Judul: Pengaruh Jenis dan Konsentrasi Pati terhadap Karakteristik Tepung Nanas (Ananas Comocus (L) Merr) dan Pengaruh CMC Terhadap Karakteristik Velva Berbahan Dasar Tepung Nanas
Abstrak: Pineapple (Ananas comocus (L) Merr) was one kind of fruits in tropical and subtropical area, that contains vitamin C and fiber. Pineapple was a good material for making velva. In the present study, pineapple velva was produced from fresh pineapple puree and pineapple powder. The advantages of pineapple powder for making velva were it is shelf stable at room temperature, and it is simple in serving, packaging, and transportation. The purpose from this research were to evaluate the effect of type and concentration of starch as filler in making pineapple powder and the difference of velva prepared from fresh pineapple puree and that from pineapple powder. The study consist of three stage, i.e. preparation stage, First Experiment, and Second Experiment. The preparation stage consists of making velva from pineapple puree and the determination of objective quality of pineapple velva. The First Experiment consist of making pineapple powder with the addition of starch as filler (tapioca, maizena, and sago), and the selection the best formulae of pineapple powder. The Second Experiment consists of making velva from pineapple powder with the addition of CMC as stabilizer (0%, 0.25%, and 0.5%), organoleptic test, and the selection the best formulae of velva from pineapple powder. The result of pineapple velva objective quality in the preparation stage was used as standard for quality of velva in the later stage. Pineapple velva objective quality consist of viscosity, overrun, melting time, total solid, pH, and vitamin C content. The result show that the best formulae of pineapple powder was the one that used cornstarch with 15% concentration. The result of velva from pineapple powder showed that the viscosity, total solid, and melting time tend to increase with the increase of concentration of CMC, but the overrun, pH, and vitamin C content tend to decrease with the increase of concentration of CMC. The velva from pineapple powder objective quality and the organoleptic test showed that the best formulae is the velva from pineapple powder with the addition 0.25% concentration of CMC
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Judul: Pemanfaatan Limbah Tanaman Nanas (Ananas cosmocus Merr) sebagai Kertas Seni
Abstrak: The objectives of this research were to determine the effect of solvent concentration and cooking time to yield, kappa number, and delignification selictivity, to determine the best condition based on kappa number and delignification selectivity, to determine the effect of pineapple leaf fiber and HVS pulp composition to physical and mechanical properties, and to determine the best composition based on physical and mechanical properties. In this research, the solvent used in the pulping are NaOH and CaO with four concentration level (10%, 15%, 20%, dan 25%) and two cooking time level (1 hour dan 2 hour). The result of Anova showed concentration factor significantly affect to chemical properties of pulp. The pulp yield, kappa number, and delignification selectivity obtained from NaOH consecutively, i.e 63,26 – 73,14%; 13,243 – 21,982; and 34,072 – 57,230 while the pulp yield, kappa number, and delignification selectivity obtained from CaO consecutively, i.e 75,22 – 88,88%; 18,123 – 20,902; and 35,801 – 41,378. The research result, the best of kappa number and delignification selectivity obtained from NaOH 20% cooking time 1 hour and CaO 10% cooking time 1 hour. Pulp that has been obtained is then combined with HVS pulp in 100:0, 75:25, and 50:50. Grammage, tensile index, and tear index from NaOH paper consecutively, i.e 90,995 – 113,4 g/m2; 1,899 – 4,172 Nm/g; and 1,079 x 10-3 – 1,941 x 10-3 Nm2/g while grammage, tensile index, and tear index from CaO paper consecutively, i.e 55,64 – 64,4 g/m2; 0,785 – 2,254 Nm/g; dan 1,077 x 10-3 – 1,744 x 10-3 Nm2/g. Paper with 100% pineapple leaf fiber from NaOH and paper with 50% pineapple leaf fiber from CaO had better mechanical properties than other combination.
Keyword: Bogor Agricultural University (IPB), pineapple leaf fiber, HVS paper, combination, art paper

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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