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Microencapsulation

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https://www.readbyqxmd.com/read/28805476/microencapsulate-aspergillus-niger-peptidases-from-agroindustrial-waste-wheat-bran-spray-process-evaluation-and-stability
#1
T P F Cabral, N C Bellini, K R Assis, C C C Teixeira, A D Lanchote, H Cabral, L A P de Freitas
The aim of this work was to obtain microencapsulated stable Aspergillus niger peptidases by post fermentation spray drying. The enzymatic extract was evaluated before and after spray drying microencapsulation to verify the effects of five different process parameters on the extract enzymatic activity, i.e. air flow, extract feed rate, drying temperature, homogenizing time and weight ratio of extract to encapsulation material. The optimal conditions were determined by desirability functions and experimentally confirmed...
August 14, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/28805467/protective-microencapsulation-of-%C3%AE-lapachone-using-porous-glass-membrane-technique-based-on-experimental-optimization
#2
Ki Hyun Kim, Tuan-Ho Le, Hee Kyung Oh, Bora Heo, Jeonghyun Moon, Sangmun Shin, Seong Hoon Jeong
Even though β-lapachone is a novel drug with pharmacological activity, it has limitations including instability under light conditions. The main purpose of the study was to enhance the stability of β-lapachone using the microencapsulation method. The Shirasu porous glass membrane was used to achieve uniform-sized microcapsules. The prepared microcapsules were evaluated to investigate how process parameters affect the encapsulation efficiency, photostability, and particle size distribution. The experimental design was conducted to obtain optimal formulations...
August 14, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/28795848/use-of-prebiotic-carbohydrate-as-wall-material-on-lime-essential-oil-microparticles
#3
Pedro Henrique Campelo, Jayne de Abreu Figueiredo, Rosana Zacarias Domingues, Regiane Victória de Barros Fernandes, Diego Alvarenga Botrel, Soraia Vilela Borges
The aim of this work was to study the use of different prebiotic biopolymers in lime essential oil microencapsulation. Whey protein isolate, inulin and oligofructose biopolymers were used. The addition of prebiotic biopolymers reduced emulsion viscosity, althoughit produced larger droplet sizes (0.31-0.32µm). Moisture values (2.94-3.13 g/100 g dry solids) and water activity (0.152-0.185) were satisfactory, being within the appropriate range for powdered food quality.Total oil content, limonene retention values and antioxidant activity of the microparticles containing essential oildecreased in the presence of the carbohydrates...
August 10, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/28776395/electrokinetic-potential-stabilization-by-bile-acid-microencapsulating-formulation-of-pancreatic-%C3%AE-cells-cultured-in-high-ratio-poly-l-ornithine-gel-hydrogel-colloidal-dispersion-applications-in-cell-biomaterials-tissue-engineering-and-biotechnological-applications
#4
Armin Mooranian, Rebecca Negrulj, Ryu Takechi, Emma Jamieson, Grant Morahan, Hani Al-Salami
INTRODUCTION: Current trials for β-cell transplantation have been hindered by poor cell viability and function post-transplantation. Recently, electric charges of the microencapsulating formulation carrying β-cells have shown significant effects on cell survival and function. Thus, this study aimed at investigating the effects of electric charge, of novel colloidal formulation containing β-cells, on cell viability, biological activity and insulin release. METHODS: A new formulation, containing high ratios of poly-L-ornithine, suspending electrical-stimulation hydrogel and polystyrene sulphone (1:1:0...
August 4, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28774144/micromechanical-properties-of-a-new-polymeric-microcapsule-for-self-healing-cementitious-materials
#5
Leyang Lv, Erik Schlangen, Zhengxian Yang, Feng Xing
Self-healing cementitious materials containing a microencapsulated healing agent are appealing due to their great application potential in improving the serviceability and durability of concrete structures. In this study, poly(phenol-formaldehyde) (PF) microcapsules that aim to provide a self-healing function for cementitious materials were prepared by an in situ polymerization reaction. Size gradation of the synthesized microcapsules was achieved through a series of sieving processes. The shell thickness and the diameter of single microcapsules was accurately measured under environmental scanning electron microscopy (ESEM)...
