Microcapsule Formulations Research Articles

The effect of improved formulation of chitosan-alginate microcapsules of Bifidobacteria on serum lipid profiles in mice

BackgroundProbiotics have been associated with many beneficial effects in human digestive physiology. The aim of this study was to evaluate the effect of improved formulation of chitosan-alginate microcapsules of Bifidobacterium strains on serum triglycerides, cholesterol, HDL, and LDL in mice. MethodsFive approved probiotic strains of Bifidobacterium were tested for anti-proliferative effect and interleukin-8 induction on HT-29 cell lines. Bifidobacterium strains plus five approved Lactobacillus were encapsulated in chitosan-alginate microcapsules and tested for its survival in simulated gastrointestinal conditions. These microcapsules were administered to 4 groups of mice (including 1. Bif (Bifidobacterium strains), 2. Lac (Lactobacillus strains), 3. Bif-Lac (Bifidobacterium plus Lactobacillus strains) and 4. Control) for 8 days. At eighth day, the blood of mice were taken and serum levels of triglycerides, cholesterol, HDL, and LDL of them were determined. ResultsAll of the Bifidobacterium strains significantly (P < 0.001) reduced secretion of IL-8 in HT-29 cells as well as maximum antiproliferative effects (P < 0.001). In addition, all microcapsules showed impressive survival rate in bile (>%94.1) and gastrointestinal (>%78.28) conditions (P < 0.05). Only Bif-Lac group displayed significantly lower serum cholesterol and LDL levels than control group (P < 0.05). Besides, all groups indicate statistically significant weight loss of mice during the 8 days in comparison with the control group (P < 0.05). ConclusionThe results of this study showed that the microencapsulated probiotics with alginate and chitosan had an effective mean of delivery of viable bacterial cells and non-pharmacological interventions use to reduce serum cholesterol and LDL levels in in-vivo condition.

Obtaining, Evaluation, and Optimization of Doxycycline-Loaded Microparticles Intended for the Local Treatment of Infectious Arthritis

Compared to the classical systemic administration, the local drug release has some advantages, such as lack of systemic toxicity and associated side effects, increased patient compliance, and a low rate of bacterial resistance. Biopolymers are widely used to design sustained drug delivery systems and biomaterials for tissue engineering. Type II collagen is the indispensable component in articular cartilage and plays a critical role in the growth and proliferation process of chondrocytes. Thus, type II collagen has drawn more attention and interest in the treatment and research of the cartilage regeneration. The aim of this study was to obtain, characterize, and optimize the microcapsules formulation based on type II collagen, sodium alginate, and sodium carboxymethyl cellulose loaded with doxycycline as an antibiotic model drug that could be incorporated further in hydrogels to improve the localized therapy of septic arthritis. The new synthesized microcapsules were assessed by spectral (FT-IR), morphological (optical microscopy), and biological analysis (enzymatic biodegradation, antimicrobial activity). The size distribution of the obtained microcapsules was determined using optical microscopy. The drug encapsulation efficiency was also determined. To optimize the microcapsules’ composition, some physical-chemical and biological analyses were subjected to an optimization technique based on experimental design, response surface methodology, and the Taguchi technique, and the adequate formulations were selected. The results obtained recommend these new microcapsules as promising drug systems to be further incorporated in type II collagen hydrogels used for septic arthritis.

KAJIAN PUSTAKA FORMULASI DAN EVALUASI MIKROKAPSUL SALUT ENTERIK MENGGUNAKAN ACRYL-EZE® &amp; SURETERIC DENGAN METODE PENGGABUNGAN MIKROENKAPSULASI DENGAN EKSTRUSI-SFERONISASI

Microcapsules were prepared by means of microencapsulation modified by the extrusion-spheronization method. The extrusion-spheronization method is used to cover the shortcomings of the microencapsulation method. The results showed that Acryl-eze and Sureterik can be used in coatings in producing microcapsules. The results of research evaluating the formulation of enteric acetosal coated microcapsules have not resulted in delayed release system that is in accordance with monographic requirements and dissolution profile testing has not shown the elimination stage. The results of the evaluation of the delayed release release system enteric coated microcapsule formulation met the requirements of monograph and dissolution profile test results, except for F3 in buffering conditions. The purpose of this literature review is to examine the enteric-coated microcapsule formulation using Acryl-eze® &amp; Sureteric by combining microencapsulation and spheronization extrusion methods.

