Consulta: subjectFacets:"Growth kinetics"
Registros recuperados: 8
Data/hora: 08/06/2024 17:27:41

Cinética del crecimiento, desarrollo floral y acumulación de flavonoides en caléndula
Provedor de dados: 32
Autores: Palma Tenango, Mariana.
Caléndula (Calendula officinalis L.) tiene múltiples usos ornamentales, medicinales, industriales e incluso alimenticios. El capitulo floral es rico en flavonoides, mismos que tienen actividad antiinflamatoria y antioxidante. Este trabajo tuvo como finalidad, medir la concentración de flavonoides totales expresados como quercetina en capítulos florales, flores liguladas y flores tubulares en diferentes etapas de floración en, analizar la cinética de crecimiento y análisis preliminar de terpenoides. La mayor concentración de flavonoides totales expresados como quercetina en el capítulo floral fue de 177.77  mg g-1 de materia seca, en flores liguladas fue de   114.91 mg g-1 de materia seca y en flores tubulares de 181.30 mg g-1 de materia seca. La planta...
Tipo: Tesis
Palavras-chave: Calendula officinalis L.; Capítulo floral; Flavonoides; Etapas de desarrollo floral; Cinética de crecimiento; Maestría; Fisiología Vegetal; Floral capitulums; Flavonoids; Sages of flowering develoment; Growth kinetics.
Ano: 2009
URL: http://hdl.handle.net/10521/1562

Sequential use of ammonium and leucine as nitrogen sources during growth of Geotrichum candidum on a glucose based medium
Provedor de dados: 69
Autores: Adour,Lydia; Bude,Florence; Amrane,Abdeltif.
Geotrichum candidum growth on ammonium and leucine as nitrogen sources and glucose as a carbon source was examined. A clear preference of G. candidum for ammonium over leucine as a nitrogen source was shown. Indeed, ammonium was completely exhausted at the end of exponential growth after less than 35 hrs of culture; in contrast only 5% of leucine was concomitantly assimilated. Growth continued at slower rates on glucose and leucine as carbon and nitrogen sources respectively, and at the end of culture (185 hrs), leucine was completely exhausted.
Tipo: Journal article
Palavras-chave: Amino acids; Batch culture; Diauxic growth; Geotrichum candidum; Growth kinetics.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000100013

Carbon Dioxide Biofixation and Production of Spirulina sp. LEB 18 Biomass with Different Concentrations of NaNO3 and NaCl
Provedor de dados: 52
Autores: Moraes,Luiza; Rosa,Gabriel Martins da; Souza,Michele da Rosa Andrade Zimmermann de; Costa,Jorge Alberto Vieira.
ABSTRACT Microalgae are efficient at using solar energy to turn CO2 and nutrients into biomass containing lipids, proteins, carbohydrates and other compounds that may be used to produce bioproducts for human and animal consumption and pharmaceutical use. The aim of this study was to assess the effect of the NaNO3 and NaCl concentration on the growth kinetics, the biomass composition and the ability to biofix CO2 using the microalga Spirulina sp. LEB 18. The assays were carried out according to a 22 central composite design (CCD) with different concentrations of NaNO3 (1.25, 1.88 and 2.50 g L-1) and NaCl (1.00, 15.0 and 30.0 g L-1). The assays were carried out in 2 L vertical tubular photobioreactors at 30°C, 12 h light/dark and an injection of 12.0% v/v of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CO2; Fixation; Growth kinetics; Microalgae; Nutrients.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100410

Catechol biodegradation kinetics using Candida parapsilopsis
Provedor de dados: 52
Autores: Rigo,Maurício; Alegre,Ranulfo Monte; Bezerra,José Raniere Mazile Vidal; Coelho,Narjara; Bastos,Reinaldo Gaspar.
This study evaluated the biodegradation of catechol by a yeast strain of Candida parapsilopsis in standard medium in Erlenmeyer flasks. Results shown that the highest concentration of catechol caused the longer lag period, demonstrating that acclimatized cultures could completely degrade an initial catechol concentration of 910 mg/L within 48 h. Haldane's model validated the experimental data adequately for growth kinetics over the studied catechol concentration ranges of 36 to 910 mg/L. The constants obtained for this model were µmax = 0.246 h-1, Ks = 16.95 mg/L and Ki = 604.85 mg/L.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Candida parapsilopsis; Biodegradation; Catechol; Growth kinetics; Equation of Haldane; Substrate inhibition.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000200029

Screening of wild type Streptomyces isolates able to overproduce clavulanic acid
Provedor de dados: 58
Autores: Marques,Daniela A. Viana; Santos-Ebinuma,Valéria de Carvalho; Oliveira,Patrícia Maria Sobral de; Lima,Gláucia Manoella de Souza; Araújo,Janete M.; Lima-Filho,José L.; Converti,Attilio; Pessoa-Júnior,Adalberto; Porto,Ana L.F.
The selection of new microorganisms able to produce antimicrobial compounds is hoped for to reduce their production costs and the side effects caused by synthetic drugs. Clavulanic acid is a β-lactam antibiotic produced by submerged culture, which is widely used in medicine as a powerful inhibitor of β-lactamases, enzymes produced by bacteria resistant to antibiotics such penicillin and cephalosporin. The purpose of this work was to select the best clavulanic acid producer among strains of Streptomyces belonging to the Microorganism Collection of the Department of Antibiotics of the Federal University of Pernambuco (DAUFPE). Initially, the strains were studied for their capacity to inhibit the action of β-lactamases produced by Klebsiella aerogenes ATCC...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Clavulanic acid; Β-lactamases inhibitor; Streptomyces screening; Submerged culture; Growth kinetics.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300022

Molecular characterization of a Xylanase-producing fungus isolated from fouled soil
Provedor de dados: 58
Autores: Sakthiselvan,Punniavan; Naveena,Balakrishnan; Partha,Nagarajan.
Xylanase (EC 3. 2. 1. 8), hydrolyzes xylo-oligosaccharides into D-xylose and required for complete hydrolysis of native cellulose and biomass conversion. It has broad range of applications in the pulp and paper, pharmaceutical and Agri-food industries. Fifty fungal species were isolated from the fouled soil around an oil refinery and screened for the production of xylanase enzyme by enrichment culture techniques. The isolated fungal strain was identified as Hypocrea lixii SS1 based on the results of biochemical tests and 18s rRNA sequencing. The phylogenetic tree was constructed using the MEGA 5 software. Further, Hypocrea lixii SS1 was tested for the ability to utilize the sunflower oil sludge (waste from the oil industry) as the sole carbon source for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fungal isolate; Growth kinetics; Hypocrea lixii SS1; Fermentation; Xylanase; Purification.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400020

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

Growth kinetics of Mycobacterium tuberculosis measured by quantitative resazurin reduction assay: a tool for fitness studies
Provedor de dados: 58
Autores: von Groll,Andrea; Martin,Anandi; Portaels,Françoise; Silva,Pedro Eduardo Almeida da; Palomino,Juan Carlos.
We standardized a method to evaluate the growth kinetics of Mycobacterium tuberculosis by measuring quantitatively the reduction of resazurin by spectrophotometry. Growth curves and the rate of growth of twenty-one M. tuberculosis clinical isolates were determined. The method showed technical simplicity and is inexpensive to assess the fitness of each isolate.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth kinetics; Mycobacterium tuberculosis; Resazurin; Fitness.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000200006