Judul: Detection of Beta-Amyloid 42 as a Marker of Alzheimer's Disease Using the IPB In-house ELISA Kit
Abstrak: Protein amiloid beta 42 (Aß42) merupakan penanda biologis (biomarker) penyakit Alzheimer yang dapat dideteksi menggunakan kit ELISA. Penelitian ini bertujuan untuk mengetahui performa kit ELISA Aß42 inhouse di level serum dibandingkan dengan kit komersial. Penelitian ini dimaksudkan bermanfaat dalam mendeteksi dini penyakit Alzheimer dan pengembangan penelitian menggunakan kit ELISA inhouse IPB-PSSP. Penelitian ini menggunakan 18 sampel serum manusia yang dibagi menjadi 3 kelompok usia: kelompok 1 (20 – 30 tahun), kelompok 2 (30 – 40 tahun), dan kelompok 3 (> 40 tahun). Nilai OD antar kelompok dan antar kit dibandingkan rata-rata serta standar deviasinya. Hasil pengujian kit ELISA Aß42 inhouse memiliki performa yang mendekati kit ELISA komersial., Amyloid beta 42 (Aß42) protein is a biological marker (biomarker) of Alzheimer's disease that can be detected using an ELISA kit. This study aims to determine the performance of the in-house Aß42 ELISA kit at the serum level compared to the commercial kit. This research is intended to be beneficial for the early detection of Alzheimer's disease and for the development of research using the IPB-PSSP in-house ELISA kit. This study used 18 human serum samples divided into 3 age groups: group 1 (20-30 years), group 2 (30-40 years), and group 3 (> 40 years). The OD values between groups and between kits were compared using the average and standard deviation. The results of testing the in-house Aß42 ELISA kit show performance that is close to the commercial ELISA kit.
Keyword: alzheimer, ELISA

Judul: Study of Amyloidopathy on Mice Liver after Immunization of Amyloid Beta 42 (Aβ42) as a Marker of Alzheimer's Disease
Abstrak: Peptida amiloid beta 42 (Aβ42) dikenal sebagai biomarker dini penyakit Alzheimer. Antibodi Aβ42 menjadi bahan antibodi spesifik atau antibodi monoklonal yang dapat dijadikan kit diagnostik penyakit Alzheimer berbasis ELISA. Antibodi diproduksi di hewan mencit melalui teknik imunisasi amiloid sehingga didapatkan antibodi monoklonal dari organ limpa pada mencit. Studi ini dilakukan untuk mempelajari amyloidopathy pada organ hati mencit pascaimunisasi antibodi amiloid beta 42 (Aβ42) sebagai marka penyakit Alzheimer. Studi ini menggunakan 20 ekor mencit lalu dibagi menjadi dua kelompok. Kelompok yang diimunisasi dengan Aβ42 dan kelompok kontrol. Mencit perlakuan diberikan vaksin dengan titer 15.000pg/mL dan diinjeksikan 100l/ekor melalui rute subkutan. Pengamatan histopatologi organ hati menggunakan pewarnaan Hematoksilin Eosin. Temuan lesio dianalisis menggunakan analisis deskriptif dan semikuantitatif tipe ordinal. Hasil pengamatan menunjukkan bahwa terdapat lesio infiltrasi sel radang dan nekrosis pada mencit perlakuan. Hasil pengamatan studi ini diharapkan dapat melengkapi informasi terkait efek dari imunisasi Aβ42 terhadap organ hati mencit sebagai hewan model., Amyloid peptide beta 42 (Aβ42) is known as an early biomarker of Alzheimer's disease. Antibody Aβ42 is a specific antibody or a monoclonal antibody that can be used as an ELISA-based Alzheimer's disease diagnostic kit. Antibodies are produced in mice through the amyloid immunization technique; monoclonal antibodies will be obtained from the spleen organ in mice. This study was conducted to study amyloidopathy in the liver of mice after immunization with amyloid beta 42 (Aβ42) antibody as a marker of Alzheimer's disease. This study used 20 mice and divided them into two groups. The group immunized with Aβ42 and the control group. This study uses 15.000pg/ml vaccine titter and injected to 10 mice via the subcutaneous route with 100l/mice dose. Histopathological observations of liver organs using Haematoxylin Eosin staining and the lesion was then analysed using ordinal type descriptive and semi-quantitative analysis. The results showed that there were inflammatory cell infiltration lesions and necrosis in immunized mice. The results of this study are expected to provide information regarding the effects of Aβ42 immunization on the liver of mice as animal models.
Keyword: Alzherimer's disease, amyloidosis, hystopathology, liver, mice

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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