scholarly journals Microencapsulation of Camelina sativa Oil Using Selected Soluble Fractions of Dietary Fiber as the Wall Material

Foods ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 681 ◽  
Author(s):  
Kanclerz ◽  
Drozińska ◽  
Kurek
Keyword(s):  
Dietary Fiber ◽  
High Efficiency ◽  
Gum Arabic ◽  
Camelina Sativa ◽  
Core Material ◽  
Wall Material ◽  
The Core ◽  
Wall Materials ◽  
Low Efficiency

The aim of the study was to prove the usefulness of microencapsulation of Camelina sativa oil regarding its vulnerability to oxidation caused by oxygen, temperature, and other factors. Pectin, inulin, gum arabic, and β-glucan, each of them mixed with maltodextrin, were used as wall materials and their appropriability to reduce oxidation of the core material was examined. Microcapsules were prepared by spray drying, which is the most commonly used and very effective method. The research confirmed results known from literature, that gum arabic and inulin are most proper wall materials, because they ensure small oxidation increase during storage (4.59 and 5.92 eq/kg after seven days respectively) and also provide high efficiency of process (83.93% and 91.74%, respectively). Pectin turned out to be the least appropriate polysaccharide because it is not able to assure sufficient protection for the core material, in this case Camelina sativa oil, due to low efficiency (61.36%) and high oxidation (16.11 eq/kg after seven days). β-glucan occurred to be the coating material with relatively high encapsulation efficiency (79.26%) but high humidity (4.97%) which could negatively influence the storage of microcapsules. The use of polysaccharides in microencapsulation, except performing the role of wall material, has the advantage of increasing the amount of dietary fiber in human diet.

scholarly journals Microencapsulation of Lemongrass (Cymbopogon citratus) Essential Oil Via Spray Drying: Effects of Feed Emulsion Parameters

Processes ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 40 ◽  
Author(s):  
Nguyen Phu Thuong Nhan ◽  
Vo Tan Thanh ◽  
Mai Huynh Cang ◽  
Tri Duc Lam ◽  
Nguyen Cam Huong ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Spray Drying ◽  
Gum Arabic ◽  
Core Material ◽  
Wall Material ◽  
Cymbopogon Citratus ◽  
Encapsulation Process ◽  
Wall Materials ◽  
Lemongrass Essential Oil

The purpose of this study was to attempt the encapsulation of lemongrass (Cymbopogon citratus) essential oil utilizing spray drying technique. An array of process parameters including concentration of wall (15–30%), type of wall materials (maltodextrin, maltodextrin and gum Arabic mixture), and concentration of essential oil (0.5–2.0%) were thoroughly investigated. The results show that the use of sole maltodextrin as encapsulant gave microcapsules characteristics comparable to that of powder produced using maltodextrin and gum Arabic mixture. The encapsulation process that was performed with maltodextrin at the concentration of 30% as wall material and lemongrass essential oil at the concentration of 1.5% as core material showed highest drying yield (84.49%), microencapsulation yield (89.31%) and microencapsulation efficiency (84.75%). Encapsulated essential oils retained most of their major constituents in comparison with the bare essential oils without any significant compromise in product quality.

scholarly journals Preparation and Characterization of Double-Layered Microcapsules Containing Nano-SiO2

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Xue Sun ◽  
Jingcheng Su ◽  
Rui Zhang ◽  
Fangyu Fan
Keyword(s):  
Moisture Content ◽  
Droplet Size ◽  
Gum Arabic ◽  
Core Material ◽  
Wall Material ◽  
Scanning Calorimetry ◽  
Nano Sio2 ◽  
The Core ◽  
The Stability

The double-layered microencapsulation technology has been used in many fields. In this study, the double-layered microencapsulated anthocyanin of Passiflora edulis shells (APESs) was prepared via complex coacervation using gelatin and gum Arabic as the first wall materials (single-layered microcapsules (SMs)) and using gum Arabic containing nano-SiO2 as the second wall material (double-layered microcapsules (DMs)/nano-SiO2) to enhance the stability of the core material. Properties of microcapsules were analyzed on the basis of EE, morphology, scanning electron microscopy (SEM), droplet size, moisture content, and differential scanning calorimetry (DSC). The results showed that the EE values of SMs, DMs, and DMs/nano-SiO2 were 96.12%, 97.24%, and 97.85%, respectively. DMs/nano-SiO2 had the lowest moisture content (2.17%). The average droplet size of DMs/nano-SiO2 (34.93 μm) was higher than those of SMs and DMs. DSC indicated that the melting temperature of DMs/nano-SiO2 was 73.61°C and 45.33°C higher than those of SMs and DMs, respectively. SEM demonstrated that DMs/nano-SiO2 had the smoothest surface compared with the other two kinds of microcapsules. The storage stability of APESs and their microcapsules indicated that the stability of the microcapsules was improved by adding DMs/nano-SiO2 into the wall material of microcapsules. These results indicated double-layered microcapsules containing silica nanoparticles contribute to the stability of the core material.

