Judul: Perangsangan Pertumbuhan dengan Penyuntikan  Somatotropin pada Tikus Jantan Umur Prapubertas
Abstrak: Pertumbuhan hewan dikontrol oleh berbagai hormon, terutama somatotropin. Somatotropin berfungsi sebagai regulator fisiologis dalam tubuh dan pengaruhnya pada pertumbuhan sudah nyata dan berdampak pada banyak proses pertambahan jaringan selama pertumbuhan. Sasaran penelitian ini adalah pengaruh penyuntikan somatotropin pada pertumbuhan tikus jantan. Seratus enam puluh dua tikus jantan galur Sprague-Dawley (SD) berumur 2 minggu digunakan pada penelitian ini. Data dianalisis dengan rancangan tersarang dengan 2 faktor. Faktor pertama adalah dosis yang terdiri atas 3 level (0, 3, dan 9 mg/kg bobot badan/hari). Faktor kedua adalah periode penyuntikan yang tersarang di dalam faktor dosis dan terdiri atas 3 waktu (mulai penyuntikan : hari ke 1 – 14, hari ke 1 – 28, dan hari ke 15 – 28). Penelitian dilakukan dua tahap. Tahap pertama yang berlangsung selama 28 hari penyuntikan somatotropin yang dilanjutkan ke tahap kedua selama 28 hari tanpa penyuntikan somatotropin. Peubah yang diukur antara lain bobot badan (BB), konsumsi pakan, pertambahan bobot badan (PBB), efisiensi penggunaan pakan, laju pertumbuhan relatif (LPR), bobot karkas, kandungan kimiawi karkas (protein, lemak, mineral, dan glikogen), panjang tulang, dan kandungan kimiawi tulang (kalsium dan kolagen). Hasil penelitian menunjukkan bahwa selama periode penyuntikan somatotropin terjadi peningkatan bobot badan, konsumsi pakan, pertambahan bobot badan, efisiensi penggunaan pakan, laju pertumbuhan relatif, bobot karkas, kandungan kimiawi karkas (mineral dan glikogen), bobot organ dalam, panjang tulang, kandungan kimiawi tulang (kalsium dan kolagen), dan terjadi penurunan kandungan lemak karkas tanpa mempengaruhi kandungan protein karkas. Dua puluh delapan hari setelah penghentian penyuntikan somatotropin, pengaruh somatotropin tidak terlihat lagi pada bobot badan, konsumsi pakan, PBB, efisiensi penggunaan pakan, LPR, dan panjang tulang. Dapat disimpulkan bahwa penyuntikan somatotropin dapat meningkatkan penampilan pertumbuhan sedangkan setelah dihentikan penyuntikan tidak meningkatkan penampilan pertumbuhan tikus jantan.
Keyword: Somototropin, Growth performance

Judul: Suplementasi Somatotropin untuk Memperbaiki Tampilan Fisiologis Tikus Betina Usia Enam Bulan dan Satu Tahun.
Abstrak: As age increases, aging symptoms such as decrease of stamina, wrinkle of skin, osteoporosis, increase of body fat and menopause will appear. These symptoms are due to the decrease of somatotropin secretion which plays a significant role in cell proliferation. The objective of this study is to investigate the effects of somatotropin supplementation on physiological performaces of six-month and one-year old female rats. Forty eight female rats were assigned into a randomized block design with 4 factors. The first factor was age with 2 levels (6 months and 12 months). The second factor was somatotropin dosage with 2 levels (0 and 9 mg/kg body weight). The third factor was duration of injection with 2 levels (3 weeks and 6 weeks), and the fourth factor was sampling period with 2 levels (0 and 14 days after somatotropin termination). Parameters measured were body weight, total DNA and total RNA of ovary and uterus, plasma estrogen and progesteron levels, bone collagen and skin collagen consentrations. The results showed that somatotropin supplementation had significant effects on body weight, ovary weight, total cell of ovary, total cell of uterus, plasma estrogen and progesteron levels, bone and skin collagen concentrations. It is concluded that somatotropin improve physiological performances of aging female rats.
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Judul: Persamaan Korteweg-de Vries Orde Tinggi untuk Menggambarkan Gerak Gelombang Internal
Abstrak: The ocean can be considered of layers of fluid that each layer has a constant density. Internal waves are waves occur in the interface of every'two layers with different density. Because it occures underneath the surface of the ocean, it is invisible. One of internal waves is internal solitary waves. One of formulation that can describe intemal waves movement is KdV equation. KdV equation is derived from governing equations of ideal fluid in Lagrange formulation using asymptotic method. On this thesis, KdV equation is derived in higher order and then its solution is derived by using internal solitary waves assumption. An example of a two-layer fluid is a case will be used. By using Mathematica6 software, for this case will be obtained the coefficients in lower and higher order explicitly and the corresponding between coefficients and relative lower layer depths and fluid depths, the corresponding between coefficients and relative densities, and also observed the different between solitary waves in lower and higher order.
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