Judul: Identifikasi keragaman cendawan yang memengaruhi mutu mikrobiologik bahan baku dan tepung bulu ayam
Abstrak: Tujuan dari penelitian ini adalah mengidentifikasi keanekaragaman cendawan dan pengaruh kualitas mikrobiologik pada produk tepung bulu ayam. Beberapa cendawan mampu diisolasi dari contoh udara pada ruang unloading, pemotongan, pengumpulan dan ruang produksi. Populasi cendawan lebih tinggi pada musim hujan dibandingkan musim kemarau yang didominasi oleh khamir. Kapang lebih banyak diisolasi pada musim kemarau. Cendawan yang diisolasi pada contoh udara meliputi A. flavus, A. niger, Geotrichum, C. albicans, Oidiodendron dan Rhodotorula. C. albicans secara dominan teridentifikasi pada sampel bulu ayam di setiap ruang pengambilan contoh. Khamir ini juga diisolasi dari produk tepung bulu ayam. Pada contoh udara, bahan tambahan dan produk tepung bulu ayam adalah faktor pembeda populasi A. Niger yang diisolasi dari tiga sampel. Ruangan bukan merupakan faktor pembeda terhadap keragaman dan jumlah cendawan yang diisolasi dari contoh udara, bulu dan produksi tepung bulu ayam. Namun, jenis contoh pada ruang produksi merupakan faktor pembeda populasi A. niger yang diisolasi. Kualitas mikrobiologik dari hasil tepung bulu ayam dapat dipengaruhi oleh kualitas udara di ruang produksi. Kualitas mikrobiologik dari ruang pengumpulan dapat mempengaruhi kualitas ruang produksi secara statistik. Ruang pengumpulan dan ruang produksi yang berada pada gedung yang sama merupakan penyebab pengaruh tersebut
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Air contamination, Feather meal, Fungi contaminant

Judul: Keanekaragaman Cendawan Yang Diisolasi di Lokasi Perkandangan Ayam
Abstrak: The aim of this research was to identify the kind of fungi in chicken farm environment. Samples which examined in this study were air, feathers and litter taken in two different time periods. Analysis of variance of the population showed diversity of fungi in air and litter sample were came from different population The results showed that fungi that isolated from air sample were A. niger, A. flavus, A. fumigatus, Mucor, and Geotrichum. A. fumigatus population was higher than others in the air sample. A. niger, A. flavus, Candida, and Mucor isolated from feather samples. A. niger populations was higher than other in feather samples. A. niger, A. flavus, A. fumigatus, Candida, Geotrichum, and Mucor isolated from litter samples and A. niger population is higher than others. The level of fungi diversity in Henhouse 1 was higher than Henhouse 2. High population of contaminant fungi in the henhouse would increase the risk of mycoses. The existence of some fungi in chicken feathers, which provide the raw material for producing chicken feathers mealwill affect the quality of the chicken feathersmeal product
Keyword: environment., infection caused by fungi litter, fungi contamination, chicken feathers

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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