scholarly journals Mikroenkapsulasi Fikosianin dalam Maltodekstrin-Alginat: Formulasi dan Karakterisasi

2018 ◽  
Vol 38 (1) ◽  
pp. 23 ◽  
Author(s):  
Retno Ayu Kurniasih ◽  
Lukita Purnamayati ◽  
Ulfah Amalia ◽  
Eko Nurcahya Dewi
Keyword(s):  
Particle Size ◽  
Moisture Content ◽  
Encapsulation Efficiency ◽  
Blue Dye ◽  
External Effect ◽  
Alginate Concentration ◽  
Processing And Storage ◽  
And Storage ◽  
Blue Intensity

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.

scholarly journals Wheat Grinding Process with Low Moisture Content: A New Approach for Wholemeal Flour Production

Processes ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 32
Author(s):  
Waleed H. Hassoon ◽  
Dariusz Dziki ◽  
Antoni Miś ◽  
Beata Biernacka
Keyword(s):  
Particle Size ◽  
Moisture Content ◽  
Average Particle Size ◽  
Average Particle ◽  
Grinding Process ◽  
Mixing Properties ◽  
New Approach ◽  
Grain Moisture ◽  
Flour Production ◽  
And Storage

The objective of this study was to determine the grinding characteristics of wheat with a low moisture content. Two kinds of wheat—soft spelt wheat and hard Khorasan wheat—were dried at 45 °C to reduce the moisture content from 12% to 5% (wet basis). Air drying at 45 °C and storage in a climatic chamber (45 °C, 10% relative humidity) were the methods used for grain dehydration. The grinding process was carried out using a knife mill. After grinding, the particle size distribution, average particle size and grinding energy indices were determined. In addition, the dough mixing properties of wholemeal flour dough were studied using a farinograph. It was observed that decreasing the moisture content in wheat grains from 12% to 5% made the grinding process more effective. As a result, the average particle size of the ground material was decreased. This effect was found in both soft and hard wheat. Importantly, lowering the grain moisture led to about a twofold decrease in the required grinding energy. Moreover, the flour obtained from the dried grains showed higher water absorption and higher dough stability during mixing. However, the method of grain dehydration had little or no effect on the results of the grinding process or dough properties.

scholarly journals Morphology, Stability, and Application of Lycopene Microcapsules Produced by Complex Coacervation

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Glaucia A. Rocha-Selmi ◽  
Carmen S. Favaro-Trindade ◽  
Carlos R. F. Grosso
Keyword(s):  
Encapsulation Efficiency ◽  
Gum Arabic ◽  
Average Diameter ◽  
Stability Test ◽  
Free Form ◽  
Complex Coacervation ◽  
The Stability ◽  
Processing And Storage ◽  
High Degree ◽  
And Storage

The interest in lycopene has increased in recent years due to studies that associate it with the reduction in risk of developing cardiovascular diseases and cancer. However, due to its high degree of unsaturation, this carotenoid is inclined to isomerize and oxidize during processing and storage, making it difficult to use in the food industry. Microencapsulation can improve this situation, increasing its stability and making incorporation into food formulations possible. Thus, the aim of this study was to microencapsulate lycopene by complex coacervation using gelatin and gum Arabic as the encapsulating agents. The microcapsules were evaluated based on the encapsulation efficiency and their morphology and then submitted to a stability test and applied in cake making. Most of the systems studied presented spherical microcapsules with defined walls. The encapsulation efficiency values were above 90%, and the average diameter of the capsules ranged from 61 to 144 μm. The stability test showed that microencapsulation offered greater protection to the lycopene as compared to its free form. The application of nonfreeze dried coacervated microcapsules in cake making was satisfactory, but the color transference was low when freezedried coacervated microcapsules were used.

EFFECT OF PROCESSING AND STORAGE ON THE QUALITY OF GELOSE FROM IRISH MOSS (CHONDRUS CRISPUS)

1948 ◽  
Vol 26f (3) ◽  
pp. 160-167
Author(s):  
D. MacDougall
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
East Coast ◽  
Storage Temperature ◽  
Chondrus Crispus ◽  
Irish Moss ◽  
Optimum Ph ◽  
Processing And Storage ◽  
And Storage

Irish moss (Chondrus crispus) from Canada's east coast was used to study possible improvements in the production and storage of gelose. The optimum pH for the extraction of gelose from Irish moss was between 6 and 7. Fine leaf particles, which prevent rapid filtration, were readily removed by supercentrifuging. Comparison of drum drying and drying from the frozen state showed that the former caused a marked lowering of viscosity but had little effect on suspending power or jelly strength. The logarithm of the viscosity determined by means of a MacMichael viscosimeter was related directly to the concentration; therefore, viscosity measurements can be corrected for the moisture content of the samples. The effect of storage temperature on deterioration was greater than the effect of relative humidity. Samples stored at 0° and 40° F. for 12 weeks showed no significant changes in viscosity or suspending power, whereas those stored at 80° and 120° F. deteriorated very rapidly. Material was vacuum ice-dried to 2% moisture without damage but the quality decreased when the extracts were stored at high temperatures.

