Judul: Gambaran hemogram domba garut yang diinfestasi larva Chrysomya bezziana dengan penambahan krim sirih merah
Abstrak: Antibakteri merupakan suatu bahan yang dapat digunakan untuk menghambat pertumbuhan bakteri ataupun membunuh bakteri. Antibakteri dapat bersumber langsung dari alam dan dapat dibuat secara semisintetis ataupun modifikasi molekul biosintetis. Tujuan penelitian ini adalah mengetahui potensi aktivitas antibakteri dari ekstrak n-heksan imago Attacus atlas terhadap Staphylococcus aureus dan Escherichia coli. Ekstraksi sampel dilakukan dengan metode maserasi menggunakan alat incubator shaker selama 72 jam pada suhu 37 dengan kecepatan 125 rpm. Kemudian filtrat dievaporasi menggunakan alat rotary evaporator pada suhu 60 dan tekanan 0.045 mPa selama 27 menit. Uji aktivitas antibakteri dilakukan dengan menggunakan metode difusi sumuran dan dibandingkan terhadap kontrol positif (antibiotik ciprofloxacin) dan kontrol negatif (n-heksan). Hasil uji antibakteri ekstrak menunjukkan median diameter zona hambat sebesar 6.00 mm pada isolat Staphylococcus aureus dan Escherichia coli. Berdasarkan hasil uji tersebut diketahui bahwa ekstrak etil asetat imago Attacus atlas tidak memiliki aktivitas antibakteri pada Staphylococcus aureus dan Escherichia coli.
Keyword: antibacterial, Attacus atlas, extract, imago, n-hexane

Judul: Uji Aktivitas Antibakteri Ekstrak N-heksan Imago Attacus atlas terhadap Staphylococcus aureus dan Escherichia coli.
Abstrak: Antibakteri merupakan suatu bahan yang dapat digunakan untuk menghambat pertumbuhan bakteri ataupun membunuh bakteri. Antibakteri dapat bersumber langsung dari alam dan dapat dibuat secara semisintetis ataupun modifikasi molekul biosintetis. Tujuan penelitian ini adalah mengetahui potensi aktivitas antibakteri dari ekstrak n-heksan imago Attacus atlas terhadap Staphylococcus aureus dan Escherichia coli. Ekstraksi sampel dilakukan dengan metode maserasi menggunakan alat incubator shaker selama 72 jam pada suhu 37 dengan kecepatan 125 rpm. Kemudian filtrat dievaporasi menggunakan alat rotary evaporator pada suhu 60 dan tekanan 0.045 mPa selama 27 menit. Uji aktivitas antibakteri dilakukan dengan menggunakan metode difusi sumuran dan dibandingkan terhadap kontrol positif (antibiotik ciprofloxacin) dan kontrol negatif (n-heksan). Hasil uji antibakteri ekstrak menunjukkan median diameter zona hambat sebesar 6.00 mm pada isolat Staphylococcus aureus dan Escherichia coli. Berdasarkan hasil uji tersebut diketahui bahwa ekstrak etil asetat imago Attacus atlas tidak memiliki aktivitas antibakteri pada Staphylococcus aureus dan Escherichia coli.
Keyword: antibakteri, Attacus atlas, ekstrak, imago, n-heksan

Judul: The Effects of Variance of Interest rate to Variance of Annuity Future Values
Abstrak: Time value of money is a concept that refers to the difference of the value of money due to time difference. The value of money for present time would not be the same as the value of money in the future. The value of money for present time is called as Present Value (PV) of the money and the value of money for future time is called Future Value (FV) of the money. Determination the value of money, for present and future time, depends on the time and rate of return. The value of money is determined by several factors such as inflation, fluctuation of interest rates, and government policy in securities and taxation. Due to fluctuation of the value of money we need a FV formulation, it is useful for knowing whether an investment can be profitable or not, and this information is useful also in budget analysis. Annuity is defined as a series of payments made for a specific period. The payment, fixed or varied, can be made at the beginning or at the end of the period. Annuity paid at the beginning of the period is called annuity-due and annuity paid at the end of the period is called immediate annuity-certain. The accumulated value of the annuity after few years later is called as a final value or a future value. Burnecki et al. (2003) have discussed about the FV of a fixed-rate annuity in which payments are made according to the arithmetic or geometric series. They have also examined FV for annuities in which payments are made according to arithmetic or geometric series with random rates of interest. This paper examines FV for annuity-due in which payments are made according to arithmetic or geometric series with interest rates as a random variable, which is normal distribution ,  . Future value formula is expressed in recursive form. FV for annuity-due which payments are made according to the arithmetic or geometric series with random rates of interest is calculated by theoretical way and simulation way. The random rates of interest is denoted as k k i  i  , where k i an independent random variable; i is a constant and k  is a random variable which has normal distribution ,  . By using the determined parameters, a sequence of random rates of interest are generated for theoretical calculation. Meanwhile for the simulation, the random rates of interest is generated 1000 times for the simulation. The generated data give mean value, variance, and standard deviation. Moreover, error of mean value, variance, and standard deviation from the theoretical and simulation results are calculated. Error calculation uses Symmetric Mean Absolute Percentage Error (SMAPE). The smaller the value of SMAPE is the more accurate the simulation. The interest rate variances are varied from 0.000036 to 0.0001 to study the relationship between variance of rates of interest and variance of future value. The theoretical and simulation results show that when the variance of random rates of interest increases, then the variance of FV increases linearly. FV of the annuity-due in
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