Judul: Kombinasi Pelapisan Lidah Buaya (Aloe vera L.) dan Void Volume Kemasan untuk Mempertahankan Kesegaran Buah Rambutan (Nephelium lappaceum, Linn.)
Abstrak: The freshness of Rambutan fruits is sometimes is only observed by the outer appearance, likely its hair and the skin colour of the fruits. To maintain the freshness of rambutan fruits, one of which to do is the Aloe vera L. coating combined to void volume packaging. The purpose of this research were to determine the influence of optimum concentration of Aloe vera L. and void volume given in the packaging towards rambutan fruits freshness. This research was conducted at 3 different concentration (0%, 25% and 50%) of Aloe vera L. solution and 2 different void volume combinations (0% and 25%) of packaging with 10 oC of storage temperature. According to observation and statistical analysis showed that the best results were 25 % Aloe vera L. coating and 25 % void volume of packaging. Based on that treatment, skin and hair appearance of the fruits could be accepted by consumer until 10 day of storage.
Keyword: void volume packaging., rambutan, coating, freshness, Aloe vera L., Bogor Agricultural University (IPB)

Judul: Aplikasi Kemasan Vakum Dan Pelapisan Lidah Buaya (Aloe Vera L.) Untuk Mempertahankan Kesegaran Buah Rambutan (Nephelium Lappeceum L.).
Abstrak: Buah rambutan merupakan salah satu komoditi pertanian yang mudah mengalami penurunan mutu, oleh sebab itu perlu dilakukannya penanganan pasca panen untuk mempertahankan kesegarannya. Tujuan penelitian ini adalah untuk menentukan kombinasi teknik kemasan dan perlakuan konsentrasi lidah buaya (Aloe vera L.) sebagai edible untuk mempertahankan kesegaran buah rambutan. Perlakuan pencelupan buah rambutan dilakukan dengan larutan Aloe vera L. konsentrasi 10% dan 20%, sedangkan perlakuan teknik kemasan dilakukan dengan menggunakan plastik perforasi 10% dari luas permukaan kemasan dan kemasan vakum plastik. Seluruh perlakuan disimpan dalam refrigerator pada suhu 10 °C. Hasil penelitian menunjukkan bahwa perlakuan terbaik adalah pencelupan ke dalam larutan Aloe vera L. konsentrasi 10% dan kemasan perforasi 10% yang dapat menekan jumlah mikroorganisme sebesar 55767 koloni/ml, diterima panelis untuk kesegaran kulit hingga hari ke-9, dan rasa daging buah hingga hari ke-15.
Keyword: coating, kemasan vakum, kesegaran, lidah buaya, rambutan

Judul: Analysis of Unequal Income Distribution with Cobb-Douglas Production Function
Abstrak: This paper studies the economic growth model by Moav (2002). Moav model shows the existence of unequal income distribution between low-income with high-income community. That kind of unequal income distribution is caused by uneven distribution of income. On this Moav model, there is one area called the threshold. Threshold becomes a benchmark to determining whether a society is categorized into low- or high- income community. The production function used in this paper is the Cobb-Douglas function. The dynamics of this model is described as difference equation of low-income, threshold, and high-income community. Simulation study on the model is carried out using Maple 13 and Mathematica 7.0 software. Overall, from the observed case, high-income community will reach a stable condition earlier, followed by the threshold, and then the low-income community.
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