Judul: Deteksi antibodi antidiare (Escherichia coli dan Salmonella Enteritidis) dan anti flu burung (H5N1) dari kuning telur ayam Isa Brown dengan teknik imunodifusi dan uji hambat hemaglitinasi
Abstrak: Penelitian ini dilakukan untuk mengetahui keberadaan antibodi (imunoglobulin Y) spesifik Escherichia coli dan Salmonella Enteritidis dan flu burung (H5N1) dari kuning telur ayam ISA Brown dengan menggunakan metode Imunodifusi Agar Gel Precipitation Test (AGPT) dan uji Hemaglutinasi Inhibisi. Antibodi yang diuji dilakukan dengan pengenceran sederhana/segar kuning telur ayam yang telah divaksinasi antidiare dan vaksin anti flu burung. Keberadaan antibodi antidiare pada kuning telur dideteksi dengan metode Agar Gel Precipitation Test (AGPT), sedangkan untuk antibodi anti flu burung digunakan uji Hemaglutinasi Inhibisi. Hasil penelitian ini menunjukan bahwa terdapat antibodi spesifik untuk Escherichia coli, Salmonella Enteritidis dan H5N1 pada kuning telur. Kesimpulan dari penelitian ini bahwa ayam ISA Brown mampu memproduksi antibodi spesifik Escherichia coli, Salmonella Enteritidis dan H5N1.
Keyword: Dyspnea, Tachypnea, Hemorrhage, Pneumothorax, Bogor Agricultural University

Judul: Deteksi Keberadaan Antibodi Anti Diare (Escherichia coli dan Salmonella Enteritidis) Dan Anti Flu Burung (H5N1) Pada Kuning Telur Ayam Isa Brown Yang Diberi Perlakuan Pemanasan Bertingkat
Abstrak: This study was aimed to detect the existence of antibodies (immunoglobulin Y) specific to Escherichia coli, Salmonella Enteritidis, and Avian influenza (H5N1) in eggs after heating/boiling process. The treatment is by heating or boiling the whole eggs complete with shells at a temperature of 60°C, 70°C, 80°C, 90°C and 100°C for 5 minutes. The Eggs were tested that containing antibodies of anti-diarrhea and anti-avian influenza. This research used Agar Gel Precipitation Test (AGPT) method to detect antibodies of anti-diarrhea and hemagglutination inhibition (HI) test to detect antibodies of avian influenza. The results showed that the presence of antibodies (IgY) can still be detected by using AGPT and HI method in the eggs which be heated at 60°C, 70°C and 80°C for 5 minutes. Antibodies specific for Escherichia coli, Salmonella Enteritidis, and avian influenza (H5N1) could survive in the eggs complete with eggshells which be heated in the range of temperature 60–80°C. While on heating 90°C and 100°C has not detected the presence of antibodies specific because antibodies which is consist of protein was denatured. It could be concluded that the higher of egg heating temperature, IgY biological activity were decrease.
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Judul: Bifurkasi Hopf pada Model Siklus Bisnis Kaldor Kalecki tanpa dan dengan Waktu Tunda
Abstrak: Business cycle model is one of dynamical system models in economic. One of the business cycles model is Kaldor-Kalecki model. Kaldor-Kalecki business cycle model that is written in delayed defferential equations, is a business cycle model that involves gross product and capital stock of a company. In this paper Kaldor-Kalecki business cycle model is analyzed using both nondelay and delay in time of capital stock. By Taylor expansion for the time delayed model, an analysis of stability around the fixed points has been done. Furthermore, by using Hopf bifurcation theorem, it can be shown that there exists periodic orbits and limit cycle. In the nondelayed model, changing the parameter of goods market could lead to the occurrence of Hopf bifurcation and the existence of limit cycle. Similarly, for the delayed model, it has been shown that changing the time delay parameter may result in the occurrence of Hopf bifurcation and limit cycle.
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