Consulta: subjectFacets:"Citric acid"
Registros recuperados: 24
Data/hora: 10/06/2024 10:28:14

Modelos de curvas de deshidratado de plátano roatan en verde (Musa acuminata).
Provedor de dados: 32
Autores: Pérez Prado, José Adán.
El plátano es el frutal en segundo lugar en importancia económica en México, el 95% se destina al consumo nacional y el 5% restante a la exportación. No obstante, las pérdidas por manejo postcosecha justifican buscar métodos para conservarlo. El plátano presenta cambios en volumen debido al intercambio de calor y masa, por lo que decrece su superficie bajo la contracción de los tejidos por pérdida parcial de agua. En consecuencia, todos los parámetros que dependen de cambios de dimensión interna y externa, requieren del uso de modelos de simulación mediante curvas de secado que nos permitan describir dicho comportamiento en los alimentos. Por lo anterior, el presente trabajo presenta una serie de modelos de regresión (exponencial, lineal, logarítmico y...
Palavras-chave: Acido cítrico; Enzimas; Obscurecimiento; Harina; Madurez; Citric acid; Enzyme; Darkening; Flour; Ripening; Maestría Tecnológica; Agroindustria.
Ano: 2010
URL: http://hdl.handle.net/10521/331

Valorization of raw glycerol for citric acid production by Yarrowia lipolytica yeast
Provedor de dados: 69
Autores: Rywinska,Anita; Rymowicz,Waldemar; Marcinkiewicz,Marta.
In the present report, citric acid production from raw glycerol in two fed-batch systems by acetate negative-mutants of Yarrowia lipolytica: Wratislavia 1.31 and Wratislavia AWG7 was compared. In the system, in which the total glycerol concentration was 200 g&amp;#8729;L-1, the substrate was added by pulsed additions, and in the other, in which the total glycerol concentration was 300 g&amp;#8729;L-1, the substrate was added at a constant feeding rate of 1.4 g&amp;#8729;h-1. Despite high citric acid concentrations (155.2 and 157.5 g&amp;#8729;L-1 with Y. lipolytica Wratislavia 1.31 and Y. lipolytica Wratislavia AWG7, respectively) obtained from 300 g&amp;#8729;L-1 of glycerol, the yield of citric acid was similar, i.e. about 0.6 g&amp;#8729;g-1. The...
Tipo: Journal article
Palavras-chave: Citric acid; Fed-batch culture; Yarrowia lipolytica; Raw glycerol.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000400009

Citric acid production from glucose by yeast Candida oleophila ATCC 20177 under batch, continuous and repeated batch cultivation
Provedor de dados: 69
Autores: Anastassiadis,Savas; Rehm,Hans-Jürgen.
The effect of air saturation on citric acid production in batch, repeated batch and chemostat cultures has been studied. It was shown that, under continuous fermentation (chemostat mode), the highest concentration of citric acid equal of 98 g/l was produced at 20% of air saturation. In contrary to continuous fermentation, displaying an optimum at 20%, 80% air saturation yielded higher values in repeated batch fermentation process. 167 g/l citric acid were produced continuously with the fill and drain technique at 4.85 days, at 80% air saturation, compared with 157.6 g/l achieved within 5.4 days at 20%. Under repeated batch fermentation, the formation rate of the generic product (Rj) as well as the specific citric acid productivity (m p) reached a maximum...
Tipo: Journal article
Palavras-chave: Air saturation influence; Chemostat; Citric acid; Citric acid fermentation; Repeated batch; Oxygen influence.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000100005

Oxygen and temperature effect on continuous citric acid secretion in Candida oleophila
Provedor de dados: 69
Autores: Anastassiadis,Savas; Rehm,Hans-Jürgen.
The influence of air saturation and temperature on continuous citric acid secretion was studied in chemostat cultures of Candida oleophila ATCC 20177 (var.). Simultaneous measurements of intra- and extracellular concentration of glucose, citric and isocitric acid confirmed the involvement of a specific active transport system in citrate secretion, favouring citric acid over isocitrate. An optimum air oxygen saturation of 20% and temperature of 30-31&amp;ordm;C were determined for the continuous citric acid secretion. The highest values of citric acid concentration (98 g/L), citrate to isocitrate ratio (33.3:1), volumetric citric productivity (1.8 g/(L x h)), and specific citric acid productivity (0.1 g/(g x h)), were reached at 20% air saturation at a...
Tipo: Journal article
Palavras-chave: Candida oleophila; Citric acid; Citric acid secretion.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000400010

