Judul: Studi kemampuan vaksin aktif ND-IB: pembentuk kekebalan dan perlindungan terhadap paparan virus ib pada ayam pedaging
Abstrak: Objective of the study is to measure the antibody titer, clinical sign, and post mortal lesion of broilers vaccinated with Newcastle Disease-Infectious Bronchitis (ND-IB) live vaccine (LaSota H-120) and challenge with Infectious Bronchitis virus (IBV) field isolates. As much as 100 DOCs were use in this study. The maternal antibody derivates were taken from 20 broilers on the 1st day of experiment. The rest of the broilers divided into 4 groups (K1, K2, K3, and K4). Each group consisted 20 broilers. Group K1 and K2 were unvaccinated. Group K3 and K4 were vaccinated on the 2nd day according to the manufacturer procedure. Blood samples from unvaccinated and vaccinated group were taken on 7th, 14th, and 22nd day. Antibody titer was measured by using enzyme linked immunosorbent assay (ELISA). Challenge was carried out on 14th day (12th day post vaccination) to group K2 and K4. The result showed that chickens have high maternal antibody titer. The combination of intranasal and oral vaccination was not able to produced protective antibody against IB. Vaccination was able to reduced lethargy sign and cloudy airsacs. The clinical signs and post mortal lesions were more severe on K2 group than K4 group.
Keyword: broiler, ELISA, Infectious Bronchitis, LaSota H-120, vaccine

Judul: Pengaruh Vaksin Aktif Newcastele Disease-Infectious Bronchitis Terhadap Performance Ayam Pedaging
Abstrak: This research aimed to investigate the performance of broiler chicken vaccinated with the vaccine ND-IB (LaSota H-120). As much as 80 broiler chickens were used in this investigation and were divided into two groups e.i vaccinated and unvaccinated group. Each group consisted of 40 chickens. On day two, the vaccinated group were administrade the ND-IB vaccine (LaSote H-120). On the 14th day, each group were divided into three subgroups. The vaccinated chickens were devided in to 3 groups e.i K1, K2 and K3, whereas the unvaccinated group became group K4, K5 and K6. Groups K1 and K4 were unchallenged groups, whereas group K2 and K5 were challenged with ND virus and group K3 and K6 were challenged with IB virus. Every day, food consumption was measured and the body weight were measured every week. The result of this investigation indicated that the vaccinnation had no effect on weight gain and the vaccination wasn’t optimum in protecting the chickens against ND virus. The food convertion ratio of the vaccinated group of broilers were higher compared to the unvaccinated ones. The IP of vaccinated chickens were unsignificant different with unvaccinated groups.
Keyword: vaccine, LaSota H-120, performance, FCR, broiler chickens

Judul: : Persamaan Tunggal sebagai Representasi Kurva Komposit
Abstrak: A mathematical method is introduced to represent a composite curve based on an extension of analytic geometry. The representation is given either with a single equation or with two equations, in the case of parametric representation. This method permits the representation of composite curves in similar manner to the conventional representation of non-composite curves. Some mathematical tools, including Heaviside unit step function and periodizer function, are used in the establishment of a single equation. In this paper, regular equations of regular and irregular polygon, as well as composite curves of two dimensions, are implemented using a computer algebraic system, Mathematica.
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