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- 저자 : rosnita a . talib (검색결과 2 건)
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Physicochemical and Nutritional Properties of Spray-dried Pitaya Fruit Powder as Natural Colorant
Ng Lay Tze,chong pik han,yus aniza yusof,chin nyuk ling,rosnita a . talib,farah saleenataip,mohammad gulzarul aziz 한국식품과학회 2012 Food Science and Biotechnology Vol.21 No.3
Pitaya commonly known as dragon fruit is very popular of its intense color, constituent minerals, vitamins,and antioxidant properties. In this study, physiochemical properties of whole pitaya fruit powder as influenced by 2different maltodextrin concentrations (20 and 30%) and 4different inlet temperatures (145, 155, 165, and 175oC) were carried out. As inlet temperature increased moisture content and water activity decreased and this change was apparent at high concentration of maltodextrin. The best spray drying condition in relation to betacyanin content was 155oC inlet temperature and 20% maltodextrin concentration. Concerning the flowability, all factors and their levels resulted in poor flowing powder. From nutritional point of view, pitaya fruit powder was found rich in protein, fat, ash, fiber, and antioxidant. This study indicated that the pitaya fruit powder produced from whole pitaya fruit has potential to use as natural coloring agent and a health supplement.
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Optimization of Spray Drying Parameters for Pink Guava Powder Using RSM
Mohammad Rezaul Islam Shishir,farah saleenataip,Norashikin Ab. Aziz,rosnita a . talib,Md. Sazzat Hossain Sarker 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.2
The optimization of pink guava was executed using central composite face-centred design to optimize the spray drying parameters of inlet temperature, maltodextrin concentration (MDC) and feed flow (FF). The experimental results were significantly (p<0.01) fitted into second-order polynomial models to describe and predict the response quality in terms of the final moisture, particle size and lycopene with R2 of 0.9749, 0.9616, and 0.9505, respectively. The final moisture content significantly (p<0.01) decreased with increasing inlet temperature and MDC, whereas the particle size increased. In contrast, the lycopene content significantly (p<0.01) decreased with the higher temperature and increased with increasing MDC. However, according to multiple response optimization, the optimum conditions of 150oC inlet temperature, 17.12% (w/v) MDC and 350 mL/h FF-predicted 3.10% moisture content, 11.23 μm particle size and 58.71 mg/100 g lycopene content. The experimental observation satisfied the predicted model within the acceptable range of the responses.
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