Judul: The Utilization of Apple Velvet Fruit (Diospyros  blancoi A.DC) with Strawberries (Fragaria ananassa) as Smoothies for Elderly
Abstrak: Radikal bebas dalam tubuh yang melebihi kemampuan tubuh untuk mengelolanya akan menyebabkan terjadinya stres oksidatif. Lansia rentan mengalami stress oksidatif. Tubuh memerlukan antioksidan yang dapat membantu melindungi tubuh dari serangan radikal bebas sehingga dapat memelihara sistem kekebalan tubuh. Buah bisbul meruapakan buah sumber antioksidan yang masih jarang dimanfaatkan dan buah stroberi memiliki potensi sebagai pewarna alami. Penelitian ini bertujuan untuk melakukan pemanfaatan buah bisbul dengan buah stroberi menjadi produk smoothies mengandung antioksidan bagi Lansia. Formulasi merupakan perbandingan antara buah bisbul dengan buah stroberi yaitu F1(1:5), F2(1:2), dan F3(1:1). Penelitian ini terdiri dari pembuatan formula, uji organoleptik, analisis kandungan gizi, analisis aktivitas antioksidan, dan analisis karakteristik fisik. Berdasarkan hasil uji organoleptik, F3 merupakan formula terpilih. Kandungan gizi formula terpilih yaitu, kadar air 78,22%, abu 2,58%, lemak 2,74%, protein 5,73%, dan karbohidrat 10,73%. Smoothies buah bisbul dengan stroberi ini diduga mengandung sumber serat dengan kandungan serat 2,2 gram per 100 kkal. Aktivitas antioksidan smoothies buah bisbul dinyatakan dalam IC50 sebesar 467 ppm atau setara dengan 59,3 mg Vitamin C/100 g smoothies. Satu takaran saji smoothies buah bisbul dengan stroberi mengandung 181 kkal energi yang memenuhi syarat kontribusi gizi untuk makanan selingan.
Keyword: antioksidan, bisbul, lansia, radikal bebas, smoothies

Judul: Aktivitas Antioksidan Gel Ekstrak Buah Bisbul (Diospyros discolor Willd.) dengan Metode DPPH.
Abstrak: Buah bisbul (Diospyros discolor Willd.) adalah buah yang awalnya tumbuh liar di hutan-hutan Filipina, dan kini telah menyebar di Indonesia. Buah bisbul berpotensi mengandung senyawa antioksidan. Tujuan penelitian ini adalah menguji aktivitas ekstrak buah bisbul dan gel ekstrak buah bisbul sebagai antioksidan dengan menggunakan metode DPPH. Buah bisbul diekstraksi dengan metode maserasi dan menggunakan etanol 96% sebagai pelarutnya. Penapisan fitokimia menunjukkan bahwa ekstrak buah bisbul mengandung flavonoid, tanin, dan saponin. Ekstrak buah bisbul memiliki aktivitas antioksidan sangat kuat dengan nilai IC50 46.00 ppm, namun gel ekstrak buah bisbul memiliki aktivitas antioksidan sangat lemah dengan nilai IC50 33286.00 ppm.
Keyword: aktivitas antioksidan, buah bisbul, ekstraksi, penapisan fitokimia

Judul: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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