Influences of phenolic compounds on citric acid productivity by Aspergillus niger in stirred fermentor
Provedor de dados: 69
Autores: Çevrml,Bekir Stk; Karipta,Ergin; Yaar,Ahmet; Ytolu,Mustafa.
Influences of phenol, ?-naphtol and ?-naphtol, which are toxic chemicals, on citric acid biosynthesis and biomass in the artificial culture setting of Aspergillus niger using batch fermenter are examined in the most favorable fermentation conditions, and a model is proposed. Addition of certain concentrations of phenol, ?-naphtol and ?-naphtol to the culture increases the citric acid production. According to this model, maximum citric acid concentration is 48.3 g L-1 in a culture that does not contain any toxic chemicals, whereas the maximum concentrations obtained in cultures containing 25 mg L-1 phenol, 25 mg L-1 alpha-naphtol and 15 mg L-1 beta-naphtol are 62.5 g L-1, 78.1 g L-1 and 86.0 g L-1, respectively. Moreover, addition of toxic chemicals to the...
Tipo: Journal article
Palavras-chave: A. niger; Citric acid; Fermenter; Toxic chemicals (phenols).
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000600008

THE ROLE OF COTRIC ACID AS A PHOSPHORUS MOBILIZATION MECHANISM IN HIGHLY P-FIXING SOILS
Provedor de dados: 73
Autores: Drouillon,M.; Merckx,R.
Exudation of low molecular weight carboxylates is an important phosphorus (P) acquisition strategy for plants in strongly P-fixing soils. The effect of citrate exudation on P availability was studied in five acid soils with a large organic matter content and a low available P pool. The amount of molybdate reactive P extracted by citric acid 10 mM (0.1-2 mg kg-1) was larger than the molybdate reactive P (MRP) extracted by CaCl2 10-3 M (0.007-0.07 mg kg-1). Both extractants were adjusted to soil pH prior to extraction. Also, the total P content of citric acid extracts (2-44 mg kg-1) far exceeded the total P content of CaCl2 (0.2-1.5 mg kg-1). However, ratios of MRP to total dissolved P (TDP) remained constant. When citric acid was added to the CaCl2-extracts...
Tipo: Journal article
Palavras-chave: Andosols; Citric acid; Phosphorus availability.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000100009

Cambios en los compuestos volátiles de un concentrado de sabor limón por la presencia de ácido cítrico
Provedor de dados: 20
Autores: Pino, J. A.; Sauri-Duch, E.; Cuevas-Glory, L.
En el presente trabajo se estudiaron los cambios de los componentes volátiles de un concentrado de sabor limón para preparar bebidas de limón durante 6 meses de conservación a 40 ºC. Se identificaron 44 compuestos aislados mediante microextracción en fase sólida del espacio de cabeza en combinación con la cromatografía de gases- espectrometría de masas. El limoneno, γ-terpineno, acetato de citronelilo, acetato de nerilo y acetato de geranilo, disminuyeron su contenido significativamente, mientras que el 1,4-cineol, 1,8-cineol, p-cimeno, p-cimeneno, p-menta-1,3- dien-8-ol, α-terpineol,  trans-α-bergamoteno, ar-curcumeno, (E,E)-α-farneseno y β-bisaboleno la incrementaron. El neral y geranial parecen disminuir su contenido, pero estos cambios no explican todo...
Tipo: Journal Contribution
Palavras-chave: Volatile compounds; Stability; Flavourings; Concentrates; Lemons; Spoilage; Citric acid.
Ano: 2008
URL: http://hdl.handle.net/1834/4893