Oral Administration of Fucosylated Chondroitin Sulfate Oligomers in Gastro-Resistant Microcapsules Exhibits a Safe Antithrombotic Activity.

Fucosylated chondroitin sulfate (FCS) polysaccharide isolated from sea cucumber has potent anticoagulant activity. Based on its resistance to the enzymes present in vertebrates, it may serve as an anticoagulant and shows antithrombotic effects when delivered through gastro-resistant (GR) tablets. However, due to the multiple plasma targets of FCS polysaccharide in the coagulation pathway, bleeding can occur after its oral administration. In the current study, we used FCS oligomers, in particular a mixture of oligosaccharides having 6 to 18 saccharide units, as the active ingredient in GR microcapsules for oral anticoagulation. In a Caco-2 model, the FCS oligomers showed higher absorption than native FCS polysaccharides. Oral administration of FCS oligomer-GR microcapsules provided a dose-dependent, prolonged anticoagulant effect with a selective inhibition of the intrinsic coagulation pathway when compared with subcutaneous administration of FCS oligomers or oral administration of unformulated FCS oligomers or native FCS-GR microspheres. Continued oral administration of FCS oligomer-GR microcapsules did not result in the accumulation of oligosaccharides in the plasma. Venous thrombosis animal models demonstrated that FCS oligomers delivered via GR microcapsules produced a potent antithrombotic effect dependent on their anticoagulant properties in the plasma, while oral administration of unformulated FCS oligomers at the same dose exhibited a weaker antithrombotic effect than the formulated version. Oral administration of FCS oligomer-GR microcapsules resulted in no bleeding, while oral administration of native FCS-GR microcapsules resulted in bleeding (p < 0.05). Our present results suggest that a FCS oligomer-GR microcapsule formulation represents an effective and safe oral anticoagulant for potential clinical applications.

Processed cheese with inulin and microencapsulated chia oil (Salvia hispanica)

A processed cheese using Grana Padano and Mozzarella cheese shavings with the addition of microencapsulated chia oil and inulin was studied. After the study of microencapsulation of chia oil, 4 processed cheeses were formulated and chemically, microbiologically and sensorially analyzed. The efficiency of microencapsulation of chia oil using ionic gelation was 94.4% with the 3:1 oil:alginate ratio, with a low solubility in water (0.04%) and a particle size of ~195 μm. The formulation with inulin had a 36% fat reduction, with no sensorial differences compared to the standard formulation. Microencapsulation was able to mask the oil taste when compared to the formulation of inulin and microcapsules of chia oil and the formulation of inulin and free-chia oil. The use of Grana Padano, inulin and encapsulated chia oil gave a product with reduced fat content and high acceptability.

Microencapsulation of immunoglobulin Y: optimization with response surface morphology and controlled release during simulated gastrointestinal digestion.

Immunoglobulin Y (IgY) is an effective orally administered antibody used to protect against various intestinal pathogens, but which cannot tolerate the acidic gastric environment. In this study, IgY was microencapsulated by alginate (ALG) and coated with chitooligosaccharide (COS). A response surface methodology was used to optimize the formulation, and a simulated gastrointestinal (GI) digestion (SGID) system to evaluate the controlled release of microencapsulated IgY. The microcapsule formulation was optimized as an ALG concentration of 1.56% (15.6 g/L), COS level of 0.61% (6.1 g/L), and IgY/ALG ratio of 62.44% (mass ratio). The microcapsules prepared following this formulation had an encapsulation efficiency of 65.19%, a loading capacity of 33.75%, and an average particle size of 588.75 μm. Under this optimum formulation, the coating of COS provided a less porous and more continuous microstructure by filling the cracks on the surface, and thus the GI release rate of encapsulated IgY was significantly reduced. The release of encapsulated IgY during simulated gastric and intestinal digestion well fitted the zero-order and first-order kinetics functions, respectively. The microcapsule also allowed the IgY to retain 84.37% immune-activity after 4 h simulated GI digestion, significantly higher than that for unprotected IgY (5.33%). This approach could provide an efficient way to preserve IgY and improve its performance in the GI tract.

Development and optimization of spray-dried functional oil microcapsules: Oxidation stability and release kinetics.

