Judul: Induksi Pematangan Gonad Belut Sawah Monopterus albus Melalui Kombinasi Hormon dan Antidopamin
Abstrak: Rice field eel is one of the protogeneous hermaphrodite animals with high demand and so far the procurement for rice field eel was obtained from nature, that will lead to diminishing numbers. Therefore, breeding efforts should begin with providing parent mature gonads. This study used a measure of rice eel with weight 30.34 ± 5.34 g and 30.1 ± 2.16 cm long with the induction maturation gonads of eels rice is done by a combination of hormones PMSG (P) and antidopamin (AD) in which (A) control, (B) P 5 + 5 AD, (C) P 10 + 5 AD, (D) P 15 + 5 AD. Combination hormone 15 IU PMSG and 5 ppm antidopamin GSI eel fish increased 2.36% in the fifth week, whereas the highest HSI of 7.9% in the second week of treatment, pregnancy rate of 80% of eels treatment started in the third week of treatment until end of treatment, the highest SGR of 0.5% and gonad histology in the fifth week showed that the eel rice has reached a level IV gonad maturity, compared with a combination of PMSG treatment and lower doses antidopamin newly attained gonad maturity III, while the controls showed no occurrence changes in gonad maturity level. The results of this study indicated that a combination of PMSG and antidopamin hormone can increased the maturity of the gonad eel and eel rice to the size of 30.34 ± 5.34 g and 30.1 ± 2.16 cm long to females sexes. This technology can be applied as the initial development of semi-natural spawning in the field eel.
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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: Kerusakan bantalan rel kereta api di wilaya inspeksi 2 jalan dan bangunan perusahaan jawatan kereta api (pjka),cirebon
Abstrak: Kereta api merupakan salah satu sarana angkutan yang murah, cepat dan aman serta dapat mengangkut barang dalam jumlah besar. Kelancaran operasi sarana angkutan tersebut banyak ditentukan oleh kondisi jalan rel, termasuk kondisi bantalannya. Dalam hal ini bantalan rel kereta api dapat dibuat dari kayu, logam, atau beton. Namun demikian kayu merupakan bahan yang paling banyak digunakan sebagai pembuat bantalan rel kereta api di berbagai negara. Kenyataan menunjukkan bahwa kayu yang digunakan sebagai bantalan rel kereta api sering mengalami berbagai macam kerusakan yang menyebabkan bantalan tidak berfungsi lagi atau menurun fungsinya. Di Indonesia, informasi mengenai jenis dan tingkat kerusakan bantalan kayu masih sangat kurang, pada- hal informasi tersebut sangat penting sebagai dasar pertimbangan dalam rangka pemeliharaan jalan kereta api, agar umur pakainya (service life) lebih lama.
Keyword: bantalan rel