Judul: Induction of Gonad Maturation in Male Pearl Catfish (Clarias gariepinus) Using the Blood Plasma of Male Sheep
Abstrak: Pearl catfish (Clarias gariepinus) is one type of freshwater consumption fish with high economic value and is one of the main fishery commodities in Indonesia. One of the obstacles in catfish hatcheries is the availability of seeds thatdepend on spawning activities so that good broodstock quality is also needed. Thisstudy aims to test the induction of male catfish gonad maturation using ram blood plasma as a new alternative gonad maturation hormone. This study used complete randomized design consisting of three treatments with 15 individual replicates each.The method of hormone administration to be used is the intramuscular injection method. The results showed that the P1.0 treatment was the best treatment in increasing gonad maturation. The P1.0 treatment experienced the highest increase of 2.8 times (P < 0.05) when compared to the P0.0 treatment at the end of maintenance, while the P0.5 treatment experienced an increase of 1.6 times (P>0.05) when compared to the P0.0 treatment at the end of maintenance. The results showed that induction of gonadal maturation using ram blood plasma provedto be able to increase gonadal maturity in male catfish in 28 days of maintenance.
Keyword: Clarias gariepinus, gonads, sheep blood, spawning

Judul: Induction of Ovulation and Spawning in Catfish (Pangasianodon hypopthalmus) with Hormonal Manipulation
Abstrak: Striped catfish is a species introduced from Thailand, has economically important because the meat is preferred by Indonesian society. Fish farming is growing rapidly, thus increasing the need for seed. Spawning of these fish can only be done by artificial spawning by stripping, which can lead to decreased quality of broodstock, gametes and seeds. The purposeof this study is to hormonally induce ovulation and spawning of seminatural for catfish and evaluate the effectiveness and efficiency of the use of hormone LHRH, antidopamin (AD), aromatase inhibitors (AI), prostaglandin(PGF2a), oxytocin and ovaprim to induce ovulation and spawning on this fish. Mature fish (1.5 - 3.5 kg per fish), was treated by hormonal injection with: LHRHa + AI (Spawnprime 1); AD + AI (Spawnprime 2); LHRHa + AD + AI + PGF2α (Spawnprime 3); LHRHa + AD + AI + PGF2α + oxytocin (Spawnprime 4); LHRHa + AD + oxytocin (Spawnprime 5); LHRHa + AD + PGF2α (spawnprime 6), AI + oxytocin (spawnprime 7), AI + PGF2α (spawnprime 8); ovaprim, and NaCl (0.90%). The results showed that spawnprime has faster latency period (6-8 hours) compared ovaprim (12 hours). spawnprime 1, 2, 5, and 6 can be spawned artificially by stipping, while spawnprime 3,4,7 and 8 naturally. The best results were shown by spawnprime 4 which causes ovulation rate of 100%. The latency period in spawnprime 4 is 6 hours and 33 minutes, the amount of egg in ovulation time is 195.000 ± 41079.19 eggs, the fertilization rate is 91.87% ± 3.03, the hatching rate is 92.33% ± 5.86, the survival rate of larvae 93.91% ± 2.96, diameter egg is 1.05 ± 0.04 mm and concentrations of estradiol 0.7 pg / ml. spawnprime can induced for ovulation and ntural spawning (without stripping) on stripped catfish. Spawnprime can be used as an alternative in the artificial propagation.
Keyword: catfish (Pangasianodon hypopthalmus), ovaprim, spawnprime

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