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The coconut sugar powder produced by vacuum drying and conventional method has high hygroscopicity due to its high sugar content (mostly sucrose). Therefore, it is easier for caking to occur during storage. An anticaking agent such as tricalcium phosphate was therefore added to the powder to maintain its stability. The purpose of this research was to determine the physical characteristics of amorphous and crystalline coconut sugar after the addition of tricalcium phosphate (TCP) in different concentrations. The two types of coconut sugar were prepared by the conventional method, which gave it a predominantly crystalline structure, and the vacuum drying method, which gave it a mainly amorphous structure. The TCP at concentrations 0, 0.5%, and 1% was added to both types of the coconut sugar. The addition of the anticaking agent affected the water sorption of coconut sugar by decreasing the monolayer water content for both types of coconut sugar. TCP seemed to give more significant effect on decreasing the hygroscopicity of crystalline coconut sugar than the amorphous one, while similar trends were obtained in increasing flow ability of both types of coconut sugar. The capacity of TCP to cover the surface of the host coconut powder was proposed as the mechanism of TCP in decreasing hygroscopicity and increasing flow ability of the host powder.

Propolis has known as an aromatic resin which possesses several health beneficial properties such as antimicrobial and antioxidant due to bioactive and its complex composition. Propolis has been utilized in the form of extract; however, the application in food is limited due to its insolubility in water and undesirable sensory characteristics. Encapsulation of propolis using spray drying method with addition maltodextrin with or without arabic gum could reduce the undesirable sensory characteristic, protect bioactive compounds, and increase its availability in water-soluble matrices. The total bioactive compounds were evaluated before and after the drying process in order to know the ability of matrices wall to protect it. Physical properties such as hygroscopicity and surface structure were evaluated. Maltodextrin and arabic gum ratio affect phenolic content which is in a range of 0.0425–0.0445%, and also flavonoid content in a range of 0.00273–0.00415%. The coating agent ratio also affects the hygroscopicity which is in a range of 12.01–14.06% and moisture content which is in a range of 4.65–7.71%. The SEM images show that the cracks and hollows are often on the microcapsule surface, but the particle size is more homogeneous.

Wastewater produced from cheese industry is rich in biological component such as whey protein, fat and lactose. Whey protein is the residual liquid of cheese making process with a high protein efficiency ratio. The wastewater source used in this study was whey liquid from cheese processing industry located at West Java, Indonesia . Conversion of soluble whey protein into whey protein microparticle is required to produce food with nutritional value that can be adjusted to the needs of the specific target with high digestibility and palatability. Whey protein was collected by separation technique through heat treatment at specific condition. This was done by changing the heat treatment condition and pH of the samples. Changing the pH of the samples before heat treatment affect the ionic strength of the whey protein h ence, a ltering the properties of the concentrate . This study aims to produce whey protein concentrate heated at various pH level and to observe physicochemical and functional properties of the concentrates. The method used in this research was a descriptive method conducted on three treatments and two replications namely whey protein concentrate production in a pH condition 6.4; 6.65; and 7.0. The parameters observed were physicochemical and functional properties. Furthermore, the result showed that there were decrease in protein content, along with the increasing pH before heat treatment. Microstructure image (SEM) showed a finer particles with the increasing pH. Meanwhile, solubility of the rehydrated samples tend s to increase along with the increasing pH. The measurement of functional properties of the samples showed that denatured whey protein produced at different pH before heat treatment ha ve different water holding capacity and a tendency to form bonds between protein particles t hereby increasing the viscosity value. These physicochemical and functional properties were suitable for denatured whey protein to be used as a texture controller in whey protein based-food production.

Coconut sugar is traditionally produced by evaporating sap until reaching its saturated liquid and formed a crystalline structure. This study investigated the comparison of coconut sugar made by traditional method (crystalline structure) and dried coconut sugar (predominantly amorphous structure) to its characteristics. Two different formulation of coconut sap : maltodextrin (7 : 3) and (6 : 4) (weight/weight) were dried using vacuum oven (70℃, 6 hours) and spray dried (Tinlet 120℃.) Coconut sugar was characterized for moisture content, crystallinity, water sorption isotherm, hygroscopic rate, color, dissolving time, and powder recovery. Initial moisture content was examined and in range of 1.33% - 3.44% (wb). The highest monolayer water content was obtained by using spray drying (6 : 4) and lowest was obtained by traditional method. X-ray diffraction showed that dried coconut sugar powder had dominant amorphous structure (70.9 – 71.4%) while traditional one was dominated with crystalline structure (90.5%). Traditional coconut sugar was the least hygroscopic (1.21 × 10-4 g water/g solid/minutes), followed by vacuum dried coconut sugar (1.48 × 10-4 g water/g solid/minutes) and spray dried ones (1.56 – 1.67 × 10-4 g water/g solid/minutes). Spray dried coconut sugar had the brightest and the whitest color, followed by vacuum dried and traditional coconut sugar. Vacuum dried powder was quicker to dissolve (13.33 – 16.67 s), while increasing maltodextrin in spray drying could not decrease the dissolving time. The highest powder recovery of dried sugar was obtained by using vacuum drying and higher maltodextrin concentration (88.70%) while traditional method produced 100% powder recovery.

