Consulta: subjectFacets:"Microencapsulation"
Registros recuperados: 19
Data/hora: 11/06/2024 00:47:58

Efecto de la vitamina E en la función digestiva y composición de la leche de bovinos alimentados con un suplemento de ácido linoleico conjugado protegido.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: 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...
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

Beta-carotene: Beta-carotene microencapsulation process.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: MENDONCA, S.
Optimized microencapsulation process of beta-carotene extract by spray drying technique to enable the addition of beta-carotene in hydrophilic systems (food and pharmaceutical preparations) and to provide greater stability during processing and storage.
Tipo: Folders
Palavras-chave: Beta-carotene; Microencapsulation; Hydrophilic interactions; Renewable resources.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1133090

Assembly of HE800 exopolysaccharide produced by a deep-sea hydrothermal bacterium into microgels for protein delivery applications
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zykwinska, Agata; Marquis, Melanie; Sinquin, Corinne; Cuenot, Stephane; Colliec-jouault, Sylvia.
Assembly of biopolymers into microgels is an elegant strategy for bioencapsulation with various potential biomedical applications. Such biocompatible and biodegradable microassemblies are developed not only to protect the encapsulated molecule but also to ensure its sustained local delivery. The present study describes the fabrication of microassemblies from a marine HE800 exopolysaccharide (EPS), which displays a glycosaminoglycan (GAG)-like structure and biological properties. HE800 EPS was assembled, through physical cross-linking with divalent ions, into microgel particles and microfibers using microfluidics. The microparticle morphology was highly affected by the polysaccharide concentration and its molecular weight. A model protein, namely Bovine...
Tipo: Text
Palavras-chave: Marine exopolysaccharide; Microgel particles; Microfibers; Microfluidic; Microencapsulation; Protein release.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00311/42175/41475.pdf

Polymer-based encapsulation of Bacillus subtilis and its effect on Meloidogyne incognita in tomato
Provedor de dados: Phyton: Revista Internacional de Botánica Experimental
Autores: Pacheco-Aguirre,J; Ruiz-Sánchez,E; Reyes-Ramírez,A; Cristóbal-Alejo,J; Tun-Suárez,J; Borges-Gómez,L.
Antagonistic bacteria used as biological control agent may loss effectiveness at the field due to environmental factors such as UV radiation, dryness and high temperature. An inexpensive alternative to protect antagonistic bacteria against such factors is the use of microencapsulating agents. In this work, the effect of microencapsulation of Bacillus subtilis with commercial gums on their antagonistic capacity against Meloidogyne incognita was evaluated. The eficiency of the microencapsulation was verified by the difference between the initial and final concentrations of protein release. The effectiveness as antagonist was evaluated against M. incognita in tomato under greenhouse conditions. The microcapsules based on carboxymethylcellulose (MBC) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhizobacteria; Plant pathogenic nematode; Ionic gelation; Microencapsulation.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000100002

Antimicrobial activity of microcapsules with aqueous extract of chambá (Justicia pectoralis Jacq)
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: 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

Efficacy of microencapsulated nucleopolyhedroviruses from Colombia as biological insecticides against Spodoptera frugiperda (Lepidoptera: Noctuidae)
Provedor de dados: Acta Agronómica
Autores: Barrera-Cubillos,Gloria Patricia; Gómez-Valderrama,Juliana Andrea; Rivero,Laura Fernanda Villamizar.
Abstract: Wettable powder formulations by microencapsulation of viral occlusion bodies (OBs) of both Spodoptera frugiperda multiple nucleopolyhedrovirus from Colombia (SfCOL) and a genotypic variant (SfCOL-A) were evaluated for controlling the fall armyworm S. frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) in maize crops. Microencapsulation preserved OBs activity after three months of storage at 35ºC, where insecticidal activity loss was not greater than 12%. Additionally, the formulation protected the OBs against inactivation caused by UV-B radiation, retaining its insecticidal activity after 6 hours of UV laboratory exposure, in contrast to unformulated viral suspensions, which presented an Original Activity Remaining (OAR) between 12.1 and 50%. Under...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microencapsulation; Baculovirus; Spodoptera frugiperda; Biological control; Maize.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000200267

Preparation and characterization of alginate and gelatin microcapsules containing Lactobacillus rhamnosus
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: 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

Microencapsulation of a Colombian Spodoptera frugiperdaNucleopolyhedrovirus with Eudragit® S100 by spray drying
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Camacho Kurmen,Judith Elena; Gómez Alvarez,Martha Isabel; Villamizar Rivero,Laura Fernanda.
A Colombian Spodoptera frugiperda nucleopolyhedrovirus NPV003 with high potential for the development of an efficient biopesticide was microencapsulated by spray drying with a pH dependent polymer (Eudragit® S100). Conditions for microparticles production were standardized and microencapsulation process was validated. Physical properties, insecticide activity and photo-stability of microencapsulated virus were determined. The microparticles were spherical and irregular shaped, with sizes between 17.64 and 19.47 µm. Moisture content was 10.38 ± 0.87%; encapsulation efficiency 84.61± 13.09% and process yield was 91.20 ± 6.40%. Microencapsulation process did not affect viral insecticidal activity and provided efficient protection against UVB radiation....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Baculovirus; Microencapsulation; Spray drying; Eudragit® S100; Photostability.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000300468

