Judul: Pengeringan dan Formulasi Serbuk Minuman Berbasis Sayuran dengan Pengeringan Semprot.
Abstrak: Demand of healthy and natural food products are increasing as people awareness of health and food consumption arise. This condition promotes emerging trend in healthy food such as vegetable juices and beverages. The general purpose of this research was to develop a convenient and acceptable powdered drink based on vegetables--broccoli, spinach, and carrot. Specific purposes were to find the right concentration of filler agent, and to evaluate the acceptance of the product based on sensory test. Raw vegetables were obtained from local grocery store and sprayed with controlled parameters, 180oC for inlet and 80oC for outlet temperature with 600ml/h feed rate. Maltodextrin (MD) were used as filler agent with concentration of 8, 10, and 12 percent. The powdered products were then analyzed for their moisture content and rehydration rate, and also sensory tested. Combined test results showed that the best MD concentration for each powdered juice base are: broccoli MD 10%, spinach MD 12%, and carrot MD 10%. Chosen powdered vegetable juices were then dry mixed and sensory tested to find the most acceptable formula. Powdered-juice formula that contains more carrot juice (60% carrot, 25% spinach, 15% broccoli, and 30% sugar) was found to be most preferred by consumers. However, it is suggested more research to be done in order to increase the solubility of the powdered juices and to increases consumers acceptance of the product.
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Judul: Optimasi Formula Minuman Sari Buah Nanas-Wortel Menggunakan Desain Mixture D-Optimal
Abstrak: Pasar minuman ringan Indonesia sudah tersaturasi dengan minuman yang sama, dengan sedikit variasi, seperti minuman teh kemasan Ready to drink (RTD) dan minuman ringan berkarbonasi. Minuman ringan dengan basis buah jarang ditemukan, dan lebih jarang lagi berdasarkan buah nanas. Penelitian ini bertujuan untuk menemukan formula optimal untuk minuman ringan berbasis nanas-wortel dengan menggunakan metode Response Surface Method (RSM) dengan desain mixture D-Optimal. Penelitian ini juga bertujuan mengukur kadar antioksidan dari formula optimal yang didapatkan dengan menggunakan metode DPPH. Formulasi menggunakan tiga variabel bebas dan lima variabel tetap, variabel bebas berupa jumlah ekstrak wortel (10-30%, bb), jumlah ekstrak nanas (15-35%, bb), dan jumlah gula (5-10%, bb). Variabel tetap berupa jumlah air mineral (50%, bb), jumlah CMC (500 mg/L), jumlah Na-Alginat (500 mg/L), jumlah asam sitrat (200 mg/L), dan jumlah asam askorbat (200 mg/L). Menggunakan piranti lunak Design Expert 13.0® dengan parameter desain model special cubic, algoritma pencarian both exchanges, dan jenis keoptimalan D-Optimality didapatkan 17 formulasi yang diukur respon fisik (Total Padatan Terlarut (TPT) dan Warna (L*, a*, b*, C*, h)), respon kimia (pH), dan respon sensori (warna, aroma, rasa, keseluruhan) untuk optimasi. Dari optimasi menggunakan respon 17 formulasi tersebut didapatkan formula optimal dengan komposisi 5% (bb) gula, 10% (bb) ekstrak wortel, 35% (bb) esktrak nanas, 50% (bb) air, 500 mg/L CMC, 500 mg/L Na-Alginat, 200 mg/L asam askorbat, dan 200 mg/L asam sitrat yang memiliki desirability 0,93. Pengukuran kapasitas antioksidan formula optimal menunjukkan bahwa formula optimal memiliki kapasitas antioksidan ekuivalen dengan 93,05 mg/L asam askorbat., The Indonesian soft drink market is currently saturated with the same kinds of drinks like RTD tea, soda, et cetera. Rarely do we find soft drinks based on fruit, and even rarer based on pineapple. This research is aimed to find an optimal formula for a soft drink based on pineapple-carrot juice using the Response Surface Method (RSM) using a D-Optimal mixture design. This research also aims to measure the antioxidant activity of the obtained optimal formula using the DPPH method. The formulation of the drink consists of three independent variable and five control variables, which are amount of carrot extract (10-30%, wb), amount of pineapple extract (15-35%, wb), and amount of sugar (5-10%, wb). The control variables are water (50%, wb), CMC (500 mg/L), Na-Alginate (500 mg/L), ascorbic acid (200 mg/L), and citric acid (200 mg/L). Formulation using Design Expert 13.0® with a special cubic model, both exchanges search algorithm using D-Optimality, we get a total of 17 formulas. These 17 formulas are then measured for physical response (Total soluble solids (TSS) and Color (L*, a*, b*, C*, h)), chemical response (pH), and sensory response (color, aroma, taste, overall). Using the responses from those 17 formulas, optimation was done to receive an optimal formula consisting of 5% (wb) sugar, 10% (wb) carrot extract, 35% (wb) pineapple extract, 50% (wb) water, 500 mg/L CMC, 500 mg/L Na-Alginate, 200 mg/L citric acid, and 200 mg/L ascorbic acid, which has a desirability of 0,93. Measuring the capacity of the optimal formula, it is found to be equivalent to 93.05 mg/L of ascorbic acid.
Keyword: Antioksidan, Optimasi Formula, Respon Sensori, Sari Buah

Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
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