December 20, 2016: Materials
https://www.readbyqxmd.com/read/28774052/evaluating-and-modeling-the-internal-diffusion-behaviors-of-microencapsulated-rejuvenator-in-aged-bitumen-by-ftir-atr-tests
#6
Junfeng Su, Yingyuan Wang, Peng Yang, Shan Han, Ningxu Han, Wei Li
Microencapsulated rejuvenator has been attracted much attention for self-healing bitumen. The diffusion coefficient is one of the key parameters to estimate the feasibility of rejuvenator to age bitumen. The objective of this research was to evaluate diffusion behaviors of microencapsulated rejuvenator in aged bitumen by a FTIR-ATR method. Various microcapsule samples were mixed in bitumen to form thin films. The core material of microcapsules used as rejuvenator was diphenylsilane (DPS), its fairly specific absorption band at 843 cm(-1) was selected as a marker band to calculate the diffusion coefficient (D)...
November 17, 2016: Materials
https://www.readbyqxmd.com/read/28773225/influence-of-microencapsulated-phase-change-material-pcm-addition-on-micro-mechanical-properties-of-cement-paste
#7
Branko Šavija, Hongzhi Zhang, Erik Schlangen
Excessive cracking can be a serious durability problem for reinforced concrete structures. In recent years, addition of microencapsulated phase change materials (PCMs) to concrete has been proposed as a possible solution to crack formation related to temperature gradients. However, the addition of PCM microcapsules to cementitious materials can have some drawbacks, mainly related to strength reduction. In this work, a range of experimental techniques has been used to characterize the microcapsules and their effect on properties of composite cement pastes...
July 27, 2017: Materials
https://www.readbyqxmd.com/read/28772728/research-advances-of-microencapsulation-and-its-prospects-in-the-petroleum-industry
#8
REVIEW
Miaomiao Hu, Jintang Guo, Yongjin Yu, Lei Cao, Yang Xu
Additives in the petroleum industry have helped form an efficient system in the past few decades. Nowadays, the development of oil and gas has been facing more adverse conditions, and smart response microcapsules with the abilities of self-healing, and delayed and targeted release are introduced to eliminate obstacles for further exploration in the petroleum industry. However, limited information is available, only that of field measurement data, and not mechanism theory and structural innovation data. Thus we propose that the basic type, preparation, as well as mechanism of microcapsules partly depend on other mature fields...
March 31, 2017: Materials
https://www.readbyqxmd.com/read/28770494/cell-microencapsulation-in-polyethylene-glycol-hydrogel-microspheres-using-electrohydrodynamic-spraying
#9
Mozhdeh Imaninezhad, Era Jain, Silviya Petrova Zustiak
Microencapsulation of cells is beneficial for various biomedical applications, such as tissue regeneration and cell delivery. While a variety of techniques can be used to produce microspheres, electrohydrodynamic spraying (EHS) has shown promising results for the fabrication of cell-laden hydrogel microspheres in a wide range of sizes and in a relatively high-throughput manner. Here we describe an EHS technique for the fabrication of cell-laden polyethylene glycol (PEG) microspheres. We utilize mild hydrogel gelation chemistry and a combination of EHS parameters to allow for cell microencapsulation with high efficiency and viability...
August 3, 2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28766752/unlocking-opportunities-in-food-design-for-infants-children-and-the-elderly-understanding-milestones-in-chewing-and-swallowing-across-the-lifespan-for-new-innovations
#10
REVIEW
Julie A Y Cichero
Intake of a variety of foods increases the likelihood of good general health. From as early as life in utero, humans are exposed to flavor. Further flavor imprinting occurs via breast milk, increasing the likelihood of acceptance of a variety flavors when solids are introduced. While first foods need to be smooth and runny, experience managing soft lumps is required for rudimentary development of chewing skills. Texture experiences are critical to providing building blocks for food acceptance and gradual increase in the range of food textures eaten...
August 2017: Journal of Texture Studies
https://www.readbyqxmd.com/read/28766116/sardine-oil-loaded-vanillic-acid-grafted-chitosan-microparticles-a-new-functional-food-ingredient-attenuates-myocardial-oxidative-stress-and-apoptosis-in-cardiomyoblast-cell-lines-h9c2
#11
K V Vishnu, K K Ajeesh Kumar, Niladri S Chatterjee, R G K Lekshmi, P R Sreerekha, Suseela Mathew, C N Ravishankar
Fish oil has been widely recognized as an excellent dietary source of polyunsaturated n-3 fatty acids such as EPA and DHA. However, it can undergo oxidation easily resulting in the formation of toxic off flavor compounds such as hydroperoxides. These compounds adversely affect the nutritional quality and may induce several stress reactions in body. To solve this problem, a new antioxidant bio-material, vanillic acid-grafted chitosan (Va-g-Ch), was synthesized and used as a wall material for microencapsulation of fish oil...
August 2, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28742341/synthesis-strategies-to-extend-the-variety-of-alginate-based-hybrid-hydrogels-for-cell-microencapsulation
#12
Solène Passemard, Luca Szabó, François Noverraz, Elisa Montanari, Carmen Gonelle-Gispert, Léo Bühler, Christine Wandrey, Sandrine Gerber-Lemaire
The production of hydrogel microspheres (MS) for cell immobilization, maintaining the favorable properties of alginate gels but presenting enhanced performance in terms of in vivo durability and physical properties, is desirable to extend the therapeutic potential of cell transplantation. A novel type of hydrogel MS was produced by straightforward functionalization of sodium alginate (Na-alg) with heterotelechelic poly(ethylene glycol) (PEG) derivatives equipped with either end thiol or 1,2-dithiolane moieties...
July 25, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28720929/antioxidant-characteristics-of-extracts-of-hibiscus-sabdariffa-calyces-encapsulated-with-mesquite-gum
#13
C E Ochoa-Velasco, C Salazar-González, S Cid-Ortega, J A Guerrero-Beltrán
This study compared the stability of extracts of H. sabdariffa calyces microencapsulated with different concentrations of mesquite gum during storage. Dry Roselle calyces were mixed with 50:50 (v/v) ethanol:water solution to obtain 18°Bx concentrate. This Roselle extract concentrate was mixed with purified mesquite gum (100:1-100:5 v/w). The Roselle extract concentrate-gum (RECG) was spray dried at inlet and outlet temperatures of 180 ± 2 and 104 ± 2.3 °C, respectively, at an air flow rate of 38 m(3)/h...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28718920/microcapsules-biologically-prepared-using-perilla-frutescens-l-britt-essential-oil-and-their-use-for-extension-of-fruit-shelf-life
#14
Na Li, Zhi-Jun Zhang, Xiao-Jun Li, Hui-Zhen Li, Li-Xia Cui, Dong-Liang He
BACKGROUND: Perilla EO possess high antioxidant, antimicrobial and insecticidal activities, and have proven to be more reliable than chemically synthesized food preservatives. Nevertheless, EOs have disadvantages of facile photo-degradation and oxidation which limits their use in agriculture and food industries. Microencapsulation technology that generates a polymeric coating surrounding EOs could overcome these disadvantages. RESUILS: The EO concentration had a significant effect on encapsulation efficiency (EE) and loading capacity (LC)...
July 18, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28715926/microencapsulation-of-anthocyanin-rich-black-soybean-coat-extract-by-spray-drying-using-maltodextrin-gum-arabic-and-skimmed-milk-powder
#15
Ana Kalušević, Steva Lević, Bojan Čalija, Milena Pantić, Miona Belović, Vladimir Pavlović, Branko Bugarski, Jela Milić, Slađana Žilić, Viktor Nedović
Black soybean coat is insufficiently valorised food production waste rich in anthocyanins. The goal of the study was to examine physicochemical properties of spray dried extract of black soybean coat in regard to carrier materials: maltodextrin, gum Arabic, and skimmed milk powder. Maltodextrin and gum Arabic-based microparticles were spherical and non-porous while skimmed milk powder-based were irregularly shaped. Low water activity of microparticles (0.31-0.33), good powders characteristics, high solubility (80...
