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Film-Forming Systems in Topically Administered Pharmaceutical Formulations

Materials Sciences and Applications 2020年第8期11卷 576-590页

作者： Flora Ferreira Duarte de Oliveira livia rodrigues de menezes Maria Inês Bruno Tavares Eloisa Mano Macromolecules Institute Federal University of Rio de Janeiro CT Bloco J Cidade Universitária Ilha do Fund&atilde o Rio de Janeiro Brazil

The skin is the most extensive and outermost organ in the body and can be greatly exploited both from the point of view of alternative routes of systemic drug delivery and treatment of dermatological diseases. Because of its main function as a barrier against harmful external agents, it also becomes a barrier to drug administration, but there are strategies to reduce this limitation of this promising route of administration. The development of polymer-based film-forming formulations is extensively studied for this purpose, since the formation of a film on the skin increases the contact time of the drug, for this being characterized as a controlled release reservoir system. There are a multitude of possible polymers to compose these formulations and their choice must be made according to the purpose of each application. This work, therefore, aims to study the state of the art of film forming systems for topical application of pharmaceutical formulations.

关键词： Film-Forming Systems Polymeric Formulations Topical Drug delivery

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Biotechnological Potential of Endophytic Bacteria to Improve the Micropropagated Seedling of Variety RB92579 Sugarcane(Saccharum officinarum L.)

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Advances in Microbiology 2018年第11期8卷 859-873页

作者： Maria do Carmo Silva Barreto Márcia do Vale Barreto Figueiredo Márcia Vanusa da Silva Arnóbio Gon?alves de Andrade José de Paula de Oliveira Clébia Maria Alves Almeida livia Caroline Alexandre de Araújo Odemar Vicente dos Reis Junior Manoel Urbano Ferreira Junior Antonio Félix da Costa Vera Lucia de menezes Lima departamento de Bioquímica Centro de Biociências Universidade Federal de Pernambuco Recife Brazil Laboratório de Biologia do Solo Instituto Agron&#244 mico de Pernambuco Recife Brazil departamento de Química Universidade Federal Rural de Pernambuco Recife Brazil Centro de Tecnologias Estratégicas do Nordeste Recife Brazil

Endophytic bacteria may influence agricultural production in several ways, including promoting plant growth. Two experiments were conducted in order to evaluate the combination of endophytic bacteria from the Brazilian Northeast region aims at the commercial introduction of the inoculation of these bacteria in micropropagated sugarcane plants using a temporary immersion bioreactor. One experiment was done in tubes with sterile commercial substrate, and the other was done in pots with soil;both were installed in a greenhouse. A mixed inoculation was performed in six inoculated endophytic diazotrophic bacteria in micropropagated sugarcane plants, variety RB92579. In the experiment with soil, the mixed inoculation significantly increased the shoot dry matter of plants without the addition of nitrogen fertilizer. However, the accumulation of total-N in the tissues showed no significant differences between treatments with and without nitrogen fertilization. The evaluation of micropropagated seedlings showed no increases in the parameters tested. The results showed that the response of inoculation in temporary immersion bioreactor micropropagation is possible, and that the application of homologous strains may have contributed to a better response by the interaction of endophytic bacteria with sugarcane RB92579. Further studies should be conducted to improve the methodology, which indicates a great potential to optimize this process on a commercial scale.

关键词： Biological Nitrogen Fixation Meristem Culture Diazotrophic Bacteria Endophytes Micropropagation

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