Judul: Gambaran Histopatologi Hati Mencit Setelah Pemberian Suspensi Daging Buah Kepel (Stelechocarpus burahol) Secara Intragastrik Selama 14 Hari
Abstrak: The aim of this study was to examine the effect of kepel (Stelechocarpus burahol) to the mice hepatocytes. Thirty male mice of 4 week aged were divided into three groups; control group was treated by aquadest, dose 1x group was treated by 2.6 mg/g BW/day kepel powder (0,5 ml kepel suspension/day) and dose 5x group was treated by 13 mg/g BW/day kepel powder (1.0 ml kepel suspension/day). The treatment was intragastrically for 14 days. The mice were euthanized and then followed by the liver collection for histopathology processed. The histopathlogical examination of liver showed hydropic degeneration, apoptosis and extramedullary hematopoietic observed on mice hepatocytes.The ANOVA analysis showed that kepel caused increase significantly (p<0,05) of hydropic degeneration and decrease significantly (p<0,05) of apoptosis of mice hepatocytes.
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Judul: Potency of Kepel (Stelechocarpus burahol) Leaf Extract on Reducing Ammount of Ammonia, Trimethylamine, and Phenol in Mice (Mus musculus) Faeces.
Abstrak: Bau yang berasal dari ekskreta hewan dalam pemeliharaan hewan coba dapat menimbulkan masalah kesehatan bagi manusia maupun hewan coba. Bau tersebut dapat dikurangi dengan penggunaan deodoran oral. Penelitian ini bertujuan untuk mengetahui efek ekstrak daun kepel (Stelechocarpus burahol) terhadap kadar amonia, trimetilamin, dan fenol dalam feses mencit. Mencit diberi ekstrak daun kepel dengan dosis 2,6 mg/g BB per oral selama tujuh hari. Kadar amonia, trimetilamin, dan fenol dalam feses mencit diperiksa pada hari sebelum pencekokan, setelah pencekokan hari ketiga, dan setelah pencekokan hari ketujuh. Kadar amonia dan trimetilamin diukur dengan metode titrasi, sedangkan kadar fenol diukur dengan metode spektrofotometri. Data yang didapat dianalisis menggunakan uji T-student. Hasil menunjukkan bahwa kadar fenol dalam feses mencit menurun secara signifikan setelah tujuh hari, sedangkan kadar amonia dan trimetilamin tidak mengalami penurunan yang signifikan.
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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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