Judul: Pendugaan erosi, sedimen dan limpasan berbasis model hidrologi wepp dan SIG di Sub-DAS Cirius, DAS Cidanau, Erosion, sediment and runoff prediction based on WEPP hydrological model GIS at Ciriung sub-watershed, Cidanau watershed
Abstrak: Kerusakan DAS di Indonesia semakin bertambah seiring dengan pembukaan hutan, baik sebagai lahan pertanian maupun pemanfaatan hasil kayu.Usaha konservasi DAS telah memberikan dorongan untuk mengembangkan model pendugaan erosi, sedimen dan limpasan yang aplikatif dan sesuai kondisi di lapangan. Penelitian dilakukan di Sub-DAS Ciriung, DAS Cidanau, Serang, Banten.Tujuan utama dari penelitian adalah mengembangkan model hidrologi, mengkaji teknik pengendalian erosi, sedimen dan limpasan, serta merancang fungsi kawasan yang mendukung konservasi DAS., Watershed degradation in Indonesia has been increasing due to the deforestation, either for agricultural land or forest products exploitation. Efforts in watershed conservation among others have induced the development of prediction model for erosion, sediment, and run off that are applicable and suitable to field condition.
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Judul: Aplikasi Model Simulasi ANSWERS (Areal Nonpoint Source Watershed Environment Respon Simulation) untuk Menduga Erosi dan Sedimentasi di Sub DAS Ciliwung Hulu
Abstrak: Daerah Aliran Sungai (DAS) Ciliwung merupakan satu dari 62 DAS kritis di Indonesia, yang terbukti dari peristiwa banjir tahunan, erosi, sedimentasi serta pencemaran yang tinggi, rasio debit minimum dan debit maksimum cenderung meningkat. Saat ini pengalihgunaan lahan di daerah hulu DAS Ciliwung terjadi sangat pesat. Akibatnya laju erosi dan sedimentasi semakin hari semakin meningkat.
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Judul: Evaluation of Influenza Antibody Titers in Serum and Egg Yolk of Layers Vaccinated with Influenza Vaccines.
Abstrak: Influenza belongs to the Orthomyxoviridae family which causes upper and lower respiratory tract infection. The aim of this study was to evaluate influenza-A specific antibody titers from serum and egg yolk of hens vaccinated with quadrivalent influenza vaccines. Three Hy-line Brown layers were vaccinated with quadrivalent influenza type A and B inactivated vaccines. Vaccination was carried out three times at a dose of 0.25 ml/chicken via the intramuscular route. The first vaccination was carried out at 24 weeks of age, then boosters were performed at 28 and 32 weeks of age. Serum and egg yolk were collected every week for 20 weeks since the first vaccination. Influenza A H3N2 and H1N1 antibody titers were determined using hemagglutination-inhibition (HI) test and agar-gel-precipitation (AGP) test. Influenza-A H3N2 and H1N1 specific antibodies were detected in both serum and egg yolk from the first to twenty weeks after the initial vaccination. Highest HI geometric mean titer (GMT) of H1N1 antibody reached 26.67 HIU at nine weeks post first vaccination (p.f.v), while H3N2 antibody reached 26 HIU at six weeks p.f.v. Our result showed that influenza antibodies can be produced in layers using quadrivalent vaccines and layer chickens are able to produce equivalent antibody levels for each influenza subtype.
Keyword: antibody, egg yolk, influenza, layer chickens, serum