Judul: Mempelajari pengaruh jenis pemasakan serta perbandingan tepung kasava (Manihot esculenta Crantz) dan tepung kacang hijau terhadap sifat fisik, kimia dan mutu gizi tepung kasava campuran
Abstrak: Penelitian ini bertujuan untuk mempelajari pengaruh jenis pemasakan dan perbandingan tepung kasava dan tepung kacang hijau terhadap sifat fisik, kimia dan mutu gizi tepung kasava campuran (TKC). Penelitian dilakukan di Laboratorium Kimia Balai Penelitian Tanaman Pangan Sukamandi, Subang dari bulan Mei sampai dengan bulan Oktober 1993. Penelitian ini disusun secara faktorial dengan menggunakan Rancangan Acak Lengkap yang terdiri atas dua faktor yaitu (1) faktor jenis pemasakan yang terdiri atas tiga taraf, yaitu: sangan (A1), panggang (A2) dan pengering silinder (A3); (2) faktor perbandingan tepung kasava dan tepung kacang hijau yang terdiri atas empat taraf, yaitu: 100:0 % (K1), 90:10 % (K2), 80:20% (K3) dan 70:30% (K4). Perlakuan diulang tiga kali. Hasil percobaan menunjukkan bahwa jenis pemasakan berpengaruh sangat nyata terhadap sifat fisik tepung kasava campuran pada taraf 1% yaitu terhadap derajat putih, konsistensi gel, nisbah penyerapan air dan nilai kelarutan air. Derajat putih pemasakan cara sangan memiliki nilai tertinggi sebesar 90,95% dan terendah pada cara pemasakan pres panggang sebesar 60,36%. Konsistensi gel TKC semua perlakuan menunjukkan nilai di atas 50 milimeter yang berarti bahwa tingkat kekerasan TKC cenderung lunak. TKC dimasak dengan pengering silinder memiliki daya menyerap air tertinggi diantara TKC dengan dua jenis pemasakan lainnya. Nilai kelarutan air dipengaruhi oleh kedua perlakuan dan terdapat interaksi antara keduanya.
Keyword: tepung kasava

Judul: Pengaruh Metode Pengeringan terhadap Mutu dan Sifat Fisiko-kimia Tepung Kasava Terfermentasi
Abstrak: Cassava is one important food crops in Indonesia. Carbohydrate is major components in cassava tubers, and made it suitable used for food and energy sources. Nowadays cassava is mainly utilized as direct food, cassava flour and cassava starch (tapioca). But high moisture and prussic acid (HCN) contents in cassava tuber made limitation for human consumption. Fermentation and drying of cassava plays important roles in cassava flour production, since they can influence to the flour characteristics. This research investigated the effect of drying methods of fermented cassava slurry to the flour’s chemical composition and its physico-chemical properties. Fermentation of cassava tuber was conducted using standard operation procedure for MOCAF (modified cassava flour) prepared by Dr. Achmad Subagio (Jember University). There were three drying methods used in research; direct sundrying (16 hours), green house effect drying (hours), and oven drying (12 hours). It is also investigated the duration of drying process; especially for sundrying and green house effect drying, as 3, 5, and 7 hours and then furthered with oven drying for 9, 7 and 5 hours. Solar energy, especially ultra violet irradiation has been proven improved the flour quality. Drying on the green house effect chamber (40,1oC) provided higher average drying temperature compared to direct sundrying (33,5oC), but lower than oven drying (52,6oC). Differences in drying methods gave significant effects on moisture, ash, crude fiber, fat, protein, starch and HCN contents; whiteness degree of flours, total of microbes, microscopic appearance of starch granules, water and oil absorptions, solubility and swelling power at 90oC, and visco-amylography characteristics. All drying methods significantly reduced the HCN contents of flours, but direct sundrying and green house effect drying accelerate the liberation of starch, and caused high final viscosity of flours. Full green house effect drying (16 hours) was recommended for fermented cassava flour since it produced the flour with higher maximum and final viscosity compared to others.
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Judul: Truncated Stop Loss as a Optimal Solution of Reinsurance Agreement in One-Period Model
Abstrak: Reinsurance is one of risk management efforts of an insurance company, which is called the cedent. Similar with insurance, reinsurance constitutes the cedent to pay the premium. We consider one-period reinsurance model and derive a rule which minimizes the ruin probability of the cedent for a fixed reinsurance premium. Therefore, it is needed to construct an optimal reinsurance agreement for the cedent. The premium is calculated according to four different principles, i.e. economic, generalized zero-utility, Esscher, and mean-variance principles. Stop loss is a reinsurance contract which protect the insurance company for losses that exceed a certain amount. The result of this research shows that a truncated stop loss is an optimal agreement in the class of all reinsurance contracts with various premiums calculated using above mentioned principles.
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