Development of Technologies on Innovative-Simplified Nuclear Power Plant Using High-Efficiency Steam Injector: Part 14—Cooling Characteristics of the Particulate Core Material Debris Accumulated in Horizontal Narrow Gap

2006 ◽  
Author(s):  
Y. Hirao ◽  
G. Su ◽  
K. Sugiyama ◽  
T. Narabayashi ◽  
M. Mori ◽  
...  
Keyword(s):  
Heat Supply ◽  
Nuclear Power ◽  
High Efficiency ◽  
Hot Spot ◽  
Research Work ◽  
Lower Surface ◽  
Injection System ◽  
Core Material ◽  
Metal Debris ◽  
The Core

When LOCA occurs in proposed nuclear reactor systems, the coolability of the core would be kept by the SI core injection system and therefore the probability of the core meltdown is negligible small. In this research work, we make it clear that the coolability of the RPV bottom is secured even if a part of the core should melt and a substantial amount of debris should be deposited on the lower plenum. In this report, we examined experimentally the coolability of the RPV bottom that a Zircaloy-based loose debris layer is deposited on. We set up a heat supply section made by SUS304 on the loose debris layer and measured the heat flux released into the loose debris bed and the temperature at the lower surface of the heat supply section. In addition, we measured the temperature distribution at the bottom of the loose debris bed. It became clear in this study that the coolability depends on the amount of coolant supplied, and the hot spot would not occur when coolant is supplied. Even if a hotspot should occur in the oxidization of loose metal debris accompanied with rapid heat generation. It is found that when a small amount of coolant can be supplied, it disappears because of a high capillary force of oxidized loose debris. So it is confirmed that the soundness of RPV is basically maintained.

scholarly journals Preparation and Optimization of Waterborne Acrylic Core Microcapsules for Waterborne Wood Coatings and Comparison with Epoxy Resin Core

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2366 ◽  
Author(s):  
Xiaoxing Yan ◽  
Yu Tao ◽  
Xingyu Qian
Keyword(s):  
In Situ Polymerization ◽  
Urea Formaldehyde ◽  
Paint Film ◽  
Bath Temperature ◽  
Water Bath ◽  
Core Material ◽  
Wall Material ◽  
Formaldehyde Resin ◽  
The Core ◽  
Resin Core

Microcapsules were prepared by in situ polymerization with urea formaldehyde resin as the wall material and Dulux waterborne acrylic acid as the core material. The effects of the core–wall ratio, water bath temperature and depositing time on the morphology, particle size, yield and encapsulation ratio of microcapsules were investigated by orthogonal experiment of three factors and two levels. The results showed that the core–wall ratio had the greatest influence on the performance of microcapsules. When the core–wall ratio was 0.58:1, the water bath temperature was 70 °C, and the depositing time was 5 d, the microcapsule performance was the best. With the increase in depositing time, the yield of microcapsule particles increased gradually, and the microcapsules appeared to show an adhesive phenomenon. However, the long-term depositing time did not lead to complete deposition and agglomeration of microcapsules. When 10.0% concentration of the waterborne acrylic microcapsules with 0.58:1 of core–wall ratio was added to the coatings, the mechanical and optical properties of the coatings did not decrease significantly, but the elongation at break increased significantly. Therefore, this study offers a new prospect for using waterborne acrylic microcapsules to improve the toughness of waterborne paint film which can be cured at room temperature on a wood surface.

scholarly journals Effect of Dextrose Equivalent on Maltodextrin/Whey Protein Spray-Dried Powder Microcapsules and Dynamic Release of Loaded Flavor during Storage and Powder Rehydration

