Judul: Purifikasi Dan Karakterisasi Imunoglobulin Y (IgY) Pada Telur Ayam Kampung
Abstrak: The objective of this research was to purified and characterized yolk immunoglobulin (IgY) from Indonesian native chicken eggs. Fourty eggs were collected from Cibanteng, Ciampea, Cinangneng, and Darmaga. IgY from egg yolk were puri$ed with Water Soluble Fraction (WSF) method combinated by 12% PEG 6000 and 40% Amonium sulpha methodt. IgY molecular weight was established by SDS-PAGE and the concentration was determinated by UV specfrophotometer. The result show that average IgY concentration from native chicken eggs was 7.86 mngml. Molecular weight of native chicken IgY was 180 and I70 kDa..
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Judul: Influenza Specific Immunoglobulin Y Purification from Egg Yolk with Sodium Chloride Precipitation Method
Abstrak: Imunoglobulin Yolk (IgY) yang terdapat dalam kuning telur telah banyak dimanfaatkan untuk imunoterapi dan imunodiagnostik. Salah satu kendala dalam pemurnian IgY dari kuning telur adalah pemisahan Ig dengan lemak, sehingga teknik pemurnian Ig selalu berkembang. Penelitian ini bertujuan untuk melakukan pemurnian IgY dari kuning telur dengan metode pengendapan menggunakan sodium chloride (NaCl) serta melakukan karakterisasi IgY spesifik influenza. Sodium chloride dipilih karena bahan kimia ini relatif murah, ramah lingkungan, dan tidak merusak imunoaktivitas IgY. Kuning telur yang digunakan dalam penelitian ini berasal dari telur ayam layer yang divaksinasi dengan vaksin influenza Flubio® yang berisi virus Influenza A/H3N2, A/H1N1 dan B/Washington. Pemurnian IgY hanya dilakukan pada kuning telur yang mengandung antibodi spesifik influenza. Deteksi keberadaan antibodi spesifik influenza ditentukan dengan uji agar gel presipitasi (AGP) dan metode enzyme linked immunosorbent assay (ELISA). Konsentrasi IgY hasil pemurnian dihitung dengan spektrofotometer dan karakterisasi protein dilakukan dengan metode Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis (SDS-PAGE). Konsentrasi protein dari hasil pemurnian IgY memiliki nilai rata – rata 50,403 mg/mL. Hasil SDS-PAGE menunjukkan enam pita protein, yaitu struktur IgY utuh (174,63 kDa), Apoprotein-LDL (129,77 kDa), rantai berat IgY (66,54 kDa), Fab ( 47,65 kDa), rantai ringan IgY (21,85 kDa), dan β-livetin (36,74 kDa). IgY hasil pemurnian masih dapat berikatan dengan antigen influenza berdasarkan uji ELISA. Hasil penelitian ini menunjukkan bahwa pemurnian IgY menggunakan metode pengendapan NaCl dapat memurnikan IgY dengan struktur utuh, meskipun masih ada dua protein tidak spesifik hasil pemurnian. IgY yang dapat berikatan dengan antigen influenza mengindikasikan prospek pemanfaatannya untuk pencegahan influenza dan imunodiagnostik., Yolk immunoglobulin (IgY) contained in egg yolk has been widely used for immunotherapy and immunodiagnostics. One of the obstacles in IgY purification from egg yolk is separating Ig from fat, so that IgY purification techniques are always developing. This study aimed to purify IgY from egg yolk using sodium chloride (NaCl) precipitation method and to characterize influenza-specific IgY. Sodium chloride was chosen because this chemical is relatively unexpensive, environmentally friendly, and does not impair IgY immunoactivity. The egg yolks used in this study were collected from layer eggs vaccinated with the Flubio® influenza vaccine, which contains the Influenza A/H3N2, A/H1N1 and B/Washington viruses. IgY purification was only carried out on egg yolks containing influenza specific antibodies. The presence of influenza-specific antibodies was determined by the agar gel precipitation (AGP) test and the enzyme linked immunosorbent assay (ELISA) method. The purified IgY concentration was determined using spectrophotometer, and protein characterization was performed using the Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis (SDS-PAGE) method. Protein concentration from purification has a mean value of 50,403 mg/mL . SDS-PAGE result showed six protein bands, namely intact IgY structure (174,63 kDa), Apoprotein-LDL (129,77 kDa), IgY heavy chain (66,54 kDa), Fab (47,65 kDa), IgY light chain (21,85 kDa), and β-livetin (36,74 kDa). The purified IgY still able to bind with influenza antigen based on the ELISA test. The results of this study indicate that purification of IgY using the NaCl precipitation method can purify IgY with intact structure, although there are still two unspecific proteins in the purification results. The resulting IgY can bind to influenza antigens indicating the
Keyword: Immunoglobulin Y, influenza, egg yolk, purification, sodium chloride

Judul: Penyelesaian Stacker Crane Problem dengan Algoritme Largearcs dan Smallarcs
Abstrak: In graph theory, the Rural Postman Problem (RPP) aims to determine the shortest route with minimum cost, in which only certain edges or arcs are necessarily traversed. One type of RPP is Stacker Crane Problem (SCP) which deals with a mixed graph but only arcs are necessarily traversed. SCP can be solved by using two heuristic algorithms, i.e. Largearcs and Smallarcs algorithms, which include other algorithms in their steps, such as: Dijkstra algorithm to determine shortest route, Hungaria method to determine minimum bipartite matching, Prim algorithm to determine minimum spanning tree, and van Aardenne-Ehrenfest & de-Bruijn algorithm and Fleury algorithm to determine Euler circuits. The shortest Euler circuit resulted from two heuristic algorithms can be used to find a solution of SCP. The application of SCP is illustrated in establishing the minimum distance route of catering delivery.
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