August 2, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/28696506/preparation-of-acid-resistant-microcapsules-with-shell-matrix-structure-to-enhance-stability-of-streptococcus-thermophilus-iffi-6038
#16
Huan Bin Zhou, Jiashu Chen, Shunyi Li, Jianpan Zhang, Chun E Zhu, Hao Ran, Meihua Luo, Xin Pan, Haiyan Hu, Chuanbin Wu
Microencapsulation is an effective technology used to protect probiotics against harsh conditions. Extrusion is a commonly used microencapsulation method utilized to prepare probiotics microcapsules that is regarded as economical and simple to operate. This research aims to prepare acid-resistant probiotic microcapsules with high viability after freeze-drying and optimized storage stability. Streptococcus thermophilus IFFI 6038 (IFFI 6038) cells were mixed with trehalose and alginate to fabricate microcapsules using extrusion...
July 11, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28692873/evaluation-of-microencapsulation-of-the-ufv-areg1-bacteriophage-in-alginate-ca-microcapsules-using-microfluidic-devices
#17
Delaine M G Boggione, Laís S Batalha, Marco T P Gontijo, Maryoris E S Lopez, Alvaro V N C Teixeira, Igor J B Santos, Regina C S Mendonça
The indiscriminate use of antibiotics and the emergence of resistant microorganisms have become a major challenge for the food industry. The purpose of this work was to microencapsulate the bacteriophage UFV-AREG1 in a calcium alginate matrix using microfluidic devices and to study the viability and efficiency of retention. The microcapsules were added to gel of propylene glycol for use as an antimicrobial in the food industry. The technique showed the number of the phage encapsulation, yielding drops with an average 100-250μm of diameter, 82...
June 28, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28687392/characterization-and-in-vitro-anticancer-properties-of-chitosan-microencapsulated-flavan-3-ols-rich-grape-seed-extracts
#18
Michelangelo Iannone, Rosario Mare, Donatella Paolino, Agnese Gagliardi, Francesca Froiio, Donato Cosco, Massimo Fresta
Studies have fully demonstrated that a diet rich in fruit and vegetables may reduce the incidence of tumors. In particular, Grape Seed Extract (GSE) has been shown to carry on chemopreventive and antitumor activity thanks to the numerous beneficial substances it contains. The purpose of this work was to create a biocompatible matrix containing GSE in order to obtain microparticles able to modulate its biopharmaceutical parameters. The spray-drying technique was chosen in order to realize chitosan microparticles characterized by a mean diameter of 4-10μm and a positive surface charge that decreased after GSE encapsulation...
July 4, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28687035/effect-of-eudragit-s100-nanoparticles-and-alginate-chitosan-encapsulation-on-the-viability-of-lactobacillus-acidophilus-and-lactobacillus-rhamnosus
#19
Fereshteh Ansari, Hadi Pourjafar, Vahid Jodat, Javad Sahebi, Amir Ataei
In this study, we examined a novel method of microencapsulation with calcium alginate-chitosan and Eudragit S100 nanoparticles for the improving viability of probiotic bacteria, Lactobacillus acidophilus and Lactobacillus rhamnosus. Extrusion technique was carried out in microencapsulation process. The viability of two probiotics in single coated beads (with only chitosan), double coated beads (with chitosan and Eudragit nanoparticles), and as free cells (unencapsulated) were conducted in simulated gastric juice (pH 1...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28686292/microencapsulation-of-borage-oil-with-blends-of-milk-protein-%C3%AE-glucan-and-maltodextrin-through-spray-drying-physicochemical-characteristics-and-stability-of-the-microcapsules
#20
Ru-Yi Li, Yan Shi
BACKGROUND: Borage oil is a rich commercial source of gamma-linolenic acid (GLA, 18:3n-6). However, borage oil is rich in omega-6 polyunsaturated fatty acids and vulnerable to oxidation. Thus, selecting of appropriate wall materials is critical to the encapsulation of borage oil. This study investigated the influence of wall materials on the physicochemical characteristics and stability of microencapsulated borage oil by spray drying. Blends of milk protein [sodium caseinate (CAS) or whey protein concentrate (WPC)], β-glucan (GLU) and maltodextrin (MD) were used as the wall materials for encapsulating borage oil...
July 7, 2017: Journal of the Science of Food and Agriculture
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