Judul: Success Rate of Fixed Time Artificial Insemination  Using Liquid Semen in Sheep at Mahir Farm Bogor
Abstrak: This study aims to determine the effectiveness of the hormone prostaglandin (PGF2α) on the estrous response of sheep and the percentage of pregnancies in sheep mated through artificial insemination with liquid semen after estrous synchronization. Estrus synchronization was carried out by repeated injections within 11 days using the hormone prostaglandin F2α as much as 0.5 ml intravaginally. Lambs were mated 68-72 hours after the second synchronization. Estrus response was 80% or 44 out of 55 sheep. The percentage of pregnancy of all sheep synchronized with estrus was 70,9% or 39 out of 55 sheep. It can be concluded that the use of 0.5 ml prostaglandin hormone is quite effective for estrus synchronization and the artificial insemination method at fixed time can be applied as an effective breeding method in sheep farming., Penelitian ini bertujuan untuk mengetahui efektifitas hormon prostaglandin (PGF2α) terhadap respon estrus domba dan persentase kebuntingan pada domba yang dikawinkan melalui inseminasi buatan dengan semen cair setelah disinkronisasi estrus. Sinkronisasi estrus dilakukan dengan injeksi ganda rentang waktu 11 hari menggunakan hormon prostaglandin F2α sebanyak 0,5 ml secara intravagina. Domba dikawinkan 68-72 jam setelah sinkronisasi kedua. Respon estrus sebanyak 80% atau 44 dari 55 ekor domba. Persentase kebuntingan dari semua domba yang disinkronisasi estrus sebanyak 70,9% atau 39 dari 55 ekor. Dapat disimpulkan bahwa penggunakan hormon prostaglandin sebanyak 0,5 ml cukup efektif untuk sinkronisasi estrus dan metode time fixed artificial insemination dapat diterapkan sebagai metode breeding yang efektif pada peternakan domba.
Keyword: FTAI, estrous synchronization, liquid semen, prostaglandin

Judul: Tingkat Keberhasilan Fixed Time Artificial Insemination pada Domba Menggunakan Semen Beku oleh Peternak.
Abstrak: Fixed Time Artificial Insemination merupakan salah satu cara untuk mengembangbiakkan domba yang cukup ekonomis tanpa perlu melakukan deteksi estrus. Seekor domba mengalami kebuntingan selama 143-151 hari atau 5 bulan sehingga dalam satu tahun seekor domba bisa melahirkan kurang lebih empat anak. Domba umumnya memiliki tingkat penjualan yang tinggi pada saat hari raya Idul Adha dan akikah. Penelitian ini bertujuan mengetahui tingkat keterampilan inseminator dalam hal ini adalah peternak dengan penggunaan Fixed Time Artificial Insemination semen beku pada domba. Penelitian ini dilakukan dengan dua kali injeksi PGF2α, inseminasi, serta pelaksanaan ultrasonografi setelah 40 hari. Hasil ultrasonografi dianalisis secara deskriptif dengan rumus Pregnancy Rate (PR) dan menggunakan hasil wawancara ke peternak untuk detail teknis. Hasil PR pada Mahir Farm pada perlakuan inseminasi buatan semen beku menunjukkan angka sebesar 2,5%. Nilai PR dipengaruhi oleh kualitas semen, kecakapan inseminator, deteksi berahi, penyimpanan semen beku, thawing, deposisi semen, serta dosis semen. Kebanyakan faktor belum sesuai dengan standar yang ada sehingga menyebabkan pregnancy rate yang rendah., Fixed Time Artificial Insemination (FTAI) is a way to breed sheep that is quite economical without the need for estrous detection. Pregnant duration for an ewe is about 143-151 days or 5 months, so that in one year an ewe can give birth to approximately four lambs. Sheep generally have a high level of sales during Eid al-Adha and Aqiqah. This study aims to determine the skill level of inseminators which is the breeder using Fixed Time Artificial Insemination of frozen semen in ewes. This study was conducted with two injections of PGF2α, insemination, and ultrasonography after 40 days. Ultrasound results were analyzed descriptively using the Pregnancy Rate (PR) formula and using the results of interviews with breeders for technical details. Result of PR on Mahir Farm in the frozen semen FTAI treatment showed a figure of 2,5%. The PR value is influenced by semen quality, inseminator performance, heat detection, frozen semen storage, thawing, deposition of semen, and dosage of semen. Most factors are not in accordance with existing standards, causing a low pregnancy rate.
Keyword: artificial insemination, frozen semen, pregnancy rate, sheep

Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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