ANTIOXIDANT ACTIVITY, DEXTROSE EQUIVALENT, TOTAL DISSOLVED SOLIDS, AND VISCOSITY OF MALTED RED RICE MILK AT DIFFERENT ENZYME CONCENTRATIONS

Rice milk is a plant-based milk-like product that can be an alternative for people who have an allergy to bovine milk and lactose intolerance. Malting and enzymatic hydrolysis can bring out the natural sweetness of the rice milk product and thus minimize the use of sweeteners. The current research aimed to determine the total value of dissolved solids, viscosity, dextrose equivalent, and antioxidant activity in malted red rice milk with the addition of glucoamylase at different concentrations. The red rice was malted for 48 hours before drying and milling. The resulted malt powder was then diluted and added with glucoamylase enzyme at the concentration of 0%, 1%, 2%, and 3%. Enzymatic hydrolysis occurred at 60°C for 3 hours. Completely Randomized Design was used for the parameters of total soluble solids, viscosity, and dextrose equivalent while the antioxidant activity parameter was analyzed descriptively. The result showed that the addition of glucoamylase significantly (p<0.05) increased the total soluble solids, viscosity, and dextrose equivalent. The highest values were 9.960 °Brix, 1620 cP, and 1.872 for total dissolved solids, viscosity, and dextrose equivalent, respectively. Increasing antioxidant activity was also observed from 6.094% at 0% glucoamylase to 10.762% at 3% glucoamylase addition.

Conversion of corn fiber into fuel ethanol

Corn fiber due to its chemical composition (up to 20% starch, 50 - 60% non-starch polysaccharides) and availability has potential to serve as a substrate for manufacture of various products, including fuel ethanol. This paper deals with assessment of fiber-to-ethanol conversion. The water/dry fiber ratio in suspensions was 10/1. Enzyme liquefaction and saccharification of residual starch in corn fiber was carried out in two steps with thermostable α-amylase (20 min, 120°C) and mixture of pullulanase and glucomalyse (24 hours, 60°C). Procedures resulted in release of 57.7±1.6 mg of glucose per gram of dry fiber basis. It responds to the dextrose equivalent expression to 96.7±2.2%. By fermentation of the starch hydrolysates by yeasts Saccharomyces cerevisiae CCY-11-3 (5% v/v inoculum, 28°C, 72 hours) 0.48 g of ethanol per gram of glucose in hydrolysates was obtained. The solids after starch hydrolysis were separated by filtration and processed by acid pretreatment (0.1 g of conc. HCl/g of biomass/5 ml of water, 120°C, 20 min) with subsequent enzyme hydrolysis (24 hours, 60°C) by the multienzyme preparations containing cellulases and hemicellulases. Overall yield of reducing sugars after these two steps was 740.7±3.9 mg/gram of dry corn fiber basis. Fermentation of lignocellulosic hydrolysates by yeasts Pichia stipitis CCY-39-50-1 and Candida shehatea CCY-29-68-4 (in both cases 5% v/v inoculum, 28°C, 72 hours) resulted in 0.38 and 0.12 g of ethanol per gram of reducing sugars. The results indicate that applied pretreatment methods and used microorganisms are able to produce ethanol from corn fiber.

Effect of Continuous and Discontinuous Microwave-Assisted Heating on Starch-Derived Dietary Fiber Production

Dietary fiber can be obtained by dextrinization, which occurs while heating starch in the presence of acids. During dextrinization, depolymerization, transglycosylation, and repolymerization occur, leading to structural changes responsible for increasing resistance to starch enzymatic digestion. The conventional dextrinization time can be decreased by using microwave-assisted heating. The main objective of this study was to obtain dietary fiber from acidified potato starch using continuous and discontinuous microwave-assisted heating and to investigate the structure and physicochemical properties of the resulting dextrins. Dextrins were characterized by water solubility, dextrose equivalent, and color parameters (L* a* b*). Total dietary fiber content was measured according to the AOAC 2009.01 method. Structural and morphological changes were determined by means of SEM, XRD, DSC, and GC-MS analyses. Microwave-assisted dextrinization of potato starch led to light yellow to brownish products with increased solubility in water and diminished crystallinity and gelatinization enthalpy. Dextrinization products contained glycosidic linkages and branched residues not present in native starch, indicative of its conversion into dietary fiber. Thus, microwave-assisted heating can induce structural changes in potato starch, originating products with a high level of dietary fiber content.

Thermoplastic extrusion in biotechnology of starch-containing raw materials

Рассмотрены основные аспекты использования экструзии крахмалсодержащего сырья как стадии его подготовки к биоконверсии. Показана возможность получения гидролизатов с концентрацией сухих веществ до 50-60 %, декстрозным эквивалентом мальтодекстринов 20-40, глюкозных сиропов - до 95 ДЭ. The main aspects of using starch extrusion as a pretreatment stage for subsequent bioconversion are discussed. The possibility of obtaining hydrolysates with solids up to 50-60% is shown. The dextrose equivalent of maltodextrins obtained after the extrusion pretreatment step was 20-40. DE of glucose syrups reached 95.

