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Journal : Reaktor

Encapsulation of Soursop (Annona muricata Linn.) Leaf Tea Extract Using Natural Mucilage Melanie Cornelia; Kam Natania; Herry Cahyana; Edison Sutiyono
Reaktor Volume 19 No. 1 March 2019
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (361.526 KB) | DOI: 10.14710/reaktor.19.1.26-33

Abstract

The bioactively rich soursop leaf extract can be encapsulated inside several natural coating materials. The extract of soursop leaf has been found to contain many bioactive compounds such as various phenolic compounds that are beneficial for anticancer, antidiabetic and many other health benefits. However due to the sensitive nature of the bioactive molecules, encapsulation procedure was applied to prolong the activity of the biomolecules. Capsule materials used in this experiment were obtained from natural extract of Okra mucilage, Aloe vera mucilage and Maltodextrin-WPI mixture to protect the unstable bioactive compounds. Homogenation time using ultrasonication and Core to Coating ratio was differed to observe the optimum encapsulation process. The encapsulation efficiency, release factor ability, size distribution and its correlation with bioactive stability are observed using Total Phenolic methods and Antioxidant Activity before and after encapsulation. Aloe vera gave best encapsulation efficiency (88-91%) while microcapsule made with Okra gave the best antioxidant activity (DPPH IC50 633-710ppm), and maltodextrin-WPI gave best powder recovery (yield 70-73%). Keywords: aloe mucilage, antioxidant activity,  encapsulation, okra mucilage, soursop tea extract
THE UTILIZATION OF CHICKEN BONE FLOUR AS A SOURCE OF CALCIUM IN COOKIES MAKING Melanie Cornelia; Dhanny Prasetya Gozali
Reaktor Volume 18 No. 1 March 2018
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (604.642 KB) | DOI: 10.14710/reaktor.18.1.31-37

Abstract

Chicken bone contained high calcium, but that utilization was very limited and mostly as a waste. Calcium was needed for humans, especially who were in period of growth. The purpose of this research was to utilize chicken bone flour as a source of calcium in cookies making. Cookies were food products that often consumed by people in Indonesia because easy to make and have a longer shelf life. The initial phase of this research was to find the best process of chicken bone flour from broiler chicken bone and kampong chicken bone as raw materials. The best chicken bone flour have high calcium content of 18061.12 mg/100 g, low fat content 13.79% and yield 34.63%. The formulation of cookies making were trial to add 0, 5, 10, 15, and 20% of chicken bone flour into cookies. From scoring and hedonic test by panelists, cookies were made with additional 5% of chicken bone flour was more preferable. So the best formulation was cookies which has calcium content 464.03 mg/100 g, 26.58% fat, and hardness 1372.03 g/cm2.  These cookies have characteristics and nutrients better than the cookies control. Keywords: cabinet drying; calcium; chicken bone; cookies; flour