Judul: Gambaran histopatologi pankreas kalong (Pteropus vampyrus) di Indonesia
Abstrak: Penelitian ini bertujuan untuk mengetahui gambaran histopatologi dari Pteropus vampyrus lokal. Dalam penelitian ini, 12 sampel pankreas Pteropus vampyrus digunakan yang merupakan sumbangan dari penelitian bersama antara Indonesia dan Jepang. Sampel pankreas diawetkan dalam Buffer Neutral Formalin kemudian diproses dengan menggunakan parafin. Jaringan/tissue slides tersebut diwarnai dengan menggunakan Hematoksilin dan Eosin sebagai evaluasi histopatologi secara umum dan imunostaining menggunakan anti insulin antibodi untuk memeriksa populasi sel positif insulin. Hasilnya menggambarkan jumlah pankreas kalong yang ditemukan adalah 7.53±2.87 per lapang pandang. Penelitian ini menunjukkan jumlah Langerhans pada kalong dua kali lebih banyak dari Langerhans tikus. Tidak ada pengaruh hasil evaluasi histopatologi baik pada hati maupun pankreas, terhadap kadar insulin yang terdapat pada pankreas kalong.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Pteropus vampyrus, Fruit bats, Histopathology, Langerhans, Insulin cells

Judul: Studi kasus : gambaran histopatologi organ ginjal pada kalong di Gorontalo
Abstrak: Fruit bats were world wide distributed mammals including in Indonesia. This study used samples called Kalong Gorontalo (KG) of the kidney from three species of fruit bats (Acerodon celebensis, Dobsonia exoleta, and Pteropus hypomelanus) from Gorontalo, North Sulawesi. The aims of this study were to find out the histology overview and pathology condition from the kidney to know the pathogenesis of the disease that infected those fruit bats. Histological overview used Hematoxylin Eosin (HE) shows that the cell and tissue in all of the samples had some pathology condition such as : hydropic swelling, degeneration, necrosis, protein deposition in the tubulus lumen, and dilatation of tubulus lumen. Some of the samples that were KG 1, 4, 5, 6, 21, and 26 showed positive reaction with Periodic Acid Schiff (PAS), it means that there were glycogen deposition in kidney. In addition, sample KG 7 showed positive reaction PAS with budding cell inside that indicated a systemic mycosis.
Keyword: Acerodon celebensis, Dobsonia exoleta, fruit bats, kidney, Pteropus hypomelanus.

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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