This study aimed to optimize the microencapsulation method for a functional oil using high amylose corn starch (HACS) and assessed its structure and antioxidant capacity. The results showed that the optimal microencapsulation condition is achieved by using 28.5% of functional oil, 15.75% of HACS, and 57.86% of proportion of monoglyceride in emulsifier with 94.86% microencapsulation efficiency. Scanning electron microscopy and particle size measurement showed that the functional oil microcapsules were uniform size, smooth surface, spherical shape, and without cracks in the wall of the capsules. In vitro oil release of microencapsulates results showed that microencapsulated functional oil containing HACS has a better sustained release effect. The microcapsules containing HACS exhibited a lower lipid oxidation rate during storage. In conclusion, microencapsulation of HACS as wall material improved the stability of functional oil and this formulation of microcapsules was satisfactorily applied in powdered food for diabetic patients.

Formulation of polyphthalaldehyde microcapsules for immediate UV-light triggered release

Triggered release from responsive drug reservoirs activated by remote stimuli is desired in a range of fields. Critical bottlenecks are cost-efficient formulation avenues applicable for industrial scale-up, viable triggers and immediate release rather than continuous release upon activation. UV-sensitive microcapsules based on self-immolating polymers in combination with thin shells and morphological weak spots should allow for immediate triggered release. Polyphthalaldehyde-based microcapsules were prepared using several variations of the internal phase separation route. In addition, a fluorescence microscopy method was developed to study both the microcapsule morphology and the triggered release in-situ. The microcapsule formation was driven by the surface activity of the stabilizer, effectively lowering the high polymer-water interfacial tension, which is in sharp contrast to conventional encapsulation systems. Contrary to previous findings, a core–shell morphology was obtained via slow emulsion-to-suspension transformation. Rapid transformation captured intermediate inverted core–shell structures. The capsules were highly sensitive to both acid- and UV-mediated triggers, leading to an unzipping and rupturing of the shell that released the core content. Poly(methacrylic acid)-stabilized microcapsules displayed immediate UV-triggered release provided by their stimuli-sensitive blueberry morphology. Both capsules in aqueous and dry environment started to lose their core content after less than one minute of UV light exposure.

Stabilization of Chinese Gallnut (Galla Chinensis) Tannins by Spray-Drying Microencapsulation for Natural Hair Coloring

Chinese gallnut (Galla chinensis) is rich in hydrolyzable tannins, which, when mordanted with ferrous ions, produces intense black color on keratinous fiber and makes it a desirable natural hair dye in Asian countries. However, extracted tannins from Chinese gallnut are susceptible to chemical degradation by physicochemical factors (heat, UV, and high pH) that limited the utilization and commercialization of this plant colorant in color cosmetics. Hence, this study was aimed to improve the storage and application stability of Chinese gallnut extract by spray-drying microencapsulation. Different combinations of maltodextrin (MD) and gum arabic (GA) were used as encapsulating agents and the effects on the encapsulation efficiency, morphology, physicochemical properties, in vitro toxicity, and stability were investigated. The results showed that an increase of MD proportions in the wall matrix resulted in the production of more spherical shaped particles with larger size, decreased bulk density, and improved solubility in water. Furthermore, microcapsules covered with MD alone showed the maximum stability with respect to heat, UV, and formulation at alkaline pH. When applied for dyeing of human gray hairs, intense black color could be achieved by using the MD-covered microcapsule formulations and the dyeings are stable to multiple washings and simulated sunlight. Therefore, this study examines a promising strategy for stabilizing tannin-rich extract from Chinese gallnut while maintaining its dyeing efficiency, which will in turn promote its utilization in hair coloring cosmetics.

In silico molecular docking of Vetiver oil and formulation of Vetiver oil-Encapsulated gellan gum-based Microcapsules for Antidepressant activity

