2006
DOI: 10.1016/j.procbio.2005.08.010
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Production and characterisation of alginate microparticles incorporating Aeromonas hydrophila designed for fish oral vaccination

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Cited by 48 publications
(38 citation statements)
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“…The characteristics of the alginate particle are a result of its size, antigenic composition, the strategy in its production, the choice of alginate and the antigen concentration. For example, the production of microparticles from alginate is generally done by emulsifi cation/gelation, where the alginate emulsion in the presence of the molecule to be encapsulated reacts with calcium ions that promote the piling of G. In this technique, the specifications of the protocol, that is, the viscosity, molecular weight and the concentration of the alginate, stirring times, temperature, gelation agent, the arrangement of its monomers (MM, GG and MG form), type of surfactant, among others, markedly influence the physical-chemical characteristics obtained (Lemoine et al, 1998;Rodrigues et al, 2006). Similarly, molecules are mainly released by diff usion or erosion of the microparticle, which depends on the molecular size of the active agent and the concentration of the alginate, as well as the external environment (Tanaka et al, 1984).…”
Section: Alginatementioning
confidence: 99%
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“…The characteristics of the alginate particle are a result of its size, antigenic composition, the strategy in its production, the choice of alginate and the antigen concentration. For example, the production of microparticles from alginate is generally done by emulsifi cation/gelation, where the alginate emulsion in the presence of the molecule to be encapsulated reacts with calcium ions that promote the piling of G. In this technique, the specifications of the protocol, that is, the viscosity, molecular weight and the concentration of the alginate, stirring times, temperature, gelation agent, the arrangement of its monomers (MM, GG and MG form), type of surfactant, among others, markedly influence the physical-chemical characteristics obtained (Lemoine et al, 1998;Rodrigues et al, 2006). Similarly, molecules are mainly released by diff usion or erosion of the microparticle, which depends on the molecular size of the active agent and the concentration of the alginate, as well as the external environment (Tanaka et al, 1984).…”
Section: Alginatementioning
confidence: 99%
“…One of the characteristics of alginate microparticles that makes them useful for delivering drugs is their resistance to acid pH, which impedes the release of the antigen in the stomach of the fi sh (pH 2-4) and favors their its release in the foregut or hindgut (pH 7 and 8.3, respectively) (Joosten et al, 1997;Leal et al, 2010;Rodrigues et al, 2006;Salinas et al, 2011). Microparticles from 10 to 50 μm can be effi cient for vaccinating, although it has been shown that the smaller the size, the greater the effi ciency of incorporation (Rodrigues et al, 2006;Romalde et al, 2004).…”
Section: Alginatementioning
confidence: 99%
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“…O tamanho das micropartículas está diretamente associado com a concentração e a viscosidade da solução de alginato empregada, observando-se que baixas concentrações favorecem a redução do tamanho das partículas. 12,18,23 Entretanto, concentrações reduzidas diminuem também a resistência mecânica e a estabilidade das micropartículas em condições gastrointestinais. 17 O aumento na proporção de 10 para 50% da fase aquosa aumenta o diâmetro das micropartículas, sendo que partículas menores são obtidas quando esta proporção é fixada em 10%.…”
Section: Introductionunclassified
“…17 O aumento na proporção de 10 para 50% da fase aquosa aumenta o diâmetro das micropartículas, sendo que partículas menores são obtidas quando esta proporção é fixada em 10%. 23 O uso de emulsificantes como o Span 80 também reduz o tamanho das micropartículas, pela diminuição da tensão superficial das gotas, prevenindo sua coalescência. 18 Micropartículas produzidas na presença de altas concentrações de emulsificantes tendem a ser moderadamente deformadas quando comparadas às preparadas empregando-se quantidades menores de surfatantes.…”
Section: Introductionunclassified