Foods ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1878
Author(s):  
Kaixin Li ◽  
Bowen Pan ◽  
Lingjun Ma ◽  
Song Miao ◽  
Junfu Ji
Keyword(s):  
Relative Humidity ◽  
Whey Protein ◽  
Food Systems ◽  
Protein Isolate ◽  
Core Material ◽  
Wall Material ◽  
Dextrose Equivalent ◽  
Flavor Release ◽  
Wall Materials ◽  
Spray Dried

The preparation of powdered microcapsules of flavor substances should not only protect these substances from volatilization during storage but also improve their diffusion during use. This study aimed to investigate the effects of maltodextrin (MD) with different dextrose equivalent (DE) values on retention of flavor substances during storage, and the dynamic release of flavor substances during dissolution. MDs with three different DE values and whey protein isolate were mixed in a ratio of 4:1 as wall materials to encapsulate ethyl acetate, and powdered microcapsules were prepared by spray drying. It was proved that MD could reduce the diffusion of flavor substances under different relative humidity conditions through the interaction between core material and wall material. During dissolution, MD released flavor substances quickly owing to its superior solubility. The reconstituted emulsion formed after the powder dissolved in water recaptured flavor substances and made the system reach equilibrium. This study explored the mechanism of flavor release during the storage and dissolution of powder microcapsules and should help us understand the application of powder microcapsules in food systems.

Epstein frame investigation on soft magnetic properties of Fe-based amorphous strips

2021 ◽  
Vol 63 (10) ◽  
pp. 604-609
Author(s):  
Yanxing Xing ◽  
Shaoxiong Zhou ◽  
Wenzhi Chen ◽  
Bangshao Dong ◽  
Yaqiang Dong ◽  
...  
Keyword(s):  
High Efficiency ◽  
Core Loss ◽  
Core Material ◽  
Test Results ◽  
The Core ◽  
Distribution Transformers ◽  
Core Losses ◽  
Power Frequency ◽  
Field Annealing ◽  
Frame Method

Fe-based amorphous strip (AM strip) is a core material for high-efficiency distribution transformers and contributes to saving energy loss in electricity distribution. The core loss and apparent power for 2605SA1 amorphous strips at power frequency are studied using the Epstein frame method. Longitudinal magnetic field annealing and the influence of measuring modes on test results are investigated in detail. Improved test efficiency and higher accuracy in test results for amorphous ribbons are demonstrated and it is found that the number of strips and the lap joint methods affect the test results greatly. The waveform of the secondary induction voltage becomes sinusoidal with the increase of strip number. The values of core loss and apparent power become stable once the total number of strips is larger than 20. The coefficient of eddy current loss (e) also affects the correction of testing core losses. The test results could be improved at a smaller value of e when the waveform of the secondary induction voltage becomes deformed from sinusoidal due to a lower number of strips (below 20). The measured results were found to be reproducible when the strip number of each layer was one or two. However, the core loss and the apparent power increased along with the increase in the number of strips in each layer. Moreover, demagnetisation showed no effects on the test results when using the Epstein frame method.

Nanoparticle@MoS2 Core–Shell Architecture: Role of the Core Material

2018 ◽  
Vol 30 (14) ◽  
pp. 4675-4682 ◽  
Author(s):  
Jennifer G. DiStefano ◽  
Yuan Li ◽  
Hee Joon Jung ◽  
Shiqiang Hao ◽  
Akshay A. Murthy ◽  
...  
Keyword(s):  
Core Material ◽  
Core Shell ◽  
The Core

Role of Aluminide coating degradation on Inconel 713 LC used for Compressor Turbines (CT) of Short-haul Aircrafts

MRS Advances ◽  
2018 ◽  
Vol 3 (38) ◽  
pp. 2281-2296
Author(s):  
Joshua K. Ngoret ◽  
Venkata P. Kommula
Keyword(s):  
Aluminide Coating ◽  
Surface Coatings ◽  
Core Material ◽  
X Ray Diffraction ◽  
Early Failure ◽  
X Ray ◽  
The Core ◽  
Trailing Edges ◽  
Xrf Scanning