In the present work, in view of the medicinal properties of vetiver oil (extracted from the roots of Vetiveria zizanioides L.), we made an attempt to predict the possible activity of khusinol, khusimol, germacrene D, junipene, γ-muurolene, biclovetivenol, viridiflorene, β-vetispirene, β-vetivenene, and β-caryophyllene with two cannabinoid receptors, CB1 and CB2 (responsible for antidepressant action) via the in silico molecular docking in a way to encapsulate vetiver oil in different gellan gum-based microcapsules for antidepressant activity. The results of the docking analyses demonstrated that khusinol, germacrene D, and γ-muurolene were docked in the CB1 and CB2 receptors, indicating that the vetiver oil-encapsulated formulation could be effective for antidepressant action. Vetiver oil-encapsulated gellan gum-based microcapsules were prepared using gellan gum only, gellan gum-sodium alginate blends and gellan gum-karaya gum blends via the o/w emulsificationionotropic crosslinking gelation methodology using aqueous solutions of calcium chloride (4%). The vetiver oil encapsulation within these microcapsules was calculated and found to be ranged in-between 29.61 ± 3.18% and 52.69 ± 3.31%. The in vitro releases of encapsulated vetiver oil gellan gum-based microcapsules were found to be sustained over 8 h. Vetiver oil-encapsulated gellan gum-alginate microcapsules (F5) was selected as best formulation, which exhibited highest oil encapsulation (52.69 ± 3.31%) and more sustained in vitro releasing of vetiver oil (72.15 ± 3.27%) than other vetiver oil-encapsulated microcapsules formulations. The mean diameter of the F5 microcapsules was measured 650 μm. The in vivo antidepressant activity of F5 microcapsules was evaluated by forced swimming test and tail suspension test in the Swiss albino mice. The results have shown significant antidepressant activity of vetiver oil-encapsulated gellan gum-alginate microcapsules (F5).

Co-delivery of chlorantraniliprole and avermectin with a polylactide microcapsule formulation.

Improving drug utilization of water-based pesticide formulations is facile and feasible to efficiently avoid serious pesticide residues and reduce the resulting environmental pollution. A co-delivery system of two- or multi-pesticides within one formulation could enhance drug efficiency and decrease usage amounts of pesticides due to the synergistic effect of the loaded multiple pesticides. Herein, we reported a porous polylactide (PLA) microcapsule formulation for co-delivery of avermectin (Av) and chlorantraniliprole (CAP). A double emulsion method combined with premix membrane emulsion (PME) was adopted to produce the Av/CAP-loaded porous microcapsules (Av/CAP P-MCs) with prolonged drug release, high loading content and entrapment efficiency, as well as good light and thermal stability. Compared with single Av- or CAP-loaded microcapsule formulations, the Av/CAP P-MCs exhibited higher biotoxicity against Plutella xylostella. These results reveal that the Av/CAP co-delivery system may be a promising candidate to be further explored as a facile, effective and environmentally-friendly pesticide formulation.

Antimicrobial activity of microcapsules with aqueous extract of chambá (Justicia pectoralis Jacq)

To ensure the antimicrobial activity of the aqueous extract of chamba, 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 chamba 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 chamba was not considered to be toxic. The microcapsules had irregular shapes, with sizes varying from 0.58 to 1.15 μm. Solubility values ranged from 74.69 to 76.8% and hygroscopicity varied from 2.07 to 4.34%. Additionally, it obtained efficient encapsulation of the phenolic compounds, showing antimicrobial activity against Staphylococcus aureus, Listeria monocytogenes, Salmonella Enteritidis and Escherichia coli, with its use being an alternative as a natural antimicrobial agent.

Chitosan Encapsulation of FerrateVI for Controlled Release to Water:Mechanistic Insights and Degradation of Organic Contaminant

Tetraoxy-anion of iron in +6 oxidation state (FeVIO42−, FeVI), commonly called ferrate, has shown tremendous potential as a green oxidative agent for decontaminating water and air. Encapsulation of solid potassium salt of ferrate (K2FeO4) circumvents the inherent drawbacks of the instability of ferrate under humid conditions. In the encapsulated strategy, controlled release without exposing the solid ferrate to the humid environment avoids self-decomposition of the oxidant by water in the air, and the ferrate is mostly used to decontaminate water efficiently. This study demonstrated the formulation of oxidative microcapsules with natural materials present in chitosan, whose release rate of the core material can be controlled by the type of intermediate hydrocarbon layer and the pH-dependent swelling of chitosan shell. The pH played a pivotal role in swelling chitosan shell and releasing the core oxidant. In a strong acidic solution, chitosan tended to swell quickly and release FeVI at a faster rate than under neutral conditions. Additionally, among the several long-chain hydrocarbon compounds, oleic acid exhibited the strongest “locking” effect when applied as the intermediate layer, giving rise to the slow release of FeVI. Coconut oil and mineral oil, in comparison, allowed FeVI to penetrate the layer within shorter lengths of time and showed comparable degrees of degradation of target contaminant, methylene orange, under ambient temperature and near-neutral conditions. These findings have practical ramifications for remediating environmental and industrial processes.

