Judul: Accumulation of Abdominal Fat in Rats Given High Cholesterol Diet, Black Glutern Emping, and Dadih
Abstrak: Akumulasi lemak abdomen merupakan salah satu faktor risiko munculnya sindrom metabolik, seperti obesitas. Penelitian ini bertujuan untuk mengukur dan membandingkan tingkat konsumsi pakan, bobot badan, dan perlemakan abdomen pada tikus yang diberi pakan tinggi kolesterol dan ‘emping dadih’. Penelitian ini menggunakan 15 ekor tikus yang dibagi menjadi 3 kelompok perlakuan yaitu kelompok pakan standar (A), kelompok pakan standar, dan kolesterol (B), kelompok pakan standar, kolesterol, dan ‘emping dadih’ (C). Perlakuan ini dilaksanakan selama 5 minggu. Hasil penelitian menunjukkan bahwa pemberian kolesterol dan ‘emping dadih’ tidak berpengaruh terhadap konsumsi pakan dan bobot badan (P > 0,05). Penelitian ini menunjukkan peningkatan indeks lemak yang sangat signifikan pada kelompok C dibandingkan kelompok pakan standar (A) (P < 0,01). Penelitian ini menyimpulkan bahwa pemberian kolesterol dan ‘emping dadih’ berpotensi meningkatkan penumpukan lemak perut pada model tikus., Abdominal fat accumulation is a risk factor for metabolic syndromes, such as obesity. The main goal of this study was to measure and compare consumption rate, body weight and abdominal fat in rats fed high cholesterol dan ‘emping dadih’. This study used 15 Sprague dawley rats divided into 3 treatment groups: the standard feed group (A), the standard feed and cholesterol group (B), the standard feed, cholesterol and ‘emping dadih’ group (C). The treatment was carried out for 5 weeks. Result showed that giving cholesterol and emping dadih had no effect on feed consumption and body weight (P > 0,05). This study showed a very significant increase on the fat index in C group than standard feed group (A) (P < 0,01). This study concluded that giving cholesterol and emping dadih has the potential increasing the accumulation of abdominal fat in the rat model.
Keyword: bobot badan, dadih, emping ketan hitam, indeks lemak, kolesterol

Judul: Efficacy of Dadih and Black Glutinous Rice as an Cholesterol Lowering Alternative (Antihypercholesterolemia) in Hypercholesterolemic Rats Model
Abstrak: Hiperkolesterolemia merupakan faktor resiko penyakit kardiovaskular seperti aterosklerosis. Penelitian ini bertujuan menganalisis kadar total kolesterol, trigliserida, High Density Lipoprotein (HDL), dan Low Density Lipoprotein (LDL) dalam darah, serta kolesterol organ hati pada tikus hiperkolesterolemia yang diberi dadih dan ketan hitam (emping-dadih) dibandingkan dengan obat atorvastatin. Penelitian ini menggunakan 10 ekor tikus putih yang dibagi menjadi dua kelompok perlakuan, yaitu kelompok “emping-dadih” (ED) dan atorvastatin (AT). Penelitian dilaksanakan 9 minggu mencakup 5 minggu pertama diberikan diet kolesterol 1%, dan 4 minggu terakhir kelompok ED diberikan “emping-dadih” serta kelompok AT diberikan atorvastatin. Berdasarkan studi ini dapat disimpulkan bahwa “emping-dadih” dengan dosis tertentu mempunyai kemampuan yang sama dengan atorvastatin dalam menurunkan kadar kolesterol total dan LDL. Keduanya tidak memiliki efek berbeda terhadap kadar HDL. “Emping-dadih” berpotensi menaikkan kadar trigliserida walaupun dalam studi ini masih dalam rentang normal. “Emping-dadih” juga mampu menjaga kadar kolesterol hati tikus sama seperti kelompok yang diberi atorvastatin., Hypercholesterolemia is a risk factor for cardiovascular diseases such as atherosclerosis. This study aimed to analyze the levels of total cholesterol, triglycerides, High Density Lipoprotein (HDL), and Low Density Lipoprotein (LDL) in the blood, as well as liver cholesterol in hypercholesterolemic rats given dadih and black glutinous rice (emping-dadih) compared to atorvastatin. This study used 10 white rats divided into two treatment groups, i.e., the group treated with “emping-dadih” (ED) and the group treated with atorvastatin (AT). This study was conducted for 9 weeks. The first 5 weeks, all groups were given 1% cholesterol diet, and the last 4 weeks, the ED group was given emping dadih, and AT group was given atorvastatin. Based on this study, “emping dadih” can be concluded that “emping-dadih” with a certain dose has the same ability as atorvastatin in reducing total and LDL cholesterol levels. Both also have no different effect on HDL levels. “Emping dadih” has a potential to raise triglyceride levels even though in this study it is still within the normal range. “Emping-dadih” also maintained liver cholesterol levels the same as the atorvastatin rat group with no noticeable difference.
Keyword: black glutinous rice, dadih, hypercholesterolemia, LDL, Rat

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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