Characterization of Hypericum perforatum L. (St. John’s wort) macerates prepared with different fatty oils upon processing and storage

2017 ◽  
Vol 20 ◽  
pp. 470-480 ◽  
Author(s):  
Miriam Heinrich ◽  
Veronika Vikuk ◽  
Rolf Daniels ◽  
Florian C. Stintzing ◽  
Dietmar R. Kammerer
Keyword(s):  
Hypericum Perforatum ◽  
St John’S Wort ◽  
St John's Wort ◽  
Hypericum Perforatum L ◽  
Processing And Storage ◽  
And Storage

scholarly journals Preparation and Characterization of Citrus Aurantifolia Lime Oils Microcapsules by Complex Coacervation Technique

2021 ◽  
Vol 71 (12) ◽  
pp. 146-155
Author(s):  
Euis Julaeha ◽  
Mohamad Nurzaman ◽  
Diana Rakhmawaty Eddy ◽  
Dikdik Kurnia ◽  
Sandra Puspita ◽  
...  
Keyword(s):  
Particle Size ◽  
Encapsulation Efficiency ◽  
Oil Content ◽  
Core Shell ◽  
Complex Coacervation ◽  
Citrus Aurantifolia ◽  
Particle Size Analyzer ◽  
Ratio Speed ◽  
Improved Performance

The Lime oil of Citrus aurantifolia was microencapsulated by coacervation technique employing gelatine and alginates as the shells, and calcium chloride as cross linker. Optimization of core/shell ratio, speed and temperature of stirring was carried out. Structure and shape of the microcapsules were characterized by particle size analyzer (PSA) and scanning electron microscope (SEM) respectively. The properties of microcapsules such as, yield, particle size distribution, oil content, oil load, and encapsulation efficiency were also determined. Upon condition of ratio core/shell 0.49, speed and temperature of stirring at 600 rpm and 35 �C respectively, the microcapsules of LOs with improved performance were achieved with efficiency of 46% and oil content of 78%.

scholarly journals MOISTURE AND ACIDITY AS INDICATORS OF THE QUALITY OF HONEY ORIGINATING FROM VOJVODINA REGION

2015 ◽  
Vol 7 (2) ◽  
pp. 99-109 ◽  
Author(s):  
Nadežda Prica ◽  
Milica Živkov Baloš ◽  
Sandra Jakšić ◽  
Željko Mihaljev ◽  
Brankica Kartalović ◽  
...  
Keyword(s):  
Moisture Content ◽  
Storage Conditions ◽  
Physicochemical Analysis ◽  
Yeast Fermentation ◽  
The Stability ◽  
Processing And Storage ◽  
And Storage ◽  
Alcohol Formation ◽  
Positive Quality

The color, aroma and fl avor are major sensory characteristics of honey, which are mainly determined by the botanical origin of honey as well as by processing and storage conditions. Increased moisture content above the maximum permitted level could result in honey spoilage, which aff ects its sensory properties. The higher water-in-honey content, the greater possibility of yeast fermentation and thus the change of the fl avor and color ofhoney. Fermentation process results in alcohol formation and, in the presence of oxygen, the alcohol will break down to acetic acid and water, which causes honey to have sour taste. Thus, moisture content of honey is a critical parameter for its quality as it aff ects the stability of honey and its resistance to microbial spoilage during storage. Physicochemical analysis of moisture content and acidity of honey play an important role in determining the overall characteristic of honey and final assessment of its quality. In this study, the investigation of aforementioned parameters resulted in positive quality assessment for 48 of 50 examined honey samples produced in 2013 in the territory of Vojvodina.

scholarly journals Purification and Partial Characterization of Melanoidins Fractions from Toasted Oak Heartwood, Comparison with Melanoidins from Roasted Coffee

2018 ◽  
Vol 7 (6) ◽  
pp. 37 ◽  
Author(s):  
M. F. Nonier ◽  
N. Vivas ◽  
N. Vivas de Gaulejac ◽  
C. Mouche ◽  
C. Rossy Huguet ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Degradation Products ◽  
Partial Characterization ◽  
Maillard Reaction Products ◽  
Reaction Products ◽  
Roasted Coffee ◽  
Oak Wood ◽  
Processing And Storage ◽  
And Storage