Characterization and shelf life of β-carotene loaded solid lipid microparticles produced with stearic acid and sunflower oil
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Gomes,Graziela Veiga de Lara; Borrin,Thais Ribeiro; Cardoso,Lisandro Pavie; Souto,Eliana; Pinho,Samantha Cristina de.
Solid lipid microparticles were tested as microencapsulation systems for protecting β-carotene from degradation. Blends of long-chain (C18) solid lipids (70% stearic acid) and sunflower oil (30%) were used to produce lipid microparticles encapsulating the carotenoid. Polysorbate 80 (4%) was employed to stabilize the stearic acid microparticles. The concentration of β-carotene was monitored using spectrophotometry, the particle size distribution was measured by laser diffraction, the crystal structure was determined by wide angle X-ray diffraction (WAXD), and the thermal behaviour was characterized by differential scanning calorimetry (DSC) over a period of seven months. All of the systems had an average particle size smaller than 5 µm. To avoid β-carotene...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solid lipid microparticles; Β-carotene; Microencapsulation.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000400017

Poly-DL-lactide-co-glycolide microspheres as a controlled release antigen delivery system
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: 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

Effect of cellulose acetate phthalate and polyethylene glycol on physical properties and release of theophylline from microcapsules
Provedor de dados: Brazilian Journal of Pharmaceutical Sciences
Autores: 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

Production and characterization of alginate-starch-chitosan microparticles containing stigmasterol through the external ionic gelation technique
Provedor de dados: Brazilian Journal of Pharmaceutical Sciences
Autores: 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

Alginate-pomegranate peels' polyphenols beads: effects of formulation parameters on loading efficiency
Provedor de dados: Brazilian Journal of Pharmaceutical Sciences
Autores: Zam,Wissam; Bashour,Ghada; Abdelwahed,Wassim; Khayata,Warid.
Calcium alginate beads containing pomegranate peels' polyphenol extract were encapsulated by ionic gelation method. The effects of various formulation factors (sodium alginate concentration, calcium chloride concentration, calcium chloride exposure time, gelling bath time maintaining, and extract concentration) on the efficiency of extract loading were investigated. The formulation containing an extract of 1 g pomegranate peels in 100 mL distilled water encapsulated with 3 % of sodium alginate cured in 0.05 M calcium chloride for 20 minutes and kept in a gelling bath for 15 minutes was chosen as the best formula regarding the loading efficiency. These optimized conditions allowed the encapsulation of 43.90% of total extracted polyphenols and 46.34 % of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pomegranate/polyphenols/microencapsulation; Calcium alginate beads/microencapsulation; Microencapsulation; Polyphenols; Natural antioxidants/microencapsulation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502014000400741

Microencapsulation: concepts, mechanisms, methods and some applications in food technology
Provedor de dados: Ciência Rural
Autores: 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

Encapsulation of Lactobacillus acidophilus and different prebiotic agents by external ionic gelation followed by freeze-drying
Provedor de dados: Ciência Rural
Autores: 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

Cross-linked coacervates of cashew gum and gelatin in the encapsulation of pequi oil
Provedor de dados: Ciência Rural
Autores: Alexandre,Joana de Barros; Barroso,Tiago Linhares Cruz Tabosa; Oliveira,Marília de Albuquerque; Mendes,Francisco Rogênio da Silva; Costa,José Maria Correia da; Moreira,Renato de Azevedo; Furtado,Roselayne Ferro.
ABSTRACT:  Pequi oil is rich in bioactive compounds which can be encapsulated to increase protection against extrinsic environmental factors. A delayed degradation of pequi oil may occur by using microencapsulation technology, in addition to masking unpleasant flavors and aromas. Complex coacervation is a technique based on the electrostatic interaction between two oppositely charged biopolymers which form a matrix complexed around an agent of interest. However, cross-linking the particles is often necessary in order to make them more rigid. The objective of this research was to produce and characterize pequi oil microparticles in a cashew gum (CG) and gelatin (GE) matrix cross-linked with tannic acid. Cross-linked pequi oil microparticles were produced by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microencapsulation; Complex coacervation; Cross-linking; Tannic acid; Encapsulation efficiency.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001200753

Development, characterization and viability study of probiotic microcapsules produced by complex coacervation followed by freeze-drying
Provedor de dados: Ciência Rural
Autores: Silva,Thaiane Marques da; Barin,Juliano Smanioto; Lopes,Eduardo Jacob; Cichoski,Alexandre José; Flores,Erico Marlon de Moraes; Silva,Cristiane de Bona da; Menezes,Cristiano Ragagnin de.
ABSTRACT:  Technique of complex coacervation was used to produce microcapsules of Lactobacillus acidophilus La-5 encapsulated in gelatin and gum arabic which were then freeze-drying. Microcapsules were characterized using scanning electron and optical microscopy, and resistance of probiotics was evaluated during release into a simulated gastrointestinal tract and storage at different temperatures. The complex coacervation process produced microcapsules with a high encapsulation efficiency (77.60% and 87.53%), ranging from 127.14-227.05 μm with uniform distribution. Microencapsulation was an efficient approach to achieve significant protection of probiotics against simulated gastrointestinal conditions compared with free cells. Encapsulation also improved...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microencapsulation; Lactobacillus acidophilus; Gelatin; Gum Arabic.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000700752

Microencapsulation of probiotics using sodium alginate
Provedor de dados: Ciência Rural
Autores: 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

Production and characterization of alginate microparticles obtained by ionic gelation and electrostatic adsorption of concentrated soy protein
Provedor de dados: Ciência Rural
Autores: 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