Judul: Peningkatan Umur Simpan Produk Santan Kelapa (Cocos nucifera l.) dengan Aplikasi Bahan Tambahan Pangan dan Teknik Pasteurisasi
Abstrak: Coconut (Cocos nucifera L.) milk is very useful in Indonesian food consumption. There is a demand from the small industry to preserve coconut milk product by simple technology. The purpose of this research is to choose the most suitable food additives and thermal process in order to extend coconut milk shelf life. In preparing coconut prior extraction step, blanching with hot water gives better result. Main research consists of three stages: determination of the most suitable stabilizer and antioxidant, determination of preservative, and study of the influence of thermal process and coconut milk storage. The result of the research shows that the most effective combination of food additives for unheated coconut milk are CMC (carboxymethylcellulose), BHT (butilatedhidroxytoluene), and methyl parabens. While the most effective combination of food additives for heated coconut milk are carrageenan, BHT, and kalium sorbate. In room temperature storage, based on pH value, emulsion stability, free fatty acid content, and total of microbe parameters, pure coconut milk without treatment will be expired for less than 12 hours. Heating coconut milk will extend the shelf life to 48 hours, and by pasteurization treatment the shelflife will be longer up to 60 hours. Store in refrigerator for coconut milk without heating will extend the shelf life to 8 days. Coconut milk with and without pasteurization will expire less than 2 months. Use of food additives combination and pasteurization technique, supported by cool storage can extend the shelf life of coconut milk product significantly. Stability is 75.49%; free fatty acid is 0.84; the total of microba is 3.55x103 cfu /ml. Based on the experiment shows that pasteurization coconut milk has either best quality. Furthermore, from the research the best quality of coconut milk is by thermal process, with the heat 75oC, and pasteurization. And at the cool condition (refrigerator) storage will make the coconut milk keep fresh longer.
Keyword: 

Judul: Pendugaan Umur Simpan Produk Coconut Aminos dengan Metode Accelerated Shelf-Life Testing (ASLT).
Abstrak: Coconut aminos adalah produk kecap asin yang dibuat dari pengolahan nira kelapa dengan proses moromi. Umur simpan (shelf life) produk pangan merupakan salah satu informasi yang sangat penting bagi konsumen. Pencantuman informasi umur simpan menjadi sangat penting karena terkait dengan keamanan produk pangan dan untuk memberikan jaminan mutu pada saat produk sampai ke tangan konsumen. Penelitian ini bertujuan mengetahui perubahan mutu produk, dan menduga umur simpan, dengan metode Accelerated Shelf-Life Testing (ASLT). Kemasan yang digunakan adalah botol kaca. Pengujian umur simpan dilakukan dengan menyimpan produk dalam tiga kondisi suhu yang berbeda, yaitu 30oC, 40oC, dan 50oC. Parameter yang diamati yaitu kecerahan (nilai L*), kadar protein kasar,dan pH. Parameter derajat keasaman atau pH dipilih sebagai parameter kritis karena memiliki konstanta k mutlak dan koefisien korelasi paling tinggi dengan batas kritis sebesar 3,5. pH pada produk coconut aminos selama penyimpanan pada suhu 30oC, 40oC, dan 50oC mengalami penurunan masing-masing sebesar 0.0075%, 0.0133%, 0.0227% per minggu. Umur simpan produk coconut aminos sebesar 66 minggu 2 hari (30oC), 37 minggu 4 hari (40oC), 22 minggu 1 hari (50oC)
Keyword: batas kritis, coconut aminos, kemasan, mutu, umur simpan

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
Keyword: