Judul: Kondisi Sanitasi Peralatan dan Air pada Tahapan Produksi Keju Melalui Pengujian Jumlah Total Mikroorganisme dan Koliform
Abstrak: Equipment and water sanitation is very important in cheese industry. Poor sanitation of the equipments and water can contaminate the product, which can affect the safety and quality of the product. The study was aimed to determine the number of total microorganisms and coliforms from equipments and water which are used by the cheese production. Samples were consisted of 18 equipments, water and solution of salt water which was taken every week for five weeks. Total plate count method (pour plate method) was used to detect the total of microorganisms and coliforms, but the detection of coliform in the water was using the most probable number method. The highest number of total microorganisms and coliforms in separation process was found in separator bowl (85679.4 ± 143127.6 cfu/cm2 and 7564.1 ± 1490.9 cfu/cm2). In the process of pasteurization and formation of cheese curd, the highest number of total microorganisms and coliforms were found in a bucket of hot water (54096.6 ± 76801.7 cfu/cm2 and 12950.0 ± 17726.1 cfu/cm2). The pressing and salting process showed that the highest number of total of microorganisms (20722.0 ± 30613.7 cfu/cm2) and coliforms (2881.7 ± 4875.3 cfu/cm2) were found in cheese basket. During the ripening process, the highest number of total microorganisms was found in the coating tub (18150.0 ± 33448.5 cfu/cm2), whereas the highest number of coliforms was found in the cheese ripening rack (2728.7 ± 4908.8 cfu/cm2). Solution of salt water had the highest total number of microorganisms and coliforms (45123.6 ± 88988.1 cfu/ml and 11.0 ± 0.0 MPN/ml). It is very important to keep monitoring the total number of microorganisms and coliforms found in water and equipments used during the process of cheese production since it could be the sources of pathogen contamination to the food which may cause foodborne illness.
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Judul: Kualitas Mikrobiologik pada Keju Gouda
Abstrak: The aim of this study was to observe the total number of microorganism and coliforms in Gouda cheese. Samples were taken every week for three consecutive weeks. As many as 10 samples of each Gouda cheese (Gouda young, middle, and old) were examinated using plate count method (pour plate method). The data was analyzed with t-student and Duncan test to compare the total number of microorganism and coliforms. The result showed that Gouda old cheese has the highest average number of total microorganism (1.4x108 cfu/gram). There was not any significant difference in the total number of microorganism between Gouda young cheese and Gouda middle cheese. The significant (p<0.05) difference in the total number of microorganism was showed with Gouda young cheese and Gouda old cheese; Gouda middle cheese and Gouda old cheese. The highest average number of coliform was found in Gouda young cheese (4.3x105 cfu/gram). There was not any significant difference in the total number of coliforms among all the three types of Gouda cheese (p>0.05). The presence of coliforms in Gouda cheese indicated any contamination during the process and reduced the quality.
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Judul: Metode Binomial untuk Menentukan Harga Opsi Call Indonesia  dan Strategi Lindung Nilainya
Abstrak: Opsi merupakan suatu kontrak antara seorang pembeli dan seorang penjual yang memberikan hak kepada pembeli (tetapi bukan kewajiban) untuk menjual atau membeli sesuatu pada waktu tertentu pada tingkat harga tertentu yang disepakati pada saat ini. Suatu opsi untuk membeli sesuatu disebut call; sedangkan suatu opsi untuk menjual sesuatu disebut put. Seseorang yang menerbitkan suatu opsi disebut writer. Untuk memperoleh opsi, pemegang opsi membayar premi kepada writer. Opsi dapat dieksekusi sebelum waktu jatuh tempo (expiration date) yang disebut eksekusi lebih awal (early exercise). Opsi juga dapat dijual kapanpun sebelum jatuh tempo.
Keyword: Metode Binomial, Monte Carlo, opsi Indonesia, nilai opsi call, strategi hedging