Judul: Total Mikrob dan Koliform pada Kran Air Kamar Mandi, Wastafel, dan Musholla di Fakultas Kedokteran Hewan Institut Pertanian Bogor.
Abstrak: Cemaran mikrob pada kran air berasal dari udara, paparan kulit tangan, dan sisa air. Selain itu terdapat beberapa faktor yang dapat meningkatkan tingkat cemaran mikrob. Penelitian ini bertujuan mengidentifikasi total mikrob dan koliform pada kran air kamar mandi, wastafel, dan musholla di Fakultas Kedokteran Hewan Institut Pertanian Bogor. Digunakan 126 sampel swab kran air yang terdiri dari 63 sampel swab kran air sebelum pemakaian dan 63 sampel swab kran air sesudah pemakaian. Dilakukan pemeriksaan sampel terhadap total plate counts dan koliform menggunakan metode hitung cawan. Hasil penelitian menunjukkan bahwa rataan total mikrob dan koliform pada kran air kamar mandi, wastafel, dan musholla sesudah pemakaian 535 943.40 ± 1 607 830.19 cfu dan 1 394.91 ± 577.80 cfu memiliki jumlah lebih tinggi dibandingkan dengan sebelum pemakaian 345 724.48 ± 254 931.27 cfu dan 1 210.06 ± 597.09 cfu, tetapi tidak ada perbedaan yang nyata (p>0.05).
Keyword: koliform, swab kran air, total mikrob

Judul: Total Mikrob dan Koliform dalam Air dan Limbah Cair Setelah Pengolahan di Rumah Potong Hewan Ruminansia Bubulak Kota Bogor
Abstrak: Penelitian ini bertujuan mengidentifikasi total mikrob dan koliform dalam air dan limbah cair setelah pengolahan di lingkungan Rumah Potong Hewan Ruminansia Bubulak Kota Bogor. Penelitian ini dilakukan dengan mengambil sampel air sumber air, air minum di kandang penampungan, dan limbah cair setelah pengolahan dengan pengulangan sebanyak tiga kali. Pengujian Sampel dilakukan dengan metode hitungan cawan dengan cara tuang untuk pemeriksaan total mikrob dan koliform. Hasil penelitian menunjukkan bahwa rataan total mikrob dalam sumber air, air minum di kandang penampungan, dan limbah cair setelah pengolahan secara berurutan yaitu 17 333.3±3 214.6 cfu/ml, 147 000±32 511.6 cfu/ml, dan 39 366.7±26 071.1 cfu/ml. Rataan total koliform dalam sumber air, air minum di kandang penampungan, dan limbah cair setelah pengolahan secara berurutan yaitu, 187.0±49.6 cfu/ml, 230.0±65.6 cfu/ml, dan 8 333.3±850.5 cfu/ml. Rataan total mikrob dan koliform dalam air dan limbah cair setelah pengolahan di lingkungan Rumah Potong Hewan Ruminansia Bubulak Kota Bogor lebih tinggi dari standar yang dipersyaratkan.
Keyword: air, koliform, limbah cair, rumah potong hewan ruminansia

Judul: Pemodelan Nilai Opsi Tipe Eropa
Abstrak: Option is the right to sell or buy a specified quantity of some underlying asset by paying a specified exercise price, on or before an expiration date. There are two basic types of options, calls and puts. A call option is the right to buy and a put option is the right to sell the underlying asset. There are two types of options according to its execution time, i.e. American and European options. American options can be exercised at any time the holder wishes until the expiration date, while European options can only be exercised on the expiration date. Modelling of option price usually is done analytically by determining solution of differential equation that is satisfied by the price of derivative asset, known as Black-Scholes equation. Because option price is a reflection of present value of expectation of difference between the exercise price and the stock price at expiration date, so it is necessary to study the option price through the concept of present value, as an alternative way to model the option price. The result of this study shows that modelling of option price using differential equation method and present value approach give the same option price. Furthermore the results of ilustration give informations about the relation of the option price with its parameters as follow: First, increase in the current stock price causes the call option price also to increase, while the put option price, on the contrary, will decrease. Second, increase in the exercise price causes the call option price to decrease, while the put option price will increase. Third, the longer the expiration time the call option price will be higher, while the put option price doesn’t have the same tendency, but it depends on other parameters. Fourth, increase in the interest rate causes the call option price to increase, while the put option price will decrease. Finally, increase in the volatility causes the price of both call option and put option will increase.
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