Judul: Maskulinisasi Belut Sawah Monopterus albus melalui penyuntikan 17a-metiltestosteron dan peningkatan suhu
Abstrak: Ricefield eel (Monopterus albus) is hermaphrodite protoginy fish with the sex change from female, interseks and male. This study aimed to stimulate of sex change to obtain male ricefield eel by injection 17α-metiltestosteron (MT) and increased temperature. The treatment is designed factorial with two treatments, 17α-methyltestosterone doses (0 and 50 mg/kg body weight) and temperature (room and 32 ° C). Each treatment consisted of 15 ricefield eel, with average body length 26,01±2,23 cm and weight of 13,67±4,31 g. Induced MT hormone with intramuscular method once dose every week as much as five weeks, whereas the induction temperature treatment as long as six weeks. The results treatment MT and in room water temperature (B) showed 50% male, 50% intersexes, and temperature at 32oC (D) showed 100% intersexes, whereas the treatment without MT added and temperature at 32 oC (C) showed 57,15% intersexes, 42,85% female, and then control treatment (A) showed 28,57% intersexes and 71,43% female. Induced MT 50 mg/kg body weight capable to direction male ricefield eel at the body length 24,6-26,2 cm.
Keyword: Bogor Agricultural University (IPB), male, temperature, 17α-metiltestosteron, Monopterus albus, ricefield eel

Judul: Induksi Maturasi Belut Sawah (Monopterus albus) Secara Hormonal
Abstrak: Rice field eel (Monopterus albus) fish, often there is a failure in the process of and spawning. Rice field hormones Pregnan Mare Serum Gonadotropin (PSMG), human chorionic gonadotropin (hCG) and antidopamine (AD). maturation and determine the status sex completely randomized design (RAL) with seven treatments and seven as: Controls (0.95% NaCl of fish, AD 0.01 mg/kg of fish, PMSG 20 IU/kg+AD 0.01 mg mg/kg weight of fish. Aquarium used as many seven pieces with size cm. The result is best hormone combination treatme with hormone concentrations of estradiol 0.17 to 4.36%; HSI values maturity level TKG IV pregnancy rate 100%; contained in PMSG stimulates an increase FSH, estradiol caused performance of the enzyme aromatase process faster for 4 weeks, look at increasing GSI, H maturity, fecundity, body weight gain conclusion of this study is the induction of maturation eel rice can be done with PMSG 20IU+AD 0.01 mg/kg with a length of 22±2 cm results are females (mature) Keywords: Rice field eel, maturation, PMSG, hCG, antidopamine SUMMARY PUTRA. Hormonal Induction maturation of Rice albus). Guided AGUS OMAN SUDRAJAT and NUR are hermaphroditic protogynous. In the female final gonadal maturation, ovulation eel with a total length of 22±2 cm by inject This study aimed to induce gonadal of rice field eel. This study uses a reaply NaCl), PMSG 20 IU/kg weight of fish, hCG 20 IU/kg weight /PMSG 20 IU/kg+hCG 10 IU/kg weight of fish, mg/kg weight of fish, and hCG 20 IU/kg of treatment PMSG and antidopamin estradiol-17β 235.2 to 35.43 pg/ml; GSI values 2.07 to 3.52%; egg diameter 0.48 to 3.07 mm; gonad G IV; fecundity 128 eggs; length 0 cm; weights ; and sex status all female. This result because estradiol-17β concentration ormance so that affects vitellogenesis HSI, egg diameter, gonad was observed and sexual status injection for four weeks. Sex status of rice field eel and weight of about 5 g until 12 g hormonal induction mature).
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Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf