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| Registros recuperados: 19 | |
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| Guimarães,Thays Lima Fama; Silva,Larissa Morais Ribeiro da; Lima,Carolline de Brito; Magalhães,Francisco Ernani Alves; Figueiredo,Evânia altina Teixeira de. |
| ABSTRACT To ensure the antimicrobial activity of the aqueous extract of chambá, it is essential to protect its bioactive compounds. The objective was to preserve its characteristics, aiming to provide the food industry with a natural antimicrobial. Three microcapsule formulations made with maltodextrin and cyclodextrin were developed, both including the aqueous extract of chambá leaves dried through lyophilization. The aqueous extract was initially submitted to in vivo toxicity analysis using zebrafish and the microcapsules were characterized through studies of morphology, hygroscopicity, water solubility, particle size, zeta potential, color determination, microencapsulation efficiency and antimicrobial activity. The aqueous extract of chambá was not... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aqueous extraction; Chambá leaves; Microencapsulation; Zebrafish; Microdilution. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000200412 |
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| Ramírez Mella, Mónica. |
| La presente tesis se compone de la Introducción General, Revisión de literatura, tres capítulos que engloban la investigación, objeto de este estudio, y Conclusiones y Recomendaciones Generales. El Capítulo 1 consiste en un artículo de revisión de literatura que enmarca la importancia de proteger ingredientes y/o compuestos del ataque de microrganismos a nivel ruminal, donde la nanotecnología ocupa un papel importante. En el Capítulo 2 se discute el efecto de la vitamina E en la composición de la leche de vacas en pastoreo que recibieron un suplemento de ácido linoleico conjugado microencapsulado, así como un análisis económico del mismo. El Capítulo 3 consiste en el estudio del efecto de la vitamina E en la fermentación ruminal y la digestión de... |
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Palavras-chave: Nanotecnología; Microencapsulación; CLA; Grasa en leche; Vacas en pastoreo; Nanotechnology; Microencapsulation; Fat milk; Grazing dairy cows; Ganadería; Doctorado. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1743 |
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| Hussain,Amjad; Mumtaz,Ahmad Mehmood; Arshad,Muhammad Sohail; Abbas,Nasir; Latif,Abida; Shamim,Rahat; Bukhari,Nadeem Irfan; Hussain,Khalid. |
| ABSTRACT The present study describes the development of theophylline microcapsules by a non-solvent addition method and the effect of plasticizer addition on microencapsulation. The release was studied in distilled water and the data were analysed by various mathematical models for determining the mechanism of release. Prepared microcapsules were found to be spherical, free flowing and having more than 80% entrapped drug. The polymer - cellulose acetate phthalate and plasticizer - polyethylene glycol was considered to be affecting the properties of microcapsules including drug release (time for 50% drug release, T50). The formulation with the highest proportion of polymer and without plasticizer (F3) showed the slowest release with T50 = 4.3 h, while the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Theophylline/microcapsules; Microencapsulation; Cellulose acetate phthalate; Polyethylene glycol; Microcapsules/mechanism of release; Drugs/release.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502016000100004 |
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| Poletto,Gabriela; Fonseca,Bruna de Souza; Raddatz,Greice Carine; Wagner,Roger; Lopes,Eduardo Jacob; Barin,Juliano Smanioto; Flores,Erico Marlon de Moraes; Menezes,Cristiano Ragagnin de. |
| ABSTRACT: The aim of this study was to investigate the influence of the addition of prebiotics rice bran, inulin and hi-maize, on the survival of Lactobacillus acidophilus in alginate microparticles obtained by external ionic gelation followed by freeze-drying. The microparticles size ranged from 127.5μm to 234.6μm. Microparticles added from the different prebiotics demonstrated an increase in the protection of the microorganism, which presented greater viability against the gastrointestinal simulation. As for storage under different conditions, rice bran treatment at 25ºC kept probiotics viable for 30 days. Under storage conditions -18°C and 7°C, treatments containing prebiotics hi-maize and rice bran maintained viable probiotic microorganisms for a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microencapsulation; Probiotics; Rice bran; Inulin; Hi-maize. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000200751 |
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| Silva,Pablo Teixeira da; Fries,Leadir Lucy Martins; Menezes,Cristiano Ragagnin de; Holkem,Augusto Tasch; Schwan,Carla Luisa; Wigmann,Évelin Francine; Bastos,Juliana de Oliveira; Silva,Cristiane de Bona da. |
| Microencapsulation is a process in which active substances are coated by extremely small capsules. It is a new technology that has been used in the cosmetics industry as well as in the pharmaceutical, agrochemical and food industries, being used in flavors, acids, oils, vitamins, microorganisms, among others. The success of this technology is due to the correct choice of the wall material, the core release form and the encapsulation method. Therefore, in this review, some relevant microencapsulation aspects, such as the capsule, wall material, core release forms, encapsulation methods and their use in food technology will be briefly discussed. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microcapsules; Microencapsulation; Controlled release. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000701304 |
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| Etchepare,Mariana de Araújo; Barin,Juliano Smanioto; Cichoski,Alexandre José; Jacob-Lopes,Eduardo; Wagner,Roger; Fries,Leadir Lucy Martins; Menezes,Cristiano Ragagnin de. |
| The consumption of probiotics is constantly growing due to the numerous benefits conferred on the health of consumers. In this context, Microencapsulation is a technology that favors the viability of probiotic cultures in food products, mainly by the properties of protection against adverse environmental conditions and controlled release. Currently there are different procedures for microencapsulation using polymers of various types of natural and synthetic origin. The use of sodium alginate polymers is one of the largest potential application in the encapsulation of probiotics because of their versatility, biocompatibility and toxicity exemption. The aim of this review is to present viable encapsulation techniques of probiotics with alginate, emphasizing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alginate; Controlled release; Microencapsulation; Probiotics.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000701319 |
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| Lima,K.M.; Rodrigues Júnior,J.M.. |
| Successful vaccine application means maximum protection with minimal number of administrations. A rational development of vaccines involves studies of the nature of the antigen as well as of the adjuvant to be used to improve the immune responses. This has provided the impetus for studies to design the degradable devices and for different approaches to antigen delivery by different routes of administration. The development of controlled release systems based on polymeric devices that permit a sustained or pulsed release of encapsulated antigens has attracted much interest. Polymeric delivery systems consist of polymers that release their content continuously in a controlled manner over a period of time. The development of a biocompatible delivery system... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vaccine; Adjuvant; Microspheres; Microencapsulation; Biomaterial. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000200005 |
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| LOPES,SUSIANY; BUENO,LUCIANO; AGUIAR JÚNIOR,FRANCISCO DE; FINKLER,CHRISTINE. |
| ABSTRACT This paper describes the preparation and characterization of alginate beads coated with gelatin and containing Lactobacillus rhamnosus. Capsules were obtained by extrusion method using CaCl2 as cross linker. An experimental design was performed using alginate and gelatin concentrations as the variables investigated, while the response variable was the concentration of viable cells. Beads were characterized in terms of size, morphology, scanning electron microscopy (SEM), moisture content, Fourier Transform Infrared Spectrometry (FTIR), thermal behavior and cell viability during storage. The results showed that the highest concentration of viable cells (4.2 x 109 CFU/g) was obtained for 1 % w/v of alginate and 0.1 % w/v of gelatin. Capsules were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Probiotics; Biopolymers; Functional foods; Microencapsulation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401601 |
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| Silverio,Gabriela Barros; Sakanaka,Lyssa Setsuko; Alvim,Izabela Dutra; Shirai,Marianne Ayumi; Grosso,Carlos Raimundo Ferreira. |
| ABSTRACT: Microencapsulation is used for protection and release of bioactive compounds. Combination of encapsulation methods allows the production of matrices with better technological properties compared to the application of one of the methods alone. Use of ionic gelation produces porous microparticles, and coating it with a protein, by electrostatic interaction, may contribute to a better protection of the active compound. The objective of the research was to produce alginate microparticles (AG) through ionic gelation and to coat them with soluble protein from soy protein concentrate. Two factors were studied, calcium concentration during ionic gelation (0.8, 1.6 and 2.4% w/w) and pH (3.5 and 7.0) of the protein solution for electrostatic interaction.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microencapsulation; Ionic gelation; Electrostatic interaction; Alginate; Soy protein. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001200750 |
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| Fujiwara,Gislene Mari; Campos,Ranieri; Costa,Camila Klocker; Dias,Josiane de Fátima Gaspari; Miguel,Obdulio Gomes; Miguel,Marilis Dallarmi; Marques,Francisco de Assis; Zanin,Sandra Maria Warumby. |
| Stigmasterol - a plant sterol with several pharmacological activities - is susceptible to oxidation when exposed to air, a process enhanced by heat and humidity. In this context, microencapsulation is a way of preventing oxidation, allowing stigmasterol to be incorporated into various pharmaceutical forms while increasing its absorption. Microparticles were obtained using a blend of polymers of sodium alginate, starch and chitosan as the coating material through a one-stage process using the external gelation technique. Resultant microparticles were spherical, averaging 1.4 mm in size. Encapsulation efficiency was 90.42% and method yield 94.87%. The amount of stigmasterol in the oil recovered from microparticles was 9.97 mg/g. This technique proved... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stigmasterol/microencapsulation; Microencapsulation; Sodium alginate/drugs coating; Chitosan/drugs coating; Starch/drugs coating; Natural polymers/drugs coating. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502013000300015 |
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| Registros recuperados: 19 | |
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