WHAT CAN WE LEARN FROM THE ADM GLOBAL PRICE CONSPIRACIES?
Provedor de dados: 31
Autores: Connor,   John M.
ADM was at the center of two large global price-fixing conspiracies.  Buyers were overcharged $116 to $378 million in the United States.  Market structure and corporate management style facilitated these cartels.  The criminal prosecutions and defendants' legal strategies were both laudatory, but civil plaintiffs were short-changed.  ADM has undergone severe management restructuring, but the effectiveness of apprehending global cartels with national legal enforcement is questionable.
Tipo: Working or Discussion Paper
Palavras-chave: Price fixing; Global cartel; Antitrust; Citric acid; Market structure; Structural change; Lysine; International trade; Archer Daniels Midland; Welfare analysis; Demand and Price Analysis.
Ano: 1998
URL: http://purl.umn.edu/28621

ARCHER DANIELS MIDLAND: PRICE FIXER TO THE WORLD  (Third Edition)
Provedor de dados: 31
Autores: Connor,   John M.
Both market structure and corporate practices of Archer Daniels Midland fostered the implementation of the largest price-fixing conspiracies seen in modern times. The overcharges imposed on U.S. buyers of lysine and citric acid during 1994-1995 by ADM and its co-conspirators amounted to at least $250 million, and the total amount of public penalties, private damages, and legal costs exceeds $740 million.  Perpetrators of price-fixing now face monetary exposures that are five times the amount of the harm caused to buyers.  These events have spurred renewed attention by U.S. antitrust authorities in prosecuting international cartels.
Tipo: Working or Discussion Paper
Palavras-chave: Price fixing; Lysine; Citric acid; Sweeteners; Wet-corn milling; Starch industry; Archer Daniels Midland; Market structure; Monopoly overcharge; Antitrust law; Legal damages; U.S. Department of Justice; Demand and Price Analysis.
Ano: 1998
URL: http://purl.umn.edu/28680

ARCHER DANIELS MIDLAND: PRICE FIXER TO THE WORLD
Provedor de dados: 31
Autores: Connor,   John M.
Both market structure and corporate practices of Archer Daniels Midland fostered the implementation of the largest price- fixing conspiracies seen in modern times.  These events have spurred renewed attention by U.S. antitrust authorities in prosecuting international cartels.  The overcharges imposed on buyers of lysine and citric acid during 1994-1995 by ADM and its co-conspirators amounted to at least $200 million, and the total amount of public penalties, private damages, and legal costs exceeds $500 million. Perpetrators of price-fixing now face monetary exposures that are five times the amount of the harm caused to buyers.
Tipo: Working or Discussion Paper
Palavras-chave: Price fixing; Lysine; Citric acid; Sweeteners; Wet-corn milling; Starch industry; Archer Daniels Midland; Market structure; Monopoly overcharge; Antitrust law; Legal damages; U.S. Department of Justice; Demand and Price Analysis.
Ano: 1997
URL: http://purl.umn.edu/28653

Effect of acidified drinking water on the recovery of Salmonella enteritidis from broiler crops
Provedor de dados: 89
Autores: Avila,LAF de; Nascimento,VP do; Canal,CW; Salle,CTP; Moraes,HL de S.
Crop is a known source of Salmonella contamination during broiler carcass processing. The effect of drinking water acidification by lactic acid or citric acid or a combination of those with cupric sulfate and d-limonene in the reduction of Salmonella Enteritidis (SE) recovered from the crop of broilers was evaluated. Treatments were administered during 8 hours of preslaughter fasting period (Experiments I and II) and during the last 32 hours of preslaughter (Experiment III). It was observed that acidification reduced water intake when treatments began at preslaughter feed withdrawal, and affected the possible reducing effect of these acids on SE recovering (Experiments I and II). Water intake during preslaughter feed withdrawal was not affected when...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broilers; Citric acid; Crop; Cupric sulphate; D-Limonene; Lactic acid; Organic acids; Pre-slaughter feed withdrawal; Salmonella enteritidis.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000300005

