various parameters that affect the polyunsaturated fatty acids production of these organisms, such as the carbon and nitrogen sources supplied during their cultivation, require further elucidation. The objective of this investigation was to study the effect of different concentrations of carbon and total nitrogen on the production of polyunsaturated fatty acids, particularly docosahexaenoic acid, by Aurantiochytrium sp. ATCC...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon source; Docosahexaenoic acid; Nitrogen source; Polyunsaturated fatty acids; Thraustochytrids.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000200359