Solid Liquid Separation
Mostrando 13-24 de 76 artigos, teses e dissertações.
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13. Determinação do coeficiente de atividade na diluição infinita em sistemas etanol-água-sal por microextração em fase sólida-gc-fid
A new method using the headspace solid phase microextraction (HS-SPME) technique was used to evaluate the infinite dilute activity coefficient (γ1∞) in an alcohol/water/salt system. The studied systems were ethanol and water with NaCl and NH4Cl at salt concentrations of 5, 10, 15, and 30% m/v and temperatures of 303.15 and 313.15 K. The method was used to
Quím. Nova. Publicado em: 2014
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14. Solid-liquid equilibrium data of amoxicillin and hydroxyphenylglycine in aqueous media
The enzymatic synthesis of amoxicillin is catalyzed by Penicillin G Acylase (PGA). As byproducts, hydroxyphenylglycine and alcohol are also formed from hydrolytic reactions and antibiotic synthesis, respectively. The design of this process should be directed to promote the synthesis reaction. At the same time, it is necessary to reduce the hydrolytic reactio
Braz. J. Chem. Eng.. Publicado em: 2013-03
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15. Otimização da separação sólido-líquido em hidrociclones mediante modificações geométricas
Because of advantages such as low cost, simple structure, large capacity of suspension processing and small dimensions, hydrocyclones are widely used for separating dispersed phase (liquid or solids) from continuous one. The shape and size of a hydrocyclone has a decisive effect on the internal flow structure of the continuous phase, and therefore, the separ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/11/2012
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16. Potential of biogas and methane production from anaerobic digestion of poultry slaughterhouse effluent
The objective of this study was to evaluate the efficiency of anaerobic digestion on the treatment of effluent from poultry slaughterhouse. The experiment was conducted at the Laboratory of Waste Recycling from Animal Production/FCA/UFGD. During four weeks, eight experimental digesters, semi-continuous models, were loaded and set according to the hydraulic r
R. Bras. Zootec.. Publicado em: 2012-11
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17. Bioactive extracts and chemical constituents of two endophytic strains of Fusarium oxysporum
Ethyl acetate extracts of cultures grown in liquid Czapek and on solid rice media of the fungal endophyte Fusarium oxysporum SS46 isolated from the medicinal plant Smallanthus sonchifolius (Poepp.) H. Rob., Asteraceae, exhibited considerable cytotoxic activity when tested in vitro against human cancer cells. Chromatographic separation yielded anhydrofusarubi
Rev. bras. farmacogn.. Publicado em: 18/09/2012
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18. Preparation and application of a magnetic composite (Mn3O4/Fe3O4) for removal of As(III) from aqueous solutions
The introduction of magnetic properties in adsorbent materials has the aim of improving solid-liquid separation processes. In this work, a magnetic composite was synthesized through the precipitation of manganese oxide in the presence of magnetite particles using O2 as an oxidant. The composite proved to be chemically and physically stable within a wide rang
Materials Research. Publicado em: 05/04/2012
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19. Determination of fipronil in bovine plasma by solid-phase extraction and liquid chromatography with ultraviolet detection
A fast and efficient method has been developed and validated for the determination of fipronil in bovine plasma. Samples were subjected to solid-phase extraction (SPE) followed by reversed phase liquid chromatography (LC) separation, using acetonitrile/water (60:40 v/v) as the mobile phase with a flow rate of 1.0 mL/min and ultraviolet (UV) detection at 210
Quím. Nova. Publicado em: 2012
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20. Aplicação do método da minimização da energia de Gibbs no cálculo de equilíbrio químico e de fases em sistemas eletrolíticos / Application method of the Gibbs energy minimization to calculation of phase and chemical equilibrium in electrolyte systems
In several industrial applications are used mixtures containing different solutes, often these solutes are non-volatile, such as electrolytes. The phase and chemical equilibrium in these processes occur in the various unit operations. The stages of production, as well as the separation and purification steps are critical to product quality. Thus, the calcula
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2011
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21. Desenvolvimento de um adsorvente contínuo supermacroporoso de troca catiônica para recuperação de lactoferrina de soro de leite / Development of a cation exchange solid supermacroporous adsorbent for lactoferrin recovery from whey
Whey proteins have functional, nutritional and technological properties promoting their use as ingredients and supplements. Sweet whey obtained from Minas Frescal cheese production and concentrated by ultrafiltration was used in the lactoferrin capture in a supermacroporous adsorbent. Supermacroporous monolithic columns have been prepared by radical cryo-cop
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/11/2011
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22. Desenvolvimento de métodos cromatográficos hifenados (in-tube SPME/LC-FLD e GCxGC/qMS) para análises de fármacos e agrotóxicos em amostras complexas / Development of hyphenated chromatographic methods (in-tube SPME/LC-FLD and GCxGC/MS) for analysis of drugs and pesticides in complex samples.
Determination of trace levels of drugs in biological fluids and multiresidue (contaminants) in food samples is extremely important because this generates valuable data for therapeutic drug monitoring (individualization of dosage regimen) and quality control (food safety), respectively. Because of the demand for analytical methods with high resolution and low
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/07/2011
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23. Development of analyrtical methods for determination of N-nitrosamines in shampoo samples by liquid chromatography coupled to diode array, electrochemical and mass spectrometry detecto / Desenvolvimento de métodos para determinação de N-nitrosaminas em amostras de xampu por cromatografia líquida acoplada à detecção por arranjo de diodos, eletroquímica e espectrometria de massas
N-nitrosamines (NA) are N-nitroso compounds, showed to be carcinogenic in a wide variety of experimental animals. In addition, they also present mutagenic and teratogenic activities. N-nitrosamines have been found during the last three decades in a variety of consumer products, including cosmetic and personal care products, and their raw materials. The most
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/02/2011
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24. Formulated products containing a new phytase from Schyzophyllum sp. phytase for application in feed and food processing
A new formulated product containing high yield of phytase from Schizophyllum sp., an important mushroom used for medicinal studies, was developed for application in feed industries and for future use in food processing. The enzyme presented a high activity yield 55.5 U/mL and 6240 U/gds in liquid and solid formulated product, respectively. It showed a good s
Brazilian Archives of Biology and Technology. Publicado em: 2011-12