Validasi Proses Produksi Dektrosa Monohidrat (DMH) Farmasi pada Skala Pilot

Armaceutical dextrose monohydrate (DMH) as one of the raw materials for drugs which is widely used in the manufacture of infusions and drug preparations, including BBO, which is entirely still imported. To achieve the independence of national pharmaceutical raw materials, it is important to study and develop the DMH pharmaceutical production process technology in Indonesia. In this research, the validation of the DMH pharmaceutical production process using food quality liquid glucose raw materials on a pilot-scale of 5 - 6 kg/product was carried out. The validation process has been carried out three times in all stages of the process, namely saccharification, carbon purification, resin purification, evaporation, crystallization, centrifugation, and drying. Several test parameters have been established at each stage of the process so that the repeatability of the production process and the quality of pharmaceutical DMH can be achieved. The results showed that each stage of the process played a role in improving the quality of dextrose. Product yield and weight loss of dextrose in the whole process were 50–52% and 9–10%, respectively. The results of testing the levels of dextrose (dextrose equivalent/DE), endotoxin content, pyrogen-free tests, and other parameters that have been carried out on pharmaceutical DMH products have met the quality requirements according to the Indonesian Pharmacopoeia Edition V. In conclusion, the validation results show that the bench-scale pharmaceutical DMH production process technology is developed to produce pharmaceutical DMH products with process repeatability and good quality. Abstrak Dekstrosa Monohidrat (DMH) farmasi merupakan bahan baku obat (BBO) yang banyak digunakan pada pembuatan infus dan sediaan obat serta termasuk salah satu BBO yang seluruhnya masih dimpor. Untuk mencapai kemandirian bahan baku farmasi nasional, maka pengkajian dan pengembangan teknologi proses produksi DMH farmasi menjadi penting untuk dilakukan di Indonesia. Dalam penelitian ini telah dilakukan validasi proses produksi DMH farmasi menggunakan bahan baku glukosa cair kualitas pangan pada skala pilot 5–6 kg produk/bets. Proses validasi telah dilakukan sebanyak tiga kali ulangan pada seluruh tahapan proses yaitu sakarifikasi, pemurnian dengan karbon, pemurnian dengan resin, evaporasi, kristalisasi, sentrifugasi, dan pengeringan. Beberapa parameter uji telah ditetapkan pada setiap tahapan proses agar keterulangan proses produksi dan kualitas DMH farmasi dapat tercapai. Hasil penelitian menunjukkan bahwa setiap tahapan proses berperan dalam peningkatan kualitas dekstrosa. Rendemen produk dan kehilangan berat dekstrosa pada keseluruhan proses masing-masing adalah 50–52% dan 9–10%. Hasil pengujian kadar dekstrosa (dekstrosa ekivalen/DE), kandungan endotoksin, uji bebas pirogen, dan parameter lain yang telah dilakukan terhadap produk DMH farmasi adalah sudah memenuhi persyaratan kualitas sesuai Farmakope Indonesia Edisi VI. Disimpulkan, hasil validasi menunjukkan bahwa teknologi proses produksi DMH farmasi skala pilot yang dikembangkan dapat menghasilkan produk DMH farmasi dengan keterulangan proses dan kualitas yang baik.

Research and Development of Maltodextrin Production Technology for the Dairy Industry

Introduction. Maltodextrins are a common dietary supplement with a number of positive properties. They consist of D-glucose units connected by a (1–4) glucoside bond. The research objective was to improve the existing technology of maltodextrin production based on potato and corn starch. Study objects and methods. Maltodextrins were obtained by enzymatic and acidic incomplete hydrolysis of potato and corn starch. Amilolux ATS and Glucolux A were used for enzyme hydrolysis, and sulfuric acid was used for acid hydrolysis. The finished product was obtained by spray drying. The sensory properties of the finished product were determined by standard methods. The method of high-performance liquid chromatography defined the hydrocarbon composition, while the method of dextrose equivalent helped to determine the reducing capacity of sugars. Results and discussions. The study improved the technique of the enzymatic breakdown of starch. Amylolysis ATS proved to be the optimal enzyme preparation in concentration of 0.5 mL/50 cm3). Other optimal parameters included the starch-splitting activity of 2,330.50 u/mL, temperature of hydrolysis of 65 ± 2°C, and pH reactions of pH 6.5. The method of spray drying proved most efficient for drying starch hydrolysates: the drying temperature and air flow was 100°C, while the flow rate of the solution was 12 mL/min). The experiment also established the dextrose equivalent of the finished product (12–13%) and the quantitative content of sugars in the obtained samples. For maltodextrins obtained from potato starch, the content of maltose and glucose was 16.73 ± 0.25% and 12.48 ± 0.050%, respectively; for corn maltodextrins – 40.22 ± 0.30% and 52.93 ± 0.040%. Conclusion. The market for food additives is developing rapidly. Maltodextrin is a natural food additive that can be used in various branches of food industry. The research made it possible to improve the technology of maltodextrin production in t dairy industry.

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

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.

Encapsulation of extracted carotenoids of Cucurbita maxima through lyophilization

Purpose This study aims to encapsulate the crude carotene pigment isolated from waste portion of Cucurbita maxima with the help of different encapsulating agents through lyophilization to transform crude pigment into stable form for further utilization. Design/methodology/approach This paper opted for encapsulation of extracted carotene pigment by lyophilization using various carrier materials such as maltodextrin 20 dextrose equivalent (DE), maltodextrin 10 DE and tapioca starch along with emulsifier polysorbate-80. After encapsulation of crude carotene pigment, prepared encapsulated powder was subjected to chemical analysis. The data was analysed statistically by a complete randomized design. Findings Maximum encapsulation efficiency, carotene content, antioxidant activity and water solubility index were achieved when 0.06% of crude carotene pigment was emulsified with same quantity of polysorbate-80, followed by encapsulation with 20% of maltodextrin 20 DE during lyophilization. Originality/value Even though few researchers have worked on the encapsulation of colour pigments, no researcher has reported encapsulation of carotene pigment extracted from waste of C. maxima.