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: Gambaran Histopatologi Hepatitis pada Kalong (Pteropus vampyrus)
Abstrak: The aim of this research was to find out an descrption of hepatitis in the large flying fox (Pteropus vampyrus). This research used seventeen livers samples of Pteropus vampyrus from Manado(North Sulawesi) and Ciamis (West Java). The necropsy procedure was performed and livers of Pteropus vampyrus were taken, examined for gross findings and histopathology. The results of observations indicated that three of the samples showed hepatitis; characterized by the presence of granulomatous inflammation. Inflammatory in those samples consisted of necrotic area, neutrophils, macrophages, lymphocytes, and fibrous tissue. Periodic Acid Schiff (PAS) staining was done on three samples and the results demonstrated negative to the existence of parasites and fungi. So the cause of granulomatous inflammaton in this study is still not spesific yet.
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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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