Judul: Pembuatan Bibit serta Analisis Ikatan Molekul Miselium Jamur Tiram Putih dengan Fourier Transform Infra Red (FTIR)
Abstrak: Pleurotus Ostreatus is a kind of oyster mushrooms which consumed by the public . This oyster mushrooms contain high nutritional but has a high level in the sterilization when manufacture of seed. Making seeds through several stages , they are the manufacture of pure cultures , spread seeds , and planting seeds . In this study, variations in the manufacturing stages of PDA ( Potato DextrossAgar) for the variation of the old pure cultures of material boiling for 5 minutes , 10 minutes , and 15 minutes and level of sterilization media use variety of steaming tiers 1 , 2 and 3 , which each level of steamed for 1 hour with a temperature of 120 °C and the pressure of 1.5 psi . The highest success is when the variation 10 minutes and the streaming tiers 3 which the growth of mycelium in tube. Fourier Transform Infra Red (FTIR) analysis shows that the force constant of planting seeds (F2) are higher than F0 and F1. If force constant is higher so the molecule bond is stonger. It make mycelium of F2 is stronger too and it is better to be used for cultivation
Keyword: force constant, FTIR, Mycelim, Molecule bond

Judul: Analisis ikatan molekul miselium Jamur Tiram Putih dengan fourier transform infra-red (FTIR)
Abstrak: Kualitas jamur tiram sangat bergantung pada kualitas bibit jamur tiram. Pembuatan bibit jamur tiram dalam penelitian ini meliputi pembuatan media potato dextrose agar (PDA), pembuatan bibit murni (F0), pembuatan bibit sebar (F1), dan pembuatan bibit tanam (F2). Proses sterilisasi pada pembuatan media potato dextrose agar (PDA) divariasikan menjadi tiga tingkat yaitu tingkat 1, tingkat 2, dan tingkat 3 dengan suhu 102 oC. Bibit tingkat 2 merupakan bibit yang baik dibanding bibit tingkat 1 dan 3. Hasil karakterisasi miselium dengan FTIR menunjukkan gugus fungsi C-N, C-O, C-H, C=O, N-H dan O-H. β-glukan teridentifikasi pada gugus fungsi C-O (900-1200) cm-1 dan protein ditunjukkan oleh gugus fungsi C-N (1180-1360) cm-1 dan N-H (1530-1640) cm-1 . Analisis ikatan molekul menunjukkan konstanta pegas yang mendekati literatur.
Keyword: FTIR, oyster mushrooms, spring constant, sterilization, Karakterisasi FTIR, Hasil pembuatan bibit damar

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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