Organic acid adsorption and mineralization in oxisols with different textures
Provedor de dados: 90
Autores: Andrade,Felipe Vaz; Mendonça,Eduardo de Sá; Silva,Ivo Ribeiro da.
Organic acids play an important role in the nutritional conditions of plants. Their relevance is related to their formation dynamics, mineralization rate and adsorption by soil colloids. This study was carried out to evaluate the dynamics of mineralization and adsorption of organic acid (acetic acid - AA, citric acid - CA and humic acid - HA) applied to the soil. Samples of two Oxisols were used: Rhodic Haplustox (LV) and Typic Haplustox (LVA). The mineralization experiment was arranged in a 2 x 3 x 5 factorial design, based on the factors: two soils (LV and LVA) x three organic acid (OA) types (AA, CA and HA) x five OA rates (0, 1, 2, 4, and 8 mmol dm-3). Organic carbon mineralization in samples was measured by the C-CO2 efflux, produced by the microbial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citric acid; Humic acids; Sorption; Biodegradation.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400015

Acid Ammonium Citrate as P Extractor for Fertilizers of Varying Solubility
Provedor de dados: 90
Autores: Santos,Wedisson Oliveira; Mattiello,Edson Marcio; Barreto,Matheus Sampaio Carneiro; Cantarutti,Reinaldo Bertola.
ABSTRACT: There are several globally accepted methods to chemically characterize P-fertilizers, but not all are suitable to predict the agronomic efficiency of the P sources in terms of plant nutrition. Our aim was to investigate the performance of P extractors for fertilizers, investigating the consistency of different methods for P sources of varying properties and the related plant responses. The experiment was carried out in a greenhouse, using corn as a model plant. Phosphorus values extractable in water, 2 % citric acid, 2 % formic acid, ammonium neutral citrate + water, and acid ammonium citrate were evaluated for eight P fertilizers of varied solubility and correlated with P uptake by corn. The extractors citric acid and formic acid recovered no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus fertilizers; Citric acid; Ammonium neutral citrate.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100503

Characterization of Ornamental Rock Residue and Potassium Liberation Via Organic Acid Application
Provedor de dados: 90
Autores: Machado,Ramires Ventura; Andrade,Felipe Vaz; Passos,Renato Ribeiro; Ribeiro,Roberto Carlos da Conceição; Mendonça,Eduardo Sá; Mesquita,Luiz Felipe.
ABSTRACT Organic acids present in organic matter and, or, exudates by microorganisms and plants can increase the liberation of potassium present in minerals. The objective of this study was to characterize the residue from ornamental rocks and evaluate the release of K from these residues after the application of organic acids. The experiment was conducted under laboratory conditions and followed a 2 × 3 × 5 factorial design with three replicates. The studied factors were: two organic acids (citric acid and malic acid), three ornamental rock residues (R1, R2 and R3) and five organic acid rates (0, 5, 10, 20 and 40 mmol L-1). After agitation, K concentrations were determined in the equilibrium solution. Successive extractions were performed (1, 5, 10, 15,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stonemeal; Fertilization; Citric acid; Silicate rocks.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100505

Preservation of minimally processed 'aurora-1' peaches using additives
Provedor de dados: 94
Autores: Martins,Ramilo Nogueira; Mattiuz,Ben-Hur; Santos,Leandra Oliveira; Morgado,Cristiane Maria Ascari; Mattiuz,Claudia Fabrino Machado.
'Aurora-1' peaches establishes an interesting alternative as a minimally processed product, due to its characteristics like flavor, color, smell, and also because of its handling resistance. However, it has a short shelf life after a fresh-cut due to enzymatic browning and stone cavity collapse. The main purpose of this research was to test the additive with antioxidant effect to prevent browning in minimally processed 'Aurora-1' peaches. The minimal processing consists of washing, sanitizing, peelings and fruit stone extraction. After that, longitudinal cuts were made to obtain eight segments per fruit. The slices were immersed into the following treatment solutions: control (immersion in 2% ascorbic acid); 2% ascorbic acid + 2% calcium chloride; 1%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ascorbic acid; Calcium chloride; Cysteine; Citric acid; Isoascorbate.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000400023

Postharvest quality of strawberry (Fragaria χ ananassa (Duchesne ex Weston) Duchesne ex Rozier) genotypes according to vernalization
Provedor de dados: 109
Autores: Santacruz Oviedo,Victoria Rossmary; Cabral,Moisés; Enciso Garay,Cipriano Ramón; de Jesús Cabrera Arredondo,Graciela Antonia.
Abstract Strawberry production in Paraguay is carried out by small producers, using minimal technology and obtaining low productivity, with the need to expand strawberry genotypes and production techniques. The aim of this study was to evaluate fruit quality of strawberry genotypes according to vernalization. A randomized block design with factorial arrangement 14x2 was performed; factors were genotypes and chilling using 15 plants per treatment and three replicates. Plants were kept in cold room at 5°C, with 8 hours of artificial light and 16 of darkness for a period of 25 days. Five fruits were used per treatment and were evaluated as follows: the amount of total soluble solids, titratable acidity and ratio of total soluble solids to titratable acidity,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citric acid; Mass loss; Temperature; Total soluble solids; Titratable acidity.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000200208

Physiological Role of Ascobin on Quality and Productivity of Sunflower Plants Irrigated with Sodium Chloride Solution
Provedor de dados: 111
Autores: Dawood, Mona Gergis.
Ascobin had a promotion effect on growth and active constituents’ compounds of various plants under normal and stressed conditions. The physiological response of sunflower plant to foliar application of ascobin treatments (200,400,600 ppm) was investigated either under normal or salinity stressed conditions (5000 ppm NaCl solution) in pot experiments at the wire-house of the National Research Centre, Dokki, Cairo, Egypt. Data revealed that salinity stress caused significant decreases in shoot height, leaf area chlrorophyll b, carotenoids, total photosynthetic pigments, seed yield, yield components, oil and protein content of the yielded seeds relative to control. The decrease in oil percentage was more obvious by salinity than protein percentage. Since...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helianthus annuus L.; Ascorbic acid; Citric acid; Seed quality; Antioxidant enzymes.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4375

Relation between citric acid production by solid-state fermentation from cassava bagasse and respiration of Aspergillus niger LPB 21 in semi-pilot scale
Provedor de dados: 52
Autores: Prado,Flávera Camargo; Vandenberghe,Luciana Porto de Souza; Soccol,Carlos Ricardo.
The aim of this work was to study the relation between citric acid production and respiration of Aspergillus niger LPB 21 in solid-state fermentation of cassava bagasse. The experiments were carried out in horizontal drum bioreactor coupled with a gas chromatography system. Fermentation was conduced for 144 h with initial substrate moisture of 60% using heat-treated cassava bagasse as sole carbon source. The exhausted air from the bioreactor was analyzed for the monitoring of CO2 produced and O2 consumed in order to estimate the biomass biosynthesis by the fungal culture. The metabolic activity of A. niger growth was associated to citric acid production. The system using FERSOL software determined 4.372 g of biomass/g of consumed O2. Estimated and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citric acid; Solid-state fermentation; Cassava bagasse; Horizontal drum bioreactor; Fungus respiration.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000400004

Microbial production of citric acid
Provedor de dados: 52
Autores: Vandenberghe,Luciana P. S; Soccol,Carlos R; Pandey,Ashok; Lebeault,Jean-Michel.
Citric acid is the most important organic acid produced in tonnage and is extensively used in food and pharmaceutical industries. It is produced mainly by submerged fermentation using Aspergillus niger or Candida sp. from different sources of carbohydrates, such as molasses and starch based media. However, other fermentation techniques, e.g. solid state fermentation and surface fermentation, and alternative sources of carbon such as agro-industrial residues have been intensively studied showing great perspective to its production. This paper reviews recent developments on citric acid production by presenting a brief summary of the subject, describing micro-organisms, production techniques, and substrates, etc.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citric acid; Aspergillus niger; Submerged fermentation; Solid state fermentation; Substrates.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000300001

Citric acid production from orange peel wastes by solid-state fermentation
Provedor de dados: 58
Autores: Torrado,Ana María; Cortés,Sandra; Salgado,José Manuel; Max,Belén; Rodríguez,Noelia; Bibbins,Belinda P; Converti,Attilio; Domínguez,José Manuel.
Valencia orange (Citrus sinensis) peel was employed in this work as raw material for the production of citric acid (CA) by solid-state fermentation (SSF) of Aspergillus niger CECT-2090 (ATCC 9142, NRRL 599) in Erlenmeyer flasks. To investigate the effects of the main operating variables, the inoculum concentration was varied in the range 0.5·10³ to 0.7·10(8) spores/g dry orange peel, the bed loading from 1.0 to 4.8 g of dry orange peel (corresponding to 35-80 % of the total volume), and the moisture content between 50 and 100 % of the maximum water retention capacity (MWRC) of the material. Moreover, additional experiments were done adding methanol or water in different proportions and ways. The optimal conditions for CA production revealed to be an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Orange peel; Citric acid; Aspergillus niger; Solid-state fermentation.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100049

Selection of 5-fluorocytosine-resistant mutants from an Aspergillus niger citric acid-producing strain
Provedor de dados: 58
Autores: Conte,Ana Paula de F.; Marin,José M.
Mutants of Aspergillus niger N402, induced by UV mutagenesis, were selected and tested for resistance or sensitivity to 5-fluorocytosine. Some mutants showed increased citric acid production, which did not correlate with the intracellular amount of protein or ammonium ion. The resistance to 5-fluorocytosine proved to be a rational approach for isolation of new mutants with improved production of citric acid. The best mutant (FR13) accumulated double the amount of citric acid produced by the parental strain.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aspergillus niger; Citric acid; 5-fluorocytosine.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000100001

Biotechnological production of citric acid
Provedor de dados: 58
Autores: Max,Belén; Salgado,José Manuel; Rodríguez,Noelia; Cortés,Sandra; Converti,Attilio; Domínguez,José Manuel.
This work provides a review about the biotechnological production of citric acid starting from the physicochemical properties and industrial applications, mainly in the food and pharmaceutical sectors. Several factors affecting citric acid fermentation are discussed, including carbon source, nitrogen and phosphate limitations, pH of culture medium, aeration, trace elements and morphology of the fungus. Special attention is paid to the fundamentals of biochemistry and accumulation of citric acid. Technologies employed at industrial scale such as surface or submerged cultures, mainly employing Aspergillus niger, and processes carried out with Yarrowia lipolytica, as well as the technology for recovering the product are also described. Finally, this review...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citric acid; Fermentation; Review; Aspergillus niger.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000400005

The effect of citric acid supplementation on growth performance, phosphorus absorption and retention in rainbow trout (Oncorhynchus mykiss) fed a low-fishmeal diet
Provedor de dados: 118
Autores: Hernández,Adrián J; Satoh,Shuichi; Kiron,Viswanath.
A.J. Hernández, S. Satoh, and V. Kiron. 2013. The effect of citric acid supplementation on growth performance, phosphorus absorption and retention in rainbow trout (Oncorhynchus mykiss) fed a low-fishmeal diet. Cien. Inv. Agr. 40(2): 397-406. Two feeding experiments were conducted to investigate the effect of a low-phosphorus (P) diet in combination with citric acid (CA) on rainbow trout growth performance and P utilization. In the first 12-week trial, duplicate groups of 30 fish (12.0±1.7 g) were fed one of five diets. The basal diet was formulated with low-P protein sources and 15% fishmeal (FM) without inorganic P supplementation. The test diets contained 0.5% monocalcium phosphate (MCP), 3% CA or both. A FM-based diet served as the positive control....
Tipo: Journal article
Palavras-chave: Citric acid; Growth performance; Phosphorus utilization; Rainbow trout.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000200014

Effect of citric acid on the proteolytic activity of Zea mays L.
Provedor de dados: 64
Autores: Martinez-Pacheco,Mauro Manuel; Flores-Garcia,Alberto; Venegas-Gonzalez,Eulalio; Cepeda-Villegas,Mario Alberto.
Hybrids of Zea mays L. (Buffalo, Falcon, H360 y HV313) were treated with citric acid (2000 ppm). Grain yield, soluble protein and proteolytic activity were monitored when the crop reached physiological maturity. Citric acid was applied before the appearance of the flag leaf, and induced an increase in the grain yield from 4222 to 5780 kg/ha, in the soluble protein from 6.34 to 7.91 mg/mg and into the proteolytic activity from 14.3 to 65.7 µU mg prot-1. This is an increase of 2 to 12 times in the Falcon, H360 and HV313 hybrids, while the Buffalo hybrid responded with less intensity to the treatment with citric acid. In the H360 hybrid treated with citric acid, an increase in the proteolytic activity of aspartyl serine proteases was observed. The results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; Citric acid; Proteolytic activity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000500007