ABSTRACTThis paper investigates the role degradation of protective diffusion aluminide coating on Inconel 713LC used for CT blades of short-haul aircraft fleet played in having the blades prematurely retired from service at 6378 hours, as opposed to their pre-set service time of 10000 hours. The blade samples were subjected to various examinations; X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analyse at the; tips, airfoil, as well as the base, transverse and longitudinal, sectioned and unsectioned. As affirmed by both the transverse and longitudinal sections examinations, it was established that thermal attack leading to deterioration of the coating was greater at the tip and airfoils of the blades (the hotter zones) and lesser towards the bases (colder zones). As a result, severe degradation of the core material at the tips and airfoils compared to the bases and more prevalent at the leading edges than trailing edges at the tips. The results further suggest that both active outward Ni diffusion and inward Al diffusion can coexist during exploitation of the blades in service. The study illustrates the role played by the aluminide coating in early failure of CT blades with the aim of bettering the surface coatings and enhancing coating technologies, managing CT blade material monitoring as well as to give insights on advancing CT blades maintenance practices.

Influence of Different Wall Materials on the Microencapsulation of Virgin Coconut Oil by Spray Drying

2015 ◽  
Vol 11 (1) ◽  
pp. 61-69 ◽  
Author(s):  
Yen Yi Hee ◽  
Chin Ping Tan ◽  
Russly Abdul Rahman ◽  
Noranizan Mohd Adzahan ◽  
Wee Ting Lai ◽  
...  
Keyword(s):  
Oxidative Stability ◽  
Spray Drying ◽  
Encapsulation Efficiency ◽  
Coconut Oil ◽  
Gum Arabic ◽  
Sodium Caseinate ◽  
Whey Protein Concentrate ◽  
Wall Material ◽  
Virgin Coconut Oil ◽  
Wall Materials

Abstract The main objective of this study was to evaluate the influence of the different wall material combinations on the microencapsulation of virgin coconut oil (VCO) by spray drying. Maltodextrin (MD) and sodium caseinate (SC) were used as the basic wall materials and mixed with gum Arabic (GA), whey protein concentrate (WPC) and gelatin (G). The stability, viscosity and droplet size of the feed emulsions were measured. MD:SC showed the best encapsulation efficiency (80.51%) and oxidative stability while MD:SC:GA presented the lowest encapsulation efficiency (62.93%) but better oxidative stability than the other two combinations. Microcapsules produced were sphere in shape with no apparent fissures and cracks, low moisture content (2.35–2.85%) and high bulk density (0.23–0.29 g/cm3). All the particles showed relatively low peroxide value (0.34–0.82 meq peroxide/kg of oil) and good oxidative stability during storage. MD:SC:GA microencapsulated VCO had the highest antioxidant activity in both of the 2,2-diphenyl-1-picrylhydrazyl (DPPH) (0.22 mmol butylated hydroxyanisole (BHA)/kg of oil) and 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) assays (1.35 mmol trolox/kg of oil).

scholarly journals Microencapsulation: A potential and promising approach in drug delivery system

2016 ◽  
Vol 1 (1) ◽  
pp. 30-39
Author(s):  
Madiha Jabeen ◽  
Shireen Begum ◽  
Aroosa Siddique ◽  
Syeda Saniya Fatima
Keyword(s):  
Drug Delivery ◽  
Controlled Release ◽  
Drug Delivery System ◽  
Delivery System ◽  
Core Material ◽  
Wall Material ◽  
The Core ◽  
Novel Drug Delivery System ◽  
Reduced Toxicity ◽  
Novel Drug

Novel drug delivery system is a method by which drug delivered can have significant effect on its efficacy. There are several advantages of novel drug delivery system over conventional multi dose therapy, which include improved efficacy, reduced toxicity, improved patient compliance and convenience. Many efforts have been made in developing novel drug delivery system, which emphasizes on controlled and sustained release dosage forms to obtain optimum benefits. There are various approaches in delivering a therapeutic substance to the target site in a sustained controlled release fashion. One such approach is using microspheres or microcapsules. Microencapsulation is a process by which solids, liquids or gases can be enclosed in microscopic particles by forming a thin coating of wall material around substances, which protects it from external environment and control the drug release yielding capsules ranging for one micron to several hundred microns in size (1µ- 800µ). There are different microencapsulation techniques, which are used to obtain microcapsules for controlled release of drug. The morphology of microcapsules depends on the core material and deposition of coating material. Substances may be microencapsulated for the purpose of confining core material within capsule wall for specific period of time. Core materials are also encapsulated so that the core material can be gradually released (controlled release or diffusion) or when external conditions trigger the capsule walls to rupture, melt, or dissolve. Microencapsulation has found many applications in science and technology.

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