During the cooking, processing, and storage of food products, a whole range of browning reactions occurs, initiated by the reaction of a carbohydrate with a compound possessing a free amino group. Melanoidins formed, influence food quality, mainly their colour, their flavour, and their antioxidant activities. Melanoidins are complex Maillard reaction products. We developed a method to isolate coffee melanoidins and melanoidins from toasted oak wood. We noted that coffee is richer in melanoidin compounds than oak wood. We presented a partial characterization of melanoidins fractions from toasted oak heartwood, and a comparison with melanoidins from roasted coffee. Mass spectra of the fractions isolated from toasted oak wood indicate the presence of pentose and hexose-based oligosaccharides with different degrees of polymerisation. The presence of the oligosaccharide moieties, as well as their degradation products found in the oak wood melanoidins, supports the postulated carbohydrate-based origin of melanoidins.

Experience in Upgrading of Novi Han Repository

2001 ◽  
Author(s):  
Ira G. Stefanova ◽  
Mayia D. Mateeva
Keyword(s):  
Safety Assessment ◽  
Nuclear Energy ◽  
Nuclear Research ◽  
Radionuclide Inventory ◽  
Processing And Storage ◽  
Storage Structures ◽  
And Storage ◽  
Nuclear Applications ◽  
Selection Of

Abstract Novi Han Repository is the only existing repository in Bulgaria for the disposal of radioactive waste from nuclear applications in industry, medicine and research. The repository was constructed in the early sixties according to the existing requirements. It was operated by the Institute for Nuclear Research and Nuclear Energy for more than thirty years without any accident or release of radioactivity to the environment, but without any investment for upgrading. As a consequence, the Bulgarian Nuclear Safety Authority temporarily stopped the operation of the repository in 1994. The measures for upgrading Novi Han Repository, supported by the IAEA with TC Project BUL/4/005 “Increasing Safety of Novi Han Repository”, are presented in this paper. They consist of: assessment of radionuclide inventory and future waste arisings, characterization of disposal vaults, characterization of the site, safety assessment, upgrading of the monitoring system, option study for the selection of treatment and conditioning processes and the development of a conceptual design for low and intermediate level waste processing and storage facility, immediate measures for improvement of the existing disposal vaults and infrastructure, and construction of above-ground temporary storage structures. The outstanding activities for re-opening of the Novi Han Repository and implementation of the measures for reconstruction of the Novi Han Repository are discussed.

scholarly journals Characterization of Salmonella Phage LPST153 That Effectively Targets Most Prevalent Salmonella Serovars

2020 ◽  
Vol 8 (7) ◽  
pp. 1089 ◽  
Author(s):  
Md. Sharifull Islam ◽  
Yang Hu ◽  
Md. Furkanur Rahaman Mizan ◽  
Ting Yan ◽  
Ishatur Nime ◽  
...  
Keyword(s):  
Morphological Analysis ◽  
Salmonella Enterica Serovar Typhimurium ◽  
Burst Size ◽  
Lytic Phage ◽  
Serovar Typhimurium ◽  
Processing And Storage ◽  
And Storage ◽  
Salmonella Control ◽  
Salmonella Phage

Foodborne diseases represent a major risk to public health worldwide. In this study, LPST153, a novel Salmonella lytic phage with halo (indicative of potential depolymerase activity) was isolated by employing Salmonella enterica serovar Typhimurium ATCC 13311 as the host and had excellent lytic potential against Salmonella. LPST153 is effectively able to lyse most prevalent tested serotypes of Salmonella, including S. Typhimurium, S. Enteritidis, S. Pullorum and S. Gallinarum. Morphological analysis revealed that phage LPST153 belongs to Podoviridae family and Caudovirales order and could completely prevent host bacterial growth within 9 h at multiplicity of infection (MOI) of 0.1, 1, 10 and 100. LPST153 had a latent period of 10 min and a burst size of 113 ± 8 PFU/cell. Characterization of the phage LPST153 revealed that it would be active and stable in some harsh environments or in different conditions of food processing and storage. After genome sequencing and phylogenetic analysis, it is confirmed that LPST153 is a new member of the Teseptimavirus genus of Autographivirinae subfamily. Further application experiments showed that this phage has potential in controlling Salmonella in milk and sausage. LPST153 was also able to inhibit the formation of biofilms and it had the ability to reduce and kill bacteria from inside, including existing biofilms. Therefore, the phage LPST153 could be used as a potential antibacterial agent for Salmonella control in the food industry.

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