Encapsulation of 2-amino-2-methyl-1-propanol with tetraethyl orthosilicate for CO2 capture

Carbon capture is widely recognised as an essential strategy to meet global goals for climate protection. Although various CO2 capture technologies including absorption, adsorption and membrane exist, they are not yet mature for post-combustion power plants mainly due to high energy penalty. Hence researchers are concentrating on developing non-aqueous solvents like ionic liquids, CO2-binding organic liquids, nanoparticle hybrid materials and microencapsulated sorbents to minimize the energy consumption for carbon capture. This research aims to develop a novel and efficient approach by encapsulating sorbents to capture CO2 in a cold environment. The conventional emulsion technique was selected for the microcapsule formulation by using 2-amino-2-methyl-1-propanol (AMP) as the core sorbent and silicon dioxide as the shell. This paper reports the findings on the formulated microcapsules including key formulation parameters, microstructure, size distribution and thermal cycling stability. Furthermore, the effects of microcapsule quality and absorption temperature on the CO2 loading capacity of the microcapsules were investigated using a self-developed pressure decay method. The preliminary results have shown that the AMP microcapsules are promising to replace conventional sorbents.

DEVELOPMENTOF READY-MADECLOTHING PRODUCTS WITH ROSEMARY OIL TO USE IN AROMATHERAPY

In this study, rosemary oil was obtained from Rosmarinus officinalis L. by water vapor distillation method. Microcapsules were formed in different shell and core ratio using gelatin, gum arabic and ethyl cellulose was employed as shell. Morphological features of the obtained microparticles were examined by scanning electron microscopy (SEM). The bonding structures of microparticles were investigated by using Fourier transformed infrared (FT-IR) spectrometry and thermogravimetric analysis and differential thermal analysis system (DT/TGA). The selected microcapsule formulation was transferred to the fabrics used in sports and leisure garments according to the exhaustion method. The fabrics were examined by SEM for the presence of capsules on the fabrics

A potential technological application of probiotic microcapsules in lactose-free Greek-style yoghurt

The potential of lactose-free Greek-style yoghurt as a new matrix for incorporation of spray-dried microcapsules containing the probiotic Bifidobacterium lactis BB-12 was evaluated. Three different microcapsule formulations were produced using gum arabic, inulin and maltodextrin as wall materials. All formulations showed encapsulation yield above 96% and good probiotic viability (>8 log cfu g−1) throughout 30 days of storage (4 °C). Microcapsules produced with gum arabic and inulin showed the best physical properties (lowest moisture, solubility and hygroscopicity values, and highest bulk and tapped densities), and thus were selected to be added to the yoghurt. Addition of the microcapsules increased the product's pH, firmness and adhesiveness; however, it did not affect the viability of the starter cultures. After 30 days of storage, probiotic viability was above 6.5 log cfu g−1, indicating that lactose-free Greek-style yoghurt may be an appropriate matrix for B. lactis BB-12.

Mikroenkapsulasi Likopen dari Buah Tomat dengan Metode Penguapan Pelarut

Lycopene is a carotenoid group easily damaged due to the oxidation process (light, oxygen and temperature) and isomerization during storage. This damage can be minimized by microencapsulation processes. The objective of this study was to develop novel microencapsulation of lycopene extracts from tomato fruit by solvent evaporation method using ethyl cellulose as wall materials and to select the optimum formulation. Three microcapsule formulations were prepared containing the ratio of lycopene and ethyl cellulose (L:ES) of 1:1, 1:2 and 1:3. The morphology of the microcapsules was analysed by optical microscopy and scanning electronic microscopy. The encapsulation efficiency, particle size, recovery yield and moisture content were also examined. The result showed that all microcapsule formula were aggregated and irregular in shape with encapsulation efficiency of 6.13- 19.43%, moisture content of 1,63- 7,52%, recovery yield of 81-98,12% and particle size of 46,2-86µm. Microcapsule with a ratio 1:3 (L:ES) was the most optimum formula based on a maximum encapsulation efficiency than the others

Noninvasive Monitoring of Allogeneic Stem Cell Delivery with Dual-Modality Imaging-Visible Microcapsules in a Rabbit Model of Peripheral Arterial Disease.

Stem cell therapies, although promising for treating peripheral arterial disease (PAD), often suffer from low engraftment rates and the inability to confirm the delivery success and track cell distribution and engraftment. Stem cell microencapsulation combined with imaging contrast agents may provide a means to simultaneously enhance cell survival and enable cell tracking with noninvasive imaging. Here, we have evaluated a novel MRI- and X-ray-visible microcapsule formulation for allogeneic mesenchymal stem cell (MSC) delivery and tracking in a large animal model. Bone marrow-derived MSCs from male New Zealand White rabbits were encapsulated using a modified cell encapsulation method to incorporate a dual-modality imaging contrast agent, perfluorooctyl bromide (PFOB). PFOB microcapsules (PFOBCaps) were then transplanted into the medial thigh of normal or PAD female rabbits. In vitro MSC viability remained high (79 ± 5% at 4 weeks of postencapsulation), and as few as two and ten PFOBCaps could be detected in phantoms using clinical C-arm CT and 19F MRI, respectively. Successful injections of PFOBCaps in the medial thigh of normal (n = 15) and PAD (n = 16) rabbits were demonstrated on C-arm CT at 1-14 days of postinjection. Using 19F MRI, transplanted PFOBCaps were clearly identified as “hot spots” and showed one-to-one correspondence to the radiopacities on C-arm CT. Concordance of 19F MRI and C-arm CT locations of PFOBCaps with postmortem locations was high (95%). Immunohistological analysis revealed high MSC survival in PFOBCaps (>56%) two weeks after transplantation while naked MSCs were no longer viable beyond three days after delivery. These findings demonstrate that PFOBCaps could maintain cell viability even in the ischemic tissue and provide a means to monitor cell delivery and track engraftment using clinical noninvasive imaging systems.

MICROENCAPSULATION OF GRAPE SEED OIL (VITIS VINIFERA L.) WITH GUM ARABIC AS A COATING POLYMER BY CROSSLINKING EMULSIFICATION METHOD

Objective: Grape seed oil (GSO) from Vitis vinifera L. is a liquid vegetable oil which has been used mainly for its linoleic acid content. However, there are many efforts to convert the liquid form of the oil into a solid form due to the instability under storage condition. The aim of this study was to convert GSO into the solid microcapsules by emulsion crosslinking method with gum arabic as a coating polymer.Methods: The GSO was formulated with gum arabic in the ratios of 1:2, 1:3, 1:4, and 1:5. Gum arabic solution was emulsified with GSO using Span 80 and glutaraldehyde. The emulsion was dropped into a beaker glass of isopropyl alcohol to form microcapsules. The microcapsules were dried at 70 °C. Then, they were characterized in terms of morphology, particle size, swelling index, water content, and entrapment efficiency.Results: The produced microcapsules of GSO showed white yellowish color and spherical shape. The particle size of F1, F2, F3 and F4 microcapsules were 69 μm, 82 μm, 125 μm, and 131 μm, respectively. The water content of the F1–F4 ranged from 4.37±0.34 to 5.70±0.92% and swelling indexes were ranged from 5.54±0.01 to 5.94±0.04. The value of entrapment efficiency of F1, F2, F3, and F4 were 17.33±0.603, 20.73±0.678, 34.22±1.195, and 67.15±2.019%, respectively.Conclusion: The results of this investigation showed that GSO could be converted into the solid spherical microcapsules by emulsion crosslinking method using gum arabic. Taken together, this study has provided the most promising formulation of GSO microcapsules for further production in pharmaceutical industry.

Mikroenkapsulasi Fikosianin dalam Maltodekstrin-Alginat: Formulasi dan Karakterisasi

Phycocyanin is a source of natural blue dye which can be extracted from Spirulina sp. The main characteristics of phycocyanin are unstable by temperature and pH during processing and storage. Microencapsulation methods could be proposed to protect the phycocyanin from the external effect, where the types and concentration of encapsulant used may affect the characteristics of the result. The aim of this study was to determine the best formulation and characterization of phycocyanin microcapsules from Spirulina sp. with maltodextrin and alginate as an encapsulant. The microcapsules were produced using five different concentrations of alginate in maltodextrin, namely 0%; 0.2%; 0.4%; 0.6%; and 0.8% (w/w). The total encapsulant used was 10% of phycocyanin microparticle solution. The results showed that the increasing concentration of alginate could raise the levels of phycocyanin, moisture content, encapsulation efficiency, bulk density, blue intensity, and particle size, it also improved the morphology of the microcapsules. Phycocyanin microcapsules with alginate concentration of 0.6% and 9.4% maltodextrin had the highest phycocyanin content, encapsulation efficiency, and blue intensity.