The aims of this study were to evaluate the role of encapsulant materials on the stability of bioactive compounds of red ginger extract powder during storage and determine the composition of the encapsulant materials which produced red ginger extract powder with best stability of bioactive compounds during storage. This study consisted of three compositions of encapsulant materials which are maltodextrin:gum arabic with ratio 10:0, 8:2, and 5:5. The results showed that several compositions of encapsulant materials produced different stability of bioactive compounds of red ginger extract powder. Based on the study result, increasing amount of gum arabic used had better protection to the stability of bioactive compounds of the powders during storage.

Xylitol, a low-calorie sugar made up of five carbon atoms, had the valuable characteristics suitably applied for pharmaceutical and food industries. This sugar can be produced from oil palm empty fruit bunches (OPEFB) through hydrolysis and followed by fermentation. The xylitol in the fermentation broth requires the downstream process to obtain the final product with high purity and yield. Among a series of xylitol downstream process, crystallization becomes a critical step since this process determines the properties of final products. The objective of this study was to evaluate the effect of evaporation temperature (55°C and 70°C) and seeding addition (0%, 0.1%, 0.5%, 1 %) in the crystallization step on the physicochemical properties of xylitol crystals obtained from the OPEFB hydrolysate. The main evaluation criteria were crystal contents, purity, melting point, water content, hygroscopicity, solubility, caloric content, and crystal xylitol yield. The result showed that the crystal form obtained was relatively sticky and had lower purity than commercial ones because the concentration of xylitol solution increased after evaporation. The differences of physicochemical properties of the crystals such as the purity, porosity, yield and crystal form were influenced by evaporation temperature. The crystals formed by 70°C evaporation temperature produced the crystals with higher caloric value and purity, but it had lower hygroscopicity and moisture content than crystals formed by 55°C. However, the percentage of seeding gave an insignificant impact on xylitol crystal properties.

Cocoa shell and cocoa husk are the waste from the processing of cocoa beans whose utilization has not been done optimally. The cocoa shell and cocoa husk contain phytochemical compounds which are potential to inhibit the growth of pathogenic bacteria in food products. The aim of this study is to find the ratio of cocoa shell extracts and cocoa husk extracts that most effectively inhibited the growth of Escherichia coli, Staphylococcus aureus and Salmonella sp. The method used experimental research followed by Randomized Block Design Factorial Pattern with 9 treatments and 3 replication. The treatment consists of two factors. The first factor was 3 types of extract (1:1, 2:3 and 3:2) and the second factor was 3 bacteria types (Escherichia coli, Staphylococcus aureus and Salmonella sp). The result showed that the extract mixture of cocoa shell and cocoa husk didn’t provide interaction effects, but provided an independent effect to inhibit the various types of bacteria. The comparison of 3:2 w/w of cocoa shell and cocoa husk extract contain phenol 0.063% and flavonoid 0.0191% gave the most effective inhibitory effect on Escherichia coli with a diameter of inhibition zone 5.84 mm (resistant), Staphylococcus aureus 4.04 mm (resistant) and Salmonella sp. 21.00 mm (sensitive) and was able to reduce the total bacteria of Escherichia coli 7.67 log CFU/ml (6.19%), Staphylococcus aureus 7.06 log CFU/ml (13.65%) and Salmonella sp. 6.49 log CFU/ml (20.62%). Phytochemical tests showed that cocoa shell extract and cocoa husk extract containing phenol, flavonoid, triterpenoid, tannin, and alkaloid.

This research aimed to use conventional and modern extraction methods for extraction of C. domestica and C. xanthorrhiza oleoresins. For this purpose, maceration, Soxhlet, and Ultrasound-Assisted Extraction (UAE) were implemented to extract oleoresins. All the extraction method used acetone as a solvent with the ratio of ground spices to solvent was 1:5 (w/w). The results showed that the Soxhlet extraction method gave the highest oleoresin yield of C. domestica (18.89 ± 0.68%) and C. xanthorrhiza (14.70 ± 0.62%). Maceration method gave the highest curcumin yield of 49.52 ± 0.63% and 15.82 ± 0.27% for C. domestica and C. xanthorrhiza oleoresins, respectively. Meanwhile, the oleoresin obtained from the UAE method gave the lowest residual solvent on both C. domestica (16.00 ± 4.67%) and C. xanthorrhiza (15.66 ± 3.33%) oleoresins. C. xanthorrhiza oleoresin obtained from maceration tends to show the best colour, while the best colour of C. domestica oleoresin obtained from UAE. Propylene glycol had the best solubility for C. domestica oleoresin, while C. xanthorrhiza oleoresin was soluble in all solvents.